PIMCO FUNDS MULTI MANAGER SERIES
497, 1998-11-06
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<PAGE>
 

PIMCO Funds Prospectus


Multi-Manager
Series                   STOCK FUNDS

November 1, 1998         Equity Income Fund

Share Class              Value Fund

D                        Renaissance Fund

                         Tax-Efficient Equity Fund

                         Capital Appreciation Fund

                         Mid-Cap Growth Fund



                         SPECIALIZED STOCK FUNDS

                         Innovation Fund



                                                                          PIMCO
                                                                          -----
                                                                          FUNDS

<PAGE>
 
            PIMCO Funds: Multi-Manager Series
            PROSPECTUS
            November 1, 1998
 
            PIMCO Funds: Multi-Manager Series (the "Trust") is an open-end se-
            ries management investment company offering seven separate diver-
            sified investment portfolios (each a "Fund") in this Prospectus,
            each with different investment objectives and strategies. The ad-
            dress of PIMCO Funds: Multi-Manager Series is 840 Newport Center
            Drive, Suite 300, Newport Beach, CA 92660.
 
            Each Fund offers Class D shares in this Prospectus. Through sepa-
            rate prospectuses, certain Funds and other series of the Trust of-
            fer up to five additional classes of shares, Class A, Class B,
            Class C, Institutional Class and Administrative Class shares. See
            "Description of the Trust--Multiple Classes of Shares."
 
            This Prospectus concisely describes the information investors
            should know before investing in Class D shares of the Funds.
            Please read this Prospectus carefully and keep it for further ref-
            erence. Information about the investment objective of each Fund,
            along with a detailed description of the types of securities in
            which each Fund may invest, and of investment policies and re-
            strictions applicable to each Fund, are set forth in this Prospec-
            tus. There can be no assurance that the investment objective of
            any Fund will be achieved. Because the market value of each Fund's
            investments will change, the investment returns and net asset
            value per share of each Fund will vary.
 
            Class D shares are offered only through financial service firms,
            such as broker-dealers or registered investment advisers, with
            which the Funds' distributor has an agreement for the use of the
            Funds in particular investment products, programs or accounts for
            which a fee may be charged. See "How to Buy Shares." If you wish
            to purchase shares directly from the Trust or the Funds' distribu-
            tor, please consider one of the other classes of shares. See "De-
            scription of the Trust--Multiple Classes of Shares."
 
            A Statement of Additional Information, dated November 1, 1998, as
            amended or supplemented from time to time, is available free of
            charge by writing to PIMCO Funds Distributors LLC (the "Distribu-
            tor"), 2187 Atlantic Street, Stamford, Connecticut 06902, or by
            telephoning 1-888-87-PIMCO. The Statement of Additional Informa-
            tion, which contains more detailed information about the Trust,
            has been filed with the Securities and Exchange Commission and is
            incorporated by reference in this Prospectus. The Securities and
            Exchange Commission maintains an Internet World Wide Web site (at
            www.sec.gov) which contains the Statement of Additional Informa-
            tion, materials that are incorporated by reference into this Pro-
            spectus and the Statement of Additional Information, and other in-
            formation about the Funds.
 
            THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SE-
            CURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMIS-
            SION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
            SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
            PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OF-
            FENSE.
 
            SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARAN-
            TEED OR ENDORSED BY, ANY FINANCIAL INSTITUTION, AND THE SHARES ARE
            NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORA-
            TION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND INVOLVE
            RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
  
              TABLE OF CONTENTS
 
PIMCO Funds Overview..................3
Schedule of Fees......................4
Financial Highlights..................6
Investment Objectives and Policies....8
Characteristics and Risks of Securities
 and Investment Techniques...........11
Performance Information..............22
How to Buy Shares....................23
Exchange Privilege...................24

How to Redeem........................25
Distributor..........................25
How Net Asset Value Is Determined....25
Distributions........................26
Taxes................................27
Management of the Trust..............28
Description of the Trust.............32

 
 
2  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            PIMCO Funds Overview
 
            PIMCO Advisors L.P. ("PIMCO Advisors" or the "Adviser") is the in-
            vestment adviser of all the Funds. PIMCO Advisors is one of the
            largest investment management firms in the U.S. As of September
            30, 1998, PIMCO Advisors and its subsidiary partnerships had ap-
            proximately $225.9 billion in assets under management. Each of the
            Funds also has a sub-adviser (each a "Portfolio Manager") respon-
            sible for portfolio investment decisions. All of the Funds' Port-
            folio Managers are affiliates of PIMCO Advisors and are listed be-
            low.
 
 
<TABLE>
<CAPTION>
                                      INVESTMENT SPECIALTY
           ---------------------------------------------------------------------------------
           <S>                        <C>
           CADENCE CAPITAL            Stocks of growth companies that the Portfolio Manager
           MANAGEMENT ("Cadence")     believes are trading at a reasonable price
                                      ------------------------------------------------------
           NFJ INVESTMENT GROUP       Value stocks that the Portfolio Manager believes are
           ("NFJ")                    undervalued and/or offer above-average dividend yields
                                      ------------------------------------------------------
           COLUMBUS CIRCLE            Stocks, using its "Positive Momentum & Positive
           INVESTORS ("Columbus       Surprise" discipline
           Circle")
                                      ------------------------------------------------------
           PARAMETRIC PORTFOLIO       Stocks, using quantitatively-driven fundamental
           ASSOCIATES ("Parametric")  analysis and economic methods, with a specialty in
                                      tax-efficient products
</TABLE>
 
 
<TABLE>
<CAPTION>
                        FUND NAME     INVESTMENT OBJECTIVE     PRIMARY INVESTMENTS (/1/)  PORTFOLIO MANAGER
           -------------------------------------------------------------------------------------------------
<S>        <C>          <C>          <C>                        <C>                        <C> 
FUND       STOCK FUNDS  Equity        Current income as a        Common stocks with below-     NFJ
PROFILES                Income        primary objective; long-   average price to earnings
                                      term growth of capital     ratios and higher dividend
                                      as a secondary objective   yields relative to their
                                                                 industry groups
                      --------------------------------------------------------------------------------------
                        Value         Long-term growth of        Common stocks with below-     NFJ
                                      capital and income         average price to earnings
                                                                 ratios relative to their
                                                                 industry groups
                      --------------------------------------------------------------------------------------
                        Renaissance   Long-term growth of        Common stocks with below-     Columbus 
                                      capital and income         average valuations that       Circle
                                                                 have improving business
                                                                 fundamentals
                      -------------------------------------------------------------------------------------
                        Tax-Efficient Maximum after-tax growth   A broadly diversified         Parametric
                        Equity        of capital                 portfolio of at least 200
                                                                 common stocks of companies
                                                                 with larger market
                                                                 capitalizations
                      -------------------------------------------------------------------------------------
                        Capital       Growth of capital          Common stocks of companies    Cadence
                        Appreciation                             with market
                                                                 capitalizations of at
                                                                 least $1 billion that have
                                                                 improving fundamentals and
                                                                 whose stock is reasonably
                                                                 valued by the market
                      -------------------------------------------------------------------------------------
                        Mid-Cap       Growth of capital          Common stocks of companies    Cadence
                        Growth                                   with market
                                                                 capitalizations in excess
                                                                 of $500 million that have
                                                                 improving fundamentals and
                                                                 whose stock is reasonably
                                                                 valued by the market
           -------------------------------------------------------------------------------------------------
           SPECIALIZED  Innovation    Capital appreciation; no   Common stocks of companies    Columbus 
           STOCK FUNDS                consideration given to     with small, medium and        Circle
                                      income                     large market
                                                                 capitalizations
                                                                 (technology-related
                                                                  stocks)
</TABLE>
 
 
            1. For specific information concerning the market capitalizations
            of companies in which each Fund may invest and each Fund's invest-
            ment style, see "Investment Objectives and Policies" in this Pro-
            spectus.
 
                                            November 1, 1998 Prospectus     3
<PAGE>
 
            Schedule of Fees
 
 
              ALL FUNDS--CLASS D SHARES
              ---------------------------------------------------------------
              MAXIMUM INITIAL SALES CHARGE IMPOSED ON PURCHASES
SHAREHOLDER   (as a percentage of offering price at time of purchase)   None
TRANSACTION   ---------------------------------------------------------------
EXPENSES      MAXIMUM SALES CHARGE IMPOSED ON REINVESTED DIVIDENDS
              (as a percentage of net asset value at time of purchase)  None
              ---------------------------------------------------------------
              MAXIMUM DEFERRED SALES CHARGE
              (as a percentage of original purchase price)              None
              ---------------------------------------------------------------
              EXCHANGE FEE                                              None
 

<TABLE>
<CAPTION>
 
                                                                        EXAMPLE: You would pay the
                                                                        following expenses on a $1,000
                                                                        investment assuming (1) 5%
                                 ANNUAL FUND OPERATING EXPENSES         annual return and (2) with or
                                 (As a percentage of average net        without redemption at the end
                                 assets):                               of each time period:
                                                              TOTAL
                                          ADMINI-   12B-1     FUND
                                 ADVISORY STRATIVE  (SERVICE) OPERATING YEAR
           FUND                  FEES     FEES(/1/) FEES(/1/) EXPENSES  1        3       5       10
           ----------------------------------------------------------------------------------------------
           <S>                   <C>      <C>       <C>       <C>       <C>      <C>     <C>     <C>
           EQUITY INCOME         .45%     .40%      .25%      1.10%         $11      $35     $61     $134
           ----------------------------------------------------------------------------------------------
           VALUE                 .45      .40       .25       1.10           11       35      61      134
           ----------------------------------------------------------------------------------------------
           RENAISSANCE           .60      .40       .25       1.25           13       40      69      151
           ----------------------------------------------------------------------------------------------
           TAX-EFFICIENT EQUITY  .45      .40       .25       1.10           11       35      --       --
           ----------------------------------------------------------------------------------------------
           CAPITAL APPRECIATION  .45      .40       .25       1.10           11       35      61      134
           ----------------------------------------------------------------------------------------------
           MID-CAP GROWTH        .45      .40       .25       1.10           11       35      61      134
           ----------------------------------------------------------------------------------------------
           INNOVATION            .65      .40       .25       1.30           13       41      71      157
</TABLE>
 
            1. The Funds' administration agreement includes a plan for Class D
            shares that has been adopted in conformity with the requirements
            set forth in Rule 12b-1 under the Investment Company Act of 1940.
            The plan provides that up to .25% per annum of the total fees paid
            under the administration agreement may represent reimbursement for
            expenses in respect of activities ("subject activities") that may
            be deemed to be primarily intended to result in the sale of Class
            D shares. Each Fund will pay a total of .65% per annum under the
            administration agreement regardless of whether a portion or none
            of the .25% authorized under the plan is paid for subject servic-
            es. To the extent that any payments are deemed to be made pursuant
            to the plan, the Funds intend to treat such payments as "service
            fees" for purposes of applicable rules of the National Association
            of Securities Dealers, Inc. (the "NASD"). See "Management of the
            Trust--Fund Administrator." To the extent that such payments for
            subject activities are deemed not to be "service fees," Class D
            shareholders may, depending on the length of time the shares are
            held, pay more than the economic equivalent of the maximum front-
            end sales charges permitted by relevant rules of the NASD.
 
            The purpose of the foregoing tables is to assist investors in un-
            derstanding the various costs and expenses of the Trust that are
            borne directly or indirectly by Class D shareholders of the Funds.
            The information is based upon each Fund's current fees and ex-
            penses.
 
            NOTE: THE FIGURES SHOWN IN THE EXAMPLE ARE ENTIRELY HYPOTHETICAL.
            THEY ARE NOT REPRESENTATIONS OF PAST OR FUTURE PERFORMANCE OR EX-
            PENSES; ACTUAL PERFORMANCE AND/OR EXPENSES MAY BE MORE OR LESS
            THAN SHOWN.
 
4  PIMCO Funds: Multi-Manager Series

<PAGE>
 
 
 
                      (This page left blank intentionally)
 
 
 
 
                                         November 1, 1998 Prospectus         5
<PAGE>
 
Financial Highlights
 
The financial highlights set forth on the following pages present certain in-
formation and ratios as well as performance information for Class D shares of
the Funds that were operational during the periods listed. The information pro-
vided below is included in the June 30, 1998 PIMCO Funds Annual Report (relat-
ing to Class D shares) and has been audited by PricewaterhouseCoopers LLP, in-
dependent accountants, whose report thereon is also included in such Annual Re-
port. The Annual Report is incorporated by reference in the Statement of Addi-
tional Information and may be obtained without charge from the Distributor. Fi-
nancial Statements and related notes are also incorporated by reference in the
Statement of Additional Information.
 
<TABLE>
<CAPTION>
                  NET ASSET                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS     DISTRIBUTIONS
Selected Per      VALUE        NET           UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET          IN EXCESS OF
Class D Share     BEGINNING   INVESTMENT    GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL  NET REALIZED
Data for the      OF PERIOD   INCOME (LOSS) INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS             CAPITAL GAINS
Period Ended:     ----------- ------------- -------------- --------------- ---------- ------------- ----------------  -------------
<S>               <C>         <C>           <C>            <C>             <C>        <C>           <C>               <C>       
EQUITY INCOME                                                                                                                   
 FUND                                                                                                                           
 04/08/98-                                                                                                                      
  06/30/98           $  16.71   $ 0.09 (a)     $(0.66)(a)     $  (0.57)     $  (0.10)   $   0.00        $   0.00        $   0.00
VALUE FUND                                                                                                                      
 04/08/98-                                                                                                                      
  06/30/98           $  15.99   $ 0.04 (a)     $(0.34)(a)     $  (0.30)     $  (0.05)   $   0.00        $   0.00        $   0.00
RENAISSANCE FUND                                                                                                                
 04/08/98-                                                                                                                      
  06/30/98           $  18.99   $ 0.01 (a)     $ 0.10 (a)     $   0.11      $   0.00    $   0.00        $   0.00        $   0.00
CAPITAL                                                                                                                         
 APPRECIATION                                                                                                                   
 FUND                                                                                                                           
 04/08/98-                                                                                                                      
  06/30/98           $  25.41   $ 0.02 (a)     $ 0.58 (a)     $   0.60      $   0.00    $   0.00        $   0.00        $   0.00
MID-CAP GROWTH                                                                                                                  
 FUND                                                                                                                           
 04/08/98-                                                                                                                      
  06/30/98           $  23.97   $ 0.00 (a)     $ 0.02 (a)     $   0.02      $   0.00    $   0.00        $   0.00        $   0.00
INNOVATION FUND                                                                                                                 
 04/08/98-                                                                                                                      
  06/30/98           $  21.50   $(0.05)(a)     $ 2.83 (a)     $   2.78      $   0.00    $   0.00        $   0.00        $   0.00 
</TABLE>
*Annualized
(a) Per share amounts based upon average number of shares outstanding during the
    period.
 

6 PIMCO Funds: Multi-Manager Series

<PAGE>
 
  
 
<TABLE>
<CAPTION>
                                                                                             RATIO OF NET
                                                                                 RATIO OF    INVESTMENT
DISTRIBUTION  TAX BASIS               NET ASSET                                  EXPENSES TO INCOME (LOSS) TO
FROM          RETURN OF TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET AVERAGE NET      PORTFOLIO
EQUALIZATION  CAPITAL   DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000s) ASSETS      ASSETS           TURNOVER RATE
- ------------  --------- ------------- ------------ ------------ ---------------- ----------- ---------------- -------------
<S>           <C>       <C>           <C>          <C>          <C>              <C>         <C>              <C>
  $   0.00    $   0.00    $  (0.10)     $  16.04      (3.43)%       $    104        1.10%*         2.23%*           45%
  $   0.00    $   0.00    $  (0.05)     $  15.64      (1.85)%       $     98        1.10%*         1.23%*           77%
  $   0.00    $   0.00    $   0.00      $  19.10       0.58%        $    126        1.25%*         0.21%*          192%
  $   0.00    $   0.00    $   0.00      $  26.01       2.36%        $    118        1.10%*         0.27%*           75%
  $   0.00    $   0.00    $   0.00      $  23.99       0.08%        $    142        1.10%*         0.03%*           66%
  $   0.00    $   0.00    $   0.00      $  24.28      12.93%        $    139        1.30%*        (0.99)%*         100%
</TABLE>
 
                                               November 1, 1998 Prospectus  7
<PAGE>
 
            Investment Objectives and Policies


            The investment objective and general investment policies of each
            Fund are described below. There can be no assurance that the in-
            vestment objective of any Fund will be achieved. Because the mar-
            ket value of each Fund's investments will change, the net asset
            value per share of each Fund will also vary. Specific portfolio
            securities eligible for purchase by the Funds, investment tech-
            niques that may be used by the Funds, and the risks associated
            with these securities and techniques are described more fully un-
            der "Characteristics and Risks of Securities and Investment Tech-
            niques" in this Prospectus and "Investment Objectives and Poli-
            cies" in the Statement of Additional Information.
 
 
FUND        EQUITY INCOME FUND seeks current income as a primary investment
DESCRIP-    objective, and long-term growth of capital as a secondary objec-
TIONS       tive. The Fund invests primarily in common stocks characterized by
            having below-average price to earnings ("P/E") ratios and higher
            dividend yields relative to their industry groups. In selecting
            securities, the Portfolio Manager classifies a universe of approx-
            imately 2,000 stocks by industry, each of which has a minimum mar-
            ket capitalization of $200 million at the time of investment. The
            universe is then screened to find the lowest P/E ratios in each
            industry, subject to application of quality and price momentum
            screens. From this group, approximately 25 stocks with the highest
            yields are chosen for the Fund. The universe is then rescreened to
            find the highest yielding stock in each industry, subject to ap-
            plication of quality and price momentum screens. From this group,
            approximately 25 stocks with the lowest P/E ratios are added to
            the Fund. Although quarterly rebalancing is a general rule, re-
            placements are made whenever an alternative stock within the same
            industry has a significantly lower P/E ratio or higher dividend
            yield than the current Fund holding. The Portfolio Manager for the
            Equity Income Fund is NFJ.
 
            VALUE FUND seeks long-term growth of capital and income. The Fund
            invests primarily in common stocks characterized by having below-
            average P/E ratios relative to their industry groups. In selecting
            securities, the Portfolio Manager classifies a universe of approx-
            imately 2,000 stocks by industry, each of which has a minimum mar-
            ket capitalization of $200 million at the time of investment. The
            universe is then screened to find the stocks with the lowest P/E
            ratios in each industry, subject to application of quality and
            price momentum screens. The stocks in each industry with the low-
            est P/E ratios that pass the quality and price momentum screens
            are then selected for the Fund. The Fund usually invests in ap-
            proximately 50 stocks. Although quarterly rebalancing is a general
            rule, replacements are made whenever an alternative stock within
            the same industry has a significantly lower P/E ratio than the
            current Fund holdings. The Portfolio Manager for the Value Fund is
            NFJ.
 
            RENAISSANCE FUND seeks long-term growth of capital and income. The
            Fund invests primarily in common stocks having below-average valu-
            ations whose issuers are experiencing improvements in their busi-
            ness fundamentals. Relative valuation is determined using a multi-
            factor approach that examines characteristics such as price to
            book, price to earnings and price to cash flow ratios. Stocks
            which pass the valuation screen are further analyzed to identify
            the key drivers of financial results and catalysts for change
            which indicate that a company may demonstrate improving fundamen-
            tals in the future. Stocks which appear likely to exceed consensus
            expectations are candidates for addition to the Fund's portfolio.
            Stocks are sold from the Fund's portfolio when the Portfolio Man-
            ager believes that their ability to exceed investor expectations
            has diminished or when their valuations have become excessive.
               The Fund may invest a portion of its assets in securities of
            foreign issuers traded in foreign securities markets (not includ-
            ing Eurodollar certificates of deposit), which will not exceed 15%
            of the Fund's assets at the time of investment. Investing in the
            securities of foreign issuers involves special risks and consider-
            ations not typically associated with investing in U.S. securities.
            For a discussion of such risks, see "Characteristics and Risks of
            Securities and Investment Techniques--Foreign Securities." The
            Fund may also purchase and write call and put options on securi-
            ties and securities indexes; enter into futures contracts and use
            options on futures contracts; buy or sell foreign currencies; and
            enter into forward foreign currency contracts. The Portfolio Man-
            ager for the Renaissance Fund is Columbus Circle.
 
 
8  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            TAX-EFFICIENT EQUITY FUND seeks maximum after-tax growth of capi-
            tal. The Fund attempts to provide a total return which exceeds the
            return of the Standard & Poor's 500 Composite Stock Price Index
            (the "S&P 500"). In addition, the Fund seeks to achieve superior
            after-tax returns for its shareholders in part by minimizing the
            taxes they incur in connection with the Fund's investment income
            and realized capital gains by using the strategies described be-
            low. Notwithstanding these strategies, the Fund may have taxable
            investment income and may realize taxable gains from time to time.

               The Fund invests primarily in a broadly diversified portfolio
            of at least 200 common stocks of companies with larger market cap-
            italizations. In selecting specific securities, the Portfolio Man-
            ager uses a proprietary quantitative model that ranks companies
            based on long-term (5-10 years) price appreciation potential
            through analysis of such factors as growth of sustainable earnings
            and dividend behavior. Securities in the top 50% of the model's
            ranking are considered for purchase. The Portfolio Manager's sell
            discipline incorporates a focus on reducing the realization of
            capital gains. Each sell candidate is evaluated based on its cost,
            current market value, and anticipated benefit of replacement. Se-
            curities in the bottom 20% of the model's ranking are considered
            for sale. The Fund may engage in the purchase and writing of op-
            tions on securities indexes and may also invest in stock index
            futures contracts and options thereon.

               The Portfolio Manager utilizes a range of active tax management
            techniques to minimize taxable distributions, including: low port-
            folio turnover; emphasis towards low-dividend, growth-oriented
            companies; tax lot accounting (identification of specific shares
            of securities being sold that have the lowest tax cost); and regu-
            lar rebalancing to capture available tax credits. The Fund will
            generally seek to avoid realizing net short-term capital gains
            and, when realizing gains, will attempt to realize long-term gains
            (i.e., gains on securities held for more than 12 months). The Fund
            intends to notify each shareholder as to that portion of his or
            her capital gain dividends which qualifies for a long-term tax
            rate of 20% in the hands of the shareholder. Net short-term capi-
            tal gains, when distributed, will be taxed as ordinary income, at
            graduated rates of up to 39.6%. When the Fund decides to sell a
            particular appreciated security, it will normally select for sale
            first those share lots with holding periods exceeding 12 months
            and among those, the share lots with the highest cost basis. The
            Fund may, when prudent, sell securities to realize capital losses
            that can be used to offset realized capital gains.

               To protect against price declines in securities holdings with
            large accumulated capital gains, the Fund may, to the extent per-
            mitted by law, use hedging techniques such as the purchase of put
            options, the sale of stock index futures contracts and equity
            swaps. By using these techniques rather than selling such securi-
            ties, the Fund can reduce its exposure to price declines in the
            securities without realizing substantial capital gains. In limited
            circumstances, the Fund may follow the practice of distributing
            selected appreciated securities to meet redemptions of certain in-
            vestors and may, within certain limits, use the selection of secu-
            rities distributed to meet such redemptions as a management tool.
            By distributing appreciated securities the Fund can reduce its po-
            sition in such securities without realizing capital gains. During
            periods of net withdrawals by investors, using distributions of
            securities could enable the Fund to avoid the forced sale of secu-
            rities to raise cash for meeting redemptions.

               It is expected that by employing the various tax-efficient man-
            agement strategies described above, the Fund can minimize the ex-
            tent to which shareholders incur taxes as a result of realized
            capital gains. The Fund may nevertheless realize gains and share-
            holders will incur tax liability from time to time. The Portfolio
            Manager for the Tax-Efficient Equity Fund is Parametric.
 
            CAPITAL APPRECIATION FUND seeks growth of capital. The Fund in-
            vests primarily in common stocks of companies that have improving
            fundamentals (such as growth of earnings and dividends) and whose
            stock is reasonably valued by the market. Stocks for the Fund are
            selected from a universe of the approximately 1,000 largest market
            capitalization stocks, all of which are those of companies with
            market capitalizations of at least $1 billion at the time of in-
            vestment. The Fund usually invests in approximately 60 to 100 com-
            mon stocks. Each issue is screened and ranked using five distinct
            computerized models, including: (i) a dividend growth screen, (ii)
            an equity growth screen, (iii) an earnings
 


                                            November 1, 1998 Prospectus  9
<PAGE>
 
            growth screen, (iv) an earnings momentum screen, and (v) an earn-
            ings surprise screen. The Portfolio Manager believes that the mod-
            els identify the stocks in the universe exhibiting growth charac-
            teristics with reasonable valuations. Stocks are replaced when
            they score worse-than-median screen ranks, have negative earnings
            surprises, or show poor relative price performance. The universe
            is rescreened frequently to obtain a favorable composition of
            growth and value characteristics for the entire Fund. The Portfo-
            lio Manager for the Capital Appreciation Fund is Cadence.
 
            MID-CAP GROWTH FUND seeks growth of capital. The Fund invests pri-
            marily in common stocks of middle capitalization companies that
            have improving fundamentals (such as growth of earnings and divi-
            dends) and whose stock is reasonably valued by the market. Stocks
            for the Fund are selected from a universe of companies with market
            capitalizations in excess of $500 million at the time of invest-
            ment, excluding the 200 companies with the highest market capital-
            ization. The Fund usually invests in approximately 60 to 100 com-
            mon stocks. Each issue is screened and ranked using five distinct
            computerized models, including: (i) a dividend growth screen, (ii)
            an equity growth screen, (iii) an earnings growth screen, (iv) an
            earnings momentum screen, and (v) an earnings surprise screen. The
            Portfolio Manager believes that the models identify the stocks in
            the universe exhibiting growth characteristics with reasonable
            valuations. Stocks are replaced when they score worse-than-median
            screen ranks, have negative earnings surprises, or show poor rela-
            tive price performance. The universe is rescreened frequently to
            obtain a favorable composition of growth and value characteristics
            for the entire Fund. The Portfolio Manager for the Mid-Cap Growth
            Fund is Cadence.
 
            INNOVATION FUND seeks capital appreciation. No consideration is
            given to income. The Fund invests primarily (i.e., at least 65% of
            its assets) in common stocks of companies which utilize innovative
            technologies to gain a strategic competitive advantage in their
            industry as well as companies that provide and service those tech-
            nologies. Securities will be selected with minimal emphasis on
            more traditional factors such as growth potential or value rela-
            tive to intrinsic worth. Instead, the Fund will be guided by the
            theory of Positive Momentum & Positive Surprise (see "Management
            of the Trust--Portfolio Managers--Columbus Circle"), with special
            emphasis on common stocks of companies whose perceived strength
            lies in their use of innovative technologies in new products, en-
            hanced distribution systems and improved management techniques.
            Although the Fund emphasizes the utilization of technologies, it
            is not restricted to investment in companies in a particular busi-
            ness sector or industry.
               The Fund may invest a portion of its assets in securities of
            foreign issuers traded in foreign securities markets (not includ-
            ing Eurodollar certificates of deposit), which will not exceed 15%
            of the Fund's assets at the time of investment. Investing in the
            securities of foreign issuers involves special risks and consider-
            ations not typically associated with investing in U.S. companies.
            For a discussion of such risks, see "Characteristics and Risks of
            Securities and Investment Techniques--Foreign Securities." The
            Fund may also purchase and write call and put options on securi-
            ties and securities indexes; enter into futures contracts and use
            options on futures contracts; buy or sell foreign currencies; and
            enter into forward foreign currency contracts. The Portfolio Man-
            ager for the Innovation Fund is Columbus Circle.
 
 
STOCK       The Equity Income, Value, Tax-Efficient Equity, Capital Apprecia-
INVESTMENTS tion and Mid-Cap Growth Funds will each invest primarily (normally
            at least 65% of its assets) in common stock. Each of these Funds
            may maintain a portion of its assets, which will usually not ex-
            ceed 10%, in U.S. Government securities, high quality debt securi-
            ties (whose maturity or remaining maturity will not exceed five
            years), money market obligations, and in cash to provide for pay-
            ment of the Fund's expenses and to meet redemption requests. It is
            the policy of these Funds to be as fully invested in common stocks
            as practicable at all times. This policy precludes these Funds
            from investing in debt securities as a defensive investment pos-
            ture (although these Funds may invest in such securities to pro-
            vide for payment of expenses and to meet redemption requests). Ac-
            cordingly, investors in these Funds bear the risk of general de-
            clines in stock prices and the risk that a Fund's exposure to such
            declines cannot be lessened by investment in debt securities.
            These Funds may also invest in convertible securities, preferred
            stocks, and warrants, subject to certain limitations.

 
10  PIMCO Funds: Multi-Manager Series
<PAGE>
 
                    The Renaissance and Innovation Funds will invest primarily
                 (normally at least 65% of its assets) in common stocks, and may
                 also invest in other equity securities, including preferred
                 stocks and securities (including debt securities and warrants)
                 convertible into or exercisable for common stocks. Each of
                 these Funds may invest a portion of its assets in debt
                 securities and, for temporary defensive purposes, up to 100% of
                 its assets in short-term U.S. Government securities and other
                 money market instruments.
                    One or more of the Funds may temporarily not be invested
                 primarily in equity securities immediately following the
                 commencement of operations or after receipt of significant new
                 monies. While attempting to identify suitable investments, the
                 Funds may hold assets in cash, short-term U.S. Government
                 Securities and other money market instruments. Any of the Funds
                 may temporarily not contain the number of securities in which
                 it normally invests if the Fund does not have sufficient assets
                 to be fully invested, or pending the Portfolio Manager's
                 ability to prudently invest new monies.
                    The Funds may also lend portfolio securities; enter into
                 repur-chase agreements and reverse repurchase agreements
                 (subject to the Funds' investment limitations described below);
                 purchase and sell securities on a when-issued or delayed
                 delivery basis; and enter into forward commitments to purchase
                 securities. Each of the Funds may invest in American Depository
                 Receipts ("ADRs"), and the Re-naissance and Innovation Funds
                 may also invest in European Deposi-tory Receipts ("EDRs") and
                 Global Depository Receipts ("GDRs"). For more information on
                 these investment practices, see "Charac-teristics and Risks of
                 Securities and Investment Techniques" in this Prospectus and
                 "Investment Objectives and Policies" in the Statement of
                 Additional Information.
 
                 Characteristics and Risks of
                 Securities and Investment Techniques
 
                 The different types of securities and investment techniques
                 used by the individual Funds all have attendant risks of
                 varying degrees. For example, with respect to common stock,
                 there can be no assurance of capital appreciation, and there is
                 a risk of market decline. With respect to debt securities,
                 including money market instruments, there is the risk that the
                 issuer of a security may not be able to meet its obligation to
                 make scheduled interest or principal payments. Because each
                 Fund seeks a different investment objective and has different
                 investment policies, each is subject to varying degrees of
                 financial, market and credit risks. Therefore, investors
                 should carefully consider the investment objec-tive, investment
                 policies and potential risks of any Fund or Funds before
                 investing.
                    The following describes potential risks associated with
                 different types of investment techniques that may be used by
                 the individual Funds. For more detailed information on these
                 investment techniques, as well as information on the types of
                 securities in which some or all of the Funds may invest, see
                 the Statement of Additional Information.
  
                 Certain of the Funds may invest in common stock of companies
INVESTMENTS      with market capitalizations that are small compared to other
IN COMPANIES     publicly traded companies. Generally, small market
WITH SMALL       capitalization is considered to be less than $1.5 billion and
AND MEDIUM       large market capitalization is considered to be more than $5
MARKET           billion. Investments in larger companies present certain
CAPITALIZATIONS  advantages in that such companies generally have greater
                 financial resources, more extensive research and development,
                 manufacturing, marketing and service capabilities, and more
                 stability and greater depth of management and technical
                 personnel. Investments in smaller, less seasoned compa-nies may
                 present greater opportunities for growth but also may in-volve
                 greater risks than customarily are associated with more es-
                 tablished companies. The securities of smaller companies may be
                 subject to more abrupt or erratic market movements than larger,
                 more established companies. These companies may have limited
                 product lines, markets or financial resources, or they may be
                 dependent upon a limited management group. Their securities
                 may be traded in the over-the-counter market or on a regional
                 exchange, or may otherwise have limited liquidity. As a result
                 of owning large positions in this type of security, a Fund is
                 subject to the additional risk of possibly having to sell
                 portfolio securities at disadvantageous times and prices if
                 redemptions require the Fund to liquidate its securities
                 positions. In addition, it may be prudent for a Fund with a






 
                                              November 1, 1998 Prospectus  11
<PAGE>
 
            relatively large asset size to limit the number of relatively
            small positions it holds in securities having limited liquidity in
            order to minimize its exposure to such risks, to minimize transac-
            tion costs, and to maximize the benefits of research. As a conse-
            quence, as a Fund's asset size increases, the Fund may reduce its
            exposure to illiquid small capitalization securities, which could
            adversely affect performance.
               Many of the Funds may also invest in stocks of companies with
            medium market capitalizations. Whether a U.S. issuer's market cap-
            italization is medium is determined by reference to the capital-
            ization for all issuers whose equity securities are listed on a
            United States national securities exchange or which are reported
            on NASDAQ. Issuers with market capitalizations within the range of
            capitalization of companies included in the S&P Mid Cap 400 Index
            may be regarded as being issuers with medium market capitaliza-
            tions. Such investments share some of the risk characteristics of
            investments in stocks of companies with small market capitaliza-
            tions described above, although such companies tend to have longer
            operating histories, broader product lines and greater financial
            resources and their stocks tend to be more liquid and less vola-
            tile than those of smaller capitalization issuers.
 
FOREIGN     The Renaissance and Innovation Funds may invest up to 15% of their
SECURITIES  respective assets in securities which are traded principally in
            securities markets outside the United States (Eurodollar certifi-
            cates of deposit are excluded for purposes of these limitations),
            and may invest without limit in securities of foreign issuers that
            are traded in U.S. markets. All of the Funds may invest in ADRs.
            In addition, the Renaissance and Innovation Funds may invest in
            EDRs and GDRs. ADRs are dollar denominated receipts issued gener-
            ally by domestic banks and representing the deposit with the bank
            of a security of a foreign issuer, and are publicly traded on ex-
            changes or over-the-counter in the United States. EDRs are re-
            ceipts similar to ADRs and are issued and traded in Europe. GDRs
            may be offered privately in the United States and also trade in
            public or private markets in other countries.
               Investing in the securities of issuers in any foreign country
            involves special risks and considerations not typically associated
            with investing in U.S. companies. Shareholders should consider
            carefully the substantial risks involved in investing in securi-
            ties issued by companies and governments of foreign nations. These
            risks include: differences in accounting, auditing and financial
            reporting standards; generally higher commission rates on foreign
            portfolio transactions; the possibility of nationalization, expro-
            priation or confiscatory taxation; adverse changes in investment
            or exchange control regulations (which may include suspension of
            the ability to transfer currency from a country); and political
            instability which could affect U.S. investments in foreign coun-
            tries. Individual foreign economies may differ favorably or unfa-
            vorably from the U.S. economy in such respects as growth of gross
            domestic product, rate of inflation, capital reinvestment, re-
            sources, self-sufficiency, and balance of payments position. The
            securities markets, values of securities, yields, and risks asso-
            ciated with securities markets may change independently of each
            other. Additionally, foreign securities and dividends and interest
            payable on those securities may be subject to foreign taxes, in-
            cluding taxes withheld from payments on those securities. Foreign
            securities often trade with less frequency and volume than domes-
            tic securities and therefore may exhibit greater price volatility.
            Additional costs associated with an investment in foreign securi-
            ties may include higher custodial fees than apply to domestic cus-
            todial arrangements and transaction costs of foreign currency con-
            versions. Changes in foreign exchange rates also will affect the
            value of securities denominated or quoted in currencies other than
            the U.S. dollar.
               A Fund's investments in foreign currency denominated debt obli-
            gations and hedging activities will likely produce a difference
            between its book income and its taxable income. This difference
            may cause a portion of the Fund's income distributions to consti-
            tute returns of capital for tax purposes or require the Fund to
            make distributions exceeding book income to qualify as a regulated
            investment company for federal tax purposes.
               To the extent that the Renaissance and Innovation Funds invest
            in foreign securities, these Funds may invest in the securities of
            issuers based in countries with developing economies. Investing in
            developing (or "emerging market") countries involves certain risks
            not typically associated with investing in U.S. securities, and
            imposes risks greater than, or in addition to, risks of investing
            in foreign, developed countries. A number of emerging market coun-
            tries restrict, to varying degrees, foreign investment in securi-
            ties. Repatriation of investment income, capital, and the proceeds
            of sales
 

12  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            by foreign investors may require governmental registration and/or
            approval in some emerging market countries. A number of the cur-
            rencies of emerging market countries have experienced significant
            declines against the U.S. dollar in recent years, and devaluation
            may occur subsequent to investments in these currencies by a Fund.
            Inflation and rapid fluctuations in inflation rates have had, and
            may continue to have, negative effects on the economies and secu-
            rities markets of certain emerging market countries. Many of the
            emerging securities markets are relatively small, have low trading
            volumes, suffer periods of relative illiquidity, and are charac-
            terized by significant price volatility. There is a risk in emerg-
            ing market countries that a future economic or political crisis
            could lead to price controls, forced mergers of companies, expro-
            priation or confiscatory taxation, seizure, nationalization, or
            creation of government monopolies, any of which may have a detri-
            mental effect on a Fund's investment.
               Additional risks of investing in emerging market countries may
            include: currency exchange rate fluctuations; greater social, eco-
            nomic and political uncertainty and instability (including the
            risk of war); more substantial governmental involvement in the
            economy; less governmental supervision and regulation of the secu-
            rities markets and participants in those markets; unavailability
            of currency hedging techniques in certain emerging market coun-
            tries; the fact that companies in emerging market countries may be
            newly organized and may be smaller and less seasoned companies;
            the difference in, or lack of, auditing and financial reporting
            standards, which may result in unavailability of material informa-
            tion about issuers; the risk that it may be more difficult to ob-
            tain and/or enforce a judgment in a court outside the United
            States; and significantly smaller market capitalization of securi-
            ties markets. Also, any change in the leadership or policies of
            emerging market countries, or the countries that exercise a sig-
            nificant influence over those countries, may halt the expansion of
            or reverse the liberalization of foreign investment policies now
            occurring and adversely affect existing investment opportunities.
               In addition, emerging securities markets may have different
            clearance and settlement procedures, which may be unable to keep
            pace with the volume of securities transactions or otherwise make
            it difficult to engage in such transactions. Settlement problems
            may cause a Fund to miss attractive investment opportunities, hold
            a portion of its assets in cash pending investment, or delay in
            disposing of a portfolio security. Such a delay could result in
            possible liability to a purchaser of the security.
 
FOREIGN     Foreign currency exchange rates may fluctuate significantly over
CURRENCY    short periods of time. They generally are determined by the forces
TRANSACTIONSof supply and demand in the foreign exchange markets and the rela-
            tive merits of investments in different countries, actual or per-
            ceived changes in interest rates and other complex factors, as
            seen from an international perspective. Currency exchange rates
            also can be affected unpredictably by intervention (or the failure
            to intervene) by U.S. or foreign governments or central banks, or
            by currency controls or political developments in the U.S. or
            abroad. For example, significant uncertainty surrounds the pro-
            posed introduction of the euro (a common currency unit for the Eu-
            ropean Union) in January 1999 and its effect on the value of secu-
            rities denominated in local European currencies. These and other
            currencies in which the Funds' assets are denominated may be de-
            valued against the U.S. dollar, resulting in a loss to the Funds.
            For a more complete discussion of foreign currency risks (includ-
            ing those associated with the euro), please see "Investment Objec-
            tives and Policies--Foreign Currencies" in the Statement of Addi-
            tional Information.
               The Renaissance and Innovation Funds may enter into forward
            foreign currency exchange contracts to reduce the risks of adverse
            changes in foreign exchange rates. All of the Funds that may buy
            or sell foreign currencies may enter into forward foreign currency
            exchange contracts to reduce the risks of adverse changes in for-
            eign exchange rates. A forward foreign currency exchange contract
            involves an obligation to purchase or sell a specific currency at
            a future date, which may be any fixed number of days from the date
            of the contract agreed upon by the parties, at a price set at the
            time of the contract. By entering into a forward foreign currency
            exchange contract, the Fund "locks in" the exchange rate between
            the currency it will deliver and the currency it will receive for
            the duration of the contract. As a result, a Fund reduces its ex-
            posure to changes in the value of the currency it will deliver and
            increases its exposure to changes in the value of the currency it
            will exchange into. The effect on the value of a Fund is similar
 

                                            November 1, 1998 Prospectus  13
<PAGE>
 
            to selling securities denominated in one currency and purchasing
            securities denominated in another currency. Contracts to sell for-
            eign currency would limit any potential gain which might be real-
            ized by a Fund if the value of the hedged currency increases. A
            Fund may enter into these contracts for the purpose of hedging
            against foreign exchange risk arising from the Fund's investment
            or anticipated investment in securities denominated in foreign
            currencies. Suitable hedging transactions may not be available in
            all circumstances and there can be no assurance that a Fund will
            engage in such transactions at any given time or from time to
            time. Also, such transactions may not be successful and may elimi-
            nate any chance for a Fund to benefit from favorable fluctuations
            in relevant foreign currencies.
 
MONEY       Each of the Funds may invest at least a portion of its assets in
MARKET      the following kinds of money market instruments:
INSTRUMENTS    (1) short-term U.S. Government securities;
               (2) certificates of deposit, bankers' acceptances and other
                   bank obligations rated in the two highest rating categories
                   by at least two NRSROs, or, if rated by only one NRSRO, in
                   such agency's two highest grades, or, if unrated,
                   determined to be of comparable quality by the Adviser or a
                   Portfolio Manager. Bank obligations must be those of a bank
                   that has deposits in excess of $2 billion or that is a
                   member of the Federal Deposit Insurance Corporation. A Fund
                   may invest in obligations of U.S. branches or subsidiaries
                   of foreign banks ("Yankee dollar obligations") or foreign
                   branches of U.S. banks ("Eurodollar obligations");
               (3) commercial paper rated in the two highest rating categories
                   by at least two NRSROs, or, if rated by only one NRSRO, in
                   such agency's two highest grades, or, if unrated, deter-
                   mined to be of comparable quality by the Adviser or a Port-
                   folio Manager;
               (4) corporate obligations with a remaining maturity of 397 days
                   or less whose issuers have outstanding short-term debt ob-
                   ligations rated in the highest rating category by at least
                   two NRSROs, or, if rated by only one NRSRO, in such
                   agency's highest grade, or, if unrated, determined to be of
                   comparable quality by the Adviser or a Portfolio Manager;
                   and
               (5) repurchase agreements with domestic commercial banks or reg-
                   istered broker-dealers.
 
 
MORTGAGE-   The Renaissance and Innovation Funds may invest in mortgage-re-
RELATED AND lated securities, and in other asset-backed securities (unrelated
OTHER ASSET-to mortgage loans) that are offered to investors currently or in
BACKED      the future. The value of some mortgage-related or asset-backed se-
SECURITIES  curities in which the Funds invest may be particularly sensitive
            to changes in prevailing interest rates, and, like other fixed in-
            come investments, the ability of a Fund to successfully utilize
            these instruments may depend in part upon the ability of the Port-
            folio Manager to forecast interest rates and other economic fac-
            tors correctly.
 
            MORTGAGE PASS-THROUGH SECURITIES are securities representing in-
            terests in "pools" of mortgage loans secured by residential or
            commercial real property in which payments of both interest and
            principal on the securities are generally made monthly, in effect
            "passing through" monthly payments made by the individual borrow-
            ers on the mortgage loans which underlie the securities (net of
            fees paid to the issuer or guarantor of the securities). Early re-
            payment of principal on some mortgage-related securities (arising
            from prepayments of principal due to sale of the underlying prop-
            erty, refinancing, or foreclosure, net of fees and costs which may
            be incurred) may expose a Fund to a lower rate of return upon re-
            investment of principal. Also, if a security subject to prepayment
            has been purchased at a premium, the value of the premium would be
            lost in the event of prepayment. Like other fixed income securi-
            ties, when interest rates rise, the value of a mortgage-related
            security generally will decline; however, when interest rates are
            declining, the value of mortgage-related securities with prepay-
            ment features may not increase as much as other fixed income secu-
            rities. The rate of prepayments on underlying mortgages will af-
            fect the price and volatility of a mortgage-related security, and
            may have the effect of shortening or extending the effective matu-
            rity of the security beyond what was anticipated at the time of
            purchase. To the extent that unanticipated rates of prepayment on
            underlying mortgages increase the effective maturity of a mort-
            gage-related security, the volatility of such security can be ex-
            pected to increase.
               Payment of principal and interest on some mortgage pass-through
            securities (but not the market value of the securities themselves)
            may be guaranteed by the full faith and credit of the U.S. Govern-
            ment (in the case of securities
 
14  PIMCO Funds: Multi-Manager Series
 
<PAGE>
 
            guaranteed by the Government National Mortgage Association
            ("GNMA")); or guaranteed by agencies or instrumentalities of the
            U.S. Government (in the case of securities guaranteed by the Fed-
            eral National Mortgage Association ("FNMA") or the Federal Home
            Loan Mortgage Corporation ("FHLMC"), which are supported only by
            the discretionary authority of the U.S. Government to purchase the
            agency's obligations). Mortgage-related securities created by non-
            governmental issuers (such as commercial banks, savings and loan
            institutions, private mortgage insurance companies, mortgage bank-
            ers and other secondary market issuers) may be supported by vari-
            ous forms of insurance or guarantees, including individual loan,
            title, pool and hazard insurance and letters of credit, which may
            be issued by governmental entities, private insurers or the mort-
            gage poolers.
 
            COLLATERALIZED MORTGAGE OBLIGATIONS ("CMOs") are hybrid mortgage-
            related instruments. Similar to a bond, interest and pre-paid
            principal on a CMO are paid, in most cases, on a monthly basis.
            CMOs may be collateralized by whole mortgage loans but are more
            typically collateralized by portfolios of mortgage pass-through
            securities guaranteed by GNMA, FHLMC, or FNMA. CMOs are structured
            into multiple classes, with each class bearing a different stated
            maturity. Monthly payments of principal, including prepayments,
            are first returned to investors holding the shortest maturity
            class; investors holding the longer maturity classes receive prin-
            cipal only after the first class has been retired. CMOs that are
            issued or guaranteed by the U.S. Government or by any of its agen-
            cies or instrumentalities will be considered U.S. Government secu-
            rities by a Fund, while other CMOs, even if collateralized by U.S.
            Government securities, will have the same status as other pri-
            vately issued securities for purposes of applying a Fund's diver-
            sification tests.
 
            COMMERCIAL MORTGAGE-BACKED SECURITIES include securities that re-
            flect an interest in, and are secured by, mortgage loans on com-
            mercial real property. The market for commercial mortgage-backed
            securities developed more recently and in terms of total outstand-
            ing principal amount of issues is relatively small compared to the
            market for residential single-family mortgage-backed securities.
            Many of the risks of investing in commercial mortgage-backed secu-
            rities reflect the risks of investing in the real estate securing
            the underlying mortgage loans. These risks reflect the effects of
            local and other economic conditions on real estate markets, the
            ability of tenants to make loan payments, and the ability of a
            property to attract and retain tenants. Commercial mortgage-backed
            securities may be less liquid and exhibit greater price volatility
            than other types of mortgage-related or asset-backed securities.
 
            MORTGAGE-RELATED SECURITIES include securities other than those
            described above that directly or indirectly represent a participa-
            tion in, or are secured by and payable from, mortgage loans on
            real property, such as CMO residuals or stripped mortgage-backed
            securities ("SMBS"), and may be structured in classes with rights
            to receive varying proportions of principal and interest.
               A common type of SMBS will have one class receiving some of the
            interest and most of the principal from the mortgage assets, while
            the other class will receive most of the interest and the remain-
            der of the principal. In the most extreme case, one class will re-
            ceive all of the interest (the interest-only, or "IO" class),
            while the other class will receive all of the principal (the prin-
            cipal-only, or "PO" class). The yield to maturity on an IO class
            is extremely sensitive to the rate of principal payments (includ-
            ing prepayments) on the related underlying mortgage assets, and a
            rapid rate of principal payments may have a material adverse ef-
            fect on a Fund's yield to maturity from these securities. For a
            discussion of the characteristics of some of these instruments,
            see the Statement of Additional Information.
 
CONVERTIBLE Many of the Funds may invest in convertible securities. Convert-
SECURITIES  ible securities are generally preferred stocks or fixed income se-
            curities that are convertible into common stock at either a stated
            price or a stated rate. The price of the convertible security will
            normally vary in some proportion to changes in the price of the
            underlying common stock because of this conversion feature. A con-
            vertible security will normally also provide a fixed income
            stream. For this reason, the convertible security may not decline
            in price as rapidly as the underlying common stock.
               A Fund's Portfolio Manager will select convertible securities
            to be purchased by the Fund based primarily upon its evaluation of
            the fundamental investment characteristics and growth prospects of
            the issuer of the security. As a fixed income security, a convert-
            ible security tends to increase in market value when interest
            rates decline and to

 
                                              November 1, 1998 Prospectus  15
<PAGE>
 
            decrease in value when interest rates rise. While convertible se-
            curities generally offer lower interest or dividend yields than
            non-convertible fixed income securities of similar quality, their
            value tends to increase as the market value of the underlying
            stock increases and to decrease when the value of the underlying
            stock decreases.
               The Renaissance Fund may invest in so-called "synthetic con-
            vertible securities," which are composed of two or more different
            securities whose investment characteristics, taken together, re-
            semble those of convertible securities. For example, the Renais-
            sance Fund may purchase a non-convertible debt security and a war-
            rant or option. The synthetic convertible differs from the true
            convertible security in several respects. Unlike a true convert-
            ible security, which is a single security having a unitary market
            value, a synthetic convertible comprises two or more separate se-
            curities, each with its own market value. Therefore, the "market
            value" of a synthetic convertible is the sum of the values of its
            fixed income component and its convertible component. For this
            reason, the values of a synthetic convertible and a true convert-
            ible security may respond differently to market fluctuations.
 
RISKS OF    The Renaissance Fund may invest a portion of its assets in fixed
HIGH YIELD  income securities rated lower than Baa by Moody's or lower than
SECURITIES  BBB by S&P but rated at least B by Moody's or S&P or, if not rat-
("JUNK      ed, determined by the Portfolio Manager to be of comparable quali-
BONDS")     ty. In addition, the Renaissance Fund may invest in convertible
            securities rated below B by Moody's or S&P (or, if unrated, con-
            sidered by the Portfolio Manager to be of comparable quality). Se-
            curities rated lower than Baa by Moody's or lower than BBB by S&P
            are sometimes referred to as "high yield" or "junk" bonds. Invest-
            ors should consider the risks associated with high yield securi-
            ties before investing in this Fund. Although the Renaissance Fund
            reserves the right to do so at any time, as of the date of this
            Prospectus, it does not invest or have the present intention to
            invest more than 5% of its assets in high yield securities or junk
            bonds.
               Investing in high yield securities involves special risks in
            addition to the risks associated with investments in higher rated
            fixed income securities. While offering a greater potential oppor-
            tunity for capital appreciation and higher yields than investments
            in higher rated debt securities, high yield securities typically
            entail greater potential price volatility and may be less liquid
            than investment grade debt. High yield securities may be regarded
            as predominately speculative with respect to the issuer's continu-
            ing ability to meet principal and interest payments. Analysis of
            the creditworthiness of issuers of high yield securities may be
            more complex than for issuers of higher quality debt securities,
            and achievement of a Fund's investment objective may, to the ex-
            tent of its investments in high yield securities, depend more
            heavily on the Portfolio Manager's creditworthiness analysis than
            would be the case if the Fund were investing in higher quality se-
            curities. High yield securities may be more susceptible to real or
            perceived adverse economic and competitive industry conditions
            than higher grade securities.
               For additional discussion of the characteristics of lower rated
            fixed income securities, see the Statement of Additional Informa-
            tion. Ratings assigned to fixed income securities are described in
            the Appendix to the Statement of Additional Information.
 
DERIVATIVE  To the extent permitted by the investment objective and policies
INSTRUMENTS of each Fund, a Fund may purchase and write call and put options
            on securities, securities indexes and foreign currencies, and en-
            ter into futures contracts and use options on futures contracts as
            further described below. In pursuit of their investment objec-
            tives, the Renaissance, Tax-Efficient Equity and Innovation Funds
            may engage in the purchase and writing of call and put options on
            securities and securities indexes and enter into futures contracts
            and options thereon, including securities index futures contracts
            and options thereon. The Funds that may invest in foreign-currency
            denominated securities may engage in the purchase and writing of
            call and put options on foreign currencies. The Funds may (but are
            not required to) use these techniques to hedge against changes in
            interest rates, foreign currency exchange rates or securities
            prices. Each Fund will segregate assets determined to be liquid by
            the Adviser or a Portfolio Manager in accordance with procedures
            established by the Board of Trustees (or, as permitted by applica-
            ble regulation, enter into certain offsetting positions) to cover
            its obligations under options and futures to limit leveraging of
            the Fund.

 
16  PIMCO Funds: Multi-Manager Series

<PAGE>
 
               Derivative instruments are considered for these purposes to
            consist of securities or other instruments whose value is derived
            from or related to the value of some other instrument or asset,
            and not to include those securities whose payment of principal
            and/or interest depend upon cash flows from underlying assets,
            such as mortgage-related or asset-backed securities. See "Mort-
            gage-Related and Other Asset-Backed Securities." The value of some
            derivative instruments in which the Funds may invest may be par-
            ticularly sensitive to changes in prevailing interest rates, and,
            like the other investments of the Funds, the ability of a Fund to
            successfully utilize these instruments may depend in part upon the
            ability of the Portfolio Manager to forecast interest rates and
            other economic factors correctly. If the Portfolio Manager incor-
            rectly forecasts such factors and has taken positions in deriva-
            tive instruments contrary to prevailing market trends, the Funds
            could be exposed to the risk of loss.
               The Funds might not employ any of the strategies described be-
            low, and no assurance can be given that any strategy used will
            succeed. If the Portfolio Manager incorrectly forecasts interest
            rates, market values or other economic factors in utilizing a de-
            rivatives strategy for a Fund, the Fund might have been in a bet-
            ter position if it had not entered into the transaction at all.
            Also, suitable derivative transactions may not be available in all
            circumstances. The use of these strategies involves certain spe-
            cial risks, including a possible imperfect correlation, or even no
            correlation, between price movements of derivative instruments and
            price movements of related investments. While some strategies in-
            volving derivative instruments can reduce the risk of loss, they
            can also reduce the opportunity for gain or even result in losses
            by offsetting favorable price movements in related investments or
            otherwise, due to the possible inability of a Fund to purchase or
            sell a portfolio security at a time that would be favorable or the
            possible need to sell a portfolio security at a disadvantageous
            time because the Fund is required to maintain asset coverage or
            offsetting positions in connection with transactions in derivative
            instruments, and the possible inability of a Fund to close out or
            to liquidate its derivatives positions. In addition, a Fund's use
            of such instruments may cause the Fund to realize higher amounts
            of short-term capital gains (generally taxed at ordinary income
            tax rates) than if it had not used such instruments.
 
            OPTIONS ON SECURITIES, SECURITIES INDEXES AND CURRENCIES Certain
            Funds may purchase put options on securities. One purpose of pur-
            chasing put options is to protect holdings in an underlying or re-
            lated security against a substantial decline in market value.
            These Funds may also purchase call options on securities. One pur-
            pose of purchasing call options is to protect against substantial
            increases in prices of securities the Fund intends to purchase
            pending its ability to invest in such securities in an orderly
            manner. A Fund may sell put or call options it has previously pur-
            chased, which could result in a net gain or loss depending on
            whether the amount realized on the sale is more or less than the
            premium and other transaction costs paid on the put or call option
            which is sold. A Fund may write a call or put option only if the
            option is "covered" by the Fund holding a position in the under-
            lying securities or by other means which would permit immediate
            satisfaction of the Fund's obligation as writer of the option.
            Prior to exercise or expiration, an option may be closed out by an
            offsetting purchase or sale of an option of the same series.
               The purchase and writing of options involves certain risks.
            During the option period, the covered call writer has, in return
            for the premium on the option, given up the opportunity to profit
            from a price increase in the underlying security above the exer-
            cise price, but, as long as its obligation as a writer continues,
            has retained the risk of loss should the price of the underlying
            security decline. The writer of an option has no control over the
            time when it may be required to fulfill its obligation as a writer
            of the option. Once an option writer has received an exercise no-
            tice, it cannot effect a closing purchase transaction in order to
            terminate its obligation under the option and must deliver the un-
            derlying security at the exercise price. If a put or call option
            purchased by the Fund is not sold when it has remaining value, and
            if the market price of the underlying security remains equal to or
            greater than the exercise price (in the case of a put), or remains
            less than or equal to the exercise price (in the case of a call),
            the Fund will lose its entire investment in the option. Also,
            where a put or call option on a particular security is purchased
            to hedge against price movements in a related security, the price
            of the put or call option may move more or less than the price of
            the related security. There can be no assurance that a liquid mar-
            ket will exist when a Fund seeks to close out an option

 
                                             November 1, 1998 Prospectus  17
<PAGE>
 
            position. Furthermore, if trading restrictions or suspensions are
            imposed on the options markets, a Fund may be unable to close out
            a position.
               For each of the Renaissance and Innovation Funds, in the case
            of a written call option on a securities index, the Fund will own
            corresponding securities whose historic volatility correlates with
            that of the index.
               Over-the-counter options in which certain Funds may invest dif-
            fer from traded options in that they are two-party contracts, with
            price and other terms negotiated between buyer and seller, and
            generally do not have as much market liquidity as exchange-traded
            options. The Funds may be required to treat as illiquid over-the-
            counter options purchased and securities being used to cover cer-
            tain written over-the-counter options.
 
            SWAP AGREEMENTS The Tax-Efficient Equity Fund may enter into eq-
            uity index swap agreements for purposes of gaining exposure to the
            stocks making up an index of securities without actually purchas-
            ing those stocks. Swap agreements are two-party contracts entered
            into primarily by institutional investors for periods ranging from
            a few weeks to more than one year. In a standard swap transaction,
            two parties agree to exchange the returns (or differentials in
            rates of return) earned or realized on particular predetermined
            investments or instruments, which may be adjusted for an interest
            factor. The gross returns to be exchanged or "swapped" between the
            parties are generally calculated with respect to a "notional
            amount," i.e., the return on or increase in value of a particular
            dollar amount invested at a particular interest rate, or in a
            "basket" of securities representing a particular index.
               Most swap agreements entered into by the Fund calculate the ob-
            ligations of the parties to the agreement on a "net basis." Conse-
            quently, the Fund's current obligations (or rights) under a swap
            agreement will generally be equal only to the net amount to be
            paid or received under the agreement based on the relative values
            of the positions held by each party to the agreement (the "net
            amount"). The Fund's current obligations under a swap agreement
            will be accrued daily (offset against amounts owed to the Fund),
            and any accrued but unpaid net amounts owed to a swap counterparty
            will be covered by the segregation of assets determined to be liq-
            uid by the Portfolio Manager in accordance with procedures estab-
            lished by the Board of Trustees to limit any potential leveraging
            of the Fund's portfolio. Obligations under swap agreements so cov-
            ered will not be construed to be "senior securities" for purposes
            of the Fund's investment restriction concerning senior securities.
            The Fund will not enter into a swap agreement with any single
            party if the net amount owed or to be received under existing con-
            tracts with that party would exceed 5% of the Fund's assets.
               Whether the Fund's use of swap agreements will be successful in
            furthering its investment objective will depend on the Portfolio
            Manager's ability to predict correctly whether certain types of
            investments are likely to produce greater returns than other in-
            vestments. Because they are two-party contracts and because they
            may have terms of greater than seven days, swap agreements may be
            considered to be illiquid investments. Moreover, the Fund bears
            the risk of loss of the amount expected to be received under a
            swap agreement in the event of the default or bankruptcy of a swap
            agreement counterparty. The Fund will enter into swap agreements
            only with counterparties that meet certain standards for credit-
            worthiness (generally, such counterparties would have to be eligi-
            ble counterparties under the terms of the Fund's repurchase agree-
            ment guidelines). The swaps market is a relatively new market and
            is largely unregulated. It is possible that developments in the
            swaps market, including potential government regulation, could ad-
            versely affect the Fund's ability to terminate existing swap
            agreements or to realize amounts to be received under such agree-
            ments.
 
            FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS Certain Funds
            may enter into futures contracts and options thereon. These Funds
            may engage in such futures transactions as an adjunct to their se-
            curities activities.
               There are several risks associated with the use of futures and
            futures options for hedging purposes. There can be no guarantee
            that there will be a correlation between price movements in the
            hedging vehicle and in the portfolio securities being hedged. An
            incorrect correlation could result in a loss on both the hedged
            securities in a Fund and the hedging vehicle, so that the portfo-
            lio return might have been greater had hedging not been attempted.
            There can be no assurance that a liquid market will exist at a
            time when a Fund seeks to close out a futures contract or a
            futures
 

18  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            option position. Most futures exchanges and boards of trade limit
            the amount of fluctuation permitted in futures contract prices
            during a single day; once the daily limit has been reached on a
            particular contract, no trades may be made that day at a price be-
            yond that limit. In addition, certain of these instruments are
            relatively new and without a significant trading history. As a re-
            sult, there is no assurance that an active secondary market will
            develop or continue to exist. Lack of a liquid market for any rea-
            son may prevent a Fund from liquidating an unfavorable position,
            and the Fund would remain obligated to meet margin requirements
            until the position is closed.
 
            INDEX FUTURES The Renaissance, Tax-Efficient Equity and Innovation
            Funds may purchase and sell futures contracts on various securi-
            ties indexes ("Index Futures") and related options for hedging
            purposes and for investment purposes. A Fund's purchase and sale
            of Index Futures is limited to contracts and exchanges which have
            been approved by the Commodity Futures Trading Commission
            ("CFTC").
               A Fund may close open positions on the futures exchanges on
            which Index Futures are traded at any time up to and including the
            expiration day. All positions which remain open at the close of
            the last business day of the contract's life are required to set-
            tle on the next business day (based upon the value of the relevant
            index on the expiration day), with settlement made with the appro-
            priate clearing house. Because the specific procedures for trading
            foreign stock Index Futures on futures exchanges are still under
            development, additional or different margin requirements as well
            as settlement procedures may be applicable to foreign stock Index
            Futures at the time a Fund purchases such instruments.
               Positions in Index Futures may be closed out by a Fund only on
            the futures exchange upon which the Index Futures are then traded.
            There can be no assurance that a liquid market will exist for any
            particular contract at any particular time. Also, the price of In-
            dex Futures may not correlate perfectly with movement in the rele-
            vant index due to certain market distortions. First, all partici-
            pants in the futures market are subject to margin deposit and
            maintenance requirements. Rather than meeting additional margin
            deposit requirements, investors may close futures contracts
            through offsetting transactions which could distort the normal re-
            lationship between the index and futures markets. Second, the de-
            posit requirements in the futures market are less onerous than
            margin requirements in the securities market, and as a result, the
            futures market may attract more speculators than does the securi-
            ties market. Increased participation by speculators in the futures
            market may also cause temporary price distortions. In addition,
            trading hours for foreign stock Index Futures may not correspond
            perfectly to hours of trading on the foreign exchange to which a
            particular foreign stock Index Future relates. This may result in
            a disparity between the price of Index Futures and the value of
            the relevant index due to the lack of continuous arbitrage between
            the Index Futures price and the value of the underlying index.
               The Funds may only enter into futures contracts or futures op-
            tions which are standardized and traded on a U.S. or foreign ex-
            change or board of trade, or similar entity, or quoted on an auto-
            mated quotation system. Each Fund may use financial futures con-
            tracts and related options only for "bona fide hedging" purposes,
            as such term is defined in applicable regulations of the CFTC, or,
            with respect to positions in financial futures and related options
            that do not qualify as "bona fide hedging" positions, may enter
            such positions only to the extent that aggregate initial margin
            deposits plus premiums paid by it for open futures option posi-
            tions, less the amount by which any such positions are "in-the-
            money," would not exceed 5% of the Fund's net assets.
 
LOANS OF    For the purpose of achieving income, each Fund may lend its port-
PORTFOLIO   folio securities to brokers, dealers, and other financial institu-
SECURITIES  tions, provided:
               (i)   the loan is secured continuously by collateral consisting
                     of U.S. Government securities, cash or cash equivalents
                     (negotiable certificates of deposit, bankers' acceptances
                     or letters of credit) maintained on a daily mark-to-market
                     basis in an amount at least equal to the current market
                     value of the securities loaned;
               (ii)  the Fund may at any time call the loan and obtain the
                     return of the securities loaned;
               (iii) the Fund will receive any interest or dividends paid on
                     the loaned securities; and
               (iv)  the aggregate market value of securities loaned will not
                     at any time exceed the Fund's limitation on lending its
                     portfolio securities.
 

                                               November 1, 1998 Prospectus  19
<PAGE>
 
            Each Fund's performance will continue to reflect changes in the
            value of the securities loaned and will also reflect the receipt
            of either interest, through investment of cash collateral by the
            Fund in permissible investments, or a fee, if the collateral is
            U.S. Government securities. Securities lending involves the risk
            of loss of rights in the collateral or delay in recovery of the
            collateral should the borrower fail to return the security loaned
            or become insolvent. The Funds may pay lending fees to the party
            arranging the loan.
 
 
SHORT SALES Each Fund may from time to time make short sales involving securi-
            ties held in the Fund's portfolio or which the Fund has the right
            to acquire without the payment of further consideration. For these
            purposes, a Fund may also hold or have the right to acquire secu-
            rities which, without the payment of any further consideration,
            are convertible into or exchangeable for the securities sold
            short. Short sales expose the Fund to the risk that it will be re-
            quired to acquire, convert or exchange securities to cover its
            short position at a time when the securities sold short have ap-
            preciated in value, thus resulting in a loss to the Fund.
 
 
WHEN-       Each Fund may purchase securities which it is eligible to purchase
ISSUED,     on a when-issued basis, may purchase and sell such securities for
DELAYED     delayed delivery and may make contracts to purchase such securi-
DELIVERY    ties for a fixed price at a future date beyond normal settlement
AND         time (forward commitments). When-issued transactions, delayed de-
FORWARD     livery purchases and forward commitments involve a risk of loss if
COMMITMENT  the value of the securities declines prior to the settlement date,
TRANSACTIONSwhich risk is in addition to the risk of decline in the value of
            the Fund's other assets. Typically, no income accrues on securi-
            ties a Fund has committed to purchase prior to the time delivery
            of the securities is made, although a Fund may earn income on se-
            curities it has segregated.
 
 
REPURCHASE  For the purposes of maintaining liquidity and achieving income,
AGREEMENTS  each Fund may enter into repurchase agreements, which entail the
            purchase of a portfolio-eligible security from a bank or broker-
            dealer that agrees to repurchase the security at the Fund's cost
            plus interest within a specified time (normally one day). If the
            party agreeing to repurchase should default, as a result of bank-
            ruptcy or otherwise, the Fund will seek to sell the securities
            which it holds, which action could involve procedural costs or de-
            lays in addition to a loss on the securities if their value should
            fall below their repurchase price. Those Funds whose investment
            objectives do not include the earning of income will invest in re-
            purchase agreements only as a cash management technique with re-
            spect to that portion of the portfolio maintained in cash. Each
            Fund will limit its investment in repurchase agreements maturing
            in more than seven days consistent with the Fund's policy on in-
            vestment in illiquid securities.
 
REVERSE     A reverse repurchase agreement may for some purposes be considered
REPURCHASE  borrowing that involves the sale of a security by a Fund and its
AGREEMENTS  agreement to repurchase the instrument at a specified time and
AND OTHER   price. The Fund will segregate assets determined to be liquid by
BORROWINGS  the Adviser or Portfolio Manager in accordance with procedures es-
            tablished by the Board of Trustees to cover its obligations under
            reverse repurchase agreements. Reverse repurchase agreements will
            be subject to the Funds' limitations on borrowings. A Fund also
            may borrow money for investment purposes subject to any policies
            of the Fund currently described in this Prospectus or in the
            Statement of Additional Information. Such a practice will result
            in leveraging of a Fund's assets. Leverage will tend to exaggerate
            the effect on net asset value of any increase or decrease in the
            value of a Fund's portfolio and may cause a Fund to liquidate
            portfolio positions when it would not be advantageous to do so.
 
PORTFOLIO   The length of time a Fund has held a particular security is not
TURNOVER    generally a consideration in investment decisions. The investment
            policies of a Fund may lead to frequent changes in the Fund's in-
            vestments, particularly in periods of volatile market movements. A
            change in the securities held by a Fund is known as "portfolio
            turnover." High portfolio turnover (e.g., over 100%) involves cor-
            respondingly greater expenses to a Fund, including brokerage com-
            missions or dealer mark-ups and other transaction costs on the
            sale of securities and reinvestments in other securities. See "Man-

 
20  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            agement of the Trust--Portfolio Transactions." Such sales may re-
            sult in realization of taxable capital gains (including short-term
            capital gains which generally are taxed at ordinary income tax
            rates). See "Taxes." The portfolio turnover rates for the Funds
            (with the exception of the Tax-Efficient Equity Fund) were as fol-
            lows for fiscal 1998 and 1997, respectively: Equity Income--45%
            and 45%; Value--77% and 71%; Renaissance--192% and 131%; Capital
            Appreciation--75% and 87%; Mid-Cap Growth--66% and 82%; and Inno-
            vation--100% and 80%. The annual portfolio turnover rate for the
            Tax-Efficient Equity Fund is expected to be less than 40%.
 
ILLIQUID    Each Fund may invest in securities that are illiquid so long as no
SECURITIES  more than 15% of the value of the Fund's net assets (taken at mar-
            ket value at the time of investment) would be invested in such se-
            curities. Certain illiquid securities may require pricing at fair
            value as determined in good faith under the supervision of the
            Board of Trustees. A Portfolio Manager may be subject to signifi-
            cant delays in disposing of illiquid securities, and transactions
            in illiquid securities may entail registration expenses and other
            transaction costs that are higher than those for transactions in
            liquid securities.
               The term "illiquid securities" for this purpose means securi-
            ties that cannot be disposed of within seven days in the ordinary
            course of business at approximately the amount at which a Fund has
            valued the securities. Illiquid securities are considered to in-
            clude, among other things, written over-the-counter options, secu-
            rities or other liquid assets being used as cover for such op-
            tions, repurchase agreements with maturities in excess of seven
            days, certain loan participation interests, fixed time deposits
            which are not subject to prepayment or provide for withdrawal pen-
            alties upon prepayment (other than overnight deposits), securities
            that are subject to legal or contractual restrictions on resale
            (such as privately placed debt securities), and other securities
            which legally or in the Adviser's or a Portfolio Manager's opinion
            may be deemed illiquid (not including securities issued pursuant
            to Rule 144A under the Securities Act of 1933 and certain commer-
            cial paper that the Adviser or a Portfolio Manager has determined
            to be liquid under procedures approved by the Board of Trustees).
 
CREDIT AND  All fixed income securities are subject to market risk and credit
MARKET RISK risk. Market risk relates to market-induced changes in a
OF          security's value, usually as a result of changes in interest
FIXEDINCOME rates. The value of a Fund's investments in fixed income securi-
SECURITIES  ties will change as the general level of interest rates fluctuate.
            During periods of falling interest rates, the value of a Fund's
            fixed income securities generally rise. Conversely, during periods
            of rising interest rates, the value of a Fund's fixed income secu-
            rities generally decline. Credit risk relates to the ability of
            the issuer to make payments of principal and interest.
 
SERVICE     Many of the services provided to the Funds depend on the smooth
SYSTEMS --  functioning of computer systems. Many systems in use today cannot
YEAR 2000   distinguish between the year 1900 and the year 2000. Should any of
PROBLEM     the service systems fail to process information properly, that
            could have an adverse impact on the Funds' operations and services
            provided to shareholders. The Adviser, Distributor, Shareholder
            Servicing and Transfer Agent, Custodian, and certain other service
            providers to the Funds have reported that each is working toward
            mitigating the risks associated with the so-called "year 2000
            problem." However, there can be no assurance that the problem will
            be corrected in all respects and that the Funds' operations and
            services provided to shareholders will not be adversely affected
            nor can there be any assurance that the year 2000 problem will not
            have an adverse effect on the entities whose securities are held
            by the Funds or on domestic or global equity markets or economies,
            generally.
 
"FUNDAMENTAL"
POLICIES    The investment objective of each of the Renaissance, Tax-Efficient
            Equity and Innovation Funds described in this Prospectus may be
            changed by the Board of Trustees without shareholder approval. The
            investment objective of each other Fund is fundamental and may not
            be changed without shareholder approval by vote of a majority of
            the outstanding shares of that Fund. If there is a change in a
            Fund's investment objective, including a change approved by share-
            holder vote, shareholders should consider whether the Fund remains
            an appropriate investment in light of their then current financial
            position and needs.

 
                                              November 1, 1998 Prospectus  21
<PAGE>
 
 
            Performance Information
 
            From time to time the Trust may make available certain information
            about the performance of the Class D shares of some or all of the
            Funds. Information about a Fund's performance is based on that
            Fund's (or its predecessor's) record to a recent date and is not
            intended to indicate future performance.
               The total return of Class D shares of all Funds may be included
            in advertisements or other written material. When a Fund's total
            return is advertised with respect to its Class D shares, it will
            be calculated for the past year, the past five years, and the past
            ten years (or if the Fund has been offered for a period shorter
            than one, five or ten years, that period will be substituted)
            since the establishment of the Fund or its predecessor series of
            PIMCO Advisors Funds, as more fully described in the Statement of
            Additional Information. For periods prior to the initial offering
            date of Class D shares, total return presentations for the class
            will be based on the historical performance of an older class of
            the Fund (if any) restated, as necessary, to reflect that there
            are no sales charges associated with Class D shares. The older
            class to be used in each case is set forth in the Statement of Ad-
            ditional Information. For these purposes, the performance of the
            older class will also be restated to reflect any different operat-
            ing expenses (such as different administrative fees and/or 12b-
            1/servicing fee charges) associated with Class D shares. In cer-
            tain cases, such a restatement will result in Class D performance
            which is higher than if the performance of the older class were
            not restated to reflect the different Class D operating expenses.
            In such cases, the Trust's advertisements will also, to the extent
            appropriate, show the lower performance figure reflecting the ac-
            tual operating expenses incurred by the older class for periods
            prior to the initial offering date of Class D shares. Total return
            is measured by comparing the value of an investment in Class D
            shares of the Fund at the beginning of the relevant period to the
            redemption value of the investment in Class D shares of the Fund
            at the end of the period (assuming immediate reinvestment of any
            dividends or capital gains distributions at net asset value). To-
            tal return may be advertised using alternative methods that re-
            flect all elements of return, but that may be adjusted to reflect
            the cumulative impact of alternative fee and expense structures,
            such as the currently effective advisory and administrative fees
            for Class D shares of the Funds.
               Quotations of yield for Class D shares of a Fund will be based
            on the investment income per share (as defined by the Securities
            and Exchange Commission) during a particular 30-day (or one-month)
            period (including dividends and interest), less expenses accrued
            during the period ("net investment income"), and will be computed
            by dividing net investment income by the maximum public offering
            price per Class D share on the last day of the period.
               The Funds may also provide current distribution information to
            its shareholders in shareholder reports or other shareholder com-
            munications, or in certain types of sales literature provided to
            prospective investors. Current distribution information for Class
            D shares of a Fund will be based on distributions for a specified
            period (i.e., total dividends from net investment income), divided
            by the net asset value per Class D share on the last day of the
            period and annualized. The rate of current distributions does not
            reflect deductions for unrealized losses from transactions in de-
            rivative instruments such as options and futures, which may reduce
            total return. Current distribution rates differ from standardized
            yield rates in that they represent what Class D shares of a Fund
            have declared and paid to shareholders as of the end of a speci-
            fied period rather than the Fund's actual net investment income
            for that period.
               The Adviser and each Portfolio Manager may also report to
            shareholders or to the public in advertisements concerning its
            performance as adviser to clients other than the Funds, and on its
            comparative performance or standing in relation to other money
            managers. Such comparative information may be compiled or provided
            by independent ratings services or by news organizations. Any per-
            formance information, whether related to the Funds, the Adviser or
            the Portfolio Managers, should be considered in light of the
            Funds' investment objectives and policies, characteristics and
            quality of the Funds, and the market conditions during the time
            period indicated, and should not be considered to be representa-
            tive of what may be achieved in the future.
               Investment results of the Funds will fluctuate over time, and
            any representation of the Funds' total return or yield for any
            prior period should not be considered as a representation of what
            an investor's total return or yield may be in any future period.
 
 
22  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            How to Buy Shares
 
            Class D shares of each Fund are continuously offered through fi-
            nancial service firms, such as broker-dealers or registered in-
            vestment advisers, with which the Trust's principal underwriter,
            PIMCO Funds Distributors LLC (the "Distributor"), has an agreement
            for the use of the Funds in particular investment products, pro-
            grams or accounts for which a fee may be charged. See "Financial
            Service Firms" below.
               You may purchase Class D shares only through your financial
            service firm. In connection with purchases, your financial service
            firm is responsible for forwarding all necessary documentation to
            the Distributor, and may charge you for such services. Investors
            who wish to purchase shares of the Funds directly from the Trust
            or the Distributor should inquire as to the other classes of
            shares. See "Description of the Trust--Multiple Classes of
            Shares."
               Class D shares may be purchased at a price equal to their net
            asset value per share next determined after receipt of an order.
            Purchase payments for Class D shares are fully invested at the net
            asset value next determined after acceptance of the trade. All
            purchase orders received by the Distributor from your financial
            service firm prior to the close of regular trading (normally 4:00
            p.m., Eastern time) on the New York Stock Exchange (the "Ex-
            change"), on a regular business day, are processed at that day's
            offering price. In addition, orders received by the Distributor
            from financial service firms after the offering price is deter-
            mined that day will receive such offering price if the orders were
            received by the firm from its customer prior to such determination
            and were transmitted to and received by the Distributor prior to
            its close of business that day (normally 7:00 p.m., Easterm time).
            Purchase orders received on other than a regular business day will
            be executed on the next succeeding regular business day.
               The Distributor, in its sole discretion, may accept or reject
            any order for purchase of Fund shares. The sale of shares will be
            suspended during any period in which the Exchange is closed for
            other than weekends or holidays, or if permitted by the rules of
            the Securities and Exchange Commission, when trading on the Ex-
            change is restricted or during an emergency which makes it imprac-
            ticable for the Funds to dispose of their securities or to deter-
            mine fairly the value of their net assets, or during any other pe-
            riod as permitted by the Securities and Exchange Commission for
            the protection of investors.
               Class D shares of the Funds will be held in your account with
            your financial service firm and, generally, your firm will hold
            your Class D shares in nominee or street name as your agent. Ac-
            cordingly, in most cases, the Trust's transfer agent will have no
            information with respect to or control over accounts of specific
            Class D shareholders and you may obtain information about your ac-
            counts only through your financial service firm. In certain cir-
            cumstances, your firm may arrange to have your shares held in your
            own name or you may subsequently become a holder of record for
            some other reason (for instance, if you terminate your relation-
            ship with your firm). In such circumstances, please contact the
            Distributor at 1-888-87-PIMCO for information about your account.
            If you wish to invest in the Funds through your own account with
            the Trust or the Distributor, please inquire as to the other clas-
            ses of shares of the Funds. See "Description of the Trust--Multi-
            ple Classes of Shares." In the interest of economy and conve-
            nience, certificates for Class D shares will not be issued.
 
FINANCIAL   Broker-dealers, registered investment advisers and other financial
SERVICE     service firms provide varying investment products, programs or ac-
FIRMS       counts, pursuant to arrangements with the Distributor, through
            which their clients may purchase and redeem Class D shares of the
            Funds. Firms will generally provide or arrange for the provision
            of some or all of the shareholder servicing and account mainte-
            nance services required by your account, including, without limi-
            tation, transfers of registration and dividend payee changes; and
            may perform functions such as generation of confirmation state-
            ments and disbursement of cash dividends. Firms may also arrange
            with their clients for other investment or administrative servic-
            es. Your firm may independently establish and charge you transac-
            tion fees and/or other additional amounts for such services, which
            charges could reduce your investment returns on Class D shares of
            the Funds.
               Your financial service firm may have omnibus accounts and simi-
            lar arrangements with the Trust and may be paid for providing sub-
            transfer agency and other services. A firm may be paid for its
            services directly or indirectly by
 

                                             November 1, 1998 Prospectus  23
<PAGE>
 
            the Funds, the Adviser or an affiliate (normally not to exceed an
            annual rate of 0.35% of a Fund's average daily net assets attrib-
            utable to its Class D shares and purchased through such firm for
            its clients). Your firm may establish various minimum investment
            requirements for Class D shares of the Funds and may also estab-
            lish certain privileges with respect to purchases, redemptions and
            exchanges of Class D shares or the reinvestment of dividends.
               This Prospectus should be read in connection with your firm's
            materials regarding its fees and services.
 
CHANGE IN   The Trust expects to change its transfer agent for its Class D
TRANSFER    shares to First Data Investor Services Group, Inc. Shareholders
AGENT       will continue to receive all of the services described in this
            Prospectus and should continue to follow the various procedures
            set forth in this Prospectus, with the exception of the address
            changes described below.
               There will be no changes in the toll-free 1-800 telephone num-
            bers set forth in this Prospectus. However, mailing addresses will
            change as follows:
 
            Old Address                              New Address
            -----------                              -----------
            Shareholder Services, Inc.               First Data Investor 
            P.O. Box 5866                            Services Group, Inc.
            Denver, CO 80217                         P.O. Box 9688
                                                     Providence, RI 02940-0926
            PIMCO Funds Distributors LLC
            P.O. Box 5866                            PIMCO Funds Distributors
            Denver, CO 80217-5866                    LLC
                                                     P.O. Box 9688   
                                                     Providence, RI 02940-0926
            Exchange Privilege 
                                                     
            A shareholder may exchange Class D shares of any Fund for Class D
            shares of any other Fund in an account with identical registration
            on the basis of their respective net asset values. Class D shares
            of each Fund may also be exchanged for Class D shares of certain
            series of PIMCO Funds: Pacific Investment Management Series, an
            affiliated mutual fund family composed primarily of fixed income
            portfolios managed by Pacific Investment Management Company, an
            affiliate of the Adviser. There are currently no exchange fees or
            charges imposed by the Trust, although your financial service firm
            may impose various fees and charges, investment minimums and other
            requirements with respect to exchanges. Please contact your finan-
            cial service firm for details. An exchange will constitute a tax-
            able sale for federal income tax purposes.
               The Trust reserves the right to refuse exchange purchases if,
            in the judgment of the Adviser, the purchase would adversely af-
            fect a Fund and its shareholders. In particular, a pattern of ex-
            changes characteristic of "market-timing" strategies may be deemed
            by the Adviser to be detrimental to the Trust or a particular
            Fund. Currently, the Trust limits the number of "round trip" ex-
            changes an investor may make. An investor makes a "round trip" ex-
            change when the investor purchases shares of a particular Fund,
            subsequently exchanges those shares for shares of a different Fund
            and then exchanges back into the originally purchased Fund. The
            Trust has the right to refuse any exchange for any investor who
            completes (by making the exchange back into the shares of the
            originally purchased Fund) more than six round trip exchanges in
            any twelve-month period. Although the Trust has no current inten-
            tion of terminating or modifying the exchange privilege other than
            as set forth in the preceding sentence, it reserves the right to
            do so at any time. Except as otherwise permitted by Securities and
            Exchange Commission regulations, the Trust will give 60 days' ad-
            vance notice to your financial service firm of any termination or
            material modification of the exchange privilege. For further in-
            formation about exchange privileges, please contact your financial
            service firm.
 

24  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            How to Redeem
 
            Class D shares may be redeemed through your financial service firm
            on any day the Exchange is open. Shares are redeemed at their net
            asset value next determined after a proper redemption request has
            been received from your firm. There is no charge by the Trust or
            the Distributor with respect to a redemption, although your finan-
            cial service firm may charge you for its services in processing
            your redemption request. Please contact your firm for details. If
            you are the holder of record of your Class D shares, you may con-
            tact the Distributor at 1-888-87-PIMCO for information regarding
            how to redeem your shares directly from the Trust.
               Your financial service firm is obligated to transmit your re-
            demption orders to the Distributor promptly and is responsible for
            ensuring that your redemption request is in proper form. Requests
            for redemption received by financial service firms prior to the
            close of regular trading (normally 4:00 p.m., Eastern time) on the
            Exchange on a regular business day and received by the Distributor
            prior to the close of the Distributor's business day will be con-
            firmed at the net asset value effective as of the closing of the
            Exchange on that day. Your financial service firm will be respon-
            sible for furnishing all necessary documentation to the Distribu-
            tor or the Trust's transfer agent and may charge you for its serv-
            ices. Redemption proceeds will be forwarded to your financial
            service firm as promptly as possible and in any event within seven
            days after the redemption request is received by the Distributor
            in good order. Under unusual circumstances, the Trust may suspend
            redemptions or postpone payment for more than seven days, as per-
            mitted by federal securities law.
 
REDEMPTIONS The Trust agrees to redeem shares of each Fund solely in cash up
IN KIND     to the lesser of $250,000 or 1% of the Fund's net assets during
            any 90-day period for any one shareholder. In consideration of the
            best interests of the remaining shareholders, the Trust reserves
            the right to pay any redemption proceeds exceeding this amount in
            whole or in part by a distribution in kind of securities held by a
            Fund in lieu of cash. Except for Funds with a tax-efficient
            management strategy, it is highly unlikely that shares would ever be
            redeemed in kind. When shares are redeemed in kind, the redeeming
            shareholder should expect to incur transaction costs upon the
            disposition of the se-curities received in the distribution.
 
            Distributor
 
            PIMCO Funds Distributors LLC (the "Distributor"), a wholly owned
            subsidiary of the Adviser, is the principal underwriter of the
            Trust's shares. Pursuant to a Distribution Agreement with the
            Trust, with respect to each Fund's Class D shares, the Distributor
            may bear various expenses, including the cost of printing and
            mailing prospectuses to persons other than current shareholders.
            The Distributor, located at 2187 Atlantic Street, Stamford, Con-
            necticut 06902, is a broker-dealer registered with the SEC.
 
            How Net Asset Value Is Determined
 
            The net asset value of Class D shares of each Fund of the Trust
            will be determined once on each day on which the Exchange is open
            (a "Business Day"), as of the close of regular trading (normally
            4:00 p.m., Eastern time) on the Exchange. Net asset value will not
            be determined on days on which the Exchange is closed.
               Portfolio securities and other assets for which market quota-
            tions are readily available are stated at market value. Fixed in-
            come securities are normally valued on the basis of quotations ob-
            tained from brokers and dealers or pricing services, which take
            into account appropriate factors such as institutional-sized trad-
            ing in similar groups of securities, yield, quality, coupon rate,
            maturity, type of issue, trading characteristics, and other market
            data. Certain fixed income
 
                                               November 1, 1998 Prospectus  25
<PAGE>
 
            securities for which daily market quotations are not readily
            available may be valued, pursuant to guidelines established by the
            Board of Trustees, with reference to fixed income securities whose
            prices are more readily obtainable and whose durations are compa-
            rable to the securities being valued. Short-term investments hav-
            ing a maturity of 60 days or less are valued at amortized cost,
            when the Board of Trustees determines that amortized cost is their
            fair value. Exchange- traded options, futures and options on
            futures are valued at the settlement price as determined by the
            appropriate clearing corporation. All other securities and assets
            are valued at their fair value as determined in good faith by the
            Trustees or by persons acting at their direction.
               Quotations of foreign securities in foreign currency are con-
            verted to U.S. dollar equivalents using foreign exchange quota-
            tions received from independent dealers. Under the Trust's proce-
            dures, the prices of foreign securities are determined using in-
            formation derived from pricing services and other sources. Infor-
            mation that becomes known to the Trust or its agents after the
            time that net asset value is calculated on any Business Day may be
            assessed in determining net asset value per share after the time
            of receipt of the information, but will not be used to retroac-
            tively adjust the price of the security so determined earlier or
            on a prior day. Events affecting the values of portfolio securi-
            ties that occur between the time their prices are determined and
            the close of regular trading on the Exchange (normally 4:00 p.m.,
            Eastern time) may not be reflected in the calculation of net asset
            value. If events materially affecting the value of such securities
            occur during such period, then these securities may be valued at
            fair value as determined by the Adviser or a Portfolio Manager and
            approved in good faith by the Board of Trustees.
               Each Fund's liabilities are allocated among its classes. The
            total of such liabilities allocated to a class plus that class's
            distribution and/or servicing fees and any other expenses spe-
            cially allocated to that class are then deducted from the class's
            proportionate interest in the Fund's assets, and the resulting
            amount for each class is divided by the number of shares of that
            class outstanding to produce the class's "net asset value" per
            share. Generally, for Funds that pay income dividends, those divi-
            dends are expected to differ over time by approximately the amount
            of the expense accrual differential between a particular Fund's
            classes.
 
            Distributions
 
            Shares begin earning dividends on the day after the date that
            funds are received by the Trust for the purchase of Class D
            shares. Net investment income from interest and dividends, if any,
            will be declared and paid quarterly to shareholders of record by
            the Equity Income, Value and Renaissance Funds. Net investment
            income from interest and dividends, if any, will be declared and
            paid at least annually to shareholders of record by the Tax-
            Efficient Equity, Capital Appreciation, Mid-Cap Growth and
            Innovation Funds. Any net capital gains from the sale of portfolio
            securities will be distributed no less frequently than once
            annually. Net short-term capital gains may be paid more
            frequently.
               All dividends and/or distributions will be paid in the form of
            additional Class D shares of the Fund to which the dividends
            and/or distributions relate or, at the election of the sharehold-
            er, of another Fund or other series of the Trust or of PIMCO
            Funds: Pacific Investment Management Series as described below, at
            net asset value, unless the shareholder elects to receive cash
            (either paid to shareholders directly or credited to their account
            with their financial services firm). If a shareholder has elected
            to receive dividends and/or capital gain distributions in cash and
            the postal or other delivery service is unable to deliver checks
            to the shareholder's address of record, such shareholder's distri-
            butions will automatically be invested in the Money Market Fund of
            PIMCO Funds: Pacific Investment Management Series, until such
            shareholder is located. Dividends paid by each Fund with respect
            to each class of shares are calculated in the same manner and at
            the same time.
               Your financial service firm may offer a program pursuant to
            which you may elect to invest dividends and/or distributions paid
            by any Fund in Class D shares of any other Fund or series of PIMCO
            Funds: Pacific Investment Management Series which offers Class D
            shares. Please contact your financial service firm for details.
 
26  PIMCO Funds: Multi-Manager Series

<PAGE>
 
 
            Taxes
 
            Each Fund intends to qualify as a regulated investment company an-
            nually and to elect to be treated as a regulated investment com-
            pany under the Internal Revenue Code of 1986, as amended (the
            "Code"). As such, a Fund generally will not pay federal income tax
            on the income and gains it pays as dividends to its shareholders.
            In order to avoid a 4% federal excise tax, each Fund intends to
            distribute each year substantially all of its net income and
            gains.
               Shareholders subject to U.S. federal income tax will be subject
            to tax on dividends received from a Fund, regardless of whether
            received in cash or reinvested in additional shares. Distributions
            received by tax-exempt shareholders generally will not be subject
            to federal income tax to the extent permitted under applicable tax
            law. All shareholders must treat dividends, other than capital
            gain dividends, exempt-interest dividends and dividends that rep-
            resent a return of capital to shareholders, as ordinary income. In
            particular, distributions derived from short-term gains will be
            treated as ordinary income. Dividends designated by a Fund as cap-
            ital gain dividends derived from the Fund's net capital gains
            (that is, the excess of its net long-term capital gains over its
            net short-term capital losses) are taxable to shareholders as
            long-term capital gain (generally subject to a 20% tax rate) ex-
            cept as provided by an applicable tax exemption. Any distributions
            that are not from a Fund's net investment income or net capital
            gain may be characterized as a return of capital to shareholders
            or, in some cases, as capital gain. Certain dividends declared in
            October, November or December of a calendar year are taxable to
            shareholders (who otherwise are subject to tax on dividends) as
            though received on December 31 of that year if paid to
            shareholders during January of the following calendar year. Each
            Fund will advise shareholders annually of the amount and nature of
            the dividends paid to them. Dividends derived from interest on
            certain U.S. Government securities may be exempt from state and
            local taxes, although interest on mortgage-backed U.S. Government
            securities is generally not so exempt. While the Tax-Efficient Eq-
            uity Fund seeks to minimize taxable distributions, the Fund may be
            expected to earn and distribute taxable income and may also be ex-
            pected to realize and distribute capital gains from time to time.
               Current federal tax law requires the holder of a U.S. Treasury
            or other fixed income zero-coupon security to accrue as income
            each year a portion of the discount at which the security was pur-
            chased, even though the holder receives no interest payment in
            cash on the security during the year. In addition, pay-in-kind se-
            curities will give rise to income which is required to be distrib-
            uted and is taxable even though the Fund holding the security re-
            ceives no interest payment in cash on the security during the
            year. Also, a portion of the yield on certain high yield securi-
            ties (including certain pay-in-kind securities) issued after July
            10, 1989 may be treated as dividends. Accordingly, each Fund that
            holds the foregoing kinds of securities may be required to pay out
            as an income distribution each year an amount which is greater
            than the total amount of cash interest the Fund actually received.
            Such distributions may be made from the cash assets of the Fund or
            by liquidation of portfolio securities, if necessary. The Fund may
            realize gains or losses from such liquidations. In the event the
            Fund realizes net capital gains from such transactions, its share-
            holders may receive a larger capital gain distribution, if any,
            than they would in the absence of such transactions.
               Taxable shareholders should note that the timing of their in-
            vestment or redemptions could have undesirable tax consequences.
            Dividends and distributions on a Fund's shares are generally sub-
            ject to federal income tax as described herein to the extent they
            do not exceed the Fund's realized income and gains, even though
            such dividends and distributions may economically represent a re-
            turn of a particular shareholder's investment. Such distributions
            are likely to occur in respect of shares purchased at a time when
            the Fund's net asset value reflects gains that are either
            unrealized or realized but not distributed. Such realized gains
            may be required to be distributed even when a Fund's net asset
            value also reflects unrealized losses. If shares are redeemed be-
            fore payment of an exempt-interest dividend, shareholders may re-
            alize a taxable capital gain, whereas by waiting and receiving the
            exempt-interest dividend, a portion of their share value would
            have been received in the form of tax-free income.
               The preceding discussion relates only to federal income tax;
            the consequences under other tax laws may differ. Shareholders
            should consult their tax advisers as to the possible application
            of foreign, state and local income tax laws
 

                                               November 1, 1998 Prospectus  27
<PAGE>
 
            to Trust dividends and capital gain distributions. For additional
            information relating to the tax aspects of investing in a Fund,
            see the Statement of Additional Information.
 
            Management of the Trust
 
            The business affairs of the Trust are managed under the direction
            of the Board of Trustees. Information about the Trustees and the
            Trust's executive officers may be found in the Statement of Addi-
            tional Information under the heading "Management of the Trust."
 
INVESTMENT  PIMCO ADVISORS serves as investment adviser to the Funds pursuant
ADVISER     to an investment advisory agreement with the Trust. PIMCO Advisors
            is a Delaware limited partnership organized in 1987. PIMCO Advi-
            sors provides investment management and advisory services to pri-
            vate accounts of institutional and individual clients and to mu-
            tual funds. Total assets under management by PIMCO Advisors and
            its subsidiary partnerships as of September 30, 1998 were approxi-
            mately $225.9 billion. The general partners of PIMCO Advisors are
            PIMCO Partners, G.P. and PIMCO Advisors Holdings L.P. ("PAH").
            PIMCO Partners, G.P. is a general partnership between PIMCO Hold-
            ing LLC, a Delaware limited liability company and an indirect
            wholly-owned subsidiary of Pacific Life Insurance Company, and
            PIMCO Partners LLC, a California limited liability company con-
            trolled by the current Managing Directors and two former Managing
            Directors of Pacific Investment Management Company. PIMCO Part-
            ners, G.P. is the sole general partner of PAH. PIMCO Advisors is
            governed by a Management Board, which exercises substantially all
            of the governance powers of the general partner and serves as the
            functional equivalent of a board of directors. PIMCO Advisors' ad-
            dress is 800 Newport Center Drive, Newport Beach, California
            92660. PIMCO Advisors is registered as an investment adviser with
            the Securities and Exchange Commission. PIMCO Advisors currently
            has seven subsidiary investment adviser partnerships, the follow-
            ing four of which manage one or more of the Funds: Cadence, Colum-
            bus Circle, NFJ and Parametric.
               Under the investment advisory agreement, PIMCO Advisors, sub-
            ject to the supervision of the Board of Trustees, is responsible
            for providing advice and guidance with respect to the Funds and
            for managing, either directly or through others selected by the
            Adviser, the investment of the Funds. PIMCO Advisors also fur-
            nishes to the Board of Trustees periodic reports on the investment
            performance of each Fund.
 
PORTFOLIO   Pursuant to portfolio management agreements, PIMCO Advisors em-
MANAGERS    ploys Portfolio Managers to provide investment advisory services
            to all of the Funds. Each Portfolio Manager is an affiliate of
            PIMCO Advisors. PIMCO Advisors (and not the Funds or the Trust)
            compensates the Portfolio Managers from its advisory fee. Under
            these agreements, a Portfolio Manager has full investment discre-
            tion and makes all determinations with respect to the investment
            of a Fund's assets and makes all determinations respecting the
            purchase and sale of a Fund's securities and other investments. If
            a Portfolio Manager ceases to manage the portfolio of a Fund,
            PIMCO Advisors will either assume full responsibility for the man-
            agement of that Fund, or retain a new portfolio manager subject to
            the approval of the Trustees and the Fund's shareholders.
 
            CADENCE manages the Capital Appreciation and Mid-Cap Growth Funds
            (the "Cadence Funds"). Cadence is an investment management firm
            organized as a general partnership. Cadence has two partners:
            PIMCO Advisors as the supervisory partner, and Cadence Capital
            Management Inc. as the managing partner. Cadence Capital Manage-
            ment Corporation, the predecessor investment adviser to Cadence,
            commenced operations in 1988. Accounts managed by Cadence had com-
            bined assets as of September 30, 1998 of approximately $6.1 bil-
            lion. Cadence's address is Exchange Place, 53 State Street, Bos-
            ton, Massachusetts 02109. Cadence is registered as an investment
            adviser with the Securities and Exchange Commission.
 

28  PIMCO Funds: Multi-Manager Series

<PAGE>
 
               David B. Breed, William B. Bannick, Katherine A. Burdon and Pe-
            ter B. McManus are primarily responsible for the day-to-day man-
            agement of the Cadence Funds. Mr. Breed is a Managing Director,
            the Chief Executive Officer, and a founding partner of Cadence,
            and has 25 years' investment management experience. He has been
            the driving force in developing the firm's growth-oriented stock
            screening and selection process and has been with Cadence or its
            predecessor since its inception. Mr. Breed graduated from the Uni-
            versity of Massachusetts and received his MBA from the Wharton
            School of Business. He is a Chartered Financial Analyst. Mr.
            Bannick is a Managing Director and Executive Vice President of Ca-
            dence and has 13 years' investment management experience. He pre-
            viously served as Executive Vice President of George D. Bjurman &
            Associates and as Supervising Portfolio Manager of Trinity Invest-
            ment Management Corporation. Mr. Bannick joined the predecessor of
            Cadence in 1992. He graduated from the University of Massachusetts
            and received his MBA from Boston University. Mr. Bannick is
            a Chartered Financial Analyst. Ms. Burdon is a Managing Director
            and Portfolio Manager of Cadence and has 10 years' investment man-
            agement experience. She previously served as a Vice President and
            Portfolio Manager of The Boston Company. Ms. Burdon joined the
            predecessor of Cadence in 1993. She graduated from Stanford Uni-
            versity and received a Master of Science degree from Northeastern
            University. Ms. Burdon is a Chartered Financial Analyst and Certi-
            fied Public Accountant. Mr. McManus is Director of Fund Management
            of Cadence and has 21 years' investment management experience. He
            previously served as a Vice President of Bank of Boston. Mr. Mc-
            Manus joined Cadence in 1994. He graduated from the University of
            Massachusetts, and he is certified as a Financial Planner.
 
            NFJ manages the Equity Income and Value Funds. NFJ is an invest-
            ment management firm organized as a general partnership. NFJ has
            two partners: PIMCO Advisors as the supervisory partner, and NFJ
            Management Inc. as the managing partner. NFJ Investment Group,
            Inc., the predecessor investment adviser to NFJ, commenced opera-
            tions in 1989. Accounts managed by NFJ had combined assets as of
            September 30, 1998 of approximately $2.2 billion. NFJ's address is
            2121 San Jacinto, Suite 1840, Dallas, Texas 75201. NFJ is regis-
            tered as an investment adviser with the Securities and Exchange
            Commission.
               Chris Najork and Benjamin Fischer are responsible for the day-
            to-day management of the Equity Income Fund. Mr. Najork is a Man-
            aging Director and a founding partner of NFJ and has 30 years' ex-
            perience encompassing equity research and portfolio management. He
            received his bachelor's degree and MBA from Southern Methodist
            University, and he is a Chartered Financial Analyst. Mr. Fischer
            is a Managing Director and a founding partner of NFJ and has 32
            years' experience encompassing equity research and portfolio man-
            agement. He received his bachelor's degree and JD from Oklahoma
            University and his MBA from New York University Graduate School of
            Business. He is a Chartered Financial Analyst. Messrs. Najork and
            Fischer and Paul A. Magnuson are primarily responsible for the
            day-to-day management of the Value Fund. Mr. Magnuson, a research
            analyst at NFJ, has 13 years' experience in equity research and
            portfolio management. He received his bachelor's degree in Finance
            from the University of Nebraska-Lincoln.
 
            COLUMBUS CIRCLE manages the Renaissance and Innovation Funds (the
            "Columbus Circle Funds"). Columbus Circle is an investment manage-
            ment firm organized as a general partnership. Columbus Circle has
            two partners: PIMCO Advisors as the supervisory partner, and Co-
            lumbus Circle Investors Management Inc. as the managing partner.
            Columbus Circle Investors Division of Thomson Advisory Group L.P.
            ("TAG"), the predecessor investment adviser to Columbus Circle,
            commenced operations in 1975. Accounts managed by Columbus Circle
            had combined assets as of September 30, 1998 of approximately $7.8
            billion. Columbus Circle's address is Metro Center, One Station
            Place, 8th Floor, Stamford, Connecticut 06902. Columbus Circle is
            registered as an investment adviser with the Securities and Ex-
            change Commission.
               At the center of Columbus Circle's equity investment strategy
            is its theory of Positive Momentum & Positive Surprise. This the-
            ory asserts that a good company doing better than generally ex-
            pected will experience a rise in its stock price, and conversely,
            a company falling short of expectations will experience a drop in
            its stock price. Based on this theory, Columbus Circle attempts to
            manage the Columbus Circle Funds with a view to investing in grow-
            ing companies that are surprising the market with business results
            that are better than anticipated.
 

                                               November 1, 1998 Prospectus  29
<PAGE>
 
               Investment decisions made by Columbus Circle are generally made
            by one or more committees, although the following individuals have
            primary responsibility for the noted Columbus Circle Funds. Clif-
            ford G. Fox is primarily responsible for the day-to-day management
            of the Renaissance Fund. Mr. Fox, a Managing Director of Columbus
            Circle, has 17 years of investment management experience. He re-
            ceived his bachelor's degree from the University of Pennsylvania
            and his MBA from New York University, and he is a Chartered Finan-
            cial Analyst. Anthony Rizza and Dennis P. McKechnie are primarily
            responsible for the day-to-day management of the Innovation Fund.
            Mr. Rizza, a Managing Director of Columbus Circle, has 12 years of
            investment management experience. He received his bachelor's de-
            gree from the University of Connecticut, and he is a Chartered Fi-
            nancial Analyst. Mr. McKechnie, a research analyst at Columbus
            Circle, has 7 years of investment management experience. He re-
            ceived his bachelor's degree from Purdue University and his MBA
            from Columbia University.
 
            PARAMETRIC manages the Tax-Efficient Equity Fund. Parametric is an
            investment management firm organized as a general partnership.
            Parametric has two partners: PIMCO Advisors as the supervisory
            partner, and Parametric Management Inc. as the managing partner.
            Parametric Portfolio Associates, Inc., the predecessor investment
            adviser to Parametric, commenced operations in 1987. Accounts
            managed by Parametric had combined assets as of September 30, 1998
            of approximately $2.8 billion. Parametric's address is 7310
            Columbia Center, 701 Fifth Avenue, Seattle, Washington 98104-7090.
            Parametric is registered as an investment adviser with the
            Securities and Exchange Commission and as a commodity trading
            adviser with the CFTC.
               David Stein, Tom Seto and Cliff Quisenberry are primarily re-
            sponsible for the day-to-day management of the Tax-Efficient Eq-
            uity Fund. Mr. Stein is a Managing Director of Parametric and has
            been associated with Parametric since June 1996. He also directs
            research and product development for Parametric. Mr. Stein gradu-
            ated with bachelor's and master's degrees in Applied Mathematics
            from the University of Witwatersrand, South Africa, and received a
            Ph.D. in Applied Mathematics from Harvard University. Prior to
            joining Parametric, Mr. Stein served as the Director of Investment
            Research at GTE Investment Management, Director of Active Equity
            Strategies at the Vanguard Group, and Director of Quantitative
            Portfolio Management and Research at IBM. Mr. Seto is a Vice Pres-
            ident of Parametric and has 7 years of experience in managing
            structured equity portfolios. Prior to joining Parametric, he
            served as the Head of U.S. Equity Index Investments at Barclays
            Global Investors. Mr. Seto graduated from the University of Wash-
            ington with a bachelor's degree in Electrical Engineering, and
            from the University of Chicago with an MBA in Finance. Mr.
            Quisenberry is a Vice President of Parametric and has been with
            Parametric since 1994. He previously served as a Vice President
            and Portfolio Manager at Cutler & Co., and as a Security Analyst
            and Portfolio Manager at Fred Alger Management. Mr. Quisenberry
            graduated from Yale University with a bachelor's degree in Econom-
            ics. He is a Chartered Financial Analyst.
 
