PIMCO FUNDS MULTI MANAGER SERIES
497, 2000-04-13
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<PAGE>

                   PIMCO FUNDS PROSPECTUS




                 ---------------------------------------------------------------
PIMCO Funds      NFJ INVESTMENT GROUP                   NFJ Value 25 Fund
Multi-Manager    NFJ Equity Income Fund
Series           NFJ Value Fund

April 12, 2000

Share Classes

 .  Institutional

 .  Administrative





This cover is not part of the Prospectus               [PIMCO LOGO APPEARS HERE]
<PAGE>

                 Prospectus

PIMCO            This Prospectus describes three mutual funds offered by PIMCO
Funds:           Funds: Multi-Manager Series. The Funds provide access to the
Multi-           professional investment advisory services offered by PIMCO
Manager          Advisors L.P. and its affiliate, NFJ Investment Group.
Series


April 12, 2000   This Prospectus explains what you should know about the Funds
                 before you invest. Please read it carefully.

Share            The Securities and Exchange Commission has not approved or
Classes          disapproved these securities or determined if this Prospectus
Institutional    is truthful or complete. Any representation to the contrary is
and              a criminal offense.
Administrative

1  PIMCO Funds: Multi-Manager Series
<PAGE>

            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summaries
           NFJ Equity Income Fund.........................................   5
           NFJ Value Fund.................................................   7
           NFJ Value 25 Fund..............................................   9
         Summary of Principal Risks.......................................  11
         Management of the Funds..........................................  13
         Investment Options -- Institutional Class and Administrative
          Class Shares....................................................  15
         Purchases, Redemptions and Exchanges.............................  16
         How Fund Shares Are Priced.......................................  20
         Fund Distributions...............................................  21
         Tax Consequences.................................................  21
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  22
         Financial Highlights.............................................  26
</TABLE>

                                                                   Prospectus 2
<PAGE>

            Summary Information


 The table below lists the investment objectives and certain investment
 characteristics of the Funds. Other important characteristics are described
 in the individual Fund Summaries beginning on page 5.

<TABLE>
<CAPTION>
                                                                                                Approximate
                                                                                                Number of
  Sub-Adviser     Fund           Investment Objective    Main Investments                       Holdings
 ----------------------------------------------------------------------------------------------------------
  <S>             <C>            <C>                     <C>                                    <C>
  NFJ Investment  NFJ Equity     Current income as a     Income producing common stocks of         40-50
  Group           Income         primary objective;      companies with market capitalizations
                                 long-term growth of     of more than $2 billion
                                 capital as a secondary
                                 objective
             ----------------------------------------------------------------------------------------------
                  NFJ Value      Long-term growth of     Common stocks of companies with market     40
                                 capital and income      capitalizations of more than $2
                                                         billion that are undervalued relative
                                                         to the market and their industry
                                                         groups
             ----------------------------------------------------------------------------------------------
                  NFJ Value 25   Long-term growth of     Approximately 25 common stocks of          25
                                 capital and income      companies with market capitalizations
                                                         of between $1 billion and $5 billion
                                                         and below-average price-to-earnings
                                                         ratios relative to their industry
                                                         groups
 ----------------------------------------------------------------------------------------------------------
</TABLE>

Fund           The following Fund Summaries identify each Fund's investment
Descriptions,  objective, principal investments and strategies, principal risks,
Performance    performance information and fees and expenses. A more detailed
and Fees       "Summary of Principal Risks" describing principal risks of
               investing in the Funds begins after the Fund Summaries.

               It is possible to lose money on investments in the Funds. An
               investment in a Fund is not a deposit of a bank and is not
               insured or guaranteed by the Federal Deposit Insurance
               Corporation or any other government agency.


3 PIMCO Funds: Multi-Manager Series
<PAGE>




                      (This page intentionally left blank)

                                                                   Prospectus 4
<PAGE>

            NFJ Equity Income Fund

- -------------------------------------------------------------------------------
Principal     Investment ObjectiveFund Focus              Approximate
Investments   Seeks current       Income producing        Capitalization
and           income as a         common stocks           Range
Strategies    primary             with potential          More than $2
              objective, and      for capital             billion
              long-term growth    appreciation
              of capital as a
              secondary           Approximate             Dividend
              objective           Number of               Frequency
                                  Holdings                Quarterly
                                  40-50


            The Fund seeks to achieve its investment objective by normally
            investing at least 65% of its assets in income-producing (e.g.,
            dividend-paying) common stocks of companies with market
            capitalizations of more than $2 billion at the time of investment.