            Registration as an investment adviser with the Securities and Ex-
            change Commission does not involve supervision by the Securities
            and Exchange Commission over investment advice, and registration
            with the CFTC as a commodity trading adviser does not involve su-
            pervision by the CFTC over commodities trading. The portfolio man-
            agement agreements are not exclusive, and Columbus Circle, Ca-
            dence, NFJ and Parametric may provide, and currently are provid-
            ing, investment management services to other clients, including
            other investment companies.
 
FUND
ADMINISTRATOR
            PIMCO Advisors also serves as administrator (the "Administrator")
            for the Funds' Class D shares pursuant to an administration agree-
            ment with the Trust. The Administrator provides or procures admin-
            istrative services for Class D shareholders of the Funds, which
            include clerical help and accounting, bookkeeping, internal audit
            services and certain other services required by the Funds, and
            preparation of reports to the Funds' shareholders and regulatory
            filings. The Administrator has retained Pacific Investment Manage-
            ment Company, its affiliate, to provide such services as sub-ad-
            ministrator. The Administrator and/or the sub-administrator may
            also retain other affiliates to provide certain of these services.
            In addition, the Administrator, at its own expense, arranges for
            the provision of legal, audit, custody, transfer agency (including
            sub-transfer agency and other administrative services) and other
            services necessary for the
 

30  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            ordinary operation of the Funds, and is responsible for the costs
            of registration of the Trust's shares and the printing of prospec-
            tuses and shareholder reports for current shareholders.
               PIMCO Advisors or an affiliate may pay financial service firms
            a portion of the Class D administration fees in return for the
            firms' services (normally not to exceed an annual rate of .35% of
            a Fund's average daily net assets attributable to Class D shares
            purchased through such firms). The Funds' administration agreement
            includes a plan for Class D shares that has been adopted in con-
            formity with the requirements set forth in Rule 12b-1 under the
            1940 Act. The plan provides that up to .25% per annum of the Class
            D administrative fees paid under the administration agreement may
            represent reimbursement for expenses in respect of activities that
            may be deemed to be primarily intended to result in the sale of
            Class D shares. The principal types of activities for which such
            payments may be made are services in connection with the distribu-
            tion of Class D shares and/or the provision of shareholder servic-
            es.
               The Funds (and not the Administrator) are responsible for the
            following expenses: (i) salaries and other compensation of any of
            the Trust's executive officers and employees who are not officers,
            directors, stockholders, or employees of PIMCO Advisors, Pacific
            Investment Management Company, or their subsidiaries or affili-
            ates; (ii) taxes and governmental fees; (iii) brokerage fees and
            commissions and other portfolio transaction expenses; (iv) the
            costs of borrowing money, including interest expenses; (v) fees
            and expenses of the Trustees who are not "interested persons" of
            the Adviser, any Portfolio Manager, or the Trust, and any counsel
            retained exclusively for their benefit; (vi) extraordinary ex-
            penses, including costs of litigation and indemnification ex-
            penses; (vii) expenses which are capitalized in accordance with
            generally accepted accounting principles; and (viii) any expenses
            allocated or allocable to a specific class of shares, and may in-
            clude certain other expenses as permitted by the Trust's Multiple
            Class Plan adopted pursuant to Rule 18f-3 under the 1940 Act, sub-
            ject to review and approval by the Trustees.
 
ADVISORY    The Funds feature fixed advisory and administrative fees. For pro-
AND         viding or arranging for the provision of investment advisory serv-
ADMINI-     ices to the Funds as described above, PIMCO Advisors receives
STRATIVE    monthly fees from each Fund at an annual rate based on the average
FEES        daily net assets of the Fund as follows:





<TABLE>
<CAPTION>
                                   ADVISORY
           FUND                    FEE RATE
           ---------------------------------
           <S>                     <C>
           Equity Income, Value,
            Tax-Efficient Equity,
            Capital Appreciation
            and Mid-Cap Growth
            Funds                  .45%
           ---------------------------------
           Renaissance Fund        .60%
           ---------------------------------
           Innovation Fund         .65%
</TABLE>
 
 
               For providing or procuring administrative services to the Funds
            as described above, the Administrator receives monthly fees from
            each Fund at an annual rate based on the average daily net assets
            attributable to the Fund's Class D shares as follows:
 
 
<TABLE>
<CAPTION>
                           ADMINISTRATIVE
                           FEE RATE*
           -------------------------------
           <S>                  <C>
           All Funds             .65%
</TABLE>
 
            * As described under "Fund Administrator," the administration
            agreement includes a plan adopted in conformity with Rule 12b-1
            which provides for the payment of up to .25% of the .65% Adminis-
            trative Fee Rate as reimbursement for expenses in respect of ac-
            tivities that may be deemed to be primarily intended to result in
            the sale of Class D shares. The "Annual Fund Operating Expenses"
            table on page 4 of this Prospectus shows the .65% Administrative
            Fee Rate under two separate columns entitled "Administrative Fees"
            (.40%) and "12b-1 (Service) Fees" (.25%).
 
               The investment advisory, administration and sub-administration
            agreements for the Funds may be terminated by the Trustees, or by
            PIMCO Advisors or Pacific Investment Management Company (as the
            case may be) on 60 days' written notice. In addition, the invest-
            ment advisory agreement may be terminated with regard to the Re-
            naissance and Innovation Funds by a majority of the Trustees that
            are not interested persons of the Trust, PIMCO Advisors or Pacific
 

                                                 November 1, 1998 Prospectus  31
<PAGE>
 
            Investment Management Company (as the case may be) on 60 days'
            written notice. Following their initial terms, the agreements will
            continue from year-to-year if approved by the Trustees.
               Pursuant to the portfolio management agreements between the Ad-
            viser and each of the Portfolio Managers, PIMCO Advisors (and not
            the Funds or the Trust) pays each Portfolio Manager a fee based on
            a percentage of the average daily net assets of a Fund as follows:
            Columbus Circle--.38% for the Renaissance Fund and .38% for the
            Innovation Fund; Cadence--.35% for the Capital Appreciation Fund
            and .35% for the Mid-Cap Growth Fund; NFJ--.35% for the Equity In-
            come Fund and .35% for the Value Fund; and Parametric--.35% for
            the Tax-Efficient Equity Fund.
 
PORTFOLIO   Pursuant to the portfolio management agreements, a Portfolio Man-
TRANSACTIONSager places orders for the purchase and sale of portfolio invest-
            ments for a Fund's accounts with brokers or dealers selected by it
            in its discretion. In effecting purchases and sales of portfolio
            securities for the accounts of the Funds, the Portfolio Managers
            will seek the best price and execution of the Fund's orders. In
            doing so, a Fund may pay higher commission rates than the lowest
            available when the Portfolio Manager believes it is reasonable to
            do so in light of the value of the brokerage and research services
            provided by the broker effecting the transaction. The Portfolio
            Managers also may consider sales of shares of the Trust as a fac-
            tor in the selection of broker-dealers to execute portfolio trans-
            actions for the Trust.
               Some securities considered for investment by the Funds may also
            be appropriate for other clients served by the Portfolio Managers.
            If a purchase or sale of securities consistent with the investment
            policies of a Fund and one or more of these clients served by a
            Portfolio Manager is considered at or about the same time, trans-
            actions in such securities will be allocated among the Fund and
            clients in a manner deemed fair and reasonable by the Portfolio
            Manager. Particularly when investing in less liquid or illiquid
            securities of smaller capitalization companies, such allocation
            may take into account the asset size of a Fund in determining
            whether the allocation of an investment is suitable. As a result,
            larger Funds may become more concentrated in more liquid securi-
            ties than smaller Funds or private accounts of a Portfolio Manager
            pursuing a small capitalization investment strategy, which could
            adversely affect performance. A Portfolio Manager may aggregate
            orders for the Funds with simultaneous transactions entered into
            on behalf of its other clients so long as price and transaction
            expense are averaged either for the particular transaction or for
            that day.
 
            Description of the Trust
 
CAPITALIZATION
            The Trust was organized as a Massachusetts business trust on Au-
            gust 24, 1990, and currently consists of twenty-eight portfolios
            that are operational, seven of which are described in this Pro-
            spectus. Other portfolios may be offered by means of a separate
            prospectus. The Board of Trustees may establish additional portfo-
            lios in the future. The capitalization of the Trust consists of an
            unlimited number of shares of beneficial interest. When issued,
            shares of the Trust are fully paid, non-assessable and freely
            transferable.
               Under Massachusetts law, shareholders could, under certain cir-
            cumstances, be held liable for the obligations of the Trust. How-
            ever, the Second Amended and Restated Agreement and Declaration of
            Trust (the "Declaration of Trust") of the Trust disclaims share-
            holder liability for acts or obligations of the Trust and requires
            that notice of such disclaimer be given in each agreement, obliga-
            tion or instrument entered into or executed by the Trust or the
            Trustees. The Declaration of Trust also provides for indemnifica-
            tion out of a Fund's property for all loss and expense of any
            shareholder of that Fund held liable on account of being or having
            been a shareholder. Thus, the risk of a shareholder incurring fi-
            nancial loss on account of shareholder liability is limited to
            circumstances in which such disclaimer is inoperative or the Fund
            of which he or she is or was a shareholder is unable to meet its
            obligations, and thus should be considered remote.
 

32  PIMCO Funds: Multi-Manager Series

<PAGE>
 
 
MULTIPLE    In addition to Class D shares, certain Funds also offer up to five
CLASSES OF  additional classes of shares, Class A, Class B, Class C, Institu-
SHARES      tional Class and Administrative Class shares, through separate
            prospectuses. This Prospectus relates only to Class D shares of
            the Funds. Unlike Class D shares, which may be purchased only
            through financial service firms, the other classes may be pur-
            chased directly from the Trust and/or the Distributor. The other
            classes may be subject to sales charges and different levels of
            operating expenses than Class D shares. As a result of different
            charges and expense levels, the other five classes are expected to
            achieve different investment returns than Class D shares. Share-
            holders of a particular class may also receive additional services
            or services different from those received by the other classes. To
            obtain more information about Class A, Class B and Class C shares,
            please call the Distributor at 1-800-426-0107. To obtain more in-
            formation about Institutional Class and Administrative Class
            shares, please call 1-800-927-4648.
               Each class of shares of each Fund represents interests in the
            assets of that Fund, and each class has identical dividend, liqui-
            dation and other rights and the same terms and conditions, except
            that expenses related to the distribution and shareholder servic-
            ing of a particular class of shares are borne solely by such class
            and each class may, at the Trustees' discretion, also pay a dif-
            ferent share of other expenses, not including advisory or custo-
            dial fees or other expenses related to the management of the
            Trust's assets, if these expenses are actually incurred in a dif-
            ferent amount by that class, or if the class receives services of
            a different kind or to a different degree than the other classes.
            All other expenses are allocated to each class on the basis of the
            net asset value of that class in relation to the net asset value
            of the particular Fund.
 
VOTING      Each class of shares of each Fund has identical voting rights, ex-
            cept that each class of shares has exclusive voting rights on any
            matter submitted to shareholders that relates solely to that
            class, and has separate voting rights on any matter submitted to
            shareholders in which the interests of one class differ from the
            interests of any other class. Each class of shares has exclusive
            voting rights with respect to matters pertaining to any distribu-
            tion and servicing plan or agreement applicable only to that
            class. These shares are entitled to vote at meetings of sharehold-
            ers. Matters submitted to shareholder vote must be approved by
            each Fund separately except (i) when required by the 1940 Act
            shares shall be voted together and (ii) when the Trustees have de-
            termined that the matter does not affect all Funds, then only
            shareholders of the Fund or Funds affected shall be entitled to
            vote on the matter. All classes of shares of a Fund will vote to-
            gether, except with respect to a distribution and servicing plan
            or agreement applicable to a class of shares or when a class vote
            is required as specified above or otherwise by the 1940 Act.
            Shares are freely transferable, are entitled to dividends as de-
            clared by the Trustees and, in liquidation of the Trust, are enti-
            tled to receive the net assets of their Fund, but not of the other
            Funds. The Trust does not generally hold annual meetings of share-
            holders and will do so only when required by law. Shareholders may
            remove Trustees from office by votes cast in person or by proxy at
            a meeting of shareholders or by written consent. Such a meeting
            will be called at the written request of the holders of 10% of the
            Trust's outstanding shares.
               Shares entitle their holders to one vote per share (with
            proportionate voting for fractional shares). As of October 13,
            1998, the following was a shareholder of record of at least 25% of
            the outstanding voting securities of the indicated Fund: PIMCO
            Advisors L.P. (Newport Beach, California), the Trust's investment
            adviser and administrator, with respect to the Tax-Efficient
            Equity Fund. As used in this Prospectus, the phrase "vote of a
            majority of the outstanding shares" of a Fund (or the Trust) means
            the vote of the lesser of: (1) 67% of the shares of the Fund (or
            the Trust) present at a meeting, if the holders of more than 50%
            of the outstanding shares are present in person or by proxy; or
            (2) more than 50% of the outstanding shares of the Fund (or the
            Trust).
 
                                                 November 1, 1998 Prospectus  33
<PAGE>
 
            --------------------------------------------------------------------
PIMCO       INVESTMENT ADVISER AND ADMINISTRATOR
FUNDS:      
MULTI-      PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA 
MANAGER     92660
SERIES      --------------------------------------------------------------------
            PORTFOLIO MANAGERS
 
            Cadence Capital Management, NFJ Investment Group, Columbus Circle
            Investors, Parametric Portfolio Associates
            --------------------------------------------------------------------
            DISTRIBUTOR
 
            PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT
            06902
            --------------------------------------------------------------------
            CUSTODIAN
 
            Investors Fiduciary Trust Company, 801 Pennsylvania, Kansas City,
            MO 64105
            --------------------------------------------------------------------
            SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT
 
            Shareholder Services, Inc. P.O. Box 5866, Denver, CO 80217
            --------------------------------------------------------------------
            INDEPENDENT ACCOUNTANTS
 
            PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO 64105
            --------------------------------------------------------------------
            LEGAL COUNSEL
 
            Ropes & Gray, One International Place, Boston, MA 02110
            --------------------------------------------------------------------
            For further information about the PIMCO Funds, call 1-888-87-PIMCO
            or visit our Web site at www.pimcofunds.com.
<PAGE>
 
                           PIMCO FUNDS IS ON THE WEB

                              www.pimcofunds.com


A PARTIAL LIST OF WHAT'S AVAILABLE:

DAILY MANAGER COMMENTARY

FUND MANAGER BIOS

CURRENT AND HISTORICAL FUND PERFORMANCE

LIPPER RANKINGS

MORNINGSTAR RATINGS

LISTING OF FUND PORTFOLIO HOLDINGS

RISK ANALYSIS

DAILY SHARE PRICES

RESOURCES FOR INVESTMENT PROFESSIONALS

(GRAPHIC APPEARS HERE)

PIMCO Funds Distributors LLC is pleased to announce the launch of its Web site.
We can be found on the Worldwide Web at www.pincofunds.com.

You now have around-the-clock access to the most timely and comprehensive 
information available on all of the PIMCO Funds. In addition, the site includes 
daily commentary from our fund managers, with insights on the economy and other 
factors affecting the stockand bond markets.

(GRAPHIC APPEARS HERE)

You'll find the site to be informative and easy-to-use. There are several 
functions that can help you navigate your way around the site. Among the major 
sections are Investment Insight and Fund Information.

(GRAPHIC APPEARS HERE)

INVESTMENT INSIGHT

The Investment Insight section provides an overview of six of the investment 
management firms which are part of PIMCO Advisors L.P. You'll find an 
explanation of each firm's investment process, biographies of the investment 
team, manager updates and more.

(GRAPHIC APPEARS HERE)

FUND INFORMATION

In the Fund Information section you'll access profiles of all the PIMCO Funds. 
Some include a summary of each fund's portfolio, risk analysis data, Lipper 
rankings and Morningstar ratings. You an also obtain daily fund share prices. 
And now we provide current and historical performance for Class D shares.

QUESTIONS?

We're sure you will find the PIMCO Funds Web site to be an invaluable tool. If 
you have any comments or questions about the site, please call us today at 
1-888-87-PIMCO. Or, use the e-mail feature of the site to contact us.

Please read the relevant prospectus carefully before you invest in any PIMCO 
Fund.

<PAGE>
 
                            PIMCO Funds Prospectus








Multi Manager
Series               STOCK AND BOND FUNDS           AGGRESSIVE STOCK FUNDS
                     Balanced Fund                  Small-Cap Value Fund
November 1, 1998
                                                    Opportunity Fund

Share Classes
 A   B   C           STOCK FUNDS
                     Equity Income Fund
                                                    SPECIALIZED STOCK FUNDS

                     Value Fund                     International Fund

                     Renaissance Fund               Innovation Fund

                     Tax-Efficient Equity Fund      Precious Metals Fund

                     Capital Appreciation Fund      

                     Growth Fund

                     Value 25 Fund

                     Mid-Cap Growth Fund

                     Target Fund







                                                                           PIMCO

                                                                           FUNDS

<PAGE>
 
            PIMCO Funds: Multi-Manager Series
            Prospectus
            November 1, 1998
 
            PIMCO Funds: Multi-Manager Series (the "Trust") is an open-end se-
            ries management investment company offering fifteen separate di-
            versified investment portfolios (each a "Fund") in this Prospec-
            tus, each with different investment objectives and strategies. The
            address of PIMCO Funds: Multi-Manager Series is 840 Newport Center
            Drive, Suite 300, Newport Beach, CA 92660.
 
            Each Fund (except the Opportunity Fund) offers three classes of
            shares in this Prospectus: Class A shares (generally sold subject
            to an initial sales charge), Class B shares (sold subject to a
            contingent deferred sales charge) and Class C shares (sold subject
            to an asset based sales charge). The Opportunity Fund does not of-
            fer Class B shares. Through separate prospectuses, certain Funds
            may offer up to three additional classes of shares, Class D, In-
            stitutional Class and Administrative Class shares. See "Alterna-
            tive Purchase Arrangements."
 
            This Prospectus concisely describes the information investors
            should know before investing in Class A, Class B and Class C
            shares of the Funds. Please read this Prospectus carefully and
            keep it for further reference.
 
            Information about the investment objective of each Fund, along
            with a detailed description of the types of securities in which
            each Fund may invest, and of investment policies and restrictions
            applicable to each Fund, are set forth in this Prospectus. There
            can be no assurance that the investment objective of any Fund will
            be achieved. Because the market value of each Fund's investments
            will change, the investment returns and net asset value per share
            of each Fund will vary.
 
            A Statement of Additional Information, dated November 1, 1998, as
            amended or supplemented from time to time, is available free of
            charge by writing to PIMCO Funds Distributors LLC (the "Distribu-
            tor"), 2187 Atlantic Street, Stamford, Connecticut 06902, or by
            telephoning 1-800-426-0107. The Statement of Additional Informa-
            tion, which contains more detailed information about the Trust,
            has been filed with the Securities and Exchange Commission and is
            incorporated by reference in this Prospectus. The Securities and
            Exchange Commission maintains an Internet World Wide Web site (at
            www.sec.gov) which contains the Statement of Additional Informa-
            tion, materials that are incorporated by reference into this Pro-
            spectus and the Statement of Additional Information, and other in-
            formation about the Funds.
 
            THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SE-
            CURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMIS-
            SION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
            SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
            PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OF-
            FENSE.
 
            SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARAN-
            TEED OR ENDORSED BY, ANY FINANCIAL INSTITUTION, AND THE SHARES ARE
            NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORA-
            TION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND INVOLVE
            RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
 
 
TABLE OF CONTENTS
<TABLE>
<S>                                     <C>
PIMCO Funds Overview..................   3
Schedule of Fees......................   4
Financial Highlights..................   8
Investment Objectives and Policies...   18
Characteristics and Risks of Securities
 and Investment Techniques...........   26
Performance Information..............   38
How to Buy Shares....................   39
Alternative Purchase Arrangements ...   44
Exchange Privilege...................   52
How to Redeem........................   53
Distributor and Distribution and
Servicing Plans......................   57
How Net Asset Value Is Determined....   60
Distributions........................   60
Taxes................................   61
Management of the Trust..............   62
Description of the Trust.............   68
Mailings to Shareholders.............   69
</TABLE>
 
2  PIMCO Funds: Multi-Manager Series

<PAGE>
 
            PIMCO Funds Overview
 
            PIMCO Advisors L.P. ("PIMCO Advisors" or the "Adviser") is the in-
            vestment adviser of all the Funds. PIMCO Advisors is one of the
            largest investment management firms in the U.S. As of September
            30, 1998, PIMCO Advisors and its subsidiary partnerships had ap-
            proximately $225.9 billion in assets under management. Each of the
            Funds also has a sub-adviser (each a "Portfolio Manager") respon-
            sible for portfolio investment decisions. All of the Funds' Port-
            folio Managers are affiliates of PIMCO Advisors except for Van Eck
            Associates Corporation ("Van Eck"), an independent Portfolio Man-
            ager that advises the Precious Metals Fund. The affiliated Portfo-
            lio Managers are listed below.
 
<TABLE>
<CAPTION>
                                                              INVESTMENT SPECIALTY
           ---------------------------------------------------------------------------------------------------------
           <C>                                                <S>
           COLUMBUS CIRCLE INVESTORS ("Columbus Circle")      Stocks, using its "Positive Momentum & Positive
                                                              Surprise" discipline
                                                              ------------------------------------------------------
           CADENCE CAPITAL MANAGEMENT ("Cadence")             Stocks of growth companies that the Portfolio Manager
                                                              believes are trading at a reasonable price
                                                              ------------------------------------------------------
           NFJ INVESTMENT GROUP ("NFJ")                       Value stocks that the Portfolio Manager believes are
                                                              undervalued and/or offer above-average dividend yields
                                                              ------------------------------------------------------
           BLAIRLOGIE CAPITAL MANAGEMENT ("Blairlogie") (/1/) International stocks using Scottish standards of
                                                              prudent investment management with modern quantitative
                                                              analytical tools
                                                              ------------------------------------------------------
           PACIFIC INVESTMENT MANAGEMENT COMPANY              All sectors of the bond market using its total return
           ("Pacific Investment Management")                  philosophy--seeking both yield and capital
                                                              appreciation
                                                              ------------------------------------------------------
           PARAMETRIC PORTFOLIO ASSOCIATES ("Parametric")     Stocks, using quantitatively-driven fundamental
                                                              analysis and economic methods, with a specialty in
                                                              tax-efficient products
</TABLE>
 
<TABLE>
<CAPTION>
FUND
PROFILES
                        FUND NAME         INVESTMENT OBJECTIVE     PRIMARY INVESTMENTS (/2/)  PORTFOLIO MANAGER
           -----------------------------------------------------------------------------------------------------------
           <S>          <C>               <C>                      <C>                        <C>
           STOCK &      Balanced          Total return consistent  Common stocks, fixed       Cadence, NFJ and Pacific
           BOND FUNDS                     with prudent investment  income securities and      Investment Management
                                          management               money market instruments
           -----------------------------------------------------------------------------------------------------------
           STOCK FUNDS  Equity            Current income as a      Common stocks with below-  NFJ
                        Income            primary objective; long- average price to earnings
                                          term growth of capital   ratios and higher dividend
                                          as a secondary objective yields relative to their
                                                                   industry groups
                        ----------------------------------------------------------------------------------------------
                        Value             Long-term growth of      Common stocks with below-  NFJ
                                          capital and income       average price to earnings
                                                                   ratios relative to their
                                                                   industry groups
                        ----------------------------------------------------------------------------------------------
                        Renaissance       Long-term growth of      Common stocks with below-  Columbus Circle
                                          capital and income       average valuations that
                                                                   have improving business
                                                                   fundamentals
                        ----------------------------------------------------------------------------------------------
                        Tax-Efficient     Maximum after-tax growth A broadly diversified      Parametric
                        Equity            of capital               portfolio of at least 200
                                                                   common stocks of companies
                                                                   with larger
                                                                   market capitalizations
                        ----------------------------------------------------------------------------------------------
                        Capital           Growth of capital        Common stocks of companies Cadence
                        Appreciation                               with market
                                                                   capitalizations of at
                                                                   least $1 billion that have
                                                                   improving fundamentals and
                                                                   whose stock is reasonably
                                                                   valued by the market
                        ----------------------------------------------------------------------------------------------
                        Growth            Long-term growth of      Common stocks of companies Columbus Circle
                                          capital; income is       with medium to large
                                          incidental               market capitalizations
                        ----------------------------------------------------------------------------------------------
                        Value 25          Long-term growth of      Approximately 25 common    NFJ
                                          capital and income       stocks of companies with
                                                                   medium market
                                                                   capitalizations that have
                                                                   below-average price to
                                                                   earnings ratios relative
                                                                   to their industry groups
                        ----------------------------------------------------------------------------------------------
                        Mid-Cap           Growth of capital        Common stocks of companies Cadence
                        Growth                                     with market
                                                                   capitalizations in excess
                                                                   of $500 million that have
                                                                   improving fundamentals and
                                                                   whose stock is reasonably
                                                                   valued by the market
                        ----------------------------------------------------------------------------------------------
                        Target            Capital appreciation; no Common stocks of companies Columbus Circle
                                          consideration given to   with medium market
                                          income                   capitalizations
           -----------------------------------------------------------------------------------------------------------
           AGGRESSIVE   Small-Cap         Long-term growth of      Common stocks of companies NFJ
           STOCK FUNDS  Value             capital and income       with market
                                                                   capitalizations between
                                                                   $50 million and $1 billion
                                                                   and below-average price to
                                                                   earnings ratios relative
                                                                   to their industry groups
                        ----------------------------------------------------------------------------------------------
                        Opportunity (/3/) Capital appreciation; no Common stocks of companies Columbus Circle
                                          consideration given to   with market
                                          income                   capitalizations of less
                                                                   than $2 billion
           -----------------------------------------------------------------------------------------------------------
           SPECIALIZED  International     Capital appreciation;    Non-U.S. stocks of         Blairlogie (/1/)
           STOCK FUNDS                    income is                companies with small,
                                          incidental               medium and large market
                                                                   capitalizations (developed
                                                                   and emerging markets)
                        ----------------------------------------------------------------------------------------------
                        Innovation        Capital appreciation; no Common stocks of companies Columbus Circle
                                          consideration given to   with small, medium and
                                          income                   large market
                                                                   capitalizations
                                                                   (technology-related
                                                                   stocks)
                        ----------------------------------------------------------------------------------------------
                        Precious          Capital appreciation; no U.S. and non-U.S. stocks   Van Eck
                        Metals            consideration given to   of companies with medium
                                          income                   and large market
                                                                   capitalizations (precious
                                                                   metals-related stocks)
</TABLE>
            1. On or before March 31, 1999, it is anticipated that PIMCO Advi-
            sors will sell substantially all of its ownership interest in
            Blairlogie and assume full portfolio management responsibility for
            the International Fund. See "Management of the Trust--Portfolio
            Managers--Blairlogie."
            2. For specific information concerning the market capitalizations
            of companies in which each Fund may invest and each Fund's invest-
            ment style, see "Investment Objectives and Policies" in this Pro-
            spectus.
            3. Except to the extent described under "How to Buy Shares--Re-
            strictions on Sales of and Exchanges for Shares of the Opportunity
            Fund," the Opportunity Fund is closed to new investors.


                                                 November 1, 1998 Prospectus  3
<PAGE>
 
            Schedule of Fees
 
 
 
 
<TABLE>
<CAPTION>
                                         CLASS A     CLASS B       CLASS C
                                         SHARES      SHARES(/1/)   SHARES
SHAREHOLDER ------------------------------------------------------------------
TRANSACTION <S>                           <C>         <C>           <C>
EXPENSES    MAXIMUM INITIAL SALES CHARGE
            IMPOSED ON PURCHASES
            (as a percentage of offering
            price at time of purchase)    5.50%         None        None
           ------------------------------------------------------------------
           MAXIMUM SALES CHARGE IMPOSED
            ON REINVESTED DIVIDENDS
            (as a percentage of net as-
            set value at time of pur-
            chase)                         None         None        None
           ------------------------------------------------------------------
           MAXIMUM CONTINGENT DEFERRED
            SALES CHARGE ("CDSC")
            (as a percentage of original
            purchase price)                  1%(/2/)      5%(/3/)     1%(/4/)
           ------------------------------------------------------------------
           EXCHANGE FEE                    None         None        None
</TABLE>
 



 
            1. The Opportunity Fund does not offer Class B shares.
            2. Imposed only in certain circumstances where Class A shares are
            purchased without a front-end sales charge at the time of pur-
            chase. See "Alternative Purchase Arrangements" in this Prospectus.
            3. The maximum CDSC is imposed on shares redeemed in the first
            year. For shares held longer than one year, the CDSC declines ac-
            cording to the schedule set forth under "Alternative Purchase Ar-
            rangements -- Deferred Sales Charge Alternative -- Class B Shares"
            in this Prospectus.
            4. The CDSC on Class C shares is imposed only on shares redeemed
            in the first year.
 
 
 
 
<TABLE>
<CAPTION>
                                                                 EXAMPLE: You would pay the        EXAMPLE: You would pay the
                                                                 following expenses on a $1,000    following expenses on a $1,000
                                                                 investment assuming (1) 5%        investment assuming (1) 5%
                                                                 annual return and (2)             annual return and (2) no
                    ANNUAL FUND OPERATING EXPENSES               redemption at the end             redemption:
                    (As a percentage of average net assets):     of each time period:
                                                     TOTAL
                               ADMINI-               FUND
                    ADVISORY   STRATIVE   12B-1      OPERATING   YEAR                              YEAR
   FUND             FEES       FEES(/1/)  FEES(/2/)  EXPENSES    1       3       5        10       1       3       5        10
   --------------------------------------------------------------------------------------------------------------------------------
   <S>              <C>        <C>        <C>        <C>         <C>     <C>     <C>      <C>      <C>     <C>     <C>      <C>
   BALANCED               .45%       .40%       .25%       1.10%     $66     $88     $112     $182     $66     $88     $112     $182
   --------------------------------------------------------------------------------------------------------------------------------
   EQUITY INCOME          .45        .40        .25        1.10       66      88      112      182      66      88      112      182
   --------------------------------------------------------------------------------------------------------------------------------
   VALUE                  .45        .40        .25        1.10       66      88      112      182      66      88      112      182
   --------------------------------------------------------------------------------------------------------------------------------
   RENAISSANCE            .60        .40        .25        1.25       67      92      120      198      67      92      120      198
   --------------------------------------------------------------------------------------------------------------------------------
   TAX-EFFICIENT
    EQUITY                .45        .40        .25        1.10       66      88       --       --      66      88       --       --
   --------------------------------------------------------------------------------------------------------------------------------
   CAPITAL
    APPRECIATION          .45        .40        .25        1.10       66      88      112      182      66      88      112      182
   --------------------------------------------------------------------------------------------------------------------------------
   GROWTH                 .50        .40        .25        1.15       66      90      115      187      66      90      115      187
   --------------------------------------------------------------------------------------------------------------------------------
   VALUE 25               .50        .40        .25        1.15       66      90       --       --      66      90       --       --
   --------------------------------------------------------------------------------------------------------------------------------
   MID-CAP GROWTH         .45        .40        .25        1.10       66      88      112      182      66      88      112      182
   --------------------------------------------------------------------------------------------------------------------------------
   TARGET                 .55        .40        .25        1.20       67      91      117      192      67      91      117      192
   --------------------------------------------------------------------------------------------------------------------------------
   SMALL-CAP VALUE        .60        .40        .25        1.25       67      92      120      198      67      92      120      198
   --------------------------------------------------------------------------------------------------------------------------------
   OPPORTUNITY            .65        .40        .25        1.30       68      94      122      203      68      94      122      203
   --------------------------------------------------------------------------------------------------------------------------------
   INTERNATIONAL          .55        .65        .25        1.45       69      98      130      219      69      98      130      219
   --------------------------------------------------------------------------------------------------------------------------------
   INNOVATION             .65        .40        .25        1.30       68      94      122      203      68      94      122      203
   --------------------------------------------------------------------------------------------------------------------------------
   PRECIOUS METALS        .60        .45        .25        1.30       68      94      122      203      68      94      122      203
</TABLE>
 
CLASS A
SHARES
            1. The Administrative Fees for each Fund are subject to reduction
            to the extent that the average net assets attributable in the ag-
            gregate to the Fund's Class A, Class B and Class C shares exceed
            $2.5 billion. See "Management of the Trust -- Advisory and Admin-
            istrative Fees."
            2. 12b-1 fees represent servicing fees which are paid annually to
            the Distributor and repaid to participating brokers, certain banks
            and other financial intermediaries. See "Distributor and Distribu-
            tion and Servicing Plans."


4  PIMCO Funds: Multi-Manager Series

<PAGE>
 
 
 
 
<TABLE>
<CAPTION>
                                                                    EXAMPLE: You would pay the
                                                                    following expenses on a $1,000
                                                                    investment assuming (1) 5%
                      ANNUAL FUND OPERATING EXPENSES                annual return and (2) redemption
Class                 (As a percentage of average net assets):      at the end of each time period:
B
Shares                                                  TOTAL
                                 ADMINI-                FUND
                      ADVISORY   STRATIVE   12B-1       OPERATING   YEAR
FUND                  FEES       FEES(/1/)  FEES(/2/)   EXPENSES    1        3       5        10
- ------------------------------------------------------------------------------------------------------
<S>                   <C>        <C>        <C>         <C>         <C>      <C>     <C>      <C>
BALANCED                    .45%       .40%       1.00%       1.85%     $69      $88     $120     $188
- ------------------------------------------------------------------------------------------------------
EQUITY INCOME               .45        .40        1.00        1.85       69       88      120      188
- ------------------------------------------------------------------------------------------------------
VALUE                       .45        .40        1.00        1.85       69       88      120      188
- ------------------------------------------------------------------------------------------------------
RENAISSANCE                 .60        .40        1.00        2.00       70       93      128      204
- ------------------------------------------------------------------------------------------------------
TAX-EFFICIENT
 EQUITY                     .45        .40        1.00        1.85       69       88       --       --
- ------------------------------------------------------------------------------------------------------
CAPITAL APPRECIATION        .45        .40        1.00        1.85       69       88      120      188
- ------------------------------------------------------------------------------------------------------
GROWTH                      .50        .40        1.00        1.90       69       90      123      193
- ------------------------------------------------------------------------------------------------------
VALUE 25                    .50        .40        1.00        1.90       69       90       --       --
- ------------------------------------------------------------------------------------------------------
MID-CAP GROWTH              .45        .40        1.00        1.85       69       88      120      188
- ------------------------------------------------------------------------------------------------------
TARGET                      .55        .40        1.00        1.95       70       91      125      198
- ------------------------------------------------------------------------------------------------------
SMALL-CAP VALUE             .60        .40        1.00        2.00       70       93      128      204
- ------------------------------------------------------------------------------------------------------
INTERNATIONAL               .55        .65        1.00        2.20       72       99      138      225
- ------------------------------------------------------------------------------------------------------
INNOVATION                  .65        .40        1.00        2.05       71       94      130      209
PRECIOUS METALS             .60        .45        1.00        2.05       71       94      130      209
<CAPTION>
                      EXAMPLE: You would pay the
                      following expenses on a $1,000
                      investment assuming (1) 5%
                      annual return and (2) no
                      redemption:
                      YEAR
FUND                  1       3       5        10
- ---------------------------------------------------------
<S>                   <C>     <C>     <C>      <C>
BALANCED                  $19     $58     $100     $188
- ---------------------------------------------------------
EQUITY INCOME              19      58      100      188
- ---------------------------------------------------------
VALUE                      19      58      100      188
- ---------------------------------------------------------
RENAISSANCE                20      63      108      204
- ---------------------------------------------------------
TAX-EFFICIENT
 EQUITY                    19      58       --       --
- ---------------------------------------------------------
CAPITAL APPRECIATION       19      58      100      188
- ---------------------------------------------------------
GROWTH                     19      60      103      193
- ---------------------------------------------------------
VALUE 25                   19      60       --       --
- ---------------------------------------------------------
MID-CAP GROWTH             19      58      100      188
- ---------------------------------------------------------
TARGET                     20      61      105      198
- ---------------------------------------------------------
SMALL-CAP VALUE            20      63      108      204
- ---------------------------------------------------------
INTERNATIONAL              22      69      118      225
- ---------------------------------------------------------
INNOVATION                 21      64      110      209
- ---------------------------------------------------------
PRECIOUS METALS            21      64      110      209
</TABLE>
 
1. The Administrative Fees for each Fund are subject to reduction to the extent
that the average net assets attributable in the aggregate to the Fund's Class
A, Class B and Class C shares exceed $2.5 billion. See "Management of the 
Trust--Advisory and Adminis-trative Fees."
2. 12b-1 fees which are equal to .25% represent servicing fees which are paid
annually to the Distributor and repaid to partici-pating brokers, certain banks
and other financial intermediaries. 12b-1 fees which exceed .25% represent
aggregate distribution and servicing fees. See "Distributor and Distribution and
Servicing Plans."


                                                November 1, 1998 Prospectus   5
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                                 EXAMPLE: You would pay the
                                                                 following expenses on a $1,000
                                                                 investment assuming (1) 5%
                      ANNUAL FUND OPERATING EXPENSES             annual return and (2) redemption
CLASS                 (As a percentage of average net assets):   at the end of each time period:
C                                                     TOTAL
SHARES                          ADMINI-               FUND
                      ADVISORY  STRATIVE   12B-1      OPERATING  YEAR
FUND                  FEES      FEES(/1/)  FEES(/2/)  EXPENSES   1        3       5        10
- ---------------------------------------------------------------------------------------------------
<S>                   <C>       <C>        <C>        <C>        <C>      <C>     <C>      <C>
BALANCED              .45%      .40%       1.00%      1.85%          $29      $58     $100     $217
- ---------------------------------------------------------------------------------------------------
EQUITY INCOME         .45       .40        1.00       1.85            29       58      100      217
- ---------------------------------------------------------------------------------------------------
VALUE                 .45       .40        1.00       1.85            29       58      100      217
- ---------------------------------------------------------------------------------------------------
RENAISSANCE           .60       .40        1.00       2.00            30       63      108      233
- ---------------------------------------------------------------------------------------------------
TAX-EFFICIENT
 EQUITY               .45       .40        1.00       1.85            29       58       --       --
- ---------------------------------------------------------------------------------------------------
CAPITAL APPRECIATION  .45       .40        1.00       1.85            29       58      100      217
- ---------------------------------------------------------------------------------------------------
GROWTH                .50       .40        1.00       1.90            29       60      103      222
- ---------------------------------------------------------------------------------------------------
VALUE 25              .50       .40        1.00       1.90            29       60       --       --
- ---------------------------------------------------------------------------------------------------
MID-CAP GROWTH        .45       .40        1.00       1.85            29       58      100      217
- ---------------------------------------------------------------------------------------------------
TARGET                .55       .40        1.00       1.95            30       61      105      227
- ---------------------------------------------------------------------------------------------------
SMALL-CAP VALUE       .60       .40        1.00       2.00            30       63      108      233
- ---------------------------------------------------------------------------------------------------
OPPORTUNITY           .65       .40        1.00       2.05            31       64      110      238
- ---------------------------------------------------------------------------------------------------
INTERNATIONAL         .55       .65        1.00       2.20            32       69      118      253
- ---------------------------------------------------------------------------------------------------
INNOVATION            .65       .40        1.00       2.05            31       64      110      238
- ---------------------------------------------------------------------------------------------------
PRECIOUS METALS       .60       .45        1.00       2.05            31       64      110      238
<CAPTION>
                      EXAMPLE: You would pay the
                      following expenses on a $1,000
                      investment assuming (1) 5%
                      annual return and (2) no
                      redemption:
                      YEAR
FUND                  1       3       5        10
- -------------------------------------------------------                                             
<S>                   <C>     <C>     <C>      <C>
BALANCED                  $19     $58     $100     $217
- -------------------------------------------------------                                             
EQUITY INCOME              19      58      100      217
- -------------------------------------------------------                                             
VALUE                      19      58      100      217
- -------------------------------------------------------                                             
RENAISSANCE                20      63      108      233
- -------------------------------------------------------                                             
TAX-EFFICIENT
 EQUITY                    19      58       --       --
- -------------------------------------------------------                                             
CAPITAL APPRECIATION       19      58      100      217
- -------------------------------------------------------                                             
GROWTH                     19      60      103      222
- -------------------------------------------------------                                             
VALUE 25                   19      60       --       --
- -------------------------------------------------------                                             
MID-CAP GROWTH             19      58      100      217
- -------------------------------------------------------                                             
TARGET                     20      61      105      227
- -------------------------------------------------------                                             
SMALL-CAP VALUE            20      63      108      233
- -------------------------------------------------------                                             
OPPORTUNITY                21      64      110      238
- -------------------------------------------------------                                             
INTERNATIONAL              22      69      118      253
- -------------------------------------------------------                                             
INNOVATION                 21      64      110      238
- -------------------------------------------------------                                             
PRECIOUS METALS            21      64      110      238
</TABLE>
 
1. The Administrative Fees for each Fund are subject to reduction to the extent
that the average net assets attributable in the ag-gregate to the Fund's Class
A, Class B and Class C shares exceed $2.5 billion. See "Management of the
Trust--Advisory and Administrative Fees."
2. 12b-1 fees which are equal to .25% represent servicing fees which are paid
annually to the Distributor and repaid to partici-pating brokers, certain banks
and other financial intermediaries. 12b-1 fees which exceed .25% represent
aggregate distribution and servicing fees. See "Distributor and Distribution and
Servicing Plans."

The purpose of the foregoing tables is to assist investors in understanding
the various costs and expenses of the Trust that are borne directly or
indirectly by Class A, Class B and Class C shareholders of the Funds. The
information is based upon each Fund's current fees and expenses. The Examples
for Class A shares assume payment of the current maximum applicable sales load.
Due to the 12b-1 distribution fee imposed on Class B and Class C shares, a Class
B or Class C shareholder of the Trust may, depend-ing on the length of time the
shares are held, pay more than the economic equivalent of the maximum front-end
sales charges permit-ted by relevant rules of the National Association of
Securities Dealers, Inc.

NOTE: THE FIGURES SHOWN IN THE EXAMPLES ARE ENTIRELY HYPOTHETICAL. THEY ARE NOT
REPRESENTATIONS OF PAST OR FUTURE PERFORMANCE OR EX-PENSES; ACTUAL PERFORMANCE
AND/OR EXPENSES MAY BE MORE OR LESS THAN SHOWN.

 
6  PIMCO Funds: Multi-Manager Series
<PAGE>
 

 
 
 
                      (This page left blank intentionally)
 
 
 
                                                 November 1, 1998 Prospectus   7
<PAGE>
 

Financial Highlights
 
The financial highlights set forth on the following pages present certain in-
formation and ratios as well as performance information for the Funds that
were operational during the periods listed. Certain information provided below
is included in the June 30, 1998 PIMCO Funds Annual Report (relating to Class
A, B and C shares) and has been audited by PricewaterhouseCoopers LLP, inde-
pendent accountants, whose report thereon is also included in such Annual Re-
port. The Annual Report is incorporated by reference in the Statement of Addi-
tional Information and may be obtained without charge from the Distributor.
Financial Statements and related notes are also incorporated by reference in
the Statement of Additional Information.
 
<TABLE>
<CAPTION>
Selected Per Share Data                                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
for the Period Ended:    NET ASSET VALUE NET            UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET
                         BEGINNING       INVESTMENT     GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL
                         OF PERIOD       INCOME (LOSS)  INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS
                         --------------- -------------  -------------- --------------- ---------- ------------- ----------------
<S>                      <C>             <C>            <C>            <C>             <C>        <C>           <C>
BALANCED FUND
 Class A
 06/30/98                   $  11.40        $ 0.29 (a)      $ 1.81 (a)    $   2.10      $ (0.30)    $   0.00        $  (1.09)
 01/20/97-
  06/30/97                     10.77          0.21            0.58            0.79        (0.16)        0.00            0.00
 Class B
 06/30/98                      11.39          0.20 (a)        1.82 (a)        2.02        (0.25)        0.00           (1.09)
 01/20/97-
  06/30/97                     10.77          0.19            0.58            0.77        (0.15)        0.00            0.00
 Class C
 06/30/98                      11.39          0.20 (a)        1.82 (a)        2.02        (0.25)        0.00           (1.09)
 01/20/97-
  06/30/97                     10.77          0.18            0.58            0.76        (0.14)        0.00            0.00
EQUITY INCOME
 FUND
 Class A
 06/30/98                   $  15.39        $ 0.39 (a)      $ 2.73 (a)    $   3.12      $ (0.38)    $   0.00        $  (2.09)
 01/20/97-
  06/30/97                     13.94          0.15            1.48            1.63        (0.18)        0.00            0.00
 Class B
 06/30/98                      15.37          0.26 (a)        2.73 (a)        2.99        (0.28)        0.00           (2.09)
 01/20/97-
  06/30/97                     13.94          0.11            1.48            1.59        (0.16)        0.00            0.00
 Class C
 06/30/98                      15.37          0.26 (a)        2.74 (a)        3.00        (0.27)        0.00           (2.09)
 01/20/97-
  06/30/97                     13.94          0.11            1.48            1.59        (0.16)        0.00            0.00
VALUE FUND
 Class A
 06/30/98                   $  14.80        $ 0.19 (a)      $ 2.46 (a)    $   2.65      $ (0.18)    $   0.00        $  (1.63)
 01/13/97-
  06/30/97                     13.17          0.47            1.26            1.73        (0.10)        0.00            0.00
 Class B
 06/30/98                      14.80          0.07 (a)        2.46 (a)        2.53        (0.07)        0.00           (1.63)
 01/13/97-
  06/30/97                     13.16          0.44            1.26            1.70        (0.06)        0.00            0.00
 Class C
 06/30/98                      14.80          0.07 (a)        2.46 (a)        2.53        (0.07)        0.00           (1.63)
 01/13/97-
  06/30/97                     13.15          0.43            1.28            1.71        (0.06)        0.00            0.00
RENAISSANCE
 FUND (I)
 Class A
 06/30/98                   $  17.73        $ 0.07 (a)      $ 4.91 (a)    $   4.98      $ (0.08)    $   0.00        $  (3.53)
 10/01/96-
  06/30/97                     16.08          0.12 (a)        3.90 (a)        4.02        (0.12)        0.00           (2.25)
 09/30/96                      14.14          0.23            2.79            3.02        (0.23)       (0.07)          (0.78)
 09/30/95                      12.50          0.36            1.61            1.97        (0.33)        0.00            0.00
 09/30/94                      12.88          0.34           (0.17)           0.17        (0.33)        0.00           (0.22)
 09/30/93                      10.57          0.33            2.30            2.63        (0.32)        0.00            0.00
 09/30/92                       9.92          0.34            0.71            1.05        (0.40)        0.00            0.00
 02/1/91-
  09/30/91                      8.38          0.28            1.54            1.82        (0.28)        0.00            0.00
 Class B
 06/30/98                      17.77         (0.07)(a)        4.91 (a)        4.84        (0.02)        0.00           (3.53)
 10/01/96-
  06/30/97                     16.12          0.03 (a)        3.92 (a)        3.95        (0.05)        0.00           (2.25)
 09/30/96                      14.13          0.09            2.83            2.92        (0.11)       (0.04)          (0.78)
 05/22/95-
  09/30/95                     12.55          0.11            1.55            1.66        (0.08)        0.00            0.00
<CAPTION>
Selected Per Share Data  DISTRIBUTIONS
for the Period Ended:    IN EXCESS OF
                         NET REALIZED
                         CAPITAL GAINS
                         -------------
<S>                      <C>
BALANCED FUND
 Class A
 06/30/98                  $   0.00
 01/20/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
EQUITY INCOME
 FUND
 Class A
 06/30/98                  $   0.00
 01/20/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
VALUE FUND
 Class A
 06/30/98                  $   0.00
 01/13/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/13/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/13/97-
  06/30/97                     0.00
RENAISSANCE
 FUND (I)
 Class A
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 02/1/91-
  09/30/91                     0.00
 Class B
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 05/22/95-
  09/30/95                     0.00
</TABLE>
*Annualized
 (a)Per share amounts based upon average number of shares outstanding during
the period.
 (i) Formerly, the PIMCO Advisors Equity Income Fund. The information provided
     reflects results of operations under the Fund's former investment
     objective and policies through January 31, 1992; such results would not
     necessarily have been achieved had the Fund's current objective and
     policies then been in effect.


8   PIMCO Funds: Multi-Manager Series
<PAGE>
 
 
The information provided for each of the Renaissance, Growth, Target,
Opportunity, International, Innovation and Precious Metals Funds reflects the
opera tional history of a corresponding series of PIMCO Advisors Funds which
reorganized as a series of the Trust on January 17, 1997. In connection with the
re organizations, these Funds changed their fiscal year ends from September 30
to June 30. The expense ratios provided for these Funds reflect fee arrangements
of PIMCO Advisors Funds in effect prior to January 17, 1997 which differ from
the current fee arrangements of the Trust.
 
<TABLE>
<CAPTION>
                                                                                              RATIO OF NET
                                                                                  RATIO OF    INVESTMENT
DISTRIBUTIONS  TAX BASIS               NET ASSET                                  EXPENSES TO INCOME (LOSS) TO
FROM           RETURN OF TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET AVERAGE NET      PORTFOLIO
EQUALIZATION   CAPITAL   DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000S) ASSETS      ASSETS           TURNOVER RATE
- -------------  --------- ------------- ------------ ------------ ---------------- ----------- ---------------- -------------
<S>            <C>       <C>           <C>          <C>          <C>              <C>         <C>              <C>
 
 
  $   0.00     $   0.00    $  (1.39)     $  12.11       19.40%       $  9,586         1.12%          2.47%            186%
      0.00         0.00       (0.16)        11.40        7.42             366         1.15*          3.01*            199
 
      0.00         0.00       (1.34)        12.07       18.59           8,977         1.86           1.71             186
      0.00         0.00       (0.15)        11.39        7.15           1,124         1.90*          2.28*            199
 
      0.00         0.00       (1.34)        12.07       18.59           8,469         1.86           1.71             186
      0.00         0.00       (0.14)        11.39        7.12             921         1.90*          2.26*            199
 
 
  $   0.00     $   0.00    $  (2.47)     $  16.04       21.35%       $ 12,954         1.11%          2.39%             45%
      0.00         0.00       (0.18)        15.39       11.77           1,756         1.13*          2.85*             45
 
      0.00         0.00       (2.37)        15.99       20.47          15,178         1.85           1.63              45
      0.00         0.00       (0.16)        15.37       11.45           2,561         1.87*          2.11*             45
 
      0.00         0.00       (2.36)        16.01       20.51          23,122         1.85           1.60              45
      0.00         0.00       (0.16)        15.37       11.42           6,624         1.87*          2.15*             45
 
 
  $   0.00     $   0.00    $  (1.81)     $  15.64       18.86%       $ 21,742         1.11%          1.19%             77%
      0.00         0.00       (0.10)        14.80       13.19          15,648         1.11*          1.71*             71
 
      0.00         0.00       (1.70)        15.63       17.98          35,716         1.86           0.45              77
      0.00         0.00       (0.06)        14.80       12.93          25,433         1.86*          0.96*             71
 
      0.00         0.00       (1.70)        15.63       17.98          88,235         1.86           0.45              77
      0.00         0.00       (0.06)        14.80       13.02          64,110         1.86*          0.97*             71
 
 
  $   0.00     $   0.00    $  (3.61)     $  19.10       30.98%       $ 85,562         1.26%          0.35%            192%
      0.00         0.00       (2.37)        17.73       27.53          33,606         1.23*          0.95*            131
      0.00         0.00       (1.08)        16.08       22.37          20,631         1.25           1.60             203
      0.00         0.00       (0.33)        14.14       16.10          12,933         1.30           2.90             177
      0.00         0.00       (0.55)        12.50        1.40          14,942         1.30           2.70             175
      0.00         0.00       (0.32)        12.88       25.30           6,328         1.30           2.90             168
      0.00         0.00       (0.40)        10.57       10.70           2,593         1.40           3.30             149
      0.00         0.00       (0.28)         9.92       34.80              15         1.60*          4.40*            143
 
      0.00         0.00       (3.55)        19.06       29.99         100,688         2.01          (0.39)            192
      0.00         0.00       (2.30)        17.77       26.88          37,253         1.97*          0.20*            131
      0.00         0.00       (0.93)        16.12       21.54          15,693         2.00           0.85             203
      0.00         0.00       (0.08)        14.13       13.30           1,760         2.10*          2.20*            177
 
</TABLE>



                                                 November 1, 1998 Prospectus   9
<PAGE>
 

Financial Highlights (continued)
 
<TABLE>
<CAPTION>
 
Selected Per Share Data                                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
for the Period Ended:    NET ASSET VALUE NET            UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET
                         BEGINNING       INVESTMENT     GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL
                         OF PERIOD       INCOME (LOSS)  INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS
                         --------------- -------------  -------------- --------------- ---------- ------------- ----------------
<S>                      <C>             <C>            <C>            <C>             <C>        <C>           <C>
RENAISSANCE FUND
 (CONT.)
 Class C
 06/30/98                   $  17.69        $(0.07)(a)      $ 4.88 (a)    $   4.81      $ (0.01)    $   0.00        $  (3.53)
 10/01/96-
  06/30/97                     16.05          0.03 (a)        3.90 (a)        3.93        (0.04)        0.00           (2.25)
 09/30/96                      14.09          0.12            2.78            2.90        (0.13)       (0.03)          (0.78)
 09/30/95                      12.47          0.27            1.59            1.86        (0.24)        0.00            0.00
 09/30/94                      12.85          0.24           (0.16)           0.08        (0.24)        0.00           (0.22)
 09/30/93                      10.56          0.25            2.29            2.54        (0.25)        0.00            0.00
 09/30/92                       9.91          0.29            0.68            0.97        (0.32)        0.00            0.00
 09/30/91                       8.16          0.36            1.75            2.11        (0.36)        0.00            0.00
 09/30/90                      11.17          0.49           (2.32)          (1.83)       (0.49)        0.00           (0.69)
 09/30/89                      10.05          0.55            1.19            1.74        (0.62)        0.00            0.00
CAPITAL APPRECI-
 ATION FUND
 Class A
 06/30/98                   $  21.16        $ 0.07 (a)      $ 6.55 (a)    $   6.62      $ (0.09)    $   0.00        $  (1.68)
 01/20/97-
  06/30/97                     19.31          0.09            1.76            1.85         0.00         0.00            0.00
 Class B
 06/30/98                      21.10         (0.11)(a)        6.51 (a)        6.40        (0.07)        0.00           (1.68)
 01/20/97-
  06/30/97                     19.31          0.01            1.78            1.79         0.00         0.00            0.00
 Class C
 06/30/98                      21.10         (0.12)(a)        6.53 (a)        6.41        (0.05)        0.00           (1.68)
 01/20/97-
  06/30/97                     19.31          0.02            1.77            1.79         0.00         0.00            0.00
GROWTH FUND
 Class A
 06/30/98                   $  27.03        $(0.08)(a)      $ 9.99 (a)    $   9.91      $  0.00     $   0.00        $  (4.32)
 10/01/96-
  06/30/97                     26.58          0.69            3.27            3.96         0.00         0.00           (3.51)
 09/30/96                      25.73          0.06            3.72            3.78         0.00         0.00           (2.93)
 09/30/95                      22.01          0.12            4.79            4.91         0.00         0.00           (1.19)
 09/30/94                      23.64          0.12            0.12            0.24         0.00         0.00           (1.87)
 09/30/93                      20.76          0.09            3.53            3.62         0.00         0.00           (0.74)
 09/30/92                      20.63          0.14            1.38            1.52        (0.14)        0.00           (1.25)
 10/26/90-
  09/30/91                     16.99          0.21            5.28            5.49        (0.19)        0.00           (1.66)
 Class B
 06/30/98                      25.59         (0.28)(a)        9.35 (a)        9.07         0.00         0.00           (4.32)
 10/01/96-
  06/30/97                     25.46          0.35            3.29            3.64         0.00         0.00           (3.51)
 09/30/96                      24.94         (0.07)           3.52            3.45         0.00         0.00           (2.93)
 05/23/95-
  09/30/95                     22.63         (0.03)           2.34            2.31         0.00         0.00            0.00
 Class C
 06/30/98                      25.58         (0.28)(a)        9.35 (a)        9.07         0.00         0.00           (4.32)
 10/01/96-
  06/30/97                     25.46          0.45            3.18            3.63         0.00         0.00           (3.51)
 09/30/96                      24.94         (0.12)           3.57            3.45         0.00         0.00           (2.93)
 09/30/95                      21.52         (0.04)           4.65            4.61         0.00         0.00           (1.19)
 09/30/94                      23.32         (0.04)           0.11            0.07         0.00         0.00           (1.87)
 09/30/93                      20.64         (0.07)           3.49            3.42         0.00         0.00           (0.74)
 09/30/92                      20.54         (0.01)           1.37            1.36        (0.01)        0.00           (1.25)
 09/30/91                      16.93          0.12            5.32            5.44        (0.17)        0.00           (1.66)
 09/30/90                      19.71          0.19           (1.67)          (1.48)       (0.18)        0.00           (1.12)
 09/30/89                      13.93          0.11            5.77            5.88        (0.10)        0.00            0.00
MID-CAP GROWTH
 FUND
 Class A
 06/30/98                   $  20.24        $ 0.02 (a)      $ 5.11 (a)    $   5.13      $ (0.04)    $   0.00        $  (1.33)
 01/13/97-
  06/30/97                     18.14         (0.04)           2.14            2.10         0.00         0.00            0.00
 Class B
 06/30/98                      20.17         (0.16)(a)        5.09 (a)        4.93         0.00         0.00           (1.33)
 01/13/97-
  06/30/97                     18.14         (0.11)           2.14            2.03         0.00         0.00            0.00
 Class C
 06/30/98                      20.18         (0.16)(a)        5.08 (a)        4.92         0.00         0.00           (1.33)
 01/13/97-
  06/30/97                     18.14         (0.10)           2.14            2.04         0.00         0.00            0.00
<CAPTION>
 
Selected Per Share Data  DISTRIBUTIONS
for the Period Ended:    IN EXCESS OF
                         NET REALIZED
                         CAPITAL GAINS
                         -------------
<S>                      <C>
RENAISSANCE FUND
 (CONT.)
 Class C
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 09/30/91                      0.00
 09/30/90                      0.00
 09/30/89                      0.00
CAPITAL APPRECI-
 ATION FUND
 Class A
 06/30/98                  $   0.00
 01/20/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
GROWTH FUND
 Class A
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 10/26/90-
  09/30/91                     0.00
 Class B
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 05/23/95-
  09/30/95                     0.00
 Class C
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 09/30/91                      0.00
 09/30/90                      0.00
 09/30/89                      0.00
MID-CAP GROWTH
 FUND
 Class A
 06/30/98                  $   0.00
 01/13/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/13/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/13/97-
  06/30/97                     0.00
</TABLE>
*Annualized
 (a)Per share amounts based upon average number of shares outstanding during
the period.



10   PIMCO Funds: Multi-Manager Series
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                                                              RATIO OF NET
                                                                                  RATIO OF    INVESTMENT
DISTRIBUTIONS  TAX BASIS               NET ASSET                                  EXPENSES TO INCOME (LOSS) TO
FROM           RETURN OF TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET AVERAGE NET      PORTFOLIO
EQUALIZATION   CAPITAL   DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000S) ASSETS      ASSETS           TURNOVER RATE
- -------------  --------- ------------- ------------ ------------ ---------------- ----------- ---------------- -------------
<S>            <C>       <C>           <C>          <C>          <C>              <C>         <C>              <C>
 
  $   0.00     $   0.00    $  (3.54)     $  18.96       29.98%       $ 469,797        2.01%         (0.37)%           192%
      0.00         0.00       (2.29)        17.69       26.86          313,226        1.97*          0.21*            131
      0.00         0.00       (0.94)        16.05       21.52          230,058        2.00           0.85             203
      0.00         0.00       (0.24)        14.09       15.20          174,316        2.10           2.10             177
      0.00         0.00       (0.46)        12.47        0.70          178,892        2.00           2.00             175
      0.00         0.00       (0.25)        12.85       24.40           94,247        2.10           2.20             168
      0.00         0.00       (0.32)        10.56        9.90           45,101        2.10           2.70             149
      0.00         0.00       (0.36)         9.91       26.50           22,651        2.20           4.20             143
      0.00         0.00       (1.18)         8.16      (18.00)          25,758        2.00           5.10              70
      0.00         0.00       (0.62)        11.17       17.90           45,168        1.90           5.20              85
 
 
  $   0.00     $   0.00    $  (1.77)     $  26.01       32.39%       $  72,803        1.10%          0.27%             75%
      0.00         0.00        0.00         21.16        9.58            6,534        1.11*          0.59*             87
      0.00         0.00       (1.75)        25.75       31.39           40,901        1.85          (0.47)             75
      0.00         0.00        0.00         21.10        9.27            3,022        1.85*         (0.26)*            87
 
      0.00         0.00       (1.73)        25.78       31.40           71,481        1.85          (0.49)             75
      0.00         0.00        0.00         21.10        9.27           13,093        1.86*         (0.23)*            87
 
 
  $   0.00     $   0.00    $  (4.32)     $  32.62       41.03%       $ 180,119        1.16%         (0.27)%           123%
      0.00         0.00       (3.51)        27.03       15.93          147,276        1.11*          0.13*             94
      0.00         0.00       (2.93)        26.58       16.11          151,103        1.11           0.24             104
      0.00         0.00       (1.19)        25.73       23.70          134,819        1.10           0.50             111
      0.00         0.00       (1.87)        22.01        1.30          107,269        1.10           0.60             115
      0.00         0.00       (0.74)        23.64       17.70           97,509        1.10           0.40             110
      0.00         0.00       (1.39)        20.76        7.70           71,209        1.10           0.70              92
      0.00         0.00       (1.85)        20.63       38.60           17,064        1.20*          0.90*             95
 
      0.00         0.00       (4.32)        30.34       39.97           80,719        1.91          (1.02)            123
      0.00         0.00       (3.51)        25.59       15.32           55,626        1.86*         (0.62)*            94
      0.00         0.00       (2.93)        25.46       15.22           37,256        1.86          (0.51)            104
      0.00         0.00        0.00         24.94       10.20            7,671        1.90*         (0.40)*           111
 
      0.00         0.00       (4.32)        30.33       39.99        1,853,002        1.91          (1.02)            123
      0.00         0.00       (3.51)        25.58       15.27        1,514,432        1.86*         (0.61)*            94
      0.00         0.00       (2.93)        25.46       15.22        1,450,216        1.86          (0.51)            104
      0.00         0.00       (1.19)        24.94       22.80        1,290,152        1.90          (0.20)            111
      0.00         0.00       (1.87)        21.52        0.50        1,085,427        1.90          (0.20)            115
      0.00         0.00       (0.74)        23.32       16.90        1,077,490        1.90          (0.30)            110
      0.00         0.00       (1.26)        20.64        6.90          853,121        1.90          (0.10)             92
      0.00         0.00       (1.83)        20.54       35.10          564,398        1.80           0.60              95
      0.00         0.00       (1.30)        16.93       (8.00)         314,075        1.70           1.00              89
      0.00         0.00       (0.10)        19.71       42.40          373,490        1.70           0.70              83
 
  $   0.00     $   0.00    $  (1.37)     $  24.00       25.71%       $  57,164        1.11%          0.07%             66%
      0.00         0.00        0.00         20.24       11.58           12,184        1.11*          0.17*             82
 
      0.00         0.00       (1.33)        23.77       24.76           84,535        1.86          (0.68)             66
      0.00         0.00        0.00         20.17       11.19           28,259        1.85*         (0.58)*            82
 
      0.00         0.00       (1.33)        23.77       24.70          140,438        1.86          (0.68)             66
      0.00         0.00        0.00         20.18       11.25           53,686        1.86*         (0.58)*            82
 
 
</TABLE>


                                                 November 1, 1998 Prospectus  11
<PAGE>
 
Financial Highlights (continued)
 
 
 
<TABLE>
<CAPTION>
Selected Per Share Data                                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
for the Period Ended:    NET ASSET VALUE NET            UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET
                         BEGINNING       INVESTMENT     GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL
                         OF PERIOD       INCOME (LOSS)  INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS
                         --------------- -------------  -------------- --------------- ---------- ------------- ----------------
<S>                      <C>             <C>            <C>            <C>             <C>        <C>           <C>
TARGET FUND
 Class A
 06/30/98                   $  16.82        $(0.08)(a)      $ 4.06 (a)    $   3.98      $  0.00     $   0.00        $  (4.45)
 10/01/96-
  06/30/97                     17.11         (0.04)(a)        1.82 (a)        1.78         0.00         0.00           (2.07)
 09/30/96                      16.40         (0.05)           2.54            2.49         0.00         0.00           (1.78)
 09/30/95                      13.13         (0.02)           3.45            3.43         0.00         0.00           (0.16)
 09/30/94                      12.72         (0.04)           0.57            0.53         0.00         0.00           (0.12)
 12/17/92-
  09/30/93                     10.00         (0.02)           2.74            2.72         0.00         0.00            0.00
 Class B
 06/30/98                      16.14         (0.19)(a)        3.84 (a)        3.65         0.00         0.00           (4.45)
 10/01/96-
  06/30/97                     16.58         (0.12)(a)        1.75 (a)        1.63         0.00         0.00           (2.07)
 09/30/96                      16.06         (0.09)           2.39            2.30         0.00         0.00           (1.78)
 05/22/95-
  09/30/95                     13.93         (0.05)           2.18            2.13         0.00         0.00            0.00
 Class C
 06/30/98                      16.13         (0.19)(a)        3.85 (a)        3.66         0.00         0.00           (4.45)
 10/01/96-
  06/30/97                     16.58         (0.12)(a)        1.74 (a)        1.62         0.00         0.00           (2.07)
 09/30/96                      16.05         (0.16)           2.47            2.31         0.00         0.00           (1.78)
 09/30/95                      12.95         (0.12)           3.38            3.26         0.00         0.00           (0.16)
 09/30/94                      12.65         (0.14)           0.56            0.42         0.00         0.00           (0.12)
 12/17/92-
  9/30/93                      10.00         (0.09)           2.74            2.65         0.00         0.00            0.00
SMALL-CAP
 VALUE FUND
 Class A
 06/30/98                   $  15.75        $ 0.23 (a)      $ 2.49 (a)    $   2.72      $ (0.13)    $   0.00        $  (0.76)
 01/20/97-
  06/30/97                     14.02          0.10            1.63            1.73         0.00         0.00            0.00
 Class B
 06/30/98                      15.71          0.09 (a)        2.48 (a)        2.57        (0.09)        0.00           (0.76)
 01/20/97-
  06/30/97                     14.02          0.08            1.61            1.69         0.00         0.00            0.00
 Class C
 06/30/98                      15.71          0.09 (a)        2.49 (a)        2.58        (0.09)        0.00           (0.76)
 01/20/97-
  06/30/97                     14.02          0.08            1.61            1.69         0.00         0.00            0.00
OPPORTUNITY
 FUND
 Class A
 06/30/98                   $  29.35        $(0.27)(a)      $ 4.19 (a)    $   3.92      $  0.00     $   0.00        $  (1.94)
 10/01/96-
  06/30/97                     37.36          0.00           (3.10)          (3.10)        0.00         0.00           (4.91)
 09/30/96                      39.08         (0.11)           6.12            6.01         0.00         0.00           (7.73)
 09/30/95                      28.87         (0.11)          11.19           11.08         0.00         0.00           (0.87)
 09/30/94                      33.43         (0.17)          (2.02)          (2.19)        0.00         0.00           (2.26)
 09/30/93                      19.84         (0.15)          14.00           13.85         0.00         0.00           (0.26)
 09/30/92                      17.95         (0.04)           3.61            3.57         0.00         0.00           (1.68)
 12/17/90-
  09/30/91                     11.78         (0.03)           6.20            6.17         0.00         0.00            0.00
 Class C
 06/30/98                      27.38         (0.46)(a)        3.88 (a)        3.42         0.00         0.00           (1.94)
 10/01/96-
  06/30/97                     35.38         (0.04)          (3.05)          (3.09)        0.00         0.00           (4.91)
 09/30/96                      37.64         (0.35)           5.82            5.47         0.00         0.00           (7.73)
 09/30/95                      28.04         (0.34)          10.81           10.47         0.00         0.00           (0.87)
 09/30/94                      32.77         (0.38)          (1.98)          (2.36)        0.00         0.00           (2.26)
 09/30/93                      19.60         (0.34)          13.77           13.43         0.00         0.00           (0.26)
 09/30/92                      17.87         (0.18)           3.59            3.41         0.00         0.00           (1.68)
 09/30/91                      11.93         (0.11)           6.42            6.31         0.00         0.00           (0.37)
 09/30/90                      15.78         (0.01)          (2.13)          (2.14)        0.00         0.00           (1.71)
 09/30/89                      11.84         (0.03)           3.97            3.94         0.00         0.00            0.00
<CAPTION>
Selected Per Share Data  DISTRIBUTIONS
for the Period Ended:    IN EXCESS OF
                         NET REALIZED
                         CAPITAL GAINS
                         -------------
<S>                      <C>
TARGET FUND
 Class A
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 12/17/92-
  09/30/93                     0.00
 Class B
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 05/22/95-
  09/30/95                     0.00
 Class C
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 12/17/92-
  9/30/93                      0.00
SMALL-CAP
 VALUE FUND
 Class A
 06/30/98                  $   0.00
 01/20/97-
  06/30/97                     0.00
 Class B
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
 Class C
 06/30/98                      0.00
 01/20/97-
  06/30/97                     0.00
OPPORTUNITY
 FUND
 Class A
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 12/17/90-
  09/30/91                     0.00
 Class C
 06/30/98                      0.00
 10/01/96-
  06/30/97                     0.00
 09/30/96                      0.00
 09/30/95                      0.00
 09/30/94                      0.00
 09/30/93                      0.00
 09/30/92                      0.00
 09/30/91                      0.00
 09/30/90                      0.00
 09/30/89                      0.00
</TABLE>
 
*Annualized
 (a) Per share amounts based upon average number of shares outstanding during
     the period.


12  PIMCO Funds: Multi-Manager Series
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                               RATIO OF NET
                                                                                   RATIO OF    INVESTMENT
DISTRIBUTIONS  TAX BASIS                NET ASSET                                  EXPENSES TO INCOME (LOSS) TO
FROM           RETURN OF  TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET AVERAGE NET      PORTFOLIO
EQUALIZATION   CAPITAL    DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000S) ASSETS      ASSETS           TURNOVER RATE
- -------------  ---------  ------------- ------------ ------------ ---------------- ----------- ---------------- -------------
<S>            <C>        <C>           <C>          <C>          <C>              <C>         <C>              <C>
 
 
  $   0.00     $   0.00     $  (4.45)     $  16.35       27.49 %      $157,277         1.22%         (0.49)%           226%
      0.00         0.00        (2.07)        16.82       11.19         150,689         1.20*         (0.31)*           145
      0.00         0.00        (1.78)        17.11       16.50         156,027         1.18          (0.34)            141
      0.00         0.00        (0.16)        16.40       26.50         121,915         1.20          (0.10)            128
      0.00         0.00        (0.12)        13.13        4.20          90,527         1.20          (0.30)            104
      0.00         0.00         0.00         12.72       27.20          48,787         1.30*         (0.30)*            76
 
      0.00         0.00        (4.45)        15.34       26.45          76,194         1.96          (1.24)            226
      0.00         0.00        (2.07)        16.14       10.58          67,531         1.94*         (1.05)*           145
      0.00         0.00        (1.78)        16.58       15.58          49,851         1.93          (1.09)            141
      0.00         0.00         0.00         16.06       15.30           7,554         2.00*         (0.90)*           128
 
      0.00         0.00        (4.45)        15.34       26.53         952,728         1.96          (1.24)            226
      0.00         0.00        (2.07)        16.13       10.52         969,317         1.94*         (1.06)*           145
      0.00         0.00        (1.78)        16.58       15.66         974,948         1.93          (1.09)            141
      0.00         0.00        (0.16)        16.05       25.60         780,355         2.00          (0.90)            128
      0.00         0.00        (0.12)        12.95        3.40         556,043         2.00          (1.10)            104
      0.00         0.00         0.00         12.65       26.50         298,238         2.00*         (1.00)*            76
  $   0.00     $   0.00     $  (0.89)     $  17.58       17.33 %      $ 75,070         1.25%          1.27%             41%
      0.00         0.00         0.00         15.75       12.34           6,563         1.30*          1.94*             48
 
      0.00         0.00        (0.85)        17.43       16.40         110,833         2.00           0.53              41
      0.00         0.00         0.00         15.71       12.05          11,077         2.04*          1.23*             48
 
      0.00         0.00        (0.85)        17.44       16.42         130,466         2.00           0.52              41
      0.00         0.00         0.00         15.71       12.05          20,637         2.05*          1.13*             48
 
 
  $   0.00     $   0.00     $  (1.94)     $  31.33       13.87 %      $200,935         1.31%         (0.88)%            86%
      0.00         0.00        (4.91)        29.35       (8.87)        213,484         1.25*         (0.12)*            69
      0.00         0.00        (7.73)        37.36       18.35         134,859         1.13          (0.32)             91
      0.00         0.00        (0.87)        39.08       39.70         120,830         1.20          (0.40)            102
      0.00        (0.11)       (2.37)        28.87       (6.70)         95,261         1.10          (0.60)             78
      0.00         0.00        (0.26)        33.43       70.40         106,666         1.20          (0.60)            105
      0.00         0.00        (1.68)        19.84       21.60          22,454         1.30          (0.20)             94
      0.00         0.00         0.00         17.95       70.90           1,623         1.40*         (0.50)*           145
 
      0.00         0.00        (1.94)        28.86       13.01         500,011         2.06          (1.63)             86
      0.00         0.00        (4.91)        27.38       (9.40)        629,446         1.97*         (0.95)*            69
      0.00         0.00        (7.73)        35.38       17.47         800,250         1.88          (1.07)             91
      0.00         0.00        (0.87)        37.64       38.60         715,191         1.90          (1.10)            102
      0.00        (0.11)       (2.37)        28.04       (7.40)        553,460         1.90          (1.40)             78
      0.00         0.00        (0.26)        32.77       69.10         618,193         2.00          (1.30)            105
      0.00         0.00        (1.68)        19.60       20.80         179,081         2.00          (1.00)             94
      0.00         0.00        (0.37)        17.87       54.40          58,656         2.00          (0.80)            145
      0.00         0.00        (1.71)        11.93      (14.80)         33,472         1.90          (0.10)            106
      0.00         0.00         0.00         15.78       33.30          51,680         1.90          (0.20)            153
</TABLE>



                                                November 1, 1998 Prospectus   13
<PAGE>
 

Financial Highlights (continued)
 
<TABLE>
<CAPTION>
Selected Per Share Data                                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
for the Period Ended:    NET ASSET VALUE NET            UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET
                         BEGINNING       INVESTMENT     GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL
                         OF PERIOD       INCOME (LOSS)  INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS
                         --------------- -------------  -------------- --------------- ---------- ------------- ----------------
<S>                      <C>             <C>            <C>            <C>             <C>        <C>           <C>
INTERNATIONAL
 FUND (II)
 Class A
 06/30/98                   $  14.26        $ 0.06 (a)      $ 1.13 (a)    $   1.19      $  0.00     $   0.00        $  (0.82)
 10/01/96-
  06/30/97                     13.03          0.29            1.33            1.62         0.00         0.00           (0.39)
 9/30/96                       12.19          0.07            0.77            0.84         0.00         0.00            0.00
 9/30/95                       12.92          0.07           (0.56)          (0.49)        0.00         0.00           (0.24)
 9/30/94                       12.17          0.04            0.94            0.98         0.00         0.00           (0.23)
 9/30/93                       10.04          0.07            2.80            2.87         0.00         0.00           (0.74)
 9/30/92                       10.54          0.05           (0.37)          (0.32)        0.00         0.00           (0.18)
 2/1/91-9/30/91                 9.48          0.02            1.04            1.06         0.00         0.00            0.00
 Class B
 06/30/98                      13.56         (0.05)(a)        1.07 (a)        1.02         0.00         0.00           (0.82)
 10/01/96-
  06/30/97                     12.48          0.16            1.31            1.47         0.00         0.00           (0.39)
 9/30/96                       11.75          0.00 (a)        0.73 (a)        0.73         0.00         0.00            0.00
 5/22/95-
  9/30/95                      11.30          0.00            0.45            0.45         0.00         0.00            0.00
 Class C
 06/30/98                      13.55         (0.06)(a)        1.08 (a)        1.02         0.00         0.00           (0.82)
 10/01/96-
  06/30/97                     12.47          0.18            1.29            1.47         0.00         0.00           (0.39)
 9/30/96                       11.75         (0.05)           0.77            0.72         0.00         0.00            0.00
 9/30/95                       12.56         (0.02)          (0.55)          (0.57)        0.00         0.00           (0.24)
 9/30/94                       11.92         (0.06)           0.93            0.87         0.00         0.00           (0.23)
 9/30/93                        9.92         (0.01)           2.75            2.74         0.00         0.00           (0.74)
 9/30/92                       10.49         (0.06)          (0.33)          (0.39)        0.00         0.00           (0.18)
 9/30/91                       10.04         (0.08)           1.76            1.68         0.00         0.00           (1.23)
 9/30/90                       13.33         (0.10)          (2.02)          (2.12)        0.00         0.00           (1.17)
 9/30/89                       10.07         (0.18)           3.44            3.26         0.00         0.00            0.00
INNOVATION FUND
 Class A
 06/30/98                   $  17.43        $(0.19)(a)      $ 8.21 (a)    $   8.02      $  0.00     $   0.00        $  (0.99)
 10/01/96-
  06/30/97                     17.26          0.07            0.36            0.43         0.00         0.00           (0.26)
 9/30/96                       14.74         (0.07)           2.94            2.87         0.00         0.00           (0.35)
 12/22/94-
  9/30/95                      10.00         (0.06)(b)        4.80            4.74         0.00         0.00            0.00
 Class B
 06/30/98                      17.10         (0.33)(a)        8.00 (a)        7.67         0.00         0.00           (0.99)
 10/01/96-
  06/30/97                     17.04         (0.03)           0.35            0.32         0.00         0.00           (0.26)
 9/30/96                       14.66         (0.11)           2.84            2.73         0.00         0.00           (0.35)
 5/22/95-
  9/30/95                      11.81         (0.08)           2.93            2.85         0.00         0.00            0.00
 Class C
 06/30/98                      17.09         (0.33)(a)        8.00 (a)        7.67         0.00         0.00           (0.99)
 10/01/96-
  06/30/97                     17.04         (0.02)           0.33            0.31         0.00         0.00           (0.26)
 9/30/96                       14.65         (0.15)           2.89            2.74         0.00         0.00           (0.35)
 12/22/94-
  9/30/95                      10.00         (0.13)(b)        4.78            4.65         0.00         0.00            0.00
<CAPTION>
Selected Per Share Data  DISTRIBUTIONS
for the Period Ended:    IN EXCESS OF
                         NET REALIZED
                         CAPITAL GAINS
                         -------------
<S>                      <C>
INTERNATIONAL
 FUND (II)
 Class A
 06/30/98                  $  (0.30)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 9/30/95                       0.00
 9/30/94                       0.00
 9/30/93                       0.00
 9/30/92                       0.00
 2/1/91-9/30/91                0.00
 Class B
 06/30/98                     (0.30)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 5/22/95-
  9/30/95                      0.00
 Class C
 06/30/98                     (0.30)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 9/30/95                       0.00
 9/30/94                       0.00
 9/30/93                       0.00
 9/30/92                       0.00
 9/30/91                       0.00
 9/30/90                       0.00
 9/30/89                       0.00
INNOVATION FUND
 Class A
 06/30/98                  $  (0.18)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 12/22/94-
  9/30/95                      0.00
 Class B
 06/30/98                     (0.18)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 5/22/95-
  9/30/95                      0.00
 Class C
 06/30/98                     (0.18)
 10/01/96-
  06/30/97                     0.00
 9/30/96                       0.00
 12/22/94-
  9/30/95                      0.00
</TABLE>
*Annualized
 (a)  Per share amounts based upon average number of shares outstanding during
      the period.
 (b)  Reflecting voluntary waiver of investment advisory fee of $4,666 (0.00
      per share) by the Adviser.
 (ii) The information provided for the International Fund reflects results of
      operations under the Fund's former investment objective and policies
      through August 31, 1992; such results would not necessarily have been
      achieved had the Fund's current objective and policies then been in
      effect. On November 15, 1994, Blairlogie became the Portfolio Manager of
      the Fund.



14   PIMCO Funds: Multi-Manager Series

<PAGE>
 
 
<TABLE>
<CAPTION>
                                                                                              RATIO OF NET
                                                                                  RATIO OF    INVESTMENT
DISTRIBUTIONS  TAX BASIS               NET ASSET                                  EXPENSES TO INCOME (LOSS) TO
FROM           RETURN OF TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET AVERAGE NET      PORTFOLIO
EQUALIZATION   CAPITAL   DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000S) ASSETS      ASSETS           TURNOVER RATE
- -------------  --------- ------------- ------------ ------------ ---------------- ----------- ---------------- -------------
<S>            <C>       <C>           <C>          <C>          <C>              <C>         <C>              <C>
  $   0.00     $   0.00    $  (1.12)     $  14.33        9.95 %      $ 12,510         1.48%          0.41%             60%
      0.00         0.00       (0.39)        14.26       12.82          18,287         1.51*          0.58*             59
      0.00         0.00        0.00         13.03        6.89          20,056         1.41           0.49             110
      0.00         0.00       (0.24)        12.19       (3.70)         17,951         1.50           0.60             170
      0.00         0.00       (0.23)        12.92        8.20          23,289         1.40           0.30              55
      0.00         0.00       (0.74)        12.17       30.40          11,992         1.40           0.60              68
      0.00         0.00       (0.18)        10.04       (3.10)            471         1.90           0.50             160
      0.00         0.00        0.00         10.54       17.30              22         1.90*          0.70*            107
 
      0.00         0.00       (1.12)        13.46        9.17           8,956         2.22          (0.37)             60
      0.00         0.00       (0.39)        13.56       12.17           8,676         2.26*          0.18*             59
      0.00         0.00        0.00         12.48        6.21           5,893         2.16          (0.26)            110
      0.00         0.00        0.00         11.75        4.00             503         2.30*         (0.10)*           170
      0.00         0.00       (1.12)        13.45        9.18         132,986         2.22          (0.43)             60
      0.00         0.00       (0.39)        13.55       12.18         168,446         2.25*         (0.25)*            59
      0.00         0.00        0.00         12.47        6.13         203,544         2.16          (0.26)            110
      0.00         0.00       (0.24)        11.75       (4.50)        215,349         2.20          (0.20)            170
      0.00         0.00       (0.23)        12.56        7.40         294,492         2.20          (0.50)             55
      0.00         0.00       (0.74)        11.92       29.40         147,194         2.20          (0.10)             68
      0.00         0.00       (0.18)         9.92       (3.80)         28,299         2.60          (0.60)            160
      0.00         0.00       (1.23)        10.49       18.30          33,594         2.60          (0.20)            107
      0.00         0.00       (1.17)        10.04      (17.40)         36,282         2.30          (0.30)             93
      0.00         0.00        0.00         13.33       32.40          56,150         2.30          (0.70)             84
 
 
  $   0.00     $   0.00    $  (1.17)     $  24.28       48.10 %      $ 85,800         1.31%         (0.94)%           100%
      0.00         0.00       (0.26)        17.43        2.41          56,215         1.28*         (0.68)*            80
      0.00         0.00       (0.35)        17.26       19.86          50,067         1.31          (0.61)            123
      0.00         0.00        0.00         14.74       47.40          28,239         1.40*         (0.60)*            86
 
      0.00         0.00       (1.17)        23.60       46.95          81,130         2.06          (1.69)            100
      0.00         0.00       (0.26)        17.10        1.79          51,472         2.03*         (1.43)*            80
      0.00         0.00       (0.35)        17.04       18.99          33,778         2.06          (1.36)            123
      0.00         0.00        0.00         14.66       24.10           6,509         2.30*         (1.70)*            86
      0.00         0.00       (1.17)        23.59       46.97         219,258         2.06          (1.69)            100
      0.00         0.00       (0.26)        17.09        1.73         162,889         2.03*         (1.43)*            80
      0.00         0.00       (0.35)        17.04       19.08         137,752         2.06          (1.36)            123
      0.00         0.00        0.00         14.65       46.50          63,952         2.20*         (1.40)*            86
 
 
</TABLE>
                                                November 1, 1998 Prospectus   15
<PAGE>
 

Financial Highlights (continued)
 
<TABLE>
<CAPTION>
Selected Per Share Data                                 NET REALIZED/                  DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
for the Period Ended:    NET ASSET VALUE NET            UNREALIZED     TOTAL INCOME    FROM NET   EXCESS OF NET FROM NET
                         BEGINNING       INVESTMENT     GAIN (LOSS) ON FROM INVESTMENT INVESTMENT INVESTMENT    REALIZED CAPITAL
                         OF PERIOD       INCOME (LOSS)  INVESTMENTS    OPERATIONS      INCOME     INCOME        GAINS
                         --------------- -------------  -------------- --------------- ---------- ------------- ----------------
<S>                      <C>             <C>            <C>            <C>             <C>        <C>           <C>
PRECIOUS METALS FUND
 (III)
 Class A
 06/30/98                   $   8.83        $ 0.04 (a)      $(3.54)(a)    $  (3.50)     $  0.00     $   0.00        $   0.00
 10/01/96-
  06/30/97                     12.12          0.17           (3.29)          (3.12)        0.00         0.00            0.00
 9/30/96                       12.33          0.03           (0.24)          (0.21)        0.00         0.00            0.00
 9/30/95                       14.14          0.07           (1.88)          (1.81)        0.00         0.00            0.00
 9/30/94                       10.32          0.08            3.74            3.82         0.00         0.00            0.00
 9/30/93                        7.54          0.06            2.72            2.78         0.00         0.00            0.00
 9/30/92                        7.51         (0.01)           0.04            0.03         0.00         0.00            0.00
 2/1/91-
  9/30/91                       7.19         (0.07)           0.39            0.32         0.00         0.00            0.00
 Class B
 06/30/98                       8.42         (0.01)(a)       (3.40)(a)       (3.41)        0.00         0.00            0.00
 10/01/96-
  06/30/97                     11.62          0.00           (3.03)          (3.03)        0.00         0.00            0.00
 9/30/96                       11.90         (0.03)          (0.25)          (0.28)        0.00         0.00            0.00
 6/15/95-
  9/30/95                      11.61         (0.01)           0.30            0.29         0.00         0.00            0.00
 Class C
 06/30/98                       8.43          0.00 (a)       (3.43)(a)       (3.43)        0.00         0.00            0.00
 10/01/96-
  06/30/97                     11.62         (0.03)          (2.99)          (3.02)        0.00         0.00            0.00
 9/30/96                       11.90         (0.07)          (0.21)          (0.28)        0.00         0.00            0.00
 9/30/95                       13.75         (0.02)          (1.83)          (1.85)        0.00         0.00            0.00
 9/30/94                       10.11         (0.02)           3.66            3.64         0.00         0.00            0.00
 9/30/93                        7.44         (0.02)           2.69            2.67         0.00         0.00            0.00
 9/30/92                        7.46         (0.06)           0.04           (0.02)        0.00         0.00            0.00
 9/30/91                        9.40         (0.05)          (1.89)          (1.94)        0.00         0.00            0.00
 9/30/90                        9.86         (0.05)          (0.41)          (0.46)        0.00         0.00            0.00
 10/10/88-
  9/30/89                      10.00         (0.05)          (0.08)          (0.13)       (0.01)        0.00            0.00
<CAPTION>
Selected Per Share Data  DISTRIBUTIONS
for the Period Ended:    IN EXCESS OF
                         NET REALIZED
                         CAPITAL GAINS
                         -------------
<S>                      <C>
PRECIOUS METALS FUND
 (III)
 Class A
 06/30/98                  $   0.00
 10/01/96-
  06/30/97                    (0.17)
 9/30/96                       0.00
 9/30/95                       0.00
 9/30/94                       0.00
 9/30/93                       0.00
 9/30/92                       0.00
 2/1/91-
  9/30/91                      0.00
 Class B
 06/30/98                      0.00
 10/01/96-
  06/30/97                    (0.17)
 9/30/96                       0.00
 6/15/95-
  9/30/95                      0.00
 Class C
 06/30/98                      0.00
 10/01/96-
  06/30/97                    (0.17)
 9/30/96                       0.00
 9/30/95                       0.00
 9/30/94                       0.00
 9/30/93                       0.00
 9/30/92                       0.00
 9/30/91                       0.00
 9/30/90                       0.00
 10/10/88-
  9/30/89                      0.00
</TABLE>
*Annualized
 (a) Per share amounts based upon average number of shares outstanding during
     the period.
 (b) Ratio of expenses to average net assets excluding overdraft expense is
     1.26%.
 (c) Ratio of expenses to average net assets excluding overdraft expense is
     2.06%.
 (d) Ratio of expenses to average net assets excluding overdraft expense is
     2.06%.
 (iii) The information provided for the Precious Metals Fund reflects results
       of operations under the Fund's former investment objective and policies
       through November 14, 1994; such results would not necessarily have been
       achieved had the Fund's current objective and policies then been in
       effect.



16   PIMCO Funds: Multi-Manager Series
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                                RATIO OF NET
                                                                                  RATIO OF      INVESTMENT
DISTRIBUTIONS  TAX BASIS               NET ASSET                                  EXPENSES TO   INCOME TO
FROM           RETURN OF TOTAL         VALUE END OF              NET ASSETS END   AVERAGE NET   AVERAGE NET  PORTFOLIO
EQUALIZATION   CAPITAL   DISTRIBUTIONS PERIOD       TOTAL RETURN OF PERIOD (000S) ASSETS        ASSETS       TURNOVER RATE
- -------------  --------- ------------- ------------ ------------ ---------------- -----------   ------------ -------------
<S>            <C>       <C>           <C>          <C>          <C>              <C>           <C>          <C>
 
  $   0.00     $   0.00    $   0.00      $   5.33      (39.64)%      $  4,709         1.31%(b)       0.70%           56%
      0.00         0.00       (0.17)         8.83      (26.05)          4,016         1.37*          0.33*           46
      0.00         0.00        0.00         12.12       (1.70)          6,245         1.32           0.19            35
      0.00         0.00        0.00         12.33      (12.80)          7,670         1.40           0.60             9
      0.00         0.00        0.00         14.14       37.00          11,229         1.30           0.60            11
      0.00         0.00        0.00         10.32       36.90           3,425         1.40           0.60            10
      0.00         0.00        0.00          7.54        0.40             668         1.90          (0.10)           30
      0.00         0.00        0.00          7.51        6.80             514         2.10*         (1.40)*          19
 
      0.00         0.00        0.00          5.01      (40.50)          3,889         2.11(c)       (0.07)           56
      0.00         0.00       (0.17)         8.42      (26.40)          4,248         2.13*         (0.33)*          46
      0.00         0.00        0.00         11.62       (2.35)          2,218         2.07          (0.56)           35
      0.00         0.00        0.00         11.90        2.50             251         2.20*         (0.20)*           9
      0.00         0.00        0.00          5.00      (40.69)         16,943         2.11(d)       (0.07)           56
      0.00         0.00       (0.17)         8.43      (26.31)         25,113         2.15*         (0.41)*          46
      0.00         0.00        0.00         11.62       (2.35)         37,609         2.07          (0.56)           35
      0.00         0.00        0.00         11.90      (13.50)         42,341         2.20          (0.20)            9
      0.00         0.00        0.00         13.75       36.00          62,825         2.10          (0.20)           11
      0.00         0.00        0.00         10.11       35.90          23,884         2.20          (0.20)           10
      0.00         0.00        0.00          7.44       (0.30)          6,633         2.60          (0.80)           30
      0.00         0.00        0.00          7.46      (20.60)          6,995         2.40          (0.80)           19
      0.00         0.00        0.00          9.40       (4.70)          9,918         2.40          (0.80)           23
      0.00         0.00       (0.01)         9.86       (1.30)          6,630         2.50          (0.60)            9
 
</TABLE>



                                                November 1, 1998 Prospectus   17
<PAGE>
 
            Investment Objectives and Policies

            The investment objective and general investment policies of each
            Fund are described below. There can be no assurance that the in-
            vestment objective of any Fund will be achieved. Because the mar-
            ket value of each Fund's investments will change, the net asset
            value per share of each Fund will also vary. Specific portfolio
            securities eligible for purchase by the Funds, investment tech-
            niques that may be used by the Funds, and the risks associated
            with these securities and techniques are described more fully un-
            der "Characteristics and Risks of Securities and Investment Tech-
            niques" in this Prospectus and "Investment Objectives and Poli-
            cies" in the Statement of Additional Information. For information
            on other investment policies of the Equity Income, Value, Renais-
            sance, Tax-Efficient Equity, Capital Appreciation, Growth, Value
            25, Mid-Cap Growth, Target, Small-Cap Value, Opportunity, Interna-
            tional, Innovation and Precious Metals Funds (together, the "Stock
            Funds"), see "Investment Objectives and Policies--Stock Funds" be-
            low. This information is also relevant to an investment in the
            Balanced Fund because the Common Stock Segment (as described be-
            low) of that Fund is managed in accordance with the investment
            policies of the Value and Capital Appreciation Funds. For informa-
            tion regarding the average portfolio duration of the Fixed Income
            Securities Segment (as described below) of the Balanced Fund, see
            "Balanced Fund--Duration" below.
 
 
FUND        BALANCED FUND seeks total return consistent with prudent invest-
DESCRIPTIONSment management. The Fund attempts to achieve this objective
            through a management policy of investing in the following asset
            classes: common stock, fixed income securities, and money market
            instruments. The proportion of the Fund's total assets allocated
            among common stocks, fixed income securities, and money market in-
            struments will vary from time to time and will be determined by
            the Adviser. In determining the allocation of the Fund's assets
            among the three asset classes, the Adviser will employ asset allo-
            cation principles which take into account certain economic fac-
            tors, market conditions, and the expected relative total return
            and risk of the various asset classes. Under normal circumstances,
            it is anticipated that the Fund will generally maintain a balance
            among the types of securities in which it invests. Thus, the Fund
            will normally maintain 40% to 65% of its assets in common stock,
            at least 25% of its assets in fixed income securities, and less
            than 10% of its assets in money market instruments. However, in no
            event would the Fund invest in any common stock if, at the time of
            investment, more than 80% of the Fund's assets would be invested
            in common stock; in no event would the Fund invest in a fixed in-
            come security (other than a short-term instrument) if, at the time
            of investment, more than 80% of the Fund's assets would be in-
            vested in fixed income securities; nor would the Fund invest in a
            money market instrument if, at the time of investment, more than
            60% of its assets would be invested in money market instruments.
               In managing the Fund, the Adviser uses a specialist approach
            and has engaged three of the Trust's Portfolio Managers to manage
            certain portions of the Fund's assets. The portion of the assets
            of the Fund allocated by the Adviser for investment in common
            stock (the "Common Stock Segment") will be further allocated by
            the Adviser for investment by NFJ and Cadence. The portion of the
            Common Stock Segment allocated to NFJ will be managed in accor-
            dance with the investment policies of the Value Fund; the portion
            allocated to Cadence will be managed in accordance with the in-
            vestment policies of the Capital Appreciation Fund. Allocations of
            the Common Stock Segment to NFJ and Cadence will vary from time to
            time as determined by the Adviser.
               The portion of the assets of the Fund allocated by the Adviser
            for investment in fixed income securities (the "Fixed Income Secu-
            rities Segment") will be managed by Pacific Investment Management.
            The Fund may invest the Fixed Income Securities Segment in the
            following types of securities: securities issued or guaranteed by
            the U.S. Government, its agencies or instrumentalities; corporate
            debt securities, including convertible securities and corporate
            commercial paper; mortgage-related and other asset-backed securi-
            ties; inflation-indexed bonds issued by both governments and cor-
            porations; structured notes, including hybrid or "indexed" securi-
            ties, catastrophe bonds and loan participations; delayed funding
            loans and revolving credit facilities; bank certificates of depos-
            it, fixed time deposits and bankers' acceptances; repurchase
            agreements and reverse repurchase agreements; obligations of for-
            eign governments or their subdivisions, agencies and instrumental-
            ities; and obligations of international agencies or supranational
            entities. Fixed income securities may have fixed, variable, or
            floating rates of interest.



18   PIMCO Funds: Multi-Manager Series

<PAGE>
 
               The Fund invests the Fixed Income Securities Segment in fixed
            income securities of varying maturities. Portfolio holdings will
            be concentrated in areas of the bond market (based on quality,
            sector, coupon or maturity) that Pacific Investment Management be-
            lieves to be relatively undervalued. Fixed income securities in
            which the Fund may invest will, at the time of investment, be
            rated Baa or better by Moody's Investors Service, Inc.
            ("Moody's"), BBB or better by Standard & Poor's Ratings Services
            ("S&P") or, if not rated by Moody's or S&P, will be of comparable
            quality as determined by Pacific Investment Management, except
            that up to 10% of the Fixed Income Securities Segment may be in-
            vested in lower rated securities that are rated B or higher by
            Moody's or S&P or, if not rated by Moody's or S&P, determined by
            Pacific Investment Management to be of comparable quality. High
            yield fixed income securities rated lower than Baa by Moody's or
            BBB by S&P, or of equivalent quality, are not considered to be in-
            vestment grade, and are commonly referred to as "junk bonds." Se-
            curities rated below investment grade and comparable unrated secu-
            rities are subject to greater risks than higher quality fixed in-
            come securities. See "Characteristics and Risks of Securities and
            Investment Techniques--Risks of High Yield Securities ("Junk
            Bonds")." The Fund also may invest up to 20% of the Fixed Income
            Securities Segment in securities denominated in foreign curren-
            cies, and may invest beyond this limit in U.S. dollar-denominated
            securities of foreign issuers. Investing in securities denominated
            in foreign currencies and securities of foreign issuers involves
            special risks and considerations not typically associated with in-
            vesting in U.S. securities. For a discussion of such risks, see
            "Characteristics and Risks of Securities and Investment Tech-
            niques--Foreign Securities."
               Each Portfolio Manager generally invests a portion of its allo-
            cation in liquid securities to facilitate redemptions. In addi-
            tion, PIMCO Advisors reserves the right to allocate a portion of
            the Fund's assets (the "Money Market Segment") for investment in
            money market instruments and reserves the right to manage the in-
            vestment of such assets. Because of the Fund's flexible investment
            policy, portfolio turnover may be greater than for a fund that
            does not allocate assets among various types of securities. See
            "Characteristics and Risks of Securities and Investment Tech-
            niques--Portfolio Turnover."
               The Fund may engage in the purchase and writing of put and call
            options on debt securities and securities indexes and may also
            purchase or sell interest rate futures contracts, stock index
            futures contracts, and options thereon. The Fund also may enter
            into swap agreements with respect to foreign currencies, interest
            rates, and securities indexes. With respect to securities of the
            Fixed Income Securities Segment denominated in foreign currencies,
            the Fund may engage in foreign currency exchange transactions by
            means of buying or selling foreign currencies on a spot basis, en-
            tering into forward foreign currency contracts, and buying and
            selling foreign currency options, foreign currency futures, and
            options on foreign currency futures. Foreign currency exchange
            transactions may be entered into for the purpose of hedging
            against foreign currency exchange risk arising from the Fund's in-
            vestment or anticipated investment in securities denominated in
            foreign currencies and for purposes of increasing exposure to a
            particular foreign currency or to shift exposure to foreign cur-
            rency fluctuations from one country to another.
               Duration. Under normal circumstances, the average portfolio du-
            ration of the Fixed Income Securities Segment of the Balanced Fund
            will vary within a three- to six-year time frame based on the
            Portfolio Manager's forecast for interest rates. Duration is a
            measure of the expected life of a fixed income security that was
            developed as a more precise alternative to the concept of "term to
            maturity." Traditionally, a fixed income security's "term to matu-
            rity" has been used as proxy for the sensitivity of the security's
            price to changes in interest rates (which is the "interest rate
            risk" or "volatility" of the security). However, "term to maturi-
            ty" measures only the time until a fixed income security provides
            its final payment, taking no account of the pattern of the
            security's payments prior to maturity. In contrast, duration in-
            corporates a bond's yield, coupon interest payments, final matu-
            rity and call features into one measure of the average life of a
            fixed income security on a present value basis. Duration manage-
            ment is one of the fundamental tools used by the Portfolio Manager
            for the Fixed Income Securities Segment of the Balanced Fund. For
            more information on investments in fixed income securities, see
            "Characteristics and Risks of Securities and Investment Tech-
            niques" in this Prospectus and "Investment Objectives and Poli-
            cies" in the Statement of Additional Information.



                                                November 1, 1998 Prospectus   19
<PAGE>
 

 
            EQUITY INCOME FUND seeks current income as a primary investment
            objective, and long-term growth of capital as a secondary objec-
            tive. The Fund invests primarily in common stocks characterized by
            having below-average price to earnings ("P/E") ratios and higher
            dividend yields relative to their industry groups. In selecting
            securities, the Portfolio Manager classifies a universe of approx-
            imately 2,000 stocks by industry, each of which has a minimum mar-
            ket capitalization of $200 million at the time of investment. The
            universe is then screened to find the lowest P/E ratios in each
            industry, subject to application of quality and price momentum
            screens. From this group, approximately 25 stocks with the highest
            yields are chosen for the Fund. The universe is then rescreened to
            find the highest yielding stock in each industry, subject to ap-
            plication of quality and price momentum screens. From this group,
            approximately 25 stocks with the lowest P/E ratios are added to
            the Fund. Although quarterly rebalancing is a general rule, re-
            placements are made whenever an alternative stock within the same
            industry has a significantly lower P/E ratio or higher dividend
            yield than the current Fund holding. The Portfolio Manager for the
            Equity Income Fund is NFJ.
 
            VALUE FUND seeks long-term growth of capital and income. The Fund
            invests primarily in common stocks characterized by having below-
            average P/E ratios relative to their industry groups. In selecting
            securities, the Portfolio Manager classifies a universe of approx-
            imately 2,000 stocks by industry, each of which has a minimum mar-
            ket capitalization of $200 million at the time of investment. The
            universe is then screened to find the stocks with the lowest P/E
            ratios in each industry, subject to application of quality and
            price momentum screens. The stocks in each industry with the low-
            est P/E ratios that pass the quality and price momentum screens
            are then selected for the Fund. The Fund usually invests in ap-
            proximately 50 stocks. Although quarterly rebalancing is a general
            rule, replacements are made whenever an alternative stock within
            the same industry has a significantly lower P/E ratio than the
            current Fund holdings. The Portfolio Manager for the Value Fund
            is NFJ.
 
            RENAISSANCE FUND seeks long-term growth of capital and income. The
            Fund invests primarily in common stocks having below-average valu-
            ations whose issuers are experiencing improvements in their busi-
            ness fundamentals. Relative valuation is determined using a multi-
            factor approach that examines characteristics such as price to
            book, price to earnings and price to cash flow ratios. Stocks
            which pass the valuation screen are further analyzed to identify
            the key drivers of financial results and catalysts for change
            which indicate that a company may demonstrate improving fundamen-
            tals in the future. Stocks which appear likely to exceed consensus
            expectations are candidates for addition to the Fund's portfolio.
            Stocks are sold from the Fund's portfolio when the Portfolio Man-
            ager believes that their ability to exceed investor expectations
            has diminished or when their valuations have become excessive.
               The Fund may invest a portion of its assets in securities of
            foreign issuers traded in foreign securities markets (not includ-
            ing Eurodollar certificates of deposit), which will not exceed 15%
            of the Fund's assets at the time of investment. Investing in the
            securities of foreign issuers involves special risks and consider-
            ations not typically associated with investing in U.S. securities.
            For a discussion of such risks, see "Characteristics and Risks of
            Securities and Investment Techniques--Foreign Securities." The
            Fund may also purchase and write call and put options on securi-
            ties and securities indexes; enter into futures contracts and use
            options on futures contracts; buy or sell foreign currencies; and
            enter into forward foreign currency contracts. The Portfolio Man-
            ager for the Renaissance Fund is Columbus Circle.
 
            TAX-EFFICIENT EQUITY FUND seeks maximum after-tax growth of capi-
            tal. The Fund attempts to provide a total return which exceeds the
            return of the Standard & Poor's 500 Composite Stock Price Index
            (the "S&P 500"). In addition, the Fund seeks to achieve superior
            after-tax returns for its shareholders in part by minimizing the
            taxes they incur in connection with the Fund's investment income
            and realized capital gains by using the strategies described be-
            low. Notwithstanding these strategies, the Fund may have taxable
            investment income and may realize taxable gains from time to time.
               The Fund invests primarily in a broadly diversified portfolio
            of at least 200 common stocks of companies with larger market cap-
            italizations. In selecting specific securities, the Portfolio Man-
            ager uses a proprietary quantitative



20   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            model that ranks companies based on long-term (5-10 years) price
            appreciation potential through analysis of such factors as growth
            of sustainable earnings and dividend behavior. Securities in the
            top 50% of the model's ranking are considered for purchase. The
            Portfolio Manager's sell discipline incorporates a focus on reduc-
            ing the realization of capital gains. Each sell candidate is eval-
            uated based on its cost, current market value, and anticipated
            benefit of replacement. Securities in the bottom 20% of the mod-
            el's ranking are considered for sale. The Fund may engage in the
            purchase and writing of options on securities indexes and may also
            invest in stock index futures contracts and options thereon.
               The Portfolio Manager utilizes a range of active tax management
            techniques to minimize taxable distributions, including: low port-
            folio turnover; emphasis towards low-dividend, growth-oriented
            companies; tax lot accounting (identification of specific shares
            of securities being sold that have the lowest tax cost); and regu-
            lar rebalancing to capture available tax credits. The Fund will
            generally seek to avoid realizing net short-term capital gains
            and, when realizing gains, will attempt to realize long-term gains
            (i.e., gains on securities held for more than 12 months). The Fund
            intends to notify each shareholder as to that portion of his or
            her capital gain dividends which qualifies for a long-term tax
            rate of 20% in the hands of the shareholder. Net short-term capi-
            tal gains, when distributed, will be taxed as ordinary income, at
            graduated rates of up to 39.6%. When the Fund decides to sell a
            particular appreciated security, it will normally select for sale
            first those share lots with holding periods exceeding 12 months
            and among those, the share lots with the highest cost basis. The
            Fund may, when prudent, sell securities to realize capital losses
            that can be used to offset realized capital gains.
               To protect against price declines in securities holdings with
            large accumulated capital gains, the Fund may, to the extent per-
            mitted by law, use hedging techniques such as the purchase of put
            options, the sale of stock index futures contracts and equity
            swaps. By using these techniques rather than selling such securi-
            ties, the Fund can reduce its exposure to price declines in the
            securities without realizing substantial capital gains. In limited
            circumstances, the Fund may follow the practice of distributing
            selected appreciated securities to meet redemptions of certain in-
            vestors and may, within certain limits, use the selection of secu-
            rities distributed to meet such redemptions as a management tool.
            By distributing appreciated securities the Fund can reduce its po-
            sition in such securities without realizing capital gains. During
            periods of net withdrawals by investors, using distributions of
            securities could enable the Fund to avoid the forced sale of secu-
            rities to raise cash for meeting redemptions.
               It is expected that by employing the various tax-efficient man-
            agement strategies described above, the Fund can minimize the ex-
            tent to which shareholders incur taxes as a result of realized
            capital gains. The Fund may nevertheless realize gains and share-
            holders will incur tax liability from time to time. The Portfolio
            Manager for the Tax-Efficient Equity Fund is Parametric.
 
            CAPITAL APPRECIATION FUND seeks growth of capital. The Fund in-
            vests primarily in common stocks of companies that have improving
            fundamentals (such as growth of earnings and dividends) and whose
            stock is reasonably valued by the market. Stocks for the Fund are
            selected from a universe of the approximately 1,000 largest market
            capitalization stocks, all of which are those of companies with
            market capitalizations of at least $1 billion at the time of in-
            vestment. The Fund usually invests in approximately 60 to 100 com-
            mon stocks. Each issue is screened and ranked using five distinct
            computerized models, including: (i) a dividend growth screen, (ii)
            an equity growth screen, (iii) an earnings growth screen, (iv) an
            earnings momentum screen, and (v) an earnings surprise screen. The
            Portfolio Manager believes that the models identify the stocks in
            the universe exhibiting growth characteristics with reasonable
            valuations. Stocks are replaced when they score worse-than-median
            screen ranks, have negative earnings surprises, or show poor rela-
            tive price performance. The universe is rescreened frequently to
            obtain a favorable composition of growth and value characteristics
            for the entire Fund. The Portfolio Manager for the Capital Appre-
            ciation Fund is Cadence.
 
            GROWTH FUND seeks long-term growth of capital. Income is an inci-
            dental consideration. The Fund invests primarily in common stocks
            of companies with medium to large market capitalizations. The Fund
            may invest a portion of its



                                               November 1, 1998 Prospectus   21
<PAGE>
 
            assets in securities of foreign issuers traded in foreign securi-
            ties markets (not including Eurodollar certificates of deposit),
            which will not exceed 15% of the Fund's assets at the time of in-
            vestment. Investing in the securities of foreign issuers involves
            special risks and considerations not typically associated with in-
            vesting in U.S. companies. For a discussion of such risks, see
            "Characteristics and Risks of Securities and Investment Tech-
            niques--Foreign Securities." The Fund may also purchase and write
            call and put options on securities and securities indexes; enter
            into futures contracts and use options on futures contracts; buy
            or sell foreign currencies; and enter into forward foreign cur-
            rency contracts. The Portfolio Manager for the Growth Fund is Co-
            lumbus Circle.
 
            VALUE 25 FUND seeks long-term growth of capital and income. The
            Fund invests primarily in a portfolio of approximately 25 common
            stocks of companies with medium market capitalizations and below-
            average P/E ratios relative to their industry groups. In selecting
            securities, the Portfolio Manager classifies a universe of more
            than 2,000 stocks by industry, each of which has a minimum market
            capitalization of $200 million. The universe is then screened to
            find stocks with the lowest P/E ratios in each industry, subject
            to application of quality, earnings momentum and price momentum
            screens. Those stocks which pass the screenings and satisfy the
            medium-cap size criteria are further analyzed. Fundamental re-
            search is performed on the companies determined by such process to
            be the most undervalued. Approximately 25 stocks, diversified
            across industries, are selected on an equal-weighted basis for the
            Fund's portfolio. Although quarterly rebalancing is a general
            rule, replacements are made whenever an alternative stock has a
            significantly lower P/E ratio than the current Fund holdings. Be-
            cause the Fund concentrates on approximately 25 stocks at any one
            time (and is not as diversified as many stock funds), it is in-
            tended for aggressive investors seeking above-average capital
            gains and willing to accept the greater risks associated there-
            with. The Portfolio Manager for the Value 25 Fund is NFJ.
 
            MID-CAP GROWTH FUND seeks growth of capital. The Fund invests pri-
            marily in common stocks of middle capitalization companies that
            have improving fundamentals (such as growth of earnings and divi-
            dends) and whose stock is reasonably valued by the market. Stocks
            for the Fund are selected from a universe of companies with market
            capitalizations in excess of $500 million at the time of invest-
            ment, excluding the 200 companies with the highest market capital-
            ization. The Fund usually invests in approximately 60 to 100 com-
            mon stocks. Each issue is screened and ranked using five distinct
            computerized models, including: (i) a dividend growth screen, (ii)
            an equity growth screen, (iii) an earnings growth screen, (iv) an
            earnings momentum screen, and (v) an earnings surprise screen. The
            Portfolio Manager believes that the models identify the stocks in
            the universe exhibiting growth characteristics with reasonable
            valuations. Stocks are replaced when they score worse-than-median
            screen ranks, have negative earnings surprises, or show poor rela-
            tive price performance. The universe is rescreened frequently to
            obtain a favorable composition of growth and value characteristics
            for the entire Fund. The Portfolio Manager for the Mid-Cap Growth
            Fund is Cadence.
 
            TARGET FUND seeks capital appreciation. No consideration is given
            to income. The Fund invests primarily in common stocks of compa-
            nies with medium market capitalizations. The Fund may invest a
            portion of its assets in securities of foreign issuers traded in
            foreign securities markets (not including Eurodollar certificates
            of deposit), which will not exceed 15% of the Fund's assets at the
            time of investment. Investing in the securities of foreign issuers
            involves special risks and considerations not typically associated
            with investing in U.S. companies. For a discussion of such risks,
            see "Characteristics and Risks of Securities and Investment Tech-
            niques--Foreign Securities." The Fund may also purchase and write
            call and put options on securities and securities indexes; enter
            into futures contracts and use options on futures contracts; buy
            or sell foreign currencies; and enter into forward foreign cur-
            rency contracts. The Portfolio Manager for the Target Fund is Co-
            lumbus Circle.
 
            SMALL-CAP VALUE FUND seeks long-term growth of capital and income.
            The Fund invests primarily in common stocks of companies with mar-
            ket capitalizations between $50 million and $1 billion at the time
            of investment. In selecting



22   PIMCO Funds: Multi-Manager Series

<PAGE>
 
            securities, the Portfolio Manager divides a universe of up to ap-
            proximately 2,000 stocks into quartiles based upon P/E ratio. The
            lowest quartile in P/E ratio is screened for market capitaliza-
            tions between $50 million and $1 billion, subject to application
            of quality and price momentum screens. Approximately 100 stocks
            with the lowest P/E ratios are combined in the Fund, subject to
            limits on the weighting for any one industry. Although quarterly
            rebalancing is a general rule, replacements are made whenever a
            holding achieves a higher P/E ratio than the S&P 500's P/E ratio
            or its industry average P/E ratio, or when an alternative stock
            within the same industry has a significantly lower P/E ratio than
            the current Fund holding. The Fund is intended for aggressive in-
            vestors seeking above-average gains and willing to accept the
            greater risks associated therewith. The Portfolio Manager for the
            Small-Cap Value Fund is NFJ.
 
            OPPORTUNITY FUND seeks capital appreciation. No consideration is
            given to income. Except to the extent described under "How to Buy
            Shares--Restrictions on Sales of and Exchanges for Shares of the
            Opportunity Fund," the Fund is closed to new investors. The Fund
            invests primarily in common stocks of companies with market capi-
            talizations of less than $2 billion at the time of investment. The
            Fund is intended for aggressive investors seeking above-average
            gains and willing to accept the greater risks associated there-
            with.
               The Fund may invest a portion of its assets in securities of
            foreign issuers traded in foreign securities markets (not includ-
            ing Eurodollar certificates of deposit), which will not exceed 15%
            of the Fund's assets at the time of investment. Investing in the
            securities of foreign issuers involves special risks and consider-
            ations not typically associated with investing in U.S. companies.
            For a discussion of such risks, see "Characteristics and Risks of
            Securities and Investment Techniques--Foreign Securities." The
            Fund may also purchase and write call and put options on securi-
            ties and securities indexes; enter into futures contracts and use
            options on futures contracts; buy or sell foreign currencies; and
            enter into forward foreign currency contracts. The Portfolio Man-
            ager for the Opportunity Fund is Columbus Circle.
 
            INTERNATIONAL FUND seeks capital appreciation through investments
            in an international portfolio. Income is an incidental considera-
            tion. Under normal market conditions, at least 65% of the Fund's
            total assets will be invested in common stocks, which may or may
            not pay dividends, as well as convertible bonds, convertible pre-
            ferred stocks, warrants, rights or other equity securities, for a
            combination of capital appreciation and income. Convertible secu-
            rities may include securities convertible only by certain classes
            of investors (which may not include the Fund). The Fund may not
            invest in convertible securities which are of less than investment
            grade quality at the time of purchase.
               The Fund will normally invest in securities traded in developed
            foreign securities markets. Particular consideration is given to
            investments principally traded in developed North American (other
            than United States), Japanese, European, Pacific and Australian
            securities markets, and in securities of foreign issuers traded on
            U.S. securities markets. The Fund will also invest in emerging
            markets, where markets may not yet fully reflect the potential of
            the developing economy. There are no prescribed limits on geo-
            graphic asset distribution and the Fund has the authority to in-
            vest in securities traded in securities markets of any country in
            the world. In allocating the Fund's assets among the various secu-
            rities markets of any country of the world, the Portfolio Manager
            will consider such factors as the condition and growth potential
            of the various economies and securities markets, currency and tax-
            ation considerations and other pertinent financial, social, na-
            tional and political factors. Under certain adverse investment
            conditions, the Fund may restrict the number of securities markets
            in which its assets will be invested, although under normal market
            circumstances the Fund's investments will include securities prin-
            cipally traded in at least three different countries. The Fund
            will not limit its investments to any particular type or size of
            company.
               The Fund may invest up to 10% of its assets in securities of
            other investment companies, such as closed-end management invest-
            ment companies which invest in foreign markets. The Fund may also
            purchase and write call and put options on securities, securities
            indexes, and on foreign currencies; enter into futures contracts
            and use options on futures contracts, including futures contracts
            on foreign currencies; buy or sell foreign currencies; and enter
            into forward foreign currency contracts. The Fund may utilize
            stock index futures contracts and options thereon for hedging pur-
            poses and also for investment purposes. For instance, the Fund may
            invest in stock index futures contracts and
 

                                               November 1, 1998 Prospectus   23
<PAGE>
 
            related options as an alternative to purchasing individual stocks
            to adjust its exposure to a particular foreign market. See "Char-
            acteristics and Risks of Securities and Investment Techniques--De-
            rivative Instruments--Index Futures."
               The Fund will not normally invest in securities of U.S. issuers
            traded on U.S. securities markets. However, when the Portfolio
            Manager believes that conditions in international securities mar-
            kets warrant a defensive investment strategy, the Fund may invest
            up to 100% of its assets in domestic debt, foreign debt and equity
            securities principally traded in the U.S., including money market
            instruments, obligations issued or guaranteed by the U.S. or a
            foreign government or their respective agencies, authorities or
            instrumentalities, or corporate bonds and sponsored American De-
            pository Receipts.
               Investing in the securities of foreign issuers, and particu-
            larly emerging market issuers, involves special risks and consid-
            erations not typically associated with investing in U.S. compa-
            nies. For a discussion of such risks, see "Characteristics and
            Risks of Securities and Investment Techniques--Foreign Securi-
            ties." Currently, the Portfolio Manager for the International Fund
            is Blairlogie. On or before March 31, 1999, it is anticipated that
            PIMCO Advisors will sell substantially all of its ownership inter-
            est in Blairlogie and assume full portfolio management responsi-
            bility for the International Fund. See "Management of the Trust--
            Portfolio Managers--Blairlogie."
 
            INNOVATION FUND seeks capital appreciation. No consideration is
            given to income. The Fund invests primarily (i.e., at least 65% of
            its assets) in common stocks of companies which utilize innovative
            technologies to gain a strategic competitive advantage in their
            industry as well as companies that provide and service those tech-
            nologies. Securities will be selected with minimal emphasis on
            more traditional factors such as growth potential or value rela-
            tive to intrinsic worth. Instead, the Fund will be guided by the
            theory of Positive Momentum & Positive Surprise (see "Management
            of the Trust--Portfolio Managers--Columbus Circle"), with special
            emphasis on common stocks of companies whose perceived strength
            lies in their use of innovative technologies in new products, en-
            hanced distribution systems and improved management techniques.
            Although the Fund emphasizes the utilization of technologies, it
            is not restricted to investment in companies in a particular busi-
            ness sector or industry.
               The Fund may invest a portion of its assets in securities of
            foreign issuers traded in foreign securities markets (not includ-
            ing Eurodollar certificates of deposit), which will not exceed 15%
            of the Fund's assets at the time of investment. Investing in the
            securities of foreign issuers involves special risks and consider-
            ations not typically associated with investing in U.S. companies.
            For a discussion of such risks, see "Characteristics and Risks of
            Securities and Investment Techniques--Foreign Securities." The
            Fund may also purchase and write call and put options on securi-
            ties and securities indexes; enter into futures contracts and use
            options on futures contracts; buy or sell foreign currencies; and
            enter into forward foreign currency contracts. The Portfolio Man-
            ager for the Innovation Fund is Columbus Circle.
 
            PRECIOUS METALS FUND seeks capital appreciation. No consideration
            is given to income. The Fund concentrates investments in a global
            portfolio of common stocks of companies principally engaged in
            precious metals-related activities, which include companies prin-
            cipally engaged in the extraction, processing, distribution or
            marketing of precious metals (the "precious metals industry"). A
            particular company is deemed to be "principally engaged" in the
            precious metals industry if at the time of investment the Portfo-
            lio Manager considers that at least 50% of the company's assets,
            revenues or profits are derived from the precious metals industry.
            Normally, at least 65% of the assets of the Fund will be invested
            in the precious metals industry and in securities the value of
            which is linked to the price of a precious metal. See "Character-
            istics and Risks of Securities and Investment Techniques--Precious
            Metals."
               The Fund will seek to identify securities of companies which,
            based upon the Portfolio Manager's evaluation of their fundamental
            investment characteristics, are undervalued in comparison to the
            present or anticipated value of the precious metals relevant to
            them. Examples of precious metals include gold, silver and plati-
            num. To the extent permitted by federal tax law, the Fund may in-
            vest directly in gold bullion and other precious metals. Although
            the Fund reserves the right to do so at any time, as of the date
            of this Prospectus, it does not have the present intention to in-
            vest directly in any precious metals other than gold.
 

24   PIMCO Funds: Multi-Manager Series
<PAGE>
 

               Although the Fund reserves the right to do so at any time, as
            of the date of this Prospectus, it does not have the present in-
            tention to invest more than 10% of its assets in either precious
            metals, such as gold bullion, or in futures on precious metals,
            such as gold futures, and options thereon, or to invest more than
            5% of its assets in securities the value of which is linked to the
            price of a single precious metal. The Fund may invest up to 100%
            of its assets in securities of companies whose assets, revenues or
            profits are derived from a single precious metal.
               The Fund may invest up to 100% of its assets in securities
            principally traded on foreign securities markets and in securities
            of foreign issuers that are traded on U.S. securities markets or
            on foreign securities markets. Investing in the securities of for-
            eign issuers involves special risks and considerations not typi-
            cally associated with investing in U.S. companies. For a discus-
            sion of such risks, see "Characteristics and Risks of Securities
            and Investment Techniques--Foreign Securities." The Fund may also
            purchase and write call and put options on securities, securities
            indexes, commodity indexes, and on foreign currencies; enter into
            futures contracts and use options on futures contracts, including
            futures contracts on stock indexes, foreign currencies, and pre-
            cious metals; buy or sell foreign currencies; and enter into for-
            ward foreign currency contracts.
               The Fund, because of its emphasis on one industrial sector,
            should be considered as one aspect of a diversified portfolio and
            may not be suitable by itself as a balanced investment program.
            The Portfolio Manager for the Precious Metals Fund is Van Eck.
 
STOCK FUNDS The Equity Income, Value, Tax-Efficient Equity, Capital Apprecia-
            tion, Value 25, Mid-Cap Growth and Small-Cap Value Funds will each
            invest primarily (normally at least 65% of its assets) in common
            stock. Each of these Funds may maintain a portion of its assets,
            which will usually not exceed 10%, in U.S. Government securities,
            high quality debt securities (whose maturity or remaining maturity
            will not exceed five years), money market obligations, and in cash
            to provide for payment of the Fund's expenses and to meet redemp-
            tion requests. It is the policy of these Funds to be as fully in-
            vested in common stocks as practicable at all times. This policy
            precludes these Funds from investing in debt securities as a de-
            fensive investment posture (although these Funds may invest in
            such securities to provide for payment of expenses and to meet re-
            demption requests). Accordingly, investors in these Funds bear the
            risk of general declines in stock prices and the risk that a
            Fund's exposure to such declines cannot be lessened by investment
            in debt securities. These Funds may also invest in convertible se-
            curities, preferred stocks, and warrants, subject to certain
            limitations.
               The Renaissance, Growth, Target, Opportunity, International,
            Innovation and Precious Metals Funds will each invest primarily
            (normally at least 65% of its assets) in common stocks, and may
            also invest in other equity securities, including preferred stocks
            and securities (including debt securities and warrants) convert-
            ible into or exercisable for common stocks. Each of these Funds
            may invest a portion of its assets in debt securities and, for
            temporary defensive purposes, up to 100% of its assets in short-
            term U.S. Government securities and other money market instru-
            ments.
               One or more of the Stock Funds may temporarily not be invested
            primarily in equity securities immediately following the commence-
            ment of operations or after receipt of significant new monies.
            While attempting to identify suitable investments, the Funds may
            hold assets in cash, short-term U.S. Government securities and
            other money market instruments. Any of the Stock Funds may tempo-
            rarily not contain the number of securities in which the Fund nor-
            mally invests if the Fund does not have sufficient assets to be
            fully invested, or pending the Portfolio Manager's ability to pru-
            dently invest new monies.
               The Stock Funds may also lend portfolio securities; enter into
            repurchase agreements and reverse repurchase agreements (subject
            to the Funds' investment limitations described below); purchase
            and sell securities on a when-issued or delayed delivery basis;
            and enter into forward commitments to purchase securities. Each of
            the Stock Funds may invest in American Depository Receipts
            ("ADRs"). In addition, the Renaissance, Growth, Target, Opportuni-
            ty, International, Innovation and Precious Metals Funds may invest
            in European Depository Receipts ("EDRs") and Global Depository Re-
            ceipts ("GDRs"). The Stock Funds that invest primarily in securi-
            ties of foreign issuers may invest a portion of their assets in
            debt securities and money market obligations issued by U.S. and
            foreign issuers that are either U.S. dollar-denominated or denomi-
            nated in foreign currency. For more information on these and other
            invest-
 

                                               November 1, 1998 Prospectus   25
<PAGE>
 

            ment practices, see "Characteristics and Risks of Securities and
            Investment Techniques" in this Prospectus and "Investment Objec-
            tives and Policies" in the Statement of Additional Information.

            Characteristics and Risks of
            Securities and Investment Techniques
 
            The different types of securities and investment techniques used
            by the individual Funds all have attendant risks of varying de-
            grees. For example, with respect to common stock, there can be no
            assurance of capital appreciation, and there is a risk of market
            decline. With respect to debt securities, including money market
            instruments, there is the risk that the issuer of a security may
            not be able to meet its obligation to make scheduled interest or
            principal payments. Because each Fund seeks a different investment
            objective and has different investment policies, each is subject
            to varying degrees of financial, market and credit risks. There-
            fore, investors should carefully consider the investment objec-
            tive, investment policies and potential risks of any Fund or Funds
            before investing.
               The following describes potential risks associated with differ-
            ent types of investment techniques that may be used by the indi-
            vidual Funds. For more detailed information on these investment
            techniques, as well as information on the types of securities in
            which some or all of the Funds may invest, see the Statement of
            Additional Information.
 
INVESTMENTS Certain of the Funds may invest in common stock of companies with
IN COMPANIESmarket capitalizations that are small compared to other publicly
WITH SMALL  traded companies. Generally, small market capitalization is con-
AND MEDIUM  sidered to be less than $1.5 billion and large market capitaliza-
MARKET      tion is considered to be more than $5 billion. Under normal market
CAPITALI-   conditions, the Small- Cap Value Fund will invest primarily in
ZATIONS     companies with market capitalizations of between $50 million and
            $1 billion, and the Opportunity Fund will invest primarily in com-
            panies with market capitalizations of less than $2 billion. In-
            vestments in larger companies present certain advantages in that
            such companies generally have greater financial resources, more
            extensive research and development, manufacturing, marketing and
            service capabilities, and more stability and greater depth of man-
            agement and technical personnel. Investments in smaller, less sea-
            soned companies may present greater opportunities for growth but
            also may involve greater risks than customarily are associated
            with more established companies. The securities of smaller compa-
            nies may be subject to more abrupt or erratic market movements
            than larger, more established companies. These companies may have
            limited product lines, markets or financial resources, or they may
            be dependent upon a limited management group. Their securities may
            be traded in the over-the-counter market or on a regional ex-
            change, or may otherwise have limited liquidity. As a result of
            owning large positions in this type of security, a Fund is subject
            to the additional risk of possibly having to sell portfolio secu-
            rities at disadvantageous times and prices if redemptions require
            the Fund to liquidate its securities positions. In addition, it
            may be prudent for a Fund with a relatively large asset size to
            limit the number of relatively small positions it holds in securi-
            ties having limited liquidity in order to minimize its exposure to
            such risks, to minimize transaction costs, and to maximize the
            benefits of research. As a consequence, as a Fund's asset size in-
            creases, the Fund may reduce its exposure to illiquid small capi-
            talization securities, which could adversely affect performance.

            Many of the Funds may also invest in stocks of companies with
            medium market capitalizations. Whether a U.S. issuer's market cap-
            italization is medium is determined by reference to the capital-
            ization for all issuers whose equity securities are listed on a
            United States national securities exchange or which are reported
            on NASDAQ. Issuers with market capitalizations within the range of
            capitalization of companies included in the S&P Mid Cap 400 Index
            may be regarded as being issuers with medium market capitaliza-
            tions. Such investments share some of the risk characteristics of
            investments in stocks of companies with small market capitaliza-
            tions described above, although such companies tend to have longer
            operating histories, broader product lines and greater financial
            resources and their stocks tend to be more liquid and less vola-
            tile than those of smaller capitalization issuers. 
 

26   PIMCO Funds: Multi-Manager Series
<PAGE>
 
 
FOREIGN
SECURITIES

            The International Fund may invest directly in foreign equity secu-
            rities; U.S. dollar- or foreign currency-denominated foreign cor-
            porate debt securities; foreign preferred securities; certificates
            of deposit, fixed time deposits and bankers' acceptances issued by
            foreign banks; and obligations of foreign governments or their
            subdivisions, agencies and instrumentalities, international agen-
            cies and supranational entities. The Precious Metals Fund may in-
            vest primarily in securities of foreign issuers, securities denom-
            inated in foreign currencies, securities principally traded on se-
            curities markets outside of the United States and in securities of
            foreign issuers that are traded on U.S. securities markets. The
            Balanced Fund may invest up to 20% of its Fixed Income Securities
            Segment in securities denominated in foreign currencies, and may
            invest beyond this limit in U.S. dollar-denominated securities of
            foreign issuers. The Renaissance, Growth, Target, Opportunity and
            Innovation Funds may invest up to 15% of their respective assets
            in securities which are traded principally in securities markets
            outside the United States (Eurodollar certificates of deposit are
            excluded for purposes of these limitations), and may invest with-
            out limit in securities of foreign issuers that are traded in U.S.
            markets.  

               All of the Funds may invest in ADRs. In addition, the Renais-
            sance, Growth, Target, Opportunity, International, Innovation and
            Precious Metals Funds may invest in EDRs and GDRs. ADRs are dol-
            lar-denominated receipts issued generally by domestic banks and
            representing the deposit with the bank of a security of a foreign
            issuer, and are publicly traded on exchanges or over-the-counter
            in the United States. EDRs are receipts similar to ADRs and are
            issued and traded in Europe. GDRs may be offered privately in the
            United States and also trade in public or private markets in other
            countries. 
               Investing in the securities of issuers in any foreign country
            involves special risks and considerations not typically associated
            with investing in U.S. companies. Shareholders should consider
            carefully the substantial risks involved in investing in securi-
            ties issued by companies and governments of foreign nations. These
            risks include: differences in accounting, auditing and financial
            reporting standards; generally higher commission rates on foreign
            portfolio transactions; the possibility of nationalization, expro-
            priation or confiscatory taxation; adverse changes in investment
            or exchange control regulations (which may include suspension of
            the ability to transfer currency from a country); and political
            instability which could affect U.S. investments in foreign coun-
            tries. Individual foreign economies may differ favorably or unfa-
            vorably from the U.S. economy in such respects as growth of gross
            domestic product, rate of inflation, capital reinvestment, re-
            sources, self-sufficiency, and balance of payments position. The
            securities markets, values of securities, yields, and risks asso-
            ciated with securities markets may change independently of each
            other. Additionally, foreign securities and dividends and interest
            payable on those securities may be subject to foreign taxes, in-
            cluding taxes withheld from payments on those securities. Foreign
            securities often trade with less frequency and volume than domes-
            tic securities and therefore may exhibit greater price volatility.
            Additional costs associated with an investment in foreign securi-
            ties may include higher custodial fees than apply to domestic cus-
            todial arrangements and transaction costs of foreign currency con-
            versions. Changes in foreign exchange rates also will affect the
            value of securities denominated or quoted in currencies other than
            the U.S. dollar.
               A Fund's investments in foreign currency denominated debt obli-
            gations and hedging activities will likely produce a difference
            between its book income and its taxable income. This difference
            may cause a portion of the Fund's income distributions to consti-
            tute returns of capital for tax purposes or require the Fund to
            make distributions exceeding book income to qualify as a regulated
            investment company for federal tax purposes.

               Certain of the Funds may invest in the securities of issuers
            based in countries with developing economies. Investing in devel-
            oping (or "emerging market") countries involves certain risks not
            typically associated with investing in U.S. securities, and im-
            poses risks greater than, or in addition to, risks of investing in
            foreign, developed countries. A number of emerging market coun-
            tries restrict, to varying degrees, foreign investment in securi-
            ties. Repatriation of investment income, capital, and the proceeds
            of sales by foreign investors may require governmental registra-
            tion and/or approval in some emerging market countries. A number
            of the currencies of emerging market countries have experienced
            significant declines against the U.S. dollar in recent years, and
            devaluation may occur subsequent to investments in these curren-
            cies by a Fund. Inflation and rapid fluctuations in inflation
            rates have had, and may continue to have, negative effects on the
            economies and securities markets of certain emerging market coun-
            tries.   
 

                                               November 1, 1998 Prospectus   27
<PAGE>
 

            Many of the emerging securities markets are relatively small, have
            low trading volumes, suffer periods of relative illiquidity, and
            are characterized by significant price volatility. There is a risk
            in emerging market countries that a future economic or political
            crisis could lead to price controls, forced mergers of companies,
            expropriation or confiscatory taxation, seizure, nationalization,
            or creation of government monopolies, any of which may have a det-
            rimental effect on a Fund's investment.
               Additional risks of investing in emerging market countries may
            include: currency exchange rate fluctuations; greater social, eco-
            nomic and political uncertainty and instability (including the
            risk of war); more substantial governmental involvement in the
            economy; less governmental supervision and regulation of the secu-
            rities markets and participants in those markets; unavailability
            of currency hedging techniques in certain emerging market coun-
            tries; the fact that companies in emerging market countries may be
            newly organized and may be smaller and less seasoned companies;
            the difference in, or lack of, auditing and financial reporting
            standards, which may result in unavailability of material informa-
            tion about issuers; the risk that it may be more difficult to ob-
            tain and/or enforce a judgment in a court outside the United
            States; and significantly smaller market capitalization of securi-
            ties markets. Also, any change in the leadership or policies of
            emerging market countries, or the countries that exercise a sig-
            nificant influence over those countries, may halt the expansion of
            or reverse the liberalization of foreign investment policies now
            occurring and adversely affect existing investment opportunities.
               In addition, emerging securities markets may have different
            clearance and settlement procedures, which may be unable to keep
            pace with the volume of securities transactions or otherwise make
            it difficult to engage in such transactions. Settlement problems
            may cause a Fund to miss attractive investment opportunities, hold
            a portion of its assets in cash pending investment, or delay in
            disposing of a portfolio security. Such a delay could result in
            possible liability to a purchaser of the security.

            SPECIAL RISKS OF INVESTING IN RUSSIAN AND OTHER EASTERN EUROPEAN
            SECURITIES  The International Fund may invest a portion of its as-
            sets in securities of issuers located in Russia and in other East-
            ern European countries. While investments in securities of such
            issuers are subject generally to the same risks associated with
            investments in other emerging market countries described above,
            the political, legal and operational risks of investing in Russian
            and other Eastern European issuers, and of having assets custodied
            within these countries, may be particularly acute. A risk of par-
            ticular note with respect to direct investment in Russian securi-
            ties is the way in which ownership of shares of companies is nor-
            mally recorded. When a Fund invests in a Russian issuer, it will
            normally receive a "share extract," but that extract is not le-
            gally determinative of ownership. The official record of ownership
            of a company's share is maintained by the company's share regis-
            trar. Such share registrars are completely under the control of
            the issuer, and investors are provided with few legal rights
            against such registrars. Please refer to "Investment Objectives
            and Policies-Foreign Securities" in the Statement of Additional
            Information for a more complete description of these and other
            risks associated with investments in securities of Russian and
            other Eastern European issuers. 

FOREIGN     Foreign currency exchange rates may fluctuate significantly over
CURRENCY    short periods of time. They generally are determined by the forces
TRANSACTIONSof supply and demand in the foreign exchange markets and the rela-
            tive merits of investments in different countries, actual or per-
            ceived changes in interest rates and other complex factors, as
            seen from an international perspective. Currency exchange rates
            also can be affected unpredictably by intervention (or the failure
            to intervene) by U.S. or foreign governments or central banks, or
            by currency controls or political developments in the U.S. or
            abroad. For example, significant uncertainty surrounds the pro-
            posed introduction of the euro (a common currency unit for the Eu-
            ropean Union) in January 1999 and its effect on the value of secu-
            rities denominated in local European currencies. These and other
            currencies in which the Funds' assets are denominated may be de-
            valued against the U.S. dollar, resulting in a loss to the Funds.
            For a more complete discussion of foreign currency risks (includ-
            ing those associated with the euro), please see "Investment Objec-
            tives and Policies--Foreign Currencies" in the Statement of Addi-
            tional Information. 
 

28   PIMCO Funds: Multi-Manager Series
<PAGE>
 

               The Balanced, Renaissance, Growth, Target, Opportunity, Inter-
            national, Innovation and Precious Metals Funds may enter into for-
            ward foreign currency exchange contracts to reduce the risks of
            adverse changes in foreign exchange rates. In addition, the Bal-
            anced, International and Precious Metals Funds may buy and sell
            foreign currency futures contracts and options on foreign curren-
            cies and foreign currency futures. All of the Funds that may buy
            or sell foreign currencies may enter into forward foreign currency
            exchange contracts to reduce the risks of adverse changes in for-
            eign exchange rates. A forward foreign currency exchange contract
            involves an obligation to purchase or sell a specific currency at
            a future date, which may be any fixed number of days from the date
            of the contract agreed upon by the parties, at a price set at the
            time of the contract. By entering into a forward foreign currency
            exchange contract, the Fund "locks in" the exchange rate between
            the currency it will deliver and the currency it will receive for
            the duration of the contract. As a result, a Fund reduces its ex-
            posure to changes in the value of the currency it will deliver and
            increases its exposure to changes in the value of the currency it
            will exchange into. The effect on the value of a Fund is similar
            to selling securities denominated in one currency and purchasing
            securities denominated in another currency. Contracts to sell for-
            eign currency would limit any potential gain which might be real-
            ized by a Fund if the value of the hedged currency increases. A
            Fund may enter into these contracts for the purpose of hedging
            against foreign exchange risk arising from the Fund's investment
            or anticipated investment in securities denominated in foreign
            currencies. Suitable hedging transactions may not be available in
            all circumstances and there can be no assurance that a Fund will
            engage in such transactions at any given time or from time to
            time. Also, such transactions may not be successful and may elimi-
            nate any chance for a Fund to benefit from favorable fluctuations
            in relevant foreign currencies. The International Fund may also
            enter into hedging contracts for purposes of increasing exposure
            to a foreign currency or to shift exposure to foreign currency
            fluctuations from one currency to another. To the extent that it
            does so, the International Fund will be subject to the additional
            risk that the relative value of currencies will be different than
            anticipated by the Fund's Portfolio Manager. The International may
            use one currency (or a basket of currencies) to hedge against ad-
            verse changes in the value of another currency (or a basket of
            currencies) when exchange rates between the two currencies are
            positively correlated. The Fund will segregate assets determined
            to be liquid by the Adviser or a Portfolio Manager in accordance
            with procedures established by the Board of Trustees to cover its
            obligations under forward foreign currency exchange contracts en-
            tered into for non-hedging purposes. 
 
MONEY       Each of the Funds may invest at least a portion of its assets in
MARKET      the following kinds of money market instruments:
INSTRUMENTS    (1)short-term U.S. Government securities;

               (2) certificates of deposit, bankers' acceptances and other
                   bank obligations rated in the two highest rating categories
                   by at least two NRSROs, or, if rated by only one NRSRO, in
                   such agency's two highest grades, or, if unrated,
                   determined to be of comparable quality by the Adviser or a
                   Portfolio Manager. Bank obligations must be those of a bank
                   that has deposits in excess of $2 billion or that is a
                   member of the Federal Deposit Insurance Corporation. A Fund
                   may invest in obligations of U.S. branches or subsidiaries
                   of foreign banks ("Yankee dollar obligations") or foreign
                   branches of U.S. banks ("Eurodollar obligations"); 

               (3) commercial paper rated in the two highest rating categories
                   by at least two NRSROs, or, if rated by only one NRSRO, in
                   such agency's two highest grades, or, if unrated, deter-
                   mined to be of comparable quality by the Adviser or a Port-
                   folio Manager; 

               (4) corporate obligations with a remaining maturity of 397 days
                   or less whose issuers have outstanding short-term debt ob-
                   ligations rated in the highest rating category by at least
                   two NRSROs, or, if rated by only one NRSRO, in such
                   agency's highest grade, or, if unrated, determined to be of
                   comparable quality by the Adviser or a Portfolio Manager;
                   and 
               (5) repurchase agreements with domestic commercial banks or reg-
                   istered broker-dealers.
 

                                               November 1, 1998 Prospectus   29
<PAGE>
 
MORTGAGE-   All Funds that may purchase debt securities for investment pur-
RELATEDAND  poses (and in particular, the Balanced Fund) may invest in mort-
OTHERASSET- gage-related securities, and in other asset-backed securities (un-
BACKED      related to mortgage loans) that are offered to investors currently
SECURITIES  or in the future. The value of some mortgage-related or asset-
            backed securities in which the Funds invest may be particularly
            sensitive to changes in prevailing interest rates, and, like other
            fixed income investments, the ability of a Fund to successfully
            utilize these instruments may depend in part upon the ability of
            the Portfolio Manager to forecast interest rates and other eco-
            nomic factors correctly.
 
            MORTGAGE PASS-THROUGH SECURITIES are securities representing in-
            terests in "pools" of mortgage loans secured by residential or
            commercial real property in which payments of both interest and
            principal on the securities are generally made monthly, in effect
            "passing through" monthly payments made by the individual borrow-
            ers on the mortgage loans which underlie the securities (net of
            fees paid to the issuer or guarantor of the securities). Early re-
            payment of principal on some mortgage-related securities (arising
            from prepayments of principal due to sale of the underlying prop-
            erty, refinancing, or foreclosure, net of fees and costs which may
            be incurred) may expose a Fund to a lower rate of return upon re-
            investment of principal. Also, if a security subject to prepayment
            has been purchased at a premium, the value of the premium would be
            lost in the event of prepayment. Like other fixed income securi-
            ties, when interest rates rise, the value of a mortgage-related
            security generally will decline; however, when interest rates are
            declining, the value of mortgage-related securities with prepay-
            ment features may not increase as much as other fixed income secu-
            rities. The rate of prepayments on underlying mortgages will af-
            fect the price and volatility of a mortgage-related security, and
            may have the effect of shortening or extending the effective matu-
            rity of the security beyond what was anticipated at the time of
            purchase. To the extent that unanticipated rates of prepayment on
            underlying mortgages increase the effective maturity of a mort-
            gage-related security, the volatility of such security can be ex-
            pected to increase.
               Payment of principal and interest on some mortgage pass-through
            securities (but not the market value of the securities themselves)
            may be guaranteed by the full faith and credit of the U.S. Govern-
            ment (in the case of securities guaranteed by the Government Na-
            tional Mortgage Association ("GNMA")); or guaranteed by agencies
            or instrumentalities of the U.S. Government (in the case of secu-
            rities guaranteed by the Federal National Mortgage Association
            ("FNMA") or the Federal Home Loan Mortgage Corporation ("FHLMC"),
            which are supported only by the discretionary authority of the
            U.S. Government to purchase the agency's obligations). Mortgage-
            related securities created by non-governmental issuers (such as
            commercial banks, savings and loan institutions, private mortgage
            insurance companies, mortgage bankers and other secondary market
            issuers) may be supported by various forms of insurance or guaran-
            tees, including individual loan, title, pool and hazard insurance
            and letters of credit, which may be issued by governmental enti-
            ties, private insurers or the mortgage poolers.
 
            COLLATERALIZED MORTGAGE OBLIGATIONS ("CMOs") are hybrid mortgage-
            related instruments. Similar to a bond, interest and pre-paid
            principal on a CMO are paid, in most cases, on a monthly basis.
            CMOs may be collateralized by whole mortgage loans but are more
            typically collateralized by portfolios of mortgage pass-through
            securities guaranteed by GNMA, FHLMC, or FNMA. CMOs are structured
            into multiple classes, with each class bearing a different stated
            maturity. Monthly payments of principal, including prepayments,
            are first returned to investors holding the shortest maturity
            class; investors holding the longer maturity classes receive prin-
            cipal only after the first class has been retired. CMOs that are
            issued or guaranteed by the U.S. Government or by any of its agen-
            cies or instrumentalities will be considered U.S. Government secu-
            rities by a Fund, while other CMOs, even if collateralized by U.S.
            Government securities, will have the same status as other pri-
            vately issued securities for purposes of applying a Fund's diver-
            sification tests.
 
            COMMERCIAL MORTGAGE-BACKED SECURITIES include securities that re-
            flect an interest in, and are secured by, mortgage loans on com-
            mercial real property. The market for commercial mortgage-backed
            securities developed more recently and in terms of total outstand-
            ing principal amount of issues is relatively small compared to the
            market for residential single-family mortgage-backed securities.
            Many of the risks of investing in commercial mortgage-backed secu-
            rities reflect the risks
 

30   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            of investing in the real estate securing the underlying mortgage
            loans. These risks reflect the effects of local and other economic
            conditions on real estate markets, the ability of tenants to make
            loan payments, and the ability of a property to attract and retain
            tenants. Commercial mortgage-backed securities may be less liquid
            and exhibit greater price volatility than other types of mortgage-
            related or asset-backed securities.
 
            MORTGAGE-RELATED SECURITIES include securities other than those
            described above that directly or indirectly represent a participa-
            tion in, or are secured by and payable from, mortgage loans on
            real property, such as CMO residuals or stripped mortgage-backed
            securities ("SMBS"), and may be structured in classes with rights
            to receive varying proportions of principal and interest.
               A common type of SMBS will have one class receiving some of the
            interest and most of the principal from the mortgage assets, while
            the other class will receive most of the interest and the remain-
            der of the principal. In the most extreme case, one class will re-
            ceive all of the interest (the interest-only, or "IO" class),
            while the other class will receive all of the principal (the prin-
            cipal-only, or "PO" class). The yield to maturity on an IO class
            is extremely sensitive to the rate of principal payments (includ-
            ing prepayments) on the related underlying mortgage assets, and a
            rapid rate of principal payments may have a material adverse ef-
            fect on a Fund's yield to maturity from these securities. For a
            discussion of the characteristics of some of these instruments,
            see the Statement of Additional Information.
 
CONVERTIBLE Many of the Funds may invest in convertible securities. Convert-
SECURITIES  ible securities are generally preferred stocks or fixed income se-
            curities that are convertible into common stock at either a stated
            price or a stated rate. The price of the convertible security will
            normally vary in some proportion to changes in the price of the
            underlying common stock because of this conversion feature. A con-
            vertible security will normally also provide a fixed income
            stream. For this reason, the convertible security may not decline
            in price as rapidly as the underlying common stock.
               A Fund's Portfolio Manager will select convertible securities
            to be purchased by the Fund based primarily upon its evaluation of
            the fundamental investment characteristics and growth prospects of
            the issuer of the security. As a fixed income security, a convert-
            ible security tends to increase in market value when interest
            rates decline and to decrease in value when interest rates rise.
            While convertible securities generally offer lower interest or
            dividend yields than non-convertible fixed income securities of
            similar quality, their value tends to increase as the market value
            of the underlying stock increases and to decrease when the value
            of the underlying stock decreases.
               The Renaissance Fund may invest in so-called "synthetic con-
            vertible securities," which are composed of two or more different
            securities whose investment characteristics, taken together, re-
            semble those of convertible securities. For example, the Renais-
            sance Fund may purchase a non-convertible debt security and a war-
            rant or option. The synthetic convertible differs from the true
            convertible security in several respects. Unlike a true convert-
            ible security, which is a single security having a unitary market
            value, a synthetic convertible comprises two or more separate se-
            curities, each with its own market value. Therefore, the "market
            value" of a synthetic convertible is the sum of the values of its
            fixed income component and its convertible component. For this
            reason, the values of a synthetic convertible and a true convert-
            ible security may respond differently to market fluctuations.


RISKS OF    The Balanced, Renaissance and Growth Funds may invest a portion of
HIGH YIELD  their assets in fixed income securities rated lower than Baa by
SECURITIES  Moody's or lower than BBB by S&P but rated at least B by Moody's
("JUNK      or S&P or, if not rated, determined by the Portfolio Manager to be
BONDS")     of comparable quality. In addition, the Renaissance Fund may in-
            vest in convertible securities rated below B by Moody's or S&P
            (or, if unrated, considered by the Portfolio Manager to be of com-
            parable quality). Securities rated lower than Baa by Moody's or
            lower than BBB by S&P are sometimes referred to as "high yield" or
            "junk" bonds. Investors should consider the risks associated with
            high yield securities before investing in these Funds. Although
            each of the Renaissance and Growth Funds reserves the right to do
            so at any time, as of the date of this Prospectus, neither Fund
            invests nor has the present intention to invest more than 5% of
            its assets in high yield securities or junk bonds. 

 
                                               November 1, 1998 Prospectus   31
<PAGE>
 

               Investing in high yield securities involves special risks in
            addition to the risks associated with investments in higher rated
            fixed income securities. While offering a greater potential oppor-
            tunity for capital appreciation and higher yields than investments
            in higher rated debt securities, high yield securities typically
            entail greater potential price volatility and may be less liquid
            than investment grade debt. High yield securities may be regarded
            as predominately speculative with respect to the issuer's continu-
            ing ability to meet principal and interest payments. Analysis of
            the creditworthiness of issuers of high yield securities may be
            more complex than for issuers of higher quality debt securities,
            and achievement of a Fund's investment objective may, to the ex-
            tent of its investments in high yield securities, depend more
            heavily on the Portfolio Manager's creditworthiness analysis than
            would be the case if the Fund were investing in higher quality se-
            curities. High yield securities may be more susceptible to real or
            perceived adverse economic and competitive industry conditions
            than higher grade securities.

            For additional discussion of the characteristics of lower rated
            fixed income securities, see the Statement of Additional Informa-
            tion. Ratings assigned to fixed income securities are described in
            the Appendix to the Statement of Additional Information.

DERIVATIVE  To the extent permitted by the investment objective and policies
INSTRUMENTS of each Fund, a Fund may purchase and write call and put options
            on securities, securities indexes and foreign currencies, and en-
            ter into futures contracts and use options on futures contracts as
            further described below. In pursuit of their investment objec-
            tives, the Balanced, Renaissance, Tax-Efficient Equity, Growth,
            Target, Opportunity, International, Innovation and Precious Metals
            Funds may engage in the purchase and writing of call and put op-
            tions on securities and securities indexes and enter into futures
            contracts and options thereon, including securities index futures
            contracts and options thereon. The Precious Metals Fund may pur-
            chase and write options on commodities indexes. The Funds that may
            invest in foreign-currency denominated securities may engage in
            the purchase and writing of call and put options on foreign cur-
            rencies. The Balanced and Tax-Efficient Equity Funds may also en-
            ter into swap agreements with respect to securities indexes. The
            Balanced Fund may also enter into swap agreements with respect to
            foreign currencies and interest rates. The Funds may (but are not
            required to) use these techniques to hedge against changes in in-
            terest rates, foreign currency exchange rates or securities pric-
            es; and for the International Fund, to increase exposure to a for-
            eign currency, to shift exposure to foreign currency fluctuations
            from one country to another, or as part of its overall investment
            strategy. Each Fund will segregate assets determined to be liquid
            by the Adviser or a Portfolio Manager in accordance with proce-
            dures established by the Board of Trustees (or, as permitted by
            applicable regulation, enter into certain offsetting positions) to
            cover its obligations under options, futures, and swaps to limit
            leveraging of the Fund. 

               Derivative instruments are considered for these purposes to
            consist of securities or other instruments whose value is derived
            from or related to the value of some other instrument or asset,
            and not to include those securities whose payment of principal
            and/or interest depend upon cash flows from underlying assets,
            such as mortgage-related or asset-backed securities. See "Mort-
            gage-Related and Other Asset-Backed Securities." The value of some
            derivative instruments in which the Funds may invest may be par-
            ticularly sensitive to changes in prevailing interest rates, and,
            like the other investments of the Funds, the ability of a Fund to
            successfully utilize these instruments may depend in part upon the
            ability of the Portfolio Manager to forecast interest rates and
            other economic factors correctly. If the Portfolio Manager incor-
            rectly forecasts such factors and has taken positions in deriva-
            tive instruments contrary to prevailing market trends, the Funds
            could be exposed to the risk of loss. 

               The Funds might not employ any of the strategies described be-
            low, and no assurance can be given that any strategy used will
            succeed. If the Portfolio Manager incorrectly forecasts interest
            rates, market values or other economic factors in utilizing a de-
            rivatives strategy for a Fund, the Fund might have been in a bet-
            ter position if it had not entered into the transaction at all.
            Also, suitable derivative transactions may not be available in all
            circumstances. The use of these strategies involves certain spe-
            cial risks, including a possible imperfect correlation, or even no
            correlation, between price movements of derivative instruments and
            price movements of related investments. While some strategies in-
            volving derivative instruments can reduce the risk of loss, they
            can also reduce the opportunity for gain or even result in 
 

32   PIMCO Funds: Multi-Manager Series
<PAGE>
 

 
            losses by offsetting favorable price movements in related invest-
            ments or otherwise, due to the possible inability of a Fund to
            purchase or sell a portfolio security at a time that would be fa-
            vorable or the possible need to sell a portfolio security at a
            disadvantageous time because the Fund is required to maintain as-
            set coverage or offsetting positions in connection with transac-
            tions in derivative instruments, and the possible inability of a
            Fund to close out or to liquidate its derivatives positions. In
            addition, a Fund's use of such instruments may cause the Fund to
            realize higher amounts of short-term capital gains (generally
            taxed at ordinary income tax rates) than if it had not used such
            instruments. 
 
            OPTIONS ON SECURITIES, SECURITIES INDEXES, AND CURRENCIES Certain
            Funds may purchase put options on securities. One purpose of pur-
            chasing put options is to protect holdings in an underlying or re-
            lated security against a substantial decline in market value.
            These Funds may also purchase call options on securities. One pur-
            pose of purchasing call options is to protect against substantial
            increases in prices of securities the Fund intends to purchase
            pending its ability to invest in such securities in an orderly
            manner. A Fund may sell put or call options it has previously pur-
            chased, which could result in a net gain or loss depending on
            whether the amount realized on the sale is more or less than the
            premium and other transaction costs paid on the put or call option
            which is sold. A Fund may write a call or put option only if the
            option is "covered" by the Fund holding a position in the under-
            lying securities or by other means which would permit immediate
            satisfaction of the Fund's obligation as writer of the option.
            Prior to exercise or expiration, an option may be closed out by an
            offsetting purchase or sale of an option of the same series.
               The purchase and writing of options involves certain risks.
            During the option period, the covered call writer has, in return
            for the premium on the option, given up the opportunity to profit
            from a price increase in the underlying security above the exer-
            cise price, but, as long as its obligation as a writer continues,
            has retained the risk of loss should the price of the underlying
            security decline. The writer of an option has no control over the
            time when it may be required to fulfill its obligation as a writer
            of the option. Once an option writer has received an exercise no-
            tice, it cannot effect a closing purchase transaction in order to
            terminate its obligation under the option and must deliver the un-
            derlying security at the exercise price. If a put or call option
            purchased by the Fund is not sold when it has remaining value, and
            if the market price of the underlying security remains equal to or
            greater than the exercise price (in the case of a put), or remains
            less than or equal to the exercise price (in the case of a call),
            the Fund will lose its entire investment in the option. Also,
            where a put or call option on a particular security is purchased
            to hedge against price movements in a related security, the price
            of the put or call option may move more or less than the price of
            the related security. There can be no assurance that a liquid mar-
            ket will exist when a Fund seeks to close out an option position.
            Furthermore, if trading restrictions or suspensions are imposed on
            the options markets, a Fund may be unable to close out a position.
               For each of the Renaissance, Growth, Target, Opportunity, In-
            ternational, Innovation, and Precious Metals Funds, in the case of
            a written call option on a securities index, the Fund will own
            corresponding securities whose historic volatility correlates with
            that of the index.
 
               The Balanced, International and Precious Metals Funds may buy
            or sell put and call options on foreign currencies as a hedge
            against changes in the value of the U.S. dollar (or another cur-
            rency) in relation to a foreign currency in which a Fund's securi-
            ties may be denominated. Currency options traded on U.S. or other
            exchanges may be subject to position limits which may limit the
            ability of a Fund to reduce foreign currency risk using such op-
            tions.  
               Over-the-counter options in which certain Funds may invest dif-
            fer from traded options in that they are two-party contracts, with
            price and other terms negotiated between buyer and seller, and
            generally do not have as much market liquidity as exchange-traded
            options. The Funds may be required to treat as illiquid over-the-
            counter options purchased and securities being used to cover cer-
            tain written over-the-counter options.
  
            SWAP AGREEMENTS The Balanced Fund may enter into swap agreements
            to hedge against changes in interest rates, foreign currency ex-
            change rates or securities prices. The Tax-Efficient Equity Fund
            may enter into equity index swap agreements for purposes of gain-
            ing exposure to the stocks making up an index of securities with-
            out actually purchasing 
 
                                                  November 1, 1998 Prospectus 33
<PAGE>
 

            those stocks. Swap agreements are two-party contracts entered into
            primarily by institutional investors for periods ranging from a
            few weeks to more than one year. In a standard swap transaction,
            two parties agree to exchange the returns (or differentials in
            rates of return) earned or realized on particular predetermined
            investments or instruments, which may be adjusted for an interest
            factor. The gross returns to be exchanged or "swapped" between the
            parties are generally calculated with respect to a "notional
            amount," i.e., the return on or increase in value of a particular
            dollar amount invested at a particular interest rate, or in a
            "basket" of securities representing a particular index.
 
               Most swap agreements entered into by the Funds calculate the
            obligations of the parties to the agreement on a "net basis." Con-
            sequently, a Fund's current obligations (or rights) under a swap
            agreement will generally be equal only to the net amount to be
            paid or received under the agreement based on the relative values
            of the positions held by each party to the agreement (the "net
            amount"). A Fund's current obligations under a swap agreement will
            be accrued daily (offset against amounts owed to the Fund), and
            any accrued but unpaid net amounts owed to a swap counterparty
            will be covered by the segregation of assets determined to be liq-
            uid by the Portfolio Manager in accordance with procedures estab-
            lished by the Board of Trustees to limit any potential leveraging
            of the Fund's portfolio. Obligations under swap agreements so cov-
            ered will not be construed to be "senior securities" for purposes
            of a Fund's investment restriction concerning senior securities. A
            Fund will not enter into a swap agreement with any single party if
            the net amount owed or to be received under existing contracts
            with that party would exceed 5% of the Fund's assets. 
  
              Whether a Fund's use of swap agreements will be successful in
            furthering its investment objective will depend on the Portfolio
            Manager's ability to predict correctly whether certain types of
            investments are likely to produce greater returns than other in-
            vestments. Because they are two-party contracts and because they
            may have terms of greater than seven days, swap agreements may be
            considered to be illiquid investments. Moreover, a Fund bears the
            risk of loss of the amount expected to be received under a swap
            agreement in the event of the default or bankruptcy of a swap
            agreement counterparty. The Funds will enter into swap agreements
            only with counterparties that meet certain standards for credit-
            worthiness (generally, such counterparties would have to be eligi-
            ble counterparties under the terms of the Funds' repurchase agree-
            ment guidelines). The swaps market is a relatively new market and
            is largely unregulated. It is possible that developments in the
            swaps market, including potential government regulation, could ad-
            versely affect a Fund's ability to terminate existing swap agree-
            ments or to realize amounts to be received under such 
            agreements.

            FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS Certain Funds
            may enter into futures contracts and options thereon. The Balanced
            Fund may invest in interest rate futures contracts and options
            thereon. The Precious Metals Fund may purchase and sell futures
            contracts on precious metals (such as gold), and purchase and
            write options on precious metals futures contracts. The Balanced,
            International and Precious Metals Funds may invest in foreign ex-
            change futures contracts and options thereon ("futures options")
            that are traded on a U.S. or foreign exchange or board of trade,
            or similar entity, or quoted on an automated quotation system.
            These Funds may engage in such futures transactions as an adjunct
            to their securities activities. 
 
               There are several risks associated with the use of futures and
            futures options for hedging purposes. There can be no guarantee
            that there will be a correlation between price movements in the
            hedging vehicle and in the portfolio securities being hedged. An
            incorrect correlation could result in a loss on both the hedged
            securities in a Fund and the hedging vehicle, so that the portfo-
            lio return might have been greater had hedging not been attempted.
            There can be no assurance that a liquid market will exist at a
            time when a Fund seeks to close out a futures contract or a
            futures option position. Most futures exchanges and boards of
            trade limit the amount of fluctuation permitted in futures con-
            tract prices during a single day; once the daily limit has been
            reached on a particular contract, no trades may be made that day
            at a price beyond that limit. In addition, certain of these in-
            struments are relatively new and without a significant trading
            history. As a result, there is no assurance that an active second-
            ary market will develop or continue to exist. Lack of a liquid
            market for any reason may prevent a Fund from liquidating an unfa-
            vorable position, and the Fund would remain obligated to meet mar-
            gin requirements until the position is closed. 
 
 
34   PIMCO Funds: Multi-Manager Series
<PAGE>
 


            INDEX FUTURES The Balanced, Renaissance, Tax-Efficient Equity,
            Growth, Target, Opportunity, International, Innovation and Pre-
            cious Metals Funds may purchase and sell futures contracts on var-
            ious securities indexes ("Index Futures") and related options for
            hedging purposes and for investment purposes. A Fund's purchase
            and sale of Index Futures is limited to contracts and exchanges
            which have been approved by the Commodity Futures Trading Commis-
            sion ("CFTC"). 

               The International Fund may invest to a significant degree in
            Index Futures on stock indexes and related options (including
            those which may trade outside of the United States) as an alterna-
            tive to purchasing individual stocks in order to adjust the Fund's
            exposure to a particular market. The Fund may invest in Index
            Futures and related options when the Portfolio Manager believes
            that there are not enough attractive securities available to main-
            tain the standards of diversification and liquidity set for the
            Fund pending investment in such securities if or when they do be-
            come available. Through the use of Index Futures and related op-
            tions, the International Fund may diversify risk in its portfolio
            without incurring the substantial brokerage costs which may be as-
            sociated with investment in the securities of multiple issuers.
            The Fund may also avoid potential market and liquidity problems
            which may result from increases in positions already held by it. 

               A Fund may close open positions on the futures exchanges on
            which Index Futures are traded at any time up to and including the
            expiration day. All positions which remain open at the close of
            the last business day of the contract's life are required to set-
            tle on the next business day (based upon the value of the relevant
            index on the expiration day), with settlement made with the appro-
            priate clearing house. Because the specific procedures for trading
            foreign stock Index Futures on futures exchanges are still under
            development, additional or different margin requirements as well
            as settlement procedures may be applicable to foreign stock Index
            Futures at the time a Fund purchases such instruments.

               Positions in Index Futures may be closed out by a Fund only on
            the futures exchange upon which the Index Futures are then traded.
            There can be no assurance that a liquid market will exist for any
            particular contract at any particular time. Also, the price of In-
            dex Futures may not correlate perfectly with movement in the rele-
            vant index due to certain market distortions. First, all partici-
            pants in the futures market are subject to margin deposit and
            maintenance requirements. Rather than meeting additional margin
            deposit requirements, investors may close futures contracts
            through offsetting transactions which could distort the normal re-
            lationship between the index and futures markets. Second, the de-
            posit requirements in the futures market are less onerous than
            margin requirements in the securities market, and as a result, the
            futures market may attract more speculators than does the securi-
            ties market. Increased participation by speculators in the futures
            market may also cause temporary price distortions. In addition,
            trading hours for foreign stock Index Futures may not correspond
            perfectly to hours of trading on the foreign exchange to which a
            particular foreign stock Index Future relates. This may result in
            a disparity between the price of Index Futures and the value of
            the relevant index due to the lack of continuous arbitrage between
            the Index Futures price and the value of the underlying index. 


               The Funds may only enter into futures contracts or futures op-
            tions which are standardized and traded on a U.S. or foreign ex-
            change or board of trade, or similar entity, or quoted on an auto-
            mated quotation system. Each Fund may use futures contracts and
            related options for "bona fide hedging" purposes, as such term is
            defined in applicable regulations of the CFTC, or, with respect to
            positions in futures and related options that do not qualify as
            "bona fide hedging" positions, may enter such positions only to
            the extent that aggregate initial margin deposits plus premiums
            paid by it for open futures option positions, less the amount by
            which any such positions are "in-the-money," would not exceed 5%
            of the Fund's net assets. 
 
PRECIOUS    The Precious Metals Fund will concentrate its investments in the
METALS      precious metals industry. Prices of precious metals can be ex-
            pected to respond to changes in rates of inflation and to percep-
            tions of economic and political instability. The values of compa-
            nies engaged in precious metal-related activities whose securities
            are principally traded on foreign securities exchanges may also be
            affected by changes in the exchange rate between the relevant for-
            eign currency and the U.S. dollar. Based on historical experience,
            the prices of precious metals and of securities of companies en-
            gaged in
 

                                                November 1, 1998 Prospectus   35
<PAGE>
 
            precious metal-related activities may be subject to extreme fluc-
            tuations, reflecting wider economic or political instability or
            for other reasons.
 
LOANS OF    For the purpose of achieving income, each Fund may lend its port-
PORTFOLIO   folio securities to brokers, dealers, and other financial institu-
SECURITIES  tions, provided:
               (i)  the loan is secured continuously by collateral consisting
                    of U.S. Government securities, cash or cash equivalents
                    (negotiable certificates of deposit, bankers' acceptances
                    or letters of credit) maintained on a daily mark-to-market
                    basis in an amount at least equal to the current market
                    value of the securities loaned;
               (ii) the Fund may at any time call the loan and obtain the re-
                    turn of the securities loaned;
               (iii) the Fund will receive any interest or dividends paid on
                     the loaned securities; and
               (iv) the aggregate market value of securities loaned will not
                    at any time exceed the Fund's limitation on lending its
                    portfolio securities.
              Each Fund's performance will continue to reflect changes in the
            value of the securities loaned and will also reflect the receipt
            of either interest, through investment of cash collateral by the
            Fund in permissible investments, or a fee, if the collateral is
            U.S. Government securities. Securities lending involves the risk
            of loss of rights in the collateral or delay in recovery of the
            collateral should the borrower fail to return the security loaned
            or become insolvent. The Funds may pay lending fees to the party
            arranging the loan.
 
SHORT SALES Each Fund may from time to time make short sales involving securi-
            ties held in the Fund's portfolio or which the Fund has the right
            to acquire without the payment of further consideration. For these
            purposes, a Fund may also hold or have the right to acquire secu-
            rities which, without the payment of any further consideration,
            are convertible into or exchangeable for the securities sold
            short. Short sales expose the Fund to the risk that it will be re-
            quired to acquire, convert or exchange securities to cover its
            short position at a time when the securities sold short have ap-
            preciated in value, thus resulting in a loss to the Fund.


WHEN-       Each Fund may purchase securities which it is eligible to purchase
ISSUED,     on a when-issued basis, may purchase and sell such securities for
DELAYED     delayed delivery and may make contracts to purchase such securi-
DELIVERY    ties for a fixed price at a future date beyond normal settlement
AND         time (forward commitments). When-issued transactions, delayed de-
FORWARD     livery purchases and forward commitments involve a risk of loss if
COMMITMENT  the value of the securities declines prior to the settlement date,
TRANSACTIONSwhich risk is in addition to the risk of decline in the value of
            the Fund's other assets. Typically, no income accrues on securi-
            ties a Fund has committed to purchase prior to the time delivery
            of the securities is made, although a Fund may earn income on se-
            curities it has segregated. 
 
REPURCHASE  For the purposes of maintaining liquidity and achieving income,
AGREEMENTS  each Fund may enter into repurchase agreements, which entail the
            purchase of a portfolio-eligible security from a bank or broker-
            dealer that agrees to repurchase the security at the Fund's cost
            plus interest within a specified time (normally one day). If the
            party agreeing to repurchase should default, as a result of bank-
            ruptcy or otherwise, the Fund will seek to sell the securities
            which it holds, which action could involve procedural costs or de-
            lays in addition to a loss on the securities if their value should
            fall below their repurchase price. Those Funds whose investment
            objectives do not include the earning of income will invest in re-
            purchase agreements only as a cash management technique with re-
            spect to that portion of the portfolio maintained in cash. Each
            Fund will limit its investment in repurchase agreements maturing
            in more than seven days consistent with the Fund's policy on in-
            vestment in illiquid securities.
 
REVERSE     A reverse repurchase agreement may for some purposes be considered
REPURCHASE  borrowing that involves the sale of a security by a Fund and its
AGREEMENTS  agreement to repurchase the instrument at a specified time and
AND OTHER   price. The Fund will segregate assets determined to be liquid by
BORROWINGS  the Adviser or Portfolio Manager in accordance with procedures es-
            tablished by the Board 


36   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            of Trustees to cover its obligations under reverse repurchase
            agreements. Reverse repurchase agreements will be subject to the
            Funds' limitations on borrowings. A Fund also may borrow money for
            investment purposes subject to any policies of the Fund currently
            described in this Prospectus or in the Statement of Additional In-
            formation. Such a practice will result in leveraging of a Fund's
            assets. Leverage will tend to exaggerate the effect on net asset
            value of any increase or decrease in the value of a Fund's portfo-
            lio and may cause a Fund to liquidate portfolio positions when it
            would not be advantageous to do so.
 
PORTFOLIO   The length of time a Fund has held a particular security is not
TURNOVER    generally a consideration in investment decisions. The investment
            policies of a Fund may lead to frequent changes in the Fund's in-
            vestments, particularly in periods of volatile market movements. A
            change in the securities held by a Fund is known as "portfolio
            turnover." High portfolio turnover (e.g., over 100%) involves cor-
            respondingly greater expenses to a Fund, including brokerage com-
            missions or dealer mark-ups and other transaction costs on the
            sale of securities and reinvestments in other securities. See
            "Management of the Trust--Portfolio Transactions." Such sales may
            result in realization of taxable capital gains (including short-
            term capital gains which are generally taxed at ordinary income
            tax rates). See "Taxes." Portfolio turnover rates for fiscal 1998
            and 1997 for the Renaissance, Growth, Target, Opportunity, Inter-
            national, Innovation and Precious Metals Funds and for fiscal 1997
            for the remaining Funds (other than the Tax-Efficient Equity and
            Value 25 Funds) are set forth under "Financial Highlights." Port-
            folio turnover rates for the remaining Funds for fiscal 1997 were
            as follows: Balanced--199%; Equity Income--45%; Value--71%; Capi-
            tal Appreciation--87%; Mid-Cap Growth--82%; and Small-Cap Value--
            48%.  The annual portfolio turnover rate for the Tax-Efficient Eq-
            uity Fund is expected to be less than 40%. The annual portfolio
            turnover rate for the Value 25 Fund is expected to be less than
            150%. 
 
ILLIQUID    Each Fund may invest in securities that are illiquid so long as no
SECURITIES  more than 15% of the value of the Fund's net assets (taken at mar-
            ket value at the time of investment) would be invested in such se-
            curities. Certain illiquid securities may require pricing at fair
            value as determined in good faith under the supervision of the
            Board of Trustees. A Portfolio Manager may be subject to signifi-
            cant delays in disposing of illiquid securities, and transactions
            in illiquid securities may entail registration expenses and other
            transaction costs that are higher than those for transactions in
            liquid securities.

               The term "illiquid securities" for this purpose means securi-
            ties that cannot be disposed of within seven days in the ordinary
            course of business at approximately the amount at which a Fund has
            valued the securities. Illiquid securities are considered to in-
            clude, among other things, written over-the-counter options, secu-
            rities or other liquid assets being used as cover for such op-
            tions, repurchase agreements with maturities in excess of seven
            days, certain loan participation interests, fixed time deposits
            which are not subject to prepayment or provide for withdrawal pen-
            alties upon prepayment (other than overnight deposits), securities
            that are subject to legal or contractual restrictions on resale
            (such as privately placed debt securities), and other securities
            which legally or in the Adviser's or a Portfolio Manager's opinion
            may be deemed illiquid (not including securities issued pursuant
            to Rule 144A under the Securities Act of 1933 and certain commer-
            cial paper that the Adviser or a Portfolio Manager has determined
            to be liquid under procedures approved by the Board of 
            Trustees). 
 
           
INVESTMENT 
IN         
INVESTMENT 
COMPANIES   The International Fund may invest up to 10% of its assets in secu-
            rities of other investment companies, such as closed-end manage-
            ment investment companies, or in pooled accounts or other invest-
            ment vehicles which invest in foreign markets. As a shareholder of
            an investment company, the International Fund may indirectly bear
            service and other fees which are in addition to the fees the Fund
            pays its service providers. 
 
CREDIT AND  All fixed income securities are subject to market risk and credit
MARKET RISK risk. Market risk relates to market-induced changes in a
OF          security's value, usually as a result of changes in interest
FIXEDINCOME rates. The value of a Fund's investments in fixed income securi-
SECURITIES  ties will change as the general level of interest rates fluctuate.
            During periods of falling interest rates, the value of a Fund's
            fixed income securities generally rise. Conversely, during periods
            of rising interest rates, the value of a Fund's fixed income secu-
            rities generally decline. Credit risk relates to the ability of
            the issuer to make payments of principal and interest.
 
 
                                                November 1, 1998 Prospectus   37
<PAGE>
 
SERVICE     Many of the services provided to the Funds depend on the smooth
SYSTEMS --  functioning of computer systems. Many systems in use today cannot
YEAR 2000   distinguish between the year 1900 and the year 2000. Should any of
PROBLEM     the service systems fail to process information properly, that
            could have an adverse impact on the Funds' operations and services
            provided to shareholders. The Adviser, Distributor, Shareholder
            Servicing and Transfer Agent, Custodian, and certain other service
            providers to the Funds have reported that each is working toward
            mitigating the risks associated with the so-called "year 2000
            problem." However, there can be no assurance that the problem will
            be corrected in all respects and that the Funds' operations and
            services provided to shareholders will not be adversely affected,
            nor can there be any assurance that the year 2000 problem will not
            have an adverse effect on the entities whose securities are held
            by the Funds or on domestic or global equity markets or economies,
            generally. 
 
"FUNDAMENTAL"
POLICIES
            The investment objective of each of the Renaissance, Tax-Efficient
            Equity, Growth, Value 25, Target, Opportunity, International, In-
            novation and Precious Metals Funds described in this Prospectus
            may be changed by the Board of Trustees without shareholder ap-
            proval. The investment objective of each other Fund is fundamental
            and may not be changed without shareholder approval by vote of a
            majority of the outstanding shares of that Fund. If there is a
            change in a Fund's investment objective, including a change ap-
            proved by shareholder vote, shareholders should consider whether
            the Fund remains an appropriate investment in light of their then
            current financial position and needs.
 
            Performance Information
 
            From time to time the Trust may make available certain information
            about the performance of the Class A, Class B and Class C shares
            of some or all of the Funds. Information about a Fund's perfor-
            mance is based on that Fund's (or its predecessor's) record to a
            recent date and is not intended to indicate future performance.
            Performance information is computed separately for each Fund's
            Class A, Class B and Class C shares in accordance with the formu-
            las described below. Because Class B and Class C shares bear the
            expense of the distribution fee attending the deferred sales
            charge (Class B) and asset based sales charge (Class C) alterna-
            tives and certain other expenses, it is expected that, under nor-
            mal circumstances, the level of performance of a Fund's Class B
            and Class C shares will be lower than that of the Fund's Class A
            shares, although an investment in Class B or Class C shares is not
            reduced by the front-end sales charge generally applicable to an
            investment in Class A shares.
               The total return of Class A, Class B and/or Class C shares of
            all Funds may be included in advertisements or other written mate-
            rial. When a Fund's total return is advertised with respect to its
            Class A, Class B and/or Class C shares, it will be calculated for
            the past year, the past five years, and the past ten years (or if
            the Fund has been offered for a period shorter than one, five or
            ten years, that period will be substituted) since the establish-
            ment of the Fund or its predecessor series of PIMCO Advisors
            Funds, as more fully described in the Statement of Additional In-
            formation. For periods prior to the initial offering date of a
            particular class of shares, total return presentations for the
            class will be based on the historical performance of an older
            class of the Fund (if any) restated, as necessary, to reflect the
            current sales charges (if any) associated with the newer class.
            The older class to be used in each case is set forth in the State-
            ment of Additional Information. For these purposes, the perfor-
            mance of the older class will also be restated to reflect any dif-
            ferent operating expenses (such as different administrative fees
            and/or 12b-1/servicing fee charges) associated with the newer
            class. In certain cases, such a restatement will result in perfor-
            mance of the newer class which is higher than if the performance
            of the older class were not restated to reflect the different op-
            erating expenses of the newer class. In such cases, the Trust's
            advertisements will also, to the extent appropriate, show the
            lower performance figure reflecting the actual operating expenses
            incurred by the older class for periods prior to the initial of-
            fering date of the newer class. Total return for each class is
            measured by comparing the value of an investment in the Fund at
            the beginning of the relevant period (in the case of Class A
            shares, giving effect to the maximum initial sales charge) to the
            redemption value of the investment in the Fund at the end of the
            period (assuming immediate reinvestment of
 

38   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            any dividends or capital gains distributions at net asset value
            and giving effect to the deduction of the maximum CDSC which would
            be payable). Total return may be advertised using alternative
            methods that reflect all elements of return, but that may be ad-
            justed to reflect the cumulative impact of alternative fee and ex-
            pense structures, such as the currently effective advisory and ad-
            ministrative fees for the Funds.
               Quotations of yield for a Fund or class will be based on the
            investment income per share (as defined by the Securities and Ex-
            change Commission) during a particular 30-day (or one-month) pe-
            riod (including dividends and interest), less expenses accrued
            during the period ("net investment income"), and will be computed
            by dividing net investment income by the maximum public offering
            price per share on the last day of the period.
               The Funds may also provide current distribution information to
            their shareholders in shareholder reports or other shareholder
            communications, or in certain types of sales literature provided
            to prospective investors. Current distribution information for a
            particular class of a Fund will be based on distributions for a
            specified period (i.e., total dividends from net investment in-
            come), divided by the relevant class net asset value per share on
            the last day of the period and annualized. The rate of current
            distributions does not reflect deductions for unrealized losses
            from transactions in derivative instruments such as options and
            futures, which may reduce total return. Current distribution rates
            differ from standardized yield rates in that they represent what a
            class of a Fund has declared and paid to shareholders as of the
            end of a specified period rather than the Fund's actual net in-
            vestment income for that period.
               The Adviser and each Portfolio Manager may also report to
            shareholders or to the public in advertisements concerning its
            performance as adviser to clients other than the Funds, and on its
            comparative performance or standing in relation to other money
            managers. Such comparative information may be compiled or provided
            by independent ratings services or by news organizations. Any per-
            formance information, whether related to the Funds, the Adviser or
            the Portfolio Managers, should be considered in light of the
            Funds' investment objectives and policies, characteristics and
            quality of the Funds' portfolios, and the market conditions during
            the time period indicated, and should not be considered to be rep-
            resentative of what may be achieved in the future. 
               Investment results of the Funds will fluctuate over time, and
            any representation of the Funds' total return or yield for any
            prior period should not be considered as a representation of what
            an investor's total return or yield may be in any future period.
 
            How to Buy Shares
 
            Class A, Class B (except the Opportunity Fund) and Class C shares
            of each Fund of the Trust are continuously offered through the
            Trust's principal underwriter, PIMCO Funds Distributors LLC (the
            "Distributor"), and through other firms which have dealer agree-
            ments with the Distributor ("participating brokers") or which have
            agreed to act as introducing brokers for the Distributor ("intro-
            ducing brokers"). Except to the extent described under "Restric-
            tions on Sales of and Exchanges for Shares of the Opportunity
            Fund" below, the Opportunity Fund is closed to new investors. The
            Opportunity Fund does not offer Class B shares.
               There are two ways to purchase Class A, Class B or Class C
            shares: either 1) through your dealer or broker which has a dealer
            agreement with the Distributor; or 2) directly by mailing a PIMCO
            Funds account application (an "account application") with payment,
            as described below under the heading Direct Investment, to the
            Distributor (if no dealer is named in the account application, the
            Distributor may act as dealer).
               Each Fund (except the Opportunity Fund) currently offers and
            sells three classes of shares in this Prospectus (Class A, Class B
            and Class C). The Opportunity Fund does not offer Class B shares.
            Shares may be purchased at a price equal to their net asset value
            per share next determined after receipt of an order, plus a sales
            charge which, at the election of the purchaser, may be imposed ei-
            ther (i) at the time of the purchase in the case of Class A shares
            (the "initial sales charge alternative"), (ii) on a contingent de-
            ferred basis in the case of Class B shares (the "deferred sales
            charge alternative"), or (iii) by the deduction of an ongoing as-
            set based sales charge in the case of Class C shares (the

 
                                               November 1, 1998 Prospectus   39
<PAGE>
 
            "asset based sales charge alternative"). In certain circumstances,
            Class A and Class C shares are also subject to a CDSC. See "Alter-
            native Purchase Arrangements." Purchase payments for Class B and
            Class C shares are fully invested at the net asset value next de-
            termined after acceptance of the trade. Purchase payments for
            Class A shares, less the applicable sales charge, are invested at
            the net asset value next determined after acceptance of the trade.
               All purchase orders received by the Distributor prior to the
            close of regular trading (normally 4:00 p.m., Eastern time) on the
            New York Stock Exchange (the "Exchange"), on a regular business
            day, are processed at that day's offering price. However, orders
            received by the Distributor from dealers or brokers after the of-
            fering price is determined that day will receive such offering
            price if the orders were received by the dealer or broker from its
            customer prior to such determination and were transmitted to and
            received by the Distributor prior to its close of business that
            day (normally 5:00 p.m., Eastern time) or, in the case of certain
            retirement plans, received by the Distributor prior to 9:30 a.m.,
            Eastern time on the next business day. Purchase orders received on
            other than a regular business day will be executed on the next
            succeeding regular business day. The Distributor, in its sole dis-
            cretion, may accept or reject any order for purchase of Fund
            shares. The sale of shares will be suspended during any period in
            which the Exchange is closed for other than weekends or holidays,
            or if permitted by the rules of the Securities and Exchange Com-
            mission, when trading on the Exchange is restricted or during an
            emergency which makes it impracticable for the Funds to dispose of
            their securities or to determine fairly the value of their net as-
            sets, or during any other period as permitted by the Securities
            and Exchange Commission for the protection of investors.
               Except for purchases through the PIMCO Funds Auto-Invest plan,
            the PIMCO Funds Auto-Exchange plan, investments pursuant to the
            Uniform Gifts to Minors Act, and tax-qualified and wrap programs
            referred to below under "Tax-Qualified Retirement Plans" and
            "Sales at Net Asset Value," the minimum initial investment in
            Class A, Class B or Class C shares of any Fund of the Trust or any
            series of PIMCO Funds: Pacific Investment Management Series is
            $2,500, and the minimum additional investment is $100 per Fund.
            For information about dealer commissions, see "Alternative Pur-
            chase Arrangements" below. Persons selling Fund shares may receive
            different compensation for selling Class A, Class B or Class C
            shares. Normally, Fund shares purchased through participating bro-
            kers are held in the investor's account with that broker. No share
            certificates will be issued unless specifically requested in writ-
            ing by an investor or broker-dealer.
 
DIRECT      Investors who wish to invest in Class A, Class B or Class C shares
INVESTMENT  of the Trust directly, rather than through a participating broker,
            may do so by opening an account with the Distributor. To open an
            account, an investor should complete the account application. All
            shareholders who open direct accounts with the Distributor will
            receive from the Distributor individual confirmations of each pur-
            chase, redemption, dividend reinvestment, exchange or transfer of
            Trust shares, including the total number of Trust shares owned as
            of the confirmation date, except that purchases which result from
            the reinvestment of daily-accrued dividends and/or distributions
            will be confirmed once each calendar quarter. See "Distributions"
            below. Information regarding direct investment or any other fea-
            tures or plans offered by the Trust may be obtained by calling the
            Distributor at 1-800-426-0107 or by calling your broker. 
 
PURCHASE BY Investors who wish to invest directly may send a check payable to
MAIL        PIMCO Funds Distributors LLC, along with a completed application
            form to:
 
               PIMCO Funds Distributors LLC
               P.O. Box 5866
               Denver, CO 80217-5866
 
               Purchases are accepted subject to collection of checks at full
            value and conversion into federal funds. Payment by a check drawn
            on any member of the Federal Reserve System can normally be con-
            verted into federal funds within two business days after receipt
            of the check. Checks drawn on a non-member bank may take up to 15
            days to convert
 

40   PIMCO Funds: Multi-Manager Series

<PAGE>
 
            into federal funds. In all cases, the purchase price is based on
            the net asset value next determined after the purchase order and
            check are accepted, even though the check may not yet have been
            converted into federal funds.
 
SUBSEQUENT  Subsequent purchases of Class A, Class B or Class C shares can be
PURCHASES   made as indicated above by mailing a check with a letter describ-
OF SHARES   ing the investment or with the additional investment portion of a
            confirmation statement. Except for subsequent purchases through
            the PIMCO Funds Auto-Invest plan, the PIMCO Funds Auto-Exchange
            plan, tax-qualified programs and PIMCO Funds Fund Link referred to
            below, and except during periods when an Automatic Withdrawal Plan
            is in effect, the minimum subsequent purchase is $100 in any Fund.
            All payments should be made payable to PIMCO Funds Distributors
            LLC and should clearly indicate the shareholder's account number.
            Checks should be mailed to the address above under "Purchase by
            Mail."

TAX-        The Distributor makes available retirement plan services and docu-
QUALIFIED   ments for Individual Retirement Accounts (IRAs), including Roth
RETIREMENT  IRAs, for which First National Bank of Boston (see "Change in
PLANS       Transfer Agent" below) serves as trustee and for IRA Accounts es-
            tablished with Form 5305-SIMPLE under the Internal Revenue Code of
            1986, as amended (the "Code"). These accounts include Simplified
            Employee Pension Plan (SEP) and Salary Reduction Simplified Em-
            ployee Pension Plan (SAR/SEP) IRA accounts and prototype docu-
            ments. In addition, prototype documents are available for estab-
            lishing 403(b)(7) custodial accounts with First National Bank of
            Boston as custodian. This type of plan is available to employees
            of certain non-profit organizations. 
               The Distributor also makes available prototype documents for
            establishing Money Purchase and/or Profit Sharing Plans and 401(k)
            Retirement Savings Plans. These prototype plans require certain
            minimum per participant account sizes and certain minimum aggre-
            gate investments in the Trust, but are not subject to the small
            account fees described below that will apply to other plans. In-
            vestors should call the Distributor at 1-800-426-0107 for further
            information about these plans and should consult with their own
            tax advisers before establishing any retirement plan. Investors
            who maintain their accounts with participating brokers should con-
            sult their broker about similar types of accounts that may be of-
            fered through the broker. The minimum initial investment for all
            tax-qualified plans (except for employer-sponsored plans, SIMPLE
            IRAs, SEPs and SAR/SEPs) is $1,000 per Fund and the minimum subse-
            quent investment is $100. The minimum initial investment for em-
            ployer-sponsored plans, SIMPLE IRAs, SEPs and SAR/SEPs and the
            minimum subsequent investment per Fund for all such plans is 
            $50. 
 
PIMCO FUNDS The PIMCO Funds Auto-Invest plan provides for periodic investments
AUTO-INVEST into the shareholder's account with the Trust by means of auto-
            matic transfers of a designated amount from the shareholder's bank
            account. The minimum investment for eligibility in the PIMCO Funds
            Auto-Invest plan is $1,000 per Fund. Investments may be made
            monthly or quarterly, and may be in any amount subject to a mini-
            mum of $50 per month for each Fund in which shares are purchased
            through the plan. Further information regarding the PIMCO Funds
            Auto-Invest plan is available from the Distributor or participat-
            ing brokers. You may enroll by completing the appropriate section
            on the account application, or you may obtain an Auto-Invest ap-
            plication by calling the Distributor or your broker.

PIMCO FUNDS The PIMCO Funds Auto-Exchange plan establishes regular, periodic
AUTO-       exchanges from one Fund to another Fund or to another series of
EXCHANGE    the Trust or PIMCO Funds: Pacific Investment Management Series
            which offers Class A, Class B or Class C shares. The plan provides
            for regular investments into a shareholder's account in a specific
            Fund by means of automatic exchanges of a designated amount from
            another Fund account of the same class of shares and with identi-
            cal account registration. Exchanges for shares of the Opportunity
            Fund are currently restricted to the extent provided under "Re-
            strictions on Sales of and Exchanges for Shares of the Opportunity
            Fund" below. 
               Exchanges may be made monthly or quarterly, and may be in any
            amount subject to a minimum of $1,000 to open a new Fund account
            and of $50 for any existing Fund account for which shares are pur-
            chased through the plan. 
 

                                                November 1, 1998 Prospectus   41
<PAGE>
 
            Further information regarding the PIMCO Funds Auto-Exchange plan
            is available from the Distributor at 1-800-426-0107 or participat-
            ing brokers. You may enroll by completing an application which may
            be obtained from the Distributor or by telephone request at 1-800-
            426-0107. For more information on exchanges, see "Exchange Privi-
            lege." 

PIMCO FUNDS PIMCO Funds Fund Link ("Fund Link") connects your Fund account
FUND LINK   with a bank account. Fund Link may be used for subsequent pur-
            chases and for redemptions and other transactions described under
            "How to Redeem." Purchase transactions are effected by electronic
            funds transfers from the shareholder's account at a U.S. bank or
            other financial institution that is an Automated Clearing House
            ("ACH") member. Investors may use Fund Link to make subsequent
            purchases of shares in amounts from $50 to $10,000. To initiate
            such purchases, call 1-800-426-0107. All such calls will be re-
            corded. Fund Link is normally established within 45 days of re-
            ceipt of a Fund Link application by Shareholder Services, Inc.
            (the "Transfer Agent"). The minimum investment by Fund Link is $50
            per Fund. Shares will be purchased on the regular business day the
            Distributor receives the funds through the ACH system, provided
            the funds are received before the close of regular trading on the
            Exchange. If the funds are received after the close of regular
            trading, the shares will be purchased on the next regular business
            day. 
               Fund Link privileges must be requested on the account applica-
            tion. To establish Fund Link on an existing account, complete a
            Fund Link application, which is available from the Distributor or
            your broker, with signatures guaranteed from all shareholders of
            record for the account. See "Signature Guarantee" below. Such
            privileges apply to each shareholder of record for the account un-
            less and until the Distributor receives written instructions from
            a shareholder of record canceling such privileges. Changes of bank
            account information must be made by completing a new Fund Link ap-
            plication signed by all owners of record of the account, with all
            signatures guaranteed. The Distributor, the Transfer Agent and the
            Fund may rely on any telephone instructions believed to be genuine
            and will not be responsible to shareholders for any damage, loss
            or expenses arising out of such instructions. The Fund reserves
            the right to amend, suspend or discontinue Fund Link privileges at
            any time without prior notice. Fund Link does not apply to shares
            held in broker "street name" accounts.

            RESTRICTIONS ON SALES OF AND EXCHANGES FOR SHARES OF THE OPPORTU-
            NITY FUND Shares of the Opportunity Fund are normally not avail-
            able for purchase by new investors in the Fund. However, in 1997,
            the Opportunity Fund began offering Class A and Class C shares to
            new investors (the "Offering") on a limited basis. With the excep-
            tion of certain benefit plans not currently eligible to acquire
            Opportunity Fund shares, all investors eligible to purchase shares
            of other Funds may participate in the Offering. Existing Class A
            shareholders and Class C shareholders of other series of the Trust
            or series of PIMCO Funds: Pacific Investment Management Series may
            purchase shares or acquire Opportunity Fund shares during the Of-
            fering by exchanging their Class A or Class C shares for the same
            class of Opportunity Fund shares in the manner described under
            "Exchange Privilege" below. The Offering will continue in effect
            until it is modified or terminated at the sole discretion of the
            Trust. Upon termination of the Offering, the Opportunity Fund will
            again be closed to new investors. For additional information re-
            garding the terms of the Offering, please contact the Distributor
            (at 1-800-426-0107) or your broker.
               Except to the extent described above, shares of the Opportunity
            Fund are not available for purchase by new investors in the Fund.
            The following categories of existing shareholders will still be
            permitted to purchase additional shares of the Fund upon termina-
            tion of the Offering: (i) shareholders who owned shares of the Op-
            portunity Fund on December 31, 1992 will be permitted to purchase
            additional shares of the Fund for as long as they continue to own
            shares of the Fund; (ii) participants in any self-directed quali-
            fied benefit plan (for example, 401(k) plans, 403(b) custodial ac-
            counts and Keogh plans, but not IRAs or SEP IRAs) that owned Op-
            portunity Fund shares on March 1, 1993 for any single plan partic-
            ipant will be eligible to direct the purchase of the Fund's shares
            by their plan account for so long as the plan continues to own
            shares of the Fund for any single plan participant; and (iii)
            shareholders who acquired shares during the Offering will be per-
            mitted to purchase additional shares of the Fund for as long as
            they 
 

42   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            continue to own shares of the Fund. Upon termination of the Offer-
            ing, in the event a shareholder redeems all of his or her shares
            of the Opportunity Fund, or all participants in a self-directed
            qualified benefit plan described above redeem their shares of the
            Opportunity Fund, such shareholder, or the participants in such
            plan, will no longer be eligible to purchase shares of the Oppor-
            tunity Fund. The Opportunity Fund does not offer Class B shares to
            new or existing investors.
               Except pursuant to the Offering, shareholders of other Funds
            are not permitted to exchange any of their shares for Opportunity
            Fund shares unless the shareholders are independently eligible to
            purchase Opportunity Fund shares because they already owned such
            shares of the Fund on December 31, 1992 (March 1, 1993, in the
            case of the self-directed qualified benefit plans described above)
            or acquired such shares during the Offering.
               The Trust reserves the right at any time to modify these re-
            strictions, including the suspension of all sales of Opportunity
            Fund shares or the lifting of restrictions on different classes of
            investors and/or transactions.
 
SIGNATURE   When a signature guarantee is called for, the shareholder should
GUARANTEE   have "Signature Guaranteed" stamped under his signature and guar-
            anteed by any of the following entities: U.S. banks, foreign banks
            having a U.S. correspondent bank, credit unions, savings associa-
            tions, U.S. registered dealers and brokers, municipal securities
            dealers and brokers, government securities dealers and brokers,
            national securities exchanges, registered securities associations
            and clearing agencies (each an "Eligible Guarantor Institution").
            The Distributor reserves the right to reject any signature guaran-
            tee pursuant to its written signature guarantee standards or pro-
            cedures, which may be revised in the future to permit it to reject
            signature guarantees from Eligible Guarantor Institutions that do
            not, based on credit guidelines, satisfy such written standards or
            procedures. The Trust may change the signature guarantee require-
            ments from time to time upon notice to shareholders, which may be
            given by means of a new or supplemented Prospectus.
 
ACCOUNT     Changes in registration or account privileges may be made in writ-
REGISTRATIONing to the Transfer Agent. Signature guarantees may be required.
CHANGES     See "Signature Guarantee" above. All correspondence must include
            the account number and must be sent to:
 
               PIMCO Funds Distributors LLC
               P.O. Box 5866
               Denver, CO 80217-5866

SMALL       Because of the disproportionately high costs of servicing accounts
ACCOUNT FEE with low balances, a fee at an annual rate of $16, paid to PIMCO
            Advisors, the Funds' administrator, will automatically be deducted
            from direct accounts with balances falling below a minimum level.
            The valuation of accounts and the deduction are expected to take
            place during the last five business days of each calendar quarter.
            The fee will be deducted in quarterly installments from accounts
            with balances below $2,500 except for Uniform Gift to Minors, IRA,
            Roth IRA and Auto-Invest accounts, for which the limit is $1,000.
            Effective April 1, 1999, except for prototype plans described
            above, the fee will apply to employer-sponsored retirement plan
            accounts, Money Purchase and/or Profit Sharing plans, 401(k)
            plans, 403(b)(7) custodial accounts, SIMPLE IRAs, SEPs and
            SAR/SEPs. (A separate custodial fee may apply to IRAs, Roth IRAs
            and other retirement accounts.) No fee will be charged on any ac-
            count of a shareholder if the aggregate value of all of the share-
            holder's accounts is at least $50,000. No small account fee will
            be charged to employee and employee-related accounts of PIMCO Ad-
            visors and/or its affiliates. 
 
MINIMUM     Due to the relatively high cost to the Funds of maintaining small
ACCOUNT     accounts, you are asked to maintain an account balance of at least
SIZE        the amount necessary to open the type of account involved. If your
            balance is below such minimum for three months or longer, the
            Funds' administrator shall have the right (except in the case of
            employer-sponsored retirement accounts) to close your account af-
            ter giving you 60 days in which to increase your balance. Your ac-
            count
 
                                                November 1, 1998 Prospectus   43
<PAGE>
 

            will not be liquidated if the reduction in size is due solely to
            market decline in the value of your Fund shares or if the aggre-
            gate value of all your accounts in PIMCO Funds exceeds $50,000.

CHANGE IN   The Trust expects to change its transfer agent for its Class A, B
TRANSFER    and C shares to First Data Investor Services Group, Inc. Share-
AGENT       holders will continue to receive all of the services described in
            this Prospectus and should continue to follow the various proce-
            dures set forth in this Prospectus, with the exception of the ad-
            dress changes described below. 
               There will be no changes in the toll-free 1-800 telephone num-
            bers set forth in this Prospectus. However, mailing addresses will
            change as follows: 
 
          Old Address               New Address
          -----------               -----------
          Shareholder Services,
           Inc.                     First Data Investor Services Group, Inc.
          P.O. Box 5866             P.O. Box 9688
          Denver, CO 80217          Providence, RI 02940-0926

          PIMCO Funds Distributors
           LLC                      PIMCO Funds Distributors LLC
          P.O. Box 5866             P.O. Box 9688
          Denver, CO 80217-5866     Providence, RI 02940-0926

               Also, at the time of the change of Transfer Agent, the
            custodian/trustee for the PIMCO Funds prototype retirement plans,
            403(b) custodial accounts, IRAs, Roth IRAs, SIMPLE IRAs, SEPs and
            SAR/SEPs will be changed from First National Bank of Boston to
            Boston Safe Deposit & Trust Company. 
 
            Alternative Purchase Arrangements
 
            The Trust offers investors three classes of shares in this Pro-
            spectus (Class A, Class B and Class C) which bear sales charges in
            different forms and amounts and which bear different levels of ex-
            penses. Through separate prospectuses, certain of the Funds cur-
            rently offer up to three additional classes of shares, Class D,
            Institutional Class and Administrative Class shares. Class D
            shares are offered through financial intermediaries. Institutional
            Class and Administrative Class shares are offered to pension and
            profit sharing plans, employee benefit trusts, endowments, founda-
            tions, corporations and other high net worth individuals. Class D,
            Institutional Class and Administrative Class shares are sold with-
            out a sales charge and have different expenses than Class A, Class
            B and Class C shares. As a result of lower sales charges and/or
            operating expenses, Class D, Institutional Class and Administra-
            tive Class shares are generally expected to achieve higher invest-
            ment returns than Class A, Class B or Class C shares. To obtain
            more information about the other classes of shares, please call
            the Distributor at 1-800-927-4648 (for Institutional and Adminis-
            trative Classes) or 1-888-87-PIMCO (for Class D). 
               The alternative purchase arrangements offered in this Prospec-
            tus are designed to enable a retail investor to choose the method
            of purchasing Fund shares that is most beneficial to the investor
            based on all factors to be considered, which include: the amount
            and intended length of the investment; the particular Fund; and
            whether the investor intends to exchange shares for shares of
            other Funds. Generally, when making an investment decision, in-
            vestors should consider the anticipated life of an intended in-
            vestment in the Funds, the accumulated distribution and servicing
            fees plus CDSCs on Class B or Class C shares, the initial sales
            charge plus accumulated servicing fees on Class A shares (plus a
            CDSC in certain circumstances), the possibility that the antici-
            pated higher return on Class A shares due to the lower ongoing
            charges will offset the initial sales charge paid on such shares,
            the automatic conversion of Class B shares to Class A shares and
            the difference in the CDSCs applicable to Class A, Class B and
            Class C shares.
 
            CLASS A The initial sales charge alternative (Class A) might be
            preferred by investors purchasing shares of sufficient aggregate
            value to qualify for reductions in the initial sales charge appli-
            cable to such shares. Similar reductions are not available on the
            contingent deferred sales charge alternative (Class B) or the as-
            set based sales charge alternative

 
44   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            (Class C). Class A shares are subject to a servicing fee but are
            not subject to a distribution fee and, accordingly, such shares
            are expected to pay correspondingly higher dividends on a per
            share basis. However, because initial sales charges are deducted
            at the time of purchase, not all of the purchase payment for Class
            A shares is invested initially. Class B and Class C shares might
            be preferable to investors who wish to have all purchase payments
            invested initially, although remaining subject to higher distribu-
            tion and servicing fees and, for certain periods, being subject to
            a CDSC. An investor who qualifies for an elimination of the Class
            A initial sales charge should also consider whether he or she an-
            ticipates redeeming shares in a time period which will subject
            such shares to a CDSC as described below. See "Initial Sales
            Charge Alternative--Class A Shares--Class A Deferred Sales Charge"
            below.
 
            CLASS B Class B shares might be preferred by investors who intend
            to invest in the Funds for longer periods and who do not intend to
            purchase shares of sufficient aggregate value to qualify for sales
            charge reductions applicable to Class A shares. Both Class B and
            Class C shares can be purchased at net asset value without an ini-
            tial sales charge. However, unlike Class C shares, Class B shares
            convert into Class A shares after the shares have been held for
            seven years. After the conversion takes place, the shares will no
            longer be subject to a CDSC, and will be subject to the servicing
            fees charged for Class A shares which are lower than the distribu-
            tion and servicing fees charged on either Class B or Class C
            shares. See "Deferred Sales Charge Alternative--Class B Shares"
            below. Class B shares are not available for purchase by employer
            sponsored retirement plans. The Opportunity Fund does not offer
            Class B shares.
 
            CLASS C Class C shares might be preferred by investors who intend
            to purchase shares which are not of sufficient aggregate value to
            qualify for Class A sales charges of 1% or less and who wish to
            have all purchase payments invested initially. Class C shares are
            preferable to Class B shares for investors who intend to maintain
            their investment for intermediate periods and therefore may also
            be preferable for investors who are unsure of the intended length
            of their investment. Unlike Class B shares, Class C shares are not
            subject to a CDSC after they have been held for one year and are
            subject to only a 1% CDSC during the first year. However, because
            Class C shares do not convert into Class A shares, Class B shares
            are preferable to Class C shares for investors who intend to main-
            tain their investment in the Funds for long periods. See "Asset
            Based Sales Charge Alternative--Class C Shares" below.
               In determining which class of shares to purchase, an investor
            should always consider whether any waiver or reduction of a sales
            charge or a CDSC is available. See generally "Initial Sales Charge
            Alternative--Class A Shares" and "Waiver of Contingent Deferred
            Sales Charges" below.
               The maximum single purchase of Class B shares of the Trust and
            series of PIMCO Funds: Pacific Investment Management Series ac-
            cepted is $249,999. The maximum single purchase of Class C shares
            of the Trust and series of PIMCO Funds: Pacific Investment Manage-
            ment Series accepted is $999,999. The Funds may refuse any order
            to purchase shares.
               For a description of the Distribution and Servicing Plans and
            distribution and servicing fees payable thereunder with respect to
            Class A, Class B and Class C shares, see "Distributor and Distri-
            bution and Servicing Plans" below.
 
            WAIVER OF CONTINGENT DEFERRED SALES CHARGES The CDSC applicable to
            Class A and Class C shares is currently waived for (i) any partial
            or complete redemption in connection with (a) required minimum
            distributions to IRA account owners or beneficiaries who are age
            70 1/2 or older or (b) distributions to participants in employer-
            sponsored retirement plans upon attaining age 59 1/2 or on account
            of death or disability;* (ii) any partial or complete redemption
            in
            ------
            * This subsection (i) shall read as follows until December 31,
              1998: "(i) any partial or complete redemption in connection with
              any of the following distributions from a retirement plan,
              including a 403(b)(7) custodial account or an IRA (with the
              exception of a Roth IRA), that qualify for exemption from the
              additional tax on early distributions under Section 72(t) of the
              Code: (a) upon attaining age 59 1/2, (b) on account of death or
              disability, (c) as part of a series of substantially equal
              periodic payments, (d) in the case of an IRA (with the exception
              of a Roth IRA), attributable to qualified higher education
              expenses or to qualified first-time home-buyer expenses or (e)
              in the case of a retirement plan other than an IRA, upon
              separation from service after attaining age 55;"
 

                                                November 1, 1998 Prospectus   45
<PAGE>
 
            connection with a qualifying loan or hardship withdrawal from an
            employer sponsored retirement plan; (iii) any complete redemption
            in connection with a distribution from a qualified employer re-
            tirement plan in connection with termination of employment or ter-
            mination of the employer's plan and the transfer to another em-
            ployer's plan or to an IRA (with the exception of a Roth IRA);
            (iv) any partial or complete redemption following death or dis-
            ability (as defined in the Code) of a shareholder (including one
            who owns the shares as joint tenant with his or her spouse) from
            an account in which the deceased or disabled is named, provided
            the redemption is requested within one year of the death or ini-
            tial determination of disability; (v) any redemption resulting
            from a return of an excess contribution to a qualified employer
            retirement plan or an IRA (with the exception of a Roth IRA); (vi)
            up to 10% per year of the value of an account which (a) has the
            value of at least $10,000 at the start of such year and (b) is
            subject to an Automatic Withdrawal Plan; (vii) redemptions by
            Trustees, officers and employees of the Trust, and by directors,
            officers and employees of the Distributor and the Adviser; (viii)
            redemptions effected pursuant to a Fund's right to involuntarily
            redeem a shareholder's account if the aggregate net asset value of
            shares held in such shareholder's account is less than a minimum
            account size specified in such Fund's prospectus; (ix) involuntary
            redemptions caused by operation of law; (x) redemption of shares
            of any Fund that is combined with another Fund, investment compa-
            ny, or personal holding company by virtue of a merger, acquisition
            or other similar reorganization transaction; (xi) redemptions by a
            shareholder who is a participant making periodic purchases of not
            less than $50 through certain employer sponsored savings plans
            that are clients of a broker-dealer with which the Distributor has
            an agreement with respect to such purchases; (xii) redemptions ef-
            fected by trustees or other fiduciaries who have purchased shares
            for employer sponsored plans, the trustee, administrator, fiducia-
            ry, broker, trust company or registered investment adviser for
            which has an agreement with the Distributor with respect to such
            purchases; or (xiii) redemptions in connection with IRA accounts
            established with Form 5305-SIMPLE under the Code for which the
            Trust is the designated financial institution.
               The CDSC applicable to Class B shares is currently waived for
            any partial or complete redemption in each of the following cases:
            (a) in connection with required minimum distributions to IRA ac-
            count owners or to plan participants or beneficiaries who are age
            70 1/2 or older; (b) following death or disability (as defined in
            the Code) of a shareholder (including one who owns the shares as
            joint tenant with his or her spouse) from an account in which the
            deceased or disabled is named, provided the redemption is re-
            quested within one year of the death or initial determination of
            disability; and (c) up to 10% per year of the value of an account
            which (i) has a value of at least $100,000 at the start of such
            year and (ii) is subject to an Automatic Withdrawal Plan. See "How
            to Redeem--Automatic Withdrawal Plan."
               The Distributor may require documentation prior to waiver of
            the CDSC for any class, including distribution letters, certifica-
            tion by plan administrators, applicable tax forms, death certifi-
            cates, physicians' certificates, etc.
 

46   PIMCO Funds: Multi-Manager Series
<PAGE>
 

 
INITIAL
SALES
CHARGE
ALTERNATIVE --
CLASS A
SHARES
            Class A shares are sold at a public offering price equal to their
            net asset value per share plus a sales charge, as set forth below.
            As indicated below under "Class A Deferred Sales Charge," certain
            investors that purchase $1,000,000 or more of any Fund's Class A
            shares (and thus pay no initial sales charge) may be subject to a
            1% CDSC if they redeem such shares during the first 18 months af-
            ter their purchase.
 
 
              ALL FUNDS
 
<TABLE>
<CAPTION>
                                                               DISCOUNT OR
                                SALES CHARGE AS SALES CHARGE   COMMISSION TO
           AMOUNT OF            % OF NET        AS % OF PUBLIC DEALERS AS % OF
           PURCHASE             AMOUNT INVESTED OFFERING PRICE PUBLIC OFFERING PRICE
           -------------------------------------------------------------------------
           <S>                  <C>             <C>            <C>
           $0 - $49,999         5.82%           5.50%          4.75%
           -------------------------------------------------------------------------
           $50,000 - $99,999    4.71%           4.50%          4.00%
           -------------------------------------------------------------------------
           $100,000 - $249,999  3.63%           3.50%          3.00%
           -------------------------------------------------------------------------
           $250,000 - $499,999  2.56%           2.50%          2.00%
           -------------------------------------------------------------------------
           $500,000 - $999,999  2.04%           2.00%          1.75%
           -------------------------------------------------------------------------
           $1,000,000+          0.00%(/1/)      0.00%(/1/)     0.75%(/2/)
</TABLE>
            1. As shown, investors that purchase more than $1,000,000 of any
            Fund's Class A shares will not pay any initial sales charge on
            such purchase. However, purchasers of $1,000,000 or more of Class
            A shares (other than those purchasers described below under "Sales
            at Net Asset Value" where no commission is paid) will be subject
            to a CDSC of 1% if such shares are redeemed during the first 18
            months after such shares are purchased unless such purchaser is
            eligible for a waiver of the CDSC as described under "Waiver of
            Contingent Deferred Sales Charges" above. See "Class A Deferred
            Sales Charge" below.
 
            2. The Distributor will pay a commission to dealers who sell
            amounts of $1,000,000 or more of Class A shares (or who sell Class
            A shares at net asset value to certain employer-sponsored plans as
            outlined in "Sales at Net Asset Value" below) of each Fund accord-
            ing to the following schedule: 0.75% of the first $2,000,000,
            0.50% of amounts from $2,000,001 to $5,000,000, and 0.25% of
            amounts over $5,000,000.
 
               Each Fund receives the entire net asset value of its Class A
            shares purchased by investors. The Distributor receives the sales
            charge shown above less any applicable discount or commission
            "reallowed" to participating brokers in the amounts indicated in
            the table above. The Distributor may, however, elect to reallow
            the entire sales charge to participating brokers for all sales
            with respect to which orders are placed with the Distributor for
            any particular Fund during a particular period. During such peri-
            ods as may from time to time be designated by the Distributor, the
            Distributor will pay an additional amount of up to 0.50% of the
            purchase price on sales of Class A shares of all or selected Funds
            purchased to each participating broker which obtains purchase or-
            ders in amounts exceeding thresholds established from time to time
            by the Distributor. From time to time, the Distributor, its parent
            and/or its affiliates may make additional payments to one or more
            participating brokers based upon factors such as the level of
            sales or the length of time clients' assets have remained in the
            Trust.
               Shares issued pursuant to the automatic reinvestment of income
            dividends or capital gains distributions are issued at net asset
            value and are not subject to any sales charges.
               Under the circumstances described below, investors may be enti-
            tled to pay reduced sales charges for Class A shares.
 