             The Fund's initial selection universe consists of the 1,000
            largest publicly traded companies (in terms of market
            capitalization) in the U.S. The portfolio managers classify the
            universe by industry. They then identify the most undervalued
            stocks in each industry based mainly on relative P/E ratios,
            calculated both with respect to trailing operating earnings and
            forward earnings estimates. From this group of stocks, the Fund
            buys approximately 25 stocks with the highest dividend yields. The
            portfolio managers then screen the most undervalued companies in
            each industry by dividend yield to identify the highest yielding
            stocks in each industry. From this group, the Fund buys
            approximately 25 additional stocks with the lowest P/E ratios.

             In selecting stocks, the portfolio managers consider quantitative
            factors such as price momentum (based on changes in stock price
            relative to changes in overall market prices), earnings momentum
            (based on analysts' earnings per share estimates and revisions to
            those estimates), relative dividend yields, valuation relative to
            the overall market and trading liquidity. The portfolio managers
            may replace a stock when a stock within the same industry group
            has a considerably higher dividend yield or lower valuation than
            the Fund's current holding.

             Under normal circumstances, the Fund intends to be fully invested
            in common stocks (aside from certain cash management practices).
            The Fund may temporarily hold up to 10% of its assets in cash and
            cash equivalents for defensive purposes in response to unfavorable
            market and other conditions. This would be inconsistent with the
            Fund's investment objective and principal strategies.

- -------------------------------------------------------------------------------
Principal   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              . Market Risk          . Value Securities Risk . Management Risk
              . Issuer Risk          . Credit Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- -------------------------------------------------------------------------------
Performance The Fund does not yet have a full calendar year of performance.
Information Thus, no bar chart or average annual total returns table is
            included for the Fund.

5 PIMCO Funds: Multi-Manager Series
<PAGE>

            NFJ Equity Income Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund


            Shareholder Fees (fees paid directly from your investment) None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
         <S>             <C>      <C>            <C>           <C>
                                  Distribution                 Total Annual
                         Advisory and/or Service Other         Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(/1/) Expenses
            ------------------------------------------------------------------
         Institutional   0.45%    None           0.25%         0.70%
            ------------------------------------------------------------------
         Administrative  0.45     0.25%          0.25          0.95
            ------------------------------------------------------------------
            (1) Other Expenses is based on estimated amounts for the current
             fiscal year and reflects a 0.25% Administrative Fee paid by the
             class.

            Examples. The Examples below are intended to help you compare the
            cost of investing in Institutional Class or Administrative Class
            shares of the Fund with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund's
            operating expenses remain the same. Although your actual costs may
            be higher or lower, the Examples show what your costs would be
            based on these assumptions.

<CAPTION>
         Share Class     Year 1   Year 3
            ------------------------------------------------------------------
         Institutional   $72      $224
            ------------------------------------------------------------------
         Administrative   97       303
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 6
<PAGE>

            NFJ Value Fund

- -------------------------------------------------------------------------------
Principal     Investment ObjectiveFund Focus              Approximate
Investments   Seeks long-term     Undervalued             Capitalization Range
and           growth of capital   larger                  More than $2 billion
Strategies    and income          capitalization
                                  common stocks

                                                          Dividend Frequency
                                                          Quarterly

                                  Approximate
                                  Number of
                                  Holdings
                                  40

            The Fund seeks to achieve its investment objective by normally
            investing at least 65% of its assets in common stocks of companies
            with market capitalizations of more than $2 billion at the time of
            investment and below average P/E ratios relative to the market and
            their respective industry groups. To achieve income, the Fund
            invests a portion of its assets in income-producing (e.g.,
            dividend-paying) common stocks.