            COMBINED PURCHASE PRIVILEGE Investors may qualify for a reduced
            sales charge by combining purchases of the Class A shares of one
            or more Funds or other series of the Trust or of PIMCO Funds: Pa-
            cific Investment Management Series which offer Class A shares (to-
            gether, "eligible PIMCO Funds") into a "single purchase," if the
            resulting purchase totals at least $50,000. The term single pur-
            chase refers to:
                (i) a single purchase by an individual, or concurrent pur-
                    chases, which in the aggregate are at least equal to the
                    prescribed amounts, by an individual, his or her spouse
                    and their children under the age of 21 years purchasing
                    Class A shares of the eligible PIMCO Funds for his, her or
                    their own account;
 

                                                November 1, 1998 Prospectus   47
<PAGE>
 

               (ii) a single purchase by a trustee or other fiduciary purchas-
                    ing shares for a single trust, estate or fiduciary account
                    although more than one beneficiary is involved; or
               (iii) a single purchase for the employee benefit plans of a
                     single employer.
               For further information, call the Distributor at 1-800-426-0107
               or your broker.
 
            CUMULATIVE QUANTITY DISCOUNT (RIGHT OF ACCUMULATION) A purchase of
            additional Class A shares of any eligible PIMCO Fund may qualify
            for a Cumulative Quantity Discount at the rate applicable to the
            discount bracket obtained by adding:
               (i) the investor's current purchase;
               (ii) the value (at the close of business on the day of the cur-
                    rent purchase) of all Class A shares of any eligible PIMCO
                    Fund held by the investor computed at the maximum offering
                    price; and
               (iii) the value of all shares described in paragraph (ii) owned
                     by another shareholder eligible to be combined with the
                     investor's purchase into a "single purchase" as defined
                     above under "Combined Purchase Privilege."
               For example, if you owned Class A shares of the Equity Income
            Fund worth $25,000 at the current maximum offering price and
            wished to purchase Class A shares of the Growth Fund worth an ad-
            ditional $30,000, the sales charge for the $30,000 purchase would
            be at the 4.50% rate applicable to a single $55,000 purchase of
            shares of the Growth Fund, rather than the 5.50% rate.
 
            LETTER OF INTENT An investor may also obtain a reduced sales
            charge by means of a written Letter of Intent, which expresses an
            intention to invest not less than $50,000 within a period of 13
            months in Class A shares of any eligible PIMCO Fund(s). Each pur-
            chase of shares under a Letter of Intent will be made at the pub-
            lic offering price or prices applicable at the time of such pur-
            chase to a single transaction of the dollar amount indicated in
            the Letter. At the investor's option, a Letter of Intent may in-
            clude purchases of Class A shares of any eligible PIMCO Fund made
            not more than 90 days prior to the date the Letter of Intent is
            signed; however, the 13-month period during which the Letter is in
            effect will begin on the date of the earliest purchase to be in-
            cluded and the sales charge on any purchases prior to the Letter
            will not be adjusted.
               Investors qualifying for the Combined Purchase Privilege de-
            scribed above may purchase shares of the eligible PIMCO Funds un-
            der a single Letter of Intent. For example, if at the time you
            sign a Letter of Intent to invest at least $100,000 in Class A
            shares of any Fund, you and your spouse each purchase Class A
            shares of the Growth Fund worth $30,000 (for a total of $60,000),
            it will only be necessary to invest a total of $40,000 during the
            following 13 months in Class A shares of any of the Funds to qual-
            ify for the 3.50% sales charge on the total amount being invested
            (the sales charge applicable to an investment of $100,000 in any
            of the Funds).
               A Letter of Intent is not a binding obligation to purchase the
            full amount indicated. The minimum initial investment under a Let-
            ter of Intent is 5% of such amount. Shares purchased with the
            first 5% of such amount will be held in escrow (while remaining
            registered in your name) to secure payment of the higher sales
            charge applicable to the shares actually purchased in the event
            the full intended amount is not purchased. If the full amount in-
            dicated is not purchased, a sufficient amount of such escrowed
            shares will be involuntarily redeemed to pay the additional sales
            charge applicable to the amount actually purchased, if necessary.
            Dividends on escrowed shares, whether paid in cash or reinvested
            in additional eligible PIMCO Fund shares, are not subject to es-
            crow. When the full amount indicated has been purchased, the es-
            crow will be released.
               If you wish to enter into a Letter of Intent in conjunction
            with your initial investment in Class A shares of a Fund, you
            should complete the appropriate portion of the account applica-
            tion. If you are a current Class A shareholder desiring to do so
            you may obtain a form of Letter of Intent by contacting the Dis-
            tributor at 1-800-426-0107 or any broker participating in this
            program.
 

48   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            REINSTATEMENT PRIVILEGE A Class A shareholder who has caused any
            or all of his shares to be redeemed may reinvest all or any por-
            tion of the redemption proceeds in Class A shares of any eligible
            PIMCO Fund at net asset value without any sales charge, provided
            that such reinvestment is made within 120 calendar days after the
            redemption or repurchase date. Shares are sold to a reinvesting
            shareholder at the net asset value next determined. See "How Net
            Asset Value is Determined." A reinstatement pursuant to this priv-
            ilege will not cancel the redemption transaction and, consequent-
            ly, any gain or loss so realized may be recognized for federal tax
            purposes except that no loss may be recognized to the extent that
            the proceeds are reinvested in shares of the same Fund within 30
            days. The reinstatement privilege may be utilized by a shareholder
            only once, irrespective of the number of shares redeemed, except
            that the privilege may be utilized without limit in connection
            with transactions whose sole purpose is to transfer a sharehold-
            er's interest in a Fund to his Individual Retirement Account or
            other qualified retirement plan account. An investor may exercise
            the reinstatement privilege by written request sent to the Dis-
            tributor or to the investor's broker.
 
            SALES AT NET ASSET VALUE Each Fund may sell its Class A shares at
            net asset value without a sales charge to (a) current or retired
            officers, trustees, directors or employees of the Trust, the Ad-
            viser or the Distributor, a parent, brother or sister of any such
            officer, trustee, director or employee or a spouse or child of any
            of the foregoing persons, or any trust, profit sharing or pension
            plan for the benefit of any such person and to any other person if
            the Distributor anticipates that there will be minimal sales ex-
            penses associated with the sale, (b) current or retired trustees
            of PIMCO Funds: Pacific Investment Management Series, a registered
            investment company for which Pacific Investment Management, an af-
            filiate of the Adviser, acts as investment adviser, (c) current
            registered representatives and other full-time employees of par-
            ticipating brokers or such persons' spouses or for trust or custo-
            dial accounts for their minor children, (d) trustees or other fi-
            duciaries purchasing shares for certain plans sponsored by employ-
            ers, professional organizations or associations or charitable or-
            ganizations, the trustee, administrator, fiduciary, broker, trust
            company or registered investment adviser for which has an agree-
            ment with the Distributor with respect to such purchases (includ-
            ing provisions related to minimum levels of investment in the
            Trust), and to participants in such plans and their spouses pur-
            chasing for their account(s) or IRAs (with the exception of Roth
            IRAs), (e) participants investing through accounts known as "wrap
            accounts" established with brokers or dealers approved by the Dis-
            tributor where such brokers or dealers are paid a single, inclu-
            sive fee for brokerage and investment management services, (f)
            client accounts of broker-dealers or registered investment advis-
            ers affiliated with such broker-dealers with which the Distributor
            has an agreement for the use of PIMCO Funds: Multi-Manager Series
            in particular investment products or programs, and (g) accounts
            for which a trust company affiliated with the Trust or the Adviser
            serves as trustee or custodian. As described above, the Distribu-
            tor will not pay any initial commission to dealers upon the sale
            of Class A shares to the purchasers described in this paragraph
            except for sales to purchasers described under (d) in this para-
            graph.
 
            NOTIFICATION OF DISTRIBUTOR An investor or participating broker
            must notify the Distributor whenever a quantity discount or re-
            duced sales charge is applicable to a purchase and must provide
            the Distributor with sufficient information at the time of pur-
            chase to verify that each purchase qualifies for the privilege or
            discount. Upon such notification, the investor will receive the
            lowest applicable sales charge. The quantity discounts described
            above may be modified or terminated at any time.
 
            CLASS A DEFERRED SALES CHARGE For all Funds, investors who pur-
            chase $1,000,000 or more of Class A shares (and, thus, purchase
            such shares without any initial sales charge) may be subject to a
            1% CDSC (the "Class A CDSC") if such shares are redeemed within 18
            months of their purchase. The Class A CDSC does not apply to in-
            vestors purchasing $1,000,000 or more of any Fund's Class A shares
            if such investors are otherwise eligible to purchase Class A
            shares without any sales charge because they are described under
            "Sales at Net Asset Value" above.
 

                                                November 1, 1998 Prospectus   49
<PAGE>
 

               For purchases subject to the Class A CDSC, a 1% CDSC will apply
            for any redemption of such Class A shares that occurs within 18
            months of their purchase. No CDSC will be imposed if the shares
            redeemed have been acquired through the reinvestment of dividends
            or capital gains distributions or if the amount redeemed is de-
            rived from increases in the value of the account above the amount
            of purchase payments subject to the CDSC. In determining whether a
            CDSC is payable, it is assumed that Class A shares acquired
            through the reinvestment of dividends and distributions are re-
            deemed first, and thereafter that Class A shares that have been
            held by an investor for the longest period of time are redeemed
            first.
               The Class A CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For more
            information about the Class A CDSC, call the Distributor at 1-800-
            426-0107.
 
            PARTICIPATING BROKERS Investment dealers and other financial in-
            termediaries provide varying arrangements for their clients to
            purchase and redeem Fund shares. Some may establish higher minimum
            investment requirements than set forth above. Firms may arrange
            with their clients for other investment or administrative services
            and may independently establish and charge transaction fees and/or
            other additional amounts to their clients for such services, which
            charges would reduce clients' return. Firms also may hold Fund
            shares in nominee or street name as agent for and on behalf of
            their customers. In such instances, the Trust's transfer agent
            will have no information with respect to or control over accounts
            of specific shareholders. Such shareholders may obtain access to
            their accounts and information about their accounts only from
            their broker. In addition, certain privileges with respect to the
            purchase and redemption of shares or the reinvestment of dividends
            may not be available through such firms. Some firms may partici-
            pate in a program allowing them access to their clients' accounts
            for servicing including, without limitation, transfers of regis-
            tration and dividend payee changes; and may perform functions such
            as generation of confirmation statements and disbursement of cash
            dividends. This Prospectus should be read in connection with such
            firms' material regarding their fees and services.
 
            
            
            
            
            
            
DEFERRED    Class B shares are sold at their current net asset value without
SALES       any initial sales charge. The full amount of an investor's pur-
CHARGE      chase payment will be invested in shares of the Fund(s) selected.
ALTERNATIVE A CDSC will be imposed on Class B shares if an investor redeems an
- -- CLASS B  amount which causes the current value of the investor's account
SHARES      for a Fund to fall below the total dollar amount of purchase pay-
            ments subject to the CDSC, except that no CDSC is imposed if the
            shares redeemed have been acquired through the reinvestment of
            dividends or capital gains distributions or if the amount redeemed
            is derived from increases in the value of the account above the
            amount of purchase payments subject to the CDSC.
               Whether a CDSC is imposed and the amount of the CDSC will de-
            pend on the number of years since the investor made a purchase
            payment from which an amount is being redeemed. Purchases are sub-
            ject to the CDSC according to the following schedule:
 
 
<TABLE>
<CAPTION>
           YEAR SINCE PURCHASE   PERCENTAGE CONTINGENT
           PAYMENT WAS MADE      DEFERRED SALES CHARGE
           -------------------------------------------
           <S>                   <C>
           First                   5
           -------------------------------------------
           Second                  4
           -------------------------------------------
           Third                   3
           -------------------------------------------
           Fourth                  3
           -------------------------------------------
           Fifth                   2
           -------------------------------------------
           Sixth                   1
           -------------------------------------------
           Seventh                 0*
</TABLE>
 
            *After the seventh year, Class B shares convert into Class A
            shares as described below.
 

50   PIMCO Funds: Multi-Manager Series
<PAGE>
 

 
               In determining whether a CDSC is payable, it is assumed that
            the purchase payment from which a redemption is made is the earli-
            est purchase payment from which a redemption or exchange has not
            already been fully effected.
               The following example will illustrate the operation of the
            Class B CDSC:
               Assume that an individual opens an account and makes a purchase
            payment of $10,000 for Class B shares of a Fund and that six
            months later the value of the investor's account for that Fund has
            grown through investment performance and reinvestment of distribu-
            tions to $11,000. The investor then may redeem up to $1,000 from
            that Fund ($11,000 minus $10,000) without incurring a CDSC. If the
            investor should redeem $3,000, a CDSC would be imposed on $2,000
            of the redemption (the amount by which the investor's account for
            the Fund was reduced below the amount of the purchase payment). At
            the rate of 5%, the Class B CDSC would be $100.
               In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all Class
            B shares in the shareholder's account with the particular Fund are
            aggregated, and the current value of all such shares is aggregat-
            ed. Any CDSC imposed on a redemption of Class B shares is paid to
            the Distributor.
               Class B shares are subject to higher distribution fees than
            Class A shares for a fixed period after their purchase, after
            which they automatically convert to Class A shares and are no
            longer subject to such higher distribution fees. Class B shares of
            each Fund automatically convert into Class A shares after they
            have been held for seven years.
               For sales of Class B shares made and services rendered to Class
            B shareholders, the Distributor intends to make payments to par-
            ticipating brokers, at the time a shareholder purchases Class B
            shares, of 4.00% of the purchase amount for each of the Funds.
            During such periods as may from time to time be designated by the
            Distributor, the Distributor will pay selected participating bro-
            kers an additional amount of up to .50% of the purchase price on
            sales of Class B shares of all or selected Funds purchased to each
            participating broker which obtains purchase orders in amounts ex-
            ceeding thresholds established from time to time by the Distribu-
            tor.
               The Class B CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For
            more information about the Class B CDSC, call the Distributor at
            1-800-426-0107.
 
ASSET BASED
SALES
CHARGE
ALTERNATIVE --
CLASS C
SHARES
            Class C shares are sold at their current net asset value without
            any initial sales charge. A CDSC is imposed on Class C shares if
            an investor redeems an amount which causes the current value of
            the investor's account for a Fund to fall below the total dollar
            amount of purchase payments subject to the CDSC, except that no
            CDSC is imposed if the shares redeemed have been acquired through
            the reinvestment of dividends or capital gains distributions or if
            the amount redeemed is derived from increases in the value of the
            account above the amount of purchase payments subject to the CDSC.
            All of an investor's purchase payments are invested in shares of
            the Fund(s) selected.
               Whether a CDSC is imposed and the amount of the CDSC will de-
            pend on the number of years since the investor made a purchase
            payment from which an amount is being redeemed. Purchases are sub-
            ject to the CDSC according to the following schedule:
 
 
<TABLE>
<CAPTION>
           YEAR SINCE PURCHASE   PERCENTAGE CONTINGENT
           PAYMENT WAS MADE      DEFERRED SALES CHARGE
           -------------------------------------------
           <S>                   <C>
           First                   1
           -------------------------------------------
           Thereafter              0
</TABLE>
 
 
               In determining whether a CDSC is payable, it is assumed that
            the purchase payment from which the redemption is made is the ear-
            liest purchase payment (from which a redemption or exchange has
            not already been effected).
 

                                               November 1, 1998 Prospectus   51
<PAGE>
 

               The following example will illustrate the operation of the
            Class C CDSC:
               Assume that an individual opens an account and makes a purchase
            payment of $10,000 for Class C shares of a Fund and that six
            months later the value of the investor's account for that Fund has
            grown through investment performance and reinvestment of distribu-
            tions to $11,000. The investor then may redeem up to $1,000 from
            that Fund ($11,000 minus $10,000) without incurring a CDSC. If the
            investor should redeem $3,000, a CDSC would be imposed on $2,000
            of the redemption (the amount by which the investor's account for
            the Fund was reduced below the amount of the purchase payment). At
            the rate of 1%, the Class C CDSC would be $20.
               In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all Class
            C shares in the shareholder's account with the particular Fund are
            aggregated, and the current value of all such shares is aggregat-
            ed. Any CDSC imposed on a redemption of Class C shares is paid to
            the Distributor. Unlike Class B shares, Class C shares do not au-
            tomatically convert to any other class of shares of the Funds.
               Except as described below, for sales of Class C shares made and
            services rendered to Class C shareholders, the Distributor expects
            to make payments to participating brokers, at the time the share-
            holder purchases Class C shares, of 1.00% (representing .75% dis-
            tribution fees and .25% servicing fees) of the purchase amount for
            all Funds. For sales of Class C shares made to participants making
            periodic purchases of not less than $50 through certain employer
            sponsored savings plans which are clients of a broker-dealer with
            which the Distributor has an agreement with respect to such pur-
            chases, no payments are made at the time of purchase. During such
            periods as may from time to time be designated by the Distributor,
            the Distributor will pay an additional amount of up to .50% of the
            purchase price on sales of Class C shares of all or selected Funds
            purchased to each participating broker which obtains purchase or-
            ders in amounts exceeding thresholds established from time to time
            by the Distributor.
               The Class C CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For more
            information about the Class C CDSC, contact the Distributor at 1-
            800-426-0107.
 
            Exchange Privilege
 
            Except with respect to exchanges for shares of the Opportunity
            Fund (which are subject to certain restrictions) or other Funds
            for which sales are suspended to new investors, a shareholder may
            exchange Class A, Class B and Class C shares of any Fund for the
            same Class of shares of any other Fund in an account with identi-
            cal registration on the basis of their respective net asset val-
            ues. For information on restrictions applicable to exchanges of
            shares for shares of the Opportunity Fund, see "Restrictions on
            Sales of and Exchanges for Shares of the Opportunity Fund" under
            "How to Buy Shares" above. Class A, Class B and Class C shares of
            each Fund may also be exchanged for shares of the same class of
            another series of the Trust not offered in this Prospectus (in-
            cluding the PIMCO Funds Asset Allocation Series portfolios, which
            are so-called "funds-of-funds" portfolios offered by the Trust) or
            of a series of PIMCO Funds: Pacific Investment Management Series,
            an affiliated mutual fund family comprised primarily of fixed in-
            come portfolios managed by Pacific Investment Management, an af-
            filiate of the Adviser. There are currently no exchange fees or
            charges. Exchanges of shares outstanding on September 30, 1998 may
            be made in any amount through December 31, 1998 into any portfolio
            of PIMCO Funds Asset Allocation Series. All other exchanges, in-
            cluding exchanges from PIMCO Funds Asset Allocation Series portfo-
            lios into other series of the Trust or of PIMCO Funds: Pacific In-
            vestment Management Series, are subject to the $2,500 minimum ini-
            tial purchase requirement for each Fund, except with respect to
            tax-qualified programs and exchanges effected through the PIMCO
            Funds Auto-Exchange plan. An exchange will constitute a taxable
            sale for federal income tax purposes.
               Investors who maintain their account with the Distributor may
            exchange shares by a written exchange request sent to PIMCO Funds
            Distributors LLC, P.O. Box 5866, Denver, CO 80217-5866 or, unless
            the investor has specifically declined telephone exchange privi-
            leges on the account application or elected in writing not to uti-
            lize telephone exchanges, by a telephone request to the Transfer
            Agent at 1-800-426-0107. The Trust will employ reasonable proce-
 

52   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            dures to confirm that instructions communicated by telephone are
            genuine, and may be liable for any losses due to unauthorized or
            fraudulent instructions if it fails to employ such procedures. The
            Trust will require a form of personal identification prior to act-
            ing on a caller's telephone instructions, will provide written
            confirmations of such transactions and will record telephone in-
            structions. Exchange forms are available from the Distributor at
            1-800-426-0107 and may be used if there will be no change in the
            registered name or address of the shareholder. Changes in regis-
            tration information or account privileges may be made in writing
            to the Transfer Agent, Shareholder Services, Inc., P.O. Box 5866,
            Denver, Colorado 80217-5866, or by use of forms which are avail-
            able from the Distributor. A signature guarantee is required. See
            "How to Buy Shares--Signature Guarantee." Telephone exchanges may
            be made between 9:00 a.m., Eastern time and the close of regular
            trading (normally 4:00 p.m., Eastern time) on the Exchange on any
            day the Exchange is open (generally weekdays other than normal
            holidays). The Trust reserves the right to refuse exchange pur-
            chases if, in the judgment of the Adviser, the purchase would ad-
            versely affect the Fund and its shareholders. In particular, a
            pattern of exchanges characteristic of "market-timing" strategies
            may be deemed by the Adviser to be detrimental to the Trust or a
            particular Fund.
               Currently, the Trust limits the number of "round trip" ex-
            changes an investor may make. An investor makes a "round trip" ex-
            change when the investor purchases shares of a particular Fund,
            subsequently exchanges those shares for shares of a different
            Fund, and then exchanges back into the originally purchased Fund.
            The Trust has the right to refuse any exchange for any investor
            who completes (by making the exchange back into the shares of the
            originally purchased Fund) more than six round trip exchanges in
            any twelve-month period. Although the Trust has no current inten-
            tion of terminating or modifying the exchange privilege other than
            as set forth in the preceding sentence, it reserves the right to
            do so at any time. Except as otherwise permitted by Securities and
            Exchange Commission regulations, the Trust will give 60 days' ad-
            vance notice to shareholders of any termination or material modi-
            fication of the exchange privilege. For further information about
            exchange privileges, contact your participating broker or call the
            Transfer Agent at 1-800-426-0107.
               With respect to Class B and Class C shares, or Class A shares
            subject to a CDSC, if less than all of an investment is exchanged
            out of a Fund, any portion of the investment attributable to capi-
            tal appreciation and/or reinvested dividends or capital gains dis-
            tributions will be exchanged first, and thereafter any portions
            exchanged will be from the earliest investment made in the Fund
            from which the exchange was made. Shareholders should take into
            account the effect of any exchange on the applicability of any
            CDSC that may be imposed upon any subsequent redemption.
               Investors may also select the PIMCO Funds Auto-Exchange plan
            which establishes automatic periodic exchanges. For further infor-
            mation on automatic exchanges see "How to Buy Shares--PIMCO Funds
            Auto-Exchange" above.
 
            How to Redeem
 
            Class A, Class B or Class C shares may be redeemed through a par-
            ticipating broker, by telephone, by submitting a written redemp-
            tion request directly to the Transfer Agent (for non-broker ac-
            counts), or through an Automatic Withdrawal Plan or PIMCO Funds
            Fund Link. In the event a shareholder or participants in certain
            self-directed qualified employee benefit plans eligible to pur-
            chase shares of the Opportunity Fund redeem(s) all of the share-
            holder's or the participants' shares of the Fund (including shares
            acquired during the Offering described under "How to Buy Shares--
            Restrictions on Sales of and Exchanges for Shares of the Opportu-
            nity Fund" above), such shareholder or participants in such plans
            will no longer be eligible to purchase shares of the Opportunity
            Fund.
               A CDSC may apply to a redemption of Class A, Class B or Class C
            shares. See "Alternative Purchase Arrangements" above. Shares are
            redeemed at their net asset value next determined after a proper
            redemption request has been received, less any applicable CDSC.
            There is no charge by the Distributor (other than an applicable
            CDSC) with respect to a redemption; however, a participating bro-
            ker who processes a redemption for an investor may charge custom-
            ary commissions for its services. Dealers and other financial
            services firms are obligated to transmit orders

 
                                               November 1, 1998 Prospectus   53
<PAGE>
 
            promptly. Requests for redemption received by dealers or other
            firms prior to the close of regular trading (normally 4:00 p.m.,
            Eastern time) on the Exchange on a regular business day and re-
            ceived by the Distributor prior to the close of the Distributor's
            business day will be confirmed at the net asset value effective as
            of the closing of the Exchange on that day, less any applicable
            CDSC.
 
DIRECT      A shareholder's original account application permits the share-
REDEMPTION  holder to redeem by written request and by telephone (unless the
            shareholder specifically elects not to utilize telephone redemp-
            tions) and to elect one or more of the additional redemption pro-
            cedures described below. A shareholder may change the instructions
            indicated on his original account application, or may request ad-
            ditional redemption options, only by transmitting a written direc-
            tion to the Transfer Agent. Requests to institute or change any of
            the additional redemption procedures will require a signature
            guarantee.
               Redemption proceeds will normally be mailed to the redeeming
            shareholder within seven days or, in the case of wire transfer or
            Fund Link redemptions, sent to the designated bank account within
            one business day. Fund Link redemptions may be received by the
            bank on the second or third business day. In cases where shares
            have recently been purchased by personal check, redemption pro-
            ceeds may be withheld until the check has been collected, which
            may take up to 15 days. To avoid such withholding, investors
            should purchase shares by certified or bank check or by wire
            transfer.
 
WRITTEN     To redeem shares in writing (whether or not represented by certif-
REQUESTS    icates), a shareholder must send the following items to the Trans-
            fer Agent, Shareholder Services, Inc., P.O. Box 5866, Denver, Col-
            orado 80217-5866:
               (1) a written request for redemption signed by all registered
                   owners exactly as the account is registered on the Transfer
                   Agent's records, including fiduciary titles, if any, and
                   specifying the account number and the dollar amount or num-
                   ber of shares to be redeemed;
               (2) for certain redemptions described below, a guarantee of all
                   signatures on the written request or on the share certifi-
                   cate or accompanying stock power, if required, as described
                   under "How to Buy Shares--Signature Guarantee";
               (3) any share certificates issued for any of the shares to be
                   redeemed (see "Certificated Shares" below); and
               (4) any additional documents which may be required by the
                   Transfer Agent for redemption by corporations, partnerships
                   or other organizations, executors, administrators, trust-
                   ees, custodians or guardians, or if the redemption is re-
                   quested by anyone other than the shareholder(s) of record.
               Transfers of shares are subject to the same requirements. A
            signature guarantee is not required for redemptions of $50,000 or
            less, requested by and payable to all shareholders of record for
            the account, to be sent to the address of record for that account.
            To avoid delay in redemption or transfer, shareholders having any
            questions about these requirements should contact the Transfer
            Agent in writing or call 1-800-426-0107 before submitting a re-
            quest. Redemption or transfer requests will not be honored until
            all required documents in the proper form have been received by
            the Transfer Agent. This redemption option does not apply to
            shares held in broker "street name" accounts.
               If the proceeds of the redemption (i) exceed $50,000, (ii) are
            to be paid to a person other than the record owner, (iii) are to
            be sent to an address other than the address of the account on the
            Transfer Agent's records, or (iv) are to be paid to a corporation,
            partnership, trust or fiduciary, the signature(s) on the redemp-
            tion request and on the certificates, if any, or stock power must
            be guaranteed as described above, except that the Distributor may
            waive the signature guarantee requirement for redemptions up to
            $2,500 by a trustee of a qualified retirement plan, the adminis-
            trator for which has an agreement with the Distributor.
 
TELEPHONE   The Trust accepts telephone requests for redemption of
REDEMPTIONS uncertificated shares for amounts up to $50,000 within any 7 cal-
            endar day period, except for investors who have specifically de-
            clined telephone redemption privileges on the account application
            or elected in writing not to utilize telephone redemptions. The
            proceeds of a telephone redemption
 

54   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            will be sent to the record shareholder at his record address.
            Changes in account information must be made in a written authori-
            zation with a signature guarantee. See "How to Buy Shares--Signa-
            ture Guarantee." Telephone redemptions will not be accepted during
            the 30-day period following any change in an account's record ad-
            dress. This redemption option does not apply to shares held in
            broker "street name" accounts.
               By completing an account application, an investor agrees that
            the Trust, the Distributor and the Transfer Agent shall not be li-
            able for any loss incurred by the investor by reason of the Trust
            accepting unauthorized telephone redemption requests for his ac-
            count if the Trust reasonably believes the instructions to be gen-
            uine. Thus, shareholders risk possible losses in the event of a
            telephone redemption not authorized by them. The Trust may accept
            telephone redemption instructions from any person identifying him-
            self as the owner of an account or the owner's broker where the
            owner has not declined in writing to utilize this service. The
            Trust will employ reasonable procedures to confirm that instruc-
            tions communicated by telephone are genuine, and may be liable for
            any losses due to unauthorized or fraudulent instructions if it
            fails to employ such procedures. The Trust will require a form of
            personal identification prior to acting on a caller's telephone
            instructions, will provide written confirmations of such transac-
            tions and will record telephone instructions.
               A shareholder making a telephone redemption should call the
            Transfer Agent at 1-800-426-0107 and state (i) the name of the
            shareholder as it appears on the Transfer Agent's records, (ii)
            his account number with the Trust, (iii) the amount to be with-
            drawn and (iv) the name of the person requesting the redemption.
            Usually the proceeds are sent to the investor on the next Trust
            business day after the redemption is effected, provided the re-
            demption request is received prior to the close of regular trading
            (normally 4:00 p.m., Eastern time) on the Exchange that day. If
            the redemption request is received after the close of the Ex-
            change, the redemption is effected on the following Trust business
            day at that day's net asset value and the proceeds are usually
            sent to the investor on the second following Trust business day.
            The Trust reserves the right to terminate or modify the telephone
            redemption service at any time. During times of severe disruptions
            in the securities markets, the volume of calls may make it diffi-
            cult to redeem by telephone, in which case a shareholder may wish
            to send a written request for redemption as described under "Writ-
            ten Requests" above. Telephone communications may be recorded by
            the Distributor or the Transfer Agent.
 
FUND LINK   If a shareholder has established Fund Link, the shareholder may
REDEMPTIONS redeem shares by telephone and have the redemption proceeds sent
            to a designated account at a financial institution. Fund Link is
            normally established within 45 days of receipt of a Fund Link ap-
            plication by the Transfer Agent. To use Fund Link for redemptions,
            call the Transfer Agent at 1-800-426-0107. Subject to the limita-
            tions set forth above under "Telephone Redemptions," the Distribu-
            tor, the Trust and the Transfer Agent may rely on instructions by
            any registered owner believed to be genuine and will not be re-
            sponsible to any shareholder for any loss, damage or expense aris-
            ing out of such instructions. Requests received by the Transfer
            Agent prior to the close of regular trading (normally 4:00 p.m.,
            Eastern time) on the Exchange on a business day will be processed
            at the net asset value on that day and the proceeds (less any
            CDSC) will normally be sent to the designated bank account on the
            following business day and received by the bank on the second or
            third business day. If the redemption request is received after
            the close of regular trading on the Exchange, the redemption is
            effected on the following business day. Shares purchased by check
            may not be redeemed through Fund Link until such shares have been
            owned (i.e., paid for) for at least 15 days. Fund Link may not be
            used to redeem shares held in certificated form.
              Changes in bank account information must be made by completing a
            new Fund Link application, signed by all owners of record of the
            account, with all signatures guaranteed. See "How to Buy Shares--
            Signature Guarantee." See "How to Buy Shares--PIMCO Funds Fund
            Link" for information on establishing the Fund Link privilege. The
            Trust may terminate the Fund Link program at any time without no-
            tice to shareholders. This redemption option does not apply to
            shares held in broker "street name" accounts.

 
                                               November 1, 1998 Prospectus   55
<PAGE>
 

 
PIMCO FUNDS PIMCO Funds Automated Telephone System ("ATS") is an automated
AUTOMATED   telephone system that enables shareholders to perform a number of
TELEPHONE   account transactions automatically using a touch-tone telephone.
SYSTEM      ATS may be used on already-established Fund accounts after you ob-
            tain a Personal Identification Number (PIN) by calling the special
            ATS number: 1-800-223-2413.
            PURCHASING SHARES. You may purchase shares in amounts up to
            $100,000 by telephone by calling 1-800-223-2413. You must have es-
            tablished ATS privileges to link your bank account with the Fund
            to pay for these purchases.
            EXCHANGING SHARES. With the PIMCO Funds Exchange Privilege, you
            can exchange shares automatically by telephone from your Fund Link
            Account to another PIMCO Funds account you have already estab-
            lished by calling 1-800-223-2413. Please refer to "Exchange Privi-
            lege" for details.
            REDEMPTIONS. You may redeem shares by telephone automatically by
            calling 1-800-223-2413 and the Fund will send the proceeds di-
            rectly to your Fund bank account. Please refer to "How to Redeem"
            for details.
 
EXPEDITED   If a shareholder has given authorization for expedited wire re-
WIRE        demption, shares can be redeemed and the proceeds sent by federal
TRANSFER    wire transfer to a single previously designated bank account. Re-
REDEMPTIONS quests received by the Trust prior to the close of the Exchange
            will result in shares being redeemed that day at the next deter-
            mined net asset value (less any CDSC) and normally the proceeds
            being sent to the designated bank account the following business
            day. The bank must be a member of the Federal Reserve wire system.
            Delivery of the proceeds of a wire redemption request may be de-
            layed by the Trust for up to 7 days if the Distributor deems it
            appropriate under then current market conditions. Once authoriza-
            tion is on file, the Trust will honor requests by any person iden-
            tifying himself as the owner of an account or the owner's broker
            by telephone at 1-800-426-0107 or by written instructions. The
            Trust cannot be responsible for the efficiency of the Federal Re-
            serve wire system or the shareholder's bank. The Trust does not
            currently charge for wire transfers. The shareholder is responsi-
            ble for any charges imposed by the shareholder's bank. The minimum
            amount that may be wired is $2,500. The Trust reserves the right
            to change this minimum or to terminate the wire redemption privi-
            lege. Shares purchased by check may not be redeemed by wire trans-
            fer until such shares have been owned (i.e., paid for) for at
            least 15 days. Expedited wire transfer redemptions may be autho-
            rized by completing a form available from the Distributor. Wire
            redemptions may not be used to redeem shares in certificated form.
            To change the name of the single bank account designated to re-
            ceive wire redemption proceeds, it is necessary to send a written
            request with signatures guaranteed to PIMCO Funds Distributors
            LLC, P.O. Box 5866, Denver, CO 80217-5866. See "How to Buy
            Shares--Signature Guarantee." This redemption option does not ap-
            ply to shares held in broker "street name" accounts.
 
CERTIFICATEDTo redeem shares for which certificates have been issued, the cer-
SHARES      tificates must be mailed to or deposited with the Trust, duly en-
            dorsed or accompanied by a duly endorsed stock power or by a writ-
            ten request for redemption. Signatures must be guaranteed as de-
            scribed under "How to Buy Shares--Signature Guarantee." Further
            documentation may be requested from institutions or fiduciary ac-
            counts, such as corporations, custodians (e.g., under the Uniform
            Gifts to Minors Act), executors, administrators, trustees or
            guardians ("institutional account owners"). The redemption request
            and stock power must be signed exactly as the account is regis-
            tered, including indication of any special capacity of the regis-
            tered owner.
 
AUTOMATIC   An investor who owns or buys shares of a Fund having a net asset
WITHDRAWAL  value of $10,000 or more may open an Automatic Withdrawal Plan and
PLAN        have a designated sum of money (not less than $100 per Fund) paid
            monthly (or quarterly) to the investor or another person. Such a
            plan may be established by completing the appropriate section of
            the account application or you may obtain an Automatic Withdrawal
            Plan application from the Distributor or your broker. If an Auto-
            matic Withdrawal Plan is set up after the account is established
            providing for payment to a person other than the record share-
            holder or to an address other than the address of record, a signa-
            ture guarantee is required. See "How to Buy Shares--Signature
            Guarantee." Class A, Class B and Class C shares of any Fund are
            deposited in a plan account

 
56   PIMCO Funds: Multi-Manager Series
<PAGE>
 
            and all distributions are reinvested in additional shares of the
            particular class of the Fund at net asset value. Shares in a plan
            account are then redeemed at net asset value (less any applicable
            CDSC) to make each withdrawal payment. Any applicable CDSC may be
            waived for certain redemptions under an Automatic Withdrawal Plan.
            See "Alternative Purchase Arrangements--Waiver of Contingent De-
            ferred Sales Charges."
 
               Redemptions for the purpose of withdrawals are ordinarily made
            on the business day preceding the day of payment at that day's
            closing net asset value and checks are mailed on the day of pay-
            ment selected by the shareholder. The Transfer Agent may acceler-
            ate the redemption and check mailing date by one day to avoid
            weekend delays. Payment will be made to any person the investor
            designates; however, if the shares are registered in the name of a
            trustee or other fiduciary, payment will be made only to the fidu-
            ciary, except in the case of a profit-sharing or pension plan
            where payment will be made to the designee. As withdrawal payments
            may include a return of principal, they cannot be considered a
            guaranteed annuity or actual yield of income to the investor. The
            redemption of shares in connection with an Automatic Withdrawal
            Plan may result in a gain or loss for tax purposes. Continued
            withdrawals in excess of income will reduce and possibly exhaust
            invested principal, especially in the event of a market decline.
            The maintenance of an Automatic Withdrawal Plan concurrently with
            purchases of additional shares of the Fund would be disadvanta-
            geous to the investor because of the CDSC that may become payable
            on such withdrawals in the case of Class A, Class B or Class C
            shares and because of the initial sales charge in the case of
            Class A shares. For this reason, the minimum investment accepted
            for a Fund while an Automatic Withdrawal Plan is in effect for
            that Fund is $1,000, and an investor may not maintain a plan for
            the accumulation of shares of the Fund (other than through rein-
            vestment of distributions) and an Automatic Withdrawal Plan at the
            same time. The Trust or the Distributor may terminate or change
            the terms of the Automatic Withdrawal Plan at any time.
               Because the Automatic Withdrawal Plan may involve invasion of
            capital, investors should consider carefully with their own finan-
            cial advisers whether the plan and the specified amounts to be
            withdrawn are appropriate in their circumstances. The Trust and
            the Distributor make no recommendations or representations in this
            regard.
 
REDEMPTIONS The Trust agrees to redeem shares of each Fund solely in cash up
IN KIND     to the lesser of $250,000 or 1% of the Fund's net assets during
            any 90-day period for any one shareholder. In consideration of the
            best interests of the remaining shareholders, the Trust reserves
            the right to pay any redemption proceeds exceeding this amount in
            whole or in part by a distribution in kind of securities held by a
            Fund in lieu of cash. Except for Funds with a tax-efficient man-
            agement strategy, it is highly unlikely that shares would ever be
            redeemed in kind. When shares are redeemed in kind, the redeeming
            shareholder should expect to incur transaction costs upon the dis-
            position of the securities received in the distribution.
 
            Distributor and Distribution and Servicing Plans
 
            PIMCO Funds Distributors LLC (the "Distributor"), a wholly owned
            subsidiary of the Adviser, is the principal underwriter of the
            Trust's shares and in that connection makes distribution and ser-
            vicing payments to participating brokers and servicing payments to
            certain banks and other financial intermediaries in connection
            with the sale of Class B and Class C shares and servicing payments
            to participating brokers, certain banks and other financial inter-
            mediaries in connection with the sale of Class A shares. In the
            case of Class A shares, these parties are also compensated based
            on the amount of the front-end sales charge reallowed by the Dis-
            tributor, except in cases where Class A shares are sold without a
            front-end sales charge (although the Distributor may pay brokers
            additional compensation in connection with sales of Class A shares
            without a sales charge). In the case of Class B shares, partici-
            pating brokers and other financial intermediaries are compensated
            by an advance of a sales commission by the Distributor. In the
            case of Class C shares, part or all of the first year's distribu-
            tion and servicing fee is generally paid at the time of sale.

 
                                                November 1, 1998 Prospectus  57
<PAGE>
 

            Pursuant to a Distribution Agreement with the Trust, with respect
            to each Fund's Class A, Class B and Class C shares, the Distribu-
            tor bears various other promotional and sales related expenses,
            including the cost of printing and mailing prospectuses to persons
            other than current shareholders. The Distributor, located at 2187
            Atlantic Street, Stamford, Connecticut 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.
 
            CLASS A SERVICING FEES As compensation for services rendered and
            expenses borne by the Distributor in connection with personal
            services rendered to Class A shareholders of the Trust and the
            maintenance of Class A shareholder accounts, the Trust pays the
            Distributor servicing fees up to the annual rate of .25% (calcu-
            lated as a percentage of each Fund's average daily net assets at-
            tributable to Class A shares).
 
            CLASS B AND CLASS C DISTRIBUTION AND SERVICING FEES As compensa-
            tion for services rendered and expenses borne by the Distributor
            in connection with the distribution of Class B and Class C shares
            of the Trust, and in connection with personal services rendered to
            Class B and Class C shareholders of the Trust and the maintenance
            of Class B and Class C shareholder accounts, the Trust pays the
            Distributor servicing and distribution fees up to the annual rates
            set forth below (calculated as a percentage of each Fund's average
            daily net assets attributable to Class B and Class C shares,
            respectively):
 
 
<TABLE>
<CAPTION>
                      SERVICING DISTRIBUTION
           FUND       FEE       FEE
           ---------------------------------
           <S>        <C>       <C>
           All Funds  .25%      .75%
</TABLE>
 
 
               The Class A servicing fees and Class B and Class C distribution
            and servicing fees paid to the Distributor are made under Distri-
            bution and Servicing Plans adopted pursuant to Rule 12b-l under
            the Investment Company Act of 1940, as amended (the "1940 Act"),
            and are of the type known as "compensation" plans. This means
            that, although the Trustees of the Trust are expected to take into
            account the expenses of the Distributor and its predecessors in
            their periodic review of the Distribution and Servicing Plans, the
            fees are payable to compensate the Distributor for services ren-
            dered even if the amount paid exceeds the Distributor's expenses.
               The distribution fee applicable to Class B and Class C shares
            may be spent by the Distributor on any activities or expenses pri-
            marily intended to result in the sale of Class B or Class C
            shares, respectively, including compensation to, and expenses (in-
            cluding overhead and telephone expenses) of, financial consultants
            or other employees of the Distributor or of participating or in-
            troducing brokers who engage in distribution of Class B or Class C
            shares, printing of prospectuses and reports for other than exist-
            ing Class B or Class C shareholders, advertising, and preparation,
            printing and distribution of sales literature. The servicing fee,
            applicable to Class A, Class B and Class C shares of the Trust,
            may be spent by the Distributor on personal services rendered to
            shareholders of the Trust and the maintenance of shareholder ac-
            counts, including compensation to, and expenses (including tele-
            phone and overhead expenses) of, financial consultants or other
            employees of participating or introducing brokers, certain banks
            and other financial intermediaries who aid in the processing of
            purchase or redemption requests or the processing of dividend pay-
            ments, who provide information periodically to shareholders show-
            ing their positions in a Fund's shares, who forward communications
            from the Trust to shareholders, who render ongoing advice concern-
            ing the suitability of particular investment opportunities offered
            by the Trust in light of the shareholders' needs, who respond to
            inquiries from shareholders relating to such services, or who
            train personnel in the provision of such services. Distribution
            and servicing fees may also be spent on interest relating to
            unreimbursed distribution or servicing expenses from prior years.
               Many of the Distributor's sales and servicing efforts involve
            the Trust as a whole, so that fees paid by Class A, Class B or
            Class C shares of any Fund may indirectly support sales and ser-
            vicing efforts relating to the other Funds' shares of the same
            class. In reporting its expenses to the Trustees, the Distributor
            itemizes expenses that relate to the

 
58   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            distribution and/or servicing of a single Fund's shares, and allo-
            cates other expenses among the Funds based on their relative net
            assets. Expenses allocated to each Fund are further allocated
            among its classes of shares annually based on the relative sales
            of each class, except for any expenses that relate only to the
            sale or servicing of a single class. The Distributor may make pay-
            ments to brokers (and with respect to servicing fees only, to cer-
            tain banks and other financial intermediaries) of up to the fol-
            lowing percentages annually of the average daily net assets at-
            tributable to shares in the accounts of their customers or cli-
            ents:
 
 
              ALL FUNDS(/1/)
 
<TABLE>
<CAPTION>
                            SERVICING DISTRIBUTION
                            FEE       FEE
           ---------------------------------------
           <S>              <C>       <C>
           Class A          .25%      N/A
           ---------------------------------------
           Class B (/2/)    .25%      None
           ---------------------------------------
           Class C
            (purchased
            before July 1,
            1991)           .25%      None
           ---------------------------------------
           Class C (/3/)
            (purchased on
            or after July
            1, 1991)        .25%      .65%
</TABLE>
 
            1. Applies, in part, to Class A, Class B and Class C shares of the
            Trust issued to former shareholders of PIMCO Advisors Funds in
            connection with the reorganizations/mergers of series of PIMCO Ad-
            visors Funds as/with Funds of the Trust in transactions which took
            place on January 17, 1997.
            2. Payable only with respect to shares outstanding for one year or
            more.
            3. Payable only with respect to shares outstanding for one year or
            more except in the case of shares for which no payment is made to
            the party at the time of sale.
 
               The Distributor may from time to time pay additional cash bo-
            nuses or other incentives to selected participating brokers in
            connection with the sale or servicing of Class A, Class B and
            Class C shares of the Funds. On some occasions, such bonuses or
            incentives may be conditioned upon the sale of a specified minimum
            dollar amount of the shares of a Fund and/or all of the Funds to-
            gether or a particular class of shares, during a specific period
            of time. The Distributor currently expects that such additional
            bonuses or incentives will not exceed .50% of the amount of any
            sale. In its capacity as administrator for the Funds, PIMCO Advi-
            sors may pay participating brokers and other intermediaries for
            sub-transfer agency and other services.
               If in any year the Distributor's expenses incurred in connec-
            tion with the distribution of Class B and Class C shares and, for
            Class A, Class B and Class C shares, in connection with the ser-
            vicing of shareholders and the maintenance of shareholder ac-
            counts, exceed the distribution and/or servicing fees paid by the
            Trust, the Distributor would recover such excess only if the Dis-
            tribution and Servicing Plan with respect to such class of shares
            continues to be in effect in some later year when the distribution
            and/or servicing fees exceed the Distributor's expenses. The Trust
            is not obligated to repay any unreimbursed expenses that may exist
            at such time, if any, as the relevant Distribution and Servicing
            Plan terminates.
               From time to time, expenses of principal underwriters incurred
            in connection with the distribution of Class B and Class C shares
            of the Funds, and in connection with the servicing of Class A,
            Class B and Class C shareholders of the Funds and the maintenance
            of Class A, Class B and Class C shareholder accounts, may exceed
            the distribution and/or servicing fees collected by the Distribu-
            tor. Class A, Class B and Class C Distribution and Servicing
            Plans, which are similar to the Trust's current Plans, were in ef-
            fect prior to January 17, 1997 in respect of series of PIMCO Advi-
            sors Funds that were predecessors of certain Funds of the Trust.
            The remaining Funds did not offer Class A, Class B or Class C
            shares prior to January 17, 1997. As of June 30, 1998, such ex-
            penses were approximately $11,946,000 in excess of payments under
            the Class A Plan, $22,563,000 in excess of payments under the
            Class B Plan and $2,252,000 in excess of payments under the Class
            C Plan.

 
                                               November 1, 1998 Prospectus   59
<PAGE>
 
            How Net Asset Value Is Determined
 
            The net asset values of Class A, Class B and Class C shares of
            each Fund of the Trust will be determined once on each day on
            which the Exchange is open (a "Business Day"), as of the close of
            regular trading (normally 4:00 p.m., Eastern time) on the Ex-
            change. Net asset value will not be determined on days on which
            the Exchange is closed.
               Portfolio securities and other assets for which market quota-
            tions are readily available are stated at market value. Fixed in-
            come securities are normally valued on the basis of quotations ob-
            tained from brokers and dealers or pricing services, which take
            into account appropriate factors such as institutional-sized trad-
            ing in similar groups of securities, yield, quality, coupon rate,
            maturity, type of issue, trading characteristics, and other market
            data. Certain fixed income securities for which daily market quo-
            tations are not readily available may be valued, pursuant to
            guidelines established by the Board of Trustees, with reference to
            fixed income securities whose prices are more readily obtainable
            and whose durations are comparable to the securities being valued.
            Short-term investments having a maturity of 60 days or less are
            valued at amortized cost, when the Board of Trustees determines
            that amortized cost is their fair value. Exchange-traded options,
            futures and options on futures are valued at the settlement price
            as determined by the appropriate clearing corporation. All other
            securities and assets are valued at their fair value as determined
            in good faith by the Trustees or by persons acting at their direc-
            tion.
               Quotations of foreign securities in foreign currency are con-
            verted to U.S. dollar equivalents using foreign exchange quota-
            tions received from independent dealers. The calculation of the
            net asset value of the International and Precious Metals Funds may
            not take place contemporaneously with the determination of the
            prices of certain portfolio securities of foreign issuers used in
            such calculation. Further, under the Trust's procedures, the
            prices of foreign securities are determined using information de-
            rived from pricing services and other sources. Information that
            becomes known to the Trust or its agents after the time that net
            asset value is calculated on any Business Day may be assessed in
            determining net asset value per share after the time of receipt of
            the information, but will not be used to retroactively adjust the
            price of the security so determined earlier or on a prior day.
            Events affecting the values of portfolio securities that occur be-
            tween the time their prices are determined and the close of regu-
            lar trading on the Exchange (normally 4:00 p.m., Eastern time) may
            not be reflected in the calculation of net asset value. If events
            materially affecting the value of such securities occur during
            such period, then these securities may be valued at fair value as
            determined by the Adviser or a Portfolio Manager and approved in
            good faith by the Board of Trustees.
               Each Fund's liabilities are allocated among its classes. The
            total of such liabilities allocated to a class plus that class's
            distribution and/or servicing fees and any other expenses spe-
            cially allocated to that class are then deducted from the class's
            proportionate interest in the Fund's assets, and the resulting
            amount for each class is divided by the number of shares of that
            class outstanding to produce the class's "net asset value" per
            share. Under certain circumstances, the per share net asset value
            of the Class B and Class C shares of the Funds that do not declare
            regular income dividends on a daily basis may be lower than the
            per share net asset value of the Class A shares as a result of the
            daily expense accruals of the distribution fee applicable to the
            Class B and Class C shares. Generally, for Funds that pay income
            dividends, those dividends are expected to differ over time by ap-
            proximately the amount of the expense accrual differential between
            a particular Fund's classes.
 
            Distributions
 
            Shares begin earning dividends on the day after the date that
            funds are received by the Trust for the purchase of Class A, Class
            B and Class C shares. Net investment income from interest and div-
            idends, if any, will be declared and paid quarterly to sharehold-
            ers of record by the Balanced, Equity Income, Value and Renais-
            sance Funds. Net investment income from interest and dividends, if
            any, will be declared and paid at least annually to shareholders
            of record by the
 

60   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            Tax-Efficient Equity, Capital Appreciation, Growth, Value 25, Mid-
            Cap Growth, Target, Small-Cap Value, Opportunity, International,
            Innovation and Precious Metals Funds. Any net capital gains from
            the sale of portfolio securities will be distributed no less
            frequently than once annually. Net short-term capital gains may be
            paid more frequently.
               All dividends and/or distributions will be paid in the form of
            additional shares of the class of shares of the Fund to which the
            dividends and/or distributions relate or, at the election of the
            shareholder, of another Fund or other series of the Trust or of
            PIMCO Funds: Pacific Investment Management Series as described be-
            low, at net asset value, unless the shareholder elects to receive
            cash (either paid to shareholders directly or credited to their
            account with their participating broker). If a shareholder has
            elected to receive dividends and/or capital gain distributions in
            cash and the postal or other delivery service is unable to deliver
            checks to the shareholder's address of record, such shareholder's
            distributions will automatically be invested in the Money Market
            Fund of PIMCO Funds: Pacific Investment Management Series, until
            such shareholder is located. Dividends paid by each Fund with re-
            spect to each class of shares are calculated in the same manner
            and at the same time, but dividends on Class B and Class C shares
            are expected to be lower than dividends on Class A shares as a re-
            sult of the distribution fee applicable to Class B and Class C
            shares. There are no sales charges on reinvested dividends.
               Class A, Class B and Class C shareholders of the Trust may
            elect to invest dividends and/or distributions paid by any Fund in
            shares of the same class of any other Fund, another series of the
            Trust (such as a PIMCO Funds Asset Allocation Series portfolio),
            or a series of PIMCO Funds: Pacific Investment Management Series
            which offers such class of shares at net asset value. The share-
            holder must have an account existing in the Fund or series se-
            lected for investment with the identical registered name and ad-
            dress and must elect this option on the account application, on a
            form provided for that purpose or by a telephone request to the
            Transfer Agent at 1-800-426-0107. For further information on this
            option, contact your broker or call the Distributor at 1-800-426-
            0107.
 
            Taxes
 
            Each Fund intends to qualify as a regulated investment company an-
            nually and to elect to be treated as a regulated investment com-
            pany under the Internal Revenue Code of 1986, as amended (the
            "Code"). As such, a Fund generally will not pay federal income tax
            on the income and gains it pays as dividends to its shareholders.
            In order to avoid a 4% federal excise tax, each Fund intends to
            distribute each year substantially all of its net income and
            gains.
               Shareholders subject to U.S. federal income tax will be subject
            to tax on dividends received from a Fund, regardless of whether
            received in cash or reinvested in additional shares. Distributions
            received by tax-exempt shareholders will not be subject to federal
            income tax to the extent permitted under applicable tax law. All
            shareholders must treat dividends, other than capital gain divi-
            dends, exempt-interest dividends and dividends that represent a
            return of capital to shareholders, as ordinary income. In particu-
            lar, distributions derived from short-term gains will be treated
            as ordinary income. Dividends designated by a Fund as capital gain
            dividends derived from the Fund's net capital gains (that is, the
            excess of its net long-term capital gains over its net short-term
            capital losses) are taxable to shareholders as long-term capital
            gain (generally subject to a 20% tax rate) except as provided by
            an applicable tax exemption. Any distributions that are not from a
            Fund's net investment income or net capital gain may be character-
            ized as a return of capital to shareholders or, in some cases, as
            capital gain. Certain dividends declared in October, November or
            December of a calendar year are taxable to shareholders (who oth-
            erwise are subject to tax on dividends) as though received on De-
            cember 31 of that year if paid to shareholders during January of
            the following calendar year. Each Fund will advise shareholders
            annually of the amount and nature of the dividends paid to them.
            Dividends derived from interest on certain U.S. Government securi-
            ties may be exempt from state and local taxes, although interest
            on mortgage-backed U.S. Government securities may not be so ex-
            empt. While the Tax-Efficient Equity Fund seeks to minimize tax-
            able distributions, the Fund may be expected to earn and distrib-
            ute taxable income and may also be expected to realize and dis-
            tribute capital gains from time to time.
 

                                                November 1, 1998 Prospectus   61
<PAGE>
 

               Current federal tax law requires the holder of a U.S. Treasury
            or other fixed income zero-coupon security to accrue as income
            each year a portion of the discount at which the security was pur-
            chased, even though the holder receives no interest payment in
            cash on the security during the year. In addition, pay-in-kind se-
            curities will give rise to income which is required to be distrib-
            uted and is taxable even though the Fund holding the security re-
            ceives no interest payment in cash on the security during the
            year. Also, a portion of the yield on certain high yield securi-
            ties (including certain pay-in-kind securities) issued after July
            10, 1989 may be treated as dividends. Accordingly, each Fund that
            holds the foregoing kinds of securities may be required to pay out
            as an income distribution each year an amount which is greater
            than the total amount of cash interest the Fund actually received.
            Such distributions may be made from the cash assets of the Fund or
            by liquidation of portfolio securities, if necessary. The Fund may
            realize gains or losses from such liquidations. In the event the
            Fund realizes net capital gains from such transactions, its share-
            holders may receive a larger capital gain distribution, if any,
            than they would in the absence of such transactions.
               Taxable shareholders should note that the timing of their in-
            vestment or redemptions could have undesirable tax consequences.
            Dividends and distributions on a Fund's shares are generally sub-
            ject to federal income tax as described herein to the extent they
            do not exceed the Fund's realized income and gains, even though
            such dividends and distributions may economically represent a re-
            turn of a particular shareholder's investment. Such distributions
            are likely to occur in respect of shares purchased at a time when
            the Fund's net asset value reflects gains that are either
            unrealized or realized but not distributed. Such realized gains
            may be required to be distributed even when a Fund's net asset
            value also reflects unrealized losses. If shares are redeemed be-
            fore payment of an exempt-interest dividend, shareholders may re-
            alize a taxable capital gain, whereas by waiting and receiving the
            exempt-interest dividend, a portion of their share value would
            have been received in the form of tax-free income.
               The preceding discussion relates only to federal income tax;
            the consequences under other tax laws may differ. Shareholders
            should consult their tax advisers as to the possible application
            of foreign, state and local income tax laws to Trust dividends and
            capital gain distributions. For additional information relating to
            the tax aspects of investing in a Fund, see the Statement of Addi-
            tional Information.
 
            Management of the Trust
 
            The business affairs of the Trust are managed under the direction
            of the Board of Trustees. Information about the Trustees and the
            Trust's executive officers may be found in the Statement of Addi-
            tional Information under the heading "Management of the Trust."
 
INVESTMENT  PIMCO ADVISORS serves as investment adviser to the Funds pursuant
ADVISER     to an investment advisory agreement with the Trust. PIMCO Advisors
            is a Delaware limited partnership organized in 1987. PIMCO Advi-
            sors provides investment management and advisory services to pri-
            vate accounts of institutional and individual clients and to mu-
            tual funds. Total assets under management by PIMCO Advisors and
            its subsidiary partnerships as of September 30, 1998 were approxi-
            mately $225.9 billion. The general partners of PIMCO Advisors are
            PIMCO Partners, G.P. and PIMCO Advisors Holdings L.P. ("PAH").
            PIMCO Partners, G.P. is a general partnership between PIMCO Hold-
            ing LLC, a Delaware limited liability company and an indirect
            wholly-owned subsidiary of Pacific Life Insurance Company, and
            PIMCO Partners LLC, a California limited liability company con-
            trolled by the current Managing Directors and two former Managing
            Directors of Pacific Investment Management. PIMCO Partners, G.P.
            is the sole general partner of PAH. PIMCO Advisors is governed by
            a Management Board, which exercises substantially all of the gov-
            ernance powers of the general partner and serves as the functional
            equivalent of a board of directors. PIMCO Advisors' address is 800
            Newport Center Drive, Newport Beach, California 92660. PIMCO Advi-
            sors is registered as an investment adviser with the Securities
            and Exchange Commission. PIMCO Advisors currently has seven sub-
            sidiary investment adviser partnerships, the following six of
            which manage one or more of the Funds: Blairlogie, Cadence,

 
62   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            Columbus Circle, NFJ, Pacific Investment Management and Paramet-
            ric. On or before March 31, 1999, it is anticipated that PIMCO Ad-
            visors will sell substantially all of its ownership interest in
            Blairlogie. See "Portfolio Managers--Blairlogie" below.
               Under the investment advisory agreement, PIMCO Advisors, sub-
            ject to the supervision of the Board of Trustees, is responsible
            for providing advice and guidance with respect to the Funds and
            for managing, either directly or through others selected by the
            Adviser, the investment of the Funds. PIMCO Advisors also fur-
            nishes to the Board of Trustees periodic reports on the investment
            performance of each Fund.
 
PORTFOLIO   Pursuant to portfolio management agreements, PIMCO Advisors em-
MANAGERS    ploys Portfolio Managers to provide investment advisory services
            to all of the Funds. With the exception of Van Eck (which manages
            the Precious Metals Fund), each Portfolio Manager is an affiliate
            of PIMCO Advisors. PIMCO Advisors (and not the Funds or the Trust)
            compensates the Portfolio Managers from its advisory fee. Under
            these agreements, a Portfolio Manager has full investment discre-
            tion and makes all determinations with respect to the investment
            of a Fund's assets, or, for the Balanced Fund, with respect to the
            portion of the Fund's assets allocated to the Portfolio Manager
            for investment, and makes all determinations respecting the pur-
            chase and sale of a Fund's securities and other investments. If a
            Portfolio Manager ceases to manage the portfolio of a Fund, PIMCO
            Advisors will either assume full responsibility for the management
            of that Fund, or retain a new portfolio manager subject to the ap-
            proval of the Trustees and the Fund's shareholders.
 
            COLUMBUS CIRCLE manages the Renaissance, Growth, Target, Opportu-
            nity and Innovation Funds (the "Columbus Circle Funds"). Columbus
            Circle is an investment management firm organized as a general
            partnership. Columbus Circle has two partners: PIMCO Advisors as
            the supervisory partner, and Columbus Circle Investors Management
            Inc. as the managing partner. Columbus Circle Investors Division
            of Thomson Advisory Group L.P. ("TAG"), the predecessor investment
            adviser to Columbus Circle, commenced operations in 1975. Accounts
            managed by Columbus Circle had combined assets as of September 30,
            1998 of approximately $7.8 billion. Columbus Circle's address is
            Metro Center, One Station Place, 8th Floor, Stamford, Connecticut
            06902. Columbus Circle is registered as an investment adviser with
            the Securities and Exchange Commission.
               At the center of Columbus Circle's equity investment strategy
            is its theory of Positive Momentum & Positive Surprise. This the-
            ory asserts that a good company doing better than generally ex-
            pected will experience a rise in its stock price, and conversely,
            a company falling short of expectations will experience a drop in
            its stock price. Based on this theory, Columbus Circle attempts to
            manage the Columbus Circle Funds with a view to investing in grow-
            ing companies that are surprising the market with business results
            that are better than anticipated.
               Investment decisions made by Columbus Circle are generally made
            by one or more committees, although the following individuals have
            primary responsibility for the noted Columbus Circle Funds. An-
            thony Rizza is primarily responsible for the day-to-day management
            of the Growth Fund. Mr. Rizza, a Managing Director of Columbus
            Circle, has 12 years of investment management experience. He re-
            ceived his bachelor's degree from the University of Connecticut,
            and he is a Chartered Financial Analyst. Marc Felman is primarily
            responsible for the day-to-day management of the Opportunity Fund
            and Donald A. Chiboucas has secondary responsibility. Mr. Felman,
            a Managing Director at Columbus Circle, has 10 years of investment
            management experience. He received his bachelor's degree from Em-
            ory University and his MBA from the Wharton School of Business.
            Mr. Chiboucas, a Managing Director of Columbus Circle, has more
            than 30 years of investment management experience. He received his
            bachelor's degree and MBA from the University of California,
            Berkeley, and he is a Chartered Financial Analyst. Amy H. Hogan is
            primarily responsible for the day-to-day management of the Target
            Fund. Ms. Hogan, a Managing Director of Columbus Circle, has 13
            years of investment management experience. She received her bache-
            lor's degree and MBA from the University of Wisconsin, and she is
            a Chartered Financial Analyst. Anthony Rizza (see above) and Den-
            nis P. McKechnie are primarily responsible for the day-to-day man-
            agement of the Innovation Fund. Mr. McKechnie, a research analyst
            at
 
                                               November 1, 1998 Prospectus   63
<PAGE>
 
            Columbus Circle, has 7 years of investment management experience.
            He received his bachelor's degree from Purdue University and his
            MBA from Columbia University. Clifford G. Fox is primarily respon-
            sible for the day-to-day management of the Renaissance Fund. Mr.
            Fox, a Managing Director of Columbus Circle, has 17 years of in-
            vestment management experience. He received his bachelor's degree
            from the University of Pennsylvania and his MBA from New York Uni-
            versity, and he is a Chartered Financial Analyst.
 
            CADENCE manages the Capital Appreciation and Mid-Cap Growth Funds,
            as well as a portion of the Common Stock Segment of the Balanced
            Fund (the "Cadence Funds"). Cadence is an investment management
            firm organized as a general partnership. Cadence has two partners:
            PIMCO Advisors as the supervisory partner, and Cadence Capital
            Management Inc. as the managing partner. Cadence Capital Manage-
            ment Corporation, the predecessor investment adviser to Cadence,
            commenced operations in 1988. Accounts managed by Cadence had com-
            bined assets as of September 30, 1998 of approximately $6.1 bil-
            lion. Cadence's address is Exchange Place, 53 State Street, Bos-
            ton, Massachusetts 02109. Cadence is registered as an investment
            adviser with the Securities and Exchange Commission.
               David B. Breed, William B. Bannick, Katherine A. Burdon and Pe-
            ter B. McManus are primarily responsible for the day-to-day man-
            agement of the Cadence Funds. Mr. Breed is a Managing Director,
            the Chief Executive Officer, and a founding partner of Cadence,
            and has 25 years' investment management experience. He has been
            the driving force in developing the firm's growth-oriented stock
            screening and selection process and has been with Cadence or its
            predecessor since its inception. Mr. Breed graduated from the Uni-
            versity of Massachusetts and received his MBA from the Wharton
            School of Business. He is a Chartered Financial Analyst. Mr.
            Bannick is a Managing Director and Executive Vice President of Ca-
            dence and has 13 years' investment management experience. He pre-
            viously served as Executive Vice President of George D. Bjurman &
            Associates and as Supervising Portfolio Manager of Trinity Invest-
            ment Management Corporation. Mr. Bannick joined the predecessor of
            Cadence in 1992. He graduated from the University of Massachusetts
            and received his MBA from Boston University. Mr. Bannick is
            a Chartered Financial Analyst. Ms. Burdon is a Managing Director
            and Portfolio Manager of Cadence and has 10 years' investment man-
            agement experience. She previously served as a Vice President and
            Portfolio Manager of The Boston Company. Ms. Burdon joined the
            predecessor of Cadence in 1993. She graduated from Stanford Uni-
            versity and received a Master of Science degree from Northeastern
            University. Ms. Burdon is a Chartered Financial Analyst and Certi-
            fied Public Accountant. Mr. McManus is Director of Fund Management
            of Cadence and has 21 years' investment management experience. He
            previously served as a Vice President of Bank of Boston. Mr. Mc-
            Manus joined Cadence in 1994. He graduated from the University of
            Massachusetts, and he is certified as a Financial Planner.
 
            NFJ manages the Equity Income, Value, Value 25 and Small-Cap Value
            Funds, as well as a portion of the Common Stock Segment of the
            Balanced Fund. NFJ is an investment management firm organized as a
            general partnership. NFJ has two partners: PIMCO Advisors as the
            supervisory partner, and NFJ Management Inc. as the managing part-
            ner. NFJ Investment Group, Inc., the predecessor investment ad-
            viser to NFJ, commenced operations in 1989. Accounts managed by
            NFJ had combined assets as of September 30, 1998 of approximately
            $2.2 billion. NFJ's address is 2121 San Jacinto, Suite 1840, Dal-
            las, Texas 75201. NFJ is registered as an investment adviser with
            the Securities and Exchange Commission.
               Chris Najork and Benjamin Fischer are responsible for the day-
            to-day management of the Equity Income Fund and the portion of the
            Common Stock Segment of the Balanced Fund allocated to NFJ. Mr.
            Najork is a Managing Director and a founding partner of NFJ and
            has 30 years' experience encompassing equity research and portfo-
            lio management. He received his bachelor's degree and MBA from
            Southern Methodist University, and he is a Chartered Financial An-
            alyst. Mr. Fischer is a Managing Director and a founding partner
            of NFJ and has 32 years' experience encompassing equity research
            and portfolio management. He received his bachelor's degree from
            Oklahoma University and his MBA from the New York University Grad-
            uate School of Business. He is a Chartered Financial Analyst.
 

64   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            Messrs. Najork, Fischer and Paul A. Magnuson are primarily respon-
            sible for the day-to-day management of the Value Fund and the
            Small-Cap Value Fund. Mr. Magnuson, a research analyst at NFJ, has
            13 years' experience in equity research and portfolio management.
            He received his bachelor's degree in Finance from the University
            of Nebraska-Lincoln. Messrs. Najork, Fischer and Cliff Hoover are
            primarily responsible for the day-to-day management of the Value
            25 Fund. Mr. Hoover is a principal at NFJ and has 24 years' expe-
            rience in portfolio management and banking. He received his bache-
            lor's degree and MBA from Texas Tech University. He is a Chartered
            Financial Analyst.
 
            BLAIRLOGIE manages the International Fund. Blairlogie is an in-
            vestment management firm, organized as a limited partnership under
            the laws of the United Kingdom, with two general partners and one
            limited partner. The general partners are PIMCO Advisors, which
            serves as the supervisory partner, and Blairlogie Holdings Limit-
            ed, a wholly owned subsidiary of PIMCO Advisors, which serves as
            the managing partner. The limited partner is Blairlogie Partners
            L.P., a limited partnership, the general partner of which is Pa-
            cific Asset Management LLC (a subsidiary of Pacific Life Insurance
            Company), and the limited partners of which are the principal ex-
            ecutive officers of Blairlogie Capital Management. Blairlogie Cap-
            ital Management Ltd., the predecessor investment adviser to
            Blairlogie, commenced operations in 1992. Accounts managed by
            Blairlogie had combined assets as of September 30, 1998 of approx-
            imately $700 million. Blairlogie's address is 4th Floor, 125
            Princes Street, Edinburgh EH2 4AD, Scotland. Blairlogie is regis-
            tered as an investment adviser with the Securities and Exchange
            Commission in the United States and with the Investment Management
            Regulatory Organisation in the United Kingdom.
               James Smith is primarily responsible for the day-to-day manage-
            ment of the International Fund. Mr. Smith is a Managing Director
            and the Chief Investment Officer of Blairlogie and is responsible
            for managing an investment team of six professionals who, in turn,
            specialize in selection of stocks within Europe, Asia, and the
            Americas, and in currency and derivatives. He previously served as
            a Senior Portfolio Manager at Murray Johnstone in Glasgow,
            Scotland, responsible for international investment management for
            North American clients, and at Schroder Investment Management in
            London. Mr. Smith received his bachelor's degree in Economics from
            London University and his MBA from Edinburgh University. He is an
            Associate of the Institute of Investment Management and Research.
               It is anticipated that PIMCO Advisors will sell substantially
            all of its ownership interest in Blairlogie to Alleghany Asset
            Management, Inc. on or before March 31, 1999 (the "Blairlogie
            Transaction"). The Blairlogie Transaction is subject to a number
            of conditions. PIMCO Advisors has determined to terminate its
            portfolio management agreement with Blairlogie with respect to the
            International Fund, effective on or about the date of the
            Blairlogie Transaction. Under the Trust's investment advisory
            agreement, PIMCO Advisors would then assume full responsibility
            for managing the International Fund's portfolio. This Prospectus
            will be supplemented or revised if these events do not occur sub-
            stantially in accordance with the schedule outlined above.
 
            PACIFIC INVESTMENT MANAGEMENT manages the Fixed Income Securities
            Segment of the Balanced Fund. Pacific Investment Management is an
            investment management firm organized as a general partnership. Pa-
            cific Investment Management has two partners: PIMCO Advisors as
            the supervisory partner, and PIMCO Management, Inc. as the manag-
            ing partner. Pacific Investment Management Company, the predeces-
            sor investment adviser to Pacific Investment Management, commenced
            operations in 1971. Pacific Investment Management had approxi-
            mately $148.1 billion of assets under management as of September
            30, 1998. Pacific Investment Management's address is 840 Newport
            Center Drive, Suite 300, Newport Beach, California 92660. Pacific
            Investment Management is registered as an investment adviser with
            the Securities and Exchange Commission and as a commodity trading
            adviser with the CFTC.
               William H. Gross is responsible for the day-to-day management
            of the Fixed Income Securities Segment of the Balanced Fund. Mr.
            Gross is a founder and a Managing Director of Pacific Investment
            Management and has been associated with Pacific Investment Manage-
            ment or its predecessor for more than 28 years. He has extensive
            investment experience in both credit research and fixed income
            portfolio management. He received his bachelor's degree from Duke
            University and his MBA from UCLA Graduate School of Business. Mr.
            Gross is a Chartered Financial Analyst and a member of The Los An-
            geles Society of Financial Analysts.
 

                                                November 1, 1998 Prospectus   65
<PAGE>
 
            PARAMETRIC manages the Tax-Efficient Equity Fund. Parametric is an
            investment management firm organized as a general partnership.
            Parametric has two partners: PIMCO Advisors as the supervisory
            partner, and Parametric Management Inc. as the managing partner.
            Parametric Portfolio Associates, Inc., the predecessor investment
            adviser to Parametric, commenced operations in 1987. Accounts man-
            aged by Parametric had combined assets as of September 30, 1998 of
            approximately $2.8 billion. Parametric's address is 7310 Columbia
            Center, 701 Fifth Avenue, Seattle, Washington 98104-7090. Paramet-
            ric is registered as an investment adviser with the Securities and
            Exchange Commission and as a commodity trading adviser with the
            CFTC.
               David Stein, Tom Seto and Cliff Quisenberry are primarily re-
            sponsible for the day-to-day management of the Tax-Efficient Eq-
            uity Fund. Mr. Stein is a Managing Director of Parametric and has
            been associated with Parametric since June of 1996. He also di-
            rects research and product development for Parametric. Mr. Stein
            graduated with bachelor's and master's degrees in Applied Mathe-
            matics from the University of Witwatersrand, South Africa, and re-
            ceived a Ph.D. in Applied Mathematics from Harvard University.
            Prior to joining Parametric, Mr. Stein served as the Director of
            Investment Research at GTE Investment Management, Director of Ac-
            tive Equity Strategies at the Vanguard Group, and Director of
            Quantitative Portfolio Management and Research at IBM. Mr. Seto is
            a Vice President of Parametric and has 7 years of experience in
            managing structured equity portfolios. Prior to joining Paramet-
            ric, he served as the Head of U.S. Equity Index Investments at
            Barclays Global Investors. Mr. Seto graduated from the University
            of Washington with a bachelor's degree in Electrical Engineering,
            and from the University of Chicago with an MBA in Finance. Mr.
            Quisenberry is a Vice President of Parametric and has been with
            Parametric since 1994. He previously served as a Vice President
            and Portfolio Manager at Cutler & Co., and as a Security Analyst
            and Portfolio Manager at Fred Alger Management. Mr. Quisenberry
            graduated from Yale University with a bachelor's degree in Econom-
            ics. He is a Chartered Financial Analyst.
 
            VAN ECK is an unaffiliated investment adviser that manages the
            Precious Metals Fund. Van Eck is a Delaware corporation which, to-
            gether with its affiliates, provides investment advisory services
            to other mutual funds and to private accounts. Van Eck is con-
            trolled by John C. van Eck who, along with members of his immedi-
            ate family, owns 100% of the stock of Van Eck. Accounts managed by
            Van Eck had combined assets as of September 30, 1998 of approxi-
            mately $1.2 billion. Van Eck's address is 99 Park Avenue, New
            York, NY 10001. Van Eck is registered as an investment adviser
            with the Securities and Exchange Commission.
               Henry J. Bingham, Executive Managing Director of Van Eck, has
            served as the portfolio manager responsible for the day-to-day
            management of the Precious Metals Fund since the Fund commenced
            operations.
 
            Registration as an investment adviser with the Securities and Ex-
            change Commission does not involve supervision by the Securities
            and Exchange Commission over investment advice, and registration
            with the CFTC as a commodity trading adviser does not involve su-
            pervision by the CFTC over commodities trading. The portfolio man-
            agement agreements are not exclusive, and Columbus Circle, Ca-
            dence, NFJ, Blairlogie, Pacific Investment Management, Parametric
            and Van Eck may provide, and currently are providing, investment
            management services to other clients, including other investment
            companies.
 
FUND
ADMINISTRATOR
            PIMCO Advisors also serves as administrator (the "Administrator")
            for the Funds' Class A, Class B and Class C shares pursuant to an
            administration agreement with the Trust. The Administrator pro-
            vides or procures administrative services for Class A, Class B and
            Class C shareholders of the Funds, which include clerical help and
            accounting, bookkeeping, internal audit services and certain other
            services required by the Funds, and preparation of reports to the
            Funds' shareholders and regulatory filings. The Administrator has
            retained Pacific Investment Management to provide such services as
            sub-administrator. The Administrator and/or the sub-administrator
            may also retain other affiliates to provide certain of these serv-
            ices. In addition, the Administrator, at its own expense, arranges
            for the provision of legal,

 
66    PIMCO Funds: Multi-Manager Series
<PAGE>
 

            audit, custody, transfer agency (including sub-transfer agency and
            other administrative services) and other services necessary for
            the ordinary operation of the Funds, and is responsible for the
            costs of registration of the Trust's shares and the printing of
            prospectuses and shareholder reports for current shareholders.
               The Funds (and not the Administrator) are responsible for the
            following expenses: (i) salaries and other compensation of any of
            the Trust's executive officers and employees who are not officers,
            directors, stockholders, or employees of PIMCO Advisors, Pacific
            Investment Management, or their subsidiaries or affiliates; (ii)
            taxes and governmental fees; (iii) brokerage fees and commissions
            and other portfolio transaction expenses; (iv) the costs of bor-
            rowing money, including interest expenses; (v) fees and expenses
            of the Trustees who are not "interested persons" of the Adviser,
            any Portfolio Manager, or the Trust, and any counsel retained ex-
            clusively for their benefit; (vi) extraordinary expenses, includ-
            ing costs of litigation and indemnification expenses; (vii) ex-
            penses which are capitalized in accordance with generally accepted
            accounting principles; and (viii) any expenses allocated or allo-
            cable to a specific class of shares, which include distribution
            and/or service fees payable with respect to Class A, Class B and
            Class C shares, and may include certain other expenses as permit-
            ted by the Trust's Multiple Class Plan adopted pursuant to Rule
            18f-3 under the 1940 Act, subject to review and approval by the
            Trustees.
 
ADVISORY    The Funds feature fixed advisory and administrative fees. For pro-
AND         viding or arranging for the provision of investment advisory serv-
ADMINIS-    ices to the Funds as described above, PIMCO Advisors receives
TRATIVE     monthly fees from each Fund at an annual rate based on the average
FEES        daily net assets of the Fund as follows:
 
<TABLE>
<CAPTION>
                                    ADVISORY
           FUND                     FEE RATE
           ---------------------------------
           <S>                      <C>
           Balanced, Equity
            Income, Value, Tax-
            Efficient Equity,
            Capital Appreciation
            and Mid-Cap Growth
            Funds                   .45%
           ---------------------------------
           Growth and Value 25
            Funds                   .50%
           ---------------------------------
           Target and Interna-
            tional Funds            .55%
           ---------------------------------
           Renaissance, Small-Cap
            Value and Precious
            Metals Funds            .60%
           ---------------------------------
           Opportunity and Innova-
            tion Funds              .65%
</TABLE>
 
 
               For providing or procuring administrative services to the Funds
            as described above, the Administrator receives monthly fees from
            each Fund at an annual rate based on the average daily net assets
            attributable in the aggregate to the Fund's Class A, Class B and
            Class C shares as follows:
 
 
<TABLE>
<CAPTION>
                                 ADMINISTRATIVE
           FUND                  FEE RATE
           ---------------------------------------------------------------
           <S>                   <C>
           Precious Metals Fund  .45% of first $2.5 billion
                                 .40% of amounts in excess of $2.5 billion
           ---------------------------------------------------------------
           International Fund    .65% of first $2.5 billion
                                 .60% of amounts in excess of $2.5 billion
           ---------------------------------------------------------------
           All Other Funds       .40% of first $2.5 billion
                                 .35% of amounts in excess of $2.5 billion
</TABLE>
 
               The investment advisory, administration and sub-administration
            agreements for the Funds may be terminated by the Trustees, or by
            PIMCO Advisors or Pacific Investment Management (as the case may
            be) on 60 days' written notice. In addition, these agreements may
            be terminated with regard to the Renaissance, Growth, Target, Op-
            portunity, International, Innovation and Precious Metals Funds by
            a majority of the Trustees that are not interested persons
 

                                                November 1, 1998 Prospectus   67
<PAGE>
 

            of the Trust, PIMCO Advisors, or Pacific Investment Management (as
            the case may be) on 60 days' written notice. Following their ini-
            tial terms, the agreements will continue from year-to-year if ap-
            proved by the Trustees.
               Pursuant to the portfolio management agreements between the Ad-
            viser and each of the Portfolio Managers, PIMCO Advisors (and not
            the Funds or the Trust) pays each Portfolio Manager a fee based on
            a percentage of the average daily net assets of a Fund as follows:
            Columbus Circle--.38% for the Renaissance Fund, .34% for the
            Growth Fund, .36% for the Target Fund, .48% for the Opportunity
            Fund and .38% for the Innovation Fund; Cadence--.35% for the Capi-
            tal Appreciation Fund, .35% for the Mid-Cap Growth Fund and .35%
            for the portion of the Common Stock Segment of the Balanced Fund
            allocated to Cadence; NFJ--.35% for the Equity Income Fund, .35%
            for the Value Fund, .40% for the Value 25 Fund, .50% for the
            Small-Cap Value Fund and .35% for the portion of the Common Stock
            Segment of the Balanced Fund allocated to NFJ; Blairlogie--.40%
            for the International Fund; Pacific Investment Management-- .25%
            for the Fixed Income Securities Segment of the Balanced Fund; Par-
            ametric--.35% for the Tax-Efficient Equity Fund; and Van Eck--.35%
            for the Precious Metals Fund.
 
PORTFOLIO   Pursuant to the portfolio management agreements, a Portfolio Man-
TRANSACTIONSager places orders for the purchase and sale of portfolio invest-
            ments for a Fund's accounts with brokers or dealers selected by it
            in its discretion. In effecting purchases and sales of portfolio
            securities for the accounts of the Funds, the Portfolio Managers
            will seek the best price and execution of the Fund's orders. In
            doing so, a Fund may pay higher commission rates than the lowest
            available when the Portfolio Manager believes it is reasonable to
            do so in light of the value of the brokerage and research services
            provided by the broker effecting the transaction. The Portfolio
            Managers also may consider sales of shares of the Trust as a fac-
            tor in the selection of broker-dealers to execute portfolio trans-
            actions for the Trust.
               Some securities considered for investment by the Funds may also
            be appropriate for other clients served by the Portfolio Managers.
            If a purchase or sale of securities consistent with the investment
            policies of a Fund and one or more of these clients served by a
            Portfolio Manager is considered at or about the same time, trans-
            actions in such securities will be allocated among the Fund and
            clients in a manner deemed fair and reasonable by the Portfolio
            Manager. Particularly when investing in less liquid or illiquid
            securities of smaller capitalization companies, such allocation
            may take into account the asset size of a Fund in determining
            whether the allocation of an investment is suitable. As a result,
            larger Funds may become more concentrated in more liquid securi-
            ties than smaller Funds or private accounts of a Portfolio Manager
            pursuing a small capitalization investment strategy, which could
            adversely affect performance. A Portfolio Manager may aggregate
            orders for the Funds with simultaneous transactions entered into
            on behalf of its other clients so long as price and transaction
            expense are averaged either for the particular transaction or for
            that day.
 
            Description of the Trust
 
CAPITALIZATION
            The Trust was organized as a Massachusetts business trust on Au-
            gust 24, 1990, and currently consists of twenty-eight portfolios
            that are operational, fifteen of which are described in this Pro-
            spectus. Other portfolios may be offered by means of a separate
            prospectus. The Board of Trustees may establish additional portfo-
            lios in the future. The capitalization of the Trust consists of an
            unlimited number of shares of beneficial interest. When issued,
            shares of the Trust are fully paid, non-assessable and freely
            transferable.
               Under Massachusetts law, shareholders could, under certain cir-
            cumstances, be held liable for the obligations of the Trust. How-
            ever, the Second Amended and Restated Agreement and Declaration of
            Trust (the "Declaration of Trust") of the Trust disclaims share-
            holder liability for acts or obligations of the Trust and requires
            that notice of such disclaimer be given in each agreement, obliga-
            tion or instrument entered into or executed by the Trust or the
            Trustees. The Declaration of Trust also provides for indemnifica-
            tion out of a Fund's property for all loss and expense of any
            shareholder of that Fund held liable on account of being or having
            been a shareholder. Thus, the risk of a shareholder
 

68   PIMCO Funds: Multi-Manager Series
<PAGE>
 

            incurring financial loss on account of shareholder liability is
            limited to circumstances in which such disclaimer is inoperative
            or the Fund of which he or she is or was a shareholder is unable
            to meet its obligations, and thus should be considered remote.
 
MULTIPLE    In addition to Class A, Class B and Class C shares, certain Funds
CLASSES OF  also offer Class D, Institutional Class and Administrative Class
SHARES      shares through separate prospectuses. See "Alternative Purchase
            Arrangements." These other classes of shares of the Funds may have
            different sales charges and expense levels, which will affect per-
            formance accordingly. This Prospectus relates only to Class A,
            Class B and Class C shares of the Funds.
               Class A, Class B and Class C shares of each Fund represent in-
            terests in the assets of that Fund, and each class has identical
            dividend, liquidation and other rights and the same terms and con-
            ditions, except that expenses related to the distribution and
            shareholder servicing of Class A, Class B and Class C shares are
            borne solely by such class and each class may, at the Trustees'
            discretion, also pay a different share of other expenses, not in-
            cluding advisory or custodial fees or other expenses related to
            the management of the Trust's assets, if these expenses are actu-
            ally incurred in a different amount by that class, or if the class
            receives services of a different kind or to a different degree
            than the other classes. All other expenses are allocated to each
            class on the basis of the net asset value of that class in rela-
            tion to the net asset value of the particular Fund.
 
VOTING      Each class of shares of each Fund has identical voting rights, ex-
            cept that each class of shares has exclusive voting rights on any
            matter submitted to shareholders that relates solely to that
            class, and has separate voting rights on any matter submitted to
            shareholders in which the interests of one class differ from the
            interests of any other class. Each class of shares has exclusive
            voting rights with respect to matters pertaining to any Distribu-
            tion and Servicing Plan or agreement applicable only to that
            class. These shares are entitled to vote at meetings of sharehold-
            ers. Matters submitted to shareholder vote must be approved by
            each Fund separately except (i) when required by the 1940 Act
            shares shall be voted together and (ii) when the Trustees have de-
            termined that the matter does not affect all Funds, then only
            shareholders of the Fund or Funds affected shall be entitled to
            vote on the matter. All classes of shares of a Fund will vote to-
            gether, except with respect to a Distribution and Servicing Plan
            or agreement applicable to a class of shares or when a class vote
            is required as specified above or otherwise by the 1940 Act.
            Shares are freely transferable, are entitled to dividends as de-
            clared by the Trustees and, in liquidation of the Trust, are enti-
            tled to receive the net assets of their Fund, but not of the other
            Funds. The Trust does not generally hold annual meetings of share-
            holders and will do so only when required by law. Shareholders may
            remove Trustees from office by votes cast in person or by proxy at
            a meeting of shareholders or by written consent. Such a meeting
            will be called at the written request of the holders of 10% of the
            Trust's outstanding shares.
               Shares entitle their holders to one vote per share (with pro-
            portionate voting for fractional shares). As of October 13, 1998,
            the following were shareholders of record of at least 25% of the
            outstanding voting securities of the indicated Fund: PIMCO Advi-
            sors L.P. (Newport Beach, California), the Trust's investment ad-
            viser and administrator, with respect to the Tax-Efficient Equity
            and Value 25 Funds; and Merrill Lynch, Pierce, Fenner & Smith Inc.
            (Jacksonville, Florida) with respect to the Target Fund. To the
            extent a shareholder is also the beneficial owner of such shares,
            the shareholder may be deemed to control (as that term is defined
            in the 1940 Act) the Fund. As used in this Prospectus, the phrase
            "vote of a majority of the outstanding shares" of a Fund (or the
            Trust) means the vote of the lesser of: (1) 67% of the shares of
            the Fund (or the Trust) present at a meeting, if the holders of
            more than 50% of the outstanding shares are present in person or
            by proxy; or (2) more than 50% of the outstanding shares of the
            Fund (or the Trust).
 
            Mailings to Shareholders
 
            To reduce the volume of mail shareholders receive, it is antici-
            pated that only one copy of most Trust reports, such as the
            Trust's annual reports, will be mailed to a shareholder's house-
            hold (same surname, same address). A shareholder may call 1-800-
            426-0107 if additional shareholder reports are desired.
 

                                               November 1, 1998 Prospectus   69
<PAGE>
 
 
          ---------------------------------------------------------------------
PIMCO     INVESTMENT ADVISER AND ADMINISTRATOR
FUNDS:    PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA
MULTI-    92660
MANAGER   ---------------------------------------------------------------------
SERIES    PORTFOLIO MANAGERS
          Columbus Circle Investors, Cadence Capital Management, NFJ Invest-
          ment Group, Blairlogie Capital Management, Pacific Investment Man-
          agement Company, Parametric Portfolio Associates, Van Eck Associates
          Corporation
          ---------------------------------------------------------------------
          DISTRIBUTOR
          PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT
          06902
          ---------------------------------------------------------------------
          CUSTODIAN
          Investors Fiduciary Trust Company, 801 Pennsylvania, Kansas City, MO
          64105
          ---------------------------------------------------------------------
          SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT
          Shareholder Services, Inc., P.O. Box 5866, Denver, CO 80217
          ---------------------------------------------------------------------
          INDEPENDENT ACCOUNTANTS
          PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO 64105
          ---------------------------------------------------------------------
          LEGAL COUNSEL
          Ropes & Gray, One International Place, Boston, MA 02110
          ---------------------------------------------------------------------
          For further information about the PIMCO Funds, call 1-800-426-0107
          or visit our Web site at www.pimcofunds.com.
<PAGE>
 
                           PIMCO Funds is on the Web

                              www.pimcofunds.com

<TABLE> 
<S>                    <C>                                 <C>                                <C> 
A Partial List of      PIMCO Funds Distributors            
What's Available:      LLC is pleased to announce
                       the launch of its Web site.
Daily Manager          You and your financial advisor
Commentary             now have around-the-clock                     [ARTWORK]                         [ARTWORK]
                       access to the most timely and
Fund Manager Bios      comprehensive information
                       available on all of the PIMCO
Current and            Funds. In addition, the site        Investment Insight                 Resources
Historical Fund        includes daily commentary           The Investment Insight sec-        Our Resources section features
Performance            from our fund managers, with        tion provides an overview of       a variety of useful information,
                       insights on the economy and         six investment management          including:
Lipper Rankings        other factors affecting the         firms under the PIMCO              
                       stock and bond markets.             Advisors L.P. umbrella. You'll     [_] an on-line document library
Morningstar Ratings                                        find an explanation of each        with applications and forms
                                                           firm's investment process,         that you can view and print
Listing of Fund                                            biographies of the investment      
Porfolio Holdings                                          team, manager updates and          [_] a literature-by-mail "catalog,"
                                                           more.                              so you can order free materials
Risk Analysis                                                                                 
                             [ARTWORK]
Daily Share Prices                                                                            [_] information about our
                                                                                              convenient shareholder
Downloadable                                                                                  services, such as Auto-Invest,
Literature Section                                                                            Fund Link and our 24-Hour
                                                                                              Telephone Information System
On-line Literature     You'll find the site to be                  [ARTWORK]
Requests               informative and easy-to-use.                                           [_] a listing of the features and
                       It's divided into three                                                benefits of the retirement plans
Resources for          main sections: Investment                                              offered by PIMCO Funds
Investment             Insight, Fund Information and
Professionals          Resources. And there are            Fund Information                   [_] a feature--"My Portfolio"--
                       several functions that can help     In the Fund Information            which enables you to track
                       you navigate your way around        section you'll access detailed     your portfolio (including
                       the site. We can be found           profiles of all the PIMCO          PIMCO Funds, other funds,
                       on the Worldwide Web at             Funds, including current and       stocks, futures and options),
                       www.pimcofunds.com.                 historical performance, Lipper     get detailed stock quotes and
                                                           rankings and Morningstar           more.
                                                           ratings. Additionally, we
                                                           provide a summary of a fund's      Questions?
                                                           portfolio--complete with           We're sure you'll find the
                                                           risk analysis data. You can        PIMCO Funds Web site to be 
                                                           also obtain daily fund share       an invaluable tool. If you have
                                                           prices. Please read the relevant   any questions about the site,
                                                           prospectus carefully before you    call us at 1-800-426-0107.
                                                           invest in any PIMCO Fund.          Or, use the e-mail feature of 
                                                                                              the site to contact us.

</TABLE> 

                                                           [LOGO OF PIMCO FUNDS]

<PAGE>
 
                       PIMCO FUNDS: MULTI-MANAGER SERIES
 
                       Supplement Dated November 1, 1998
                                    to the
                        Prospectus for Class A, Class B
                   and Class C Shares Dated November 1, 1998
 
                            Disclosure relating to
                    PIMCO INTERNATIONAL DEVELOPED FUND AND
                          PIMCO EMERGING MARKETS FUND
- --------------------------------------------------------------------------------
 THIS DOCUMENT SUPPLEMENTS THE PIMCO FUNDS: MULTI-MANAGER SERIES (THE
 "TRUST") PROSPECTUS FOR CLASS A, CLASS B AND CLASS C SHARES DATED
 NOVEMBER 1, 1998 (THE "RETAIL PROSPECTUS").
- --------------------------------------------------------------------------------

  In addition to the diversified investment portfolios described in the Retail
Prospectus, the Trust also offers Class A, Class B and Class C Shares of PIMCO
International Developed Fund and PIMCO Emerging Markets Fund (the "Funds").
Existing Class A, B and C shareholders of the Funds and participants in
certain qualified benefits plans that own Class A, B or C shares of the Funds
as of November 1, 1998 may purchase additional shares. Otherwise, Class A, B
and C shares of the Funds are not available for investment or exchanges. See
"Purchase, Redemption and Exchange Information" below.
 
1. SCHEDULE OF FEES (APPLICABLE TO BOTH FUNDS).
 
Shareholder Transaction Expenses:
 
<TABLE>
<CAPTION>
                                                         CLASS A CLASS B CLASS C
                                                         SHARES  SHARES  SHARES
                                                         ------- ------- -------
<S>                                                      <C>     <C>     <C>
Maximum initial sales charge imposed on purchases (as a
 percentage of offering price at time of purchase).....   5.50%   None    None
Maximum sales charge imposed on reinvested dividends
 (as a percentage of offering price at time of
 purchase).............................................    None   None    None
Maximum contingent deferred sales charge ("CDSC") (as a
 percentage of original purchase price) ...............    1%(1)  5%(2)   1%(3)
Exchange Fee...........................................    None   None    None
</TABLE>
- --------
1. Imposed only in certain circumstances where Class A shares are purchased
   without a front-end sales charge at the time of purchase. See "Alternative
   Purchase Arrangements" in the Retail Prospectus.
2. The maximum CDSC is imposed on shares redeemed in the first year. For
   shares held longer than one year, the CDSC declines according to the
   schedule set forth under "Alternative Purchase Arrangements--Deferred Sales
   Charge Alternative--Class B Shares" in the Retail Prospectus.
3. The CDSC on Class C shares is imposed only on shares redeemed in the first
   year.
<PAGE>
 
<TABLE>
<CAPTION>
CLASS A SHARES                                               EXAMPLE: You would pay
                                                             the following expenses  EXAMPLE: You would pay
                                                             on a $1,000 investment  the following expenses
                         ANNUAL FUND                         assuming (1) 5% annual  on a $1,000 investment
                         OPERATING EXPENSES                  return and (2)          assuming (1) 5% annual
                         (As a percentage of average net     redemption at the end   return and (2) no
                         assets):                            of each time period:    redemption:
- -----------------------------------------------------------  -----------------------------------------------
                                                   TOTAL
                                  ADMINI-          FUND
                         ADVISORY STRATIVE 12b-1   OPERATING 1    3     5     10    1    3     5     10
FUND                     FEES     FEES(1)  FEES(2) EXPENSES  YEAR YEARS YEARS YEARS YEAR YEARS YEARS YEARS
- ------------------------------------------------------------ -----------------------------------------------
<S>                      <C>      <C>      <C>     <C>       <C>  <C>   <C>   <C>   <C>  <C>   <C>   <C>
International Developed    .60%     .65%     .25%    1.50%   $69  $100  $132  $224  $69  $100  $132  $224
Emerging Markets           .85      .65      .25     1.75     72   107   145   250   72   107   145   250
</TABLE>
 
<TABLE>
<CAPTION>
CLASS B SHARES                                               EXAMPLE: You would pay
                                                             the following expenses  EXAMPLE: You would pay
                                                             on a $1,000 investment  the following expenses
                         ANNUAL FUND                         assuming (1) 5% annual  on a $1,000 investment
                         OPERATING EXPENSES                  return and (2)          assuming (1) 5% annual
                         (As a percentage of average net     redemption at the end   return and (2) no
                         assets):                            of each time period:    redemption:
- -----------------------------------------------------------  -----------------------------------------------
                                                   TOTAL
                                  ADMINI-          FUND
                         ADVISORY STRATIVE 12b-1   OPERATING 1    3     5     10    1    3     5     10
FUND                     FEES     FEES(1)  FEES(2) EXPENSES  YEAR YEARS YEARS YEARS YEAR YEARS YEARS YEARS
- ------------------------------------------------------------ -----------------------------------------------
<S>                      <C>      <C>      <C>     <C>       <C>  <C>   <C>   <C>   <C>  <C>   <C>   <C>
International Developed    .60%     .65%    1.00%    2.25%   $73  $100  $140  $230  $23   $70  $120  $230
Emerging Markets           .85      .65     1.00     2.50     75   108   153   256   25    78   133   256
</TABLE>
 
<TABLE>
<CAPTION>
CLASS C SHARES                                               EXAMPLE: You would pay
                                                             the following expenses  EXAMPLE: You would pay
                                                             on a $1,000 investment  the following expenses
                         ANNUAL FUND                         assuming (1) 5% annual  on a $1,000 investment
                         OPERATING EXPENSES                  return and (2)          assuming (1) 5% annual
                         (As a percentage of average net     redemption at the end   return and (2) no
                         assets):                            of each time period:    redemption:
- -----------------------------------------------------------  -----------------------------------------------
                                                   TOTAL
                                  ADMINI-          FUND
                         ADVISORY STRATIVE 12b-1   OPERATING 1    3     5     10    1    3     5     10
FUND                     FEES     FEES(1)  FEES(2) EXPENSES  YEAR YEARS YEARS YEARS YEAR YEARS YEARS YEARS
- ------------------------------------------------------------ -----------------------------------------------
<S>                      <C>      <C>      <C>     <C>       <C>  <C>   <C>   <C>   <C>  <C>   <C>   <C>
International Developed    .60%     .65%    1.00%    2.25%   $33   $70  $120  $258  $23   $70  $120  $258
Emerging Markets           .85      .65     1.00     2.50     35    78   133   284   25    78   133   284
</TABLE>
- --------
(1) The Administrative Fees for each Fund are subject to reduction to the
    extent that the average net assets attributable in the aggregate to the
    Fund's Class A, Class B and Class C shares exceed $2.5 billion. See
    "Management of the Trust--Advisory and Administrative Fees" below.
(2) 12b-1 fees which are equal to .25% represent servicing fees which are paid
    annually to the Distributor and repaid to participating brokers, certain
    banks and other financial intermediaries. 12b-1 fees which exceed .25%
    represent aggregate distribution and servicing fees. See "Distributor and
    Distribution and Servicing Plans" in the Retail Prospectus.
 
The purpose of the foregoing tables is to assist investors in understanding
the various costs and expenses of the Trust that are borne directly or
indirectly by Class A, Class B and Class C shareholders of the Funds. The
Examples for Class A shares assume payment of the current maximum applicable
sales load. Due to the 12b-1 distribution fee imposed on Class B and Class C
shares, a Class B or Class C shareholder of a Fund may, depending on the
length of time the shares are held, pay more than the economic equivalent of
the maximum front-end sales charges permitted by relevant rules of the
National Association of Securities Dealers, Inc.
 
NOTE: THE FIGURES SHOWN IN THE EXAMPLES ARE ENTIRELY HYPOTHETICAL. THEY ARE
NOT REPRESENTATIONS OF PAST OR FUTURE PERFORMANCE OR EXPENSES; ACTUAL
PERFORMANCE AND/OR EXPENSES MAY BE MORE OR LESS THAN SHOWN.
 
                                       2
<PAGE>
 
2. FINANCIAL HIGHLIGHTS.
 
  The following financial highlights present certain information and ratios as
well as performance information for the Funds. The information provided below
is included in the June 30, 1998 PIMCO Funds Annual Report (relating to Class
A, B and C shares) and has been audited by PricewaterhouseCoopers LLP,
independent accountants, whose report thereon is also included in such Annual
Report. The Annual Report is incorporated by reference in the Statement of
Additional Information and may be obtained without charge from the
Distributor. Financial Statements and related notes are also incorporated by
reference in the Statement of Additional Information.
 
<TABLE>
<CAPTION>
                                           NET REALIZED/ TOTAL                DIVIDENDS  DISTRIBUTIONS DISTRIBUTIONS 
                    NET ASSET NET          UNREALIZED   INCOME     DIVIDENDS  IN EXCESS  FROM NET      IN EXCESS    
SELECTED PER        VALUE     INVESTMENT   GAIN         FROM       FROM NET   OF NET     REALIZED      OF NET         DISTRIBUTIONS 
SHARE DATA FOR      BEGINNING INCOME       (LOSS) ON     NVESTMENT INVESTMENT INVESTMENT CAPITAL       REALIZED        FROM         
THE PERIOD ENDED:   OF PERIOD (LOSS)       INVESTMENTS   PERATIONS INCOME     INCOME     GAINS         CAPITAL GAINS   EQUALIZATION 
- ----------------------------------------------------------------------------------------------------------------------------------- 
<S>                 <C>       <C>           <C>          <C>        <C>        <C>        <C>           <C>            <C>          
INTERNATIONAL                                                                                                                 
 DEVELOPED FUND                                                                                                     
CLASS A                                                                                                                             
 06/30/98            $ 13.08    $ 0.18 (a)    $  1.68 (a) $  1.86    $ (0.10)    $ 0.00      $ (0.58)      $ 0.00          $ 0.00   
 01/20/97--06/30/97    11.71      0.09 (a)       1.28 (a)    1.37       0.00       0.00         0.00         0.00            0.00   
CLASS B                                                                                                                             
 06/30/98              13.06      0.01 (a)       1.71 (a)    1.72      (0.06)      0.00        (0.58)        0.00            0.00   
 01/20/97--06/30/97    11.71      0.06 (a)       1.29 (a)    1.35       0.00       0.00         0.00         0.00            0.00   
CLASS C                                                                                                                             
 06/30/98              13.06      0.02 (a)       1.71 (a)    1.73      (0.06)      0.00        (0.58)        0.00            0.00   
 01/20/97--06/30/97    11.71      0.06 (a)       1.29 (a)    1.35       0.00       0.00         0.00         0.00            0.00   
EMERGING MARKETS                                                                                                                    
 FUND                                                                                                                       
CLASS A                                                                                                                             
 06/30/98            $ 13.94    $ 0.03 (a)    $ (3.85)(a) $ (3.82)   $  0.00     $ 0.00      $  0.00       $ 0.00          $ 0.00 
 01/20/97--06/30/97    12.82      0.09 (a)       1.03 (a)    1.12       0.00       0.00         0.00         0.00            0.00   
CLASS B                                                                                                                             
 06/30/98              13.89     (0.06)(a)      (3.81)(a)   (3.87)      0.00       0.00         0.00         0.00            0.00   
 01/20/97--06/30/97    12.82      0.03 (a)       1.04 (a)    1.07       0.00       0.00         0.00         0.00            0.00   
CLASS C                                                                                                                             
 06/30/98              13.89     (0.06)(a)      (3.81)(a)   (3.87)      0.00       0.00         0.00         0.00            0.00   
 01/20/97--06/30/97    12.82      0.04 (a)       1.03 (a)    1.07       0.00       0.00         0.00         0.00            0.00 

</TABLE> 
 
<TABLE>
<CAPTION>
                                                                                             RATIO OF NET
                                                                                  RATIO OF   INVESTMENT
                         TAX BASIS               NET ASSET          NET ASSETS    EXPENSES   INCOME (LOSS) PORTFOLIO
SELECTED PER SHARE DATA  RETURN OF TOTAL         VALUE END TOTAL    END OF        TO AVERAGE TO AVERAGE    TURNOVER
FOR THE PERIOD ENDED:    CAPITAL   DISTRIBUTIONS OF PERIOD RETURN   PERIOD (000S) NET ASSETS NET ASSETS    RATE
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>           <C>       <C>      <C>           <C>        <C>           <C>
INTERNATIONAL DEVELOPED
 FUND
CLASS A
 06/30/98                 $ 0.00      $ (0.68)    $ 14.26   15.49 %    $ 1,061       1.57%        1.38%        60%
 01/20/97--06/30/97         0.00         0.00       13.08   11.70          318       1.54*        1.74*        77
CLASS B
 06/30/98                   0.00        (0.64)      14.14   14.32        2,902       2.25         0.08         60
 01/20/97--06/30/97         0.00         0.00       13.06   11.53        1,123       2.28*        1.08*        77
CLASS C
 06/30/98                   0.00        (0.64)      14.15   14.38        6,363       2.25         0.19         60
 01/20/97--06/30/97         0.00         0.00       13.06   11.53        2,526       2.28*        1.07*        77
EMERGING MARKETS FUND
CLASS A
 06/30/98                 $ 0.00      $  0.00     $ 10.12  (27.40)%    $   426       1.78%        0.25%        52%
 01/20/97--06/30/97         0.00         0.00       13.94    8.74          214       1.89*        1.52*        74
CLASS B
 06/30/98                   0.00         0.00       10.02  (27.86)         384       2.54        (0.51)        52
 01/20/97--06/30/97         0.00         0.00       13.89    8.35          308       2.62*        0.47*        74
CLASS C
 06/30/98                   0.00         0.00       10.02  (27.86)       1,169       2.54        (0.54)        52
 01/20/97--06/30/97         0.00         0.00       13.89    8.35        1,833       2.63*        0.66*        74
</TABLE>
- --------
 *  Annualized
(a) Per share amounts based upon average number of shares outstanding during
    the period.
 
                                       3
<PAGE>
 
3. INVESTMENT OBJECTIVES AND POLICIES.
 
  The investment objective and general investment policies of the Funds are
described below. There can be no assurance that the investment objective of
either Fund will be achieved. Because the market value of the Funds'
investments will change, the net asset value per share of the Funds also will
vary. The investment objective of each of the International Developed and
Emerging Markets Funds is fundamental and may not be changed without
shareholder approval by vote of a majority of the outstanding shares of the
Fund.
 
  INTERNATIONAL DEVELOPED FUND seeks long-term growth of capital. The Fund
invests primarily in a diversified portfolio of international equity
securities. The Morgan Stanley Capital International EAFE (Europe,
Australasia, Far East) Index ("EAFE Index") is used as a basis for choosing
the countries in which the Fund invests. However, the Fund is not limited to
the countries and weightings of the EAFE Index. Under normal market
conditions, the Fund will invest no more than 35% of its assets in securities
issued by companies located in countries that the Portfolio Manager
determines, on the basis of market capitalization, liquidity, and other
considerations, to have underdeveloped securities markets. The Portfolio
Manager applies two levels of screening in selecting investments for the Fund.
First, an active country selection model analyzes world markets and assigns a
relative value ranking, or "favorability weighting," to each country in the
relevant country universe to determine markets which are relatively
undervalued. Second, at the stock selection level, quality analysis and value
analysis are applied to each security, assessing variables such as balance
sheet strength and earnings growth (quality factors) and performance relative
to the industry, price to earnings ratios, and price to book ratios (value
factors). This two-level screening method identifies undervalued securities
for purchase and also provides a sell discipline for fully valued securities.
In selecting securities, the Portfolio Manager considers, to the extent
practicable and on the basis of information available to it for research, a
company's environmental business practices.
 
  For purposes of allocating the Fund's investments, a company is considered
to be located in the country in which it is domiciled, in which it is
primarily traded, from which it derives a significant portion of its revenues,
or in which a significant portion of its goods or services are produced.
 
  Most of the international equity securities in which the Fund invests will
be traded in foreign currencies. The Fund may engage in foreign currency
transactions to protect itself against fluctuations in currency exchange rates
in relation to the U.S. dollar or to the weighting of a particular foreign
currency on the EAFE Index. Such foreign currency transactions may include
forward foreign currency contracts, foreign exchange futures contracts, and
options thereon, currency exchange transactions on a spot (i.e., cash) basis,
and put and call options on foreign currencies. Up to 10% of the Fund's assets
may be invested in the securities of other investment companies. The Fund may
sell (write) call and put options. The Fund may utilize stock index futures
contracts and options thereon for hedging purposes and also for investment
purposes. For instance, the Fund may invest in stock index futures contracts
and related options as an alternative to purchasing individual stocks to
adjust its exposure to a particular foreign market. See "Characteristics and
Risks of Securities and Investment Techniques--Derivative Instruments--Index
Futures" in the Retail Prospectus. The Fund may also engage in equity index
swap transactions.
 
  Investing in the securities of foreign issuers involves special risks and
considerations not typically associated with investing in U.S. companies. For
a discussion of such risks, see "Characteristics and Risks of Securities and
Investment Techniques--Foreign Securities" in the Retail Prospectus.
 
  Currently, the Portfolio Manager for the International Developed Fund is
Blairlogie Capital Management ("Blairlogie"). It is anticipated that the
International Developed Fund will reorganize as a series of another mutual
fund family on or before March 31, 1999 and thereafter would not be offered as
a series of the Trust. Please see the Note under "Management of the Trust"
below for details.
 
  EMERGING MARKETS FUND seeks long-term growth of capital. The Fund invests
primarily in common stocks of companies located in countries identified as
emerging market countries. The Morgan Stanley Capital
 
                                       4
<PAGE>
 
International Emerging Markets Free Index ("MSCI Free Index") and the
International Finance Corporation Emerging Markets Index ("IFC Index") are
used as the bases for choosing the countries in which the Fund invests.
However, the Fund is not limited to the countries and weightings of these
indexes. The Portfolio Manager applies two levels of screening in selecting
investments for the Fund. First, an active country selection model analyzes
world markets and assigns a relative value ranking, or "favorability
weighting," to each country in the relevant country universe to determine
markets which are relatively undervalued. Second, at the stock selection
level, quality analysis and value analysis are applied to each security,
assessing variables such as balance sheet strength and earnings growth
(quality factors), and performance relative to the industry, price to earnings
ratios, and price to book ratios (value factors). This two-level screening
method identifies undervalued securities for purchase as well as provides a
sell discipline for fully valued securities. In selecting securities, the
Portfolio Manager considers, to the extent practicable and on the basis of
information available to it for research, a company's environmental business
practices.
 
  For purposes of implementing its investment objective, the Fund invests
primarily in some or all of the following emerging market countries (this list
is not exclusive):
 
  Argentina       Greece          Jordan          Poland          Sri Lanka
  Brazil          Hong Kong       Malaysia        Portugal        Taiwan
  Chile           Hungary         Mexico          Romania         Thailand
  China           India           Pakistan        Russia          Turkey
  Colombia        Indonesia       Peru            South Africa    Venezuela
  Czech Republic  Israel          Philippines     South Korea     Zimbabwe
 
  For purposes of allocating the Fund's investments, a company is considered
to be located in the country in which it is domiciled, in which it is
primarily traded, from which it derives a significant portion of its revenues,
or in which a significant portion of its goods or services are produced.
 
  Most of the foreign securities in which the Fund invests will be denominated
in foreign currencies. The Fund may engage in foreign currency transactions to
protect itself against fluctuations in currency exchange rates in relation to
the U.S. dollar or to the weighting of a particular foreign currency on the
MSCI Free Index or the IFC Index. Such foreign currency transactions may
include forward foreign currency contracts, foreign exchange futures
contracts, and options thereon, currency exchange transactions on a spot
(i.e., cash) basis, and put and call options on foreign currencies. Up to 10%
of the Fund's assets may be invested in the securities of other investment
companies. The Fund may sell (write) call and put options. The Fund may
utilize stock index futures contracts and options thereon for hedging purposes
and also for investment purposes. For instance, the Fund may invest in stock
index futures contracts and related options as an alternative to purchasing
individual stocks to adjust its exposure to a particular foreign market. See
"Characteristics and Risks of Securities and Investment Techniques--Derivative
Instruments--Index Futures" in the Retail Prospectus. The Fund may also engage
in equity index swap transactions.
 
  Investing in the securities of foreign issuers, and particularly emerging
market issuers, involves special risks and considerations not typically
associated with investing in U.S. companies. For a discussion of such risks,
see "Characteristics and Risks of Securities and Investment Techniques--
Foreign Securities" in the Retail Prospectus.
 
  Currently, the Portfolio Manager for the Emerging Markets Fund is
Blairlogie. It is anticipated that the Emerging Markets Fund will reorganize
as a series of another mutual fund family on or before March 31, 1999 and
thereafter would not be offered as a series of the Trust. Please see the Note
under "Management of the Trust" below for details.
 
  Stock Funds. The International Developed and Emerging Markets Funds are each
"Stock Funds" as described in the Retail Prospectus. Each Fund will invest
primarily (normally at least 65% of its assets) in common stock. Each Fund may
maintain a portion of its assets, which will usually not exceed 10%, in U.S.
 
                                       5
<PAGE>
 
Government securities, high quality debt securities (whose maturity or
remaining maturity will not exceed five years), money market obligations, and
in cash to provide for payment of the Fund's expenses and to meet redemption
requests. It is the policy of the Funds to be as fully invested in common
stocks as practicable at all times. This policy precludes the Funds from
investing in debt securities as a defensive investment posture (although the
Funds may invest in such securities to provide for payment of expenses and to
meet redemption requests). Accordingly, investors in the Funds bear the risk
of general declines in stock prices and the risk that a Fund's exposure to
such declines cannot be lessened by investment in debt securities. The Funds
may also invest in convertible securities, preferred stocks, and warrants,
subject to certain limitations.
 
4.  CHARACTERISTICS AND RISKS OF SECURITIES AND INVESTMENT TECHNIQUES.
 
  The Funds may invest in the securities and utilize the investment techniques
described under the following sub-headings of "Characteristics and Risks of
Securities and Investment Techniques" in the Retail Prospectus and are subject
to the attendant risks described: "Investment in Companies with Small and
Medium Market Capitalizations," "Foreign Securities," "Foreign Currency
Transactions," "Money Market Instruments," "Convertible Securities,"
"Derivative Instruments" (including "Options on Securities, Securities
Indexes, and Currencies," "Swap Agreement" (for the Emerging Markets Fund
only), "Futures Contracts and Options on Futures Contracts" and "Index
Futures"), "Loans of Portfolio Securities," "Short Sales," "When-Issued,
Delayed Delivery and Forward Commitment Transactions," "Repurchase
Agreements," "Reverse Repurchase Agreements and Other Borrowings," "Illiquid
Securities," and "Investment in Investment Companies." The Emerging Markets
Fund may enter into equity index swap agreements for purposes of gaining
exposure to the stocks making up an index of securities without actually
purchasing those stocks. Each Fund is subject to the risks described under
"Service Systems--Year 2000 Problem" in the Retail Prospectus.
 
  The Emerging Markets Fund is particularly sensitive to the risks associated
with investing in the securities of issuers based in "emerging market"
countries as described under "Foreign Securities" in the Retail Prospectus.
The Emerging Markets Fund is also subject to the risks described under
"Foreign Securities--Special Risks of Investing in Russian and Other Eastern
European Securities" in the Retail Prospectus.
 
  The annual portfolio turnover rates for the Funds were as follows for fiscal
1998 and 1997, respectively: International Developed Fund--60% and 77%;
Emerging Markets Fund--52% and 74%.
 
5.  PURCHASE, REDEMPTION AND EXCHANGE INFORMATION.
 
  Please see "How to Buy Shares," "Alternative Purchase Arrangements,"
"Exchange Privilege" and "How to Redeem" in the Retail Prospectus for
information on purchase, redemption and exchange information for Class A,
Class B and Class C shares of the Funds.
 
  As of November 1, 1998, Class A, B and C shares of the International
Developed and Emerging Markets Funds are not available for purchase or
exchange by new investors. Existing Class A, B and C shareholders of the Funds
may purchase additional shares of the Funds. Also, participants in certain
self-directed qualified benefit plans that owned Class A, B or C shares of a
Fund as of November 1, 1998 for any single plan participant will be eligible
to direct the purchase of the Fund's Class A, B or C shares by their plan
account for so long as the plan continues to own Class A, B or C shares of the
Fund for any plan participant. It is anticipated that the Funds will
reorganize as series of another mutual fund family on or before March 31,
1999. Thereafter, shares of the Funds would not be available to any investor
for purchase from the Trust or for exchanges involving other PIMCO Funds.
Please see the Note under "Management of the Trust" below for details.
 
6.  MANAGEMENT OF THE TRUST.
 
  PIMCO Advisors L.P. ("PIMCO Advisors" or the "Adviser") serves as investment
adviser and administrator to the Funds. Please see "Management of the Trust--
Investment Adviser" and "Management of the Trust--Fund Administrator" in the
Retail Prospectus for a description of PIMCO Advisors.
 
 
                                       6
<PAGE>
 
  Blairlogie Capital Management ("Blairlogie") serves as the Portfolio Manager
of the Funds and James Smith of Blairlogie is primarily responsible for the
day-to-day management of each Fund. Please see "Management of the Trust--
Portfolio Managers--Blairlogie" in the Retail Prospectus for a description of
Blairlogie and biographical information about Mr. Smith.
 
NOTE: It is anticipated that PIMCO Advisors will sell substantially all of its
ownership interest in Blairlogie to Alleghany Asset Management, Inc. on or
before March 31, 1999 (the "Blairlogie Transaction"). The Blairlogie
Transaction is subject to a number of conditions, including approval by the
shareholders of the Emerging Markets and International Developed Funds. In
connection with the anticipated Blairlogie Transaction, it is proposed that
the Emerging Markets and International Developed Funds will transfer all of
their assets and liabilities to newly formed series of the Alleghany Funds to
be managed by Blairlogie. (The proposed transactions are referred to as
"Reorganizations"). The proposed Reorganizations are subject to a number of
conditions, including approval by the Trust's Board of Trustees and the
shareholders of the Emerging Markets and International Developed Funds. The
Retail Prospectus will be supplemented or revised if any of these events
involving Blairlogie and the Funds do not occur substantially in accordance
with the schedule outlined above.
 
  Advisory and Administrative Fees
 
  The Funds feature fixed advisory and administrative fees. For providing or
arranging for the provision of investment advisory services to the Funds,
PIMCO Advisors receives monthly Advisory Fees from the International Developed
Fund at the annual rate of 0.60%, and from the Emerging Markets Fund at the
annual rate of 0.85%, each based on the average daily net assets of the
relevant Fund. Pursuant to the portfolio management agreement between PIMCO
Advisors and Blairlogie, PIMCO Advisors (and not the Funds or the Trust) pays
Blairlogie fees at the annual rate of 0.50% based on the average daily net
assets of the International Developed Fund and 0.75% based on the average
daily net assets of the Emerging Markets Fund.
 
  For providing or procuring administrative services for the Funds, PIMCO
Advisors (in its capacity as Administrator) receives monthly Administrative
Fees from each Fund at the following annual rate based on the average daily
net assets attributable in the aggregate to the Fund's Class A, Class B and
Class C Shares: 0.65% of the first $2.5 billion and 0.60% of amounts in excess
of $2.5 billion.
 
7.  DISTRIBUTIONS.
 
  Net investment income from interest and dividends, if any, will be declared
and paid at least annually to shareholders of record by each of the
International Developed and Emerging Markets Funds.
 
                                       7
<PAGE>
 
 
 
 
Multi-Manager Series
 
BLAIRLOGIE CAPITAL MANAGEMENT
    PIMCO Emerging Markets Fund
    PIMCO International Developed Fund
    PIMCO International Fund
 
CADENCE CAPITAL MANAGEMENT
    PIMCO Capital Appreciation Fund
    PIMCO Mid-Cap Growth Fund
    PIMCO Micro-Cap Growth Fund
    PIMCO Small-Cap Growth Fund
 
COLUMBUS CIRCLE INVESTORS
    PIMCO Renaissance Fund
    PIMCO Core Equity Fund
    PIMCO Mid-Cap Equity Fund
    PIMCO Innovation Fund
    PIMCO International Growth Fund
 
NFJ INVESTMENT GROUP
    PIMCO Equity Income Fund
    PIMCO Value Fund
    PIMCO Value 25 Fund
    PIMCO Small-Cap Value Fund
 
PARAMETRIC PORTFOLIO ASSOCIATES
    PIMCO Enhanced Equity Fund
    PIMCO Structured Emerging Markets Fund
    PIMCO Tax-Efficient Structured Emerging Markets Fund
    PIMCO Tax-Efficient Equity Fund
 
MULTIPLE MANAGERS
    PIMCO Balanced Fund
 
                                                                      PROSPECTUS
 
- --------------------------------------------------------------------------------
 
                                                                November 1, 1998
<PAGE>
 
PIMCO Funds: Multi-Manager Series
Prospectus
November 1, 1998
 
PIMCO Funds: Multi-Manager Series (the "Trust"), formerly PIMCO Funds: Equity
Advisors Series, is an open-end series management investment company ("mutual
fund"). This Prospectus describes twenty-one separate diversified investment
portfolios (the "Funds") of the Trust. Each Fund has its own investment
objective and policies. The Trust is designed to provide access to the
professional investment management services offered by PIMCO Advisors L.P.
("PIMCO Advisors") and the Funds' Portfolio Managers.
 
This Prospectus describes two classes of shares which may be offered by each
Fund: the "Institutional Class" and the "Administrative Class." Through
separate prospectuses, certain Funds may offer up to four additional classes
of shares, Class A, Class B, Class C, and Class D shares. See "Other
Information--Multiple Classes of Shares."
 
This Prospectus sets forth concisely the information a prospective investor
should know before investing in the Funds. It should be read and retained for
ready reference to information about the Funds. Information about the
investment objective of each Fund, along with a detailed description of the
types of securities in which each Fund may invest, and of investment policies
and restrictions applicable to each Fund, are set forth in this Prospectus.
There can be no assurance that the investment objective of any Fund will be
achieved. Because the market value of the Funds' investments will change, the
investment returns and net asset value per share of each Fund will vary.
 
A Statement of Additional Information, dated November 1, 1998, as amended or
supplemented from time to time, containing additional and more detailed
information about the Funds, has been filed with the Securities and Exchange
Commission and is hereby incorporated by reference into this Prospectus. The
Securities and Exchange Commission maintains an Internet World Wide Web site
(at www.sec.gov) which contains the Statement of Additional Information,
materials that are incorporated by reference into this Prospectus and the
Statement of Additional Information, and other information about the Funds.
The Statement of Additional Information is available without charge and may be
obtained by writing or calling:
 
                     PIMCO Funds
                     840 Newport Center Drive, Suite 300
                     Newport Beach, CA 92660
                     Telephone: 1-800-927-4648
                                1-800-987-4626 (PIMCO Infolink Audio Response
                                                Network).
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY FINANCIAL INSTITUTION, AND THE SHARES ARE NOT FEDERALLY
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE
BOARD, OR ANY OTHER AGENCY, AND INVOLVE RISK, INCLUDING THE POSSIBLE LOSS OF
PRINCIPAL.


2    PIMCO Funds: Multi-Manager Series
<PAGE>
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
   <S>                                                                      <C>
   Prospectus Summary......................................................   4
   Expense Information.....................................................   8
   Financial Highlights....................................................  10
   Investment Objectives and Policies......................................  16
   Investment Restrictions.................................................  29
   Characteristics and Risks of Securities and Investment Techniques.......  32
   Management of the Trust.................................................  46
   Purchase of Shares......................................................  52
   Redemption of Shares....................................................  56
   Portfolio Transactions..................................................  59
   Net Asset Value.........................................................  60
   Dividends, Distributions and Taxes......................................  61
   Other Information.......................................................  62
</TABLE>


                                                November 1, 1998 Prospectus   3
<PAGE>
 
                               PROSPECTUS SUMMARY
 
  PIMCO Funds: Multi-Manager Series (the "Trust") is an open-end management
investment company ("mutual fund") organized as a Massachusetts business trust
on August 24, 1990. This Prospectus describes twenty-one separate diversified
investment portfolios (the "Funds") offered by the Trust.
 
                              COMPARISON OF FUNDS
 
  The following chart provides general information about each of the Funds. It
is qualified in its entirety by the more complete descriptions of the Funds
appearing elsewhere in this Prospectus.
 
PORTFOLIO MANAGER
AND FUND               INVESTMENT OBJECTIVE AND PRIMARY INVESTMENTS
- --------------------------------------------------------------------------------
 
BLAIRLOGIE CAPITAL
MANAGEMENT
 
 Emerging Markets      Seeks long-term growth of capital; invests primarily in
                       common stocks of companies located in emerging market
                       countries.
- --------------------------------------------------------------------------------
 International         Seeks long-term growth of capital; invests primarily in
 Developed             a diversified portfolio of international equity
                       securities.
- --------------------------------------------------------------------------------
 International         Seeks capital appreciation, income is incidental;
                       invests primarily in common stocks of non-U.S. issuers.
- --------------------------------------------------------------------------------
 
CADENCE CAPITAL
MANAGEMENT
 
 Capital               Seeks growth of capital; invests primarily in common
 Appreciation          stocks of companies with market capitalizations of at
                       least $1 billion that have improving fundamentals and
                       whose stock is reasonably valued by the market.
- --------------------------------------------------------------------------------
 Mid-Cap Growth        Seeks growth of capital; invests primarily in common
                       stocks of companies with market capitalizations in
                       excess of $500 million that have improving fundamentals
                       and whose stock is reasonably valued by the market.
- --------------------------------------------------------------------------------
 Micro-Cap Growth      Seeks long-term growth of capital; invests primarily in
                       common stocks of companies with market capitalizations
                       of less than $100 million that have improving
                       fundamentals and whose stock is reasonably valued by the
                       market.
- --------------------------------------------------------------------------------
 Small-Cap Growth      Seeks growth of capital; invests primarily in common
                       stocks of companies with market capitalizations between
                       $50 million and $1 billion that have improving
                       fundamentals and whose stock is reasonably valued by the
                       market.
- --------------------------------------------------------------------------------
 
COLUMBUS CIRCLE
INVESTORS
 
 Renaissance           Seeks long-term growth of capital and income; invests
                       primarily in common stocks with below-average valuations
                       that have improving business fundamentals.
- --------------------------------------------------------------------------------
 Core Equity           Seeks long-term growth of capital, with income as a
                       secondary objective; invests primarily in common stocks
                       of companies with market capitalizations in excess of $3
                       billion.
- --------------------------------------------------------------------------------
 Mid-Cap Equity        Seeks long-term growth of capital; invests primarily in
                       common stocks of companies with market capitalizations
                       between $800 million and $3 billion.
- --------------------------------------------------------------------------------
 Innovation            Seeks capital appreciation; invests primarily in common
                       stocks of technology-related companies.
- --------------------------------------------------------------------------------
 International         Seeks long-term capital appreciation; invests primarily
 Growth                in an international portfolio of equity and equity-
                       related securities.
 
                                       (CONTINUED ON NEXT PAGE)


4    PIMCO Funds: Multi-Manager Series
<PAGE>
 
                         PROSPECTUS SUMMARY (CONTINUED)
                        COMPARISON OF FUNDS (CONTINUED)
PORTFOLIO MANAGER 
AND FUND               INVESTMENT OBJECTIVE AND PRIMARY INVESTMENTS
- --------------------------------------------------------------------------------
 
NFJ INVESTMENT GROUP
 Equity Income         Seeks current income as a primary investment objective,
                       and long-term growth of capital as a secondary
                       objective; invests primarily in common stocks with
                       below-average price to earnings ratios and higher
                       dividend yields relative to their industry groups.
- --------------------------------------------------------------------------------
 Value                 Seeks long-term growth of capital and income; invests
                       primarily in common stocks with below-average price to
                       earnings ratios relative to their industry groups.
- --------------------------------------------------------------------------------
 Value 25              Seeks long-term growth of capital and income; invests
                       primarily in approximately 25 common stocks with medium
                       market capitalizations and that have below-average price
                       to earnings ratios relative to their industry groups.
- --------------------------------------------------------------------------------
 Small-Cap Value       Seeks long-term growth of capital and income; invests
                       primarily in common stocks of companies with market
                       capitalizations between $50 million and $1 billion and
                       below-average price to earnings ratios relative to their
                       industry groups.
- --------------------------------------------------------------------------------
 
PARAMETRIC PORTFOLIO
ASSOCIATES
 
 Enhanced Equity       Seeks to provide a total return which equals or exceeds
                       the total return performance of an index representing
                       the performance of a reasonably broad spectrum of common
                       stocks (currently the Standard & Poor's 500 Composite
                       Stock Price Index (the "S&P 500")); invests primarily in
                       common stocks represented in the S&P 500.
- --------------------------------------------------------------------------------
 Structured            Seeks long-term growth of capital; invests primarily in
 Emerging Markets      common stocks of companies located in emerging market
                       countries.
- --------------------------------------------------------------------------------
 Tax-Efficient         Has the same investment objective and policies as the
 Structured            Structured Emerging Markets Fund, except that the Fund
 Emerging Markets      seeks to achieve superior after-tax returns for
                       shareholders by employing a variety of tax-efficient
                       management strategies.
- --------------------------------------------------------------------------------
 Tax-Efficient         Seeks maximum after-tax growth of capital; invests
 Equity                primarily in a broadly diversified portfolio of at least
                       200 common stocks of companies with larger market
                       capitalizations.
- --------------------------------------------------------------------------------
 
MULTIPLE MANAGERS
 Balanced              Seeks total return consistent with prudent investment
                       management; invests in common stocks, fixed income
                       securities and money market instruments.
- --------------------------------------------------------------------------------
 
                      INVESTMENT RISKS AND CONSIDERATIONS
 
  The following are some of the primary risks relevant to an investment in the
Funds and to the securities in which the Funds invest. Investors should read
this Prospectus carefully for a more complete discussion of the risks relating
to an investment in the Funds. The value of all securities and other
instruments held by the Funds vary from time to time in response to a wide
variety of market factors. Consequently, the net asset value per share of each
Fund will vary. The net asset value per share of any Fund may be less at the
time of redemption than it was at the time of investment. Except for the
Balanced Fund, all of the Funds invest primarily in common stock or other types
of equity securities (the "Stock Funds"). Each of the International,
Renaissance, Innovation, and International Growth Funds may invest a portion of
its assets in debt securities and may invest up to 100% of its assets in money
market instruments for temporary defensive purposes. It is the policy of the
other Stock Funds to be as fully invested as practicable in common stock. These
other Stock Funds may not invest in debt securities as a defensive investment
posture (although they may invest in such securities to provide for payment of
expenses and to meet redemption requests), and, therefore, may be more
vulnerable to general declines in stock prices. For further information, see
"Investment Objectives and Policies--Stock Funds.


                                                November 1, 1998 Prospectus   5
<PAGE>
 
                         PROSPECTUS SUMMARY (CONTINUED)
 
  Certain of the Funds may invest in debt securities rated lower than Baa by
Moody's Investors Service, Inc. ("Moody's") or BBB by Standard & Poor's Ratings
Services ("S&P"). Such securities carry a high degree of credit risk and are
considered speculative by the major rating agencies. Certain Funds may invest
in securities of foreign issuers, which may be subject to additional risk
factors, including foreign currency and political risks, not applicable to
securities of U.S. issuers. Investments by certain Funds in securities of
issuers based in countries with developing economies may pose political,
currency, and market risks greater than, or in addition to, risks of investing
in foreign developed countries. Certain of the Funds' investment techniques may
involve a form of borrowing, which may tend to exaggerate the effect on net
asset value of any increase or decrease in the market value of a Fund's
portfolio and may require liquidation of portfolio positions when it is not
advantageous to do so.
 
  Certain Funds may (but are not required to) use derivative instruments,
including futures, options, options on futures, and swap agreements, for
hedging purposes or as part of their investment strategies. Use of these
instruments may involve certain costs and risks, including the risk that a Fund
could not close out a position when it would be most advantageous to do so, the
risk of an imperfect correlation between the value of the securities being
hedged and the value of the particular derivative instrument, and the risk that
unexpected changes in interest rates may adversely affect the value of a Fund's
investments in particular derivative instruments.
 
  The Funds offer their shares to both retail and institutional investors.
Institutional shareholders, some of whom also may be investment advisory
clients of PIMCO Advisors L.P. or its affiliates, may hold large positions in
certain of the Funds. Such shareholders may on occasion make large redemptions
of their holdings in the Funds to meet their liquidity needs, in connection
with strategic adjustments to their overall portfolio of investments, or for
other purposes. Large redemptions from some Funds could require liquidation of
portfolio positions when it is not most desirable to do so. Liquidation of
portfolio holdings also may cause a Fund to realize taxable capital gains.
 
                   INVESTMENT ADVISER AND PORTFOLIO MANAGERS
 
  PIMCO Advisors L.P. ("PIMCO Advisors" or the "Adviser") serves as investment
adviser to the Trust. PIMCO Advisors is one of the largest investment
management firms in the U.S. As of September 30, 1998, PIMCO Advisors and its
subsidiary partnerships had approximately $225.9 billion in assets under
management. Subject to the supervision of the Board of Trustees of the Trust,
the Adviser is responsible for the investment program for the Funds in
accordance with each Fund's investment objective, policies, and restrictions.
For all of the Funds, the Adviser has engaged its affiliates to serve as
Portfolio Managers. These affiliated Portfolio Managers, each of which is a
subsidiary partnership of PIMCO Advisors, are Blairlogie Capital Management
("Blairlogie"), Cadence Capital Management ("Cadence"), Columbus Circle
Investors ("Columbus Circle"), NFJ Investment Group ("NFJ"), Pacific Investment
Management Company ("Pacific Investment Management"), and Parametric Portfolio
Associates ("Parametric"). Under the supervision of PIMCO Advisors, the
Portfolio Managers make determinations with respect to the purchase and sale of
portfolio securities, and they place, in the names of the Funds, orders for
execution of the Funds' transactions. For the Balanced Fund, PIMCO Advisors
determines the allocation of the Fund's assets among common stock and fixed
income securities and reserves the right to allocate a portion of the Fund's
assets for investment in money market instruments and to manage the investment
of such assets. For its services, the Adviser receives fees based on the
average daily net assets of each Fund. The Portfolio Managers are compensated
by the Adviser out of its fees (not by the Trust). See "Management of the
Trust."
 
  On or before March 31, 1999, it is anticipated that PIMCO Advisors will sell
substantially all of its ownership interest in Blairlogie, PIMCO Advisors will
assume full portfolio management responsibility for the International Fund,


6    PIMCO Funds: Multi-Manager Series
<PAGE>
 
                         PROSPECTUS SUMMARY (CONTINUED)
and the Emerging Markets and International Developed Funds will reorganize as
series of another mutual fund family and thereafter would not be offered as
series of the Trust. See "Management of the Trust--Portfolio Managers--
Blairlogie."
 
                               PURCHASE OF SHARES
 
  This Prospectus describes two classes of shares of each Fund: the
"Institutional Class" and the "Administrative Class." Shares of the
Institutional Class are offered primarily for direct investment by
institutional investors (Institutional Class shares may also be offered through
certain financial intermediaries that charge their customers transaction or
other fees with respect to the customers' investments in the Funds). Shares of
the Administrative Class are offered primarily through employee benefit plan
alliances, broker-dealers and other intermediaries. Each Fund pays service
and/or distribution fees to such entities for services they provide to such
Fund's shareholders of that class. Administrative Class shares of certain Funds
are not currently available for investment.
 
  Except with respect to shares of the Structured Emerging Markets and Tax-
Efficient Structured Emerging Markets Funds, shares of the Institutional Class
and Administrative Class of the Funds are offered at the relevant next
determined net asset value with no sales charge or other fee. A "Fund
Reimbursement Fee" is normally charged on purchases of Institutional Class and
Administrative Class shares of the Structured Emerging Markets and Tax-
Efficient Structured Emerging Markets Funds equal to 1.00% of the net asset
value of the shares purchased. See "Purchase of Shares--Fund Reimbursement
Fees." The minimum initial investment for shares of either class is $5 million,
subject to certain exceptions described under "Purchase of Shares." Shares of
either class may also be offered to clients of the Adviser and its affiliates.
Shares of the Micro-Cap Growth and Small-Cap Growth Funds are normally not
available for purchase by new investors, although purchase orders may be
accepted in certain circumstances. Existing shareholders may continue to invest
in these Funds. In addition, Institutional Class and Administrative Class
shares of the Innovation Fund are not offered as of the date of this
Prospectus; however, investment opportunities in this Fund may be available in
the future. These restrictions may be changed or eliminated at any time at the
discretion of the Trust's Board of Trustees. See "Purchase of Shares." Also, as
noted above under "Investment Adviser and Portfolio Managers," it is
anticipated that the Emerging Markets and International Developed Funds will
reorganize as series of another mutual fund family on or before March 31, 1999,
and thereafter would not be offered as series of the Trust. See "Management of
the Trust--Portfolio Managers--Blairlogie."
 
                           REDEMPTIONS AND EXCHANGES
 
  Institutional Class and Administrative Class shares of each Fund may be
redeemed without cost (except as noted below) at the relevant net asset value
per share of the class of that Fund next determined after receipt of the
redemption request. The redemption price may be more or less than the purchase
price.
 
  Institutional Class and Administrative Class shares of any Fund may be
exchanged without cost (except as noted below) on the basis of relative net
asset values for shares of the same class of any other Fund or other series of
the Trust offered generally to the public, or for shares of the same class of a
series of PIMCO Funds: Pacific Investment Management Series, an affiliated
mutual fund family composed primarily of fixed income portfolios managed by
Pacific Investment Management. See "Redemption of Shares."
 
  A Fund Reimbursement Fee is normally charged on redemptions and exchanges
involving Institutional Class and Administrative Class shares of the Structured
Emerging Markets and Tax-Efficient Structured Emerging Markets Funds equal to
1.00% of the net asset value of the shares redeemed or exchanged. See
"Redemption of Shares."


                                                November 1, 1998 Prospectus   7
<PAGE>
 
                              EXPENSE INFORMATION
 
SHAREHOLDER TRANSACTION EXPENSES (INSTITUTIONAL CLASS AND ADMINISTRATIVE
CLASS):
 
<TABLE>
<S>                                                                      <C>
  Sales Load Imposed on Purchases....................................... None
  Sales Load Imposed on Reinvested Dividends............................ None
  Redemption Fee........................................................ None
  Exchange Fee.......................................................... None
  Fund Reimbursement Fee Imposed on Purchases, Redemptions and
   Exchanges:
   Structured Emerging Markets and Tax-Efficient Structured Emerging
    Markets Funds....................................................... 1.00%*
   All Other Funds...................................................... None
</TABLE>
 
   * Unless a waiver applies, investors are charged a "Fund Reimbursement Fee"
   in connection with purchases and redemptions involving Institutional Class
   and Administrative Class shares of the Structured Emerging Markets and Tax-
   Efficient Structured Emerging Markets Funds equal to 1.00% of the net asset
   value of the shares purchased or redeemed. The fee also applies to
   exchanges involving these Funds. See "Purchase of Shares--Fund
   Reimbursement Fees" and "Redemption of Shares."
 
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE DAILY NET ASSETS):
 
<TABLE>
<CAPTION>
                                               ADVISORY ADMINISTRATIVE  TOTAL
   INSTITUTIONAL CLASS SHARES                    FEE         FEE       EXPENSES
   --------------------------                  -------- -------------- --------
   <S>                                         <C>      <C>            <C>
   Emerging Markets Fund......................   0.85%       0.50%       1.35%
   International Developed Fund...............   0.60        0.50        1.10
   International Fund.........................   0.55        0.50        1.05
   Capital Appreciation Fund..................   0.45        0.25        0.70
   Mid-Cap Growth Fund........................   0.45        0.25        0.70
   Micro-Cap Growth Fund......................   1.25        0.25        1.50
   Small-Cap Growth Fund......................   1.00        0.25        1.25
   Renaissance Fund...........................   0.60        0.25        0.85
   Core Equity Fund...........................   0.57        0.25        0.82
   Mid-Cap Equity Fund........................   0.63        0.25        0.88
   Innovation Fund............................   0.65        0.25        0.90
   International Growth Fund..................   0.85        0.50        1.35
   Equity Income Fund.........................   0.45        0.25        0.70
   Value Fund.................................   0.45        0.25        0.70
   Value 25 Fund..............................   0.50        0.25        0.75
   Small-Cap Value Fund.......................   0.60        0.25        0.85
   Enhanced Equity Fund.......................   0.45        0.25        0.70
   Structured Emerging Markets Fund...........   0.45        0.50        0.95
   Tax-Efficient Structured Emerging Markets
    Fund......................................   0.45        0.50        0.95
   Tax-Efficient Equity Fund..................   0.45        0.25        0.70
   Balanced Fund..............................   0.45        0.25        0.70
</TABLE>
 
<TABLE>
<CAPTION>
                                                              SERVICE/
                                      ADVISORY ADMINISTRATIVE  12B-1    TOTAL
   ADMINISTRATIVE CLASS SHARES          FEE         FEE         FEE    EXPENSES
   ---------------------------        -------- -------------- -------- --------
   <S>                                <C>      <C>            <C>      <C>
   Emerging Markets Fund.............   0.85%       0.50%       0.25%    1.60%
   International Developed Fund......   0.60        0.50        0.25     1.35
   International Fund................   0.55        0.50        0.25     1.30
   Capital Appreciation Fund.........   0.45        0.25        0.25     0.95
   Mid-Cap Growth Fund...............   0.45        0.25        0.25     0.95
   Micro-Cap Growth Fund.............   1.25        0.25        0.25     1.75
   Small-Cap Growth Fund.............   1.00        0.25        0.25     1.50
   Renaissance Fund..................   0.60        0.25        0.25     1.10
   Core Equity Fund..................   0.57        0.25        0.25     1.07
   Mid-Cap Equity Fund...............   0.63        0.25        0.25     1.13
   Innovation Fund...................   0.65        0.25        0.25     1.15
   International Growth Fund.........   0.85        0.50        0.25     1.60
   Equity Income Fund ...............   0.45        0.25        0.25     0.95
   Value Fund........................   0.45        0.25        0.25     0.95
   Value 25 Fund.....................   0.50        0.25        0.25     1.00
   Small-Cap Value Fund..............   0.60        0.25        0.25     1.10
   Enhanced Equity Fund..............   0.45        0.25        0.25     0.95
   Structured Emerging Markets Fund..   0.45        0.50        0.25     1.20
   Tax-Efficient Structured Emerging
    Markets Fund.....................   0.45        0.50        0.25     1.20
   Tax-Efficient Equity Fund.........   0.45        0.25        0.25     0.95
   Balanced Fund.....................   0.45        0.25        0.25     0.95
</TABLE>
 
  For a more detailed discussion of the Funds' fees and expenses, see "Fund
Administrator," "Advisory and Administrative Fees," and "Service and
Distribution Fees" under the caption "Management of the Trust."


8    PIMCO Funds: Multi-Manager Series
<PAGE>
 
                        EXPENSE INFORMATION (CONTINUED)
 
EXAMPLE OF FUND EXPENSES:
  An investor would pay the following expenses on a $1,000 investment assuming
(1) a hypothetical 5% annual return and (2) redemption at the end of each time
period:
 
<TABLE>
<CAPTION>
   INSTITUTIONAL CLASS SHARES                   1 YEAR 3 YEARS 5 YEARS 10 YEARS
   --------------------------                   ------ ------- ------- --------
   <S>                                          <C>    <C>     <C>     <C>
   Emerging Markets Fund.......................  $14     $43     $74     $162
   International Developed Fund................   11      35      61      134
   International Fund..........................   11      33      58      128
   Capital Appreciation Fund...................    7      22      39       87
   Mid-Cap Growth Fund.........................    7      22      39       87
   Micro-Cap Growth Fund.......................   15      47      82      179
   Small-Cap Growth Fund.......................   13      40      69      151
   Renaissance Fund............................    9      27      47      105
   Core Equity Fund............................    8      26      46      101
   Mid-Cap Equity Fund.........................    9      28      49      108
   Innovation Fund.............................    9      29      50      111
   International Growth Fund...................   14      43      74      162
   Equity Income Fund..........................    7      22      39       87
   Value Fund..................................    7      22      39       87
   Value 25 Fund...............................    8      24      --       --
   Small-Cap Value Fund........................    9      27      47      105
   Enhanced Equity Fund........................    7      22      39       87
   Structured Emerging Markets Fund*...........   29      50      --       --
   Tax-Efficient Structured Emerging Markets
    Fund*......................................   29      50      --       --
   Tax-Efficient Equity Fund...................    7      22      --       --
   Balanced Fund...............................    7      22      39       87
<CAPTION>
   ADMINISTRATIVE CLASS SHARES                  1 YEAR 3 YEARS 5 YEARS 10 YEARS
   ---------------------------                  ------ ------- ------- --------
   <S>                                          <C>    <C>     <C>     <C>
   Emerging Markets Fund.......................  $16     $50     $87     $190
   International Developed Fund................   14      43      74      163
   International Fund..........................   13      41      71      157
   Capital Appreciation Fund...................   10      30      53      117
   Mid-Cap Growth Fund.........................   10      30      53      117
   Micro-Cap Growth Fund.......................   18      55      95      206
   Small-Cap Growth Fund.......................   15      47      82      179
   Renaissance Fund............................   11      35      61      134
   Core Equity Fund............................   11      34      59      131
   Mid-Cap Equity Fund ........................   12      36      62      137
   Innovation Fund.............................   12      37      63      140
   International Growth Fund...................   16      50      87      190
   Equity Income Fund..........................   10      30      53      117
   Value Fund..................................   10      30      53      117
   Value 25 Fund...............................   10      32      --       --
   Small-Cap Value Fund........................   11      35      61      134
   Enhanced Equity Fund........................   10      30      53      117
   Structured Emerging Markets Fund*...........   32      58      --       --
   Tax-Efficient Structured Emerging Markets
    Fund*......................................   32      58      --       --
   Tax-Efficient Equity Fund...................   10      30      --       --
   Balanced Fund...............................   10      30      53      117
</TABLE>
   * The Examples for the Structured Emerging Markets and Tax-Efficient
   Structured Emerging Markets Funds assume the payment of a Fund
   Reimbursement Fee both at the time of purchase and at the time of
   redemption even though such fees may be waived for certain investors. See
   "Purchase of Shares--Fund Reimbursement Fees" and "Redemption of Shares."
   Assuming there is no redemption at the end of the time periods listed, the
   Examples for 1 year and 3 years, respectively, for the Structured Emerging
   Markets and Tax-Efficient Structured Emerging Markets Funds would be as
   follows: Institutional Class Shares--$20 and $40; and Administrative Class
   Shares--$22 and $48.
 
  The above tables are provided to assist investors in understanding the
various expenses which may be borne directly or indirectly in connection with
an investment in the Funds. The information is based upon each Fund's current
fees and expenses. This example should not be considered a representation of
past or future expenses or performance. Actual expenses may be higher or lower
than those shown.

                                                November 1, 1998 Prospectus   9
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
The financial highlights set forth on the following pages present certain
information and ratios as well as performance information for the Funds that
were operational during the periods listed. Certain information provided below
is included in the June 30, 1998 PIMCO Funds Annual Report (relating to
Institutional Class and Administrative Class shares) and has been audited by
PricewaterhouseCoopers LLP, independent accountants, whose report thereon is
also included in such Annual Report. The Annual Report is incorporated by
reference in the Statement of Additional Information and may be obtained from
the Trust without charge. Financial statements and related notes are also
incorporated by reference in the Statement of Additional Information.The
International, Innovation, Value 25, Structured Emerging Markets, Tax-
Efficient Structured Emerging Markets, and Tax-Efficient Equity Funds did not
offer Institutional or Administrative Class Shares during the reporting
periods. Prior to November 1, 1995, the fiscal year end for each Fund listed
below was October 31.
  Selected data for a share outstanding throughout each period:
 
<TABLE>
<CAPTION>
                         NET ASSET                NET REALIZED/     TOTAL    DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
                           VALUE        NET         UNREALIZED   INCOME FROM  FROM NET  EXCESS OF NET   FROM NET
                         BEGINNING  INVESTMENT    GAIN (LOSS) ON INVESTMENT  INVESTMENT  INVESTMENT     REALIZED
                         OF PERIOD INCOME (LOSS)   INVESTMENTS   OPERATIONS    INCOME      INCOME     CAPITAL GAINS
- -------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>            <C>            <C>         <C>        <C>           <C>
EMERGING MARKETS FUND
 Institutional Class
  06/30/98                $13.96      $ 0.06 (a)      $(3.84)(a)   $(3.78)     $ 0.00      $ 0.00        $ 0.00
  06/30/97                 12.66        0.06 (a)        1.30 (a)     1.36       (0.06)       0.00          0.00
  11/01/95-06/30/96        11.27        0.03            1.40         1.43       (0.04)       0.00          0.00
  10/31/95                 16.53        0.07           (4.55)       (4.48)      (0.06)       0.00         (0.72)
  10/31/94                 12.27       (0.01)           4.45         4.44        0.00        0.00         (0.18)
  06/01/93-10/31/93        10.00        0.03            2.52         2.55       (0.02)       0.00         (0.26)
 Administrative Class
  06/30/98                 13.95        0.09 (a)       (3.90)(a)    (3.81)       0.00        0.00          0.00
  06/30/97                 12.63        0.00 (a)        1.32 (a)     1.32        0.00        0.00          0.00
  11/01/95-06/30/96        11.24        0.02 (a)        1.40 (a)     1.42       (0.03)       0.00          0.00
  10/31/95                 16.95        0.00           (4.95)       (4.95)      (0.05)       0.00         (0.71)
INTERNATIONAL DEVELOPED
 FUND (I)
 Institutional Class
  06/30/98                $13.12      $ 0.16 (a)      $ 1.73 (a)   $ 1.89      $(0.11)     $ 0.00        $(0.58)
  06/30/97                 12.54        0.10 (a)        1.09 (a)     1.19        0.00        0.00         (0.61)
  11/01/95-06/30/96        11.74        0.72            0.72         1.44       (0.07)      (0.36)        (0.21)
  10/31/95                 11.86        0.10            0.30         0.40       (0.09)       0.00         (0.43)
  10/31/94                 10.69        0.09            1.15         1.24       (0.03)       0.00         (0.04)
  06/08/93-10/31/93        10.00        0.05            0.69         0.74       (0.04)       0.00         (0.01)
 Administrative Class
  06/30/98                 13.05        0.17 (a)        1.69 (a)     1.86       (0.03)       0.00         (0.58)
  06/30/97                 12.51        0.06 (a)        1.09 (a)     1.15        0.00        0.00         (0.61)
  11/01/95-06/30/96        11.73        0.69 (a)        0.72 (a)     1.41       (0.07)      (0.35)        (0.21)
  11/30/94-10/31/95        11.21        0.02            1.01         1.03       (0.08)       0.00          0.43)
CAPITAL APPRECIATION
 FUND
 Institutional Class
  06/30/98                $21.19      $ 0.15 (a)      $ 6.59 (a)   $ 6.74      $(0.12)     $ 0.00        $(1.68)
  06/30/97                 18.10        0.24            5.08         5.32       (0.10)       0.00         (2.13)
  11/01/95-06/30/96        16.94        0.35            1.99         2.34       (0.15)       0.00         (1.03)
  10/31/95                 13.34        0.18            3.60         3.78       (0.18)       0.00          0.00
  10/31/94                 13.50        0.14           (0.12)        0.02       (0.14)       0.00         (0.04)
  10/31/93                 11.27        0.11            2.73         2.84       (0.11)       0.00         (0.50)
  10/31/92                 11.02        0.14            1.05         1.19       (0.14)       0.00         (0.72)
  03/08/91-10/31/91        10.00        0.09            1.02         1.11       (0.09)       0.00          0.00
 Administrative Class
  06/30/98                 21.16        0.10 (a)        6.55 (a)     6.65       (0.14)       0.00         (1.68)
  07/31/96-06/30/97        17.19        0.16            6.03         6.19       (0.09)       0.00         (2.13)
MID-CAP GROWTH FUND
 Institutional Class
  06/30/98                $20.28      $ 0.11 (a)      $ 5.11 (a)   $ 5.22      $(0.07)     $(0.01)       $(1.33)
  06/30/97                 19.44       (0.07)           5.25         5.18       (0.05)       0.00         (4.29)
  11/01/95-06/30/96        18.16        0.32            1.53         1.85       (0.14)       0.00         (0.43)
  10/31/95                 13.97        0.07            4.19         4.26       (0.07)       0.00          0.00
  10/31/94                 13.97        0.06            0.01         0.07       (0.06)       0.00         (0.01)
  10/31/93                 11.29        0.07            2.70         2.77       (0.07)       0.00         (0.02)
  10/31/92                 10.28        0.10            1.03         1.13       (0.10)       0.00          0.00
  08/26/91-10/31/91        10.00        0.02            0.27         0.29       (0.01)       0.00          0.00
 Administrative Class
  06/30/98                 20.24        0.05 (a)        5.08 (a)     5.13       (0.07)      (0.01)        (1.33)
  06/30/97                 19.44       (0.13)           5.25         5.12       (0.03)       0.00         (4.29)
  11/01/95-06/30/96        18.17        0.28            1.53         1.81       (0.11)       0.00         (0.43)
  11/30/94-10/31/95        13.31        0.03            4.85         4.88       (0.02)       0.00          0.00
</TABLE>
 
- --------
 *Annualized
 (a)Per share amounts based on average number of shares outstanding during the
    period.
 (i)Formerly the Blairlogie International Active Fund.

 
10    PIMCO Funds: Multi-Manager Series

<PAGE>
 
                        FINANCIAL HIGHLIGHTS (CONTINUED)
 
 
<TABLE>
<CAPTION>
                                                                                                      RATIO OF NET
DISTRIBUTIONS                                                                              RATIO OF    INVESTMENT
IN EXCESS OF   DISTRIBUTIONS TAX BASIS               NET ASSET               NET ASSETS   EXPENSES TO INCOME (LOSS)
NET REALIZED       FROM      RETURN OF     TOTAL     VALUE END                 END OF     AVERAGE NET  TO AVERAGE     PORTFOLIO
CAPITAL GAINS  EQUALIZATION   CAPITAL  DISTRIBUTIONS OF PERIOD TOTAL RETURN PERIOD (000S)   ASSETS     NET ASSETS   TURNOVER RATE
- ---------------------------------------------------------------------------------------------------------------------------------
<S>            <C>           <C>       <C>           <C>       <C>          <C>           <C>         <C>           <C>
    $0.00         $ 0.00       $0.00      $ 0.00      $10.18      (27.08)%    $ 24,251       1.39%         0.52%          52%
     0.00           0.00        0.00       (0.06)      13.96       10.85        52,703       1.45          0.45           74
     0.00           0.00        0.00       (0.04)      12.66       12.70        80,545       1.35*         0.84*          74
     0.00           0.00        0.00       (0.78)      11.27      (27.70)       73,539       1.35          0.57          118
     0.00           0.00        0.00       (0.18)      16.53       36.31        79,620       1.35         (0.06)          79
     0.00           0.00        0.00       (0.28)      12.27       25.55        14,625       1.34*         0.64*          37

     0.00           0.00        0.00        0.00       10.14      (27.31)        1,339       1.65          0.81           52
     0.00           0.00        0.00        0.00       13.95       10.45           117       1.69          0.02           74
     0.00           0.00        0.00       (0.03)      12.63       12.70           368       1.61*         0.18 *         74
     0.00           0.00        0.00       (0.76)      11.24      (27.96)          830       1.62          0.02          118

    $0.00         $ 0.00       $0.00      $(0.69)     $14.32       15.69%     $122,126       1.11%         1.20%          60%
     0.00           0.00        0.00       (0.61)      13.12       10.07        94,044       1.13          0.85           77
     0.00           0.00        0.00       (0.64)      12.54       12.54        70,207       1.10*         0.81*          60
     0.00           0.00        0.00       (0.52)      11.74        3.83        63,607       1.10          1.10           63
     0.00           0.00        0.00       (0.07)      11.86       11.68        22,569       1.10          1.12           89
     0.00           0.00        0.00       (0.05)      10.69        7.39         8,299       1.10*         0.91*          20

     0.00           0.00        0.00       (0.61)      14.30       15.33         6,299       1.36          1.31           60
     0.00           0.00        0.00       (0.61)      13.05        9.77         2,302       1.38          0.52           77
     0.00           0.00        0.00       (0.63)      12.51       12.33         5,624       1.35*         1.04*          60
     0.00           0.00        0.00       (0.51)      11.73        9.61           675       1.34*         0.50*          58

    $0.00         $ 0.00       $0.00      $(1.80)     $26.13       32.97%     $805,856       0.71%         0.64%          75%
     0.00           0.00        0.00       (2.23)      21.19       31.52       536,187       0.71          1.02           87
     0.00           0.00        0.00       (1.18)      18.10       14.65       348,728       0.70*         1.33*          73
     0.00           0.00        0.00       (0.18)      16.94       28.47       236,220       0.70          1.22           83
     0.00           0.00        0.00       (0.18)      13.34        0.15       165,441       0.70          1.17           77
     0.00           0.00        0.00       (0.61)      13.50       25.30        84,990       0.70          0.94           81
     0.00          (0.08)       0.00       (0.94)      11.27       10.75        36,334       0.70          1.13          134
     0.00           0.00        0.00       (0.09)      11.02       11.19        18,813       0.75*         1.55*          41

     0.00           0.00        0.00       (1.82)      25.99       32.55       132,384       0.96          0.39           75
     0.00           0.00        0.00       (2.22)      21.16       38.26         3,115       0.96*         0.66*          87

    $0.00         $ 0.00       $0.00      $(1.41)     $24.09       26.16%     $437,985       0.71%         0.46%          66%
     0.00           0.00        0.00       (4.34)      20.28       30.58       291,374       0.71          0.53           82
     0.00           0.00        0.00       (0.57)      19.44       10.37       231,011       0.70*         1.11*          79
     0.00           0.00        0.00       (0.07)      18.16       30.54       189,320       0.70          0.43           78
     0.00           0.00        0.00       (0.07)      13.97        0.58       121,791       0.70          0.45           61
     0.00           0.00        0.00       (0.09)      13.97       24.57        67,625       0.70          0.56           98
     0.00          (0.02)       0.00       (0.12)      11.29       10.91        21,213       0.70          0.87           66
     0.00           0.00        0.00       (0.01)      10.28        2.98         2,748       0.82*         0.92*          13

     0.00           0.00        0.00       (1.41)      23.96       25.75        73,614       0.95          0.22           66
     0.00           0.00        0.00       (4.32)      20.24       30.23         2,066       0.96          0.28           82
     0.00           0.00        0.00       (0.54)      19.44       10.17         1,071       0.95*         0.89*          79
     0.00           0.00        0.00       (0.02)      18.17       36.64           892       0.94*         0.23*          72
</TABLE>


                                               November 1, 1998 Prospectus   11
<PAGE>
 
                        FINANCIAL HIGHLIGHTS (CONTINUED)
 
<TABLE>
<CAPTION>
 
                       NET ASSET                NET REALIZED/     TOTAL    DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
                         VALUE        NET         UNREALIZED   INCOME FROM  FROM NET  EXCESS OF NET   FROM NET
                       BEGINNING  INVESTMENT    GAIN (LOSS) ON INVESTMENT  INVESTMENT  INVESTMENT     REALIZED
                       OF PERIOD INCOME (LOSS)   INVESTMENTS   OPERATIONS    INCOME      INCOME     CAPITAL GAINS
- -----------------------------------------------------------------------------------------------------------------
<S>                    <C>       <C>            <C>            <C>         <C>        <C>           <C>
MICRO-CAP GROWTH FUND
 Institutional Class
  06/30/98              $19.85      $(0.11)(a)      $ 6.54 (a)   $ 6.43      $0.00       $ 0.00        $(2.62)
  06/30/97               18.47        0.00            3.41         3.41       0.00         0.00         (2.03)
  11/01/95-06/30/96      15.38        0.00            3.43         3.43       0.00         0.00         (0.34)
  10/31/95               11.87       (0.04)           3.55         3.51       0.00         0.00          0.00
  10/31/94               11.06       (0.03)           0.84         0.81       0.00         0.00          0.00
  06/25/93-10/31/93      10.00        0.00            1.07         1.07       0.00         0.00          0.00
 Administrative Class
  06/30/98               19.78       (0.17)(a)        6.53 (a)     6.36       0.00         0.00         (2.62)
  06/30/97               18.46       (0.06)           3.41         3.35       0.00         0.00         (2.03)
  04/01/96-06/30/96      16.73        0.03            1.70         1.73       0.00         0.00          0.00
SMALL-CAP GROWTH FUND
 Institutional Class
  06/30/98              $13.40      $(0.03)(a)      $ 2.52 (a)   $ 2.49      $0.00       $ 0.00        $(1.88)
  06/30/97               20.83       (0.01)(a)        3.17 (a)     3.16       0.00         0.00        (10.59)
  11/01/95-06/30/96      21.02        2.02           (0.61)        1.41       0.00         0.00         (1.60)
  10/31/95               19.38       (0.05)           3.12         3.07       0.00         0.00         (1.43)
  10/31/94               19.15       (0.02)           0.89         0.87       0.00         0.00         (0.64)
  10/31/93               15.80       (0.06)           6.19         6.13       0.00         0.00         (2.78)
  10/31/92               14.87        0.01            1.50         1.51      (0.01)        0.00         (0.57)
  01/07/91-10/31/91      10.00        0.02            5.03         5.05      (0.02)        0.00         (0.16)
 Administrative Class
  06/30/98               13.41        0.07 (a)        2.51 (a)     2.44       0.00         0.00         (1.88)
  06/30/97               20.82       (0.06)(a)        3.24 (a)     3.18       0.00         0.00        (10.59)
  11/01/95-06/30/96      21.01        2.02 (a)       (0.61)(a)     1.41       0.00         0.00         (1.60)
  09/27/95-10/31/95      21.90       (0.02)          (0.87)       (0.89)      0.00         0.00          0.00
RENAISSANCE FUND
 Institutional Class
  12/31/97-06/30/98     $16.73      $ 0.05          $ 2.29       $ 2.34      $0.00       $ 0.00        $ 0.00
CORE EQUITY FUND
 Institutional Class
  06/30/98              $15.55      $ 0.03 (a)      $ 6.11 (a)   $ 6.14      $0.00       $ 0.00        $(1.30)
  06/30/97               13.55        0.03 (a)        2.78 (a)     2.81      (0.02)        0.00         (0.79)
  11/01/95-06/30/96      12.72        0.51            0.65         1.16      (0.04)       (0.01)        (0.28)
  12/28/94-10/31/95      10.00        0.07            2.71         2.78      (0.06)        0.00          0.00
 Administrative Class
  06/30/98               15.53        0.01 (a)        6.10 (a)     6.09       0.00         0.00         (1.30)
  06/30/97               13.56        0.00 (a)        2.77 (a)     2.77      (0.01)        0.00         (0.79)
  11/01/95-06/30/96      12.73        0.49            0.65         1.14      (0.02)       (0.01)        (0.28)
  05/31/95-10/31/95      11.45        0.02            1.28         1.30      (0.02)        0.00          0.00
MID-CAP EQUITY FUND
 Institutional Class
  06/30/98              $14.04      $(0.03)(a)      $ 3.61 (a)   $ 3.58      $0.00       $ 0.00        $(4.09)
  06/30/97               14.66       (0.06)(a)        1.31 (a)     1.25       0.00         0.00         (1.87)
  11/01/95-06/30/96      12.92        0.49            1.62         2.11       0.00         0.00         (0.37)
  12/28/94-10/31/95      10.00        0.02            2.92         2.94      (0.02)        0.00          0.00
 Administrative Class
  08/21/97-06/30/98      15.27       (0.05)(a)        2.37 (a)     2.32       0.00         0.00         (4.09)
INTERNATIONAL GROWTH
 FUND
 Institutional Class
  12/31/97-06/30/98     $10.00      $ 0.00 (a)      $ 3.55 (a)   $ 3.55      $0.00       $ 0.00        $ 0.00
</TABLE>
- --------
 *Annualized
  (a)Per share amounts based on average number of shares outstanding during
    the period.
 

12    PIMCO Funds: Multi-Manager Series

<PAGE>
 
                        FINANCIAL HIGHLIGHTS (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                                                      RATIO OF NET
DISTRIBUTIONS                                                                              RATIO OF    INVESTMENT
IN EXCESS OF   DISTRIBUTIONS TAX BASIS               NET ASSET               NET ASSETS   EXPENSES TO INCOME (LOSS)
NET REALIZED       FROM      RETURN OF     TOTAL     VALUE END                 END OF     AVERAGE NET  TO AVERAGE     PORTFOLIO
CAPITAL GAINS  EQUALIZATION   CAPITAL  DISTRIBUTIONS OF PERIOD TOTAL RETURN PERIOD (000s)   ASSETS     NET ASSETS   TURNOVER RATE
- ---------------------------------------------------------------------------------------------------------------------------------
<S>            <C>           <C>       <C>           <C>       <C>          <C>           <C>         <C>           <C>
    $0.00          $0.00       $0.00      $ (2.62)    $23.66      33.95%      $257,842       1.51%        (0.50)%         72%
     0.00           0.00        0.00        (2.03)     19.85      20.05        164,139       1.52         (0.49)          84
     0.00           0.00        0.00        (0.34)     18.47      22.64         83,973       1.50*        (0.45)*         54
     0.00           0.00        0.00         0.00      15.38      29.54         69,775       1.50         (0.37)          87
     0.00           0.00        0.00         0.00      11.87       7.31         32,605       1.50         (0.25)          59
     0.00           0.00       (0.01)       (0.01)     11.06      10.81         10,827       1.50*        (0.02)*         16
    
     0.00           0.00        0.00        (2.62)     23.52      33.70          4,779       1.76         (0.74)          72
     0.00           0.00        0.00        (2.03)     19.78      19.72          2,116       1.77         (0.74)          84
     0.00           0.00        0.00         0.00      18.46      10.34            566       1.73*        (0.74)*         54
   
    $0.00          $0.00       $0.00      $ (1.88)    $14.01      19.33%      $ 47,641       1.26%        (0.20)%         77%
     0.00           0.00        0.00       (10.59)     13.40      22.82         33,390       1.32         (0.05)         129
     0.00           0.00        0.00        (1.60)     20.83       7.22         32,954       1.25*        (0.20)*         59
     0.00           0.00        0.00        (1.43)     21.02      17.39         73,977       1.25         (0.27)          86
     0.00           0.00        0.00        (0.64)     19.38       4.62         50,425       1.25         (0.33)          66
     0.00           0.00        0.00        (2.78)     19.15      38.80         43,308       1.25         (0.35)          62
     0.00           0.00        0.00        (0.58)     15.80      10.20         33,734       1.25         0.09            66
     0.00           0.00        0.00        (0.18)     14.87      50.68         33,168       1.29*        0.11*           48
    
     0.00           0.00        0.00        (1.88)     13.97      18.90            981       1.49         (0.51)          77
     0.00           0.00        0.00       (10.59)     13.41      23.12              1       1.54         (0.36)         129
     0.00           0.00        0.00        (1.60)     20.82       7.18            112       1.50*        (0.41)*         59
     0.00           0.00        0.00         0.00      21.01      (5.34)           544       1.60*        (0.82)*          9

    $0.00          $0.00       $0.00      $  0.00     $19.07      13.99%      $    851       0.86%*       0.55%*         192%

    $0.00          $0.00       $0.00      $ (1.30)    $20.39      41.83%      $  1,915       0.83%        0.20%          120%
     0.00           0.00        0.00        (0.81)     15.55      21.59          6,444       0.87         0.23           139
     0.00           0.00        0.00        (0.33)     13.55       9.41         10,452       0.82*        0.53*           73
     0.00           0.00        0.00        (0.06)     12.72      27.86          7,791       0.82*        0.79*          123

     0.00           0.00        0.00        (1.30)     20.32      41.54        128,666       1.08         (0.07)         120
     0.00           0.00        0.00        (0.80)     15.53      21.20         29,332       1.13         (0.03)         139
     0.00           0.00        0.00        (0.31)     13.56       9.23         33,575       1.07*        0.28 *          73
     0.00           0.00        0.00        (0.02)     12.73      11.34         24,645       1.06*        0.34 *          58

    $0.00          $0.00       $0.00      $ (4.09)    $13.53      30.40%      $  8,488       0.89%        (0.25)%        268%
     0.00           0.00        0.00        (1.87)     14.04       9.61          7,591       1.15         (0.43)         202
     0.00           0.00        0.00        (0.37)     14.66      16.72          8,378       0.88*        (0.32)*         97
     0.00           0.00        0.00        (0.02)     12.92      29.34          8,357       0.88*        0.24 *         132

     0.00           0.00        0.00        (4.09)     13.50      19.65          2,371       1.13*        (0.49)*        268

    $0.00          $0.00       $0.00      $  0.00     $13.55      35.50%      $  6,822       1.36%*       0.08%*          60%
</TABLE>


                                               November 1, 1998 Prospectus   13
<PAGE>
 
                        FINANCIAL HIGHLIGHTS (CONTINUED)
 
<TABLE>
<CAPTION>
 
                      NET ASSET               NET REALIZED/     TOTAL    DIVIDENDS  DIVIDENDS IN  DISTRIBUTIONS
                        VALUE        NET        UNREALIZED   INCOME FROM  FROM NET  EXCESS OF NET   FROM NET
                      BEGINNING  INVESTMENT   GAIN (LOSS) ON INVESTMENT  INVESTMENT  INVESTMENT     REALIZED
                      OF PERIOD INCOME (LOSS)  INVESTMENTS   OPERATIONS    INCOME      INCOME     CAPITAL GAINS
- ---------------------------------------------------------------------------------------------------------------
<S>                   <C>       <C>           <C>            <C>         <C>        <C>           <C>
EQUITY INCOME FUND
 Institutional Class
  06/30/98             $15.41       $0.44 (a)     $ 2.75 (a)   $ 3.19      $(0.42)      $0.00        $(2.09)
  06/30/97              14.36        0.40           3.17         3.57       (0.55)       0.00         (1.97)
  11/01/95-06/30/96     13.09        0.78           1.31         2.09       (0.34)       0.00         (0.48)
  10/31/95              11.75        0.46           1.67         2.13       (0.46)       0.00         (0.33)
  10/31/94              11.95        0.42          (0.16)        0.26       (0.42)       0.00         (0.04)
  10/31/93              10.92        0.40           1.40         1.80       (0.40)       0.00         (0.37)
  10/31/92              10.77        0.45           0.93         1.38       (0.43)       0.00         (0.57)
  03/08/91-10/31/91     10.00        0.24           0.92         1.16       (0.24)       0.00         (0.15)
 Administrative Class
  06/30/98              15.40        0.40 (a)       2.75 (a)     3.15       (0.38)       0.00         (2.09)
  06/30/97              14.35        0.27           3.26         3.53       (0.51)       0.00         (1.97)
  11/01/95-06/30/96     13.13        0.75           1.31         2.06       (0.36)       0.00         (0.48)
  11/30/94-10/31/95     11.12        0.39           2.35         2.74       (0.40)       0.00         (0.33)
VALUE FUND (II)
 Institutional Class
  06/30/98             $14.81       $0.25 (a)     $ 2.47 (a)   $ 2.72      $(0.24)      $0.00        $(1.63)
  06/30/97              12.46        1.05           2.11         3.16       (0.31)       0.00         (0.50)
  11/01/95-06/30/96     12.53        0.25           1.62         1.87       (0.17)       0.00         (1.77)
  10/31/95              11.55        0.30           2.18         2.48       (0.30)       0.00         (1.20)
  10/31/94              11.92        0.30          (0.28)        0.02       (0.29)       0.00         (0.10)
  10/31/93              10.05        0.28           2.36         2.64       (0.28)       0.00         (0.49)
  12/30/91-10/31/92     10.00        0.24           0.23         0.47       (0.24)       0.00         (0.18)
 Administrative Class
  08/21/97-06/30/98     15.66        0.19 (a)       1.65 (a)     1.84       (0.22)       0.00         (1.63)
SMALL-CAP VALUE FUND
 Institutional Class
  06/30/98             $15.78       $0.29 (a)     $ 2.50 (a)   $ 2.79      $(0.13)      $0.00        $(0.76)
  06/30/97              14.20        0.46           3.63         4.09       (0.13)       0.00         (2.38)
  11/01/95-06/30/96     13.10        0.56           1.49         2.05       (0.21)       0.00         (0.74)
  10/31/95              12.07        0.28           1.92         2.20       (0.28)       0.00         (0.89)
  10/31/94              12.81        0.29          (0.65)       (0.36)      (0.29)       0.00         (0.09)
  10/31/93              10.98        0.24           2.33         2.57       (0.24)       0.00         (0.50)
  10/31/92              10.09        0.22           1.17         1.39       (0.22)       0.00         (0.24)
  10/01/91-10/31/91     10.00        0.02           0.10         0.12       (0.03)       0.00          0.00
 Administrative Class
  06/30/98              15.76        0.25 (a)       2.49 (a)     2.74       (0.11)       0.00         (0.76)
  06/30/97              14.20        0.38           3.68         4.06       (0.12)       0.00         (2.38)
  11/01/95-06/30/96     13.16        0.54           1.43         1.97       (0.19)       0.00         (0.74)
ENHANCED EQUITY FUND
 Institutional Class
  06/30/98             $16.46       $0.11 (a)     $ 3.91 (a)   $ 4.02      $(0.11)      $0.00        $(7.73)
  06/30/97              15.91        1.18           3.10         4.28       (0.10)       0.00         (3.63)
  11/01/95-06/30/96     14.44        0.34           1.67         2.01       (0.16)       0.00         (0.38)
  10/31/95              11.99        0.25           2.62         2.87       (0.25)       0.00         (0.17)
  10/31/94              12.08        0.25          (0.04)        0.21       (0.25)       0.00         (0.05)
  10/31/93              11.76        0.23           0.74         0.97       (0.23)       0.00         (0.42)
  10/31/92              10.80        0.16           1.06         1.22       (0.16)       0.00         (0.04)
  02/11/91-10/31/91     10.00        0.16           0.80         0.96       (0.16)       0.00          0.00
 Administrative Class
  08/21/97-06/30/98     17.53        0.05 (a)       2.85 (a)     2.90       (0.11)       0.00         (7.73)
BALANCED FUND (III)
 Institutional Class
  06/30/98             $11.42       $0.35 (a)     $ 1.81 (a)   $ 2.16      $(0.34)      $0.00        $(1.09)
  06/30/97              11.64        0.89           1.21         2.10       (0.36)       0.00         (1.96)
  11/01/95-06/30/96     11.89        0.27           0.76         1.03       (0.27)       0.00         (1.01)
  10/31/95              10.35        0.44           1.54         1.98       (0.44)       0.00          0.00
  10/31/94              10.84        0.34          (0.34)        0.00       (0.34)       0.00         (0.15)
  10/31/93              10.42        0.35           0.68         1.03       (0.35)       0.00         (0.26)
  06/25/92-10/31/92     10.00        0.12           0.52         0.64       (0.12)       0.00         (0.10)
</TABLE>
- --------
 *Annualized
  (a) Per share amounts based on average number of shares outstanding during
      the period.
  (ii) Formerly the NFJ Diversified Low P/E Fund.
  (iii) NFJ and Cadence began serving as Portfolio Managers of the portion of
        the Balanced Fund allocated for investment in common stocks on August
        1, 1996. Prior to August 1, 1996, a different firm served as portfolio
        manager.
 

14    PIMCO Funds: Multi-Manager Series
<PAGE>
 
                        FINANCIAL HIGHLIGHTS (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                                                      RATIO OF NET
DISTRIBUTIONS                                                                              RATIO OF    INVESTMENT
IN EXCESS OF   DISTRIBUTIONS TAX BASIS               NET ASSET               NET ASSETS   EXPENSES TO INCOME (LOSS)
NET REALIZED       FROM      RETURN OF     TOTAL     VALUE END                 END OF     AVERAGE NET  TO AVERAGE     PORTFOLIO
CAPITAL GAINS  EQUALIZATION   CAPITAL  DISTRIBUTIONS OF PERIOD TOTAL RETURN PERIOD (000s)   ASSETS     NET ASSETS   TURNOVER RATE
- ---------------------------------------------------------------------------------------------------------------------------------
<S>            <C>           <C>       <C>           <C>       <C>          <C>           <C>         <C>           <C>
    $0.00         $ 0.00       $0.00      $(2.51)     $16.09      21.84%      $138,650       0.71%        2.71%           45%
     0.00           0.00        0.00       (2.52)      15.41      27.67        121,138       0.72         3.03            45
     0.00           0.00        0.00       (0.82)      14.36      16.35        116,714       0.70*        3.41 *          52
     0.00           0.00        0.00       (0.79)      13.09      19.36        118,015       0.70         3.83            46
     0.00           0.00        0.00       (0.46)      11.75       2.25         92,365       0.70         3.77            36
     0.00           0.00        0.00       (0.77)      11.95      16.65         67,854       0.70         3.55            39
     0.00          (0.23)       0.00       (1.23)      10.92      12.89         30,506       0.70         3.83            47
     0.00           0.00        0.00       (0.39)      10.77      11.81         15,628       0.74*        4.18*           62

     0.00           0.00        0.00       (2.47)      16.08      21.58         11,699       0.96         2.45            45
     0.00           0.00        0.00       (2.48)      15.40      27.40          8,145       0.97         2.79            45
     0.00           0.00        0.00       (0.84)      14.35      16.08          6,097       0.95*        3.19 *          52
     0.00           0.00        0.00       (0.73)      13.13      25.69            140       0.95*        3.43 *          43

    $0.00         $ 0.00       $0.00      $(1.87)     $15.66      19.35%      $ 83,219       0.71%        1.59%           77%
     0.00           0.00        0.00       (0.81)      14.81      26.38         74,613       0.73         2.02            71
     0.00           0.00        0.00       (1.94)      12.46      16.24         52,727       0.70*        2.40*           29
     0.00           0.00        0.00       (1.50)      12.53      24.98         14,443       0.70         2.50            71
     0.00           0.00        0.00       (0.39)      11.55       0.15         15,442       0.70         2.34            44
     0.00           0.00        0.00       (0.77)      11.92      26.35         22,930       0.70         2.43            28
     0.00           0.00        0.00       (0.42)      10.05       4.68         18,083       0.70*        2.57*           73

     0.00           0.00        0.00       (1.85)      15.65      12.71         10,349       0.96*        1.40*           77

    $0.00         $ 0.00       $0.00      $(0.89)     $17.68      17.77%      $ 47,432       0.85%        1.65%           41%
     0.00           0.00        0.00       (2.51)      15.78      31.99         34,639       0.90         1.92            48
     0.00           0.00        0.00       (0.95)      14.20      16.35         29,017       0.85*        2.12*           35
     0.00           0.00        0.00       (1.17)      13.10      19.88         35,093       0.85         2.25            50
     0.00           0.00        0.00       (0.38)      12.07      (2.89)        31,236       0.85         2.23            48
     0.00           0.00        0.00       (0.74)      12.81      23.60         46,523       0.85         2.05            42
     0.00          (0.04)       0.00       (0.50)      10.98      13.75         18,261       0.85         2.16            27
     0.00           0.00        0.00       (0.03)      10.09       1.19          5,060       1.09*        3.06*            0

     0.00           0.00        0.00       (0.87)      17.63      17.41         10,751       1.10         1.39            41
     0.00           0.00        0.00       (2.50)      15.76      31.70          5,916       1.16         1.68            48
     0.00           0.00        0.00       (0.93)      14.20      15.64          4,433       1.10*        1.86*           35

    $0.00         $ 0.00       $0.00      $(7.84)     $12.64      32.33%      $ 36,584       0.71%        0.63%           65%
     0.00           0.00        0.00       (3.73)      16.46      31.45         44,838       0.74         1.31            91
     0.00           0.00        0.00       (0.54)      15.91      14.21         83,425       0.70*        1.58*           53
     0.00           0.00        0.00       (0.42)      14.44      24.46         73,999       0.70         1.91            21
     0.00           0.00        0.00       (0.30)      11.99       1.83         65,915       0.70         2.20            44
     0.00           0.00        0.00       (0.65)      12.08       8.20         46,724       0.70         1.89            15
     0.00          (0.06)       0.00       (0.26)      11.76      11.46         36,515       0.70         1.81            17
     0.00           0.00        0.00       (0.16)      10.80       9.59          4,451       0.73*        2.14*            0

     0.00           0.00        0.00       (7.84)      12.59      23.85         10,409       0.95*        0.47*           65

    $0.00         $ 0.00       $0.00      $(1.43)     $12.15      19.91%      $ 41,222       0.72%        2.91%          186%
     0.00           0.00        0.00       (2.32)      11.42      20.37         61,518       0.74         3.33           199
     0.00           0.00        0.00       (1.28)      11.64       9.07         82,562       0.70*        3.46*          140
     0.00           0.00        0.00       (0.44)      11.89      19.47         72,638       0.70         3.73            43
     0.00           0.00        0.00       (0.49)      10.35       0.08        130,694       0.70         3.25            47
     0.00           0.00        0.00       (0.61)      10.84      10.06        126,410       0.70         3.10            19
     0.00           0.00        0.00       (0.22)      10.42       6.40         99,198       0.70*        3.36*           39
</TABLE>


                                               November 1, 1998 Prospectus   15
<PAGE>
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The investment objective and general investment policies of each Fund are
described below. There can be no assurance that the investment objective of
any Fund will be achieved. Because the market value of each Fund's investments
will change, the net asset value per share of each Fund also will vary.
Specific portfolio securities eligible for purchase by the Funds, investment
techniques that may be used by the Funds, and the risks associated with these
securities and techniques are described more fully under "Characteristics and
Risks of Securities and Investment Techniques" in this Prospectus and
"Investment Objectives and Policies" in the Statement of Additional
Information. For information on other investment policies of the Stock Funds,
see "Investment Objectives and Policies--Stock Funds." This information is
also relevant to an investment in the Balanced Fund because the Common Stock
Segment (as described below) of that Fund is managed in accordance with the
investment policies of the Value and Capital Appreciation Funds.
 
  EMERGING MARKETS FUND seeks long-term growth of capital. The Fund invests
primarily in common stocks of companies located in countries identified as
emerging market countries. The Morgan Stanley Capital International Emerging
Markets Free Index ("MSCI Free Index") and the International Finance
Corporation Emerging Markets Index ("IFC Index") are used as the bases for
choosing the countries in which the Fund invests. However, the Fund is not
limited to the countries and weightings of these indexes. The Portfolio
Manager applies two levels of screening in selecting investments for the Fund.
First, an active country selection model analyzes world markets and assigns a
relative value ranking, or "favorability weighting," to each country in the
relevant country universe to determine markets which are relatively
undervalued. Second, at the stock selection level, quality analysis and value
analysis are applied to each security, assessing variables such as balance
sheet strength and earnings growth (quality factors), and performance relative
to the industry, price to earnings ratios, and price to book ratios (value
factors). This two-level screening method identifies undervalued securities
for purchase as well as provides a sell discipline for fully valued
securities. In selecting securities, the Portfolio Manager considers, to the
extent practicable and on the basis of information available to it for
research, a company's environmental business practices.
 
  For purposes of implementing its investment objective, the Fund invests
primarily in some or all of the following emerging market countries (this list
is not exclusive):
 
  Argentina             Hungary             Peru                 Sri Lanka
  Brazil                India               Philippines          Taiwan
  Chile                 Indonesia           Poland               Thailand
  China                 Israel              Portugal             Turkey
  Colombia              Jordan              Romania              Venezuela
  Czech                 Malaysia            Russia               Zimbabwe
  Republic              Mexico              South Africa
  Greece                Pakistan            South Korea
  Hong Kong
 
  For purposes of allocating the Fund's investments, a company is considered
to be located in the country in which it is domiciled, in which it is
primarily traded, from which it derives a significant portion of its revenues,
or in which a significant portion of its goods or services are produced.
 
  Most of the foreign securities in which the Fund invests will be denominated
in foreign currencies. The Fund may engage in foreign currency transactions to
protect itself against fluctuations in currency exchange rates in relation to
the U.S. dollar or to the weighting of a particular foreign currency on the
MSCI Free Index or the IFC Index. Such foreign currency transactions may
include forward foreign currency contracts, foreign exchange futures
contracts, and options
 

16    PIMCO Funds: Multi-Manager Series

<PAGE>
 
thereon, currency exchange transactions on a spot (i.e., cash) basis, and put
and call options on foreign currencies. Up to 10% of the Fund's assets may be
invested in the securities of other investment companies. The Fund may sell
(write) call and put options. The Fund may utilize stock index futures
contracts and options thereon for hedging purposes and also for investment
purposes. For instance, the Fund may invest in stock index futures contracts
and related options as an alternative to purchasing individual stocks to
adjust its exposure to a particular foreign market. See "Characteristics and
Risks of Securities and Investment Techniques--Derivative Instruments--Index
Futures." The Fund may also engage in equity index swap transactions.
 
  Investing in the securities of foreign issuers, and particularly emerging
market issuers, involves special risks and considerations not typically
associated with investing in U.S. companies. For a discussion of such risks,
see "Characteristics and Risks of Securities and Investment Techniques--
Foreign Securities." Currently, the Portfolio Manager for the Emerging Markets
Fund is Blairlogie. It is anticipated that the Emerging Markets Fund will
reorganize as a series of another mutual fund family on or before March 31,
1999, and thereafter would not be offered as a series of the Trust. See
"Management of the Trust--Portfolio Managers--Blairlogie."
 
  INTERNATIONAL DEVELOPED FUND seeks long-term growth of capital. The Fund
invests primarily in a diversified portfolio of international equity
securities. The Morgan Stanley Capital International EAFE (Europe,
Australasia, Far East) Index ("EAFE Index") is used as a basis for choosing
the countries in which the Fund invests. However, the Fund is not limited to
the countries and weightings of the EAFE Index. Under normal market
conditions, the Fund will invest no more than 35% of its assets in securities
issued by companies located in countries that the Portfolio Manager
determines, on the basis of market capitalization, liquidity, and other
considerations, to have underdeveloped securities markets. The Portfolio
Manager applies two levels of screening in selecting investments for the Fund.
First, an active country selection model analyzes world markets and assigns a
relative value ranking, or "favorability weighting," to each country in the
relevant country universe to determine markets which are relatively
undervalued. Second, at the stock selection level, quality analysis and value
analysis are applied to each security, assessing variables such as balance
sheet strength and earnings growth (quality factors) and performance relative
to the industry, price to earnings ratios, and price to book ratios (value
factors). This two-level screening method identifies undervalued securities
for purchase and also provides a sell discipline for fully valued securities.
In selecting securities, the Portfolio Manager considers, to the extent
practicable and on the basis of information available to it for research, a
company's environmental business practices.
 
  For purposes of allocating the Fund's investments, a company is considered
to be located in the country in which it is domiciled, in which it is
primarily traded, from which it derives a significant portion of its revenues,
or in which a significant portion of its goods or services are produced.
 
  Most of the international equity securities in which the Fund invests will
be traded in foreign currencies. The Fund may engage in foreign currency
transactions to protect itself against fluctuations in currency exchange rates
in relation to the U.S. dollar or to the weighting of a particular foreign
currency on the EAFE Index. Such foreign currency transactions may include
forward foreign currency contracts, foreign exchange futures contracts, and
options thereon, currency exchange transactions on a spot (i.e., cash) basis,
and put and call options on foreign currencies. Up to 10% of the Fund's assets
may be invested in the securities of other investment companies. The Fund may
sell (write) call and put options. The Fund may utilize stock index futures
contracts and options thereon for hedging purposes and also for investment
purposes. For instance, the Fund may invest in stock index futures contracts
and related options as an alternative to purchasing individual stocks to
adjust its exposure to a particular foreign market. See "Characteristics and
Risks of Securities and Investment Techniques--Derivative Instruments--Index
Futures." The Fund may also engage in equity index swap transactions.


                                               November 1, 1998 Prospectus   17
<PAGE>
 
  Investing in the securities of foreign issuers involves special risks and
considerations not typically associated with investing in U.S. companies. For
a discussion of such risks, see "Characteristics and Risks of Securities and
Investment Techniques--Foreign Securities." Currently, the Portfolio Manager
for the International Developed Fund is Blairlogie. It is anticipated that the
International Developed Fund will reorganize as a series of another mutual
fund family on or before March 31, 1999, and thereafter would not be offered
as a series of the Trust. See "Management of the Trust--Portfolio Managers--
Blairlogie."
 
  INTERNATIONAL FUND seeks capital appreciation through investments in an
international portfolio. Income is an incidental consideration. Under normal
market conditions, at least 65% of the International Fund's total assets will
be invested in common stocks, which may or may not pay dividends, as well as
convertible bonds, convertible preferred stocks, warrants, rights or other
equity securities, for a combination of capital appreciation and income.
Convertible securities may include securities convertible only by certain
classes of investors (which may not include the Fund). The Fund may not invest
in convertible securities which are of less than investment grade quality at
the time of purchase.
 
  The Fund will normally invest in securities traded in developed foreign
securities markets. Particular consideration is given to investments
principally traded in developed North American (other than United States),
Japanese, European, Pacific and Australian securities markets, and in
securities of foreign issuers traded on United States securities markets. The
Fund will also invest in emerging markets, where markets may not yet fully
reflect the potential of the developing economy. There are no prescribed
limits on geographic asset distribution and the Fund has the authority to
invest in securities traded in securities markets of any country in the world.
In allocating the Fund's assets among the various securities markets of any
country in the world, the Portfolio Manager will consider such factors as the
condition and growth potential of the various economies and securities
markets, currency and taxation considerations and other pertinent financial,
social, national and political factors. Under certain adverse investment
conditions, the Fund may restrict the number of securities markets in which
its assets will be invested, although under normal market circumstances the
Fund's investments will include securities principally traded in at least
three different countries. The Fund will not limit its investments to any
particular type or size of company.
 
  The Fund may invest up to 10% of its assets in securities of other
investment companies, such as closed-end management investment companies which
invest in foreign markets. The Fund may also purchase and write call and put
options on securities, securities indexes, and on foreign currencies; enter
into futures contracts and use options on futures contracts, including futures
contracts on foreign currencies; buy or sell foreign currencies; and enter
into forward foreign currency contracts. The Fund may utilize stock index
futures contracts and options thereon for hedging purposes and also for
investment purposes. For instance, the Fund may invest in stock index futures
contacts and related options as an alternative to purchasing individual stocks
to adjust its exposure to a particular foreign market. See "Characteristics
and Risks of Securities and Investment Techniques--Derivative Instruments--
Index Futures."
 
  The Fund will not normally invest in securities of U.S. issuers traded on
U.S. securities markets. However, when the Portfolio Manager believes that
conditions in international securities markets warrant a defensive investment
strategy, the Fund may invest up to 100% of its assets in domestic debt,
foreign debt and equity securities principally traded in the U.S., including
money market instruments, obligations issued or guaranteed by the U.S. or a
foreign government or their respective agencies, authorities or
instrumentalities, or corporate bonds and sponsored American Depository
Receipts.
 
  Investing in the securities of foreign issuers, and particularly emerging
market issuers, involves special risks and considerations not typically
associated with investing in U.S. companies. For a discussion of such risks,
see
 

18    PIMCO Funds: Multi-Manager Series

<PAGE>
 
"Characteristics and Risks of Securities and Investment Techniques--Foreign
Securities." Currently, the Portfolio Manager for the International Fund is
Blairlogie. On or before March 31, 1999, it is anticipated that PIMCO Advisors
will sell substantially all of its ownership interest in Blairlogie and assume
full portfolio management responsibility for the International Fund. See
"Management of the Trust--Portfolio Managers--Blairlogie."
 
  CAPITAL APPRECIATION FUND seeks growth of capital. The Fund invests
primarily in common stocks of companies that have improving fundamentals (such
as growth of earnings and dividends) and whose stock is reasonably valued by
the market. Stocks for the Fund are selected from a universe of the
approximately 1,000 largest market capitalization stocks, all of which are
those of companies with market capitalizations of at least $1 billion at the
time of investment. The Fund usually invests in approximately 60 to 100 common
stocks. Each issue is screened and ranked using five distinct computerized
models, including: (i) a dividend growth screen, (ii) an equity growth screen,
(iii) an earnings growth screen, (iv) an earnings momentum screen, and (v) an
earnings surprise screen. The Portfolio Manager believes that the models
identify the stocks in the universe exhibiting growth characteristics with
reasonable valuations. Stocks are replaced when they score worse-than-median
screen ranks, have negative earnings surprises, or show poor relative price
performance. The universe is rescreened frequently to obtain a favorable
composition of growth and value characteristics for the entire Fund. The
Portfolio Manager for the Capital Appreciation Fund is Cadence.
 
  MID-CAP GROWTH FUND seeks growth of capital. The Fund invests primarily in
common stocks of middle capitalization companies that have improving
fundamentals (such as growth of earnings and dividends) and whose stock is
reasonably valued by the market. Stocks for the Fund are selected from a
universe of companies with market capitalizations in excess of $500 million at
the time of investment, excluding the 200 companies with the highest market
capitalization. The Fund usually invests in approximately 60 to 100 common
stocks. Each issue is screened and ranked using five distinct computerized
models, including: (i) a dividend growth screen, (ii) an equity growth screen,
(iii) an earnings growth screen, (iv) an earnings momentum screen, and (v) an
earnings surprise screen. The Portfolio Manager believes that the models
identify the stocks in the universe exhibiting growth characteristics with
reasonable valuations. Stocks are replaced when they score worse-than-median
screen ranks, have negative earnings surprises, or show poor relative price
performance. The universe is rescreened frequently to obtain a favorable
composition of growth and value characteristics for the entire Fund. The
Portfolio Manager for the Mid-Cap Growth Fund is Cadence.
 
  MICRO-CAP GROWTH FUND seeks long-term growth of capital. The Fund invests
primarily in common stocks of companies that have improving fundamentals (such
as growth of earnings and dividends) and whose stock is reasonably valued by
the market. The Fund usually invests in approximately 60 to 100 common stocks
selected from a universe of stocks with publicly available market
capitalizations of less than $100 million at the time of investment. Each
issue is screened and ranked using five distinct computerized models,
including: (i) a dividend growth screen, (ii) an equity growth screen, (iii)
an earnings growth screen, (iv) an earnings momentum screen, and (v) an
earnings surprise screen. The Portfolio Manager believes that the models
identify the stocks in the universe exhibiting growth characteristics with
reasonable valuations. Stocks are replaced when they score worse-than-median
screen ranks, have negative earnings surprises, or show poor relative price
performance. The universe is rescreened frequently to obtain a favorable
composition of growth and value characteristics for the entire Fund. The Fund
is intended for aggressive investors seeking above-average gains and willing
to accept the greater risks associated therewith. The Portfolio Manager for
the Micro-Cap Growth Fund is Cadence.
 
  SMALL-CAP GROWTH FUND seeks growth of capital. The Fund invests primarily in
common stocks of companies that have improving fundamentals (such as growth of
earnings and dividends) and whose stock is reasonably valued by the market.
The Fund usually invests in approximately 60 to 100 common stocks selected
from a universe of stocks with


                                               November 1, 1998 Prospectus   19
<PAGE>
 
market capitalizations of $50 million to $1 billion at the time of investment.
Each issue is screened and ranked using five distinct computerized models,
including: (i) a dividend growth screen, (ii) an equity growth screen, (iii)
an earnings growth screen, (iv) an earnings momentum screen, and (v) an
earnings surprise screen. The Portfolio Manager believes that the models
identify the stocks in the universe exhibiting growth characteristics with
reasonable valuations. Stocks are replaced when they score worse-than-median
screen ranks, have negative earnings surprises, or show poor relative price
performance. The universe is rescreened frequently to obtain a favorable
composition of growth and value characteristics for the entire Fund. The Fund
is intended for aggressive investors seeking above-average gains and willing
to accept the greater risks associated therewith. The Portfolio Manager for
the Small-Cap Growth Fund is Cadence.
 
  RENAISSANCE FUND seeks long-term growth of capital and income. The Fund
invests primarily in common stocks having below-average valuations whose
issuers are experiencing improvements in their business fundamentals. Relative
valuation is determined using a multi-factor approach that examines
characteristics such as price to book, price to earnings and price to cash
flow ratios. Stocks which pass the valuation screen are further analyzed to
identify the key drivers of financial results and catalysts for change which
indicate that a company may demonstrate improving fundamentals in the future.
Stocks which appear likely to exceed consensus expectations are candidates for
addition to the Fund's portfolio. Stocks are sold from the Fund's portfolio
when the Portfolio Manager believes that their ability to exceed investor
expectations has diminished or when their valuations have become excessive.
 
  The Fund may invest a portion of its assets in securities of foreign issuers
traded in foreign securities markets (not including Eurodollar certificates of
deposit), which will not exceed 15% of the Fund's assets at the time of
investment. Investing in the securities of foreign issuers involves special
risks and considerations not typically associated with investing in U.S.
securities. For a discussion of such risks, see "Characteristics and Risks of
Securities and Investment Techniques--Foreign Securities." The Fund may also
purchase and write call and put options on securities and securities indexes;
enter into futures contracts and use options on futures contracts; buy or sell
foreign currencies; and enter into forward foreign currency contracts. The
Portfolio Manager for the Renaissance Fund is Columbus Circle.
 
  CORE EQUITY FUND seeks long-term growth of capital, with income as a
secondary objective. The Fund attempts to exceed the total return performance
of the S&P 500 over a reasonable measurement period. The Fund usually invests
in approximately 40 to 50 common stocks from companies with market
capitalizations in excess of $3 billion at the time of investment. In
selecting securities, the Portfolio Manager uses an investment discipline
called "Positive Momentum & Positive Surprise." It is based on the premise
that companies performing better than expected will have rising securities
prices, while companies producing less than expected results will not. Through
thorough analysis of company fundamentals in the context of the prevailing
economic environment, the companies selected for purchase remain in the Fund
only if they continue to achieve or exceed expectations, and are sold when
business or earnings results are disappointing. Stock selection may include a
significant portion of middle capitalization companies combined with the large
capitalization stocks.
 
  The Fund may invest a portion of its assets in securities of foreign issuers
traded in foreign securities markets, which will not exceed 15% of the Fund's
net assets at the time of investment. Investing in the securities of foreign
issuers involves special risks and considerations not typically associated
with investing in U.S. companies. For a discussion of such risks, see
"Characteristics and Risks of Securities and Investment Techniques--Foreign
Securities." The Fund may also purchase and write call and put options on
securities, securities indexes and on foreign currencies; enter into futures
contracts and use options on futures contracts; and enter into forward foreign
currency contracts. The Portfolio Manager for the Core Equity Fund is Columbus
Circle.
 
 
20    PIMCO Funds: Multi-Manager Series

<PAGE>
 
  MID-CAP EQUITY FUND seeks long-term growth of capital. The Fund usually
invests in approximately 40 to 60 common stocks from companies with market
capitalizations of $800 million to $3 billion at the time of investment. In
selecting securities, the Portfolio Manager uses an investment discipline
called "Positive Momentum & Positive Surprise." It is based on the premise
that companies performing better than expected will have rising securities
prices, while companies producing less than expected results will not. Through
thorough analysis of company fundamentals in the context of the prevailing
economic environment, the companies selected for purchase remain in the Fund
only if they continue to achieve or exceed expectations, and are sold when
business or earnings results are disappointing. Stock selection may include
companies that have grown rapidly from small capitalization status.
 
  The Fund may invest a portion of its assets in securities of foreign issuers
traded in foreign securities markets, which will not exceed 15% of the Fund's
net assets at the time of investment. Investing in the securities of foreign
issuers involves special risks and considerations not typically associated
with investing in U.S. companies. For a discussion of such risks, see
"Characteristics and Risks of Securities and Investment Techniques--Foreign
Securities." The Fund may also purchase and write call and put options on
securities, securities indexes and on foreign currencies; enter into futures
contracts and use options on futures contracts; and enter into forward foreign
currency contracts. The Portfolio Manager for the Mid-Cap Equity Fund is
Columbus Circle.
 
  INNOVATION FUND seeks capital appreciation. No consideration is given to
income. The Fund invests primarily (i.e., at least 65% of its assets) in
common stocks of companies which utilize innovative technologies to gain a
strategic competitive advantage in their industry as well as companies that
provide and service those technologies. Securities will be selected with
minimal emphasis on more traditional factors such as growth potential or value
relative to intrinsic worth. Instead, the Fund will be guided by the theory of
Positive Momentum & Positive Surprise (see "Management of the Trust--Portfolio
Managers--Columbus Circle"), with special emphasis on common stocks of
companies whose perceived strength lies in their use of innovative
technologies in new products, enhanced distribution systems and improved
management techniques. Although the Fund emphasizes the utilization of
technologies, it is not restricted to investment in companies in a particular
business sector or industry.
 
  The Fund may invest a portion of its assets in securities of foreign issuers
traded in foreign securities markets (not including Eurodollar certificates of
deposit), which will not exceed 15% of the Fund's assets at the time of
investment. Investing in the securities of foreign issuers involves special
risks and considerations not typically associated with investing in U.S.
companies. For a discussion of such risks, see "Characteristics and Risks of
Securities and Investment Techniques--Foreign Securities." The Fund may also
purchase and write call and put options on securities and securities indexes;
enter into futures contracts and use options on futures contracts; buy or sell
foreign currencies; and enter into forward foreign currency contracts. The
Portfolio Manager for the Innovation Fund is Columbus Circle.
 
  INTERNATIONAL GROWTH FUND seeks long-term capital appreciation. The Fund
invests in an international portfolio of equity and equity-related securities
of companies the principal activities of which are in countries other than the
United States. The Fund will normally invest in securities traded in foreign
securities markets and in securities of foreign issuers traded on U.S.
securities markets. As noted below, except for temporary defensive
investments, the Fund will not invest in securities of U.S. issuers traded on
U.S. securities markets. Otherwise, there are no prescribed limits on
geographic asset distribution, and the Fund has the authority to invest in
securities traded in securities markets of any country in the world. Under
certain adverse investment conditions, the Fund may restrict the number of
securities markets in which it invests, although under normal market
conditions, the Fund's investments will include securities principally traded
in at least three different countries (not including the U.S.). The Fund will
not limit its investments to any particular type or size of company. In
pursuing its investment objective, under normal market conditions, the Fund
will invest at least 65%


                                               November 1, 1998 Prospectus   21
<PAGE>
 
of its assets in equity securities of issuers which exhibit growth
characteristics in accordance with the Portfolio Manager's Positive Momentum &
Positive Surprise investment discipline (see "Management of the Trust--
Portfolio Managers--Columbus Circle"). The Fund may also invest in issuers
which do not exhibit growth characteristics, but whose securities are thought
to be undervalued.
 
  The Fund may invest in developed foreign securities markets and in emerging
markets, where markets may not fully reflect the potential of the developing
economy. The Fund may also invest in shares of companies which are not
presently listed but are in the process of being privatized by the government
and shares of companies that are traded in over-the-counter markets or other
types of unlisted securities markets.
 
  The Fund will apply the Portfolio Manager's Positive Momentum & Positive
Surprise investment discipline to international markets (see "Management of
the Trust--Portfolio Managers--Columbus Circle"). Asset allocation decisions
("top down") and individual stock selections ("bottom up") result from
identification of positively surprising fundamental trends. Fundamental
factors considered and their importance vary by security, but include country
factors (e.g., changes in the political environment or funds flows);
macroeconomic factors (e.g., GDP growth, inflation and interest rates); global
secular trends (e.g., global grain shortages or growth in wireless
communications); and industry and company specific factors. Investments are
made when the relevant factors are improving (Positive Momentum) faster than
expected (Positive Surprise). The relevant factors can be country (top down)
or company (bottom up) specific.
 
  The Portfolio Manager believes that securities markets of many nations can
be expected to move relatively independently of one another, because business
cycles and other economic or political events that influence one country's
securities markets may have little effect on the securities markets of other
countries. By investing in an international portfolio, the Fund seeks to
reduce the risks associated with investing in the economy of only one country.
 
  The Fund may invest up to 10% of its assets in securities of other
investment companies, such as closed-end management investment companies which
invest in foreign markets. The Fund may also purchase and write call and put
options on securities, securities indexes, and on foreign currencies; enter
into futures contracts and use options on futures contracts, including futures
contracts on foreign currencies; buy or sell foreign currencies; and enter
into forward foreign currency contracts. The Fund may utilize stock index
futures contracts and options thereon for hedging purposes and also for
investment purposes. For instance, the Fund may invest in stock index futures
contracts and related options as an alternative to purchasing individual
stocks to adjust its exposure to a particular foreign market. See
"Characteristics and Risks of Securities and Investment Techniques--Derivative
Instruments--Index Futures."
 
  The Fund will not normally invest in securities of U.S. issuers traded on
U.S. securities markets. However, when the Portfolio Manager believes that
conditions in international securities markets warrant a defensive investment
strategy, the Fund may temporarily invest up to 100% of its assets in domestic
debt, foreign debt and equity securities principally traded in the U.S.,
including money market instruments, obligations issued or guaranteed by the
U.S. or a foreign government or their respective agencies, authorities or
instrumentalities, or corporate bonds and sponsored American Depository
Receipts. The Fund will not invest in debt securities which are of less than
investment grade quality at the time of purchase (i.e., securities rated Ba or
below by Moody's or BB or below by S&P or, if unrated, considered by the
Portfolio Manager to be of comparable quality).
 
  Investing in the securities of foreign issuers, and particularly emerging
market issuers, involves special risks not typically associated with investing
in U.S. companies. For a discussion of such risks, see "Characteristics and
Risks of Securities and Investment Techniques--Foreign Securities." The
Portfolio Manager for the International Growth Fund is Columbus Circle.
 

22    PIMCO Funds: Multi-Manager Series

<PAGE>
 
  EQUITY INCOME FUND seeks current income as a primary investment objective,
and long-term growth of capital as a secondary objective. The Fund invests
primarily in common stocks characterized by having below-average price to
earnings ("P/E") ratios and higher dividend yields relative to their industry
groups. In selecting securities, the Portfolio Manager classifies a universe
of approximately 2,000 stocks by industry, each of which has a minimum market
capitalization of $200 million at the time of investment. The universe is then
screened to find the lowest P/E ratios in each industry, subject to
application of quality and price momentum screens. From this group,
approximately 25 stocks with the highest yields are chosen for the Fund. The
universe is then rescreened to find the highest yielding stock in each
industry, subject to application of quality and price momentum screens. From
this group, approximately 25 stocks with the lowest P/E ratios are added to
the Fund. Although quarterly rebalancing is a general rule, replacements are
made whenever an alternative stock within the same industry has a
significantly lower P/E ratio or higher dividend yield than the current Fund
holding. The Portfolio Manager for the Equity Income Fund is NFJ.
 
  VALUE FUND seeks long-term growth of capital and income. The Fund invests
primarily in common stocks characterized by having below-average P/E ratios
relative to their industry groups. In selecting securities, the Portfolio
Manager classifies a universe of approximately 2,000 stocks by industry, each
of which has a minimum market capitalization of $200 million at the time of
investment. The universe is then screened to find the stocks with the lowest
P/E ratios in each industry, subject to application of quality and price
momentum screens. The stocks in each industry with the lowest P/E ratios that
pass the quality and price momentum screens are then selected for the Fund.
The Fund usually invests in approximately 50 stocks. Although quarterly
rebalancing is a general rule, replacements are made whenever an alternative
stock within the same industry has a significantly lower P/E ratio than the
current Fund holding. The Portfolio Manager for the Value Fund is NFJ.
 
  VALUE 25 FUND seeks long-term growth of capital and income. The Fund invests
primarily in a portfolio of approximately 25 common stocks of companies with
medium market capitalizations and below-average P/E ratios relative to their
industry groups. In selecting securities, the Portfolio Manager classifies a
universe of more than 2,000 stocks by industry, each of which has a minimum
market capitalization of $200 million. The universe is then screened to find
stocks with the lowest P/E ratios in each industry, subject to application of
quality, earnings momentum and price momentum screens. Those stocks which pass
the screenings and satisfy the medium-cap size criteria are further analyzed.
Fundamental research is performed on the companies determined by such process
to be the most undervalued. Approximately 25 stocks, diversified across
industries, are selected on an equal-weighted basis for the Fund's portfolio.
Although quarterly rebalancing is a general rule, replacements are made
whenever an alternative stock has a significantly lower P/E ratio than the
current Fund holdings. Because the Fund concentrates on approximately 25
stocks at any one time (and is not as diversified as many stock funds), it is
intended for aggressive investors seeking above-average capital gains and
willing to accept the greater risks associated therewith. The Portfolio
Manager for the Value 25 Fund is NFJ.
 
  SMALL-CAP VALUE FUND seeks long-term growth of capital and income. The Fund
invests primarily in common stocks of companies with market capitalizations
between $50 million and $1 billion at the time of investment. In selecting
securities, the Portfolio Manager divides a universe of up to approximately
2,000 stocks into quartiles based upon P/E ratio. The lowest quartile in P/E
ratio is screened for market capitalizations between $50 million and $1
billion, subject to application of quality and price momentum screens.
Approximately 100 stocks with the lowest P/E ratios are combined in the Fund,
subject to limits on the weighting for any one industry. Although quarterly
rebalancing is a general rule, replacements are made whenever a holding
achieves a higher P/E ratio than the S&P 500's P/E ratio or its industry
average P/E ratio, or when an alternative stock within the same industry has a
significantly lower P/E ratio than the



                                                November 1, 1998 Prospectus  23
<PAGE>
 
current Fund holding. The Fund is intended for aggressive investors seeking
above-average gains and willing to accept the greater risks associated
therewith. The Portfolio Manager for the Small-Cap Value Fund is NFJ.
 
  ENHANCED EQUITY FUND seeks to provide a total return which equals or exceeds
the total return performance of an index that represents the performance of a
reasonably broad spectrum of common stocks that are publicly traded in the
United States. The Fund currently attempts to equal or exceed the total return
performance of the S&P 500. The Portfolio Manager uses quantitative techniques
to construct a portfolio that consists of some, but not all, of the common
stocks that are represented in the S&P 500. The Fund may invest in common
stocks of foreign issuers if included in the S&P 500. The Fund attempts to
provide risk-controlled exposure to the S&P 500 while adding value through
security selection. The Fund is designed to have no greater volatility than
the S&P 500. Stocks in the S&P 500 are ranked by their exposure to growth and
value factors and combined to create a sector-neutral portfolio which exhibits
above average return potential relative to the S&P 500. Approximately 150
positions are owned by the Fund. Stocks with rising earnings expectations,
reasonable valuation of those earnings and positive investor sentiment are
more heavily weighted. The fundamental inputs used in the stock selection
process include company revenues and cash flow, stock price, reported and
estimated earnings, analyst ratings and earnings estimates revisions. A
computer optimization model is used to achieve diversification and risk
control relative to the S&P 500. Frequent and modest rebalancing assures these
exposures are maintained through time. The Trustees reserve the right to
change, without shareholder approval, the index whose total return the Fund
will attempt to equal or exceed, although it is not anticipated that such a
change would be made in the ordinary course of the Fund's operations. The Fund
may engage in the purchase and writing of options on securities indexes, and
may also invest in stock index futures contracts and options thereon. The
Portfolio Manager for the Enhanced Equity Fund is Parametric.
 
  STRUCTURED EMERGING MARKETS FUND seeks long-term growth of capital. The Fund
invests primarily in equity securities of companies located in, or whose
business relates to, emerging markets. The Portfolio Manager will identify
those markets that it considers to be emerging markets, relying primarily on
those countries listed on the International Finance Corporation Investable
Composite Index (the "IFC Investable Index"). However, the Portfolio Manager
has discretion in identifying other countries that qualify as emerging markets
on the basis of market capitalization and liquidity, as well as their
inclusion, or consideration for inclusion, as emerging market countries in
other broad-based market indexes. The Fund seeks to achieve its objective by
following a disciplined and systematic methodology for selecting and weighting
countries, industries, and stocks. Diversification and consistent exposure to
opportunity are emphasized over tactical timing decisions with regard to
countries, industries, or stocks. A disciplined methodology for maintaining
the allocation to countries, industries, and stocks is utilized in portfolio
composition, rather than discretionary shifting in country and industry
concentration levels. First, countries are selected based upon their level of
development and equity market institutions. GNP per capita, local economic
diversification, and freedom of investment flows are the primary
considerations in country selection decisions. Most countries are assigned an
equal weight in the Fund unless the size of their equity market is
prohibitive; countries with smaller markets (i.e., less than $5 billion of
market capitalization) are assigned one-half of the weight assigned to
countries with larger markets. Second, all stocks in each eligible country are
divided into five broad economic sector groups: financial, industrial,
consumer, utilities, and natural resources. The Portfolio Manager will
generally endeavor to maintain exposure across all five sectors in each
country. Finally, stocks are selected and purchased to fill out the country
and industry structure. Stock purchase candidates are examined for liquidity,
industry representation, performance relative to industry, and long-term
profitability. Under normal market conditions and assuming Fund size of at
least $5 million, the Portfolio Manager will endeavor to maintain investment
exposure to roughly 20 countries and hold in excess of 200 securities in the
Fund. The allocation methodology described above may be changed from time to
time based on evaluations of economic trends by the Portfolio Manager,
consistent with the principles of broad country and company diversification of
the Fund's investments.
 