             The Fund's initial selection universe consists of the 1,000
            largest publicly traded companies (in terms of market
            capitalization) in the U.S. The portfolio managers classify the
            universe by industry. They then identify the most undervalued
            stocks in each industry based mainly on relative P/E ratios,
            calculated both with respect to trailing operating earnings and
            forward earnings estimates. After narrowing this universe to
            approximately 150 candidates, the portfolio managers select
            approximately 40 stocks for the Fund, each representing a
            different industry group. The portfolio managers select stocks
            based on a quantitative analysis of factors including price
            momentum (based on changes in stock price relative to changes in
            overall market prices), earnings momentum (based on analysts'
            earnings per share estimates and revisions to those estimates),
            relative dividend yields, valuation relative to the overall market
            and trading liquidity. The Fund's portfolio is generally
            rebalanced quarterly. The portfolio managers may also replace a
            stock when a stock within the same industry group has a
            considerably lower valuation than the Fund's current holding.

             Under normal circumstances, the Fund intends to be fully invested
            in common stocks (aside from certain cash management practices).
            The Fund may temporarily hold up to 10% of its assets in cash and
            cash equivalents for defensive purposes in response to unfavorable
            market and other conditions. This would be inconsistent with the
            Fund's investment objective and principal strategies.

- -------------------------------------------------------------------------------
Principal   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

            .Market Risk       .Value Securities Risk    .Management Risk
            .Issuer Risk       .Credit Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- -------------------------------------------------------------------------------
Performance The Fund does not yet have a full calendar year of performance.
Information Thus, no bar chart or average annual total returns table is
            included for the Fund.


7 PIMCO Funds: Multi-Manager Series
<PAGE>

            NFJ Value Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)
                                                          None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
         <S>             <C>      <C>            <C>           <C>
                                  Distribution                 Total Annual
                         Advisory and/or Service Other         Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(/1/) Expenses
            ------------------------------------------------------------------
         Institutional   0.45%    None           0.25%         0.70%
            ------------------------------------------------------------------
         Administrative  0.45     0.25%          0.25          0.95
            ------------------------------------------------------------------
            (1) Other Expenses is based on estimated amounts for the current
                fiscal year and reflects a 0.25% Administrative Fee paid by
                the class.

            Examples. The Examples below are intended to help you compare the
            cost of investing in Institutional Class or Administrative Class
            shares of the Fund with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund's
            operating expenses remain the same. Although your actual costs may
            be higher or lower, the Examples show what your costs would be
            based on these assumptions.

<CAPTION>
         Share Class     Year 1   Year 3
            ------------------------------------------------------------------
         Institutional   $72      $224
            ------------------------------------------------------------------
         Administrative   97       303
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 8
<PAGE>

            NFJ Value 25 Fund


- --------------------------------------------------------------------------------
Principal     Investment Objective
Investments   Seeks long-term      Fund Focus             Approximate
and           growth of            Undervalued            Capitalization Range
Strategies    capital and          medium                 Between $1 billion and
              income               capitalization         $5 billion
                                   common stocks



                                 Approximate Number     Dividend Frequency
                                 of Holdings            At least annually
                                 25

            The Fund seeks to achieve its investment objective by normally
            investing at least 65% of its assets in common stocks of companies
            with market capitalizations of between $1 billion and $5 billion
            at the time of investment and below average P/E ratios relative to
            their respective industry groups. The Fund normally invests in
            approximately 25 common stocks. To achieve income, the Fund
            invests a portion of its assets in income-producing (e.g.,
            dividend-paying) common stocks.

              The Fund's initial selection universe consists of approximately
            600 stocks of companies within the Fund's capitalization range.
            The portfolio managers classify the universe by industry. They
            then identify the most undervalued stocks in each industry based
            mainly on relative P/E ratios, calculated both with respect to
            trailing operating earnings and forward earnings estimates. The
            portfolio managers then select approximately 25 stocks, each
            representing a different industry group. Each stock has close to
            equal weighting in the portfolio. The portfolio managers select
            stocks based on an analysis of factors including price momentum
            (based on changes in stock price relative to changes in overall
            market prices), earnings momentum (based on analysts' earnings per
            share estimates and revisions to those estimates), relative
            dividend yields and trading liquidity. The Fund's portfolio is
            generally rebalanced quarterly. The portfolio managers may also
            replace a stock when a stock within the same industry group has a
            considerably lower valuation than the Fund's current holding.