24    PIMCO Funds: Multi-Manager Series

<PAGE>
 
  For purposes of implementing its investment objective, the Fund invests
primarily in some or all of the following emerging market countries (this list
is not exclusive):
 
  Argentina             Greece              Mexico               Slovenia
  Botswana              Hungary             Morocco              South Africa
  Brazil                India               Pakistan             South Korea
  Chile                 Indonesia           Peru                 Taiwan
  China                 Israel              Philippines          Thailand
  Colombia              Kenya               Poland               Turkey
  Czech Republic        Latvia              Portugal             Venezuela
  Egypt                 Lithuania           Romania              Zimbabwe
  Estonia               Mauritius           Russia
  Ghana                 Malaysia            Slovak Republic
 
  For purposes of allocating the Fund's investments, a company is considered
to be located in the country in which the company is domiciled, and a
company's business "relates to" any emerging market country in which the
company's securities are primarily traded, from which the company derives a
significant portion of its revenues, or in which a significant portion of the
company's goods or services are produced.
 
  Most of the foreign securities in which the Fund invests will be denominated
in foreign currencies. The Fund may engage in foreign currency transactions to
protect itself against fluctuations in currency exchange rates in relation to
the U.S. dollar or to the weighting of a particular foreign currency on the
IFC Investable Index. Such foreign currency transactions may include forward
foreign currency contracts, foreign exchange futures contracts, and options
thereon, currency exchange transactions on a spot (i.e., cash) basis, and put
and call options on foreign currencies. The Fund may sell (write) call and put
options. The Fund may utilize stock index futures contracts and options
thereon for hedging purposes and also for investment purposes. For instance,
the Fund may invest in stock index futures contracts and related options as an
alternative to purchasing individual stocks to adjust its exposure to a
particular foreign market. See "Characteristics and Risks of Securities and
Investment Techniques--Derivative Instruments--Index Futures." The Fund may
also engage in equity index swap transactions.
 
  Investing in securities of foreign issuers, and particularly emerging market
issuers, involves special risks and considerations not typically associated
with investing in U.S. companies. For a discussion of such risks, see
"Characteristics and Risks of Securities and Investment Techniques--Foreign
Securities." The Portfolio Manager for the Structured Emerging Markets Fund is
Parametric.
 
  TAX-EFFICIENT STRUCTURED EMERGING MARKETS FUND has the same investment
objective and policies as the Structured Emerging Markets Fund, except that
the Fund seeks to achieve superior after-tax returns for its shareholders in
part by minimizing the taxes they incur in connection with the Fund's
investment income and realized capital gains by using the strategies described
under "Tax-Efficient Management Strategies" below. While the Fund seeks to
minimize investor taxes associated with the Fund's investment income and
realized capital gains, the Fund may have taxable investment income and may
realize taxable gains from time to time.
 
  Investing in securities of foreign issuers, and particularly emerging market
issuers, involves special risks and considerations not typically associated
with investing in U.S. companies. For a discussion of such risks, see
"Characteristics and Risk of Securities and Investment Techniques--Foreign
Securities." The Portfolio Manager for the Tax-Efficient Structured Emerging
Markets Fund is Parametric.
 
  TAX-EFFICIENT EQUITY FUND seeks maximum after-tax growth of capital. The
Fund attempts to provide a total return which exceeds the return of the S&P
500. In addition, the Fund seeks to achieve superior after-tax returns for its
shareholders in part by minimizing the taxes they incur in connection with the
Fund's investment income and realized


                                               November 1, 1998 Prospectus   25
<PAGE>
 
capital gains by using the strategies described under "Tax-Efficient
Management Strategies" below. Notwithstanding these strategies, the Fund may
have taxable investment income and may realize taxable gains from time to
time.
 
  The Fund invests primarily in a broadly diversified portfolio of at least
200 common stocks of companies with larger market capitalizations. In
selecting specific securities, the Portfolio Manager uses a proprietary
quantitative model that ranks companies based on long-term (5-10 years) price
appreciation potential through analysis of such factors as growth of
sustainable earnings and dividend behavior. Securities in the top 50% of the
model's ranking are considered for purchase. The Portfolio Manager's sell
discipline incorporates a focus on reducing the realization of capital gains.
Each sell candidate is evaluated based on its cost, current market value, and
anticipated benefit of replacement. Securities in the bottom 20% of the
model's ranking are considered for sale. The Fund may engage in the purchase
and writing of options on securities indexes and may also invest in stock
index futures contracts and options thereon. The Portfolio Manager for the
Tax-Efficient Equity Fund is Parametric.
 
  Tax-Efficient Management Strategies The Portfolio Manager for the Tax-
Efficient Structured Emerging Markets and Tax-Efficient Equity Funds utilizes
a range of active tax management techniques to minimize taxable distributions
for these Funds, including: low portfolio turnover; emphasis towards low-
dividend, growth-oriented companies; tax lot accounting (identification of
specific shares of securities being sold that have the lowest tax cost); and
regular rebalancing to capture available tax credits. The Tax-Efficient
Structured Emerging Markets and Tax-Efficient Equity Funds will generally seek
to avoid realizing net short-term capital gains and, when realizing gains,
will attempt to realize long-term gains (i.e., gains on securities held for
more than 12 months). The Funds intend to notify each shareholder as to that
portion of his or her capital gain dividends which qualifies for a long-term
tax rate of 20% in the hands of the shareholder. Net short-term capital gains,
when distributed, will be taxed as ordinary income, at graduated rates of up
to 39.6%. When these Funds decide to sell a particular appreciated security,
they will normally select for sale first those share lots with holding periods
exceeding 12 months and among those, the share lots with the highest cost
basis. The Funds may, when prudent, sell securities to realize capital losses
that can be used to offset realized capital gains.
 
  To protect against price declines in securities holdings with large
accumulated capital gains, the Tax-Efficient Structured Emerging Markets and
Tax-Efficient Equity Funds may, to the extent permitted by law, use hedging
techniques such as the purchase of put options, the sale of stock index
futures contracts, and equity swaps. By using these techniques rather than
selling such securities, the Funds can reduce their exposure to price declines
in the securities without realizing substantial capital gains. In limited
circumstances, the Funds may follow the practice of distributing selected
appreciated securities to meet redemptions of certain investors and may,
within certain limits, use the selection of securities distributed to meet
such redemptions as a management tool. By distributing appreciated securities
the Funds can reduce their position in such securities without realizing
capital gains. During periods of net withdrawals by investors, using
distributions of securities could enable the Funds to avoid the forced sale of
securities to raise cash for meeting redemptions.
 
  It is expected that by employing the various tax-efficient management
strategies described above, the Tax-Efficient Structured Emerging Markets and
Tax-Efficient Equity Funds can minimize the extent to which shareholders incur
taxes as a result of realized capital gains. The Funds may nevertheless
realize gains and shareholders will incur tax liability from time to time.
 
  BALANCED FUND seeks total return consistent with prudent investment
management. The Fund attempts to achieve this objective through a management
policy of investing in the following asset classes: common stock, fixed income
securities, and money market instruments. The proportion of the Fund's total
assets allocated among common stocks,

 
26    PIMCO Funds: Multi-Manager Series

<PAGE>
 
fixed income securities, and money market instruments will vary from time to
time and will be determined by the Adviser. In determining the allocation of
the Fund's assets among the three asset classes, the Adviser will employ asset
allocation principles which take into account certain economic factors, market
conditions, and the expected relative total return and risk of the various
asset classes. Under normal circumstances, it is anticipated that the Fund
will generally maintain a balance among the types of securities in which it
invests. Thus, the Fund will normally maintain 40% to 65% of its assets in
common stock, at least 25% of its assets in fixed income securities, and less
than 10% of its assets in money market instruments. However, in no event would
the Fund invest in any common stock if, at the time of investment, more than
80% of the Fund's assets would be invested in common stock; in no event would
the Fund invest in a fixed income security (other than a short-term
instrument) if, at the time of investment, more than 80% of the Fund's assets
would be invested in fixed income securities; nor would the Fund invest in a
money market instrument if, at the time of investment, more than 60% of its
assets would be invested in money market instruments.
 
  In managing the Fund, the Adviser uses a specialist approach and has engaged
three of the Trust's Portfolio Managers to manage certain portions of the
Fund's assets. The portion of the assets of the Fund allocated by the Adviser
for investment in common stock (the "Common Stock Segment") will be further
allocated by the Adviser for investment by Cadence and NFJ. The portion of the
Common Stock Segment allocated to Cadence will be managed in accordance with
the investment policies of the Capital Appreciation Fund; the portion
allocated to NFJ will be managed in accordance with the investment policies of
the Value Fund. Allocations of the Common Stock Segment to Cadence and NFJ
will vary from time to time as determined by the Adviser.
 
  The portion of the assets of the Fund allocated by the Adviser for
investment in fixed income securities (the "Fixed Income Securities Segment")
will be managed by Pacific Investment Management. The Fund may invest the
Fixed Income Securities Segment in the following types of securities:
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities; corporate debt securities, including convertible securities
and corporate commercial paper; mortgage-related and other asset-backed
securities; inflation-indexed bonds issued by both governments and
corporations; structured notes, including hybrid or "indexed" securities,
catastrophe bonds and loan participations; delayed funding loans and revolving
credit facilities; bank certificates of deposit, fixed time deposits and
bankers' acceptances; repurchase agreements and reverse repurchase agreements;
obligations of foreign governments or their subdivisions, agencies and
instrumentalities; and obligations of international agencies or supranational
entities. Fixed income securities may have fixed, variable, or floating rates
of interest.
 
  The Fund invests the Fixed Income Securities Segment in fixed income
securities of varying maturities. Portfolio holdings will be concentrated in
areas of the bond market (based on quality, sector, coupon or maturity) that
the Portfolio Manager believes to be relatively undervalued. Fixed income
securities in which the Fund may invest will, at the time of investment, be
rated Baa or better by Moody's, BBB or better by S&P or, if not rated by
Moody's or S&P, will be of comparable quality as determined by the Portfolio
Manager, except that up to 10% of the Fixed Income Securities Segment may be
invested in lower rated securities that are rated B or higher by Moody's or
S&P or, if not rated by Moody's or S&P, determined by the Portfolio Manager to
be of comparable quality. High yield fixed income securities rated lower than
Baa by Moody's or BBB by S&P, or of equivalent quality, are not considered to
be investment grade, and are commonly referred to as "junk bonds." Securities
rated below investment grade and comparable unrated securities are subject to
greater risks than higher quality fixed income securities. See
"Characteristics and Risks of Securities and Investment Techniques--High Yield
Securities ("Junk Bonds")." The Fund also may invest up to 20% of the Fixed
Income Securities Segment in securities denominated in foreign currencies, and
may invest beyond this limit in U.S. dollar-denominated securities of foreign
issuers. Investing in securities denominated in foreign currencies and
securities of foreign issuers involves special risks and considerations not
typically associated with investing in U.S.


                                               November 1, 1998 Prospectus   27
<PAGE>
 
securities. For a discussion of such risks, see "Characteristics and Risks of
Securities and Investment Techniques--Foreign Securities."
 
  Each Portfolio Manager generally invests a portion of its allocation in
liquid securities to facilitate redemptions. In addition, PIMCO Advisors
reserves the right to allocate a portion of the Fund's assets (the "Money
Market Segment") for investment in money market instruments and reserves the
right to manage the investment of such assets. Because of the Fund's flexible
investment policy, portfolio turnover may be greater than for a fund that does
not allocate assets among various types of securities. See "Portfolio
Transactions."
 
  The Fund may engage in the purchase and writing of put and call options on
debt securities and securities indexes and may also purchase or sell interest
rate futures contracts, stock index futures contracts, and options thereon.
The Fund also may enter into swap agreements with respect to foreign
currencies, interest rates, and securities indexes. With respect to securities
of the Fixed Income Securities Segment denominated in foreign currencies, the
Fund may engage in foreign currency exchange transactions by means of buying
or selling foreign currencies on a spot basis, entering into forward foreign
currency contracts, and buying and selling foreign currency options, foreign
currency futures, and options on foreign currency futures. Foreign currency
exchange transactions may be entered into for the purpose of hedging against
foreign currency exchange risk arising from the Fund's investment or
anticipated investment in securities denominated in foreign currencies and for
purposes of increasing exposure to a particular foreign currency or to shift
exposure to foreign currency fluctuations from one country to another.
 
  Duration  Under normal circumstances, the average portfolio duration of the
Fixed Income Securities Segment of the Balanced Fund will vary within a three-
to six-year time frame, based on the Portfolio Manager's forecast for interest
rates. Duration is a measure of the expected life of a fixed income security
that was developed as a more precise alternative to the concept of "term to
maturity." Traditionally, a fixed income security's "term to maturity" has
been used as proxy for the sensitivity of the security's price to changes in
interest rates (which is the "interest rate risk" or "volatility" of the
security). However, "term to maturity" measures only the time until a fixed
income security provides its final payment, taking no account of the pattern
of the security's payments prior to maturity. In contrast, duration
incorporates a bond's yield, coupon interest payments, final maturity and call
features into one measure of the average life of a fixed income security on a
present value basis. Duration management is one of the fundamental tools used
by the Portfolio Manager for the Fixed Income Securities Segment of the
Balanced Fund. For more information on investments in fixed income securities,
see "Characteristics and Risks of Securities and Investment Techniques" in
this Prospectus and "Investment Objectives and Policies" in the Statement of
Additional Information.
 
STOCK FUNDS
 
  The Emerging Markets, International Developed, Capital Appreciation, Mid-Cap
Growth, Micro-Cap Growth, Small-Cap Growth, Core Equity, Mid-Cap Equity,
Equity Income, Value, Value 25, Small-Cap Value, Enhanced Equity, Structured
Emerging Markets, Tax-Efficient Structured Emerging Markets, and Tax-Efficient
Equity Funds will each invest primarily (normally at least 65% of its assets)
in common stock. Each of these Funds may maintain a portion of its assets,
which will usually not exceed 10%, in U.S. Government securities, high quality
debt securities (whose maturity or remaining maturity will not exceed five
years), money market obligations, and in cash to provide for payment of the
Fund's expenses and to meet redemption requests. It is the policy of these
Funds to be as fully invested in common stocks as practicable at all times.
This policy precludes these Funds from investing in debt securities as a
defensive investment posture (although these Funds may invest in such
securities to provide for payment of expenses and to meet redemption
requests). Accordingly, investors in these Funds bear the risk of general
declines in stock prices and the risk that a Fund's exposure
 

28    PIMCO Funds: Multi-Manager Series

<PAGE>
 
to such declines cannot be lessened by investment in debt securities. The
Funds may also invest in convertible securities, preferred stock, and
warrants, subject to certain limitations.
 
  The International, Renaissance, and Innovation Funds will each invest
primarily (normally at least 65% of its assets) in common stocks, and may also
invest in other equity securities, including preferred stocks and securities
(including debt securities and warrants) convertible into or exercisable for
common stocks. The International Growth Fund will invest primarily in equity
and equity-related securities. Each of these Funds may invest a portion or,
for temporary defensive purposes, up to 100% of its assets in short-term U.S.
Government securities and other money market instruments.
 
  One or more of the Stock Funds may temporarily not be invested primarily in
equity securities immediately following the commencement of operations or
after receipt of significant new monies. While attempting to identify suitable
investments, the Funds may hold assets in cash, short-term U.S. Government
securities, and other money market instruments. Any of the Stock Funds may
temporarily not contain the number of securities in which the Fund normally
invests if the Fund does not have sufficient assets to be fully invested, or
pending the Portfolio Manager's ability to prudently invest new monies.
 
  The Stock Funds may also lend portfolio securities; enter into repurchase
agreements and reverse repurchase agreements (subject to the Funds' investment
limitations described below); purchase and sell securities on a when-issued or
delayed delivery basis; and enter into forward commitments to purchase
securities. All of the Stock Funds may invest in American Depository Receipts
("ADRs"). The Emerging Markets, International Developed, International,
Renaissance, Core Equity, Mid-Cap Equity, Innovation, International Growth,
Structured Emerging Markets, and Tax-Efficient Structured Emerging Markets
Funds may invest in European Depository Receipts ("EDRs") and Global
Depository Receipts ("GDRs"). The Stock Funds that invest primarily in
securities of foreign issuers may invest a portion of their assets in debt
securities and money market obligations issued by U.S. and foreign issuers
that are either U.S. dollar-denominated or denominated in foreign currency.
For more information on these and other investment practices, see
"Characteristics and Risks of Securities and Investment Techniques" in this
Prospectus and "Investment Objectives and Policies" in the Statement of
Additional Information.
 
                            INVESTMENT RESTRICTIONS
 
  The investment restrictions set forth below are fundamental policies of the
International, Renaissance, Innovation, and International Growth Funds and may
not be changed with respect to any such Fund without shareholder approval by
vote of a majority of the outstanding voting securities of that Fund. The
investment objective of each of these Funds and the Value 25, Tax-Efficient
Structured Emerging Markets, and Tax-Efficient Equity Funds is non-fundamental
and may be changed with respect to each such Fund by the Trustees without
shareholder approval. Under the following fundamental restrictions, none of
the International, Renaissance, Innovation, and International Growth Funds
may:
 
  (1)  Borrow money in excess of 10% of the value (taken at the lower of cost
       or current value) of such Fund's total assets (not including the
       amount borrowed) at the time the borrowing is made, and then only from
       banks as a temporary measure to facilitate the meeting of redemption
       requests (not for leverage) which might otherwise require the untimely
       disposition of portfolio investments or for extraordinary or emergency
       purposes. Such borrowings will be repaid before any additional
       investments are purchased.
 
  (2)  Pledge, hypothecate, mortgage or otherwise encumber its assets in
       excess of 10% of such Fund's total assets (taken at cost) and then
       only to secure borrowings permitted by Restriction (1) above. (The
       deposit of securities or cash or cash equivalents in escrow in
       connection with the writing of covered call or put options,
       respectively, is not deemed to be pledges or other encumbrances.) (For
       the purpose of this restriction, collateral


                                               November 1, 1998 Prospectus   29
<PAGE>
 
     arrangements with respect to the writing of options, futures contracts,
     options on futures contracts, and collateral arrangements with respect
     to initial and variation margin are not deemed to be a pledge of assets
     and neither such arrangements nor the purchase or sale of futures or
     related options are deemed to be the issuance of a senior security).
 
  (3)  Underwrite securities issued by other persons except to the extent
       that, in connection with the disposition of its portfolio investments,
       it may be deemed to be an underwriter under federal securities laws.
 
  (4)   Purchase or sell real estate, although it may purchase securities of
        issuers which deal in real estate, including securities of real
        estate investment trusts, and may purchase securities which are
        secured by interests in real estate.
 
  (5)   Acquire more than 10% of the voting securities of any issuer, both
        with respect to any such Fund and to the Funds to which this policy
        relates in the aggregate.
 
  (6)   Concentrate more than 25% of the value of its total assets in any one
        industry; except that the Innovation Fund will concentrate more than
        25% of its assets in companies which use innovative technologies to
        gain a strategic, competitive advantage in their industry as well as
        companies that provide and service those technologies.
 
  The investment restrictions set forth below are fundamental policies of each
of the Emerging Markets, International Developed, Capital Appreciation, Mid-
Cap Growth, Micro-Cap Growth, Small-Cap Growth, Core Equity, Mid-Cap Equity,
Equity Income, Value, Value 25, Small-Cap Value, Enhanced Equity, Structured
Emerging Markets, Tax-Efficient Structured Emerging Markets, Tax-Efficient
Equity, and Balanced Funds and may not be changed with respect to any such
Fund without shareholder approval by vote of a majority of the outstanding
shares of that Fund. The investment objective of each of these Funds (with the
exception of the Value 25, Tax-Efficient Structured Emerging Markets, and Tax-
Efficient Equity Funds) is also fundamental and may not be changed without
such shareholder approval. Under the following fundamental restrictions, none
of the above-referenced Funds may:
 
  (1)  Invest in a security if, as a result of such investment, more than 25%
       of its total assets (taken at market value at the time of such
       investment) would be invested in the securities of issuers in any
       particular industry, except that this restriction does not apply to
       securities issued or guaranteed by the U.S. Government or its agencies
       or instrumentalities (or repurchase agreements with respect thereto).
 
  (2)  With respect to 75% of its assets, invest in a security if, as a
       result of such investment, more than 5% of its total assets (taken at
       market value at the time of such investment) would be invested in the
       securities of any one issuer, except that this restriction does not
       apply to securities issued or guaranteed by the U.S. Government or its
       agencies or instrumentalities.
 
  (3)  With respect to 75% of its assets, invest in a security if, as a
       result of such investment, it would hold more than 10% (taken at the
       time of such investment) of the outstanding voting securities of any
       one issuer, except that this restriction does not apply to securities
       issued or guaranteed by the U.S. Government or its agencies or
       instrumentalities.
 
  (4)  Purchase or sell real estate, although it may purchase securities
       secured by real estate or interests therein, or securities issued by
       companies in the real estate industry or which invest in real estate
       or interests therein.
 
  (5)  Purchase or sell commodities or commodities contracts (which, for the
       purpose of this restriction, shall not include foreign currency or
       forward foreign currency contracts or swap agreements), except that
       any such Fund may engage in interest rate futures contracts, stock
       index futures contracts, futures contracts based on other financial
       instruments or one or more groups of instruments, and on options on
       such futures contracts.
 

30    PIMCO Funds: Multi-Manager Series

<PAGE>
 
  (6)  Purchase securities on margin, except for use of short-term credit
       necessary for clearance of purchases and sales of portfolio
       securities, but it may make margin deposits in connection with
       transactions in options, futures, and options on futures, and except
       that effecting short sales will be deemed not to constitute a margin
       purchase for purposes of this restriction.
 
  (7)  Borrow money, or pledge, mortgage or hypothecate its assets, except
       that a Fund may (i) borrow from banks or enter into reverse repurchase
       agreements, or employ similar investment techniques, and pledge its
       assets in connection therewith, but only if immediately after each
       borrowing and continuing thereafter, there is asset coverage of 300%
       and (ii) enter into reverse repurchase agreements and transactions in
       options, futures, options on futures, and forward foreign currency
       contracts as described in this Prospectus and in the Statement of
       Additional Information (the deposit of assets in escrow in connection
       with the writing of covered put and call options and the purchase of
       securities on a when-issued or delayed delivery basis and collateral
       arrangements with respect to initial or variation margin deposits for
       futures contracts, options on futures contracts, and forward foreign
       currency contracts will not be deemed to be pledges of such Fund's
       assets).
 
  (8)  Issue senior securities, except insofar as such Fund may be deemed to
       have issued a senior security by reason of borrowing money in
       accordance with the Fund's borrowing policies, and except for purposes
       of this investment restriction, collateral, escrow, or margin or other
       deposits with respect to the making of short sales, the purchase or
       sale of futures contracts or related options, purchase or sale of
       forward foreign currency contracts, and the writing of options on
       securities are not deemed to be an issuance of a senior security.
 
  (9)  Lend any funds or other assets, except that such Fund may, consistent
       with its investment objective and policies: (a) invest in debt
       obligations, including bonds, debentures, or other debt securities,
       bankers' acceptances and commercial paper, even though the purchase of
       such obligations may be deemed to be the making of loans, (b) enter
       into repurchase agreements and reverse repurchase agreements, and (c)
       lend its portfolio securities in an amount not to exceed one-third of
       the value of its total assets, provided such loans are made in
       accordance with applicable guidelines established by the Securities
       and Exchange Commission ("SEC") and the Trustees of the Trust.
 
  (10)  Act as an underwriter of securities of other issuers, except to the
        extent that in connection with the disposition of portfolio
        securities, it may be deemed to be an underwriter under the federal
        securities laws.
 
  Unless otherwise noted, the remaining restrictions and policies of each Fund
relating to the investment of its assets and activities are non-fundamental
and may be changed without shareholder approval. As indicated above, certain
fundamental investment restrictions do not apply to certain Funds. However,
certain non-fundamental restrictions, set forth in the Statement of Additional
Information, place comparable limitations on these Funds. See "Investment
Restrictions" in the Statement of Additional Information.
 
  Unless otherwise indicated, all limitations applicable to Fund investments
apply only at the time a transaction is entered into. Any subsequent change in
a rating assigned by any rating service to a security (or, if unrated, deemed
to be of comparable quality), or change in the percentage of Fund assets
invested in certain securities or other instruments resulting from market
fluctuations or other changes in a Fund's total assets will not require a Fund
to dispose of an investment until the Adviser or Portfolio Manager determines
that it is practicable to sell or close out the investment without undue
market or tax consequences to the Fund. In the event that ratings services
assign different ratings to the same security, the Adviser or Portfolio
Manager will determine which rating it believes best reflects the security's
quality and risk at that time, which may be the higher of the several assigned
ratings.


                                               November 1, 1998 Prospectus   31
<PAGE>
 
       CHARACTERISTICS AND RISKS OF SECURITIES AND INVESTMENT TECHNIQUES
 
  The different types of securities and investment techniques used by the
individual Funds all have attendant risks of varying degrees. For example,
with respect to common stock, there can be no assurance of capital
appreciation, and there is a risk of market decline. With respect to debt
securities, including money market instruments, there is the risk that the
issuer of a security may not be able to meet its obligation to make scheduled
interest or principal payments. Because each Fund seeks a different investment
objective and has different investment policies, each is subject to varying
degrees of financial, market, and credit risks. Therefore, investors should
carefully consider the investment objective, investment policies, and
potential risks of any Fund or Funds before investing.
 
  The following describes potential risks associated with different types of
investment techniques that may be used by the individual Funds. For more
detailed information on these investment techniques, as well as information on
the types of securities in which some or all of the Funds may invest, see the
Statement of Additional Information.
 
SMALL AND MEDIUM CAPITALIZATION STOCKS
 
  Certain of the Funds may invest in common stock of companies with market
capitalizations that are small compared to those of other publicly traded
companies. Generally, small market capitalization is considered to be less
than $1.5 billion and large market capitalization is considered to be more
than $5 billion. Under normal market conditions, the Small-Cap Growth and
Small-Cap Value Funds will invest primarily in companies with market
capitalizations of between $50 million and $1 billion, and the Micro-Cap
Growth Fund will invest primarily in companies with market capitalizations of
less than $100 million. Investments in larger companies present certain
advantages in that such companies generally have greater financial resources,
more extensive research and development, manufacturing, marketing and service
capabilities, and more stability and greater depth of management and technical
personnel. Investments in smaller, less seasoned companies may present greater
opportunities for growth but also may involve greater risks than customarily
are associated with more established companies. The securities of smaller
companies may be subject to more abrupt or erratic market movements than
larger, more established companies. These companies may have limited product
lines, markets or financial resources, or they may be dependent upon a limited
management group. Their securities may be traded in the over-the-counter
market or on a regional exchange, or may otherwise have limited liquidity. As
a result of owning large positions in this type of security, a Fund is subject
to the additional risk of possibly having to sell portfolio securities at
disadvantageous times and prices if redemptions require the Fund to liquidate
its securities positions. In addition, it may be prudent for a Fund with a
relatively large asset size to limit the number of relatively small positions
it holds in securities having limited liquidity in order to minimize its
exposure to such risks, to minimize transaction costs, and to maximize the
benefits of research. As a consequence, as a Fund's asset size increases, the
Fund may reduce its exposure to illiquid small capitalization securities,
which could adversely affect performance.
 
  Many of the Funds may also invest in stocks of companies with medium market
capitalizations. Whether a U.S. issuer's market capitalization is medium is
determined by reference to the capitalization for all issuers whose equity
securities are listed on a United States national securities exchange or which
are reported on NASDAQ. Issuers with market capitalizations within the range
of capitalization of companies included in the S&P Mid Cap 400 Index may be
regarded as being issuers with medium market capitalizations. Such investments
share some of the risk characteristics of investments in stocks of companies
with small market capitalizations described above, although such companies
tend to have longer operating histories, broader product lines and greater
financial resources, and their stocks tend to be more liquid and less volatile
than those of smaller capitalization issuers.
 

32    PIMCO Funds: Multi-Manager Series

<PAGE>
 
REPURCHASE AGREEMENTS
 
  For the purposes of maintaining liquidity and achieving income, each Fund
may enter into repurchase agreements, which entail the purchase of a
portfolio-eligible security from a bank or broker-dealer that agrees to
repurchase the security at the Fund's cost plus interest within a specified
time (normally one day). If the party agreeing to repurchase should default,
as a result of bankruptcy or otherwise, the Fund will seek to sell the
securities which it holds, which action could involve procedural costs or
delays in addition to a loss on the securities if their value should fall
below their repurchase price. Those Funds whose investment objectives do not
include the earning of income will invest in repurchase agreements only as a
cash management technique with respect to that portion of the portfolio
maintained in cash. Each Fund will limit its investment in repurchase
agreements maturing in more than seven days consistent with the Fund's policy
on investment in illiquid securities.
 
REVERSE REPURCHASE AGREEMENTS AND OTHER BORROWINGS
 
  A reverse repurchase agreement may for some purposes be considered borrowing
that involves the sale of a security by a Fund and its agreement to repurchase
the instrument at a specified time and price. The Fund will segregate assets
determined to be liquid by the Adviser or a Portfolio Manager in accordance
with procedures established by the Board of Trustees to cover its obligations
under reverse repurchase agreements. Reverse repurchase agreements will be
subject to the Funds' limitations on borrowings. A Fund also may borrow money
for investment purposes subject to any policies of the Fund currently
described in this Prospectus or in the Statement of Additional Information.
Such a practice will result in leveraging of a Fund's assets. Leverage will
tend to exaggerate the effect on net asset value of any increase or decrease
in the value of a Fund's portfolio and may cause a Fund to liquidate portfolio
positions when it would not be advantageous to do so.
 
LOANS OF PORTFOLIO SECURITIES
 
  For the purpose of achieving income, each Fund may lend its portfolio
securities to brokers, dealers, and other financial institutions, provided:
 
  (i)  the loan is secured continuously by collateral consisting of U.S.
       Government securities, cash or cash equivalents (negotiable
       certificates of deposit, bankers' acceptances or letters of credit)
       maintained on a daily mark-to-market basis in an amount at least equal
       to the current market value of the securities loaned;
 
  (ii)   the Fund may at any time call the loan and obtain the return of the
         securities loaned;
 
  (iii)  the Fund will receive any interest or dividends paid on the loaned
         securities; and
 
  (iv)   the aggregate market value of securities loaned will not at any time
         exceed the Fund's limitation on lending its portfolio securities.
 
  Each Fund's performance will continue to reflect changes in the value of the
securities loaned and will also reflect the receipt of either interest,
through investment of cash collateral by the Fund in permissible investments,
or a fee, if the collateral is U.S. Government securities. Securities lending
involves the risk of loss of rights in the collateral or delay in recovery of
the collateral should the borrower fail to return the security loaned or
become insolvent. The Funds may pay lending fees to the party arranging the
loan.
 
FOREIGN SECURITIES
 
  The Emerging Markets, International Developed, International, International
Growth, Structured Emerging Markets, and Tax-Efficient Structured Emerging
Markets Funds may invest directly in foreign equity securities; U.S. dollar-
or foreign currency-denominated foreign corporate debt securities; foreign
preferred securities; certificates of deposit, fixed time


                                               November 1, 1998 Prospectus   33
<PAGE>
 
deposits and bankers' acceptances issued by foreign banks; and obligations of
foreign governments or their subdivisions, agencies and instrumentalities,
international agencies and supranational entities. The Renaissance, Core
Equity, Mid-Cap Equity, and Innovation Funds may invest up to 15% of their
respective net assets in securities which are traded principally in securities
markets outside the United States (Eurodollar certificates of deposit are
excluded for purposes of these limitations). The Renaissance and Innovation
Funds may invest without limit in securities of foreign issuers that are
traded in U.S. markets. The Enhanced Equity Fund may invest in common stock of
foreign issuers if included in the index from which stocks are selected. The
Balanced Fund may invest up to 20% of its Fixed Income Securities Segment in
securities denominated in foreign currencies, and may invest beyond this limit
in U.S. dollar-denominated securities of foreign issuers.
 
  All of the Funds may invest in ADRs. In addition, the Emerging Markets,
International Developed, International, Renaissance, Core Equity, Mid-Cap
Equity, Innovation, International Growth, Structured Emerging Markets, and
Tax-Efficient Structured Emerging Markets Funds may invest in EDRs and GDRs.
ADRs are dollar-denominated receipts issued generally by domestic banks and
representing the deposit with the bank of a security of a foreign issuer, and
are publicly traded on exchanges or over-the-counter in the United States.
EDRs are receipts similar to ADRs and are issued and traded in Europe. GDRs
may be offered privately in the United States and also trade in public or
private markets in other countries.
 
  Investing in the securities of issuers in any foreign country involves
special risks and considerations not typically associated with investing in
U.S. companies. Shareholders should consider carefully the substantial risks
involved in investing in securities issued by companies and governments of
foreign nations. These risks include: differences in accounting, auditing and
financial reporting standards; generally higher commission rates on foreign
portfolio transactions; the possibility of nationalization, expropriation or
confiscatory taxation; adverse changes in investment or exchange control
regulations (which may include suspension of the ability to transfer currency
from a country); and political instability which could affect U.S. investments
in foreign countries. Individual foreign economies may differ favorably or
unfavorably from the U.S. economy in such respects as growth of gross domestic
product, rate of inflation, capital reinvestment, resources, self-sufficiency,
and balance of payments position. The securities markets, values of
securities, yields, and risks associated with securities markets may change
independently of each other. Additionally, foreign securities and dividends
and interest payable on those securities may be subject to foreign taxes,
including taxes withheld from payments on those securities. Foreign securities
often trade with less frequency and volume than domestic securities and
therefore may exhibit greater price volatility. Additional costs associated
with an investment in foreign securities may include higher custodial fees
than apply to domestic custodial arrangements and transaction costs of foreign
currency conversions. Changes in foreign exchange rates also will affect the
value of securities denominated or quoted in currencies other than the U.S.
dollar.
 
  A Fund's investments in foreign currency denominated debt obligations and
hedging activities will likely produce a difference between its book income
and its taxable income. This difference may cause a portion of the Fund's
income distributions to constitute returns of capital for tax purposes or
require the Fund to make distributions exceeding book income to qualify as a
regulated investment company for federal tax purposes.
 
  Certain of the Funds and, in particular, the Emerging Markets, Structured
Emerging Markets, and Tax-Efficient Structured Emerging Markets Funds, may
invest in the securities of issuers based in countries with developing
economies. Investing in developing (or "emerging market") countries involves
certain risks not typically associated with investing in U.S. securities, and
imposes risks greater than, or in addition to, risks of investing in foreign,
developed countries. A number of emerging market countries restrict, to
varying degrees, foreign investment in securities. Repatriation of
 

34    PIMCO Funds: Multi-Manager Series

<PAGE>
 
investment income, capital, and the proceeds of sales by foreign investors may
require governmental registration and/or approval in some emerging market
countries. A number of the currencies of emerging market countries have
experienced significant declines against the U.S. dollar in recent years, and
devaluation may occur subsequent to investments in these currencies by a Fund.
Inflation and rapid fluctuations in inflation rates have had, and may continue
to have, negative effects on the economies and securities markets of certain
emerging market countries. Many of the emerging securities markets are
relatively small, have low trading volumes, suffer periods of relative
illiquidity, and are characterized by significant price volatility. There is a
risk in emerging market countries that a future economic or political crisis
could lead to price controls, forced mergers of companies, expropriation or
confiscatory taxation, seizure, nationalization, or creation of government
monopolies, any of which may have a detrimental effect on a Fund's investment.
 
  Additional risks of investing in emerging market countries may include:
currency exchange rate fluctuations; greater social, economic and political
uncertainty and instability (including the risk of war); more substantial
governmental involvement in the economy; less governmental supervision and
regulation of the securities markets and participants in those markets;
unavailability of currency hedging techniques in certain emerging market
countries; the fact that companies in emerging market countries may be newly
organized and may be smaller and less seasoned companies; the difference in,
or lack of, auditing and financial reporting standards, which may result in
unavailability of material information about issuers; the risk that it may be
more difficult to obtain and/or enforce a judgment in a court outside the
United States; and significantly smaller market capitalization of securities
markets. Also, any change in the leadership or politics of emerging market
countries, or the countries that exercise a significant influence over those
countries, may halt the expansion of or reverse the liberalization of foreign
investment policies now occurring and adversely affect existing investment
opportunities.
 
  In addition, emerging securities markets may have different clearance and
settlement procedures, which may be unable to keep pace with the volume of
securities transactions or otherwise make it difficult to engage in such
transactions. Settlement problems may cause a Fund to miss attractive
investment opportunities, hold a portion of its assets in cash pending
investment, or delay in disposing of a portfolio security. Such a delay could
result in possible liability to a purchaser of the security.
 
  Special Risks of Investing in Russian and Other Eastern European Securities
The Emerging Markets, International, International Growth, Structured Emerging
Markets, and Tax-Efficient Structured Emerging Markets Funds may invest a
portion of their assets in securities of issuers located in Russia and in
other Eastern European countries. While investments in securities of such
issuers are subject generally to the same risks associated with investments in
other emerging market countries described above, the political, legal and
operational risks of investing in Russian and other Eastern European issuers,
and of having assets custodied within these countries, may be particularly
acute. A risk of particular note with respect to direct investment in Russian
securities is the way in which ownership of shares of companies is normally
recorded. When a Fund invests in a Russian issuer, it will normally receive a
"share extract," but that extract is not legally determinative of ownership.
The official record of ownership of a company's share is maintained by the
company's share registrar. Such share registrars are completely under the
control of the issuer, and investors are provided with few legal rights
against such registrars. Please refer to "Investment Objectives and Policies--
Foreign Securities" in the Statement of Additional Information for a more
complete description of these and other risks associated with investments in
securities of Russian and other Eastern European issuers.
 
FOREIGN CURRENCY TRANSACTIONS
 
  Foreign currency exchange rates may fluctuate significantly over short
periods of time. They generally are determined by the forces of supply and
demand in the foreign exchange markets and the relative merits of investments


                                               November 1, 1998 Prospectus   35
<PAGE>
 
in different countries, actual or perceived changes in interest rates and
other complex factors, as seen from an international perspective. Currency
exchange rates also can be affected unpredictably by intervention (or the
failure to intervene) by U.S. or foreign governments or central banks, or by
currency controls or political developments in the U.S. or abroad. For
example, significant uncertainty surrounds the proposed introduction of the
euro (a common currency unit for the European Union) in January 1999 and its
effect on the value of securities denominated in local European currencies.
These and other currencies in which the Funds' assets are denominated may be
devalued against the U.S. dollar, resulting in a loss to the Funds. For a more
complete discussion of foreign currency risks (including those associated with
the euro), please see "Investment Objectives and Policies--Foreign Currencies"
in the Statement of Additional Information.
 
  The Emerging Markets, International Developed, International, Renaissance,
Core Equity, Mid-Cap Equity, Innovation, International Growth, Structured
Emerging Markets, Tax-Efficient Structured Emerging Markets, and Balanced
Funds may enter into forward foreign currency exchange contracts to reduce the
risks of adverse changes in foreign exchange rates. In addition, the Emerging
Markets, International Developed, International, International Growth,
Structured Emerging Markets, Tax-Efficient Structured Emerging Markets, and
Balanced Funds may buy and sell foreign currency futures contracts and options
on foreign currencies and foreign currency futures. A forward foreign currency
exchange contract involves an obligation to purchase or sell a specific
currency at a future date, which may be any fixed number of days from the date
of the contract agreed upon by the parties, at a price set at the time of the
contract. By entering into a forward foreign currency exchange contract, the
Fund "locks in" the exchange rate between the currency it will deliver and the
currency it will receive for the duration of the contract. As a result, a Fund
reduces its exposure to changes in the value of the currency it will deliver
and increases its exposure to changes in the value of the currency it will
exchange into. The effect on the value of a Fund is similar to selling
securities denominated in one currency and purchasing securities denominated
in another. Contracts to sell foreign currency would limit any potential gain
which might be realized by a Fund if the value of the hedged currency
increases. A Fund may enter into these contracts for the purpose of hedging
against foreign exchange risk arising from the Fund's investment or
anticipated investment in securities denominated in foreign currencies.
Suitable hedging transactions may not be available in all circumstances and
there can be no assurance that a Fund will engage in such transactions at any
given time or from time to time. Also, such transactions may not be successful
and may eliminate any chance for a Fund to benefit from favorable fluctuations
in relevant foreign currencies. The Emerging Markets, International Developed,
International, International Growth, Structured Emerging Markets, and Tax-
Efficient Structured Emerging Markets Funds also may enter into these
contracts for purposes of increasing exposure to a foreign currency or to
shift exposure to foreign currency fluctuations from one country to another.
To the extent that they do so, the Emerging Markets, International Developed,
International, International Growth, Structured Emerging Markets, and Tax-
Efficient Structured Emerging Markets Funds will be subject to the additional
risk that the relative value of currencies will be different than anticipated
by the particular Fund's Portfolio Manager. These Funds may use one currency
(or a basket of currencies) to hedge against adverse changes in the value of
another currency (or a basket of currencies) when exchange rates between the
two currencies are positively correlated. Each Fund will segregate assets
determined to be liquid by the Adviser or a Portfolio Manager in accordance
with procedures established by the Board of Trustees to cover its obligations
under forward foreign currency exchange contracts entered into for non-hedging
purposes.
 

36   PIMCO Funds: Multi-Manager Series

<PAGE>
 
HIGH YIELD SECURITIES ("JUNK BONDS")
 
  The Renaissance and Balanced Funds may invest a portion of their assets in
fixed income securities rated lower than Baa by Moody's or lower than BBB by
S&P but rated at least B by Moody's or S&P or, if not rated, determined by the
Portfolio Manager to be of comparable quality. In addition, the Renaissance
Fund may invest in convertible securities rated below B by Moody's or S&P (or,
if unrated, considered by the Portfolio Manager to be of comparable quality).
Securities rated lower than Baa by Moody's or lower than BBB by S&P are
sometimes referred to as "high yield" or "junk" bonds. Investors should
consider the risks associated with high yield securities before investing in
these Funds. Although the Renaissance Fund reserves the right to do so at any
time, as of the date of this Prospectus, it does not invest or have the
present intention to invest more than 5% of its assets in high yield
securities or junk bonds.
 
  Investing in high yield securities involves special risks in addition to the
risks associated with investments in higher rated fixed income securities.
While offering a greater potential opportunity for capital appreciation and
higher yields than investments in higher rated debt securities, high yield
securities typically entail greater potential price volatility and may be less
liquid than investment grade debt. High yield securities may be regarded as
predominately speculative with respect to the issuer's continuing ability to
meet principal and interest payments. Analysis of the creditworthiness of
issuers of high yield securities may be more complex than for issuers of
higher quality debt securities, and achievement of a Fund's investment
objective may, to the extent of its investments in high yield securities,
depend more heavily on the Portfolio Manager's creditworthiness analysis than
would be the case if the Fund were investing in higher quality securities.
High yield securities may be more susceptible to real or perceived adverse
economic and competitive industry conditions than higher grade securities.
 
  For additional discussion of the characteristics of lower rated fixed income
securities, see the Statement of Additional Information. Ratings assigned to
fixed income securities are described in the Appendix to the Statement of
Additional Information.
 
DERIVATIVE INSTRUMENTS
 
  To the extent permitted by the investment objective and policies of each
Fund, a Fund may purchase and write call and put options on securities,
securities indexes and foreign currencies, and enter into futures contracts
and use options on futures contracts as further described below. In pursuit of
their investment objectives, the Emerging Markets, International Developed,
International, Renaissance, Core Equity, Mid-Cap Equity, Innovation,
International Growth, Structured Emerging Markets, Tax-Efficient Structured
Emerging Markets, Tax-Efficient Equity, and Balanced Funds may engage in the
purchase and writing of call and put options on securities and enter into
futures contracts and options thereon; each of these Funds, along with the
Enhanced Equity Fund, may engage in the purchase and writing of options on
securities indexes and enter into securities index futures contracts and
options thereon. The Funds that may invest in foreign currency denominated
securities may engage in the purchase and writing of call and put options on
foreign currencies. The Emerging Markets, International Developed, Structured
Emerging Markets, Tax-Efficient Structured Emerging Markets, Tax-Efficient
Equity, and Balanced Funds also may enter into swap agreements with respect to
securities indexes. The Balanced Fund may also enter into swap agreements with
respect to foreign currencies and interest rates. The Funds may (but are not
required to) use these techniques to hedge against changes in interest rates,
foreign currency exchange rates or securities prices; and for the Emerging
Markets, International Developed, International, International Growth,
Structured Emerging Markets, and Tax-Efficient Structured Emerging Markets
Funds, to increase exposure to a foreign currency, to shift exposure to
foreign currency fluctuations from one country to another, or as part of their
overall


                                               November 1, 1998 Prospectus   37
<PAGE>
 
investment strategies. Each Fund will segregate assets determined to be liquid
by the Adviser or a Portfolio Manager in accordance with procedures
established by the Board of Trustees (or, as permitted by applicable
regulation, enter into certain offsetting positions) to cover its obligations
under options, futures, and swaps to limit leveraging of the Fund.
 
  Derivative instruments are considered for these purposes to consist of
securities or other instruments whose value is derived from or related to the
value of some other instrument or asset, and not to include those securities
whose payment of principal and/or interest depends upon cash flows from
underlying assets, such as mortgage-related or asset-backed securities. See
"Mortgage-Related and Other Asset-Backed Securities." The value of some
derivative instruments in which the Funds may invest may be particularly
sensitive to changes in prevailing interest rates, and, like the other
investments of the Funds, the ability of a Fund to successfully utilize these
instruments may depend in part upon the ability of the Portfolio Manager to
forecast interest rates and other economic factors correctly. If the Portfolio
Manager incorrectly forecasts such factors and has taken positions in
derivative instruments contrary to prevailing market trends, the Funds could
be exposed to the risk of loss.
 
  The Funds might not employ any of the strategies described below, and no
assurance can be given that any strategy used will succeed. If the Portfolio
Manager incorrectly forecasts interest rates, market values or other economic
factors in utilizing a derivatives strategy for a Fund, the Fund might have
been in a better position if it had not entered into the transaction at all.
Also, suitable derivative transactions may not be available in all
circumstances. The use of these strategies involves certain special risks,
including a possible imperfect correlation, or even no correlation, between
price movements of derivative instruments and price movements of related
investments. While some strategies involving derivative instruments can reduce
the risk of loss, they can also reduce the opportunity for gain or even result
in losses by offsetting favorable price movements in related investments or
otherwise, due to the possible inability of a Fund to purchase or sell a
portfolio security at a time that otherwise would be favorable or the possible
need to sell a portfolio security at a disadvantageous time because the Fund
is required to maintain asset coverage or offsetting positions in connection
with transactions in derivative instruments, and the possible inability of a
Fund to close out or to liquidate its derivatives positions. In addition, a
Fund's use of such instruments may cause the Fund to realize higher amounts of
short-term capital gains (generally taxed at ordinary income tax rates) than
if the Fund had not used such instruments.
 
  Options on Securities, Securities Indexes, and Currencies Certain Funds may
purchase put options on securities. One purpose of purchasing put options is
to protect holdings in an underlying or related security against a substantial
decline in market value. These Funds may also purchase call options on
securities. One purpose of purchasing call options is to protect against
substantial increases in prices of securities the Fund intends to purchase
pending its ability to invest in such securities in an orderly manner. A Fund
may sell put or call options it has previously purchased, which could result
in a net gain or loss depending on whether the amount realized on the sale is
more or less than the premium and other transaction costs paid on the put or
call option which is sold. A Fund may write a call or put option only if the
option is "covered" by the Fund holding a position in the underlying
securities or by other means which would permit immediate satisfaction of the
Fund's obligation as writer of the option. Prior to exercise or expiration, an
option may be closed out by an offsetting purchase or sale of an option of the
same series.
 
  The purchase and writing of options involves certain risks. During the
option period, the covered call writer has, in return for the premium on the
option, given up the opportunity to profit from a price increase in the
underlying security above the exercise price, but, as long as its obligation
as a writer continues, has retained the risk of loss should the price of the
underlying security decline. The writer of an option has no control over the
time when it may be required to fulfill its obligation as a writer of the
option. Once an option writer has received an exercise notice, it cannot
effect a
 

38    PIMCO Funds: Multi-Manager Series

<PAGE>
 
closing purchase transaction in order to terminate its obligation under the
option and must deliver the underlying security at the exercise price. If a
put or call option purchased by the Fund is not sold when it has remaining
value, and if the market price of the underlying security remains equal to or
greater than the exercise price (in the case of a put), or remains less than
or equal to the exercise price (in the case of a call), the Fund will lose its
entire investment in the option. Also, where a put or call option on a
particular security is purchased to hedge against price movements in a related
security, the price of the put or call option may move more or less than the
price of the related security. There can be no assurance that a liquid market
will exist when a Fund seeks to close out an option position. Furthermore, if
trading restrictions or suspensions are imposed on the options markets, a Fund
may be unable to close out a position.
 
  For each of the International, Renaissance, Innovation, and International
Growth Funds, in the case of a written call option on a securities index, the
Fund will own corresponding securities whose historic volatility correlates
with that of the index.
 
  The Emerging Markets, International Developed, International, Core Equity,
Mid-Cap Equity, International Growth, Structured Emerging Markets, Tax-
Efficient Structured Emerging Markets, and Balanced Funds may buy or sell put
and call options on foreign currencies as a hedge against changes in the value
of the U.S. dollar (or another currency) in relation to a foreign currency in
which a Fund's securities may be denominated. Currency options traded on U.S.
or other exchanges may be subject to position limits which may limit the
ability of a Fund to reduce foreign currency risk using such options.
 
  Over-the-counter options in which certain Funds may invest differ from
traded options in that they are two-party contracts, with price and other
terms negotiated between buyer and seller, and generally do not have as much
market liquidity as exchange-traded options. The Funds may be required to
treat as illiquid over-the-counter options purchased and securities being used
to cover certain written over-the-counter options.
 
  Swap Agreements The Emerging Markets, International Developed, Structured
Emerging Markets, Tax-Efficient Structured Emerging Markets, and Tax-Efficient
Equity Funds may enter into equity index swap agreements for purposes of
gaining exposure to the stocks making up an index of securities without
actually purchasing those stocks. The Balanced Fund may enter into swap
agreements to hedge against changes in interest rates, foreign currency
exchange rates or securities prices. Swap agreements are two-party contracts
entered into primarily by institutional investors for periods ranging from a
few weeks to more than one year. In a standard swap transaction, two parties
agree to exchange the returns (or differentials in rates of return) earned or
realized on particular predetermined investments or instruments, which may be
adjusted for an interest factor. The gross returns to be exchanged or
"swapped" between the parties are generally calculated with respect to a
"notional amount," i.e., the return on or increase in value of a particular
dollar amount invested at a particular interest rate, or in a "basket" of
securities representing a particular index.
 
  Most swap agreements entered into by the Funds calculate the obligations of
the parties to the agreement on a "net basis." Consequently, a Fund's current
obligations (or rights) under a swap agreement will generally be equal only to
the net amount to be paid or received under the agreement based on the
relative values of the positions held by each party to the agreement (the "net
amount"). A Fund's current obligations under a swap agreement will be accrued
daily (offset against amounts owed to the Fund), and any accrued but unpaid
net amounts owed to a swap counterparty will be covered by the segregation of
assets determined to be liquid by the Portfolio Manager in accordance with
procedures established by the Board of Trustees to limit any potential
leveraging of the Fund's portfolio. Obligations under swap agreements so
covered will not be construed to be "senior securities" for purposes of a
Fund's investment restriction


                                               November 1, 1998 Prospectus   39
<PAGE>
 
concerning senior securities. A Fund will not enter into a swap agreement with
any single party if the net amount owed or to be received under existing
contracts with that party would exceed 5% of the Fund's assets.
 
  Whether a Fund's use of swap agreements will be successful in furthering its
investment objective will depend on the Portfolio Manager's ability to predict
correctly whether certain types of investments are likely to produce greater
returns than other investments. Because they are two-party contracts and
because they may have terms of greater than seven days, swap agreements may be
considered to be illiquid investments. Moreover, a Fund bears the risk of loss
of the amount expected to be received under a swap agreement in the event of
the default or bankruptcy of a swap agreement counterparty. The Funds will
enter into swap agreements only with counterparties that meet certain
standards for creditworthiness (generally, such counterparties would have to
be eligible counterparties under the terms of the Funds' repurchase agreement
guidelines). The swaps market is a relatively new market and is largely
unregulated. It is possible that developments in the swaps market, including
potential government regulation, could adversely affect a Fund's ability to
terminate existing swap agreements or to realize amounts to be received under
such agreements.
 
  Futures Contracts and Options on Futures Contracts Certain Funds may enter
into futures contracts and options thereon. The Balanced Fund may invest in
interest rate futures contracts and options thereon. The Emerging Markets,
International Developed, International, Core Equity, Mid-Cap Equity,
International Growth, Structured Emerging Markets, Tax-Efficient Structured
Emerging Markets, and Balanced Funds may invest in foreign exchange futures
contracts and options thereon ("futures options") that are traded on a U.S. or
foreign exchange or board of trade, or similar entity, or quoted on an
automated quotation system. These Funds may engage in such futures
transactions as an adjunct to their securities activities.
 
  There are several risks associated with the use of futures and futures
options for hedging purposes. There can be no guarantee that there will be a
correlation between price movements in the hedging vehicle and in the
portfolio securities being hedged. An incorrect correlation could result in a
loss on both the hedged securities in a Fund and the hedging vehicle, so that
the portfolio return might have been greater had hedging not been attempted.
There can be no assurance that a liquid market will exist at a time when a
Fund seeks to close out a futures contract or a futures option position. Most
futures exchanges and boards of trade limit the amount of fluctuation
permitted in futures contract prices during a single day; once the daily limit
has been reached on a particular contract, no trades may be made that day at a
price beyond that limit. In addition, certain of these instruments are
relatively new and without a significant trading history. As a result, there
is no assurance that an active secondary market will develop or continue to
exist. Lack of a liquid market for any reason may prevent a Fund from
liquidating an unfavorable position, and the Fund would remain obligated to
meet margin requirements until the position is closed.
 
  Index Futures The Emerging Markets, International Developed, International,
Renaissance, Core Equity, Mid-Cap Equity, Innovation, International Growth,
Enhanced Equity, Structured Emerging Markets, Tax-Efficient Structured
Emerging Markets, Tax-Efficient Equity, and Balanced Funds may purchase and
sell futures contracts on various securities indexes ("Index Futures") and
related options for hedging purposes and for investment purposes. A Fund's
purchase and sale of Index Futures is limited to contracts and exchanges which
have been approved by the Commodity Futures Trading Commission ("CFTC").
 
  Each of the Emerging Markets, International Developed, International,
International Growth, Structured Emerging Markets, and Tax-Efficient
Structured Emerging Markets Funds may invest to a significant degree in Index
Futures on stock indexes and related options (including those which may trade
outside of the United States) as an alternative to purchasing individual
stocks in order to adjust the Fund's exposure to a particular market. These
Funds may invest in
 

40    PIMCO Funds: Multi-Manager Series

<PAGE>
 
Index Futures and related options when a Portfolio Manager believes that there
are not enough attractive securities available to maintain the standards of
diversification and liquidity set for a Fund pending investment in such
securities if or when they do become available. Through the use of Index
Futures and related options, a Fund may diversify risk in its portfolio
without incurring the substantial brokerage costs which may be associated with
investment in the securities of multiple issuers. A Fund may also avoid
potential market and liquidity problems which may result from increases in
positions already held by the Fund.
 
  A Fund may close open positions on the futures exchanges on which Index
Futures are traded at any time up to and including the expiration day. All
positions which remain open at the close of the last business day of the
contract's life are required to settle on the next business day (based upon
the value of the relevant index on the expiration day), with settlement made
with the appropriate clearing house. Because the specific procedures for
trading foreign stock Index Futures on futures exchanges are still under
development, additional or different margin requirements as well as settlement
procedures may be applicable to foreign stock Index Futures at the time a Fund
purchases such instruments.
 
  Positions in Index Futures may be closed out by a Fund only on the futures
exchanges upon which the Index Futures are then traded. There can be no
assurance that a liquid market will exist for any particular contract at any
particular time. Also, the price of Index Futures may not correlate perfectly
with movement in the relevant index due to certain market distortions. First,
all participants in the futures market are subject to margin deposit and
maintenance requirements. Rather than meeting additional margin deposit
requirements, investors may close futures contracts through offsetting
transactions which could distort the normal relationship between the index and
futures markets. Second, the deposit requirements in the futures market are
less onerous than margin requirements in the securities market, and as a
result, the futures market may attract more speculators than does the
securities market. Increased participation by speculators in the futures
market may also cause temporary price distortions. In addition, trading hours
for foreign stock Index Futures may not correspond perfectly to hours of
trading on the foreign exchange to which a particular foreign stock Index
Future relates. This may result in a disparity between the price of Index
Futures and the value of the relevant index due to the lack of continuous
arbitrage between the Index Futures price and the value of the underlying
index.
 
  The Funds may only enter into futures contracts or futures options which are
standardized and traded on a U.S. or foreign exchange or board of trade, or
similar entity, or quoted on an automated quotation system. Each Fund may use
futures contracts and related options for "bona fide hedging" purposes, as
such term is defined in applicable regulations of the CFTC, or, with respect
to positions in futures and related options that do not qualify as "bona fide
hedging" positions, may enter such positions only to the extent that aggregate
initial margin deposits plus premiums paid by it for open futures option
positions, less the amount by which any such positions are "in-the-money,"
would not exceed 5% of the Fund's net assets.
 
SHORT SALES
 
  Each Fund may from time to time make short sales involving securities held
in the Fund's portfolio or which the Fund has the right to acquire without the
payment of further consideration. For these purposes, a Fund may also hold or
have the right to acquire securities which, without the payment of any further
consideration, are convertible into or exchangeable for the securities sold
short. Short sales expose the Fund to the risk that it will be required to
acquire, convert or exchange securities to cover its short position at a time
when the securities sold short have appreciated in value, thus resulting in a
loss to the Fund.


                                               November 1, 1998 Prospectus   41
<PAGE>
 
WHEN-ISSUED, DELAYED DELIVERY AND FORWARD COMMITMENT TRANSACTIONS
 
  Each Fund may purchase securities which it is eligible to purchase on a
when-issued basis, may purchase and sell such securities for delayed delivery
and may make contracts to purchase securities for a fixed price at a future
date beyond normal settlement time (forward commitments). When-issued
transactions, delayed delivery purchases and forward commitments involve a
risk of loss if the value of the securities declines prior to the settlement
date, which risk is in addition to the risk of decline in the value of the
Fund's other assets. Typically, no income accrues on securities a Fund has
committed to purchase prior to the time delivery of the securities is made,
although a Fund may earn income on securities it has segregated.
 
MORTGAGE-RELATED AND OTHER ASSET-BACKED SECURITIES
 
  All Funds that may purchase debt securities for investment purposes (and in
particular the Balanced Fund) may invest in mortgage-related securities, and
in other asset-backed securities (unrelated to mortgage loans) that are
offered to investors currently or in the future. The value of some mortgage-
related or asset-backed securities in which the Funds invest may be
particularly sensitive to changes in prevailing interest rates, and, like
other fixed income investments, the ability of a Fund to successfully utilize
these instruments may depend in part upon the ability of the Portfolio Manager
to forecast interest rates and other economic factors correctly.
 
  Mortgage Pass-Through Securities are securities representing interests in
"pools" of mortgage loans secured by residential or commercial real property
in which payments of both interest and principal on the securities are
generally made monthly, in effect "passing through" monthly payments made by
the individual borrowers on the mortgage loans which underlie the securities
(net of fees paid to the issuer or guarantor of the securities). Early
repayment of principal on some mortgage-related securities (arising from
prepayments of principal due to sale of the underlying property, refinancing,
or foreclosure, net of fees and costs which may be incurred) may expose a Fund
to a lower rate of return upon reinvestment of principal. Also, if a security
subject to prepayment has been purchased at a premium, the value of the
premium would be lost in the event of prepayment. Like other fixed income
securities, when interest rates rise, the value of a mortgage-related security
generally will decline; however, when interest rates are declining, the value
of mortgage-related securities with prepayment features may not increase as
much as other fixed income securities. The rate of prepayments on underlying
mortgages will affect the price and volatility of a mortgage-related security,
and may have the effect of shortening or extending the effective maturity of
the security beyond what was anticipated at the time of purchase. To the
extent that unanticipated rates of prepayment on underlying mortgages increase
the effective maturity of a mortgage-related security, the volatility of such
security can be expected to increase.
 
  Payment of principal and interest on some mortgage pass-through securities
(but not the market value of the securities themselves) may be guaranteed by
the full faith and credit of the U.S. Government (in the case of securities
guaranteed by the Government National Mortgage Association ("GNMA")); or
guaranteed by agencies or instrumentalities of the U.S. Government (in the
case of securities guaranteed by the Federal National Mortgage Association
("FNMA") or the Federal Home Loan Mortgage Corporation ("FHLMC"), which are
supported only by the discretionary authority of the U.S. Government to
purchase the agency's obligations). Mortgage-related securities created by
non-governmental issuers (such as commercial banks, savings and loan
institutions, private mortgage insurance companies, mortgage bankers and other
secondary market issuers) may be supported by various forms of insurance or
guarantees, including individual loan, title, pool and hazard insurance and
letters of credit, which may be issued by governmental entities, private
insurers or the mortgage poolers.
 

42    PIMCO Funds: Multi-Manager Series

<PAGE>
 
  Collateralized Mortgage Obligations ("CMOs") are hybrid mortgage-related
instruments. Similar to a bond, interest and pre-paid principal on a CMO are
paid, in most cases, on a monthly basis. CMOs may be collateralized by whole
mortgage loans but are more typically collateralized by portfolios of mortgage
pass-through securities guaranteed by GNMA, FHLMC, or FNMA. CMOs are
structured into multiple classes, with each class bearing a different stated
maturity. Monthly payments of principal, including prepayments, are first
returned to investors holding the shortest maturity class; investors holding
the longer maturity classes receive principal only after the first class has
been retired. CMOs that are issued or guaranteed by the U.S. Government or by
any of its agencies or instrumentalities will be considered U.S. Government
securities by a Fund, while other CMOs, even if collateralized by U.S.
Government securities, will have the same status as other privately issued
securities for purposes of applying a Fund's diversification tests.
 
  Commercial Mortgage-Backed Securities include securities that reflect an
interest in, and are secured by, mortgage loans on commercial real property.
The market for commercial mortgage-backed securities developed more recently
and in terms of total outstanding principal amount of issues is relatively
small compared to the market for residential single-family mortgage-backed
securities. Many of the risks of investing in commercial mortgage-backed
securities reflect the risks of investing in the real estate securing the
underlying mortgage loans. These risks reflect the effects of local and other
economic conditions on real estate markets, the ability of tenants to make
loan payments, and the ability of a property to attract and retain tenants.
Commercial mortgage-backed securities may be less liquid and exhibit greater
price volatility than other types of mortgage-related or asset-backed
securities.
 
  Mortgage-Related Securities include securities other than those described
above that directly or indirectly represent a participation in, or are secured
by and payable from, mortgage loans on real property, such as CMO residuals or
stripped mortgage-backed securities ("SMBS"), and may be structured in classes
with rights to receive varying proportions of principal and interest.
 
  A common type of SMBS will have one class receiving some of the interest and
most of the principal from the mortgage assets, while the other class will
receive most of the interest and the remainder of the principal. In the most
extreme case, one class will receive all of the interest (the interest-only,
or "IO" class), while the other class will receive all of the principal (the
principal-only, or "PO" class). The yield to maturity on an IO class is
extremely sensitive to the rate of principal payments (including prepayments)
on the related underlying mortgage assets, and a rapid rate of principal
payments may have a material adverse effect on a Fund's yield to maturity from
these securities. For a discussion of the characteristics of some of these
instruments, see the Statement of Additional Information.
 
CONVERTIBLE SECURITIES
 
  Many of the Funds may invest in convertible securities. Convertible
securities are generally preferred stocks or fixed income securities that are
convertible into common stock at either a stated price or a stated rate. The
price of the convertible security will normally vary in some proportion to
changes in the price of the underlying common stock because of this conversion
feature. A convertible security will normally also provide a fixed income
stream. For this reason, the convertible security may not decline in price as
rapidly as the underlying common stock.
 
  A Fund's Portfolio Manager will select convertible securities to be
purchased by the Fund based primarily upon its evaluation of the fundamental
investment characteristics and growth prospects of the issuer of the security.
As a fixed income security, a convertible security tends to increase in market
value when interest rates decline and to decrease in


                                               November 1, 1998 Prospectus   43
<PAGE>
 
value when interest rates rise. While convertible securities generally offer
lower interest or dividend yields than non-convertible fixed income securities
of similar quality, their value tends to increase as the market value of the
underlying stock increases and to decrease when the value of the underlying
stock decreases.
 
  The Renaissance Fund may invest in so-called "synthetic convertible
securities," which are composed of two or more different securities whose
investment characteristics, taken together, resemble those of convertible
securities. For example, the Renaissance Fund may purchase a non-convertible
debt security and a warrant or option. The synthetic convertible differs from
the true convertible security in several respects. Unlike a true convertible
security, which is a single security having a unitary market value, a
synthetic convertible comprises two or more separate securities, each with its
own market value. Therefore, the "market value" of a synthetic convertible is
the sum of the values of its fixed income component and its convertible
component. For this reason, the values of a synthetic convertible and a true
convertible security may respond differently to market fluctuations.
 
INVESTMENT IN INVESTMENT COMPANIES
 
  The Emerging Markets, International Developed, International, and
International Growth Funds may each invest up to 10% of its assets in
securities of other investment companies, such as closed-end management
investment companies, or in pooled accounts or other investment vehicles which
invest in foreign markets. As a shareholder of an investment company, these
Funds may indirectly bear service and other fees which are in addition to the
fees the Funds pay their service providers.
 
CREDIT AND MARKET RISK OF FIXED INCOME SECURITIES
 
  All fixed income securities are subject to market risk and credit risk.
Market risk relates to market-induced changes in a security's value, usually
as a result of changes in interest rates. The value of a Fund's investments in
fixed income securities will change as the general level of interest rates
fluctuate. During periods of falling interest rates, the value of a Fund's
fixed income securities generally rise. Conversely, during periods of rising
interest rates, the value of a Fund's fixed income securities generally
decline. Credit risk relates to the ability of the issuer to make payments of
principal and interest.
 
MONEY MARKET INSTRUMENTS
 
  Each of the Funds may invest at least a portion of its assets in the
following kinds of money market instruments:
 
    (1) short-term U.S. Government securities;
 
    (2) certificates of deposit, bankers' acceptances and other bank
        obligations rated in the two highest rating categories by at least
        two NRSROs, or, if rated by only one NRSRO, in such agency's two
        highest grades, or, if unrated, determined to be of comparable
        quality by the Adviser or a Portfolio Manager. Bank obligations
        must be those of a bank that has deposits in excess of $2 billion
        or that is a member of the Federal Deposit Insurance Corporation. A
        Fund may invest in obligations of U.S. branches or subsidiaries of
        foreign banks ("Yankee dollar obligations") or foreign branches of
        U.S. banks ("Eurodollar obligations");
 
    (3) commercial paper rated in the two highest rating categories by at
        least two NRSROs, or, if rated by only one NRSRO, in such agency's
        two highest grades, or, if unrated, determined to be of comparable
        quality by the Adviser or a Portfolio Manager;
 

44    PIMCO Funds: Multi-Manager Series
<PAGE>
 
    (4) corporate obligations with a remaining maturity of 397 days or less
        whose issuers have outstanding short-term debt obligations rated in
        the highest rating category by at least two NRSROs, or, if rated by
        only one NRSRO, in such agency's highest grade, or, if unrated,
        determined to be of comparable quality by the Adviser or a
        Portfolio Manager; and
 
    (5) repurchase agreements with domestic commercial banks or registered
        broker-dealers.
 
ILLIQUID SECURITIES
 
  Each Fund may invest in securities that are illiquid so long as no more than
15% of the net assets of the Fund (taken at market value at the time of
investment) would be invested in such securities. Certain illiquid securities
may require pricing at fair value as determined in good faith under the
supervision of the Board of Trustees. A Portfolio Manager may be subject to
significant delays in disposing of illiquid securities, and transactions in
illiquid securities may entail registration expenses and other transaction
costs that are higher than those for transactions in liquid securities.
 
  The term "illiquid securities" for this purpose means securities that cannot
be disposed of within seven days in the ordinary course of business at
approximately the amount at which a Fund has valued the securities. Illiquid
securities are considered to include, among other things, written over-the-
counter options, securities or other liquid assets being used as cover for
such options, repurchase agreements with maturities in excess of seven days,
certain loan participation interests, fixed time deposits which are not
subject to prepayment or provide for withdrawal penalties upon prepayment
(other than overnight deposits), securities that are subject to legal or
contractual restrictions on resale (such as privately placed debt securities),
and other securities which legally or in the Adviser's or a Portfolio
Manager's opinion may be deemed illiquid (not including securities issued
pursuant to Rule 144A under the Securities Act of 1933 and certain commercial
paper that the Adviser or a Portfolio Manager has determined to be liquid
under procedures approved by the Board of Trustees).
 
SERVICE SYSTEMS -- YEAR 2000 PROBLEM
 
  Many of the services provided to the Funds depend on the smooth functioning
of computer systems. Many systems in use today cannot distinguish between the
year 1900 and the year 2000. Should any of the service systems fail to process
information properly, that could have an adverse impact on the Funds'
operations and services provided to shareholders. The Adviser, Distributor,
Shareholder Servicing and Transfer Agent, Custodian, and certain other service
providers to the Funds have reported that each is working toward mitigating
the risks associated with the so-called "year 2000 problem." However, there
can be no assurance that the problem will be corrected in all respects and
that the Funds' operations and services provided to shareholders will not be
adversely affected, nor can there be any assurance that the year 2000 problem
will not have an adverse effect on the entities whose securities are held by
the Funds or on domestic or global equity markets or economies, generally.
 
"FUNDAMENTAL" POLICIES
 
  The investment objective of each of the International, Renaissance,
Innovation, International Growth, Value 25, Tax-Efficient Structured Emerging
Markets, and Tax-Efficient Equity Funds described in this Prospectus may be
changed by the Board of Trustees without shareholder approval. The investment
objective of each other Fund is fundamental and may not be changed without
shareholder approval by vote of a majority of the outstanding shares of that
Fund. If there is a change in a Fund's investment objective, including a
change approved by shareholder vote, shareholders should consider whether the
Fund remains an appropriate investment in light of their then current
financial position and needs.


                                               November 1, 1998 Prospectus   45
<PAGE>
 
                            MANAGEMENT OF THE TRUST
 
  The business affairs of the Trust are managed under the direction of the
Board of Trustees. Information about the Trustees and the Trust's executive
officers may be found in the Statement of Additional Information under the
heading "Management of the Trust."
 
INVESTMENT ADVISER
 
  PIMCO Advisors serves as investment adviser to the Funds pursuant to an
investment advisory agreement with the Trust. PIMCO Advisors is a Delaware
limited partnership organized in 1987. PIMCO Advisors provides investment
management and advisory services to private accounts of institutional and
individual clients and to mutual funds. Total assets under management by PIMCO
Advisors and its subsidiary partnerships as of September 30, 1998 were
approximately $225.9 billion. The general partners of PIMCO Advisors are PIMCO
Partners, G.P. and PIMCO Advisors Holdings L.P. ("PAH"). PIMCO Partners, G.P.
is a general partnership between PIMCO Holding LLC, a Delaware limited
liability company and an indirect wholly-owned subsidiary of Pacific Life
Insurance Company, and PIMCO Partners LLC, a California limited liability
company controlled by the current Managing Directors and two former Managing
Directors of Pacific Investment Management. PIMCO Partners, G.P. is the sole
general partner of PAH. PIMCO Advisors is governed by a Management Board,
which exercises substantially all of the governance powers of the general
partner and serves as the functional equivalent of a board of directors. PIMCO
Advisors' address is 800 Newport Center Drive, Newport Beach, California
92660. PIMCO Advisors is registered as an investment adviser with the SEC.
PIMCO Advisors currently has seven subsidiary investment adviser partnerships,
the following six of which manage one or more of the Funds: Blairlogie,
Cadence, Columbus Circle, NFJ, Pacific Investment Management, and Parametric.
On or before March 31, 1999, it is anticipated that PIMCO Advisors will sell
substantially all of its ownership interest in Blairlogie. See "Portfolio
Managers--Blairlogie" below.
 
  Under the investment advisory agreement, PIMCO Advisors, subject to the
supervision of the Board of Trustees, is responsible for providing advice and
guidance with respect to the Funds and for managing, either directly or
through others selected by the Adviser, the investment of the Funds. PIMCO
Advisors also furnishes to the Board of Trustees periodic reports on the
investment performance of each Fund.
 
PORTFOLIO MANAGERS
 
  Pursuant to portfolio management agreements, PIMCO Advisors employs
Portfolio Managers for all of the Funds. Each Portfolio Manager is an
affiliate of PIMCO Advisors. PIMCO Advisors (and not the Funds or the Trust)
compensates the Portfolio Managers from its advisory fee. Under these
agreements, a Portfolio Manager has full investment discretion and makes all
determinations with respect to the investment of a Fund's assets, or, for the
Balanced Fund, with respect to the portion of the Fund's assets allocated to
the Portfolio Manager for investment, and makes all determinations respecting
the purchase and sale of a Fund's securities and other investments. If a
Portfolio Manager ceases to manage the portfolio of a Fund, PIMCO Advisors
will either assume full responsibility for the management of that Fund, or
retain a new portfolio manager subject to the approval of the Trustees and the
Fund's shareholders.
 
  BLAIRLOGIE manages the Emerging Markets, International Developed, and
International Funds (the "Blairlogie Funds"). Blairlogie is an investment
management firm, organized as a limited partnership under the laws of the
United Kingdom, with two general partners and one limited partner. The general
partners are PIMCO Advisors, which serves as the supervisory partner, and
Blairlogie Holdings Limited, a wholly owned subsidiary of PIMCO Advisors,
which serves as the managing partner. The limited partner is Blairlogie
Partners L.P., a limited partnership, the general partner of which
 

46   PIMCO Funds: Multi-Manager Series
<PAGE>
 
is Pacific Asset Management LLC (a subsidiary of Pacific Life Insurance
Company), and the limited partners of which are the principal executive
officers of Blairlogie Capital Management. Blairlogie Capital Management Ltd.,
the predecessor investment adviser to Blairlogie, commenced operations in
1992. Accounts managed by Blairlogie had combined assets as of September 30,
1998 of approximately $700 million. Blairlogie's address is 4th Floor, 125
Princes Street, Edinburgh EH2 4AD, Scotland. Blairlogie is registered as an
investment adviser with the SEC in the United States and with the Investment
Management Regulatory Organisation ("IMRO") in the United Kingdom.
 
  James Smith is primarily responsible for the day-to-day management of the
Blairlogie Funds. Mr. Smith is a Managing Director and the Chief Investment
Officer of Blairlogie and is responsible for managing an investment team of
six professionals who, in turn, specialize in selection of stocks within
Europe, Asia, and the Americas, and in currency and derivatives. He previously
served as a Senior Portfolio Manager at Murray Johnstone in Glasgow, Scotland,
responsible for international investment management for North American
clients, and at Schroder Investment Management in London. Mr. Smith received
his bachelor's degree in Economics from London University and his MBA from
Edinburgh University. He is an Associate of the Institute of Investment
Management and Research.
 
  It is anticipated that PIMCO Advisors will sell substantially all of its
ownership interest in Blairlogie to Alleghany Asset Management, Inc. on or
before March 31, 1999 (the "Blairlogie Transaction"). The Blairlogie
Transaction is subject to a number of conditions, including approval by the
shareholders of the Emerging Markets and International Developed Funds.
 
  In connection with the anticipated Blairlogie Transaction, it is proposed
that the Emerging Markets and International Developed Funds (the "Transferring
Funds") will transfer all of their assets and liabilities to newly formed
series of Alleghany Funds to be managed by Blairlogie (the proposed
transactions are referred to as "Reorganizations"). The proposed
Reorganizations are subject to a number of conditions, including approval by
the Trust's Board of Trustees and the shareholders of the Transferring Funds.
 
  In addition, PIMCO Advisors has determined to terminate its portfolio
management agreement with Blairlogie with respect to the International Fund,
effective on or about the date of the Blairlogie Transaction. Under the
Trust's investment advisory agreement, PIMCO Advisors would then assume full
responsibility for managing the International Fund's portfolio.
 
  This Prospectus will be supplemented or revised if any of these events
involving Blairlogie and the Blairlogie Funds do not occur substantially in
accordance with the schedule outlined above.
 
  CADENCE manages the Capital Appreciation, Mid-Cap Growth, Micro-Cap Growth,
and Small-Cap Growth Funds, as well as a portion of the Common Stock Segment
of the Balanced Fund (the "Cadence Funds"). Cadence is an investment
management firm organized as a general partnership. Cadence has two partners:
PIMCO Advisors as the supervisory partner, and Cadence Capital Management Inc.
as the managing partner. Cadence Capital Management Corporation, the
predecessor investment adviser to Cadence, commenced operations in 1988.
Accounts managed by Cadence had combined assets as of September 30, 1998 of
approximately $6.1 billion. Cadence's address is Exchange Place, 53 State
Street, Boston, Massachusetts 02109. Cadence is registered as an investment
adviser with the SEC.
 
  David B. Breed, William B. Bannick, Katherine A. Burdon, and Peter B.
McManus are primarily responsible for the day-to-day management of the Cadence
Funds. Mr. Breed is a Managing Director, the Chief Executive Officer, and a
founding partner of Cadence, and has 25 years' investment management
experience. He has been the driving force in


                                               November 1, 1998 Prospectus   47
<PAGE>
 
developing the firm's growth-oriented stock screening and selection process
and has been with Cadence (or its predecessor) since its inception. Mr. Breed
graduated from the University of Massachusetts and received his MBA from the
Wharton School of Business. He is a Chartered Financial Analyst. Mr. Bannick
is a Managing Director and Executive Vice President of Cadence and has 13
years' investment management experience. He previously served as Executive
Vice President of George D. Bjurman & Associates and as Supervising Portfolio
Manager of Trinity Investment Management Corporation. Mr. Bannick joined the
predecessor of Cadence in 1992. He graduated from the University of
Massachusetts and received his MBA from Boston University. Mr. Bannick is a
Chartered Financial Analyst. Ms. Burdon is a Managing Director and Portfolio
Manager of Cadence and has 10 years' investment management experience. She
previously served as a Vice President and Portfolio Manager of The Boston
Company. Ms. Burdon joined the predecessor of Cadence in 1993. She graduated
from Stanford University and received a Master of Science degree from
Northeastern University. Ms. Burdon is a Chartered Financial Analyst and
Certified Public Accountant. Mr. McManus is Director of Fund Management of
Cadence and has 21 years' investment management experience. He previously
served as a Vice President of Bank of Boston. Mr. McManus joined Cadence in
1994. He graduated from the University of Massachusetts, and he is certified
as a Financial Planner.
 
  COLUMBUS CIRCLE manages the Renaissance, Core Equity, Mid-Cap Equity,
Innovation, and International Growth Funds (the "Columbus Circle Funds").
Columbus Circle is an investment management firm organized as a general
partnership. Columbus Circle has two partners: PIMCO Advisors as the
supervisory partner, and Columbus Circle Investors Management Inc. as the
managing partner. Columbus Circle Investors Division of Thomson Advisory Group
L.P. ("TAG"), the predecessor investment adviser to Columbus Circle, commenced
operations in 1975. Accounts managed by Columbus Circle had combined assets as
of September 30, 1998 of approximately $7.8 billion. Columbus Circle's address
is Metro Center, One Station Place, 8th Floor, Stamford, Connecticut 06902.
Columbus Circle is registered as an investment adviser with the SEC.
 
  At the center of Columbus Circle's equity investment strategy is its theory
of Positive Momentum & Positive Surprise. This theory asserts that a good
company doing better than generally expected will experience a rise in its
stock price. And, conversely, a company falling short of expectations will
experience a drop in its stock price. Based on this theory, Columbus Circle
attempts to manage the Columbus Circle Funds with a view to investing in
growing companies that are surprising the market with business results that
are better than anticipated.
 
  Investment decisions made by Columbus Circle are generally made by one or
more committees, although the following individuals have primary
responsibility for the noted Columbus Circle Funds. Clifford G. Fox is
primarily responsible for the day-to-day management of the Renaissance and
International Growth Funds. Mr. Fox, a Managing Director of Columbus Circle,
has 17 years of investment management experience. He received his bachelor's
degree from the University of Pennsylvania and his MBA from New York
University, and he is a Chartered Financial Analyst. Anthony Rizza is
primarily responsible for the day-to-day management of the Core Equity Fund.
Mr. Rizza, a Managing Director of Columbus Circle, has 12 years of investment
management experience. He received his bachelor's degree from the University
of Connecticut, and he is a Chartered Financial Analyst. Amy H. Hogan is
primarily responsible for the day-to-day management of the Mid-Cap Equity
Fund. Ms. Hogan, a Managing Director of Columbus Circle, has 13 years of
investment management experience. She received her bachelor's degree and MBA
from the University of Wisconsin, and she is a Chartered Financial Analyst.
Anthony Rizza (see above) and Dennis P. McKechnie are primarily responsible
for the day-to-day management of the Innovation Fund. Mr. McKechnie, a
research analyst at Columbus Circle, has 7 years of investment management
experience. He received his bachelor's degree from Purdue University and his
MBA from Columbia University.
 

48    PIMCO Funds: Multi-Manager Series
<PAGE>
 
  NFJ manages the Equity Income, Value, Value 25, and Small-Cap Value Funds,
as well as a portion of the Common Stock Segment of the Balanced Fund. NFJ is
an investment management firm organized as a general partnership. NFJ has two
partners: PIMCO Advisors as the supervisory partner, and NFJ Management Inc.
as the managing partner. NFJ Investment Group, Inc., the predecessor
investment adviser to NFJ, commenced operations in 1989. Accounts managed by
NFJ had combined assets as of September 30, 1998 of approximately $2.2
billion. NFJ's address is 2121 San Jacinto, Suite 1840, Dallas, Texas 75201.
NFJ is registered as an investment adviser with the SEC.
 
  Chris Najork and Benjamin Fischer are responsible for the day-to-day
management of the Equity Income Fund, and the portion of the Common Stock
Segment of the Balanced Fund allocated to NFJ. Mr. Najork is a Managing
Director and a founding partner of NFJ and has 30 years' experience
encompassing equity research and portfolio management. He received his
bachelor's degree and MBA from Southern Methodist University, and he is a
Chartered Financial Analyst. Mr. Fischer is a Managing Director and a founding
partner of NFJ and has 32 years' experience encompassing equity research and
portfolio management. He received his bachelor's degree from Oklahoma
University and his MBA from the New York University Graduate School of
Business. He is a Chartered Financial Analyst. Messrs. Najork, Fischer and
Paul A. Magnuson are primarily responsible for the day-to-day management of
the Value Fund and the Small-Cap Value Fund. Mr. Magnuson, a research analyst
at NFJ, has 13 years' experience in equity research and portfolio management.
He received his bachelor's degree in Finance from the University of Nebraska-
Lincoln. Messrs. Najork, Fischer, and Cliff Hoover are primarily responsible
for the day-to-day management of the Value 25 Fund. Mr. Hoover is a principal
at NFJ and has 24 years' experience in portfolio management and banking. He
received his bachelor's degree and MBA from Texas Tech University. He is a
Chartered Financial Analyst.
 
  PACIFIC INVESTMENT MANAGEMENT manages the Fixed Income Securities Segment of
the Balanced Fund. Pacific Investment Management is an investment management
firm organized as a general partnership. Pacific Investment Management has two
partners: PIMCO Advisors as the supervisory partner, and PIMCO Management,
Inc. as the managing partner. Pacific Investment Management Company, the
predecessor investment adviser to Pacific Investment Management, commenced
operations in 1971. Pacific Investment Management had approximately $148.1
billion of assets under management as of September 30, 1998. Pacific
Investment Management's address is 840 Newport Center Drive, Suite 300,
Newport Beach, California 92660. Pacific Investment Management is registered
as an investment adviser with the SEC and as a commodity trading advisor with
the CFTC.
 
  William H. Gross is responsible for the day-to-day management of the Fixed
Income Securities Segment of the Balanced Fund. Mr. Gross is a founder and a
Managing Director of Pacific Investment Management and has been associated
with Pacific Investment Management or its predecessor for more than 28 years.
He has extensive investment experience in both credit research and fixed
income portfolio management. He received his bachelor's degree from Duke
University and his MBA from UCLA Graduate School of Business. Mr. Gross is a
Chartered Financial Analyst and a member of The Los Angeles Society of
Financial Analysts.
 
  PARAMETRIC manages the Enhanced Equity, Structured Emerging Markets, Tax-
Efficient Structured Emerging Markets, and Tax-Efficient Equity Funds (the
"Parametric Funds"). Parametric is an investment management firm organized as
a general partnership. Parametric has two partners: PIMCO Advisors as the
supervisory partner, and Parametric Management Inc. as the managing partner.
Parametric Portfolio Associates, Inc., the predecessor investment adviser to
Parametric, commenced operations in 1987. Accounts managed by Parametric had
combined assets as of September 30, 1998 of approximately $2.8 billion.
Parametric's address is 7310 Columbia Center, 701 Fifth Avenue, Seattle,
Washington 98104-7090. Parametric is registered as an investment adviser with
the SEC and as a commodity trading advisor with the CFTC.


                                               November 1, 1998 Prospectus   49
<PAGE>
 
  David Stein, Tom Seto, and Cliff Quisenberry are primarily responsible for
the day-to-day management of the Parametric Funds. Mr. Stein is a Managing
Director of Parametric and has been associated with Parametric since June,
1996. He also directs research and product development for Parametric. Mr.
Stein graduated with bachelor's and master's degrees in Applied Mathematics
from the University of Witwatersrand, South Africa, and received a Ph.D. in
Applied Mathematics from Harvard University. Prior to joining Parametric, Mr.
Stein served as the Director of Investment Research at GTE Investment
Management, Director of Active Equity Strategies at the Vanguard Group, and
Director of Quantitative Portfolio Management and Research at IBM. Mr. Seto is
a Vice President of Parametric and has 7 years of experience in managing
structured equity portfolios. Prior to joining Parametric, he served as the
Head of U.S. Equity Index Investments at Barclays Global Investors. Mr. Seto
graduated from the University of Washington with a bachelor's degree in
Electrical Engineering, and from the University of Chicago with an MBA in
Finance. Mr. Quisenberry is a Vice President of Parametric and has been with
Parametric since 1994. He previously served as a Vice President and Portfolio
Manager at Cutler & Co., and as a Security Analyst and Portfolio Manager at
Fred Alger Management. Mr. Quisenberry graduated from Yale University with a
bachelor's degree in Economics. He is a Chartered Financial Analyst.
 
  Registration as an investment adviser with the SEC does not involve
supervision by the SEC over investment advice, and registration with the CFTC
as a commodity trading adviser does not involve supervision by the CFTC over
commodities trading. The portfolio management agreements are not exclusive,
and Blairlogie, Cadence, Columbus Circle, NFJ, Parametric, and Pacific
Investment Management may provide, and currently are providing, investment
management services to other clients, including other investment companies.
 
FUND ADMINISTRATOR
 
  PIMCO Advisors also serves as administrator (the "Administrator") for the
Funds' Institutional Class and Administrative Class shares pursuant to an
administration agreement with the Trust. The Administrator provides or
procures administrative services for Institutional Class and Administrative
Class shareholders of the Funds, which include clerical help and accounting,
bookkeeping, internal audit services and certain other services required by
the Funds, and preparation of reports to the Funds' shareholders and
regulatory filings. The Administrator has retained Pacific Investment
Management to provide such services as sub-administrator. The Administrator
and/or the sub-administrator may also retain other affiliates to provide
certain of these services. In addition, the Administrator, at its own expense,
arranges for the provision of legal, audit, custody, transfer agency
(including sub-transfer agency and other administrative services) and other
services necessary for the ordinary operation of the Funds, and is responsible
for the costs of registration of the Trust's shares and the printing of
prospectuses and shareholder reports for current shareholders.
 
  The Funds (and not the Administrator) are responsible for the following
expenses: (i) salaries and other compensation of any of the Trust's executive
officers and employees who are not officers, directors, stockholders, or
employees of PIMCO Advisors, Pacific Investment Management, or their
subsidiaries or affiliates; (ii) taxes and governmental fees; (iii) brokerage
fees and commissions and other portfolio transaction expenses; (iv) the costs
of borrowing money, including interest expenses; (v) fees and expenses of the
Trustees who are not "interested persons" of the Adviser, any Portfolio
Manager, or the Trust, and any counsel retained exclusively for their benefit;
(vi) extraordinary expenses, including costs of litigation and indemnification
expenses; (vii) expenses which are capitalized in accordance with generally
accepted accounting principles; and (viii) any expenses allocated or allocable
to a specific class of shares, which include service and/or distribution fees
payable with respect to the Administrative Class shares, and may include
certain other expenses as permitted by the Trust's Multiple Class Plan adopted
pursuant to Rule 18f-3 under the Investment Company Act of 1940 (the "1940
Act"), subject to review and approval by the Trustees.
 

50    PIMCO Funds: Multi-Manager Series

<PAGE>
 
ADVISORY AND ADMINISTRATIVE FEES
 
  The Funds feature fixed advisory and administrative fees. For providing or
arranging for the provision of investment advisory services to the Funds as
described above, PIMCO Advisors receives monthly fees from each Fund at an
annual rate based on the average daily net assets of the Fund as follows:
 
<TABLE>
<CAPTION>
                                                                      ADVISORY
   FUND                                                               FEE RATE
   ----                                                               --------
   <S>                                                                <C>
   Capital Appreciation, Mid-Cap Growth, Equity Income, Value,
    Enhanced Equity, Structured Emerging Markets, Tax-Efficient
    Structured Emerging Markets, Tax-Efficient Equity, 
    and Balanced Funds...............................................    .45%
   Value 25 Fund.....................................................    .50%
   International Fund................................................    .55%
   Core Equity Fund..................................................    .57%
   International Developed, Renaissance, and Small-Cap Value Funds...    .60%
   Mid-Cap Equity Fund...............................................    .63%
   Innovation Fund...................................................    .65%
   Emerging Markets and International Growth Funds...................    .85%
   Small-Cap Growth Fund.............................................   1.00%
   Micro-Cap Growth Fund.............................................   1.25%
</TABLE>
 
  For providing or procuring administrative services for the Funds as
described above, the Administrator receives monthly fees from each Fund at an
annual rate based on the average daily net assets attributable in the
aggregate to the Fund's Institutional Class and Administrative Class shares as
follows:
 
<TABLE>
<CAPTION>
                                                                 ADMINISTRATIVE
   FUND                                                             FEE RATE
   ----                                                          --------------
   <S>                                                           <C>
   Emerging Markets, International Developed, International,
    International Growth, Structured Emerging Markets, and 
    Tax-Efficient Structured Emerging Markets Funds.............      .50%
   All Other Funds..............................................      .25%
</TABLE>
 
  The investment advisory, administration, and sub-administration agreements
for the Funds may be terminated by the Trustees, PIMCO Advisors or Pacific
Investment Management (as the case may be) on 60 days' written notice. In
addition, these agreements may be terminated with regard to the International,
Renaissance, and Innovation Funds by a majority of the Trustees that are not
interested persons of the Trust, PIMCO Advisors, or Pacific Investment
Management (as the case may be), on 60 days' written notice. Following their
initial terms, the agreements will continue from year to year if approved by
the Trustees.
 
  Pursuant to the portfolio management agreements between the Adviser and each
of the Portfolio Managers, PIMCO Advisors (and not the Funds or the Trust)
pays each Portfolio Manager a fee based on a percentage of the average daily
net assets of a Fund as follows: Blairlogie--.40% for the International Fund,
 .50% for the International Developed Fund, and .75% for the Emerging Markets
Fund; Cadence--.35% for the Capital Appreciation Fund, .35% for the Mid-Cap
Growth Fund, .35% for the portion of the Common Stock Segment of the Balanced
Fund allocated to Cadence, .90% for the Small-Cap Growth Fund, and 1.15% for
the Micro-Cap Growth Fund; Columbus Circle--.38% for the Renaissance Fund,
 .38% for the Innovation Fund, .47% for the Core Equity Fund, .53% for the Mid-
Cap Equity Fund, and .75% for the International Growth Fund; NFJ--.35% for the
Equity Income Fund, .35% for the Value Fund, .35% for the portion of the
Common Stock Segment of the Balanced Fund allocated to NFJ, .40% for the Value
25 Fund, and .50% for the Small-Cap Value Fund; Pacific Investment
Management--.25% for the Fixed Income Securities Segment of the Balanced Fund;
and Parametric--.35% for the Enhanced Equity Fund, .35% for the Structured
Emerging Markets Fund, .35% for the Tax-Efficient Structured Emerging Markets
Fund, and .35% for the Tax-Efficient Equity Fund.


                                               November 1, 1998 Prospectus   51
<PAGE>
 
SERVICE AND DISTRIBUTION FEES
 
  The Trust has adopted an Administrative Services Plan and a Distribution
Plan (the "Plans") with respect to the Administrative Class shares of each
Fund except for the Emerging Markets, Capital Appreciation, and Small-Cap
Growth Funds, for which the Trust has adopted only an Administrative Services
Plan. Under the terms of the Plans, the Trust is permitted to reimburse, out
of the Administrative Class assets of each Fund, in an amount up to .25% on an
annual basis of the average daily net assets of that class, financial
intermediaries that provide services in connection with the distribution and
marketing of shares and/or the provision of certain shareholder services (in
the case of the Distribution Plan) or the administration of plans or programs
that use Fund shares as their funding medium (in the case of the
Administrative Services Plan), and to reimburse certain other related
expenses. Total reimbursements under the Plans may be paid in an amount up to
 .25% on an annual basis of the average daily net assets attributable to the
Administrative Class shares of each Fund. The same entity may not receive both
distribution and administrative services fees with respect to the same assets
but may with respect to separate assets receive fees under each Plan. Fees
paid pursuant to either Plan may be paid for shareholder services and the
maintenance of accounts, and therefore may constitute "service fees" for
purposes of applicable rules of the National Association of Securities
Dealers, Inc. Each Plan has been adopted in accordance with the requirements
of Rule 12b-1 under the 1940 Act and will be administered in accordance with
the provisions of that rule, except that shareholders will not have the voting
rights set forth in Rule 12b-1 with respect to the Administrative Services
Plan that they will have with respect to the Distribution Plan. For more
complete disclosure regarding the Plans and their terms, see the Statement of
Additional Information.
 
  Institutional and Administrative Class shares of the Trust may also be
offered through certain brokers and financial intermediaries ("service
agents") that have established a shareholder servicing relationship with the
Trust on behalf of their customers. The Trust pays no compensation to such
entities other than service fees paid with respect to Administrative Class
shares. Service agents may impose additional or different conditions on the
purchase or redemption of Fund shares by their customers and may charge their
customers transaction or other account fees on the purchase and redemption of
Fund shares. Each service agent is responsible for transmitting to its
customers a schedule of any such fees and information regarding any additional
or different conditions regarding purchases and redemptions. Shareholders who
are customers of service agents should consult their service agents for
information regarding these fees and conditions.
 
DISTRIBUTOR
 
  Shares of the Trust are distributed through PIMCO Funds Distributors LLC
(the "Distributor"), a wholly owned subsidiary of PIMCO Advisors. The
Distributor, located at 2187 Atlantic Street, Stamford, Connecticut 06902, is
a broker-dealer registered with the SEC.
 
                              PURCHASE OF SHARES
 
  With certain exceptions, each Fund may offer its shares in up to six
classes: Institutional Class, Administrative Class, Class A, Class B, Class C,
and Class D. This Prospectus relates only to the Institutional Class shares
and Administrative Class shares of the Funds. For information regarding Class
A, Class B, Class C, and Class D shares, see "Other Information--Multiple
Classes of Shares" below.
 
  Shares of the Institutional Class are offered primarily for direct
investment by investors such as pension and profit sharing plans, employee
benefit trusts, endowments, foundations, corporations, and high net worth
individuals (Institutional Class shares may also be offered through certain
financial intermediaries that charge their customers
 

52    PIMCO Funds: Multi-Manager Series

<PAGE>
 
transaction or other fees with respect to their customers' investments in the
Funds). Shares of the Administrative Class are offered primarily through
employee benefit plan alliances, broker-dealers, and other intermediaries, and
each Fund pays service and/or distribution fees to such entities for services
they provide to shareholders of that class.
 
  Except as described below under "Fund Reimbursement Fees," shares of either
the Institutional Class or the Administrative Class of the Funds may be
purchased at the relevant net asset value of that class without a sales charge
or other fee. The minimum initial investment for shares of either class is $5
million, except that the minimum initial investment for a registered
investment adviser purchasing Institutional Class shares for its clients
through omnibus accounts is $250,000 per Fund. Shares may also be offered to
clients of Blairlogie, Cadence, Columbus Circle, NFJ, Pacific Investment
Management, Parametric, and their affiliates, and to the benefit plans of
PIMCO Advisors and its affiliates. In addition, the minimum initial investment
does not apply to shares of the Institutional Class offered through fee-based
programs sponsored and maintained by a registered broker-dealer and approved
by the Distributor pursuant to which each investor pays an asset based fee at
an annual rate of at least .50% of the assets in the account to a financial
intermediary for investment advisory and/or administrative services.
 
  Pension and profit-sharing plans, employee benefit trusts and employee
benefit plan alliances and "wrap account" programs established with broker-
dealers or financial intermediaries may purchase shares of either class only
if the plan or program for which the shares are being acquired will maintain
an omnibus or pooled account for each Fund and will not require a Fund to pay
any type of administrative payment per participant account to any third party.
 
  The investment minimums discussed in this section and the limitations set
forth in "Investment Limitations" below do not apply to participants in PIMCO
Advisors Portfolio Strategies, a managed product sponsored by PIMCO Advisors.
 
INITIAL INVESTMENT
 
  An account may be opened by completing and signing a Client Registration
Application and mailing it to PIMCO Funds at the following address: 840
Newport Center Drive, Suite 300, Newport Beach, California 92660. A Client
Registration Application may be obtained by calling 1-800-800-0952.
 
  Except as provided below, purchases of Institutional Class and
Administrative Class shares can only be made by wiring federal funds to
Investors Fiduciary Trust Company (the "Transfer Agent"), 801 Pennsylvania,
Kansas City, Missouri 64105. Before wiring federal funds, the investor must
first telephone the Trust at 1-800-927-4648 to receive instructions for wire
transfer, and the following information will be requested: name of authorized
person; shareholder name; shareholder account number; name of Fund and share
class; amount being wired; and wiring bank name.
 
  Shares may be purchased without first wiring federal funds if the proceeds
of the investment are derived from an advisory account maintained by the
investor with PIMCO Advisors or one of its affiliates; from surrender or other
payment from an annuity, insurance, or other contract held by Pacific Life
Insurance Company; or from an investment by broker-dealers, institutional
clients or other financial intermediaries which have established a shareholder
servicing relationship with the Trust on behalf of their customers.
 
  A purchase order, together with payment in proper form, received by the
Transfer Agent prior to the close of regular trading (normally 4:00 p.m.,
Eastern time) on the New York Stock Exchange (the "Exchange"), on a day the
Trust is open for business, will be effected at that day's net asset value. An
order received after the close of regular trading on the Exchange will be
effected at the net asset value determined on the next business day. However,
orders received by certain retirement plans and other financial intermediaries
on a business day prior to the close of regular trading on the Exchange


November 1, 1998 Prospectus   53
<PAGE>
 
and communicated to the Transfer Agent prior to 9:00 a.m., Eastern time, on
the following business day will be effected at the net asset value determined
on the prior business day. The Trust is "open for business" on each day the
Exchange is open for trading, which excludes the following holidays: New
Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good Friday,
Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day.
Purchase orders will be accepted only on days on which the Trust is open for
business.
 
ADDITIONAL INVESTMENTS
 
  Additional investments may be made at any time at the relevant net asset
value for the particular class by calling the Trust and wiring federal funds
to the Transfer Agent as outlined above.
 
FUND REIMBURSEMENT FEES
 
  Investors in Institutional Class and Administrative Class shares of the
Structured Emerging Markets and Tax-Efficient Structured Emerging Markets
Funds are subject to a fee ("Fund Reimbursement Fee"), both at the time of
purchase and at the time of redemption, equal to 1.00% of the net asset value
of the shares purchased or redeemed. Fund Reimbursement Fees are deducted
automatically from the amount invested or the amount to be received in
connection with a redemption; the fees are not paid separately. Fund
Reimbursement Fees are paid to and retained by the Funds to defray certain
costs described below and no portion of such fees are paid to or retained by
the Adviser, the Distributor, or the Portfolio Manager. Fund Reimbursement
Fees are not sales loads or contingent deferred sales charges. Reinvestment of
dividends and capital gains distributions paid to shareholders by the Funds
are not subject to Fund Reimbursement Fees, but redemptions of shares acquired
by such reinvestments are subject to Fund Reimbursement Fees.
 
  The purpose of Fund Reimbursement Fees is to defray the costs associated
with investing the proceeds of the sale of shares to investors (in the case of
purchases) or the costs associated with the sale of portfolio securities to
satisfy redemption requests (in the case of redemptions), thus insulating
existing shareholders from such costs. The amount of a Fund Reimbursement Fee
represents the Portfolio Manager's estimate of the costs reasonably
anticipated to be incurred by the Funds in connection with the purchase or
sale of portfolio securities, including international stocks, associated with
an investor's purchase or redemption proceeds. These costs include brokerage
costs, market impact costs (i.e., the increase in market prices which may
result when a Fund purchases or sells thinly traded stocks), and the effect of
"bid/asked" spreads in international markets. Transaction costs incurred when
purchasing or selling stocks of companies in foreign countries, and
particularly emerging market countries, may be significantly higher than those
in more developed countries. This is due, in part, to less competition among
brokers, underutilization of technology on the part of foreign exchanges and
brokers, the lack of less expensive investment options (such as derivative
instruments), and lower levels of liquidity in foreign and underdeveloped
markets.
 
  On July 1, 1998, the Structured Emerging Markets and Tax-Efficient
Structured Emerging Markets Funds commenced investment operations immediately
following a transaction (the "Transaction") in which each Fund issued
Institutional Class shares to unit holders of the Parametric Portfolio
Associates Emerging Markets Trust, a separate account managed by Parametric
(the "EM Trust"), in exchange for the EM Trust's assets. The EM Trust's unit
holders were divided into two categories: participants who pay taxes ("Taxable
Participants") and participants that are non-taxable entities ("Non-Taxable
Participants"; together with the Taxable Participants, the "Participants").
Assets in the EM Trust equal in value to the value of the Taxable
Participants' participation in the EM Trust were transferred to the Tax-
Efficient Structured Emerging Markets Fund in exchange for Institutional Class
shares of that Fund. Assets in the EM Trust equal in value to the value of the
Non-Taxable Participants' participation in the EM Trust were transferred to
the Structured Emerging Markets Fund in exchange for Institutional Class
shares of that Fund. The Participants' interests in the EM Trust were
 

54    PIMCO Funds: Multi-Manager Series
<PAGE>
 
then terminated and Institutional Class shares of the Tax-Efficient Structured
Emerging Markets Fund were distributed to the Taxable Participants and
Institutional Class shares of the Structured Emerging Markets Fund were
distributed to the Non-Taxable Participants, in each case in proportion to
each Participant's interest in the EM Trust. After the completion of the
Transaction, the portfolio securities which were owned by the EM Trust became
portfolio securities of the Funds (allocated to the Funds on a substantially
pro-rata basis), to be held or sold as Parametric deems appropriate.
 
  Portfolio securities transferred to the Funds pursuant to the Transaction
will have the same tax basis as they had when held by the EM Trust. Such
securities have "built-in" capital gains if their market value at the time of
the Transaction was greater than their tax basis (other securities may have
"built-in" capital losses for tax purposes if their market value at the time
of the Transaction was less than their tax basis). Built-in capital gains
realized upon the disposition of these securities will be distributed to all
Fund shareholders who are shareholders of record on the record date for the
distribution, even if such shareholders were not Participants in the EM Trust
prior to the Transaction. This means that investors purchasing Fund shares
after the date of this Prospectus may be required to pay taxes on
distributions that economically represent a return of a portion of the amount
invested. For further information, see "Dividends, Distributions and Taxes"
below and "Taxation--Distributions" in the Statement of Additional
Information.
 
  In connection with the Transaction, the Participants in the EM Trust will
not be subject to Fund Reimbursement Fees with respect to any shares of these
Funds they acquired through June 30, 1998, and will not be subject to Fund
Reimbursement Fees upon the subsequent redemption (including any redemption in
connection with an exchange) of any shares acquired by any such Participant
through June 30, 1998. Such Participants will be subject to such Fund
Reimbursement Fees to the same extent as any other shareholder on any shares
of either Fund acquired (whether by reinvestment of dividends or capital gain
distributions or otherwise) after June 30, 1998.
 
OTHER PURCHASE INFORMATION
 
  Purchases of a Fund's Institutional Class and Administrative Class shares
will be made in full and fractional shares. In the interest of economy and
convenience, certificates for shares will not be issued.
 
  The Trust and the Distributor each reserves the right, in its sole
discretion, to suspend the offering of shares of the Funds or to reject any
purchase order, in whole or in part, when, in the judgment of management, such
suspension or rejection is in the best interests of the Trust. The Trust and
the Distributor may also waive the minimum initial investment for certain
investors.
 
  Purchases and sales should be made for long-term investment purposes only.
The Trust and Adviser each reserves the right to restrict purchases of Fund
shares (including exchanges) when a pattern of frequent purchases and sales
made in response to short-term fluctuations in share price appears evident.
 
  Institutional Class and Administrative Class shares of the Trust are not
qualified or registered for sale in all states. Prospective investors should
inquire as to whether shares of a particular Fund are available for offer and
sale in their state of residence. Shares of the Trust may not be offered or
sold in any state unless registered or qualified in that jurisdiction or
unless an exemption from registration or qualification is available.
 
  Investors may, subject to the approval of the Trust, purchase shares of a
Fund with liquid securities that are eligible for purchase by the Fund
(consistent with such Fund's investment policies and restrictions) and that
have a value that is readily ascertainable in accordance with the Trust's
valuation policies. These transactions will be effected only if the Portfolio
Manager intends to retain the security in the Fund as an investment. Assets so
purchased by a Fund will be


                                               November 1, 1998 Prospectus   55
<PAGE>
 
valued in generally the same manner as they would be valued for purposes of
pricing the Fund's shares, if such assets were included in the Fund's assets
at the time of purchase. The Trust reserves the right to amend or terminate
this practice at any time.
 
INVESTMENT LIMITATIONS
 
  Shares of the Micro-Cap Growth and Small-Cap Growth Funds are normally not
available for purchase by new investors, although purchase orders may be
accepted in certain circumstances. Existing shareholders may continue to
invest in these Funds. In addition, Institutional Class and Administrative
Class shares of the Innovation Fund are not offered as of the date of this
Prospectus; however, investment opportunities in this Fund may be available in
the future. These restrictions may be changed or eliminated at any time at the
discretion of the Trust's Board of Trustees. Also, it is anticipated that the
Emerging Markets and International Developed Funds will reorganize as series
of another mutual fund family on or before March 31, 1999 and thereafter would
not be available for purchase from the Trust. See "Management of the Trust--
Portfolio Managers--Blairlogie."
 
RETIREMENT PLANS
 
  Shares of the Funds are available for purchase by retirement and savings
plans, including Keogh plans, 401(k) plans, 403(b) custodial accounts, and
Individual Retirement Accounts. The administrator of a plan or employee
benefits office can provide participants or employees with detailed
information on how to participate in the plan and how to elect a Fund as an
investment option. Participants in a retirement or savings plan may be
permitted to elect different investment options, alter the amounts contributed
to the plan, or change how contributions are allocated among investment
options in accordance with the plan's specific provisions. The plan
administrator or employee benefits office should be consulted for details. For
questions about participant accounts, participants should contact their
employee benefits office, the plan administrator, or the organization that
provides recordkeeping services for the plan. Investors who purchase shares
through retirement plans should be aware that plan administrators may
aggregate purchase and redemption orders for participants in the plan.
Therefore, there may be a delay between the time the investor places an order
with the plan administrator and the time the order is forwarded to the
Transfer Agent for execution.
 
                             REDEMPTION OF SHARES
 
REDEMPTIONS BY MAIL
 
  Institutional Class and Administrative Class shares may be redeemed by
submitting a written request to PIMCO Funds, 840 Newport Center Drive, Suite
300, Newport Beach, California 92660, stating the Fund from which the shares
are to be redeemed, the class of shares, the number or dollar amount of the
shares to be redeemed and the account number. The request must be signed
exactly as the names of the registered owners appear on the Trust's account
records, and the request must be signed by the minimum number of persons
designated on the Client Registration Application that are required to effect
a redemption.
 
REDEMPTIONS BY TELEPHONE OR OTHER WIRE COMMUNICATION
 
  If an election is made on the Client Registration Application (or
subsequently in writing), redemptions of shares may be requested by calling
the Trust at 1-800-927-4648, by sending a facsimile to 1-949-760-4456, or by
other means of wire communication. Investors should state the Fund and class
from which the shares are to be redeemed, the number
 

56    PIMCO Funds: Multi-Manager Series

<PAGE>
 
or dollar amount of the shares to be redeemed and the account number.
Redemption requests of an amount of $10 million or more may be initiated by
telephone, but must be confirmed in writing by an authorized party prior to
processing.
 
  In electing a telephone redemption, the investor authorizes Pacific
Investment Management and the Transfer Agent to act on telephone instructions
from any person representing himself to be the investor, and reasonably
believed by Pacific Investment Management and the Transfer Agent to be
genuine. Neither the Trust nor its Transfer Agent may be liable for any loss,
cost or expense for acting on instructions (whether in writing or by
telephone) believed by the party receiving such instructions to be genuine and
in accordance with the procedures described in this Prospectus. Shareholders
should realize that by electing the telephone or wire redemption option, they
may be giving up a measure of security that they might have if they were to
redeem their shares in writing. Furthermore, interruptions in telephone
service may mean that a shareholder will be unable to effect a redemption by
telephone when desired. The Transfer Agent also provides written confirmation
of transactions initiated by telephone as a procedure designed to confirm that
telephone instructions are genuine (written confirmation is also provided for
redemption requests received in writing). All telephone transactions are
recorded, and Pacific Investment Management or the Transfer Agent may request
certain information in order to verify that the person giving instructions is
authorized to do so. If the Trust or Transfer Agent fails to employ reasonable
procedures to confirm that instructions communicated by telephone are genuine,
it may be liable for any losses due to unauthorized or fraudulent telephone
transactions. All redemptions, whether initiated by letter or telephone, will
be processed in a timely manner, and proceeds will be forwarded by wire in
accordance with the redemption policies of the Trust detailed below. See
"Redemption of Shares--Other Redemption Information."
 
  Shareholders may decline telephone exchange or redemption privileges after
an account is opened by instructing the Transfer Agent in writing at least
seven business days prior to the date the instruction is to be effective.
Shareholders may experience delays in exercising telephone redemption
privileges during periods of abnormal market activity. During periods of
volatile economic or market conditions, shareholders may wish to consider
transmitting redemption orders by telegram, facsimile or overnight courier.
 
  Defined contribution plan participants may request redemptions by contacting
the employee benefits office, the plan administrator or the organization that
provides recordkeeping services for the plan.
 
OTHER REDEMPTION INFORMATION
 
  Redemption requests for Fund shares are effected at the net asset value per
share next determined after receipt in good order of the redemption request by
the Trust or its designee. A redemption request received by the Trust or its
designee prior to the close of regular trading on the Exchange (normally 4:00
p.m., Eastern time), on a day the Trust is open for business, is effective on
that day. A redemption request received after that time becomes effective on
the next business day.
 
  Unless eligible for a waiver, shareholders of the Structured Emerging
Markets and Tax-Efficient Structured Emerging Markets Funds who redeem their
shares will pay a Fund Reimbursement Fee equal to 1.00% of the net asset value
of the shares redeemed. See "Purchase of Shares--Fund Reimbursement Fees."
 
  Payment of the redemption price will ordinarily be wired to the investor's
bank within three business days after the redemption request, but may take up
to seven business days. Redemption proceeds will be sent by wire only to the
bank name designated on the Client Registration Application. The Trust may
suspend the right of redemption or postpone the payment date at times when the
Exchange is closed, or during certain other periods as permitted under the
federal securities laws.


                                               November 1, 1998 Prospectus   57
<PAGE>
 
  For shareholder protection, a request to change information contained in an
account registration (for example, a request to change the bank designated to
receive wire redemption proceeds) must be received in writing, signed by the
minimum number of persons designated on the Client Registration Application
that are required to effect a redemption, and accompanied by a signature
guarantee from any eligible guarantor institution, as determined in accordance
with the Trust's procedures. Shareholders should inquire as to whether a
particular institution is an eligible guarantor institution. A signature
guarantee cannot be provided by a notary public. In addition, corporations,
trusts, and other institutional organizations are required to furnish evidence
of the authority of the persons designated on the Client Registration
Application to effect transactions for the organization.
 
  Due to the relatively high cost of maintaining small accounts, the Trust
reserves the right to redeem Institutional Class and Administrative Class
shares in any account for their then-current value (which will be promptly
paid to the investor) if at any time, due to redemption by the investor, the
shares in the account do not have a value of at least $100,000. A shareholder
will receive advance notice of a mandatory redemption and will be given at
least 30 days to bring the value of its account up to at least $100,000. This
mandatory redemption policy does not apply to participants in PIMCO Advisors
Portfolio Strategies, a managed product sponsored by PIMCO Advisors.
 
  The Trust agrees to redeem shares of each Fund solely in cash up to the
lesser of $250,000 or 1% of the Fund's net assets during any 90-day period for
any one shareholder. In consideration of the best interests of the remaining
shareholders, the Trust reserves the right to pay any redemption proceeds
exceeding this amount in whole or in part by a distribution in kind of
securities held by a Fund in lieu of cash. Except for Funds with a tax-
efficient management strategy, it is highly unlikely that shares would ever be
redeemed in kind. When shares are redeemed in kind, the redeeming shareholder
should expect to incur transaction costs upon the disposition of the
securities received in the distribution.
 
EXCHANGE PRIVILEGE
 
  Shares of a Fund may be exchanged for shares of the same class of any other
Fund or other series of the Trust based on the respective net asset values of
the shares involved. An exchange may be made by following the redemption
procedure described above under "Redemptions by Mail" or, if the telephone
redemption option has been elected, by calling the Trust at 1-800-927-4648.
Shares of a Fund may also be exchanged for shares of the same class of a
series of PIMCO Funds: Pacific Investment Management Series, an affiliated
mutual fund family composed primarily of fixed income portfolios managed by
Pacific Investment Management. Shareholders interested in such an exchange may
request a prospectus for these other series by contacting PIMCO Funds: Pacific
Investment Management Series at the same address and telephone number as the
Trust.
 
  Unless eligible for a waiver, shareholders who exchange their Institutional
Class or Administrative Class shares of any PIMCO Fund for the same class of
shares of the Structured Emerging Markets Fund or Tax-Efficient Structured
Emerging Markets Fund will be subject to a Fund Reimbursement Fee of 1.00% of
the net asset value of the shares of these Funds acquired in connection with
the exchange. Also, shareholders who exchange their shares of the Structured
Emerging Markets Fund or Tax-Efficient Structured Emerging Markets Fund for
shares of any other PIMCO Fund will be subject to a Fund Reimbursement Fee of
1.00% of the net asset value of the shares of these Funds redeemed in
connection with the exchange. See "Purchase of Shares--Fund Reimbursement
Fees."
 
  Exchanges may be made only with respect to Funds or other eligible series
that are registered in the state of residence of the investor or where an
exemption from registration is available. An exchange order is treated the
same for tax purposes as a redemption followed by a purchase and may result in
a capital gain or loss, and special rules may apply in computing tax basis
when determining gain or loss. See "Taxation" in the Statement of Additional
Information.
 

58   PIMCO Funds: Multi-Manager Series
<PAGE>
 
  It is anticipated that the Emerging Markets and International Developed
Funds will reorganize as series of another mutual fund family on or before
March 31, 1999 and thereafter would not be eligible for exchanges involving
other PIMCO Funds. See "Management of the Trust--Portfolio Managers--
Blairlogie."
 
  The Trust reserves the right to refuse exchange purchases if, in the
judgment of the Adviser, the purchase would adversely affect a Fund and its
shareholders. In particular, a pattern of exchanges characteristic of "market-
timing" strategies may be deemed by the Adviser to be detrimental to the Trust
or a particular Fund. Currently, the Trust limits the number of "round trip"
exchanges an investor may make. An investor makes a "round trip" exchange when
the investor purchases shares of a particular Fund, subsequently exchanges
those shares for shares of a different Fund, and then exchanges back into the
originally purchased Fund. The Trust has the right to refuse any exchange for
any investor who completes (by making the exchange back into the shares of the
originally purchased Fund) more than six round trip exchanges in any twelve-
month period. Although the Trust will attempt to give shareholders prior
notice whenever it is reasonably able to do so, it may impose additional
restrictions on exchanges at any time.
 
                            PORTFOLIO TRANSACTIONS
 
  Pursuant to the portfolio management agreements, a Portfolio Manager places
orders for the purchase and sale of portfolio investments for a Fund's
accounts with brokers or dealers selected by it in its discretion. In
effecting purchases and sales of portfolio securities for the accounts of the
Funds, the Portfolio Managers will seek the best price and execution of the
Funds' orders. In doing so, a Fund may pay higher commission rates than the
lowest available when the Portfolio Manager believes it is reasonable to do so
in light of the value of the brokerage and research services provided by the
broker effecting the transaction. The Portfolio Managers also may consider
sales of shares of the Trust as a factor in the selection of broker-dealers to
execute portfolio transactions for the Trust.
 
  A change in the securities held by a Fund is known as "portfolio turnover."
With the exception of the Tax-Efficient Structured Emerging Markets and Tax-
Efficient Equity Funds (which may attempt to minimize portfolio turnover as a
tax-efficient management strategy), the Portfolio Managers manage the Funds
without regard generally to restrictions on portfolio turnover, except those
imposed on their ability to engage in short-term trading by provisions of the
federal tax laws. The use of futures contracts and other derivative
instruments with relatively short maturities may tend to exaggerate the
portfolio turnover rate for some of the Funds. The use of futures contracts
may involve the payment of commissions to futures commission merchants. High
portfolio turnover (e.g., over 100%) involves correspondingly greater expenses
to a Fund, including brokerage commissions or dealer mark-ups and other
transaction costs on the sale of securities and reinvestments in other
securities. Such sales may result in realization of taxable capital gains
(including short-term capital gains which are generally taxed at ordinary
income tax rates). See "Dividends, Distributions and Taxes." Portfolio
turnover rates for each Fund for which financial highlights for at least the
past two fiscal years are provided in this Prospectus are set forth under
"Financial Highlights." Portfolio turnover rates for the remaining Funds which
have not recently commenced operations were as follows for the fiscal years
ended June 30, 1998 and 1997, respectively: International--60% and 59%;
Renaissance--192% and 131%; and Innovation--100% and 80%. The annual portfolio
turnover rate for each of the Tax-Efficient Structured Emerging Markets and
Tax-Efficient Equity Funds is expected to be less than 40%. The annual
portfolio turnover rate for the Structured Emerging Markets and International
Growth Funds is expected to be less than 100% and for the Value 25 Fund is
expected to be less than 150%.
 
  Some securities considered for investment by the Funds may also be
appropriate for other clients served by the Portfolio Managers. If a purchase
or sale of securities consistent with the investment policies of a Fund and
one or more


                                               November 1, 1998 Prospectus   59
<PAGE>
 
of these clients served by a Portfolio Manager is considered at or about the
same time, transactions in such securities will be allocated among the Fund
and clients in a manner deemed fair and reasonable by the Portfolio Manager.
Particularly when investing in less liquid or illiquid securities of smaller
capitalization companies, such allocation may take into account the asset size
of a Fund in determining whether the allocation of an investment is suitable.
As a result, larger Funds may become more concentrated in more liquid
securities than smaller Funds or private accounts of a Portfolio Manager
pursuing a small capitalization investment strategy, which could adversely
affect performance. A Portfolio Manager may aggregate orders for the Funds
with simultaneous transactions entered into on behalf of its other clients so
long as price and transaction expenses are averaged either for the portfolio
transaction or for that day.
 
                                NET ASSET VALUE
 
  The net asset values of Institutional and Administrative Class shares of
each Fund will be determined once on each day on which the Exchange is open (a
"Business Day"), as of the close of regular trading (normally 4:00 p.m.,
Eastern time) on the Exchange. Net asset value will not be determined on days
on which the Exchange is closed.
 
  Portfolio securities and other assets for which market quotations are
readily available are stated at market value. Fixed income securities are
normally valued on the basis of quotations obtained from brokers and dealers
or pricing services, which take into account appropriate factors such as
institutional-sized trading in similar groups of securities, yield, quality,
coupon rate, maturity, type of issue, trading characteristics, and other
market data. Certain fixed income securities for which daily market quotations
are not readily available may be valued, pursuant to guidelines established by
the Board of Trustees, with reference to fixed income securities whose prices
are more readily obtainable and whose durations are comparable to the
securities being valued. Short-term investments having a maturity of 60 days
or less are valued at amortized cost, when the Board of Trustees determines
that amortized cost is their fair value. Exchange-traded options, futures and
options on futures are valued at the settlement price as determined by the
appropriate clearing corporation. All other securities and assets are valued
at their fair value as determined in good faith by the Trustees or by persons
acting at their direction.
 
  Quotations of foreign securities in foreign currency are converted to U.S.
dollar equivalents using foreign exchange quotations received from independent
dealers. The calculation of the net asset value of the Emerging Markets,
International Developed, International, International Growth, Structured
Emerging Markets, and Tax-Efficient Structured Emerging Markets Funds may not
take place contemporaneously with the determination of the prices of certain
portfolio securities of foreign issuers used in such calculation. Further,
under the Trust's procedures, the prices of foreign securities are determined
using information derived from pricing services and other sources. Information
that becomes known to the Trust or its agents after the time that net asset
value is calculated on any Business Day may be assessed in determining net
asset value per share after the time of receipt of the information, but will
not be used to retroactively adjust the price of the security so determined
earlier or on a prior day. Events affecting the values of portfolio securities
that occur between the time their prices are determined and the close of
regular trading on the Exchange (normally 4:00 p.m., Eastern time) may not be
reflected in the calculation of net asset value. If events materially
affecting the value of such securities occur during such period, then these
securities may be valued at fair value as determined by the Adviser or a
Portfolio Manager and approved in good faith by the Board of Trustees.
 
  Each Fund's liabilities are allocated among its classes. The total of such
liabilities allocated to a class plus that class's distribution and/or
servicing fees and any other expenses specially allocated to that class are
then deducted from the class's proportionate interest in the Fund's assets,
and the resulting amount for each class is divided by the number of
 

60   PIMCO Funds: Multi-Manager Series
<PAGE>
 
shares of that class outstanding to produce the class's "net asset value" per
share. Under certain circumstances, the per share net asset value of the
Administrative Class shares of the Funds may be lower than the per share net
asset value of the Institutional Class shares as a result of the daily expense
accruals of the service and/or distribution fees applicable to the
Administrative Class shares. Generally, for Funds that pay income dividends,
those dividends are expected to differ over time by approximately the amount
of the expense accrual differential between a particular Fund's classes.
 
                      DIVIDENDS, DISTRIBUTIONS AND TAXES
 
  Shares begin earning dividends on the effective date of purchase, provided
notification deadlines are met. See "Purchase of Shares." Net investment
income from interest and dividends, if any, will be declared and paid
quarterly to shareholders of record by the Renaissance, Equity Income, Value,
and Balanced Funds. Net investment income from interest and dividends, if any,
will be declared and paid at least annually to shareholders of record by the
other Funds. Any net capital gains from the sale of portfolio securities will
be distributed no less frequently than once annually. Net short-term capital
gains may be paid more frequently. Dividend and capital gain distributions of
a Fund will be reinvested in additional shares of that Fund unless the
shareholder elects to have them paid in cash. Dividends from net investment
income with respect to Administrative Class shares will be lower than those
paid with respect to Institutional Class shares, reflecting the payment of
service and/or distribution fees by that class.
 
  Each Fund intends to qualify as a regulated investment company annually and
to elect to be treated as a regulated investment company under the Internal
Revenue Code of 1986, as amended (the "Code"). As such, a Fund generally will
not pay federal income tax on the income and gains it pays as dividends to its
shareholders. In order to avoid a 4% federal excise tax, each Fund intends to
distribute each year substantially all of its net income and gains.
 
  Shareholders subject to U.S. federal income tax will be subject to tax on
dividends received from a Fund, regardless of whether received in cash or
reinvested in additional shares. Distributions received by tax-exempt
shareholders generally will not be subject to federal income tax to the extent
permitted under applicable tax law. All shareholders must treat dividends,
other than capital gain dividends, exempt-interest dividends, and dividends
that represent a return of capital to shareholders, as ordinary income. In
particular, distributions derived from short-term gains will be treated as
ordinary income. Dividends derived from interest on certain U.S. Government
securities may be exempt from state and local taxes, although interest on
mortgage-backed U.S. Government securities is generally not so exempt. While
the Tax-Efficient Structured Emerging Markets and Tax-Efficient Equity Funds
seek to minimize taxable distributions, the Funds may be expected to earn and
distribute taxable income and may also be expected to realize and distribute
capital gains from time to time.
 
  Dividends designated by a Fund as capital gain dividends derived from the
Fund's net capital gains (that is, the excess of its net long-term capital
gains over its net short-term capital losses) are taxable to shareholders as
long-term capital gain (generally subject to a 20% tax rate) except as
provided by an applicable tax exemption. Any distributions that are not from a
Fund's net investment income or net capital gain may be characterized as a
return of capital to shareholders or, in some cases, as capital gain. Certain
dividends declared in October, November or December of a calendar year are
taxable to shareholders (who otherwise are subject to tax on dividends) as
though received on December 31 of that year if paid to shareholders during
January of the following calendar year. Each Fund will advise shareholders
annually of the amount and nature of the dividends paid to them.
 
  Current federal tax law requires the holder of a U.S. Treasury or other
fixed income zero coupon security to accrue as income each year a portion of
the discount at which the security was purchased, even though the holder
receives no


                                               November 1, 1998 Prospectus   61
<PAGE>
 
interest payment in cash on the security during the year. In addition, pay-in-
kind securities will give rise to income which is required to be distributed
and is taxable even though the Fund holding the security receives no interest
payment in cash on the security during the year. Also, a portion of the yield
on certain high yield securities (including certain pay-in-kind securities)
issued after July 10, 1989 may be treated as dividends. Accordingly, each Fund
that holds the foregoing kinds of securities may be required to pay out as an
income distribution each year an amount which is greater than the total amount
of cash interest the Fund actually received. Such distributions may be made
from the cash assets of the Fund or by liquidation of portfolio securities, if
necessary. The Fund may realize gains or losses from such liquidations. In the
event the Fund realizes net capital gains from such transactions, its
shareholders may receive a larger capital gain distribution, if any, than they
would in the absence of such transactions.
 
  Taxable shareholders should note that the timing of their investment or
redemptions could have undesirable tax consequences. Dividends and
distributions on a Fund's shares are generally subject to federal income tax
as described herein to the extent they do not exceed the Fund's realized
income and gains, even though such dividends and distributions may
economically represent a return of a particular shareholder's investment. Such
distributions are likely to occur in respect of shares purchased at a time
when the Fund's net asset value reflects gains that are either unrealized or
realized but not distributed. Such realized gains may be required to be
distributed even when a Fund's net asset value also reflects unrealized
losses.
 
  The preceding discussion relates only to federal income tax; the
consequences under other tax laws may differ. Shareholders should consult
their tax advisers as to the possible application of foreign, state and local
income tax laws to Trust dividends and capital gain distributions. For
additional information relating to the tax aspects of investing in a Fund, see
the Statement of Additional Information.
 
                               OTHER INFORMATION
 
CAPITALIZATION
 
  The Trust was organized as a Massachusetts business trust on August 24,
1990, and currently consists of twenty-eight portfolios that are operational,
twenty-one of which are described in this Prospectus. Other portfolios may be
offered by means of a separate prospectus. The Board of Trustees may establish
additional portfolios in the future. The capitalization of the Trust consists
of an unlimited number of shares of beneficial interest. When issued, shares
of the Trust are fully paid, non-assessable and freely transferable.
 
  Under Massachusetts law, shareholders could, under certain circumstances, be
held liable for the obligations of the Trust. However, the Second Amended and
Restated Agreement and Declaration of Trust (the "Declaration of Trust") of
the Trust disclaims shareholder liability for acts or obligations of the Trust
and requires that notice of such disclaimer be given in each agreement,
obligation or instrument entered into or executed by the Trust or the
Trustees. The Declaration of Trust also provides for indemnification out of a
Fund's property for all loss and expense of any shareholder of that Fund held
liable on account of being or having been a shareholder. Thus, the risk of a
shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which such disclaimer is inoperative or the Fund
of which he or she is or was a shareholder is unable to meet its obligations,
and thus should be considered remote.
 

62   PIMCO Funds: Multi-Manager Series
<PAGE>
 
MULTIPLE CLASSES OF SHARES
 
  In addition to Institutional Class shares and Administrative Class shares,
certain Funds also offer up to four additional classes of shares, Class A,
Class B, Class C and Class D, through separate prospectuses. This Prospectus
relates only to Institutional Class and Administrative Class shares of the
Funds. The other classes of the Funds have different sales charges and expense
levels, which will affect performance accordingly. To obtain more information
about the other classes of shares, please call the Distributor at 1-800-426-
0107 (for Class A, Class B, and Class C) or 1-888-87-PIMCO (for Class D).
 
  Institutional Class and Administrative Class shares of each Fund represent
interests in the assets of that Fund, and each class has identical dividend,
liquidation and other rights and the same terms and conditions, except that
expenses related to the distribution and/or shareholder servicing of
Administrative Class shares are borne solely by such class, and each class
may, at the Trustees' discretion, also pay a different share of other
expenses, not including advisory or custodial fees or other expenses related
to the management of the Trust's assets, if these expenses are actually
incurred in a different amount by that class, or if the class receives
services of a different kind or to a different degree than the other classes.
All other expenses are allocated to each class on the basis of the net asset
value of that class in relation to the net asset value of the particular Fund.
 
VOTING
 
  Each class of shares of each Fund has identical voting rights, except that
each class of shares has exclusive voting rights on any matter submitted to
shareholders that relates solely to that class, and has separate voting rights
on any matter submitted to shareholders in which the interests of one class
differ from the interests of any other class. The Administrative Class shares
have exclusive voting rights with respect to matters pertaining to any
Distribution Plan applicable to that class. These shares are entitled to vote
at meetings of shareholders. Matters submitted to shareholder vote must be
approved by each Fund separately except (i) when required by the 1940 Act,
shares shall be voted together, and (ii) when the Trustees have determined
that the matter does not affect all Funds, then only shareholders of the Fund
or Funds affected shall be entitled to vote on the matter. All classes of
shares of a Fund will vote together, except with respect to a Distribution
Plan or agreement applicable to a class of shares or when a class vote is
required as specified above or otherwise by the 1940 Act. Shares are freely
transferable, are entitled to dividends as declared by the Trustees and, in
liquidation of the Trust, are entitled to receive the net assets of their
Fund, but not of the other Funds. The Trust does not generally hold annual
meetings of shareholders and will do so only when required by law.
Shareholders may remove Trustees from office by votes cast in person or by
proxy at a meeting of shareholders or by written consent. Such a meeting will
be called at the written request of the holders of 10% of the Trust's
outstanding shares.
 
  Shares entitle their holders to one vote per share (with proportionate
voting for fractional shares). As of October 13, 1998, the following were
shareholders of record of at least 25% of the outstanding voting securities of
the indicated Funds: The Bank of New York as Trustee for Melville Corporation
(New York, New York) with respect to the Core Equity Fund; Pacific Mutual Life
Insurance Company Employee's Retirement Plan Trust (Newport Beach, California)
with respect to the Enhanced Equity Fund; Pacific Mutual Life Insurance
Company (Newport Beach, California) with respect to the Mid-Cap Equity Fund;
Pacific Asset Management LLC (Newport Beach, California) with respect to the
International Growth Fund; and PIMCO Advisors L.P. (Newport Beach,
California), the Trust's investment adviser and administrator, with respect to
the Value 25 and Tax-Efficient Equity Funds. To the extent such shareholders
are also the beneficial owners of such securities, they may be deemed to
control (as that term is defined in the 1940 Act) the relevant Fund. As used
in this Prospectus, the phrase "vote of a majority of the outstanding shares"
of a Fund (or the Trust) means the vote of the lesser of: (1) 67% of the
shares of the Fund (or the Trust) present at a meeting, if the holders of


                                               November 1, 1998 Prospectus   63
<PAGE>
 
more than 50% of the outstanding shares are present in person or by proxy; or
(2) more than 50% of the outstanding shares of the Fund (or the Trust).
 
PERFORMANCE INFORMATION
 
  From time to time the Trust may make available certain information about the
performance of the Institutional Class and Administrative Class shares of some
or all of the Funds. Information about a Fund's performance is based on that
Fund's (or its predecessor's) record to a recent date and is not intended to
indicate future performance. Performance information is computed separately
for each Fund's Institutional Class and Administrative Class shares in
accordance with the formulas described below. Because Administrative Class
shares bear the expense of service and/or distribution fees, it is expected
that, under normal circumstances, the level of performance of a Fund's
Administrative Class shares will be lower than that of the Fund's
Institutional Class shares.
 
  The total return of Institutional Class and Administrative Class shares of
all Funds may be included in advertisements or other written material. When a
Fund's total return is advertised with respect to its Institutional Class and
Administrative Class shares, it will be calculated for the past year, the past
five years, and the past ten years (or if the Fund has been offered for a
period shorter than one, five or ten years, that period will be substituted)
since the establishment of the Fund or its predecessor series of PIMCO
Advisors Funds, as more fully described in the Statement of Additional
Information. For periods prior to the initial offering date of Institutional
Class or Administrative Class shares, total return presentations for a class
will be based on the historical performance of an older class of the Fund (if
any) restated, as necessary, to reflect that there are no sales charges
associated with Institutional Class or Administrative Class shares. The older
class to be used in each case is set forth in the Statement of Additional
Information. For these purposes, the performance of the older class will also
be restated to reflect any different operating expenses (such as different
administrative fees and/or 12b-1/servicing fee charges) associated with the
newer class. In certain cases, such a restatement will result in Institutional
Class or Administrative Class performance which is higher than if the
performance of the older class were not restated to reflect the different
operating expenses of the newer class. In such cases, the Trust's
advertisements will also, to the extent appropriate, show the lower
performance figure reflecting the actual operating expenses incurred by the
older class for periods prior to the initial offering date of the newer class.
Total return for each class is measured by comparing the value of an
investment in the Fund at the beginning of the relevant period to the
redemption value of the investment in the Fund at the end of the period
(assuming immediate reinvestment of any dividends or capital gains
distributions at net asset value). Total return may be advertised using
alternative methods that reflect all elements of return, but that may be
adjusted to reflect the cumulative impact of alternative fee and expense
structures.
 
  Quotations of yield for a Fund or class will be based on the investment
income per share (as defined by the SEC) during a particular 30-day (or one-
month) period (including dividends and interest), less expenses accrued during
the period ("net investment income"), and will be computed by dividing net
investment income by the maximum public offering price per share on the last
day of the period.
 
  The Funds may also provide current distribution information to their
shareholders in shareholder reports or other shareholder communications, or in
certain types of sales literature provided to prospective investors. Current
distribution information for a particular class of a Fund will be based on
distributions for a specified period (i.e., total dividends from net
investment income), divided by the relevant class net asset value per share on
the last day of the period and annualized. The rate of current distributions
does not reflect deductions for unrealized losses from transactions in
 

64   PIMCO Funds: Multi-Manager Series
<PAGE>
 
derivative instruments such as options and futures, which may reduce total
return. Current distribution rates differ from standardized yield rates in
that they represent what a class of a Fund has declared and paid to
shareholders as of the end of a specified period rather than the Fund's actual
net investment income for that period.
 
  The Adviser and each Portfolio Manager may also report to shareholders or to
the public in advertisements concerning its performance as adviser to clients
other than the Funds, and on its comparative performance or standing in
relation to other money managers. Such comparative information may be compiled
or provided by independent ratings services or by news organizations. Any
performance information, whether related to the Funds, the Adviser or the
Portfolio Managers, should be considered in light of the Fund's investment
objectives and policies, characteristics and quality of the Funds, and the
market conditions during the time period indicated, and should not be
considered to be representative of what may be achieved in the future.
 
  Investment results of the Funds will fluctuate over time, and any
representation of the Funds' total return or yield for any prior period should
not be considered as a representation of what an investor's total return or
yield may be in any future period. The Trust's Annual and Semi-Annual Reports
contain additional performance information for the Funds and are available
upon request, without charge, by calling 1-800-927-4648 (Current
Shareholders), or 1-800-800-0952 (New Accounts).


                                               November 1, 1998 Prospectus   65
<PAGE>
 
 
           --------------------------------------------------------------------
PIMCO      INVESTMENT ADVISER AND ADMINISTRATOR
FUNDS:     PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA
MULTI-     92660
MANAGER    
SERIES     --------------------------------------------------------------------
           CUSTODIAN AND TRANSFER AGENT
           Investors Fiduciary Trust Company, 801 Pennsylvania, Kansas City,
           MO 64105
           --------------------------------------------------------------------
           INDEPENDENT ACCOUNTANTS
           PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO 64105
           --------------------------------------------------------------------
           LEGAL COUNSEL
           Ropes & Gray, One International Place, Boston, MA 02110
           --------------------------------------------------------------------
<PAGE>
 
<TABLE> 
<S>                                      <C>                                     <C> 
 
FOR MORE INFORMATION                     To request a free copy of these doc-    Information about the Trust 
                                         uments or to make inquiries about       (including the SAI) can be 
The following documents are              the Funds, please write or call:        reviewed and copied at the 
available that offer further infor-                                              Securities and Exchange         
mation on the Funds of PIMCO             PIMCO Funds:                            Commission's Public Reference 
Funds: Multi-Manager Series.             Multi-Manager Series                    Room in Washington, D.C.                  
                                         840 Newport Center Drive                Information on the operation 
ANNUAL/SEMI-ANNUAL REPORTS TO            Suite 300                               of the public reference room 
SHAREHOLDERS The Trust's annual          Newport Beach, CA 92660                 may be obtained by calling the          
and semi-annual reports include a                                                obtained by calling the          
discussion of the market condi-          Telephone:                              Commission at 1-800-SEC-0330.              
tions and investment strategies          1-800-927-4648                          Reports and other information     
that significantly affected the          1-800-987-4626 (PIMCO                   about the Trust are available    
Funds' performance during its last       Infolink Audio Response                 on the Commission's Internet     
fiscal year or other period.             Network)                                site at www.sec.gov, and         
                                                                                 copies of that information       
STATEMENT OF ADDITIONAL INFORMATION                                              may be obtained, upon payment    
(SAI) The SAI contains additional                                                of a duplicating fee, by         
information about the Funds. A                                                   writing the Public Reference     
current SAI has been filed with                                                  Section of the Commission,   
the Securities and Exchange                                                      Washington, D.C. 20549-6009.    
Commission, and is incorporated                                                  
into this prospectus by reference.


SEC File Number: 811-06161

</TABLE> 
     PIMCO
- -----------------
            FUNDS

PIMCO FUNDS

840 Newport Center Drive
Suite 300
Newport Beach, CA 92660








   















<PAGE>
 
                                                         CLASS A, B AND C SHARES
                                                                NOVEMBER 1, 1998

                      PIMCO FUNDS ASSET ALLOCATION SERIES

                                  PROSPECTUS

               Actively managed portfolios of select PIMCO Funds

PIMCO Funds Asset Allocation Series consists of three actively managed mutual
funds that invest in a diversified portfolio of PIMCO Funds. In addition to
broad diversification, each Portfolio provides access to the extensive asset
allocation and investment management capabilities of PIMCO Advisors L.P. and its
affiliates.

<TABLE> 
<CAPTION> 
90/10 Portfolio                      60/40 Portfolio               30/70 Portfolio 
<S>                                  <C>                           <C> 
Seeks long-term capital              Seeks long-term capital       Seeks current income, with  
appreciation. The Portfolio          appreciation and current      long-term capital
normally invests approximately       income. The portfolio         appreciation as a secondary
90% of its assets                    normally invests              objective. The Portfolio
in PIMCO Stock Funds                 approximately 60% of its      normally invests
and 10% in PIMCO                     assets in PIMCO Stock         approximately 30% of its
Bond Funds.                          Funds and 40% in PIMCO        assets in PIMCO Stock
                                     Bond Funds.                   Funds and 70% in PIMCO
                                                                   Bond Funds.
</TABLE> 


                                                                           PIMCO
                                                                           -----
                                                                           FUNDS

<PAGE>
 
            PIMCO Funds: Multi-Manager Series
            Prospectus
            November 1, 1998
 
            PIMCO Funds Asset Allocation Series
 


90/10 PORTFOLIO
60/40 PORTFOLIO
30/70 PORTFOLIO

            PIMCO Funds: Multi-Manager Series (the "Trust") is an open-end se-
            ries management investment company offering three diversified in-
            vestment portfolios (each a "Portfolio") in this Prospectus, each
            with different investment objectives and strategies. The Portfo-
            lios are professionally-managed series of the Trust designed to
            take advantage of the benefits of asset allocation. Each Portfolio
            seeks to achieve its particular investment objective by investing
            within specified equity and fixed income ranges among a number of
            other mutual funds in the PIMCO Funds family ("Underlying Funds"
            or "Funds"). The address of PIMCO Funds: Multi-Manager Series is
            840 Newport Center Drive, Suite 300, Newport Beach, CA 92660.
 
            PIMCO Advisors L.P. ("PIMCO Advisors" or the "Adviser") serves as
            investment adviser to the Portfolios and determines how the assets
            of each Portfolio are allocated among the Underlying Funds. PIMCO
            Advisors and its affiliates also provide advisory services to the
            Underlying Funds. See "Management of the Portfolios."
 
            Each Portfolio offers three classes of shares in this Prospectus:
            Class A shares (generally sold subject to an initial sales
            charge), Class B shares (sold subject to a contingent deferred
            sales charge) and Class C shares (sold subject to an asset based
            sales charge).
 
            This Prospectus concisely describes the information investors
            should know before investing in Class A, Class B and Class C
            shares of the Portfolios. Please read this Prospectus carefully
            and keep it for further reference.
 
            Information about the investment objective of each Portfolio and
            of the investment policies and restrictions applicable to each
            Portfolio are set forth in this Prospectus. There can be no assur-
            ance that the investment objective of any Portfolio will be
            achieved. Because the market value of each Portfolio's investments
            will change, the investment returns and net asset value per share
            of each Portfolio will vary.
 
            A Statement of Additional Information, dated November 1, 1998, as
            amended or supplemented from time to time, is available free of
            charge by writing to PIMCO Funds Distributors LLC (the "Distribu-
            tor"), 2187 Atlantic Street, Stamford, Connecticut 06902, or by
            telephoning 1-800-426-0107. In addition, a Trust Prospectus dated
            November 1, 1998 and a Prospectus of PIMCO Funds: Pacific Invest-
            ment Management Series dated September 25, 1998, each as amended
            or supplemented from time to time (together, the "Underlying Fund
            Prospectuses"), relating to Institutional Class shares of the Un-
            derlying Funds, are available free of charge from the Distributor.
            The Statement of Additional Information and the Underlying Fund
            Prospectuses, which contain more detailed information about the
            Trust, the Portfolios and/or the Underlying Funds, have each been
            filed with the Securities and Exchange Commission and are incorpo-
            rated by reference in this Prospectus. The Securities and Exchange
            Commission maintains an Internet World Wide Web site (at
            www.sec.gov) which contains the Statement of Additional Informa-
            tion and materials that are incorporated by reference into this
            Prospectus and the Statement of Additional Information, the Under-
            lying Fund Prospectuses, and other information about the Trust,
            the Portfolios and the Underlying Funds.
 
            THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SE-
            CURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMIS-
            SION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
            SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
            PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OF-
            FENSE.
 
            SHARES OF THE PORTFOLIOS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
            GUARANTEED OR ENDORSED BY, ANY FINANCIAL INSTITUTION, AND THE
            SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT INSURANCE
            CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY, AND
            INVOLVE RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
              TABLE OF CONTENTS
 
<TABLE>
           <S>                                    <C> 
           Overview..............................  3
           Schedule of Fees......................  4
           Investment Objectives and Policies....  6
           Underlying Funds...................... 10
           Performance Information............... 16
           How to Buy Shares..................... 17
           Alternative Purchase Arrangements..... 21
           Exchange Privilege.................... 29
           How to Redeem......................... 30
           Distributor and Distribution and
            Servicing Plans...................... 34
           How Net Asset Value Is Determined....  36
           Distributions........................  36
           Taxes................................  37
           Management of the Portfolios.........  38
           Description of the Trust.............  43
           Mailings to Shareholders.............  44
</TABLE>
2  PIMCO Funds Asset Allocation Series
<PAGE>
 
            Overview
 
            PIMCO Funds: Multi-Manager Series (the "Trust") is an open-end se-
            ries management investment company organized as a Massachusetts
            business trust on August 24, 1990. This Prospectus describes three
            separate diversified investment portfolios (the "Portfolios") of-
            fered by the Trust, PIMCO Funds Asset Allocation Series--90/10
            Portfolio (the "90/10 Portfolio"), PIMCO Funds Asset Allocation
            Series--60/40 Portfolio (the "60/40 Portfolio") and PIMCO Funds
            Asset Allocation Series--30/70 Portfolio (the "30/70 Portfolio").
 
               The Portfolios are intended for investors who prefer to have
            their asset allocation decisions made by professional money manag-
            ers. Each Portfolio has a distinct investment objective which it
            seeks to achieve by investing within specified equity and fixed
            income ranges among certain series ("Underlying Funds" or "Funds")
            of the Trust and PIMCO Funds: Pacific Investment Management Se-
            ries. PIMCO Advisors serves as investment adviser for each Fund of
            the Trust and its affiliate, Pacific Investment Management Company
            ("Pacific Investment Management"), serves as investment adviser
            for each Fund of PIMCO Funds: Pacific Investment Management Se-
            ries. Some of the Underlying Funds invest primarily in equity se-
            curities ("Underlying Stock Funds"); other Funds invest primarily
            in fixed income securities, including money market instruments
            ("Underlying Bond Funds"). The Portfolios are named in accordance
            with their equity/fixed income allocation targets. For instance,
            the 90/10 Portfolio will normally invest approximately 90% of its
            assets in Underlying Stock Funds and 10% of its assets in Under-
            lying Bond Funds. The following summarizes certain key information
            relating to the Portfolios and is qualified in its entirety by the
            more detailed information contained elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
PORTFOLIO  PIMCO FUNDS
PROFILES   ASSET ALLOCATION SERIES INVESTMENT OBJECTIVE                              ALLOCATION STRATEGY
           --------------------------------------------------------------------------------------------------
           <C>                     <C>                                               <S>
           90/10 PORTFOLIO         Long-term capital appreciation                    Under normal conditions,
                                                                                     approximately 90% of the
                                                                                     Portfolio's assets will
                                                                                     be allocated among
                                                                                     Underlying Stock Funds
                                                                                     and 10% among Underlying
                                                                                     Bond Funds.
           --------------------------------------------------------------------------------------------------
           60/40 PORTFOLIO         Long-term capital appreciation and current income Under normal conditions,
                                                                                     approximately 60% of the
                                                                                     Portfolio's assets will
                                                                                     be allocated among
                                                                                     Underlying Stock Funds
                                                                                     and 40% among Underlying
                                                                                     Bond Funds.
           --------------------------------------------------------------------------------------------------
           30/70 PORTFOLIO         Current income, with long-term                    Under normal conditions,
                                   capital appreciation as a secondary objective     approximately 30% of the
                                                                                     Portfolio's assets will
                                                                                     be allocated among
                                                                                     Underlying Stock Funds
                                                                                     and 70% among Underlying
                                                                                     Bond Funds.
</TABLE>
 
 
               The Underlying Funds have different investment objectives and
            policies and different degrees of potential investment risk and
            reward. Based on the allocation strategies listed above, an in-
            vestor should choose among the Portfolios based on personal objec-
            tives, investment time horizon, tolerance for risk and personal
            financial circumstances. For example, because the 90/10 Portfolio
            will normally invest approximately 90% of its assets in Underlying
            Stock Funds, this Portfolio might be suitable for an investor with
            a relatively long time horizon who seeks long-term capital appre-
            ciation potential and has a fairly high tolerance for risk and
            volatility. An investor with a shorter time horizon who seeks a
            balance of income and long-term capital appreciation and has less
            tolerance for risk and volatility might choose the 60/40 Portfo-
            lio, which invests in a fairly balanced portfolio of Underlying
            Stock and Bond Funds. An investor who seeks a higher level of cur-
            rent income combined with some potential for long-term capital ap-
            preciation and has a lower tolerance for risk and volatility might
            choose the 30/70 Portfolio, which will normally invest approxi-
            mately 70% of its assets in Underlying Bond Funds. While each
            Portfolio provides a relatively high level of diversification in
            comparison to most mutual funds, a single Portfolio may not be
            suitable as a complete investment program. For a more complete de-
            scription of the investment objectives and policies of the Portfo-
            lios, please see "Investment Objectives and Policies."
 
               Because each Portfolio will invest all of its assets in the Un-
            derlying Funds, each Portfolio's investment performance is di-
            rectly related to the investment performance of the Underlying
            Funds in which it invests. The ability of a Portfolio to realize
            its investment objective will depend upon the extent to which the
            Underlying Funds realize their objectives. The value of the Under-
            lying Funds' investments, and the net asset values of the shares
            of both the Underlying Funds and the Portfolios, will fluctuate in
            response to changes in market and economic conditions, as well as
            the financial condition and prospects of issuers in which the Un-
            derlying Funds invest.
 
                                                  November 1, 1998 Prospectus  3
<PAGE>
 
 
               The possible use of certain investment techniques by an Under-
            lying Fund, including various derivative instruments such as
            futures contracts, options and swap agreements, will subject the
            Fund to greater risk than Funds that do not employ such tech-
            niques. In addition, investments by certain Underlying Funds in
            small market capitalization companies, foreign issuers (including
            emerging market issuers) and foreign currencies, illiquid securi-
            ties and other instruments will expose those Funds to a higher de-
            gree of risk and price volatility. Some Underlying Funds may also
            invest in fixed income securities rated below investment grade
            (commonly referred to as "high yield" securities or "junk" bonds),
            which are considered to be speculative by traditional investment
            standards. Each Portfolio may be subject to these and other risks
            associated with investments in the Underlying Funds depending upon
            the Portfolio's asset allocation strategy. For a description of
            the various risks associated with the Portfolios and the Under-
            lying Funds, see "Investment Objectives and Policies" and "Under-
            lying Funds" in this Prospectus, "Investment Objectives and Poli-
            cies" in the Statement of Additional Information and "Characteris-
            tics and Risks of Securities and Investment Techniques" in the Un-
            derlying Fund Prospectuses, which are incorporated herein by ref-
            erence and are available free of charge by telephoning the Dis-
            tributor at 1-800-426-0107.
 
               Potential investors in the Portfolios should realize that they
            may invest directly in the Underlying Funds and make their own as-
            set allocation decisions. By investing in a Portfolio, an investor
            will incur not only a proportionate share of the expenses of the
            Portfolio but also a portion of the expenses of the Underlying
            Funds in which the Portfolio invests (including investment advi-
            sory and administrative fees charged at the Underlying Fund lev-
            el).  See "Schedule of Fees" and "Management of the Portfolios--
            Underlying Fund Expenses."
 
            Schedule of Fees
 
            Expenses are one of several factors to consider when investing in
            Class A, Class B or Class C shares of the Portfolios. The follow-
            ing tables and Examples summarize the expenses of each Portfolio
            that are borne by its Class A, Class B and Class C shareholders
            based on estimated expenses for the Portfolio's current fiscal
            year.
               You should bear in mind that shareholders of each Portfolio
            bear indirectly the expenses of the Underlying Funds in which the
            Portfolio invests. The Portfolios will invest only in Institu-
            tional Class shares of the Underlying Funds and will not pay any
            sales charges or 12b-1 fees in connection with their investments
            in the Underlying Funds. The Portfolios will, however, indirectly
            bear their pro rata share of the fees and expenses (including ad-
            visory and administrative fees) incurred by the Underlying Funds
            that are borne by all Institutional Class shareholders. Because
            the Underlying Funds have varied fee and expense levels and the
            Portfolios will own different proportions of the Underlying Funds
            at different times, the actual fees and expenses indirectly in-
            curred by the Portfolios will vary.
 
<TABLE>
<CAPTION>
SHAREHOLDER
TRANSACTION
EXPENSES
                                                      CLASS A     CLASS B     CLASS C
                                                      SHARES      SHARES      SHARES
             -------------------------------------------------------------------------
             <S>                                      <C>         <C>         <C>
             MAXIMUM INITIAL SALES CHARGE IM-
              POSED ON PURCHASES
              (as a percentage of offering
              price at time of purchase)
               90/10 Portfolio and 60/40 Portfolio     5.50%       None        None
               30/70 Portfolio                         4.50%       None        None
             -------------------------------------------------------------------------
             MAXIMUM SALES CHARGE IMPOSED ON
              REINVESTED DIVIDENDS
              (as a percentage of net asset
              value at time of purchase)                None       None        None
             -------------------------------------------------------------------------
             MAXIMUM CONTINGENT DEFERRED SALES
              CHARGE ("CDSC")
              (as a percentage of original
              purchase price)                             1%(/1/)    5%(/2/)     1%(/3/)
             -------------------------------------------------------------------------
             EXCHANGE FEE                               None       None        None
</TABLE>
            1. Imposed only in certain circumstances where Class A shares are
            purchased without a front-end sales charge at the time of pur-
            chase. See "Alternative Purchase Arrangements."
            2. The maximum CDSC is imposed on shares redeemed in the first
            year. For shares held longer than one year, the CDSC declines ac-
            cording to the schedule set forth under "Alternative Purchase Ar-
            rangements--Deferred Sales Charge Alternative--Class B Shares."
            3. The CDSC on Class C shares is imposed only on shares redeemed
            in the first year.
 
4  PIMCO Funds Asset Allocation Series

<PAGE>
 
<TABLE>
<CAPTION>
                                                                                       EXAMPLE: You  EXAMPLE: You
                                                                                       would pay     would pay
                                                                                       the           the
                                                                                       following     following
                                                                                       expenses on   expenses on
                                                                                       a $1,000      a $1,000
                                                                                       investment    investment
                                                                                       assuming      assuming (1)
                                                                                       (1) 5%        5% annual
                                                                                       annual        return and
                                                                                       return and    (2) no
                                                                                       (2)           redemption:
                                                                                       redemption
                                                                                       at the end
                              ANNUAL PORTFOLIO OPERATING EXPENSES                      of each time
                              (As a percentage of average net assets):                 period:
                                                                         TOTAL
           PIMCO FUNDS                 ADMINI-             UNDERLYING    PORTFOLIO
           ASSET ALLOCATION   ADVISORY STRATIVE  12B-1     FUND          OPERATING     ONE    THREE  ONE    THREE
           SERIES             FEES     FEES(/1/) FEES(/2/) EXPENSES(/3/) EXPENSES(/3/) YEAR   YEARS  YEAR   YEARS
           -------------------------------------------------------------------------------------------------------
<S>                           <C>      <C>       <C>       <C>           <C>           <C>    <C>    <C>    <C>
CLASS A    90/10 PORTFOLIO    None     .40%       .25%     .79%          1.44%         $   69 $   98 $   69 $   98
SHARES     -------------------------------------------------------------------------------------------------------
           60/40 PORTFOLIO    None     .40        .25      .67           1.32              68     95     68     95
           -------------------------------------------------------------------------------------------------------
           30/70 PORTFOLIO    None     .40        .25      .55           1.20              57     81     57     81


CLASS B    90/10 PORTFOLIO    None     .40       1.00      .79           2.19              72     99     22     69
SHARES     -------------------------------------------------------------------------------------------------------
           60/40 PORTFOLIO    None     .40       1.00      .67           2.07              71     95     21     65
           -------------------------------------------------------------------------------------------------------
           30/70 PORTFOLIO    None     .40       1.00      .55           1.95              70     91     20     61


CLASS C    90/10 PORTFOLIO    None     .40       1.00      .79           2.19              32     69     22     69
SHARES     -------------------------------------------------------------------------------------------------------
           60/40 PORTFOLIO    None     .40       1.00      .67           2.07              31     65     21     65
           -------------------------------------------------------------------------------------------------------
           30/70 PORTFOLIO    None     .40       1.00      .55           1.95              30     61     20     61
</TABLE>

            1. The Administrative Fees for each Portfolio are subject to re-
            duction to the extent that the average net assets attributable in
            the aggregate to the Portfolio's Class A, Class B and Class C
            shares exceed $2.5 billion. See "Management of the Portfolios--Ad-
            ministrative Fees."
            2. 12b-1 fees which are equal to .25% represent servicing fees
            which are paid annually to the Distributor and repaid to partici-
            pating brokers, certain banks and other financial intermediaries.
            12b-1 fees which exceed .25% represent aggregate distribution and
            servicing fees. See "Distributor and Distribution and Servicing
            Plans."
            3. Based on estimated expenses for the current fiscal year. Under-
            lying Fund Expenses for each Portfolio are estimated based upon
            the initial allocation of each Portfolio's assets among the Under-
            lying Funds and upon the total annual operating expenses of each
            Underlying Fund. For a listing of the expenses associated with
            each Underlying Fund, please see "Management of the Portfolios--
            Underlying Fund Expenses." Total Portfolio Operating Expenses and
            the Examples set forth above are based on estimates of the Under-
            lying Fund Expenses each Portfolio will incur. Actual Underlying
            Fund Expenses for each Portfolio are expected to vary with changes
            in the allocation of the Portfolio's assets, and may be higher or
            lower than those shown above.
 
            The purpose of the foregoing tables is to assist investors in un-
            derstanding the various costs and expenses of the Trust that are
            borne directly or indirectly by Class A, Class B and Class C
            shareholders of the Portfolios. The Examples for Class A shares
            assume payment of the current maximum applicable sales load. Due
            to the 12b-1 distribution fee imposed on Class B and Class C
            shares, a Class B or Class C shareholder of a Portfolio may, de-
            pending on the length of time the shares are held, pay more than
            the economic equivalent of the maximum front-end sales charges
            permitted by relevant rules of the National Association of Securi-
            ties Dealers, Inc.
 
            NOTE: THE FIGURES SHOWN IN THE EXAMPLES ARE ENTIRELY HYPOTHETICAL.
            THEY ARE NOT REPRESENTATIONS OF PAST OR FUTURE PERFORMANCE OR EX-
            PENSES; ACTUAL PERFORMANCE AND/OR EXPENSES MAY BE MORE OR LESS
            THAN SHOWN.
 
                                                  November 1, 1998 Prospectus  5
<PAGE>
 
            Investment Objectives and Policies

            The investment objective and general investment policies of each
            Portfolio are described below. There can be no assurance that the
            investment objective of any Portfolio will be achieved. Because
            the market value of each Portfolio's investments will change, the
            net asset value per share of each Portfolio will also vary.
               The Portfolios are intended for investors who prefer to have
            their asset allocation decisions made by professional money manag-
            ers. Each Portfolio seeks to achieve its investment objective by
            investing within specified equity and fixed income ranges among
            the Underlying Funds. Each Underlying Fund is a series of the
            Trust or PIMCO Funds: Pacific Investment Management Series and is
            managed by PIMCO Advisors and/or its affiliates. The Portfolios
            have different investment objectives and policies and degrees of
            potential investment risk and reward depending upon their alloca-
            tion strategies. An investor should choose a Portfolio based on
            personal objectives, investment time horizon, tolerance for risk
            and personal financial circumstances.
 
 
PORTFOLIO   90/10 PORTFOLIO seeks long-term capital appreciation. Under normal
DESCRIPTIONSconditions, approximately 90% of the Portfolio's assets will be
            allocated among Underlying Stock Funds and 10% among Underlying
            Bond Funds.
 
            60/40 PORTFOLIO seeks long-term capital appreciation and current
            income. Under normal conditions, approximately 60% of the Portfo-
            lio's assets will be allocated among Underlying Stock Funds and
            40% among Underlying Bond Funds.
 
            30/70 PORTFOLIO seeks current income. Long-term capital apprecia-
            tion is a secondary objective. Under normal conditions, approxi-
            mately 30% of the Portfolio's assets will be allocated among Un-
            derlying Stock Funds and 70% among Underlying Bond Funds.
               Unless otherwise noted, each Portfolio's investment objective
            and its restrictions and policies relating to the investment of
            its assets are non-fundamental and may be changed without share-
            holder approval.
 
               PIMCO Advisors serves as the investment adviser to the Portfo-
            lios and determines how each Portfolio's assets are allocated
            among the Underlying Funds. Each Portfolio invests in particular
            Underlying Funds (which may differ from time to time) based on
            various criteria observed by PIMCO Advisors. Among other things,
            PIMCO Advisors analyses the various investment objectives, poli-
            cies and strategies of the Underlying Funds to determine which
            Funds, in combination with others, are appropriate in light of a
            Portfolio's investment objective. PIMCO Advisors then makes allo-
            cation decisions among these Underlying Funds in an attempt to
            achieve the Portfolio's objective. The table below illustrates the
            initial equity and fixed income allocation targets and typical
            ranges for each Portfolio under normal market conditions.
 
            EQUITY AND FIXED INCOME RANGES
            (as a percentage of each Portfolio's average net assets)
 
<TABLE>
<CAPTION>
                                                                TYPICAL
           PIMCO FUNDS                               TARGET     ALLOCATION
           ASSET ALLOCATION SERIES                   ALLOCATION RANGE*
           ---------------------------------------------------------------
           <S>                                       <C>        <C>
           90/10 PORTFOLIO
            Equity                                   90%        80% - 100%
            Fixed Income (including money market**)  10%         0% -  20%
           ---------------------------------------------------------------
           60/40 PORTFOLIO
            Equity                                   60%        50% -  70%
            Fixed Income (including money market**)  40%        30% -  50%
           ---------------------------------------------------------------
           30/70 PORTFOLIO
            Equity                                   30%        25% -  35%
            Fixed Income (including money market**)  70%        65% -  75%
</TABLE>
 
             * Each Portfolio may temporarily deviate from its asset alloca-
            tion range for defensive purposes.
            ** Each Portfolio may hold a portion of its assets in PIMCO Money
             Market Fund, in part, so that it can readily sell the securities
             and have cash available to pay Portfolio expenses without incur-
             ring capital gains.
 
6  PIMCO Funds Asset Allocation Series

<PAGE>
 
 
               Each Portfolio is authorized to invest in any or all of the Un-
            derlying Funds. However, it is expected that a Portfolio will in-
            vest in only some of the Underlying Funds at any particular time.
            A Portfolio's investment in a particular Underlying Fund may and
            in some cases is expected to exceed 25% of its total assets. To
            the extent that a Portfolio invests a significant portion of its
            assets in an Underlying Fund, it will be particularly sensitive to
            the risks associated with that Fund. Please see "Underlying Funds"
            and "Principal Risks of the Underlying Funds" below for a descrip-
            tion of the Underlying Funds and their attendant risks. The par-
            ticular Underlying Funds in which each Portfolio may invest, the
            equity and fixed income allocation targets and ranges specified
            above, and the percentage of each Portfolio's assets invested from
            time to time in any Underlying Fund or combination of Funds may be
            changed from time to time without the approval of the Portfolio's
            shareholders.
               Each Portfolio's net asset value will fluctuate in response to
            changes in the net asset values of the Underlying Funds in which
            it invests. Each Portfolio will invest all of its assets in Under-
            lying Funds, and may invest up to 100% of its assets in PIMCO
            Money Market Fund (and thereby deviate from its asset allocation
            range) for temporary defensive purposes. A Portfolio may also bor-
            row money for temporary or emergency purposes.
               Each Portfolio is also subject to certain investment restric-
            tions that are described under "Investment Restrictions" in the
            Statement of Additional Information.
 
 
OVERVIEW OF PIMCO Advisors' Asset Allocation Committee determines how the
ASSET       Portfolios' assets are allocated and reallocated from time to time
ALLOCATION  among the Underlying Funds. The individuals who constitute the As-
            set Allocation Committee and are primarily responsible for making
            asset allocation and other investment decisions for the Portfolios
            are William D. Cvengros, Timothy R. Clark, Robert S. Venable, Da-
            vid Young and Edward P. Rennie. Please see "Management of the
            Portfolios" for a description of PIMCO Advisors and the individu-
            als on the Asset Allocation Committee.
               PIMCO Advisors' approach to asset allocation encompasses both
            quantitative and qualitative processes designed to allocate the
            Portfolios' assets among multiple Underlying Funds in order to
            achieve broadly diversified Portfolios. The Asset Allocation Com-
            mittee meets regularly to analyze various economic and market da-
            ta. The Committee also collects and synthesizes multiple proprie-
            tary models maintained by the Portfolio Managers of the Underlying
            Funds, each of which is an affiliate of PIMCO Advisors. See "Man-
            agement of the Portfolios--Portfolio Managers for the Underlying
            Funds." These models are quantitatively compiled by the Committee
            to provide a framework for developing PIMCO Advisors' allocation
            strategies with respect to the major asset classes and sub-classes
            held by the Underlying Funds.
               The resulting framework assists the Asset Allocation Committee
            in the following ways: (1) it identifies the desired tactical al-
            location ranges for the Portfolios around long-term strategic
            broad asset class and sub-class targets, (2) it identifies indi-
            vidual Funds among the Underlying Funds that are expected to pro-
            vide consistent, quality performance in the various asset classes
            and sub-classes identified for the Portfolios, and (3) it is used
            by the Committee in its on-going evaluation of the equity and
            fixed income markets in an attempt to identify and implement val-
            ue-added tactical shifts for the Portfolios. These tactical shifts
            and resulting reallocations of Portfolio assets are not expected
            to be large or frequent in nature, and should result in modest
            levels of portfolio turnover for the Portfolios. See "Portfolio
            Turnover."
 
 
       
EQUITY      The equity portion of each Portfolio will be allocated among a
PORTION OF  number of Underlying Stock Funds which provide a broad range of
THE         equity-based investment objectives and strategies. By allocating
PORTFOLIOS  assets among these Funds, the equity portions of the Portfolios
            can be diversified in multiple ways, including the following:
 
            BY REGION
                - U.S. Equities
                - International Developed Markets Equities
                - International Emerging Markets Equities
 
                                                 November 1, 1998 Prospectus  7
<PAGE>
 
 
            BY INVESTMENT STYLE
                - Blend (Broad Market)
                - Value
                - Growth
 
            BY SIZE
                - Large-Cap
                - Mid-Cap
                - Small-Cap
 
               For a description of the Underlying Stock Funds and their in-
            vestment objectives and strategies, please see "Underlying Funds."
            The Portfolio Managers for the Underlying Stock Funds each have
            different investment philosophies and processes which are re-
            flected in the Funds they manage. Through asset allocation, PIMCO
            Advisors can take advantage of the expertise of each Portfolio
            Manager and combine the investment styles set forth above in pro-
            viding broadly diversified Portfolios. For a description of each
            Portfolio Manager and its particular investment philosophy and
            process, please see "Management of the Portfolios--Portfolio Man-
            agers for the Underlying Funds."
 
 
FIXED       The fixed income portion of each Portfolio will be allocated among
INCOME      a number of Underlying Bond Funds which provide a broad range of
PORTION OF  fixed income-based investment objectives and strategies. By allo-
THE         cating assets among these Funds, the fixed income portions of the
PORTFOLIOS  Portfolios can be diversified in multiple ways, including the fol-
            lowing:
 
            BY REGION
                - U.S. Fixed Income
                - Foreign Fixed Income
 
            BY SECTOR/INVESTMENT SPECIALTY
                - Governments
                - Mortgages
                - Corporate
                - Inflation Indexed
 
            BY CREDIT QUALITY
                - Investment Grade/Money Market
                - Medium Grade
                - High Yield
 
            BY DURATION
                - Long-Term
                - Intermediate-Term
                - Short-Term
 
               For a description of the Underlying Bond Funds and their in-
            vestment objectives and strategies, please see "Underlying Funds."
            Pacific Investment Management is the investment adviser and Port-
            folio Manager for each Underlying Bond Fund. Through asset alloca-
            tion, PIMCO Advisors can take advantage of the broad fixed income
            expertise of Pacific Investment Management and combine the invest-
            ment styles set forth above in providing broadly diversified Port-
            folios. For a description of Pacific Investment Management and its
            investment philosophy and process, please see "Management of the
            Portfolios--Portfolio Managers for the Underlying Funds."
 
8  PIMCO Funds Asset Allocation Series
<PAGE>
 
 
POTENTIAL   As described above, PIMCO Advisors has broad discretion to allo-
CONFLICTS   cate and reallocate the Portfolios' assets among the Underlying
OF INTEREST Funds consistent with the Portfolios' investment objectives and
            policies and the asset allocation ranges specified above. Although
            PIMCO Advisors does not charge an investment advisory fee for its
            asset allocation services, PIMCO Advisors and its affiliates indi-
            rectly receive fees (including investment advisory and administra-
            tive fees) from the Underlying Funds in which the Portfolios in-
            vest. In this regard, PIMCO Advisors has a financial incentive to
            invest a Portfolio's assets in Underlying Funds with higher fees
            than other Funds, even if it believes that alternate investments
            would better serve the Portfolio's investment program. PIMCO Advi-
            sors is legally obligated to disregard that incentive in making
            asset allocation decisions for the Portfolios. The Trustees and
            officers of the Trust may also have conflicting interests in ful-
            filling their fiduciary duties to both the Portfolios and the Un-
            derlying Funds.
 
 
GENERAL     Because the Portfolios invest all of their assets in the Under-
RISKS OF    lying Funds, the risks associated with investing in the Portfolios
INVESTING   are closely related to the risks associated with the securities
IN THE      held by the Underlying Funds. The ability of a Portfolio to
PORTFOLIOS  achieve its investment objective will depend upon the ability of
            the Underlying Funds to achieve their objectives. Of course, the
            extent to which the investment performance and risks associated
            with a particular Portfolio correlate to those of a particular Un-
            derlying Fund will depend upon the extent to which the Portfolio's
            assets are allocated from time to time for investment in the Un-
            derlying Fund. For a description of the principal risks associated
            with investments in the Underlying Funds, please see "Underlying
            Funds--Principal Risks of the Underlying Funds" in this Prospec-
            tus, "Investment Objectives and Policies" in the Statement of Ad-
            ditional Information and "Characteristics and Risks of Securities
            and Investment Techniques" in the Underlying Fund Prospectuses,
            which are incorporated herein by reference and are available free
            of charge by telephoning the Distributor at 1-800-426-0107.
 
 
PORTFOLIO   A change in the securities held by a Portfolio is known as "port-
TURNOVER    folio turnover." Because PIMCO Advisors does not expect to reallo-
            cate the Portfolios' assets among the Underlying Funds on a fre-
            quent basis, the portfolio turnover rates for the Portfolios are
            expected to be modest (i.e., less than 25%) in comparison to most
            mutual funds. However, the Portfolios' indirectly bear the ex-
            penses associated with portfolio turnover of the Underlying Funds,
            a number of which have fairly high portfolio turnover rates (i.e.,
            in excess of 100%). High portfolio turnover involves correspond-
            ingly greater expenses to an Underlying Fund, including brokerage
            commissions or dealer mark-ups and other transaction costs on the
            sale of securities and reinvestments in other securities. Share-
            holders in the Portfolios may also bear expenses directly or indi-
            rectly through sales of securities held by the Portfolios and the
            Underlying Funds which result in realization of ordinary income or
            taxable capital gains (including short-term capital gains which
            are generally taxed at ordinary income tax rates). See "Taxes."
 
 
SERVICE     Many of the services provided to the Portfolios depend on the
SYSTEMS --  smooth functioning of computer systems. Many systems in use today
YEAR 2000   cannot distinguish between the year 1900 and the year 2000. Should
PROBLEM     any of the service systems fail to process information properly,
            that could have an adverse impact on the Portfolios' operations
            and services provided to shareholders. The Adviser, Distributor,
            Shareholder Servicing and Transfer Agent, Custodian, and certain
            other service providers to the Portfolios have reported that each
            is working toward mitigating the risks associated with the so-
            called "year 2000 problem." However, there can be no assurance
            that the problem will be corrected in all respects and that the
            Portfolios' operations and services provided to shareholders will
            not be adversely affected, nor can there be any assurance that the
            year 2000 problem will not have an adverse effect on the entities
            whose securities are held by the Underlying Funds or on domestic
            or global equity markets or economies, generally.
 
 
"FUNDAMENTAL"
POLICIES
            The investment objective of each Portfolio described in this Pro-
            spectus may be changed by the Board of Trustees without share-
            holder approval. If there is a change in a Portfolio's investment
            objective, shareholders should consider whether the Portfolio re-
            mains an appropriate investment in light of their then current fi-
            nancial positions and needs.
 
                                                 November 1, 1998 Prospectus  9
<PAGE>
 
            Underlying Funds

            Each Portfolio invests all of its assets in Underlying Funds. Ac-
            cordingly, each Portfolio's investment performance depends upon a
            favorable allocation among the Underlying Funds as well as the
            ability of the Underlying Funds to meet their objectives. There
            can be no assurance that the investment objective of any Under-
            lying Fund will be achieved. Shares of the Underlying Funds are
            not offered in this Prospectus.
 
 
PORTFOLIO   PIMCO Advisors serves as investment adviser for each of the Under-
MANAGERS    lying Stock Funds and its affiliates serve as sub-advisers, except
            that another affiliate, Pacific Investment Management, is the sole
            investment adviser to PIMCO StocksPLUS Fund. Under these arrange-
            ments, the sub-advisers and Pacific Investment Management (re-
            ferred to collectively as "Portfolio Managers") have full invest-
            ment discretion and make all determinations with respect to the
            investment of the assets of these Funds. Pacific Investment Man-
            agement is also the sole investment adviser to each Underlying
            Bond Fund. The Portfolio Managers and their investment specialties
            are listed below.
 
 
<TABLE>
<CAPTION>
           PORTFOLIO MANAGER                                  INVESTMENT SPECIALTY
           ----------------------------------------------------------------------------
           <C>                                                <S>
           PACIFIC INVESTMENT MANAGEMENT                      All sectors of the bond
                                                              market using its total
                                                              return philosophy--
                                                              seeking both yield and
                                                              capital appreciation
           ----------------------------------------------------------------------------
           COLUMBUS CIRCLE INVESTORS ("COLUMBUS CIRCLE")      Stocks, using its
                                                              "Positive Momentum &
                                                              Positive Surprise"
                                                              discipline
           ----------------------------------------------------------------------------
           CADENCE CAPITAL MANAGEMENT ("CADENCE")             Stocks of growth
                                                              companies that the
                                                              Portfolio Manager
                                                              believes are trading at
                                                              a reasonable price
           ----------------------------------------------------------------------------
           NFJ INVESTMENT GROUP ("NFJ")                       Value stocks that the
                                                              Portfolio Manager
                                                              believes are undervalued
                                                              and/or offer above-
                                                              average dividend yields
           ----------------------------------------------------------------------------
           BLAIRLOGIE CAPITAL MANAGEMENT ("BLAIRLOGIE") (/1/) International stocks
                                                              using Scottish standards
                                                              of prudent investment
                                                              management with modern
                                                              quantitative analytical
                                                              tools
           ----------------------------------------------------------------------------
           PARAMETRIC PORTFOLIO ASSOCIATES ("PARAMETRIC")     Stocks, using
                                                              quantitatively-driven
                                                              fundamental analysis and
                                                              economic methods, with
                                                              specialties in emerging
                                                              markets and tax-
                                                              efficient products
</TABLE>
 
            1. On or before March 31, 1999, it is anticipated that PIMCO
               Advisors will sell substantially all of its ownership interest
               in Blairlogie, in which case Blairlogie would no longer serve
               as a Portfolio Manager for any Underlying Fund. See "Management
               of the Portfolios--Portfolio Managers for the Underlying
               Funds--Blairlogie."
 
10  PIMCO Funds Asset Allocation Series

<PAGE>
 
UNDERLYING  The following provides a concise description of the investment ob-
STOCK FUNDS jective and primary investments of each Underlying Stock Fund and
            lists the Fund's Portfolio Manager. For a complete description of
            these Funds, please see the Underlying Fund Prospectuses, which
            are incorporated herein by reference and are available free of
            charge by telephoning the Distributor at 1-800-426-0107.
 
 
 
<TABLE>
<CAPTION>
                                                                                                     PORTFOLIO
                         FUND NAME              INVESTMENT OBJECTIVE     PRIMARY INVESTMENTS         MANAGER
          -----------------------------------------------------------------------------------------------------------
          <S>            <C>                    <C>                      <C>                         <C>
          STOCK FUNDS    PIMCO Equity Income    Current income as a      Common stocks with below-   NFJ
                                                primary objective; long- average price to earnings
                                                term growth of capital   ratios and higher dividend
                                                as a secondary objective yields relative to their
                                                                         industry groups
                         ----------------------------------------------------------------------------------------
                         PIMCO Renaissance      Long-term growth of      Common stocks with below-   Columbus Circle
                                                capital and income       average valuations that
                                                                         have improving business
                                                                         fundamentals
                         ----------------------------------------------------------------------------------------
                         PIMCO Core Equity      Long-term growth of      Common stocks of companies  Columbus Circle
                                                capital; income as a     with market
                                                secondary objective      capitalizations in excess
                                                                         of $3 billion
                         ----------------------------------------------------------------------------------------
                         PIMCO Mid-Cap Equity   Long-term growth of      Common stocks of companies  Columbus Circle
                                                capital                  with market
                                                                         capitalizations between
                                                                         $800 million and $3
                                                                         billion
                         ----------------------------------------------------------------------------------------
                         PIMCO Value            Long-term growth of      Common stocks with below-   NFJ
                                                capital and income       average price to earnings
                                                                         ratios relative to their
                                                                         industry groups
                         ----------------------------------------------------------------------------------------
                         PIMCO Value 25         Long-term growth of      Approximately 25 common     NFJ
                                                capital and income       stocks of companies with
                                                                         medium market
                                                                         capitalizations and below-
                                                                         average price to earnings
                                                                         ratios relative to their
                                                                         industry groups
                         ----------------------------------------------------------------------------------------
                         PIMCO Capital          Growth of capital        Common stocks of companies  Cadence
                         Appreciation                                    with market
                                                                         capitalizations of at
                                                                         least $1 billion that have
                                                                         improving fundamentals and
                                                                         whose stock is reasonably
                                                                         valued by the market
                         ----------------------------------------------------------------------------------------
                         PIMCO Mid-Cap Growth   Growth of capital        Common stocks of companies  Cadence
                                                                         with market
                                                                         capitalizations in excess
                                                                         of $500 million that have
                                                                         improving fundamentals and
                                                                         whose stock is reasonably
                                                                         valued by the market
                         ----------------------------------------------------------------------------------------
                         PIMCO Enhanced Equity  Total return which       Commons stocks represented  Parametric
                                                equals or exceeds the    in the S&P 500
                                                total return performance
                                                of an index representing
                                                the performance of a
                                                reasonably broad
                                                spectrum of common
                                                stocks (currently the
                                                S&P 500 (/2/))
                         ----------------------------------------------------------------------------------------
                         PIMCO Tax-Efficient    Maximum after-tax growth A broadly diversified       Parametric
                         Equity                 of capital               portfolio of at least 200
                                                                         common stocks of companies
                                                                         with larger
                                                                         market capitalizations
          -----------------------------------------------------------------------------------------------------------
          AGGRESSIVE     PIMCO Small-Cap Value  Long-term growth of      Common stocks of companies  NFJ
          STOCK FUNDS                           capital and income       with market
                                                                         capitalizations between
                                                                         $50 million and $1 billion
                                                                         and below-average price to
                                                                         earnings ratios relative
                                                                         to their industry groups
                         ----------------------------------------------------------------------------------------
                         PIMCO Small-Cap Growth Growth of capital        Common stocks of companies  Cadence
                                                                         with market
                                                                         capitalizations between
                                                                         $50 million and $1 billion
                                                                         that have improving
                                                                         fundamentals and whose
                                                                         stock is reasonably valued
                                                                         by the market
                         ----------------------------------------------------------------------------------------
                         PIMCO Micro-Cap Growth Long-term growth of      Common stocks of companies  Cadence
                                                capital                  with market
                                                                         capitalizations of less
                                                                         than $100 million that
                                                                         have improving
                                                                         fundamentals and whose
                                                                         stock is reasonably valued
                                                                         by the market
          -----------------------------------------------------------------------------------------------------------
          INTERNATIONAL  PIMCO International    Capital appreciation;    Non-U.S. stocks of          Blairlogie (/1/)
          STOCK FUNDS                           income is incidental     companies with small,
                                                                         medium and large market
                                                                         capitalizations (developed
                                                                         and emerging markets)
                         ----------------------------------------------------------------------------------------
                         PIMCO International    Long-term capital        An international portfolio  Columbus Circle
                         Growth                 appreciation             of equity and equity-
                                                                         related securities
                         ----------------------------------------------------------------------------------------
                         PIMCO Structured       Long-term growth of      Common stocks of companies  Parametric
                         Emerging Markets       capital                  located in emerging market
                                                                         countries
                         ----------------------------------------------------------------------------------------
                         PIMCO Tax-Efficient    Same as PIMCO Structured Common stocks of companies  Parametric
                         Structured             Emerging Markets Fund,   located in emerging market
                         Emerging Markets       except that the Fund     countries
                                                seeks to achieve
                                                superior after-tax
                                                returns by employing a
                                                variety of tax-efficient
                                                management strategies
          -----------------------------------------------------------------------------------------------------------
          SPECIALIZED    PIMCO Innovation       Capital appreciation; no Common stocks of companies  Columbus Circle
          STOCK FUNDS                           consideration            with small, medium and
                                                given to income          large market
                                                                         capitalizations
                                                                         (technology-related stocks)
                         ----------------------------------------------------------------------------------------
                         PIMCO StocksPLUS       Total return which       S&P 500 stock index         Pacific
                                                exceeds the total        derivatives backed by       Investment
                                                return performance of    a portfolio of fixed        Management
                                                the S&P 500              income securities
</TABLE>
 
            1. On or before March 31, 1999, it is anticipated that PIMCO Advi-
               sors will sell substantially all of its ownership interest in
               Blairlogie and assume full portfolio management responsibility
               for PIMCO International Fund.
            2. The Standard & Poor's 500 Composite Stock Price Index.
 
                                                 November 1, 1998 Prospectus  11
<PAGE>
 
UNDERLYING  Pacific Investment Management has full investment discretion and
BOND FUNDS  makes all determinations with respect to the investment of the as-
            sets of each Underlying Bond Fund.
               The investment objective of each Underlying Bond Fund (except
            as provided below) is to seek to realize maximum total return,
            consistent with preservation of capital and prudent investment
            management. The "total return" sought by most of the Underlying
            Bond Funds will consist of interest and dividends from underlying
            securities and capital appreciation or depreciation reflected in
            changes in the value of portfolio securities. The investment ob-
            jective of PIMCO Real Return Bond Fund is to seek to realize maxi-
            mum real return, consistent with preservation of real capital and
            prudent investment management. "Real return" is total return ad-
            justed for inflation. The investment objective of each of PIMCO
            Money Market Fund and PIMCO Short-Term Fund is to seek to obtain
            maximum current income consistent with preservation of capital and
            daily liquidity. PIMCO Money Market Fund also attempts to maintain
            a stable net asset value of $1.00 per share, although there can be
            no assurance that it will be successful in doing so.
               The following provides a concise description of the primary in-
            vestments of and other information relating to each Underlying
            Bond Fund. For a complete description of these Funds, please see
            the Underlying Fund Prospectus for PIMCO Funds: Pacific Investment
            Management Series, which is incorporated herein by reference and
            is available free of charge by telephoning the Distributor at 1-
            800-426-0107.
 
<TABLE>
<CAPTION>
                FUND NAME                       PRIMARY INVESTMENTS         DURATION         CREDIT QUALITY(/1/)        FOREIGN(/2/)
- ------------------------------------------------------------------------------------------------------------------------------------
 <C>            <C>                             <S>                         <C>              <C>                        <C> 
 SHORT-TERM     PIMCO Money Market              Money market instruments    (less than or     Min 95% Aaa or Prime 1;   0%
 BOND                                                                       equal to) 90 days (less than or equal to)
 FUNDS                                                                      dollar-weighted   5% Aa or Prime 2
                                                                            average maturity
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Short-Term                Money market instruments    0-1 yr           B to Aaa; max 10%          0-5%
                                                and short maturity                           below Baa
                                                fixed                       
                                                income securities           
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Low Duration              Short and intermediate      1-3 yrs          B to Aaa; max 10%          0-20%
                                                maturity fixed income                        below Baa
                                                securities                  
- ------------------------------------------------------------------------------------------------------------------------------------
 INTERMEDIATE-  PIMCO Moderate Duration         Short and intermediate      2-5 yrs          B to Aaa; max 10%          0-20%
 TERM                                           maturity fixed income                        below Baa
 BOND FUNDS                                     securities                  
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Real Return Bond          Inflation-indexed fixed     N/A              B to Aaa; max 10%          0-35%
                                                income securities                            below Baa
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Total Return              Intermediate maturity       3-6 yrs          B to Aaa; max 10%          0-20%
                                                fixed income securities                      below Baa
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Total Return II           Same as PIMCO Total Return  3-6 yrs          Baa to Aaa                 0%
                                                Fund, except that the       
                                                Fund is subject to credit   
                                                quality and                 
                                                foreign issuer              
                                                restrictions                
                --------------------------------------------------------------------------------------------------------------------
                PIMCO High Yield                Higher yielding fixed       2-6 yrs          B to Aaa; min 65%          0%
                                                income securities                            below Baa
- ------------------------------------------------------------------------------------------------------------------------------------
 LONG-TERM      PIMCO Long-Term U.S. Government Long-term maturity          (greater than or A to Aaa                   0%
 BOND                                           fixed income securities     equal to) 8 yrs
 FUNDS                                                                      
- ------------------------------------------------------------------------------------------------------------------------------------
 INTERNATIONAL  PIMCO Global Bond               Intermediate maturity       3-7 yrs          B to Aaa; max 10%          25%-75%
 BOND                                           U.S. and foreign fixed                       below Baa
 FUNDS                                          income                      
                                                securities                  
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Foreign Bond              Intermediate maturity       3-7 yrs          B to Aaa; max 10%          (greater 
                                                hedged foreign fixed                         below Baa                  than or
                                                income                                                                  equal to)
                                                securities                                                              85%
                --------------------------------------------------------------------------------------------------------------------
                PIMCO Emerging Markets Bond     Emerging market fixed       0-8 yrs          B to Aaa                   (greater
                                                income securities                                                       than or
                                                                                                                        equal to)
                                                                                                                        80%
</TABLE>
            1. As rated by Moody's Investors Service, Inc., or if unrated, de-
            termined by Pacific Investment Management to be of comparable
            quality.
            2. Percentage limitations relate to foreign currency-denominated
            securities for all Underlying Bond Funds except PIMCO Foreign
            Bond, Global Bond and Emerging Markets Bond Funds. Percentage lim-
            itations for these three Funds relate to securities of foreign is-
            suers, denominated in any currency. Each Underlying Bond Fund (ex-
            cept PIMCO Long-Term U.S. Government Fund) may invest beyond these
            limits in U.S. dollar-denominated securities of foreign issuers.
            PIMCO Long-Term U.S. Government Fund may not invest in any securi-
            ties of foreign issuers.
 
12  PIMCO Funds Asset Allocation Series

<PAGE>
 
 
               Each Underlying Bond Fund will normally invest at least 65% of
            its assets in the following types of securities, which, unless
            provided above, may be issued by domestic or foreign entities and
            denominated in U.S. dollars or foreign currencies: securities is-
            sued or guaranteed by the U.S. Government, its agencies or instru-
            mentalities ("U.S. Government securities"); corporate debt securi-
            ties, including convertible securities and corporate commercial
            paper; mortgage-backed and other asset-backed securities; infla-
            tion-indexed bonds issued by both governments and corporations;
            structured notes, including hybrid or "indexed" securities, catas-
            trophe bonds and loan participations; delayed funding loans and
            revolving credit facilities; bank certificates of deposit, fixed
            time deposits and bankers' acceptances; repurchase agreements and
            reverse repurchase agreements; debt securities issued by states or
            local governments and their agencies, authorities and instrumen-
            talities; obligations of foreign governments or their subdivi-
            sions, agencies and instrumentalities; and obligations of interna-
            tional agencies or supranational entities. Fixed income securities
            may have fixed, variable, or floating rates of interest, including
            rates of interest that vary inversely at a multiple of a desig-
            nated or floating rate, or that vary according to changes in rela-
            tive values of currencies. Most of the Underlying Bond Funds may
            (but are not required to) make substantial use of derivative in-
            struments or use a series of purchase and sale contracts or other
            investment techniques to obtain market exposure to the securities
            in which they primarily invest.
 
 
ADDITIONAL
UNDERLYING FUNDS
            In addition to the Funds listed above, a Portfolio may invest in
            additional Underlying Funds, including those that may become
            available for investment in the future, at the discretion of PIMCO
            Advisors and without shareholder approval.
 
 
PRINCIPAL   There can be no assurance that the investment objectives of any of
RISKS OF    the Underlying Funds will be achieved. The following summarizes
THE         principal risks associated with investments in the Underlying
UNDERLYING  Funds. The summary is not intended to be exhaustive. For a more
FUNDS       complete description of these risks, please refer to "Investment
            Objectives and Policies" in the Statement of Additional Informa-
            tion and "Characteristics and Risks of Securities and Investment
            Techniques" in the Underlying Fund Prospectuses, which are incor-
            porated herein by reference and are available free of charge by
            telephoning the Distributor at 1-800-426-0107.
 
            MARKET RISK Most securities in which the Underlying Funds invest
            are subject to some degree of market risk, which is the risk of
            unfavorable market-induced changes in the value of a security. The
            following summarizes general market risks associated with invest-
            ments in fixed income and equity securities.
               Fixed Income Securities Changes in the market values of fixed
            income securities (i.e., capital appreciation or depreciation) are
            largely a function of changes in the current level of interest
            rates. The value of an Underlying Fund's investments in fixed in-
            come securities will typically change as the level of interest
            rates fluctuate. During periods of falling interest rates, the
            value of fixed income securities generally rise. Conversely, dur-
            ing periods of rising interest rates, the value of fixed income
            securities generally decline.
               "Duration" is one measure of the expected life of a fixed in-
            come security. When interest rates are falling, a portfolio with a
            shorter duration will generally not generate as high a level of
            total return as a portfolio with a longer duration. When interest
            rates are rising, a portfolio with a shorter duration will gener-
            ally outperform a longer duration portfolio. When interest rates
            are flat, shorter duration portfolios generally will not generate
            as high a level of total return as longer duration portfolios (as-
            suming that long-term interest rates are higher than short-term
            rates, which is commonly the case). Accordingly, longer duration
            portfolios generally have a greater potential for total return
            than shorter duration portfolios, but are also subject to greater
            levels of market risk and price volatility. Therefore, Underlying
            Bond Funds with longer average portfolio durations (e.g., PIMCO
            Long-Term U.S. Government Fund) are generally subject to higher
            levels of market risk than Funds with shorter durations (e.g.,
            PIMCO Money Market, Short-Term and Low Duration Funds). Also, some
            portfolios (e.g., those with mortgage-backed and other prepayable
            securities) have changing durations and may have increasing dura-
            tions precisely when that is least advantageous (i.e., when inter-
            est rates are rising).
               Certain types of securities in which the Underlying Bond Funds
            may invest are particularly sensitive to fluctuations in
            prevailing interest rates and have relatively high levels of
            market risk. These include various mortgage- related securities
            (for instance, the interest-only or "IO" class of a stripped
            mortgage-backed security) and "zero
 
                                                 November 1, 1998 Prospectus  13
<PAGE>
 
            coupon" securities (fixed income securities, including certain
            U.S. Government securities, that do not make periodic interest
            payments and are purchased at a discount from their value at
            maturity). Please see "Investment Objectives and Policies" in the
            Statement of Additional Information for a description of these and
            other fixed income securities that are particularly sensitive to
            market risk.
               Equity Securities Changes in the market values of equity secu-
            rities (i.e., capital appreciation or depreciation) may depend
            upon a number of factors, including: general economic and market
            conditions, prospects of the security's issuer, changing interest
            rates, real or perceived economic and competitive industry condi-
            tions, and currency exchange rates. Generally, over the long term,
            the total return obtained by a portfolio that invests primarily in
            equity securities has historically been greater than that obtained
            by a portfolio that invests primarily in fixed income securities.
            However, an equity portfolio is generally subject to greater mar-
            ket risk and price volatility than a fixed income portfolio and is
            considered to be a more aggressive investment.
 
            CREDIT RISK OF FIXED INCOME SECURITIES Credit risk associated with
            investments in fixed income securities relates to the ability of
            the issuer to make scheduled payments of principal and interest on
            an obligation. The Underlying Funds that invest in fixed income
            securities are subject to varying degrees of risk that the issuers
            of the securities will have their credit ratings downgraded or
            will default, potentially reducing the Underlying Fund's share
            price and income level. Nearly all fixed income securities are
            subject to some credit risk, whether the issuers of the securities
            are corporations, states and local governments or foreign govern-
            ments. Even certain U.S. Government securities are subject to
            credit risk.
               Credit risk is particularly acute for Underlying Funds which
            invest in so-called "high-yield" securities or "junk" bonds, which
            are fixed income securities rated lower than Baa by Moody's In-
            vestors Service, Inc. ("Moody's") or BBB by Standard & Poor's Rat-
            ings Services ("S&P"), or are determined to be of comparable qual-
            ity to securities so rated. While such securities offer the poten-
            tial for higher investment returns than higher-rated securities,
            they carry a high degree of credit risk and are considered predom-
            inantly speculative with respect to the issuer's continuing abil-
            ity to meet principal and interest payments. High yield securities
            may also be more susceptible to real or perceived adverse economic
            and competitive industry conditions and may be less liquid than
            higher-rated securities. Accordingly, Underlying Funds which in-
            vest a significant portion of their assets in high yield securi-
            ties (e.g., PIMCO High Yield and Emerging Markets Bond Funds) are
            subject to substantial credit risk, while Funds that invest in
            higher quality securities (e.g., PIMCO Money Market and Long-Term
            U.S. Government Funds) are subject to less credit risk.
 
            INVESTMENTS IN COMPANIES WITH SMALL MARKET CAPITALIZATIONS Certain
            Underlying Stock Funds (in particular, PIMCO Micro-Cap Growth,
            Small-Cap Value and Small-Cap Growth Funds) invest in common stock
            of companies with market capitalizations that are small compared
            to other publicly traded companies. Investments in smaller, less
            seasoned companies may present greater opportunities for growth
            and capital appreciation, but also involve greater risks than cus-
            tomarily are associated with larger, more established companies.
            These companies may have limited product lines, markets or finan-
            cial resources, or they may be dependent upon a limited management
            group. In addition, their securities may be traded in the over-
            the-counter market or on a regional exchange, or may otherwise
            have limited liquidity.
 
            FOREIGN SECURITIES AND CURRENCIES Many Underlying Funds (in par-
            ticular, PIMCO International, International Growth, Structured
            Emerging Markets, Tax-Efficient Structured Emerging Markets,
            Global Bond, Foreign Bond and Emerging Markets Bond Funds) invest
            in securities of foreign issuers, securities traded principally in
            securities markets outside the United States and/or securities de-
            nominated in foreign currencies (together, "foreign securities").
               Investing in foreign securities involves special risks not typ-
            ically associated with investing in U.S. securities. These risks
            include: differences in accounting, auditing and financial report-
            ing standards; generally higher commission rates on foreign port-
            folio transactions; higher custodial costs; the possibility that
            foreign taxes will be charged on dividends and interest payable on
            foreign securities; the possibility of nationalization, expropria-
            tion or confiscatory
 
14  PIMCO Funds Asset Allocation Series

<PAGE>
 
            taxation; adverse changes in investment or exchange control regu-
            lations (which may include suspension of the ability to transfer
            currency from a country); political instability; the possibility
            of unfavorable foreign economic factors; and greater price vola-
            tility.
               Certain Underlying Funds (in particular, PIMCO Structured
            Emerging Markets, Tax-Efficient Structured Emerging Markets and
            Emerging Markets Bond Funds) may invest in the securities of is-
            suers based in countries with developing or "emerging market"
            economies. These securities may present market, credit, currency,
            liquidity, legal, political and other risks greater than, or in
            addition to, risks of investing in developed foreign countries.
            These risks include: high currency exchange rate fluctuations;
            greater social, economic and political uncertainty and instability
            (including the risk of war); more substantial governmental in-
            volvement in the economy; less governmental supervision and regu-
            lation of the securities markets and participants in those mar-
            kets; unavailability of currency hedging techniques in certain
            emerging market countries; the fact that companies in emerging
            market countries may be newly organized and may be smaller and
            less seasoned companies; the difference in, or lack of, auditing
            and financial reporting standards, which may result in unavaila-
            bility of material information about issuers; different clearance
            and settlement procedures, which may be unable to keep pace with
            the volume of securities transactions or otherwise make it diffi-
            cult to engage in such transactions; the risk that it may be more
            difficult to obtain and/or enforce legal judgments in foreign ju-
            risdictions; and significantly smaller market capitalizations of
            emerging market issuers.
               Underlying Funds that invest in fixed income securities denomi-
            nated in foreign currencies or in foreign currencies and related
            derivative instruments (in particular, PIMCO Global Bond, Foreign
            Bond and Emerging Markets Bond Funds) and Underlying Funds that
            invest in equity securities traded principally in foreign curren-
            cies, may be adversely affected by changes in foreign currency ex-
            change rates. Those rates may fluctuate significantly over short
            periods of time for a number of reasons, including the forces of
            supply and demand in the foreign exchange markets, actual or per-
            ceived changes in interest rates, and intervention (or the failure
            to intervene) by U.S. or foreign governments or central banks, or
            by currency controls or political developments in the U.S. or
            abroad. For example, significant uncertainty surrounds the pro-
            posed introduction of the euro (a common currency unit for the Eu-
            ropean Union) in January 1999 and its effect on the value of secu-
            rities denominated in local European currencies. For a more com-
            plete discussion of foreign currency risks (including those asso-
            ciated with the euro), please see "Investment Objectives and Poli-
            cies--Foreign Currencies" in the Statement of Additional Informa-
            tion.
 
            DERIVATIVE INSTRUMENTS The Underlying Funds (with the exception of
            PIMCO Money Market Fund) may (but are not required to) utilize a
            number of derivative instruments for risk management purposes or
            as part of their investment strategies. These include futures con-
            tracts, options contracts, options on futures contracts, forward
            contracts and swap agreements. Generally, derivatives are finan-
            cial contracts whose value depends upon, or is derived from, the
            value of an underlying asset, reference rate or index, and may re-
            late to stocks, bonds, interest rates, currencies or currency ex-
            change rates, commodities, and related indexes. For a description
            of the various derivative instruments that may be utilized by the
            Underlying Funds, please see "Investment Objectives and Policies"
            in the Statement of Additional Information.
               The use of derivatives instruments involves risks different
            from, or greater than, the risks associated with investing di-
            rectly in securities and other more traditional investments. The
            following provides a general discussion of important risk factors
            relating to the use of derivative instruments by the Underlying
            Funds.
               Management Risk Derivative products are highly specialized in-
            struments that require investment techniques and risk analyses
            different from those associated with stocks and bonds. The use of
            a derivative requires an understanding not only of the underlying
            instrument but also of the derivative itself, without the benefit
            of observing the performance of the derivative under all possible
            market conditions.
               Credit Risk The use of a derivative involves the risk that a
            loss may be sustained as a result of the failure of another party
            to the contract (usually referred to as a "counterparty") to make
            required payments or otherwise comply with the contract's terms.
               Liquidity Risk Liquidity risk exists when a particular deriva-
            tive instrument is difficult to purchase or sell. If a derivative
            transaction is particularly large or if the relevant market is il-
            liquid (as is the case with many privately
 
                                                 November 1, 1998 Prospectus  15
<PAGE>
 
            negotiated derivatives), it may not be possible to initiate a
            transaction or liquidate a position at an advantageous time or
            price.
               Leverage Risk Because many derivatives have a leverage compo-
            nent, adverse changes in the value or level of the underlying as-
            set, reference rate or index can result in a loss substantially
            greater than the amount invested in the derivative itself. Certain
            derivatives have the potential for unlimited loss, regardless of
            the size of the initial investment. When an Underlying Fund uses
            derivatives for leverage, investments in that Fund will tend to be
            more volatile, resulting in larger gains or losses in response to
            market changes.
               Market and Other Risks Like most other investments, derivative
            instruments are subject to the general risk that the market value
            of the instrument will change in a way detrimental to the invest-
            or's interest. Other risks in using derivatives include the risk
            of mispricing or improper valuation of derivatives and the inabil-
            ity of derivatives to correlate perfectly with underlying assets,
            rates and indexes. Many derivatives, in particular privately nego-
            tiated derivatives, are complex and often valued subjectively. Im-
            proper valuations can result in increased cash payment require-
            ments to counterparties or a loss of value to an Underlying Fund.
            Also, the value of derivatives may not correlate perfectly, or at
            all, with the value of the assets, reference rates or indices they
            are designed to closely track. Consequently, an Underlying Fund's
            use of derivatives may not always be an effective means of, and
            sometimes could be counterproductive to, furthering the Fund's in-
            vestment objective or risk management strategy. In addition, suit-
            able derivative transactions may not be available in all circum-
            stances and there can be no assurance that an Underlying Fund will
            engage in such transactions at any given time or from time to
            time.
 
            A NOTE ON PIMCO STOCKSPLUS FUND While the objective of PIMCO
            StocksPLUS Fund is to achieve a total return which exceeds the to-
            tal return performance of the S&P 500, it does so by investing
            substantially all of its assets in a combination of equity-based
            derivative instruments and a portfolio of fixed income securities.
            Consequently, the risks of investing in the Fund include the risks
            of derivatives and the risks generally associated with the Under-
            lying Bond Funds. To the extent that the Fund invests in S&P 500
            derivatives backed by a portfolio of fixed income securities, un-
            der certain conditions, generally in a market where the value of
            both S&P 500 derivatives and fixed income securities are declin-
            ing, the Fund may experience greater losses than would be the case
            if it were to invest directly in a portfolio of S&P 500 stocks.
 
            CERTAIN OTHER MISCELLANEOUS INVESTMENT PRACTICES In addition to
            investing in the securities listed above under "Primary Invest-
            ments," some or all of the Underlying Funds may to varying
            extents: lend portfolio securities; enter into repurchase agree-
            ments and reverse repurchase agreements; purchase and sell securi-
            ties on a when-issued or delayed delivery basis; enter into for-
            ward commitments to purchase securities; purchase and write call
            and put options on securities and securities indexes; enter into
            futures contracts, options on futures contracts and swap agree-
            ments; invest in foreign securities; and buy or sell foreign cur-
            rencies and enter into forward foreign currency contracts. These
            and the other types of securities and investment techniques used
            by the Underlying Funds all have attendant risks. The Portfolios
            are indirectly subject to some or all of these risks to varying
            degrees because they invest all of their assets in the Underlying
            Funds. For further information concerning the investment practices
            of and risks associated with the Underlying Funds, please see "In-
            vestment Objectives and Policies" in the Statement of Additional
            Information and the Underlying Fund Prospectuses, which are incor-
            porated herein by reference and are available free of charge by
            telephoning the Distributor at 1-800-426-0107.
 
            Performance Information
 
            From time to time the Trust may make available certain information
            about the performance of the Class A, Class B and Class C shares
            of some or all of the Portfolios. Information about a Portfolio's
            performance is based on that Portfolio's record to a recent date
            and is not intended to indicate future performance. Performance
            information is computed separately for each Portfolio's Class A,
            Class B and Class C shares in accordance with the formulas de-
            scribed below. Because Class B and Class C shares bear the expense
            of the distribution fee attending the deferred sales
 
16  PIMCO Funds Asset Allocation Series

<PAGE>
 
            charge (Class B) and asset based sales charge (Class C) alterna-
            tives and certain other expenses, it is expected that, under nor-
            mal circumstances, the level of performance of a Portfolio's Class
            B and Class C shares will be lower than that of the Portfolio's
            Class A shares, although an investment in Class B or Class C
            shares is not reduced by the front-end sales charge generally ap-
            plicable to an investment in Class A shares.
               The total return of Class A, Class B and/or Class C shares of
            all Portfolios may be included in advertisements or other written
            material. When a Portfolio's total return is advertised with re-
            spect to its Class A, Class B and/or Class C shares, it will be
            calculated for the past year, the past five years, and the past
            ten years (or if the Portfolio has been offered for a period
            shorter than one, five or ten years, that period will be substi-
            tuted) since the establishment of the Portfolio, as more fully de-
            scribed in the Statement of Additional Information. Total return
            for each class is measured by comparing the value of an investment
            in the Portfolio at the beginning of the relevant period (in the
            case of Class A shares, giving effect to the maximum initial sales
            charge) to the redemption value of the investment in the Portfolio
            at the end of the period (assuming immediate reinvestment of any
            dividends or capital gains distributions at net asset value and
            giving effect to the deduction of the maximum CDSC which would be
            payable). Total return may be advertised using alternative methods
            that reflect all elements of return.
               Quotations of yield for a Portfolio or class will be based on
            the investment income per share (as defined by the Securities and
            Exchange Commission) during a particular 30-day (or one-month) pe-
            riod (including dividends and interest), less expenses accrued
            during the period ("net investment income"), and will be computed
            by dividing net investment income by the maximum public offering
            price per share on the last day of the period.
               The Portfolios may also provide current distribution informa-
            tion to their shareholders in shareholder reports or other share-
            holder communications, or in certain types of sales literature
            provided to prospective investors. Current distribution informa-
            tion for a particular class of a Portfolio will be based on dis-
            tributions for a specified period (i.e., total dividends from net
            investment income), divided by the relevant class net asset value
            per share on the last day of the period and annualized. Current
            distribution rates differ from standardized yield rates in that
            they represent what a class of a Portfolio has declared and paid
            to shareholders as of the end of a specified period rather than
            the Portfolio's actual net investment income for that period.
               The Adviser may also report to shareholders or to the public in
            advertisements concerning its performance as adviser to clients
            other than the Portfolios, and on its comparative performance or
            standing in relation to other money managers. Such comparative in-
            formation may be compiled or provided by independent ratings serv-
            ices or by news organizations. Any performance information,
            whether related to the Portfolios, the Adviser or an advisory af-
            filiate of the Adviser, should be considered in light of the Port-
            folios' investment objectives and policies, characteristics and
            quality of the Portfolios' investments, and the market conditions
            during the time period indicated, and should not be considered to
            be representative of what may be achieved by the Portfolios in the
            future.
               Investment results of the Portfolios will fluctuate over time,
            and any representation of the Portfolios' total return or yield
            for any prior period should not be considered as a representation
            of what an investor's total return or yield may be in any future
            period.
 
            How to Buy Shares
 
            Class A, Class B and Class C shares of each Portfolio are continu-
            ously offered through the Trust's principal underwriter, PIMCO
            Funds Distributors LLC (the "Distributor"), and through other
            firms which have dealer agreements with the Distributor ("partici-
            pating brokers") or which have agreed to act as introducing bro-
            kers for the Distributor ("introducing brokers").
               There are two ways to purchase Class A, Class B or Class C
            shares: either 1) through your dealer or broker which has a dealer
            agreement with the Distributor; or 2) directly by mailing a PIMCO
            Funds account application (an "account application") with payment,
            as described below under the heading Direct Investment, to the
            Distributor (if no dealer is named in the account application, the
            Distributor may act as dealer).
 
                                                November 1, 1998 Prospectus  17 
<PAGE>
 
               Each Portfolio currently offers and sells three classes of
            shares in this Prospectus (Class A, Class B and Class C). Shares
            may be purchased at a price equal to their net asset value per
            share next determined after receipt of an order, plus a sales
            charge which, at the election of the purchaser, may be imposed ei-
            ther (i) at the time of the purchase in the case of Class A shares
            (the "initial sales charge alternative"), (ii) on a contingent de-
            ferred basis in the case of Class B shares (the "deferred sales
            charge alternative"), or (iii) by the deduction of an ongoing as-
            set based sales charge in the case of Class C shares (the "asset
            based sales charge alternative"). In certain circumstances, Class
            A and Class C shares are also subject to a CDSC. See "Alternative
            Purchase Arrangements." Purchase payments for Class B and Class C
            shares are fully invested at the net asset value next determined
            after acceptance of the trade. Purchase payments for Class A
            shares, less the applicable sales charge, are invested at the net
            asset value next determined after acceptance of the trade.
               All purchase orders received by the Distributor prior to the
            close of regular trading (normally 4:00 p.m., Eastern time) on the
            New York Stock Exchange (the "Exchange"), on a regular business
            day, are processed at that day's offering price. However, orders
            received by the Distributor from dealers or brokers after the of-
            fering price is determined that day will receive such offering
            price if the orders were received by the dealer or broker from its
            customer prior to such determination and were transmitted to and
            received by the Distributor prior to its close of business that
            day (normally 5:00 p.m., Eastern time) or, in the case of certain
            retirement plans, received by the Distributor prior to 9:30 a.m.,
            Eastern time on the next business day. Purchase orders received on
            other than a regular business day will be executed on the next
            succeeding regular business day. The Distributor, in its sole dis-
            cretion, may accept or reject any order for purchase of Portfolio
            shares. The sale of shares will be suspended during any period in
            which the Exchange is closed for other than weekends or holidays,
            or if permitted by the rules of the Securities and Exchange Com-
            mission, when trading on the Exchange is restricted or during an
            emergency which makes it impracticable for the Portfolios to dis-
            pose of their securities or to determine fairly the value of their
            net assets, or during any other period as permitted by the Securi-
            ties and Exchange Commission for the protection of investors.
               Except for purchases through the PIMCO Funds Auto-Invest plan,
            the PIMCO Funds Auto-Exchange plan, investments pursuant to the
            Uniform Gifts to Minors Act, and tax-qualified and wrap programs
            referred to below under "Tax-Qualified Retirement Plans" and
            "Sales at Net Asset Value," the minimum initial investment in
            Class A, Class B or Class C shares of any Portfolio or other se-
            ries of the Trust or any series of PIMCO Funds: Pacific Investment
            Management Series is $2,500, and the minimum additional investment
            is $100 per Portfolio. For information about dealer commissions,
            see "Alternative Purchase Arrangements" below. Persons selling
            Portfolio shares may receive different compensation for selling
            Class A, Class B or Class C shares. Normally, Portfolio shares
            purchased through participating brokers are held in the investor's
            account with that broker. No share certificates will be issued un-
            less specifically requested in writing by an investor or broker-
            dealer.
 