              Under normal circumstances, the Fund intends to be fully
            invested in common stocks (aside from certain cash management
            practices). The Fund may temporarily hold up to 25% of its assets
            in cash and cash equivalents for defensive purposes in response to
            unfavorable market and other conditions. This would be
            inconsistent with the Fund's investment objective and principal
            strategies.

- --------------------------------------------------------------------------------
Principal   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              . Market Risk           . Smaller Company Risk   . Credit Risk
              . Issuer Risk           . Liquidity Risk         . Management Risk
              . Value Securities Risk . Focused Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not yet have a full calendar year of performance.
Information Thus, no bar chart or average annual total returns table is
            included for the Fund.

9 PIMCO Funds: Multi-Manager Series
<PAGE>

            NFJ Value 25 Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
         <S>             <C>      <C>            <C>           <C>
                                  Distribution                 Total Annual
                         Advisory and/or Service Other         Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(/1/) Expenses
            ------------------------------------------------------------------
         Institutional   0.50%    None           0.25%         0.75%
            ------------------------------------------------------------------
         Administrative  0.50     0.25%          0.25          1.00
            ------------------------------------------------------------------
            (1)  Other Expenses reflects a 0.25% Administrative Fee paid by
                 the class.

            Examples. The Examples below are intended to help you compare the
            cost of investing in Institutional Class or Administrative Class
            shares of the Fund with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund's
            operating expenses remain the same. Although your actual costs may
            be higher or lower, the Examples show what your costs would be
            based on these assumptions.

<CAPTION>
          Share Class   Year 1   Year 3
            ------------------------------------------------------------------
         <S>             <C>      <C>
         Institutional   $ 77     $240
            ------------------------------------------------------------------
         Administrative   102      318
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 10
<PAGE>

            Summary of Principal Risks

            The value of your investment in a Fund changes with the values of
            that Fund's investments. Many factors can affect those values. The
            factors that are most likely to have a material effect on a
            particular Fund's portfolio as a whole are called "principal
            risks." The principal risks of each Fund are identified in the
            Fund Summaries and are summarized in this section. Each Fund may
            be subject to additional principal risks and risks other than
            those described below because the types of investments made by
            each Fund can change over time. Securities and investment
            techniques mentioned in this summary and described in greater
            detail under "Characteristics and Risks of Securities and
            Investment Techniques" appear in bold type. That section and
            "Investment Objectives and Policies" in the Statement of
            Additional Information also include more information about the
            Funds, their investments and the related risks. There is no
            guarantee that a Fund will be able to achieve its investment
            objective.

Market      The market price of securities owned by a Fund may go up or down,
Risk        sometimes rapidly or unpredictably. Each of the Funds normally
            invests most of its assets in common stocks and/or other equity
            securities. A principal risk of investing in each Fund is that the
            equity securities in its portfolio will decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The values of
            equity securities may decline due to general market conditions
            which are not specifically related to a particular company, such
            as real or perceived adverse economic conditions, changes in the
            general outlook for corporate earnings, changes in interest or
            currency rates or adverse investor sentiment generally. They may
            also decline due to factors which affect a particular industry or
            industries, such as labor shortages or increased production costs
            and competitive conditions within an industry. Equity securities
            generally have greater price volatility than fixed income
            securities.

Issuer      The value of a security may also decline for a number of reasons
Risk        which directly relate to the issuer, such as management
            performance, financial leverage and reduced demand for the
            issuer's goods or services.

Value       The Funds place particular emphasis on investing in securities of
Securities  companies that may not be expected to experience significant
Risk        earnings growth, but whose securities its portfolio manager
            believes are selling at a price lower than their true value (value
            securities). Companies that issue value securities may have
            experienced adverse business developments or may be subject to
            special risks that have caused their securities to be out of
            favor. If a portfolio manager's assessment of a company's
            prospects is wrong, or if the market does not recognize the value
            of the company, the price of its securities may decline or may not
            approach the value that the portfolio manager anticipates.