 
DIRECT      Investors who wish to invest in Class A, Class B or Class C shares
INVESTMENT  of the Portfolios directly, rather than through a participating
            broker, may do so by opening an account with the Distributor. To
            open an account, an investor should complete the account applica-
            tion. All shareholders who open direct accounts with the Distribu-
            tor will receive from the Distributor individual confirmations of
            each purchase, redemption, dividend reinvestment, exchange or
            transfer of Trust shares, including the total number of Trust
            shares owned as of the confirmation date, except that purchases
            which result from the reinvestment of daily-accrued dividends
            and/or distributions will be confirmed once each calendar quarter.
            See "Distributions" below. Information regarding direct investment
            or any other features or plans offered by the Trust may be ob-
            tained by calling the Distributor at 1-800-426-0107 or by calling
            your broker.
 
 
PURCHASE BY
MAIL        Investors who wish to invest directly may send a check payable to
            PIMCO Funds Distributors LLC, along with a completed application
            form to:
 
               PIMCO Funds Distributors LLC
               P.O. Box 5866
               Denver, CO 80217-5866
 
18  PIMCO Funds Asset Allocation Series

<PAGE>
 
 
               Purchases are accepted subject to collection of checks at full
            value and conversion into federal funds. Payment by a check drawn
            on any member of the Federal Reserve System can normally be con-
            verted into federal funds within two business days after receipt
            of the check. Checks drawn on a non-member bank may take up to 15
            days to convert into federal funds. In all cases, the purchase
            price is based on the net asset value next determined after the
            purchase order and check are accepted, even though the check may
            not yet have been converted into federal funds.
 
 
SUBSEQUENT  Subsequent purchases of Class A, Class B or Class C shares can be
PURCHASES   made as indicated above by mailing a check with a letter describ-
OF          ing the investment or with the additional investment portion of a
SHARES      confirmation statement. Except for subsequent purchases through
            the PIMCO Funds Auto-Invest plan, the PIMCO Funds Auto-Exchange
            plan, tax-qualified programs and PIMCO Funds Fund Link referred to
            below, and except during periods when an Automatic Withdrawal Plan
            is in effect, the minimum subsequent purchase is $100 in any Port-
            folio. All payments should be made payable to PIMCO Funds Distrib-
            utors LLC and should clearly indicate the shareholder's account
            number. Checks should be mailed to the address above under "Pur-
            chase by Mail."
 
 
TAX-        The Distributor makes available retirement plan services and docu-
QUALIFIED   ments for Individual Retirement Accounts (IRAs), including Roth
RETIREMENT  IRAs, for which First National Bank of Boston (see "Change in
PLANS       Transfer Agent" below) serves as trustee and for IRA Accounts es-
            tablished with Form 5305-SIMPLE under the Internal Revenue Code of
            1986, as amended (the "Code"). These accounts include Simplified
            Employee Pension Plan (SEP) and Salary Reduction Simplified Em-
            ployee Pension Plan (SAR/SEP) IRA accounts and prototype docu-
            ments. In addition, prototype documents are available for estab-
            lishing 403(b)(7) custodial accounts with First National Bank of
            Boston as custodian. This type of plan is available to employees
            of certain non-profit organizations.
               The Distributor also makes available prototype documents for
            establishing Money Purchase and/or Profit Sharing plans and 401(k)
            Retirement Savings Plans. These prototype plans require certain
            minimum per participant account sizes and certain minimum aggre-
            gate investments in the Trust, but are not subject to the small
            account fees described below that will apply to other plans. In-
            vestors should call the Distributor at 1-800-426-0107 for further
            information about these plans and should consult with their own
            tax advisers before establishing any retirement plan. Investors
            who maintain their accounts with participating brokers should con-
            sult their broker about similar types of accounts that may be of-
            fered through the broker. The minimum initial investment for all
            tax-qualified plans (except for employer-sponsored plans, SIMPLE
            IRAs, SEPs and SAR/SEPs) is $1,000 per Portfolio and the minimum
            subsequent investment is $100. The minimum initial investment for
            employer-sponsored plans, SIMPLE IRAs, SEPs and SAR/SEPs and the
            minimum subsequent investment per Portfolio for all such plans is
            $50.
 
 
PIMCO FUNDS The PIMCO Funds Auto-Invest plan provides for periodic investments
AUTO-INVEST into the shareholder's account with the Trust by means of auto-
            matic transfers of a designated amount from the shareholder's bank
            account. The minimum investment for eligibility in the PIMCO Funds
            Auto-Invest plan is $1,000 per Portfolio. Investments may be made
            monthly or quarterly, and may be in any amount subject to a mini-
            mum of $50 per month for each Portfolio in which shares are pur-
            chased through the plan. Further information regarding the PIMCO
            Funds Auto-Invest plan is available from the Distributor or par-
            ticipating brokers. You may enroll by completing the appropriate
            section on the account application, or you may obtain an Auto-In-
            vest application by calling the Distributor or your broker.
 
 
PIMCO FUNDS
AUTO-EXCHANGE
            The PIMCO Funds Auto-Exchange plan establishes regular, periodic
            exchanges from one Portfolio to another Portfolio or other series
            of the Trust or PIMCO Funds: Pacific Investment Management Series
            which offers Class A, Class B or Class C shares. The plan provides
            for regular investments into a shareholder's account in a specific
            Portfolio by means of automatic exchanges of a designated amount
            from an account for another Portfolio or other series of the same
            class of shares and with identical account registration.
               Exchanges may be made monthly or quarterly, and may be in any
            amount subject to a minimum of $1,000 to open a new Portfolio ac-
            count and of $50 for any existing Portfolio account for which
            shares are purchased through the
 
                                                 November 1, 1998 Prospectus  19
<PAGE>
 
            plan. Further information regarding the PIMCO Funds Auto-Exchange
            plan is available from the Distributor at 1-800-426-0107 or par-
            ticipating brokers. You may enroll by completing an application
            which may be obtained from the Distributor or by telephone request
            at 1-800-426-0107. For more information on exchanges, see "Ex-
            change Privilege."
 
 
PIMCO FUNDS PIMCO Funds Fund Link ("Fund Link") connects your Portfolio ac-
FUND LINK   count with a bank account. Fund Link may be used for subsequent
            purchases and for redemptions and other transactions described un-
            der "How to Redeem." Purchase transactions are effected by elec-
            tronic funds transfers from the shareholder's account at a U.S.
            bank or other financial institution that is an Automated Clearing
            House ("ACH") member. Investors may use Fund Link to make subse-
            quent purchases of shares in amounts from $50 to $10,000. To ini-
            tiate such purchases, call 1-800-426-0107. All such calls will be
            recorded. Fund Link is normally established within 45 days of re-
            ceipt of a Fund Link application by Shareholder Services, Inc.
            (the "Transfer Agent"). The minimum investment by Fund Link is $50
            per Portfolio. Shares will be purchased on the regular business
            day the Distributor receives the funds through the ACH system,
            provided the funds are received before the close of regular trad-
            ing on the Exchange. If the funds are received after the close of
            regular trading, the shares will be purchased on the next regular
            business day.
               Fund Link privileges must be requested on the account applica-
            tion. To establish Fund Link on an existing account, complete a
            Fund Link application, which is available from the Distributor or
            your broker, with signatures guaranteed from all shareholders of
            record for the account. See "Signature Guarantee" below. Such
            privileges apply to each shareholder of record for the account un-
            less and until the Distributor receives written instructions from
            a shareholder of record canceling such privileges. Changes of bank
            account information must be made by completing a new Fund Link ap-
            plication signed by all owners of record of the account, with all
            signatures guaranteed. The Distributor, the Transfer Agent and the
            Trust may rely on any telephone instructions believed to be genu-
            ine and will not be responsible to shareholders for any damage,
            loss or expenses arising out of such instructions. The Trust re-
            serves the right to amend, suspend or discontinue Fund Link privi-
            leges at any time without prior notice. Fund Link does not apply
            to shares held in broker "street name" accounts.
 
 
SIGNATURE   When a signature guarantee is called for, the shareholder should
GUARANTEE   have "Signature Guaranteed" stamped under his signature and guar-
            anteed by any of the following entities: U.S. banks, foreign banks
            having a U.S. correspondent bank, credit unions, savings associa-
            tions, U.S. registered dealers and brokers, municipal securities
            dealers and brokers, government securities dealers and brokers,
            national securities exchanges, registered securities associations
            and clearing agencies (each an "Eligible Guarantor Institution").
            The Distributor reserves the right to reject any signature guaran-
            tee pursuant to its written signature guarantee standards or pro-
            cedures, which may be revised in the future to permit it to reject
            signature guarantees from Eligible Guarantor Institutions that do
            not, based on credit guidelines, satisfy such written standards or
            procedures. The Trust may change the signature guarantee require-
            ments from time to time upon notice to shareholders, which may be
            given by means of a new or supplemented Prospectus.
 
 
ACCOUNT     Changes in registration or account privileges may be made in writ-
REGISTRATIONing to the Transfer Agent. Signature guarantees may be required.
CHANGES     See "Signature Guarantee" above. All correspondence must include
            the account number and must be sent to:
 
               PIMCO Funds Distributors LLC
               P.O. Box 5866
               Denver, CO 80217-5866
 
 
SMALL
ACCOUNT     Because of the disproportionately high costs of servicing accounts
FEE         with low balances, a fee at an annual rate of $16, paid to PIMCO
            Advisors, the Portfolios' administrator, will automatically be de-
            ducted from direct accounts with balances falling below a minimum
            level. The valuation of accounts and the deduction are expected to
            take place during the last five business days of each calendar
            quarter. The fee will be deducted in quarterly installments from
 
20  PIMCO Funds Asset Allocation Series

<PAGE>
 
            accounts with balances below $2,500 except for Uniform Gift to Mi-
            nors, IRA, Roth IRA and Auto-Invest accounts, for which the limit
            is $1,000. Effective April 1, 1999, except for prototype plans de-
            scribed above, the fee will apply to employer-sponsored retirement
            plan accounts, Money Purchase and/or Profit Sharing plans, 401(k)
            plans, 403(b)(7) custodial accounts, SIMPLE IRAs, SEPs and
            SAR/SEPs. (A separate custodial fee may apply to IRAs, Roth IRAs
            and other retirement accounts.) No fee will be charged on any ac-
            count of a shareholder if the aggregate value of all of the share-
            holder's accounts is at least $50,000. No small account fee will
            be charged to employee and employee-related accounts of PIMCO Ad-
            visors and/or its affiliates.
 
 
MINIMUM     Due to the relatively high cost to the Portfolios of maintaining
ACCOUNT     small accounts, you are asked to maintain an account balance of at
SIZE        least the amount necessary to open the type of account involved.
            If your balance is below such minimum for three months or longer,
            the Portfolios' administrator shall have the right (except in the
            case of employer-sponsored retirement accounts) to close your ac-
            count after giving you 60 days in which to increase your balance.
            Your account will not be liquidated if the reduction in size is
            due solely to market decline in the value of your Portfolio shares
            or if the aggregate value of all your accounts in PIMCO Funds ex-
            ceeds $50,000.
 
CHANGE IN   The Trust expects to change its transfer agent for its Class A, B
TRANSFER    and C shares to First Data Investor Services Group, Inc. Share-
AGENT       holders will continue to receive all of the services described in
            this Prospectus and should continue to follow the various proce-
            dures set forth in this Prospectus, with the exception of the ad-
            dress changes described below.
               There will be no changes in the toll-free 1-800 telephone num-
            bers set forth in this Prospectus. However, mailing addresses will
            change as follows:
 
<TABLE>
<CAPTION>
          Old Address                           New Address
          -----------                           -----------
          <S>                                   <C>        
          Shareholder Services, Inc.            First Data Investor Services Group, Inc.
          P.O. Box 5866                         P.O. Box 9688                              
          Denver, CO 80217                      Providence, RI 02940-0926                  
                                                                                           
          PIMCO Funds Distributors LLC          PIMCO Funds Distributors LLC                           
          P.O. Box 5866                         P.O. Box 9688                              
          Denver, CO 80217-5866                 Providence, RI 02940-0926                  
</TABLE>
 
               Also, at the time of the change of Transfer Agent, the
            custodian/trustee for the PIMCO Funds prototype retirement plans,
            403(b) custodial accounts, IRAs, Roth IRAs, SIMPLE IRAs, SEPs and
            SAR/SEPs will be changed from First National Bank of Boston to
            Boston Safe Deposit & Trust Company.
 
            Alternative Purchase Arrangements
 
            The Trust offers investors three classes of shares in this Pro-
            spectus (Class A, Class B and Class C) which bear sales charges in
            different forms and amounts and which bear different levels of ex-
            penses. The alternative purchase arrangements offered in this Pro-
            spectus are designed to enable a retail investor to choose the
            method of purchasing Portfolio shares that is most beneficial to
            the investor based on all factors to be considered, which include:
            the amount and intended length of the investment; the particular
            Portfolio; and whether the investor intends to exchange shares for
            shares of other PIMCO Funds. Generally, when making an investment
            decision, investors should consider the anticipated life of an in-
            tended investment in the Portfolios, the accumulated distribution
            and servicing fees plus CDSCs on Class B or Class C shares, the
            initial sales charge plus accumulated servicing fees on Class A
            shares (plus a CDSC in certain circumstances), the possibility
            that the anticipated higher return on Class A shares due to the
            lower ongoing charges will offset the initial sales charge paid on
            such shares, the automatic conversion of Class B shares to Class A
            shares and the difference in the CDSCs applicable to Class A,
            Class B and Class C shares.
 
            CLASS A The initial sales charge alternative (Class A) might be
            preferred by investors purchasing shares of sufficient aggregate
            value to qualify for reductions in the initial sales charge appli-
            cable to such shares. Similar reductions are not
 
                                                 November 1, 1998 Prospectus  21
<PAGE>
 
            available on the contingent deferred sales charge alternative
            (Class B) or the asset based sales charge alternative (Class C).
            Class A shares are subject to a servicing fee but are not subject
            to a distribution fee and, accordingly, such shares are expected
            to pay correspondingly higher dividends on a per share basis. How-
            ever, because initial sales charges are deducted at the time of
            purchase, not all of the purchase payment for Class A shares is
            invested initially. Class B and Class C shares might be preferable
            to investors who wish to have all purchase payments invested ini-
            tially, although remaining subject to higher distribution and ser-
            vicing fees and, for certain periods, being subject to a CDSC. An
            investor who qualifies for an elimination of the Class A initial
            sales charge should also consider whether he or she anticipates
            redeeming shares in a time period which will subject such shares
            to a CDSC as described below. See "Initial Sales Charge Alterna-
            tive--Class A Shares--Class A Deferred Sales Charge" below.
 
            CLASS B Class B shares might be preferred by investors who intend
            to invest in the Portfolios for longer periods and who do not in-
            tend to purchase shares of sufficient aggregate value to qualify
            for sales charge reductions applicable to Class A shares. Both
            Class B and Class C shares can be purchased at net asset value
            without an initial sales charge. However, unlike Class C shares,
            Class B shares convert into Class A shares after the shares have
            been held for seven years. After the conversion takes place, the
            shares will no longer be subject to a CDSC, and will be subject to
            the servicing fees charged for Class A shares which are lower than
            the distribution and servicing fees charged on either Class B or
            Class C shares. See "Deferred Sales Charge Alternative--Class B
            Shares" below. Class B shares are not available for purchase by
            employer sponsored retirement plans.
 
            CLASS C Class C shares might be preferred by investors who intend
            to purchase shares which are not of sufficient aggregate value to
            qualify for Class A sales charges of 1% or less and who wish to
            have all purchase payments invested initially. Class C shares are
            preferable to Class B shares for investors who intend to maintain
            their investment for intermediate periods and therefore may also
            be preferable for investors who are unsure of the intended length
            of their investment. Unlike Class B shares, Class C shares are not
            subject to a CDSC after they have been held for one year and are
            subject to only a 1% CDSC during the first year. However, because
            Class C shares do not convert into Class A shares, Class B shares
            are preferable to Class C shares for investors who intend to main-
            tain their investment in the Portfolios for long periods. See "As-
            set Based Sales Charge Alternative--Class C Shares" below.
               In determining which class of shares to purchase, an investor
            should always consider whether any waiver or reduction of a sales
            charge or a CDSC is available. See generally "Initial Sales Charge
            Alternative--Class A Shares" and "Waiver of Contingent Deferred
            Sales Charges" below.
               The maximum single purchase of Class B shares of the Portfolios
            and other series of the Trust and PIMCO Funds: Pacific Investment
            Management Series accepted is $249,999. The maximum single pur-
            chase of Class C shares of the Portfolios and other series of the
            Trust and PIMCO Funds: Pacific Investment Management Series ac-
            cepted is $999,999. The Portfolios may refuse any order to pur-
            chase shares.
               For a description of the Distribution and Servicing Plans and
            distribution and servicing fees payable thereunder with respect to
            Class A, Class B and Class C shares, see "Distributor and Distri-
            bution and Servicing Plans" below.
 
            WAIVER OF CONTINGENT DEFERRED SALES CHARGES The CDSC applicable to
            Class A and Class C shares is currently waived for (i) any partial
            or complete redemption in connection with (a) required minimum
            distributions to IRA account owners or beneficiaries who are age
            70 1/2 or older or (b) distributions to participants in employer-
            sponsored retirement plans upon attaining age 59 1/2 or on account
            of death or disability;* (ii) any partial or complete redemption
            in connection with a qualifying loan or hardship withdrawal from
            an employer sponsored retirement plan; (iii) any
            ------
            * This subsection (i) shall read as follows until December 31,
              1998: "(i) any partial or complete redemption in connection with
              any of the following distributions from a retirement plan,
              including a 403(b)(7) custodial account or an IRA (with the
              exception of a Roth IRA), that qualify for exemption from the
              additional tax on early distributions under Section 72(t) of the
              Code: (a) upon attaining age 59 1/2, (b) on account of death or
              disability, (c) as part of a series of substantially equal
              periodic payments, (d) in the case of an IRA (with the exception
              of a Roth IRA), attributable to qualified higher education
              expenses or to qualified first-time home-buyer expenses or (e)
              in the case of a retirement plan other than an IRA, upon
              separation from service after attaining age 55;"
 
22  PIMCO Funds Asset Allocation Series

<PAGE>
 
            complete redemption in connection with a distribution from a qual-
            ified employer retirement plan in connection with termination of
            employment or termination of the employer's plan and the transfer
            to another employer's plan or to an IRA (with the exception of a
            Roth IRA); (iv) any partial or complete redemption following death
            or disability (as defined in the Code) of a shareholder (including
            one who owns the shares as joint tenant with his or her spouse)
            from an account in which the deceased or disabled is named, pro-
            vided the redemption is requested within one year of the death or
            initial determination of disability; (v) any redemption resulting
            from a return of an excess contribution to a qualified employer
            retirement plan or an IRA (with the exception of a Roth IRA); (vi)
            up to 10% per year of the value of an account which (a) has the
            value of at least $10,000 at the start of such year and (b) is
            subject to an Automatic Withdrawal Plan; (vii) redemptions by
            Trustees, officers and employees of the Trust, and by directors,
            officers and employees of the Distributor and the Adviser; (viii)
            redemptions effected pursuant to a Portfolio's right to involun-
            tarily redeem a shareholder's account if the aggregate net asset
            value of shares held in such shareholder's account is less than a
            minimum account size specified in such Portfolio's prospectus;
            (ix) involuntary redemptions caused by operation of law; (x) re-
            demption of shares of any Portfolio that is combined with another
            Portfolio or other series of the Trust or another investment com-
            pany, or a personal holding company by virtue of a merger, acqui-
            sition or other similar reorganization transaction; (xi) redemp-
            tions by a shareholder who is a participant making periodic pur-
            chases of not less than $50 through certain employer sponsored
            savings plans that are clients of a broker-dealer with which the
            Distributor has an agreement with respect to such purchases; (xii)
            redemptions effected by trustees or other fiduciaries who have
            purchased shares for employer sponsored plans, the trustee, admin-
            istrator, fiduciary, broker, trust company or registered invest-
            ment adviser for which has an agreement with the Distributor with
            respect to such purchases; or (xiii) redemptions in connection
            with IRA accounts established with Form 5305-SIMPLE under the Code
            for which the Trust is the designated financial institution.
               The CDSC applicable to Class B shares is currently waived for
            any partial or complete redemption in each of the following cases:
            (a) in connection with required minimum distributions to IRA ac-
            count owners or to plan participants or beneficiaries who are age
            70 1/2 or older; (b) following death or disability (as defined in
            the Code) of a shareholder (including one who owns the shares as
            joint tenant with his or her spouse) from an account in which the
            deceased or disabled is named, provided the redemption is re-
            quested within one year of the death or initial determination of
            disability; and (c) up to 10% per year of the value of an account
            which (i) has a value of at least $100,000 at the start of such
            year and (ii) is subject to an Automatic Withdrawal Plan. See "How
            to Redeem--Automatic Withdrawal Plan."
               The Distributor may require documentation prior to waiver of
            the CDSC for any class, including distribution letters, certifica-
            tion by plan administrators, applicable tax forms, death certifi-
            cates, physicians' certificates, etc.
 
                                                 November 1, 1998 Prospectus  23
<PAGE>
 
INITIAL
SALES
CHARGE
ALTERNATIVE --
CLASS A SHARES
            Class A shares are sold at a public offering price equal to their
            net asset value per share plus a sales charge, as set forth below.
            As indicated below under "Class A Deferred Sales Charge," certain
            investors that purchase $1,000,000 or more of any Portfolio's
            Class A shares (and thus pay no initial sales charge) may be sub-
            ject to a 1% CDSC if they redeem such shares during the first 18
            months after their purchase.
 
 
              90/10 PORTFOLIO AND 60/40 PORTFOLIO
<TABLE>
<CAPTION>
                                                               DISCOUNT OR
                                SALES CHARGE AS SALES CHARGE   COMMISSION TO
           AMOUNT OF            % OF NET        AS % OF PUBLIC DEALERS AS % OF
           PURCHASE             AMOUNT INVESTED OFFERING PRICE PUBLIC OFFERING PRICE
           -------------------------------------------------------------------------
           <S>                  <C>             <C>            <C>
           $0 - $49,999         5.82%           5.50%          4.75%
           -------------------------------------------------------------------------
           $50,000 - $99,999    4.71%           4.50%          4.00%
           -------------------------------------------------------------------------
           $100,000 - $249,999  3.63%           3.50%          3.00%
           -------------------------------------------------------------------------
           $250,000 - $499,999  2.56%           2.50%          2.00%
           -------------------------------------------------------------------------
           $500,000 - $999,999  2.04%           2.00%          1.75%
           -------------------------------------------------------------------------
           $1,000,000+          0.00%(/1/)      0.00%(/1/)     0.75%(/2/)
</TABLE>
 
              30/70 PORTFOLIO
<TABLE>
<CAPTION>
                                                               DISCOUNT OR
                                SALES CHARGE AS SALES CHARGE   COMMISSION TO
           AMOUNT OF            % OF NET        AS % OF PUBLIC DEALERS AS % OF
           PURCHASE             AMOUNT INVESTED OFFERING PRICE PUBLIC OFFERING PRICE
           -------------------------------------------------------------------------
           <S>                  <C>             <C>            <C>
           $0 - $49,999         4.71%           4.50%          4.00%
           -------------------------------------------------------------------------
           $50,000 - $99,999    4.17%           4.00%          3.50%
           -------------------------------------------------------------------------
           $100,000 - $249,999  3.63%           3.50%          3.00%
           -------------------------------------------------------------------------
           $250,000 - $499,999  2.56%           2.50%          2.00%
           -------------------------------------------------------------------------
           $500,000 - $999,999  2.04%           2.00%          1.75%
           -------------------------------------------------------------------------
           $1,000,000+          0.00%(/1/)      0.00%(/1/)     0.50%(/2/)
</TABLE>
 
            1. As shown, investors that purchase more than $1,000,000 of any
            Portfolio's Class A shares will not pay any initial sales charge
            on such purchase. However, purchasers of $1,000,000 or more of
            Class A shares (other than those purchasers described below under
            "Sales at Net Asset Value" where no commission is paid) will be
            subject to a CDSC of 1% if such shares are redeemed during the
            first 18 months after such shares are purchased unless such pur-
            chaser is eligible for a waiver of the CDSC as described under
            "Waiver of Contingent Deferred Sales Charges" above. See "Class A
            Deferred Sales Charge" below.
            2. The Distributor will pay a commission to dealers who sell
            amounts of $1,000,000 or more of Class A shares (or who sell Class
            A shares at net asset value to certain employer-sponsored plans as
            outlined in "Sales at Net Asset Value" below) of the 90/10 Portfo-
            lio and the 60/40 Portfolio according to the following schedule:
            0.75% of the first $2,000,000, 0.50% of amounts from $2,000,001 to
            $5,000,000, and 0.25% of amounts over $5,000,000; and of the 30/70
            Portfolio according to the following schedule: 0.50% of the first
            $2,000,000, and 0.25% of amounts over $2,000,000.
 
               Each Portfolio receives the entire net asset value of its Class
            A shares purchased by investors. The Distributor receives the
            sales charge shown above less any applicable discount or commis-
            sion "reallowed" to participating brokers in the amounts indicated
            in the table above. The Distributor may, however, elect to reallow
            the entire sales charge to participating brokers for all sales
            with respect to which orders are placed with the Distributor for
            any particular Portfolio during a particular period. During such
            periods as may from time to time be designated by the Distributor,
            the Distributor will pay an additional amount of up to 0.50% of
            the purchase price on sales of Class A shares of all or selected
            Portfolios purchased to each participating broker which obtains
            purchase orders in amounts exceeding thresholds established from
            time to time by the Distributor. From time to time, the Distribu-
            tor, its parent and/or its affiliates may make additional payments
            to one or more participating brokers based upon factors such as
            the level of sales or the length of time clients' assets have re-
            mained in the Trust.
               Shares issued pursuant to the automatic reinvestment of income
            dividends or capital gains distributions are issued at net asset
            value and are not subject to any sales charges.
 
24  PIMCO Funds Asset Allocation Series

<PAGE>
 
               Under the circumstances described below, investors may be enti-
            tled to pay reduced sales charges for Class A shares.
 
            COMBINED PURCHASE PRIVILEGE Investors may qualify for a reduced
            sales charge by combining purchases of the Class A shares of one
            or more Portfolios or other series of the Trust or PIMCO Funds:
            Pacific Investment Management Series which offer Class A shares
            (together, "eligible PIMCO Funds") into a "single purchase," if
            the resulting purchase totals at least $50,000. The term "single
            purchase" refers to:
                (i)   a single purchase by an individual, or concurrent pur-
                      chases, which in the aggregate are at least equal to the
                      prescribed amounts, by an individual, his or her spouse
                      and their children under the age of 21 years purchasing
                      Class A shares of the eligible PIMCO Funds for his, her or
                      their own account;
                (ii)  a single purchase by a trustee or other fiduciary pur-
                      chasing shares for a single trust, estate or fiduciary
                      account although more than one beneficiary is involved;
                      or
                (iii) a single purchase for the employee benefit plans of a
                      single employer.
               For further information, call the Distributor at 1-800-426-0107
            or your broker.
 
            CUMULATIVE QUANTITY DISCOUNT (RIGHT OF ACCUMULATION) A purchase of
            additional Class A shares of any eligible PIMCO Fund may qualify
            for a Cumulative Quantity Discount at the rate applicable to the
            discount bracket obtained by adding:
                (i)   the investor's current purchase;
                (ii)  the value (at the close of business on the day of the
                      current purchase) of all Class A shares of any eligible
                      PIMCO Fund held by the investor computed at the maximum
                      offering price; and
                (iii) the value of all shares described in paragraph (ii)
                      owned by another shareholder eligible to be combined
                      with the investor's purchase into a "single purchase" as
                      defined above under "Combined Purchase Privilege."
               For example, if you owned Class A shares of the 90/10 Portfolio
            worth $25,000 at the current maximum offering price and wished to
            purchase Class A shares of the 60/40 Portfolio worth an additional
            $30,000, the sales charge for the $30,000 purchase would be at the
            4.50% rate applicable to a single $55,000 purchase of shares of
            the 90/10 Portfolio, rather than the 5.50% rate.
 
            LETTER OF INTENT An investor may also obtain a reduced sales
            charge by means of a written Letter of Intent, which expresses an
            intention to invest not less than $50,000 within a period of 13
            months in Class A shares of any eligible PIMCO Fund(s). Each pur-
            chase of shares under a Letter of Intent will be made at the pub-
            lic offering price or prices applicable at the time of such pur-
            chase to a single transaction of the dollar amount indicated in
            the Letter. At the investor's option, a Letter of Intent may in-
            clude purchases of Class A shares of any eligible PIMCO Fund made
            not more than 90 days prior to the date the Letter of Intent is
            signed; however, the 13-month period during which the Letter is in
            effect will begin on the date of the earliest purchase to be in-
            cluded and the sales charge on any purchases prior to the Letter
            will not be adjusted.
               Investors qualifying for the Combined Purchase Privilege de-
            scribed above may purchase shares of the eligible PIMCO Funds un-
            der a single Letter of Intent. For example, if at the time you
            sign a Letter of Intent to invest at least $100,000 in Class A
            shares of any Portfolio, you and your spouse each purchase Class A
            shares of the 90/10 Portfolio worth $30,000 (for a total of
            $60,000), it will only be necessary to invest a total of $40,000
            during the following 13 months in Class A shares of any of the
            Portfolios to qualify for the 3.50% sales charge on the total
            amount being invested (the sales charge applicable to an invest-
            ment of $100,000 in any of the Portfolios).
               A Letter of Intent is not a binding obligation to purchase the
            full amount indicated. The minimum initial investment under a Let-
            ter of Intent is 5% of such amount. Shares purchased with the
            first 5% of such amount will be held in escrow (while remaining
            registered in your name) to secure payment of the higher sales
            charge applicable to the shares actually purchased in the event
            the full intended amount is not purchased. If the full amount in-
            dicated is not purchased, a sufficient amount of such escrowed
            shares will be involuntarily redeemed to pay the additional sales
            charge applicable to the amount actually purchased, if necessary.
            Dividends on escrowed shares, whether paid in cash
 
                                                 November 1, 1998 Prospectus  25
<PAGE>
 
            or reinvested in additional eligible PIMCO Fund shares, are not
            subject to escrow. When the full amount indicated has been pur-
            chased, the escrow will be released. If you wish to enter into a
            Letter of Intent in conjunction with your initial investment in
            Class A shares of a Portfolio, you should complete the appropriate
            portion of the account application. If you are a current Class A
            shareholder desiring to do so you may obtain a form of Letter of
            Intent by contacting the Distributor at 1-800-426-0107 or any bro-
            ker participating in this program.
 
            REINSTATEMENT PRIVILEGE A Class A shareholder who has caused any
            or all of his shares to be redeemed may reinvest all or any por-
            tion of the redemption proceeds in Class A shares of any eligible
            PIMCO Fund at net asset value without any sales charge, provided
            that such reinvestment is made within 120 calendar days after the
            redemption or repurchase date. Shares are sold to a reinvesting
            shareholder at the net asset value next determined. See "How Net
            Asset Value is Determined." A reinstatement pursuant to this priv-
            ilege will not cancel the redemption transaction and, consequent-
            ly, any gain or loss so realized may be recognized for federal tax
            purposes except that no loss may be recognized to the extent that
            the proceeds are reinvested in shares of the same Portfolio within
            30 days. The reinstatement privilege may be utilized by a share-
            holder only once, irrespective of the number of shares redeemed,
            except that the privilege may be utilized without limit in connec-
            tion with transactions whose sole purpose is to transfer a share-
            holder's interest in a Portfolio to his Individual Retirement Ac-
            count or other qualified retirement plan account. An investor may
            exercise the reinstatement privilege by written request sent to
            the Distributor or to the investor's broker.
 
            SALES AT NET ASSET VALUE Each Portfolio may sell its Class A
            shares at net asset value without a sales charge to (a) current or
            retired officers, trustees, directors or employees of the Trust,
            the Adviser or the Distributor, a parent, brother or sister of any
            such officer, trustee, director or employee or a spouse or child
            of any of the foregoing persons, or any trust, profit sharing or
            pension plan for the benefit of any such person and to any other
            person if the Distributor anticipates that there will be minimal
            sales expenses associated with the sale, (b) current or retired
            trustees of PIMCO Funds: Pacific Investment Management Series, (c)
            current registered representatives and other full-time employees
            of participating brokers or such persons' spouses or for trust or
            custodial accounts for their minor children, (d) trustees or other
            fiduciaries purchasing shares for certain plans sponsored by em-
            ployers, professional organizations or associations or charitable
            organizations, the trustee, administrator, fiduciary, broker,
            trust company or registered investment adviser for which has an
            agreement with the Distributor with respect to such purchases (in-
            cluding provisions related to minimum levels of investment in the
            Trust), and to participants in such plans and their spouses pur-
            chasing for their account(s) or IRAs (with the exception of Roth
            IRAs), (e) participants investing through accounts known as "wrap
            accounts" established with brokers or dealers approved by the Dis-
            tributor where such brokers or dealers are paid a single, inclu-
            sive fee for brokerage and investment management services, (f)
            client accounts of broker-dealers or registered investment advis-
            ers affiliated with such broker-dealers with which the Distributor
            has an agreement for the use of PIMCO Funds: Multi-Manager Series
            in particular investment products or programs, and (g) accounts
            for which a trust company affiliated with the Trust or the Adviser
            serves as trustee or custodian. As described above, the Distribu-
            tor will not pay any initial commission to dealers upon the sale
            of Class A shares to the purchasers described in this paragraph
            except for sales to purchasers described under (d) in this para-
            graph.
 
            NOTIFICATION OF DISTRIBUTOR An investor or participating broker
            must notify the Distributor whenever a quantity discount or re-
            duced sales charge is applicable to a purchase and must provide
            the Distributor with sufficient information at the time of pur-
            chase to verify that each purchase qualifies for the privilege or
            discount. Upon such notification, the investor will receive the
            lowest applicable sales charge. The quantity discounts described
            above may be modified or terminated at any time.
 
            CLASS A DEFERRED SALES CHARGE For all Portfolios, investors who
            purchase $1,000,000 or more of Class A shares (and, thus, purchase
            such shares without any initial sales charge) may be subject to a
            1% CDSC (the "Class A CDSC") if such shares are redeemed within 18
            months of their purchase. The Class A CDSC does not apply to in-
            vestors purchasing $1,000,000 or more of any Portfolio's Class A
            shares if such investors are otherwise eligible to purchase Class
            A shares without any sales charge because they are described under
            "Sales at Net Asset Value" above.
 
26  PIMCO Funds Asset Allocation Series

<PAGE>
 
               For purchases subject to the Class A CDSC, a 1% CDSC will apply
            for any redemption of such Class A shares that occurs within 18
            months of their purchase. No CDSC will be imposed if the shares
            redeemed have been acquired through the reinvestment of dividends
            or capital gains distributions or if the amount redeemed is de-
            rived from increases in the value of the account above the amount
            of purchase payments subject to the CDSC. In determining whether a
            CDSC is payable, it is assumed that Class A shares acquired
            through the reinvestment of dividends and distributions are re-
            deemed first, and thereafter that Class A shares that have been
            held by an investor for the longest period of time are redeemed
            first.
               The Class A CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For more
            information about the Class A CDSC, call the Distributor at 1-800-
            426-0107.
 
            PARTICIPATING BROKERS Investment dealers and other financial in-
            termediaries provide varying arrangements for their clients to
            purchase and redeem Portfolio shares. Some may establish higher
            minimum investment requirements than set forth above. Firms may
            arrange with their clients for other investment or administrative
            services and may independently establish and charge transaction
            fees and/or other additional amounts to their clients for such
            services, which charges would reduce clients' return. Firms also
            may hold Portfolio shares in nominee or street name as agent for
            and on behalf of their customers. In such instances, the Trust's
            transfer agent will have no information with respect to or control
            over accounts of specific shareholders. Such shareholders may ob-
            tain access to their accounts and information about their accounts
            only from their broker. In addition, certain privileges with re-
            spect to the purchase and redemption of shares or the reinvestment
            of dividends may not be available through such firms. Some firms
            may participate in a program allowing them access to their cli-
            ents' accounts for servicing including, without limitation, trans-
            fers of registration and dividend payee changes; and may perform
            functions such as generation of confirmation statements and dis-
            bursement of cash dividends. This Prospectus should be read in
            connection with such firms' material regarding their fees and
            services.
 
 
DEFERRED    Class B shares are sold at their current net asset value without
SALES       any initial sales charge. The full amount of an investor's pur-
CHARGE      chase payment will be invested in shares of the Portfolio(s) se-
ALTERNATIVE lected. A CDSC will be imposed on Class B shares if an investor
- -- CLASS B  redeems an amount which causes the current value of the investor's
SHARES      account for a Portfolio to fall below the total dollar amount of
            purchase payments subject to the CDSC, except that no CDSC is im-
            posed if the shares redeemed have been acquired through the rein-
            vestment of dividends or capital gains distributions or if the
            amount redeemed is derived from increases in the value of the ac-
            count above the amount of purchase payments subject to the CDSC.
               Whether a CDSC is imposed and the amount of the CDSC will de-
            pend on the number of years since the investor made a purchase
            payment from which an amount is being redeemed. Purchases are sub-
            ject to the CDSC according to the following schedule:
 
 
<TABLE>
<CAPTION>
           YEAR SINCE PURCHASE   PERCENTAGE CONTINGENT
           PAYMENT WAS MADE      DEFERRED SALES CHARGE
           -------------------------------------------
           <S>                   <C>
           First                   5
           -------------------------------------------
           Second                  4
           -------------------------------------------
           Third                   3
           -------------------------------------------
           Fourth                  3
           -------------------------------------------
           Fifth                   2
           -------------------------------------------
           Sixth                   1
           -------------------------------------------
           Seventh                 0*
</TABLE>
 
            *After the seventh year, Class B shares convert into Class A
            shares as described below.
 
                                                 November 1, 1998 Prospectus  27
<PAGE>
 
 
               In determining whether a CDSC is payable, it is assumed that
            the purchase payment from which a redemption is made is the earli-
            est purchase payment from which a redemption or exchange has not
            already been fully effected.
               The following example will illustrate the operation of the
            Class B CDSC:
               Assume that an individual opens an account and makes a purchase
            payment of $10,000 for Class B shares of a Portfolio and that six
            months later the value of the investor's account for that Portfo-
            lio has grown through investment performance and reinvestment of
            distributions to $11,000. The investor then may redeem up to
            $1,000 from that Portfolio ($11,000 minus $10,000) without incur-
            ring a CDSC. If the investor should redeem $3,000, a CDSC would be
            imposed on $2,000 of the redemption (the amount by which the in-
            vestor's account for the Portfolio was reduced below the amount of
            the purchase payment). At the rate of 5%, the Class B CDSC would
            be $100.
               In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all Class
            B shares in the shareholder's account with the particular Portfo-
            lio are aggregated, and the current value of all such shares is
            aggregated. Any CDSC imposed on a redemption of Class B shares is
            paid to the Distributor.
               Class B shares are subject to higher distribution fees than
            Class A shares for a fixed period after their purchase, after
            which they automatically convert to Class A shares and are no
            longer subject to such higher distribution fees. Class B shares of
            each Portfolio automatically convert into Class A shares after
            they have been held for seven years.
               For sales of Class B shares made and services rendered to Class
            B shareholders, the Distributor intends to make payments to par-
            ticipating brokers, at the time a shareholder purchases Class B
            shares, of 4.00% of the purchase amount for each of the Portfo-
            lios. During such periods as may from time to time be designated
            by the Distributor, the Distributor will pay selected participat-
            ing brokers an additional amount of up to .50% of the purchase
            price on sales of Class B shares of all or selected Portfolios
            purchased to each participating broker which obtains purchase or-
            ders in amounts exceeding thresholds established from time to time
            by the Distributor.
               The Class B CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For more
            information about the Class B CDSC, call the Distributor at 1-800-
            426-0107.
 
 
ASSET BASED Class C shares are sold at their current net asset value without
SALES       any initial sales charge. A CDSC is imposed on Class C shares if
CHARGE      an investor redeems an amount which causes the current value of
ALTERNATIVE the investor's account for a Portfolio to fall below the total
- -- CLASS C  dollar amount of purchase payments subject to the CDSC, except
SHARES      that no CDSC is imposed if the shares redeemed have been acquired
            through the reinvestment of dividends or capital gains distribu-
            tions or if the amount redeemed is derived from increases in the
            value of the account above the amount of purchase payments subject
            to the CDSC. All of an investor's purchase payments are invested
            in shares of the Portfolio(s) selected.
               Whether a CDSC is imposed and the amount of the CDSC will de-
            pend on the number of years since the investor made a purchase
            payment from which an amount is being redeemed. Purchases are sub-
            ject to the CDSC according to the following schedule:
 
 
<TABLE>
<CAPTION>
           YEAR SINCE PURCHASE   PERCENTAGE CONTINGENT
           PAYMENT WAS MADE      DEFERRED SALES CHARGE
           -------------------------------------------
           <S>                   <C>
           First                   1
           -------------------------------------------
           Thereafter              0
</TABLE>
 
 
               In determining whether a CDSC is payable, it is assumed that
            the purchase payment from which the redemption is made is the ear-
            liest purchase payment (from which a redemption or exchange has
            not already been effected).
 
28  PIMCO Funds Asset Allocation Series

<PAGE>
 
               The following example will illustrate the operation of the
            Class C CDSC:
               Assume that an individual opens an account and makes a purchase
            payment of $10,000 for Class C shares of a Portfolio and that six
            months later the value of the investor's account for that Portfo-
            lio has grown through investment performance and reinvestment of
            distributions to $11,000. The investor then may redeem up to
            $1,000 from that Portfolio ($11,000 minus $10,000) without incur-
            ring a CDSC. If the investor should redeem $3,000, a CDSC would be
            imposed on $2,000 of the redemption (the amount by which the in-
            vestor's account for the Portfolio was reduced below the amount of
            the purchase payment). At the rate of 1%, the Class C CDSC would
            be $20.
               In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all Class
            C shares in the shareholder's account with the particular Portfo-
            lio are aggregated, and the current value of all such shares is
            aggregated. Any CDSC imposed on a redemption of Class C shares is
            paid to the Distributor. Unlike Class B shares, Class C shares do
            not automatically convert to any other class of shares of the
            Portfolios.
               Except as described below, for sales of Class C shares made and
            services rendered to Class C shareholders, the Distributor expects
            to make payments to participating brokers, at the time the share-
            holder purchases Class C shares, of 1.00% (representing .75% dis-
            tribution fees and .25% servicing fees) of the purchase amount for
            all Portfolios. For sales of Class C shares made to participants
            making periodic purchases of not less than $50 through certain em-
            ployer sponsored savings plans which are clients of a broker-
            dealer with which the Distributor has an agreement with respect to
            such purchases, no payments are made at the time of purchase. Dur-
            ing such periods as may from time to time be designated by the
            Distributor, the Distributor will pay an additional amount of up
            to .50% of the purchase price on sales of Class C shares of all or
            selected Portfolios purchased to each participating broker which
            obtains purchase orders in amounts exceeding thresholds estab-
            lished from time to time by the Distributor.
               The Class C CDSC is currently waived in connection with certain
            redemptions as described above under "Alternative Purchase Ar-
            rangements--Waiver of Contingent Deferred Sales Charges." For more
            information about the Class C CDSC, contact the Distributor at 1-
            800-426-0107.
 
            Exchange Privilege
 
            A shareholder may exchange Class A, Class B and Class C shares of
            any Portfolio for the same Class of shares of any other Portfolio
            or other series of the Trust in an account with identical regis-
            tration on the basis of their respective net asset values. Class
            A, Class B and Class C shares of each Portfolio may also be ex-
            changed for shares of the same class of a series of PIMCO Funds:
            Pacific Investment Management Series. There are currently no ex-
            change fees or charges. Exchanges of shares outstanding on Septem-
            ber 30, 1998 may be made in any amount through December 31, 1998
            into any other Portfolio. All other exchanges, including exchanges
            from a Portfolio into another series of the Trust or of PIMCO
            Funds: Pacific Investment Management Series, are subject to the
            $2,500 minimum initial purchase requirement for each Portfolio,
            except with respect to tax-qualified programs and exchanges ef-
            fected through the PIMCO Funds Auto-Exchange plan. An exchange
            will constitute a taxable sale for federal income tax purposes.
               Investors who maintain their account with the Distributor may
            exchange shares by a written exchange request sent to PIMCO Funds
            Distributors LLC, P.O. Box 5866, Denver, CO 80217-5866 or, unless
            the investor has specifically declined telephone exchange privi-
            leges on the account application or elected in writing not to uti-
            lize telephone exchanges, by a telephone request to the Transfer
            Agent at 1-800-426-0107. The Trust will employ reasonable proce-
            dures to confirm that instructions communicated by telephone are
            genuine, and may be liable for any losses due to unauthorized or
            fraudulent instructions if it fails to employ such procedures. The
            Trust will require a form of personal identification prior to act-
            ing on a caller's telephone instructions, will provide written
            confirmations of such transactions and will record telephone in-
            structions. Exchange forms are available from the Distributor at
            1-800-426-0107 and may be used if there will be no change in the
            registered name or address of the shareholder. Changes in regis-
            tration information or account privileges may be made in writing
            to the Transfer Agent, Shareholder Services, Inc.,
 
                                                 November 1, 1998 Prospectus  29
<PAGE>
 
            P.O. Box 5866, Denver, Colorado 80217-5866, or by use of forms
            which are available from the Distributor. A signa
            ture guarantee is required. See "How to Buy Shares--Signature
            Guarantee." Telephone exchanges may be made between 9:00 a.m.,
            Eastern time and the close of regular trading (normally 4:00 p.m.,
            Eastern time) on the Exchange on any day the Exchange is open
            (generally weekdays other than normal holidays). The Trust re-
            serves the right to refuse exchange purchases if, in the judgment
            of the Adviser, the purchase would adversely affect the Portfolio
            and its shareholders. In particular, a pattern of exchanges char-
            acteristic of "market-timing" strategies may be deemed by the Ad-
            viser to be detrimental to the Trust or a particular Portfolio.
               Currently, the Trust limits the number of "round trip" ex-
            changes an investor may make. An investor makes a "round trip" ex-
            change when the investor purchases shares of a particular Portfo-
            lio, subsequently exchanges those shares for shares of a different
            Portfolio or other PIMCO Fund and then exchanges back into the
            originally purchased Portfolio. The Trust has the right to refuse
            any exchange for any investor who completes (by making the ex-
            change back into the shares of the originally purchased Portfolio)
            more than six round trip exchanges in any twelve-month period. Al-
            though the Trust has no current intention of terminating or modi-
            fying the exchange privilege other than as set forth in the pre-
            ceding sentence, it reserves the right to do so at any time. Ex-
            cept as otherwise permitted by Securities and Exchange Commission
            regulations, the Trust will give 60 days' advance notice to share-
            holders of any termination or material modification of the ex-
            change privilege. For further information about exchange privi-
            leges, contact your participating broker or call the Transfer
            Agent at 1-800-426-0107.
               With respect to Class B and Class C shares, or Class A shares
            subject to a CDSC, if less than all of an investment is exchanged
            out of a Portfolio, any portion of the investment attributable to
            capital appreciation and/or reinvested dividends or capital gains
            distributions will be exchanged first, and thereafter any portions
            exchanged will be from the earliest investment made in the Portfo-
            lio from which the exchange was made. Shareholders should take
            into account the effect of any exchange on the applicability of
            any CDSC that may be imposed upon any subsequent redemption.
               Investors may also select the PIMCO Funds Auto-Exchange plan
            which establishes automatic periodic exchanges. For further infor-
            mation on automatic exchanges, see "How to Buy Shares--PIMCO Funds
            Auto-Exchange" above.
 
            How to Redeem
 
            Class A, Class B or Class C shares may be redeemed through a par-
            ticipating broker, by telephone, by submitting a written redemp-
            tion request directly to the Transfer Agent (for non-broker ac-
            counts), or through an Automatic Withdrawal Plan or PIMCO Funds
            Fund Link.
 
               A CDSC may apply to a redemption of Class A, Class B or Class C
            shares. See "Alternative Purchase Arrangements" above. Shares are
            redeemed at their net asset value next determined after a proper
            redemption request has been received, less any applicable CDSC.
            There is no charge by the Distributor (other than an applicable
            CDSC) with respect to a redemption; however, a participating bro-
            ker who processes a redemption for an investor may charge custom-
            ary commissions for its services. Dealers and other financial
            services firms are obligated to transmit orders promptly. Requests
            for redemption received by dealers or other firms prior to the
            close of regular trading (normally 4:00 p.m., Eastern time) on the
            Exchange on a regular business day and received by the Distributor
            prior to the close of the Distributor's business day will be con-
            firmed at the net asset value effective as of the closing of the
            Exchange on that day, less any applicable CDSC.
 
 
DIRECT
REDEMPTION  A shareholder's original account application permits the share-
            holder to redeem by written request and by telephone (unless the
            shareholder specifically elects not to utilize telephone redemp-
            tions) and to elect one or more of the additional redemption pro-
            cedures described below. A shareholder may change the instructions
            indicated on his original account application, or may request ad-
            ditional redemption options, only by transmitting a written direc-
            tion to the
 
30  PIMCO Funds Asset Allocation Series

<PAGE>
 
            Transfer Agent. Requests to institute or change any of the addi-
            tional redemption procedures will require a signature guarantee.
               Redemption proceeds will normally be mailed to the redeeming
            shareholder within seven days or, in the case of wire transfer or
            Fund Link redemptions, sent to the designated bank account within
            one business day. Fund Link redemptions may be received by the
            bank on the second or third business day. In cases where shares
            have recently been purchased by personal check, redemption pro-
            ceeds may be withheld until the check has been collected, which
            may take up to 15 days. To avoid such withholding, investors
            should purchase shares by certified or bank check or by wire
            transfer.
 
 
WRITTEN     To redeem shares in writing (whether or not represented by certif-
REQUESTS    icates), a shareholder must send the following items to the Trans-
            fer Agent, Shareholder Services, Inc., P.O. Box 5866, Denver, Col-
            orado 80217-5866:
                (1) a written request for redemption signed by all registered
                    owners exactly as the account is registered on the Trans-
                    fer Agent's records, including fiduciary titles, if any,
                    and specifying the account number and the dollar amount or
                    number of shares to be redeemed;
                (2) for certain redemptions described below, a guarantee of
                    all signatures on the written request or on the share cer-
                    tificate or accompanying stock power, if required, as de-
                    scribed under "How to Buy Shares--Signature Guarantee";
                (3) any share certificates issued for any of the shares to be
                    redeemed (see "Certificated Shares" below); and
                (4) any additional documents which may be required by the
                    Transfer Agent for redemption by corporations, partner-
                    ships or other organizations, executors, administrators,
                    trustees, custodians or guardians, or if the redemption is
                    requested by anyone other than the shareholder(s) of rec-
                    ord.
               Transfers of shares are subject to the same requirements. A
            signature guarantee is not required for redemptions of $50,000 or
            less, requested by and payable to all shareholders of record for
            the account, to be sent to the address of record for that account.
            To avoid delay in redemption or transfer, shareholders having any
            questions about these requirements should contact the Transfer
            Agent in writing or call 1-800-426-0107 before submitting a re-
            quest. Redemption or transfer requests will not be honored until
            all required documents in the proper form have been received by
            the Transfer Agent. This redemption option does not apply to
            shares held in broker "street name" accounts.
               If the proceeds of the redemption (i) exceed $50,000, (ii) are
            to be paid to a person other than the record owner, (iii) are to
            be sent to an address other than the address of the account on the
            Transfer Agent's records, or (iv) are to be paid to a corporation,
            partnership, trust or fiduciary, the signature(s) on the redemp-
            tion request and on the certificates, if any, or stock power must
            be guaranteed as described above, except that the Distributor may
            waive the signature guarantee requirement for redemptions up to
            $2,500 by a trustee of a qualified retirement plan, the adminis-
            trator for which has an agreement with the Distributor.
 
 
TELEPHONE   The Trust accepts telephone requests for redemption of
REDEMPTIONS uncertificated shares for amounts up to $50,000 within any seven
            calendar day period, except for investors who have specifically
            declined telephone redemption privileges on the account applica-
            tion or elected in writing not to utilize telephone redemptions.
            The proceeds of a telephone redemption will be sent to the record
            shareholder at his record address. Changes in account information
            must be made in a written authorization with a signature guaran-
            tee. See "How to Buy Shares--Signature Guarantee." Telephone re-
            demptions will not be accepted during the 30-day period following
            any change in an account's record address. This redemption option
            does not apply to shares held in broker "street name" accounts.
               By completing an account application, an investor agrees that
            the Trust, the Distributor and the Transfer Agent shall not be li-
            able for any loss incurred by the investor by reason of the Trust
            accepting unauthorized telephone redemption requests for his ac-
            count if the Trust reasonably believes the instructions to be gen-
            uine. Thus, shareholders risk possible losses in the event of a
            telephone redemption not authorized by them. The Trust may accept
            telephone redemption instructions from any person identifying him-
            self as the owner of an account or the owner's broker where the
            owner has not declined in writing to utilize this service. The
            Trust will employ reasonable procedures to confirm
 
                                                 November 1, 1998 Prospectus  31
<PAGE>
 
            that instructions communicated by telephone are genuine, and may
            be liable for any losses due to unauthorized or fraudulent in-
            structions if it fails to employ such procedures. The Trust will
            require a form of personal identification prior to acting on a
            caller's telephone instructions, will provide written confirma-
            tions of such transactions and will record telephone instructions.
               A shareholder making a telephone redemption should call the
            Transfer Agent at 1-800-426-0107 and state (i) the name of the
            shareholder as it appears on the Transfer Agent's records, (ii)
            his account number with the Trust, (iii) the amount to be with-
            drawn and (iv) the name of the person requesting the redemption.
            Usually the proceeds are sent to the investor on the next Trust
            business day after the redemption is effected, provided the re-
            demption request is received prior to the close of regular trading
            (normally 4:00 p.m., Eastern time) on the Exchange that day. If
            the redemption request is received after the close of the Ex-
            change, the redemption is effected on the following Trust business
            day at that day's net asset value and the proceeds are usually
            sent to the investor on the second following Trust business day.
            The Trust reserves the right to terminate or modify the telephone
            redemption service at any time. During times of severe disruptions
            in the securities markets, the volume of calls may make it diffi-
            cult to redeem by telephone, in which case a shareholder may wish
            to send a written request for redemption as described under "Writ-
            ten Requests" above. Telephone communications may be recorded by
            the Distributor or the Transfer Agent.
 
 
FUND LINK   If a shareholder has established Fund Link, the shareholder may
REDEMPTIONS redeem shares by telephone and have the redemption proceeds sent
            to a designated account at a financial institution. Fund Link is
            normally established within 45 days of receipt of a Fund Link ap-
            plication by the Transfer Agent. To use Fund Link for redemptions,
            call the Transfer Agent at 1-800-426-0107. Subject to the limita-
            tions set forth above under "Telephone Redemptions," the Distribu-
            tor, the Trust and the Transfer Agent may rely on instructions by
            any registered owner believed to be genuine and will not be re-
            sponsible to any shareholder for any loss, damage or expense aris-
            ing out of such instructions. Requests received by the Transfer
            Agent prior to the close of regular trading (normally 4:00 p.m.,
            Eastern time) on the Exchange on a business day will be processed
            at the net asset value on that day and the proceeds (less any
            CDSC) will normally be sent to the designated bank account on the
            following business day and received by the bank on the second or
            third business day. If the redemption request is received after
            the close of regular trading on the Exchange, the redemption is
            effected on the following business day. Shares purchased by check
            may not be redeemed through Fund Link until such shares have been
            owned (i.e., paid for) for at least 15 days. Fund Link may not be
            used to redeem shares held in certificated form.
               Changes in bank account information must be made by completing
            a new Fund Link application, signed by all owners of record of the
            account, with all signatures guaranteed. See "How to Buy Shares--
            Signature Guarantee." See "How to Buy Shares--PIMCO Funds Fund
            Link" for information on establishing the Fund Link privilege. The
            Trust may terminate the Fund Link program at any time without no-
            tice to shareholders. This redemption option does not apply to
            shares held in broker "street name" accounts.
 
 
PIMCO FUNDS PIMCO Funds Automated Telephone System ("ATS") is an automated
AUTOMATED   telephone system that enables shareholders to perform a number of
TELEPHONE   account transactions automatically using a touch-tone telephone.
SYSTEM      ATS may be used on already- established Portfolio accounts after
            you obtain a Personal Identification Number (PIN) by calling the
            special ATS number: 1-800-223-2413.
            PURCHASING SHARES. You may purchase shares in amounts up to
            $100,000 by telephone by calling 1-800-223-2413. You must have es-
            tablished ATS privileges to link your bank account with the Port-
            folio to pay for these purchases.
            EXCHANGING SHARES. With the PIMCO Funds Exchange Privilege, you
            can exchange shares automatically by telephone from your Fund Link
            Account to another PIMCO Funds account you have already estab-
            lished by calling 1-800-223-2413. Please refer to "Exchange Privi-
            lege" for details.
            REDEMPTIONS. You may redeem shares by telephone automatically by
            calling 1-800-223-2413 and the Portfolio will send the proceeds
            directly to your Portfolio bank account. Please refer to "How to
            Redeem" for details.
 
32  PIMCO Funds Asset Allocation Series
<PAGE>
 
 
EXPEDITED   If a shareholder has given authorization for expedited wire re-
WIRE        demption, shares can be redeemed and the proceeds sent by federal
TRANSFER    wire transfer to a single previously designated bank account. Re-
REDEMPTIONS quests received by the Trust prior to the close of the Exchange
            will result in shares being redeemed that day at the next deter-
            mined net asset value (less any CDSC) and normally the proceeds
            being sent to the designated bank account the following business
            day. The bank must be a member of the Federal Reserve wire system.
            Delivery of the proceeds of a wire redemption request may be de-
            layed by the Trust for up to 7 days if the Distributor deems it
            appropriate under then current market conditions. Once authoriza-
            tion is on file, the Trust will honor requests by any person iden-
            tifying himself as the owner of an account or the owner's broker
            by telephone at 1-800-426-0107 or by written instructions. The
            Trust cannot be responsible for the efficiency of the Federal Re-
            serve wire system or the shareholder's bank. The Trust does not
            currently charge for wire transfers. The shareholder is responsi-
            ble for any charges imposed by the shareholder's bank. The minimum
            amount that may be wired is $2,500. The Trust reserves the right
            to change this minimum or to terminate the wire redemption privi-
            lege. Shares purchased by check may not be redeemed by wire trans-
            fer until such shares have been owned (i.e., paid for) for at
            least 15 days. Expedited wire transfer redemptions may be autho-
            rized by completing a form available from the Distributor. Wire
            redemptions may not be used to redeem shares in certificated form.
            To change the name of the single bank account designated to re-
            ceive wire redemption proceeds, it is necessary to send a written
            request with signatures guaranteed to PIMCO Funds Distributors
            LLC, P.O. Box 5866, Denver, CO 80217-5866. See "How to Buy
            Shares--Signature Guarantee." This redemption option does not ap-
            ply to shares held in broker "street name" accounts.
 
 
CERTIFICATEDTo redeem shares for which certificates have been issued, the cer-
SHARES      tificates must be mailed to or deposited with the Trust, duly en-
            dorsed or accompanied by a duly endorsed stock power or by a writ-
            ten request for redemption. Signatures must be guaranteed as de-
            scribed under "How to Buy Shares--Signature Guarantee." Further
            documentation may be requested from institutions or fiduciary ac-
            counts, such as corporations, custodians (e.g., under the Uniform
            Gifts to Minors Act), executors, administrators, trustees or
            guardians ("institutional account owners"). The redemption request
            and stock power must be signed exactly as the account is regis-
            tered, including indication of any special capacity of the regis-
            tered owner.
 
 
 
 
AUTOMATIC   An investor who owns or buys shares of a Portfolio having a net
WITHDRAWAL  asset value of $10,000 or more may open an Automatic Withdrawal
PLAN        Plan and have a designated sum of money (not less than $100 per
            Portfolio) paid monthly (or quarterly) to the investor or another
            person. Such a plan may be established by completing the appropri-
            ate section of the account application or you may obtain an Auto-
            matic Withdrawal Plan application from the Distributor or your
            broker. If an Automatic Withdrawal Plan is set up after the ac-
            count is established providing for payment to a person other than
            the record shareholder or to an address other than the address of
            record, a signature guarantee is required. See "How to Buy
            Shares--Signature Guarantee." Class A, Class B and Class C shares
            of any Portfolio are deposited in a plan account and all distribu-
            tions are reinvested in additional shares of the particular class
            of the Portfolio at net asset value. Shares in a plan account are
            then redeemed at net asset value (less any applicable CDSC) to
            make each withdrawal payment. Any applicable CDSC may be waived
            for certain redemptions under an Automatic Withdrawal Plan. See
            "Alternative Purchase Arrangements--Waiver of Contingent Deferred
            Sales Charges."
               Redemptions for the purpose of withdrawals are ordinarily made
            on the business day preceding the day of payment at that day's
            closing net asset value and checks are mailed on the day of pay-
            ment selected by the shareholder. The Transfer Agent may acceler-
            ate the redemption and check mailing date by one day to avoid
            weekend delays. Payment will be made to any person the investor
            designates; however, if the shares are registered in the name of a
            trustee or other fiduciary, payment will be made only to the fidu-
            ciary, except in the case of a profit-sharing or pension plan
            where payment will be made to the designee. As withdrawal payments
            may include a return of principal, they cannot be considered a
            guaranteed annuity or actual yield of income to the investor. The
            redemption of shares in connection with an Automatic Withdrawal
            Plan may result in a gain or loss for tax purposes. Continued
            withdrawals
 
                                                 November 1, 1998 Prospectus  33
<PAGE>
 
            in excess of income will reduce and possibly exhaust invested
            principal, especially in the event of a market decline. The main-
            tenance of an Automatic Withdrawal Plan concurrently with pur-
            chases of additional shares of the Portfolio would be disadvanta-
            geous to the investor because of the CDSC that may become payable
            on such withdrawals in the case of Class A, Class B or Class C
            shares and because of the initial sales charge in the case of
            Class A shares. For this reason, the minimum investment accepted
            for a Portfolio while an Automatic Withdrawal Plan is in effect
            for that Portfolio is $1,000, and an investor may not maintain a
            plan for the accumulation of shares of the Portfolio (other than
            through reinvestment of distributions) and an Automatic Withdrawal
            Plan at the same time. The Trust or the Distributor may terminate
            or change the terms of the Automatic Withdrawal Plan at any time.
               Because the Automatic Withdrawal Plan may involve invasion of
            capital, investors should consider carefully with their own finan-
            cial advisors whether the plan and the specified amounts to be
            withdrawn are appropriate in their circumstances. The Trust and
            the Distributor make no recommendations or representations in this
            regard.
 
 
REDEMPTIONS The Trust agrees to redeem shares of each Portfolio solely in cash
IN KIND     up to the lesser of $250,000 or 1% of the Portfolio's net assets
            during any 90-day period for any one shareholder. In consideration
            of the best interests of the remaining shareholders, the Trust re-
            serves the right to pay any redemption proceeds exceeding this
            amount in whole or in part by a distribution in kind of securities
            held by a Portfolio in lieu of cash. When shares are redeemed in
            kind, the redeeming shareholder may incur transaction costs upon
            the disposition of the securities received in the distribution.
 
            Distributor and Distribution and Servicing Plans
 
            PIMCO Funds Distributors LLC (the "Distributor"), a wholly owned
            subsidiary of the Adviser, is the principal underwriter of the
            Trust's shares and in that connection makes distribution and ser-
            vicing payments to participating brokers and servicing payments to
            certain banks and other financial intermediaries in connection
            with the sale of Class B and Class C shares and servicing payments
            to participating brokers, certain banks and other financial inter-
            mediaries in connection with the sale of Class A shares. In the
            case of Class A shares, these parties are also compensated based
            on the amount of the front-end sales charge reallowed by the Dis-
            tributor, except in cases where Class A shares are sold without a
            front-end sales charge (although the Distributor may pay brokers
            additional compensation in connection with sales of Class A shares
            without a sales charge). In the case of Class B shares, partici-
            pating brokers and other financial intermediaries are compensated
            by an advance of a sales commission by the Distributor. In the
            case of Class C shares, part or all of the first year's distribu-
            tion and servicing fee is generally paid at the time of sale.
               Pursuant to a Distribution Agreement with the Trust, with re-
            spect to each Portfolio's Class A, Class B and Class C shares, the
            Distributor bears various other promotional and sales related ex-
            penses, including the cost of printing and mailing prospectuses to
            persons other than current shareholders. The Distributor, located
            at 2187 Atlantic Street, Stamford, Connecticut 06902, is a broker-
            dealer registered with the Securities and Exchange Commission.
 
            CLASS A SERVICING FEES As compensation for services rendered and
            expenses borne by the Distributor in connection with personal
            services rendered to Class A shareholders of the Trust and the
            maintenance of Class A shareholder accounts, the Trust pays the
            Distributor servicing fees up to the annual rate of .25% (calcu-
            lated as a percentage of each Portfolio's average daily net assets
            attributable to Class A shares).
 
            CLASS B AND CLASS C DISTRIBUTION AND SERVICING FEES As compensa-
            tion for services rendered and expenses borne by the Distributor
            in connection with the distribution of Class B and Class C shares
            of the Trust, and in connection with personal services rendered to
            Class B and Class C shareholders of the Trust and the maintenance
            of Class B and Class C shareholder accounts, the Trust pays the
            Distributor servicing and distribution fees up to the annual rates
            set
 
34  PIMCO Funds Asset Allocation Series

<PAGE>
 
            forth below (calculated as a percentage of each Portfolio's aver-
            age daily net assets attributable to Class B and Class C shares,
            respectively):
 
 
<TABLE>
<CAPTION>
                           SERVICING DISTRIBUTION
                           FEE       FEE
           --------------------------------------
           <S>             <C>       <C>
           All Portfolios  .25%      .75%
</TABLE>
 
 
               The Class A servicing fees and Class B and Class C distribution
            and servicing fees paid to the Distributor are made under Distri-
            bution and Servicing Plans adopted pursuant to Rule 12b-l under
            the Investment Company Act of 1940, as amended (the "1940 Act"),
            and are of the type known as "compensation" plans. This means
            that, although the Trustees of the Trust are expected to take into
            account the expenses of the Distributor and its predecessors in
            their periodic review of the Distribution and Servicing Plans, the
            fees are payable to compensate the Distributor for services ren-
            dered even if the amount paid exceeds the Distributor's expenses.
               The distribution fee applicable to Class B and Class C shares
            may be spent by the Distributor on any activities or expenses pri-
            marily intended to result in the sale of Class B or Class C
            shares, respectively, including compensation to, and expenses (in-
            cluding overhead and telephone expenses) of, financial consultants
            or other employees of the Distributor or of participating or in-
            troducing brokers who engage in distribution of Class B or Class C
            shares, printing of prospectuses and reports for other than exist-
            ing Class B or Class C shareholders, advertising, and preparation,
            printing and distribution of sales literature. The servicing fee,
            applicable to Class A, Class B and Class C shares of the Trust,
            may be spent by the Distributor on personal services rendered to
            shareholders of the Trust and the maintenance of shareholder ac-
            counts, including compensation to, and expenses (including tele-
            phone and overhead expenses) of, financial consultants or other
            employees of participating or introducing brokers, certain banks
            and other financial intermediaries who aid in the processing of
            purchase or redemption requests or the processing of dividend pay-
            ments, who provide information periodically to shareholders show-
            ing their positions in a Portfolio's shares, who forward communi-
            cations from the Trust to shareholders, who render ongoing advice
            concerning the suitability of particular investment opportunities
            offered by the Trust in light of the shareholders' needs, who re-
            spond to inquiries from shareholders relating to such services, or
            who train personnel in the provision of such services. Distribu-
            tion and servicing fees may also be spent on interest relating to
            unreimbursed distribution or servicing expenses from prior years.
               Many of the Distributor's sales and servicing efforts involve
            the Trust as a whole, so that fees paid by Class A, Class B or
            Class C shares of any Portfolio may indirectly support sales and
            servicing efforts relating to other shares of the same class of
            the Portfolios or other series of the Trust. In reporting its ex-
            penses to the Trustees, the Distributor itemizes expenses that re-
            late to the distribution and/or servicing of a single Portfolio's
            shares, and allocates other expenses among the Portfolios and
            other series of the Trust based on their relative net assets. Ex-
            penses allocated to each Portfolio are further allocated among its
            classes of shares annually based on the relative sales of each
            class, except for any expenses that relate only to the sale or
            servicing of a single class. The Distributor may make payments to
            brokers (and with respect to servicing fees only, to certain banks
            and other financial intermediaries) of up to the following per-
            centages annually of the average daily net assets attributable to
            shares in the accounts of their customers or clients:
 
 
              ALL PORTFOLIOS
 
<TABLE>
<CAPTION>
                          SERVICING DISTRIBUTION
                          FEE       FEE
           -------------------------------------
           <S>            <C>       <C>
           Class A        .25%      N/A
           -------------------------------------
           Class B (/1/)  .25%      None
           -------------------------------------
           Class C (/2/)  .25%      .65%
</TABLE>
 
            1. Payable only with respect to shares outstanding for one year or
            more.
            2. Payable only with respect to shares outstanding for one year or
            more except in the case of shares for which no payment is made to
            the party at the time of sale.
 
                                                 November 1, 1998 Prospectus  35
<PAGE>
 
 
               The Distributor may from time to time pay additional cash bo-
            nuses or other incentives to selected participating brokers in
            connection with the sale or servicing of Class A, Class B and
            Class C shares of the Portfolios. On some occasions, such bonuses
            or incentives may be conditioned upon the sale of a specified min-
            imum dollar amount of the shares of a Portfolio and/or all of the
            Portfolios or other series of the Trust together, or a particular
            class of shares, during a specific period of time. The Distributor
            currently expects that such additional bonuses or incentives will
            not exceed .50% of the amount of any sale. In its capacity as ad-
            ministrator for the Portfolios, PIMCO Advisors may pay participat-
            ing brokers and other intermediaries for sub-transfer agency and
            other services.
               If in any year the Distributor's expenses incurred in connec-
            tion with the distribution of Class B and Class C shares and, for
            Class A, Class B and Class C shares, in connection with the ser-
            vicing of shareholders and the maintenance of shareholder ac-
            counts, exceed the distribution and/or servicing fees paid by the
            Trust, the Distributor would recover such excess only if the Dis-
            tribution and Servicing Plan with respect to such class of shares
            continues to be in effect in some later year when the distribution
            and/or servicing fees exceed the Distributor's expenses. The Trust
            is not obligated to repay any unreimbursed expenses that may exist
            at such time, if any, as the relevant Distribution and Servicing
            Plan terminates.
               From time to time, expenses of principal underwriters incurred
            in connection with the distribution of Class B and Class C shares
            of the Portfolios, and in connection with the servicing of Class
            A, Class B and Class C shareholders of the Portfolios and the
            maintenance of Class A, Class B and Class C shareholder accounts,
            may exceed the distribution and/or servicing fees collected by the
            Distributor.
 
            How Net Asset Value Is Determined
 
            The net asset values of Class A, Class B and Class C shares of
            each Portfolio of the Trust will be determined once on each day on
            which the Exchange is open (a "Business Day"), as of the close of
            regular trading (normally 4:00 p.m., Eastern time) on the Ex-
            change. Net asset value will not be determined on days on which
            the Exchange is closed.
               The market values of the shares of the Underlying Funds held by
            the Portfolios are determined once each Business Day in the same
            manner as the net asset values of the Portfolios' shares are de-
            termined as described below.
               Each Portfolio's liabilities are allocated among its classes.
            The total of such liabilities allocated to a class plus that
            class's distribution and/or servicing fees and any other expenses
            specially allocated to that class are then deducted from the
            class's proportionate interest in the Portfolio's assets, and the
            resulting amount for each class is divided by the number of shares
            of that class outstanding to produce the class's "net asset value"
            per share. Under certain circumstances, the per share net asset
            value of the Class B and Class C shares of the Portfolios that do
            not declare regular income dividends on a daily basis may be lower
            than the per share net asset value of the Class A shares as a re-
            sult of the daily expense accruals of the distribution fee appli-
            cable to the Class B and Class C shares. Generally, for Portfolios
            that pay income dividends, those dividends are expected to differ
            over time by approximately the amount of the expense accrual dif-
            ferential between a particular Portfolio's classes.
 
            Distributions
 
            Shares begin earning dividends on the day after the date that
            funds are received by the Trust for the purchase of Class A, Class
            B and Class C shares. Net investment income from interest and div-
            idends, if any, will be declared and paid to shareholders of rec-
            ord at least monthly by the 30/70 Portfolio, at least quarterly by
            the 60/40 Portfolio and at least annually by the 90/10 Portfolio.
            Any net capital gains from the sale of portfolio securities will
            be distributed no less frequently than once annually. Net short-
            term capital gains may be paid more frequently.
               All dividends and/or distributions will be paid in the form of
            additional shares of the class of shares of the Portfolio to which
            the dividends and/or distributions relate or, at the election of
            the shareholder, of another series of the Trust or PIMCO Funds:
            Pacific Investment Management Series as described below, at net
            asset value, unless the shareholder elects to receive cash (either
            paid to shareholders directly or credited to their account with
            their participat-
 
36  PIMCO Funds Asset Allocation Series

<PAGE>
 
            ing broker). If a shareholder has elected to receive dividends
            and/or capital gain distributions in cash and the postal or other
            delivery service is unable to deliver checks to the shareholder's
            address of record, such shareholder's distributions will automati-
            cally be invested in PIMCO Money Market Fund until such share-
            holder is located. Dividends paid by each Portfolio with respect
            to each class of shares are calculated in the same manner and at
            the same time, but dividends on Class B and Class C shares are ex-
            pected to be lower than dividends on Class A shares as a result of
            the distribution fee applicable to Class B and Class C shares.
            There are no sales charges on reinvested dividends.
               Class A, Class B and Class C shareholders of the Portfolios may
            elect to invest dividends and/or distributions paid by any Portfo-
            lio in shares of the same class of any other series of the Trust
            or PIMCO Funds: Pacific Investment Management Series which offers
            such class of shares at net asset value. The shareholder must have
            an account existing in the PIMCO series selected for investment
            with the identical registered name and address and must elect this
            option on the account application, on a form provided for that
            purpose or by a telephone request to the Transfer Agent at 1-800-
            426-0107. For further information on this option, contact your
            broker or call the Distributor at 1-800-426-0107.
 
            Taxes
 
            Each Portfolio intends to qualify as a regulated investment com-
            pany annually and to elect to be treated as a regulated investment
            company under the Internal Revenue Code of 1986, as amended (the
            "Code"). As such, a Portfolio generally will not pay federal in-
            come tax on the income and gains it pays as dividends to its
            shareholders. In order to avoid a 4% federal excise tax, each
            Portfolio intends to distribute each year substantially all of its
            net income and gains.
 
               Shareholders subject to U.S. federal income tax will be subject
            to tax on dividends received from a Portfolio, regardless of
            whether received in cash or reinvested in additional shares. Dis-
            tributions received by tax-exempt shareholders will not be subject
            to federal income tax to the extent permitted under applicable tax
            law. All shareholders must treat dividends, other than capital
            gain dividends and dividends that represent a return of capital to
            shareholders, as ordinary income. In particular, distributions de-
            rived from short-term gains will be treated as ordinary income.
            Dividends designated by a Portfolio as capital gain dividends de-
            rived from the Portfolio's net capital gains (that is, the excess
            of its net long-term capital gains over its net short-term capital
            losses) are taxable to shareholders as long-term capital gain
            (generally subject to a 20% tax rate) except as provided by an ap-
            plicable tax exemption. Any distributions that are not from a
            Portfolio's net investment income or net capital gain may be char-
            acterized as a return of capital to shareholders or, in some
            cases, as capital gain. Certain dividends declared in October, No-
            vember or December of a calendar year are taxable to shareholders
            (who otherwise are subject to tax on dividends) as though received
            on December 31 of that year if paid to shareholders during January
            of the following calendar year. Each Portfolio will advise share-
            holders annually of the amount and nature of the dividends paid to
            them.
               Taxable shareholders should note that the timing of their in-
            vestment or redemptions could have undesirable tax consequences.
            Dividends and distributions on a Portfolio's shares are generally
            subject to federal income tax as described herein to the extent
            they do not exceed the Portfolio's realized income and gains, even
            though such dividends and distributions may economically represent
            a return of a particular shareholder's investment. Such distribu-
            tions are likely to occur in respect of shares purchased at a time
            when the Portfolio's net asset value reflects gains that are ei-
            ther unrealized, or realized but not distributed. Such realized
            gains may be required to be distributed even when a Portfolio's
            net asset value also reflects unrealized losses.
               A Portfolio's use of a fund-of-funds structure could affect the
            amount, timing and character of distributions to shareholders. See
            "Taxation" in the Statement of Additional Information.
               The preceding discussion relates only to federal income tax;
            the consequences under other tax laws may differ. Shareholders
            should consult their tax advisers as to the possible application
            of foreign, state and local income tax laws to Trust dividends and
            capital gain distributions. For additional information relating to
            the tax aspects of investing in a Portfolio, see the Statement of
            Additional Information.
 
                                                 November 1, 1998 Prospectus  37
<PAGE>
 
 
            Management of the Portfolios
 
            The business affairs of the Trust are managed under the direction
            of the Board of Trustees. Information about the Trustees and the
            Trust's executive officers may be found in the Statement of Addi-
            tional Information under the heading "Management of the Trust."
 
 
INVESTMENT  PIMCO ADVISORS serves as investment adviser to the Portfolios pur-
ADVISER     suant to an investment advisory agreement with the Trust. PIMCO
            Advisors is a Delaware limited partnership organized in 1987.
            PIMCO Advisors provides investment management and advisory serv-
            ices to private accounts of institutional and individual clients
            and to mutual funds. Total assets under management by PIMCO Advi-
            sors and its subsidiary partnerships as of September 30, 1998 were
            approximately $225.9 billion. The general partners of PIMCO Advi-
            sors are PIMCO Partners, G.P. and PIMCO Advisors Holdings L.P.
            ("PAH"). PIMCO Partners, G.P. is a general partnership between
            PIMCO Holding LLC, a Delaware limited liability company and an in-
            direct wholly-owned subsidiary of Pacific Life Insurance Company,
            and PIMCO Partners LLC, a California limited liability company
            controlled by the current Managing Directors and two former Manag-
            ing Directors of Pacific Investment Management. PIMCO Partners,
            G.P. is the sole general partner of PAH. PIMCO Advisors is gov-
            erned by a Management Board, which exercises substantially all of
            the governance powers of the general partner and serves as the
            functional equivalent of a board of directors. PIMCO Advisors' ad-
            dress is 800 Newport Center Drive, Newport Beach, California
            92660. PIMCO Advisors is registered as an investment adviser with
            the Securities and Exchange Commission. PIMCO Advisors currently
            has seven subsidiary investment adviser partnerships, the follow-
            ing six of which manage one or more of the Underlying Funds:
            Blairlogie, Cadence, Columbus Circle, NFJ, Pacific Investment Man-
            agement and Parametric. On or before March 31, 1999, it is antici-
            pated that PIMCO Advisers will sell substantially all of its own-
            ership interest in Blairlogie. See "Portfolio Managers for the Un-
            derlying Funds--Blairlogie" below.
               PIMCO Advisors' Asset Allocation Committee is responsible for
            determining how the Portfolios' assets are allocated and reallo-
            cated from time to time among the Underlying Funds. Individuals
            who determine general investment advice and constitute the Asset
            Allocation Committee for PIMCO Advisors are William D. Cvengros,
            Timothy R. Clark, Robert S. Venable, David Young and Edward P.
            Rennie.
               William D. Cvengros is the Chief Executive Officer, President
            and a Member of the Management Board of PIMCO Advisors and a
            Trustee of the Trust. He was formerly President of the Trust and a
            Director and the Vice Chairman and Chief Investment Officer of Pa-
            cific Life Insurance Company. He received a B.A. in Economics from
            the University of Notre Dame and an M.B.A. from Northwestern Uni-
            versity and he is a Chartered Financial Analyst. Timothy R. Clark
            is a Vice President of PIMCO Advisors and a Senior Vice President
            of the Distributor. He previously served as President of Katonah
            Capital Management, Inc. Prior to that, he was with Zweig Advisors
            Inc. and its affiliates serving in various capacities, including
            portfolio manager for various open- and closed-end funds. He re-
            ceived a B.A. in Economics from Harvard University and an M.B.A.
            from New York University. Robert S. Venable is a Vice President of
            PIMCO Advisors. He previously served as a Vice President and port-
            folio manager at Pacific Investment Management. Mr. Venable has a
            B.S. from the University of California, Berkeley and an M.B.A.
            from the Wharton School of Business and he is a Chartered Finan-
            cial Analyst. David Young is a Vice President in Account Manage-
            ment at Pacific Investment Management. Previously, he was a Vice
            President--Client Relations and Marketing of a former division of
            PIMCO Advisors, a Director--Client Relations with Pacific Finan-
            cial Asset Management Company and a Vice President and portfolio
            manager with Analytic Investment Management, Inc. He received a
            B.A. in Economics and Political Science and an M.B.A. from the
            University of California, Irvine and he is a Chartered Financial
            Analyst. Edward P. Rennie is a Senior Vice President and Regional
            Manager of Pacific Investment Management in Singapore. Previously,
            he was a Vice President and Director of New Product Services at
            Pacific Investment Management or its predecessor. He received a
            B.S. in Engineering from Drexel University and he is a Chartered
            Financial Analyst.
               Under the investment advisory agreement, PIMCO Advisors, sub-
            ject to the supervision of the Board of Trustees, is responsible
            for providing advice and guidance with respect to the Portfolios
            and for managing, either directly or
 
38  PIMCO Funds Asset Allocation Series

<PAGE>
 
            through others selected by the Adviser, the investment of the
            Portfolios. PIMCO Advisors also furnishes to the Board of Trustees
            periodic reports on the investment performance of each Portfolio.
 
 
PORTFOLIO   Pursuant to portfolio management agreements, PIMCO Advisors em-
MANAGERS    ploys Portfolio Managers to manage the portfolios of all of the
FOR THE     Underlying Stock Funds with the exception of PIMCO StocksPLUS
UNDERLYING  Fund, for which Pacific Investment Management serves as investment
FUNDS       adviser and Portfolio Manager. Pacific Investment Management also
            serves as investment adviser and Portfolio Manager of each Under-
            lying Bond Fund. The Portfolio Managers have full investment dis-
            cretion and make all determinations with respect to the investment
            of the assets of the Underlying Funds they manage. If a Portfolio
            Manager ceases to manage the portfolio of an Underlying Stock Fund
            for which PIMCO Advisors serves as adviser, PIMCO Advisors will
            either assume full responsibility for the management of that Fund,
            or retain a new portfolio manager subject to the approval of the
            Trustees and the shareholders of the Fund.
 
            PACIFIC INVESTMENT MANAGEMENT manages each Underlying Bond Fund
            and PIMCO StocksPLUS Fund, each of which is a series of PIMCO
            Funds: Pacific Investment Management Series. Pacific Investment
            Management is an investment management firm organized as a general
            partnership. Pacific Investment Management has two partners: PIMCO
            Advisors as the supervisory partner, and PIMCO Management, Inc. as
            the managing partner. Pacific Investment Management Company, the
            predecessor investment adviser to Pacific Investment Management,
            commenced operations in 1971. Pacific Investment Management had
            approximately $148.1 billion of assets under management as of Sep-
            tember 30, 1998. Pacific Investment Management's address is 840
            Newport Center Drive, Suite 300, Newport Beach, California 92660.
            Pacific Investment Management is registered as an investment ad-
            viser with the Securities and Exchange Commission and as a commod-
            ity trading adviser with the CFTC.
               Pacific Investment Management specializes in all sectors of the
            fixed income market using its total return philosophy--seeking
            both yield and capital appreciation. Pacific Investment Manage-
            ment's total return philosophy revolves around the principle of
            diversification and that no single risk should dominate returns.
            By diversifying strategies, or relying on multiple sources of val-
            ue, Pacific Investment Management attempts to generate a solid
            track record with a high degree of consistency. Pacific Investment
            Management seeks to add value through the use of "top down" strat-
            egies such as its exposure to interest rates, or duration, chang-
            ing volatility, yield curve positioning and sector rotation. "Bot-
            tom up" strategies are also employed involving analysis and selec-
            tion of specific securities.
 
            COLUMBUS CIRCLE manages PIMCO Renaissance, Core Equity, Mid-Cap
            Equity, International Growth, and Innovation Funds (the "Columbus
            Circle Funds"). Columbus Circle is an investment management firm
            organized as a general partnership. Columbus Circle has two part-
            ners: PIMCO Advisors as the supervisory partner, and Columbus Cir-
            cle Investors Management Inc. as the managing partner. Columbus
            Circle Investors Division of Thomson Advisory Group L.P. ("TAG"),
            the predecessor investment adviser to Columbus Circle, commenced
            operations in 1975. Accounts managed by Columbus Circle had com-
            bined assets as of September 30, 1998 of approximately $7.8 bil-
            lion. Columbus Circle's address is Metro Center, One Station
            Place, 8th Floor, Stamford, Connecticut 06902. Columbus Circle is
            registered as an investment adviser with the Securities and Ex-
            change Commission.
               At the center of Columbus Circle's equity investment strategy
            is its theory of Positive Momentum & Positive Surprise. This the-
            ory asserts that a good company doing better than generally ex-
            pected will experience a rise in its stock price, and conversely,
            a company falling short of expectations will experience a drop in
            its stock price. Based on this theory, Columbus Circle attempts to
            manage the Columbus Circle Funds with a view to investing in grow-
            ing companies that are surprising the market with business results
            that are better than anticipated.
 
            CADENCE manages PIMCO Capital Appreciation, Mid-Cap Growth, Small-
            Cap Growth, and Micro-Cap Growth Funds (the "Cadence Funds"). Ca-
            dence is an investment management firm organized as a general
            partnership. Cadence has two partners: PIMCO Advisors as the su-
            pervisory partner, and Cadence Capital Management Inc. as the man-
            aging partner. Cadence Capital Management Corporation, the prede-
            cessor investment adviser to Cadence, commenced operations in
            1988. Accounts managed by Cadence had combined assets as of Sep-
            tember 30, 1998 of
 
                                                 November 1, 1998 Prospectus  39
<PAGE>
 
            approximately $6.1 billion. Cadence's address is Exchange Place,
            53 State Street, Boston, Massachusetts 02109. Cadence is regis-
            tered as an investment adviser with the Securities and Exchange
            Commission.
               Cadence utilizes an equity investment strategy that focuses on
            both growth (evaluating securities on the basis of their potential
            earnings growth) and value (evaluating securities based on their
            price) characteristics, and attempts to identify reasonably priced
            securities that offer rapid prospective earnings growth potential.
            Cadence utilizes a quantitative screening process in selecting
            stocks. Distinct computerized models are used to screen and rank
            each issue in a selected universe according to growth and price
            considerations. Cadence believes that the models identify the
            stocks in the universe exhibiting growth characteristics with rea-
            sonable valuations. Stocks are then selected for a portfolio using
            qualitative research, and are replaced when they score worse-than-
            median screen ranks, have negative earnings surprises or show poor
            relative performance. The universes are rescreened frequently to
            obtain a favorable composition of growth and value characteristics
            for the Cadence Funds.
 
            NFJ manages PIMCO Equity Income, Value, Value 25, and Small-Cap
            Value Funds (the "NFJ Funds"). NFJ is an investment management
            firm organized as a general partnership. NFJ has two partners:
            PIMCO Advisors as the supervisory partner, and NFJ Management Inc.
            as the managing partner. NFJ Investment Group, Inc., the predeces-
            sor investment adviser to NFJ, commenced operations in 1989. Ac-
            counts managed by NFJ had combined assets as of September 30, 1998
            of approximately $2.2 billion. NFJ's address is 2121 San Jacinto,
            Suite 1840, Dallas, Texas 75201. NFJ is registered as an invest-
            ment adviser with the Securities and Exchange Commission.
               In managing the NFJ Funds, NFJ uses a value-based philosophy
            and investment process. NFJ adheres to the traditional value phi-
            losophy that stocks priced lower than the true value of the issu-
            ing company will increase in value, but differs from many value
            managers by also considering industry diversification and the ben-
            efits it affords a portfolio. NFJ classifies stock universes by
            industry and according to market capitalization. Stocks are se-
            lected from a universe using screening processes that focus on low
            P/E ratios and/or high yields within each industry, subject to
            quality and price momentum screens. Although quarterly rebalancing
            is a general rule, NFJ will replace stocks when an alternate stock
            within the same industry has a significantly better characteris-
            tics than the current NFJ Fund holdings.
 
            BLAIRLOGIE manages PIMCO International Fund. Blairlogie is an in-
            vestment management firm, organized as a limited partnership under
            the laws of the United Kingdom, with two general partners and one
            limited partner. Currently, the general partners are PIMCO Advi-
            sors, which serves as the supervisory partner, and Blairlogie
            Holdings Limited, a wholly owned subsidiary of PIMCO Advisors,
            which serves as the managing partner. Blairlogie Capital Manage-
            ment Ltd., the predecessor investment adviser to Blairlogie, com-
            menced operations in 1992. Accounts managed by Blairlogie had com-
            bined assets as of September 30, 1998 of approximately $700 mil-
            lion. Blairlogie's address is 4th Floor, 125 Princes Street, Edin-
            burgh EH2 4AD, Scotland. Blairlogie is registered as an investment
            adviser with the Securities and Exchange Commission in the United
            States and with the Investment Management Regulatory Organisation
            in the United Kingdom.
               Blairlogie has more than 50 years of experience in the highly
            specialized field of international investing. Its investment phi-
            losophy combines traditional Scottish standards of prudent invest-
            ment management with modern quantitative analytical tools. In man-
            aging PIMCO International Fund, Blairlogie employs sophisticated
            analytical tools to attain specific information on each country
            considered for investment and conducts personal visits to numerous
            geographical regions, using the information to determine country
            allocations. It then selects what it believes to be the best
            stocks within each country according to growth, quality and value
            characteristics. Through continued monitoring, sell decisions are
            influenced by changes in country weightings or changes in a par-
            ticular security's attractiveness.
               It is anticipated that PIMCO Advisors will sell substantially
            all of its ownership interest in Blairlogie to Alleghany Asset
            Management, Inc. on or before March 31, 1999 (the "Blairlogie
            Transaction"). The Blairlogie Transaction is subject to a number
            of conditions. PIMCO Advisors has determined to terminate its
            portfolio management agreement with Blairlogie with respect to the
            International Fund, effective on or about the date of the
            Blairlogie Transaction. Under the Trust's investment advisory
            agreement, PIMCO Advisors would then assume full responsibil-
 
40  PIMCO Funds Asset Allocation Series

<PAGE>
 
            ity for managing the International Fund's portfolio. This Prospec-
            tus will be supplemented or revised if these events do not occur
            substantially in accordance with the schedule outlined above.
 
            PARAMETRIC manages PIMCO Enhanced Equity, Tax-Efficient Equity,
            Structured Emerging Markets, and Tax-Efficient Structured Emerging
            Markets Funds (the "Parametric Funds"). Parametric is an invest-
            ment management firm organized as a general partnership. Paramet-
            ric has two partners: PIMCO Advisors as the supervisory partner,
            and Parametric Management Inc. as the managing partner. Parametric
            Portfolio Associates, Inc., the predecessor investment adviser to
            Parametric, commenced operations in 1987. Accounts managed by Par-
            ametric had combined assets as of September 30, 1998 of approxi-
            mately $2.8 billion. Parametric's address is 7310 Columbia Center,
            701 Fifth Avenue, Seattle, Washington 98104-7090. Parametric is
            registered as an investment adviser with the SEC and as a commod-
            ity trading adviser with the CFTC.
               Parametric has developed a structured, long-term investment
            process that combines quantitatively-driven fundamental analysis
            and economic methods. Parametric attempts to build risk-controlled
            portfolios of equity securities that are both reasonably priced
            and poised to benefit from investor sentiment by combining its un-
            derstanding of the financial markets and investment behavior with
            extensive quantitative research and modeling. This investment phi-
            losophy is applied for each Parametric Fund, including those with
            an emerging markets or tax-efficient focus.
 
 
FUND
ADMINISTRATOR
            PIMCO Advisors also serves as administrator (the "Administrator")
            for the Portfolios' Class A, Class B and Class C shares pursuant
            to an administration agreement with the Trust. The Administrator
            provides or procures administrative services for Class A, Class B
            and Class C shareholders of the Portfolios, which include clerical
            help and accounting, bookkeeping, internal audit services and cer-
            tain other services required by the Portfolios, and preparation of
            reports to the Portfolios' shareholders and regulatory filings.
            The Administrator has retained Pacific Investment Management to
            provide such services as sub-administrator. The Administrator
            and/or the sub-administrator may also retain other affiliates to
            provide certain of these services. In addition, the Administrator,
            at its own expense, arranges for the provision of legal, audit,
            custody, transfer agency (including sub-transfer agency and other
            administrative services) and other services necessary for the or-
            dinary operation of the Portfolios, and is responsible for the
            costs of registration of the Trust's shares and the printing of
            prospectuses and shareholder reports for current shareholders.
               The Portfolios (and not the Administrator) are responsible for
            the following expenses: (i) salaries and other compensation of any
            of the Trust's executive officers and employees who are not offi-
            cers, directors, stockholders, or employees of PIMCO Advisors, Pa-
            cific Investment Management, or their subsidiaries or affiliates;
            (ii) taxes and governmental fees; (iii) brokerage fees and commis-
            sions and other portfolio transaction expenses; (iv) the costs of
            borrowing money, including interest expenses; (v) fees and ex-
            penses of the Trustees who are not "interested persons" of the Ad-
            viser, any Portfolio Manager, or the Trust, and any counsel re-
            tained exclusively for their benefit; (vi) extraordinary expenses,
            including costs of litigation and indemnification expenses; (vii)
            expenses which are capitalized in accordance with generally ac-
            cepted accounting principles; and (viii) any expenses allocated or
            allocable to a specific class of shares, which include distribu-
            tion and/or service fees payable with respect to Class A, Class B
            and Class C shares, and may include certain other expenses as per-
            mitted by the Trust's Multiple Class Plan adopted pursuant to Rule
            18f-3 under the 1940 Act, subject to review and approval by the
            Trustees. The Portfolios also indirectly pay their proportionate
            share of the expenses of the Underlying Funds (including advisory
            and administrative fees) in which they invest. See "Underlying
            Fund Expenses" below.
 
                                                 November 1, 1998 Prospectus  41
<PAGE>
 
ADVISORY    The Portfolios do not pay any fees to PIMCO Advisors under the
FEES        Trust's investment advisory agreement in return for the advisory
            and asset allocation services provided by PIMCO Advisors. The
            Portfolios do, however, indirectly pay a proportionate share of
            the advisory fees paid to PIMCO Advisors and Pacific Investment
            Management by the Underlying Funds in which the Portfolios invest.
            See "Underlying Fund Expenses" below.
 
 
ADMINISTRATIVE
FEES
            The Portfolios feature fixed administrative fees. For providing or
            procuring administrative services to the Portfolios as described
            above, the Administrator receives monthly fees from each Portfolio
            at the annual rate of 0.40% based on the average daily net assets
            attributable in the aggregate to the Portfolio's Class A, Class B
            and Class C shares up to and including $2.5 billion, and .35%
            based on such net assets in excess of $2.5 billion. The Portfolios
            also indirectly pay a proportionate share of the administrative
            fees charged by PIMCO Advisors and Pacific Investment Management
            to the Underlying Funds in which the Portfolios invest. See "Un-
            derlying Fund Expenses" below. The administration and sub-
            administration agreements for the Portfolios may be terminated by
            the Trustees, or by PIMCO Advisors or Pacific Investment Manage-
            ment (as the case may be) on 60 days' written notice. Following
            their initial terms, the agreements will continue from year-to-
            year if approved by the Trustees.
 
 
UNDERLYING  The expenses associated with investing in a "fund of funds," such
FUND        as the Portfolios, are generally higher than those for mutual
EXPENSES    funds that do not invest primarily in other mutual funds. This is
            because shareholders in a "fund of funds" indirectly pay a portion
            of the fees and expenses charged at the underlying fund level.
               The Trust has structured the Portfolios to reduce expenses in-
            curred at the Underlying Fund level as follows: (a) the Portfolios
            do not pay any fees for asset allocation or advisory services un-
            der the Trust's investment advisory agreement; and (b) the Portfo-
            lios invest in Institutional Class shares of the Underlying Funds,
            which are not subject to any sales charges or 12b-1 fees.
               The table on the following page sets forth annual advisory fee
            and total operating expense information for Institutional Class
            shares of the Underlying Funds. Shareholders of each Portfolio in-
            directly bear a proportionate share of these expenses depending
            upon how the Portfolio's assets are allocated from time to time
            among the Underlying Funds. See "Schedule of Fees."
 

42  PIMCO Funds Asset Allocation Series
<PAGE>
 
<TABLE>
<CAPTION>
                                      ANNUAL UNDERLYING FUND EXPENSES
                                      (Based on the average daily net assets
                                      attributable to a Fund's Institutional
                                      Class shares):
                                      ADVISORY ADMINI-       TOTAL FUND
           UNDERLYING FUND            FEES     STRATIVE FEES OPERATING EXPENSES
           --------------------------------------------------------------------
           <S>                        <C>      <C>           <C>
           PIMCO Equity Income        0.45%    0.25%         0.70%
           --------------------------------------------------------------------
           PIMCO Renaissance          0.60     0.25          0.85
           --------------------------------------------------------------------
           PIMCO Core Equity          0.57     0.25          0.82
           --------------------------------------------------------------------
           PIMCO Mid-Cap Equity       0.63     0.25          0.88
           --------------------------------------------------------------------
           PIMCO Value                0.45     0.25          0.70
           --------------------------------------------------------------------
           PIMCO Value 25             0.50     0.25          0.75
           --------------------------------------------------------------------
           PIMCO Capital
            Appreciation              0.45     0.25          0.70
           --------------------------------------------------------------------
           PIMCO Mid-Cap Growth       0.45     0.25          0.70
           --------------------------------------------------------------------
           PIMCO Enhanced Equity      0.45     0.25          0.70
           --------------------------------------------------------------------
           PIMCO Tax-Efficient
            Equity                    0.45     0.25          0.70
           --------------------------------------------------------------------
           PIMCO Small-Cap Value      0.60     0.25          0.85
           --------------------------------------------------------------------
           PIMCO Small-Cap Growth     1.00     0.25          1.25
           --------------------------------------------------------------------
           PIMCO Micro-Cap Growth     1.25     0.25          1.50
           --------------------------------------------------------------------
           PIMCO International        0.55     0.50          1.05
           --------------------------------------------------------------------
           PIMCO International
            Growth                    0.85     0.50          1.35
           --------------------------------------------------------------------
           PIMCO Structured Emerging
            Markets                   0.45     0.50          0.95
           --------------------------------------------------------------------
           PIMCO Tax-Efficient
            Structured Emerging
            Markets                   0.45     0.50          0.95
           --------------------------------------------------------------------
           PIMCO Innovation           0.65     0.25          0.90
           --------------------------------------------------------------------
           PIMCO StocksPLUS           0.40     0.25          0.65
           --------------------------------------------------------------------
           PIMCO Money Market         0.15     0.20          0.35
           --------------------------------------------------------------------
           PIMCO Short-Term           0.25     0.20          0.45
           --------------------------------------------------------------------
           PIMCO Low Duration         0.25     0.18          0.43
           --------------------------------------------------------------------
           PIMCO Moderate Duration    0.25     0.20          0.45
           --------------------------------------------------------------------
           PIMCO Real Return Bond     0.25     0.25          0.50
           --------------------------------------------------------------------
           PIMCO Total Return         0.25     0.18          0.43
           --------------------------------------------------------------------
           PIMCO Total Return II      0.25     0.25          0.50
           --------------------------------------------------------------------
           PIMCO High Yield           0.25     0.25          0.50
           --------------------------------------------------------------------
           PIMCO Long-Term U.S.
            Government                0.25     0.25          0.50
           --------------------------------------------------------------------
           PIMCO Global Bond          0.25     0.30          0.55
           --------------------------------------------------------------------
           PIMCO Foreign Bond         0.25     0.25          0.50
           --------------------------------------------------------------------
           PIMCO Emerging Markets
            Bond                      0.45     0.40          0.85
</TABLE>
 
            Description of the Trust
 
CAPITALIZATION
            The Trust was organized as a Massachusetts business trust on Au-
            gust 24, 1990, and currently consists of twenty-eight portfolios
            that are operational, three of which are described in this Pro-
            spectus. Other portfolios may be offered by means of a separate
            prospectus. The Board of Trustees may establish additional portfo-
            lios in the future. The capitalization of the Trust consists of an
            unlimited number of shares of beneficial interest. When issued,
            shares of the Trust are fully paid, non-assessable and freely
            transferable.
 
               Under Massachusetts law, shareholders could, under certain cir-
            cumstances, be held liable for the obligations of the Trust. How-
            ever, the Trust's Second Amended and Restated Agreement and Decla-
            ration of Trust (the "Declaration of Trust") disclaims shareholder
            liability for acts or obligations of the Trust and requires that
            notice of such
 
                                                 November 1, 1998 Prospectus  43
<PAGE>
 
            disclaimer be given in each agreement, obligation or instrument
            entered into or executed by the Trust or the Trustees. The Decla-
            ration of Trust also provides for indemnification out of a Portfo-
            lio's property for all loss and expense of any shareholder of that
            Portfolio held liable on account of being or having been a share-
            holder. Thus, the risk of a shareholder incurring financial loss
            on account of shareholder liability is limited to circumstances in
            which such disclaimer is inoperative or the Portfolio of which he
            or she is or was a shareholder is unable to meet its obligations,
            and thus should be considered remote.
 
 
MULTIPLE    Class A, Class B and Class C shares of each Portfolio represent
CLASSES OF  interests in the assets of that Portfolio, and each class has
SHARES      identical dividend, liquidation and other rights and the same
            terms and conditions, except that expenses related to the distri-
            bution and shareholder servicing of Class A, Class B and Class C
            shares are borne solely by such class and each class may, at the
            Trustees' discretion, also pay a different share of other ex-
            penses, not including advisory or custodial fees or other expenses
            related to the management of the Trust's assets, if these expenses
            are actually incurred in a different amount by that class, or if
            the class receives services of a different kind or to a different
            degree than the other classes. All other expenses are allocated to
            each class on the basis of the net asset value of that class in
            relation to the net asset value of the particular Portfolio.
 
 
VOTING      Each class of shares of each Portfolio has identical voting
            rights, except that each class of shares has exclusive voting
            rights on any matter submitted to shareholders that relates solely
            to that class, and has separate voting rights on any matter sub-
            mitted to shareholders in which the interests of one class differ
            from the interests of any other class. Each class of shares has
            exclusive voting rights with respect to matters pertaining to any
            Distribution and Servicing Plan or agreement applicable only to
            that class. These shares are entitled to vote at meetings of
            shareholders. Matters submitted to shareholder vote must be ap-
            proved by each Portfolio separately except (i) when required by
            the 1940 Act shares shall be voted together and (ii) when the
            Trustees have determined that the matter does not affect all Port-
            folios, then only shareholders of the Portfolio or Portfolios af-
            fected shall be entitled to vote on the matter. All classes of
            shares of a Portfolio will vote together, except with respect to a
            Distribution and Servicing Plan or agreement applicable to a class
            of shares or when a class vote is required as specified above or
            otherwise by the 1940 Act. Shares are freely transferable, are en-
            titled to dividends as declared by the Trustees and, in liquida-
            tion of the Trust, are entitled to receive the net assets of their
            Portfolio, but not of the other Portfolios or other series of the
            Trust. The Trust does not generally hold annual meetings of share-
            holders and will do so only when required by law. Shareholders may
            remove Trustees from office by votes cast in person or by proxy at
            a meeting of shareholders or by written consent. Such a meeting
            will be called at the written request of the holders of 10% of the
            Trust's outstanding shares.
               Shares entitle their holders to one vote per share (with pro-
            portionate voting for fractional shares). As of October 13, 1998
            the following were shareholders of record of at least 25% of the
            outstanding voting securities of the indicated Portfolios: PIMCO
            Advisors L.P. (Newport Beach, California), the Trust's investment
            adviser and administrator, with respect to each of the 90/10,
            60/40 and 30/70 Portfolios. As used in this Prospectus, the phrase
            "vote of a majority of the outstanding shares" of a Portfolio (or
            the Trust) means the vote of the lesser of: (1) 67% of the shares
            of the Portfolio (or the Trust) present at a meeting, if the hold-
            ers of more than 50% of the outstanding shares are present in per-
            son or by proxy; or (2) more than 50% of the outstanding shares of
            the Portfolio (or the Trust).
 
            Mailings to Shareholders
 
            To reduce the volume of mail shareholders receive, it is antici-
            pated that only one copy of most Trust reports, such as the
            Trust's annual reports, will be mailed to a shareholder's house-
            hold (same surname, same address). A shareholder may call 1-800-
            426-0107 if additional shareholder reports are desired.
 
44  PIMCO Funds Asset Allocation Series

<PAGE>
 
PIMCO FUNDS ASSET ALLOCATION SERIES
Actively managed portfolios of select PIMCO Funds

<TABLE> 
<S>                                 <C>                                <C> 
Investment Adviser and              Shareholder Servicing Agent        For further information
Administrator                       and Transfer Agent                 about PIMCO Funds Asset
PIMCO Advisors L.P.                 Shareholder Services, Inc.         Allocation Series, call
800 Newport Center Drive            P.O. Box 5866                      1-800-426-0107 or visit
Newport Beach, CA 92660             Denver, CO 80217                   our Web site at
                                                                       www.pimcofunds.com.
Distributor                         Independent Accountants
PIMCO Funds Distributors LLC        PricewaterhouseCoopers LLP
2187 Atlantic Street                1055 Broadway
Stamford, CT 06902                  Kansas City, MO 64105

Custodian                           Legal Counsel
Investors Fiduciary Trust           Ropes & Gray
Company                             One International Place
801 Pennsylvania                    Boston, MA 02110
Kansas City, MO 64105
</TABLE> 


                                                                           PIMCO
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PZ008.11/98







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