Smaller     The general risks associated with equity securities and liquidity
Company     risk are particularly pronounced for securities of companies with
Risk        smaller market capitalizations. These companies may have limited
            product lines, markets or financial resources or they may depend
            on a few key employees. Securities of smaller companies may trade
            less frequently and in lesser volume than more widely held
            securities and their values may fluctuate more sharply than other
            securities. They may also trade in the over-the-counter market or
            on a regional exchange, or may otherwise have limited liquidity.
            The NFJ Value 25 Fund may have significant exposure to this risk
            because it invests substantial assets in companies with medium-
            sized market capitalizations, which are smaller and generally
            less-seasoned than the largest companies.

11 PIMCO Funds: Multi-Manager Series
<PAGE>

Liquidity   All of the Funds are subject to liquidity risk. Liquidity risk
Risk        exists when particular investments are difficult to purchase or
            sell, possibly preventing a Fund from selling such illiquid
            securities at an advantageous time or price. Funds with principal
            investment strategies that involve securities of companies with
            smaller market capitalizations, foreign securities, derivatives or
            securities with substantial market and/or credit risk tend to have
            the greatest exposure to liquidity risk.

Focused     Focusing Fund investments in a small number of issuers, industries
Investment  or foreign currencies increases risk. Funds, such as the NFJ Value
Risk        25 Fund, that invest in a relatively small number of issuers may
            have more risk because changes in the value of a single security
            or the impact of a single economic, political or regulatory
            occurrence may have a greater adverse impact on the Fund's net
            asset value. Some of those issuers also may present substantial
            credit or other risks. Also, the Funds may from time to time have
            greater risk because they invest a substantial portion of their
            assets in related industries such as "technology" or "financial
            and business services."

Credit      All of the Funds are subject to credit risk. This is the risk that
Risk        the issuer or the guarantor of a fixed income security, or the
            counterparty to a repurchase agreement or a loan of portfolio
            securities, is unable or unwilling to make timely principal and/or
            interest payments, or to otherwise honor its obligations.
            Securities are subject to varying degrees of credit risk, which
            are often reflected in their credit ratings.

Management  Each Fund is subject to management risk because it is an actively
Risk        managed investment portfolio. PIMCO Advisors, NFJ and each
            individual portfolio manager will apply investment techniques and
            risk analyses in making investment decisions for the Funds, but
            there can be no guarantee that these will produce the desired
            results.

                                                                   Prospectus 12
<PAGE>

                Management of the Funds

Investment      PIMCO Advisors serves as the investment adviser and the
Adviser         administrator (serving in its capacity as administrator, the
and             "Administrator") for the Funds. Subject to the supervision of
Administrator   the Board of Trustees, PIMCO Advisors is responsible for
                managing, either directly or through others selected by it, the
                investment activities of the Funds and the Funds' business
                affairs and other administrative matters.

                PIMCO Advisors is located at 800 Newport Center Drive, Newport
                Beach, California 92660. Organized in 1987, PIMCO Advisors
                provides investment management and advisory services to private
                accounts of institutional and individual clients and to mutual
                funds. As of December 31, 1999, PIMCO Advisors and its
                subsidiary partnerships had more than $261 billion in assets
                under management.

                PIMCO Advisors has retained an affiliated investment management
                firm, NFJ Investment Group ("NFJ" or the "Sub-Adviser") to
                manage each Fund's investments. See "Sub-Adviser" below. PIMCO
                Advisors has retained its affiliate, Pacific Investment
                Management Company, to provide various administrative and other
                services required by the Funds in its capacity as sub-
                administrator. PIMCO Advisors and the sub-administrator may
                retain other affiliates to provide certain of these services.

Advisory        Each Fund pays PIMCO Advisors fees in return for providing or
Fees            arranging for the provision of investment advisory services.
                PIMCO Advisors (and not the Funds) pays a portion of the
                advisory fees it receives to NFJ in return for NFJ's services as
                Sub-Adviser.

                The Funds pay monthly advisory fees to PIMCO Advisors at the
                following annual rates (stated as a percentage of the average
                daily net assets of each Fund taken separately):

<TABLE>
<CAPTION>
         Fund                                   Advisory Fees
            -------------------------------------------------
         <S>                                    <C>
         NFJ Equity Income and NFJ Value Funds      0.45%
         NFJ Value 25 Fund                          0.50%
</TABLE>

Administrative  Each Fund pays for the administrative services it requires under
Fees            a fee structure which is essentially fixed. Institutional and
                Administrative Class shareholders of each Fund pay an
                administrative fee to PIMCO Advisors, computed as a percentage
                of the Fund's assets attributable in the aggregate to those
                classes of shares. PIMCO Advisors, in turn, provides or procures
                administrative services for Institutional and Administrative
                Class shareholders and also bears the costs of various third-
                party services required by the Funds, including audit,
                custodial, portfolio accounting, legal, transfer agency and
                printing costs. The result of this fee structure is an expense
                level for Institutional and Administrative Class shareholders of
                each Fund that, with limited exceptions, is precise and
                predictable under ordinary circumstances.

                Institutional and Administrative Class shareholders of the Funds
                pay PIMCO Advisors monthly administrative fees at the annual
                rate of 0.25% (stated as a percentage of the average daily net
                assets attributable in the aggregate to the Fund's Institutional
                and Administrative Class shares):

Sub-            The Sub-Adviser has full investment discretion and makes all
Adviser         determinations with respect to the investment of a Fund's
                assets. The following provides summary information about the
                Sub-Adviser, including its investment specialty.

<TABLE>
<CAPTION>
         Sub-Adviser              Investment Specialty
            --------------------------------------------------------------------
         <S>                      <C>
         NFJ Investment Group     Value stocks that NFJ believes are undervalued
         2121 San Jacinto, Suite  and/or offer above-average dividend yields
         1840
         Dallas, TX 75201
</TABLE>

13 PIMCO Funds: Multi-Manager Series
<PAGE>

             The following provides additional information about the Sub-
            Adviser and the individual Portfolio Manager(s) who have or share
            primary responsibility for managing the Funds' investments.

             An affiliated sub-partnership of PIMCO Advisors, NFJ provides
            advisory services to mutual funds and institutional accounts. NFJ
            Investment Group, Inc., the predecessor investment adviser to NFJ,
            commenced operations in 1989. Accounts managed by NFJ had combined
            assets as of December 31, 1999 of approximately $2.1 billion.

            The following individuals at NFJ share primary responsibility for
            the noted Funds.

<TABLE>
<CAPTION>
         Fund               Portfolio Managers  Since          Recent Professional Experience
            ---------------------------------------------------------------------------------------
         <S>                <C>                 <C>            <C>
         NFJ Equity Income  Chris Najork        2000*          Managing Director and founding
                                                               partner of NFJ. He has 30 years'
                                                               experience encompassing equity
                                                               research and portfolio management.
                                                               Prior to the formation of NFJ in
                                                               1989, he was a senior vice
                                                               president, senior portfolio manager
                                                               and analyst at NationsBank, which he
                                                               joined in 1974.

                            Benno J. Fischer    2000*          Managing Director and founding
                                                               partner of NFJ. He has 32 years'
                                                               experience in portfolio management,
                                                               investment analysis and research.
                                                               Prior to the formation of NFJ in
                                                               1989, he was chief investment
                                                               officer (institutional and fixed
                                                               income), senior vice president and
                                                               senior portfolio manager at
                                                               NationsBank, which he joined in
                                                               1971. Prior to joining NationsBank,
                                                               Mr. Fischer was a securities analyst
                                                               at Chase Manhattan Bank and Clark,
                                                               Dodge.

         NFJ Value          Messrs. Najork and  2000*          See above.
                            Fischer

                            Paul A. Magnuson    2000*          Principal at NFJ. He is a Portfolio
                                                               Manager and Senior Research Analyst
                                                               with 14 years' experience in equity
                                                               analysis and portfolio management.
                                                               Prior to joining NFJ in 1992, he was
                                                               an assistant vice president at
                                                               NationsBank, which he joined in
                                                               1985. Within the Trust Investment
                                                               Qualitative Services Division of
                                                               NationsBank, he was responsible for
                                                               equity analytics and structured fund
                                                               management.

         NFJ Value 25       Messrs. Najork and  2000*          See above.
                            Fischer

                            E. Clifton Hoover,  2000*          Principal at NFJ. He is a Portfolio
                            Jr.                                Manager with 13 years' experience in
                                                               financial analysis and portfolio
                                                               management. Prior to joining NFJ in
                                                               1997, he was associated with Credit
                                                               Lyonnais from 1991 to 1997, where he
                                                               served as a vice president and was
                                                               responsible for the financial
                                                               analysis and portfolio management of
                                                               a diversified portfolio. He began
                                                               his career as a financial analyst
                                                               with NationsBank in 1985.
</TABLE>

            -------
            *Since inception of the Fund

Distributor The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors. The Distributor, located at
            2187 Atlantic Street, Stamford, Connecticut 06902, is a broker-
            dealer registered with the Securities and Exchange Commission.

                                                                   Prospectus 14
<PAGE>

            Investment Options --
            Institutional Class and Administrative Class Shares

            The Trust offers investors Institutional Class and Administrative
            Class shares of the Funds in this Prospectus.

             The Trust does not charge any sales charges (loads) or other fees
            in connection with purchases, sales (redemptions) or exchanges of
            Institutional Class or Administrative Class shares. See
            "Purchases, Redemptions and Exchanges" below.

             Administrative Class shares are generally subject to a higher
            level of operating expenses than Institutional Class shares due to
            the additional service and/or distribution fees paid by
            Administrative Class shares as described below. Therefore,
            Institutional Class shares will generally pay higher dividends and
            have a more favorable investment return than Administrative Class
            shares.

              . Service and Distribution (12b-1) Fees--Administrative Class
            Shares. The Trust has adopted both an Administrative Services Plan
            and a Distribution Plan for the Administrative Class shares of
            each Fund. Each Plan has been adopted in accordance with the
            requirements of Rule 12b-1 under the Investment Company Act of
            1940 and is administered in accordance with that rule. However,
            shareholders do not have the voting rights set forth in Rule 12b-1
            with respect to the Administrative Services Plan.

             Each Plan allows the Funds to use its Administrative Class assets
            to reimburse financial intermediaries that provide services
            relating to Administrative Class shares. The Distribution Plan
            permits reimbursement for expenses in connection with the
            distribution and marketing of Administrative Class shares and/or
            the provision of shareholder services to Administrative Class
            shareholders. The Administrative Services Plan permits
            reimbursement for services in connection with the administration
            of plans or programs that use Administrative Class shares of the
            Funds as their funding medium and for related expenses.

             In combination, the Plans permit a Fund to make total
            reimbursements at an annual rate of up to 0.25% of the Fund's
            average daily net assets attributable to its Administrative Class
            shares. The same entity may not receive both distribution and
            administrative services fees with respect to the same
            Administrative Class assets, but may receive fees under each Plan
            with respect to separate assets. Because these fees are paid out
            of a Fund's Administrative Class assets on an ongoing basis, over
            time they will increase the cost of an investment in
            Administrative Class shares and may cost an investor more than
            other types of sales charges.

              . Arrangements with Service Agents. Institutional Class and
            Administrative Class shares of the Funds may 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 and/or
            distribution fees paid with respect to Administrative Class
            shares. Service agents may impose additional or different
            conditions than the Trust on purchases, redemptions or exchanges
            of Fund shares by their customers. Service agents may also
            independently establish and charge their customers transaction
            fees, account fees and other amounts in connection with purchases,
            sales and redemptions of Fund shares in addition to any fees
            charged by the Trust. These additional fees may vary over time and
            would increase the cost of the customer's investment and lower
            investment returns. 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, redemptions and exchanges. Shareholders who
            are customers of service agents should consult their service
            agents for information regarding these fees and conditions.

15 PIMCO Funds: Multi-Manager Series
<PAGE>

            Purchases, Redemptions and Exchanges

Purchasing  Investors may purchase Institutional Class and Administrative
Shares      Class shares of the Funds at the relevant net asset value ("NAV")
            of that class without a sales charge or other fee.

             Institutional Class shares 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 transaction or other fees with respect to their
            customers' investments in the Funds.

             Administrative Class shares are offered primarily through
            employee benefit plan alliances, broker-dealers and other
            intermediaries, and each Fund pays service and/or distribution
            fees to these entities for services they provide to Administrative
            Class shareholders.

             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.

              . Investment Minimums. 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. At the discretion of PIMCO
            Advisors, the minimum initial investment may be waived for
            Institutional or Administrative Class shares offered to clients of
            PIMCO Advisors, NFJ and their affiliates. In addition, the minimum
            initial investment does not apply to Institutional Class shares
            offered through fee-based programs sponsored and maintained by a
            registered broker-dealer and approved by the Distributor in which
            each investor pays an asset based fee at an annual rate of at
            least 0.50% of the assets in the account to a financial
            intermediary for investment advisory and/or administrative
            services.

             The Trust and the Distributor may waive the minimum initial
            investment for other categories of investors at their discretion.

              . Timing of Purchase Orders and Share Price Calculations. A
            purchase order received by the Trust's transfer agent, National
            Financial Data Services (the "Transfer Agent"), prior to the close
            of regular trading (normally 4:00 p.m., Eastern time) on the New
            York Stock Exchange, on a day the Trust is open for business,
            together with payment made in one of the ways described below,
            will be effected at that day's net asset value ("NAV"). An order
            received after the close of regular trading on the New York Stock
            Exchange will be effected at the NAV 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 New York Stock Exchange and
            communicated to the Transfer Agent prior to 9:00 a.m., Eastern
            time, on the following business day will be effected at the NAV
            determined on the prior business day. The Trust is "open for
            business" on each day the New York Stock 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.

              . Initial Investment. Investors may open an account by
            completing and signing a Client Registration Application and
            mailing it to PIMCO Funds at 840 Newport Center Drive, Suite 300,
            Newport Beach, California 92660. A Client Registration Application
            may be obtained by calling 1-800-927-4648.

                                                                   Prospectus 16
<PAGE>

             Except as described below, an investor may purchase Institutional
            Class and Administrative Class shares only by wiring federal funds
            to the Transfer Agent, National Financial Data Services, 330 West
            9th Street, 4th Floor, Kansas City, Missouri 64105. Before wiring
            federal funds, the investor must telephone the Trust at 1-800-927-
            4648 to receive instructions for wire transfer and must provide
            the following information: name of authorized person, shareholder
            name, shareholder account number, name of Fund and share class,
            amount being wired, and wiring bank name.

             An investor may purchase shares without first wiring federal
            funds if the proceeds of the investment are derived from an
            advisory account the investor maintains with PIMCO Advisors or one
            of its affiliates 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.

              . Additional Investments. An investor may purchase additional
            Institutional Class and Administrative Class shares of the Funds
            at any time by calling the Trust and wiring federal funds to the
            Transfer Agent as outlined above.

              . 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.

             An investor should invest in the Funds for long-term investment
            purposes only. The Trust, PIMCO Advisors and NFJ each reserve 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. Notice of
            any such restrictions, if any, will vary according to the
            particular circumstances.

             Institutional Class and Administrative Class shares of the Trust
            are not qualified or registered for sale in all states. Investors
            should inquire as to whether shares of a particular Fund are
            available for offer and sale in the investor's 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.

             Subject to the approval of the Trust, an investor may purchase
            shares of a Fund with liquid securities that are eligible for
            purchase by the Fund (consistent with the 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 PIMCO Advisors or NFJ
            intends to retain the security in the Fund as an investment.
            Assets purchased by a Fund in such a transaction will be 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.

              . 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

17 PIMCO Funds: Multi-Manager Series
<PAGE>

            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.

Redeeming     . Redemptions by Mail. An investor may redeem (sell)
Shares      Institutional Class and Administrative Class shares by submitting
            a written request to PIMCO Funds at 840 Newport Center Drive,
            Suite 300, Newport Beach, California 92660. The redemption request
            should state 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. An
            investor that elects this option on the Client Registration
            Application (or subsequently in writing) may request redemptions
            of shares by calling the Trust at 1-800-927-4648, by sending a
            facsimile to 1-949-725-6830, or by other means of wire
            communication. Investors should state the Fund and class from
            which the shares are to be redeemed, the number 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 Company 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 Company or the Transfer Agent to be genuine. Neither
            the Trust nor the 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
            Company or the Transfer Agent may request certain information in
            order to verify that the person giving instructions is authorized
            to do so. The Trust or Transfer Agent may be liable for any losses
            due to unauthorized or fraudulent telephone transactions if it
            fails to employ reasonable procedures to confirm that instructions
            communicated by telephone are genuine. 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 "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.

                                                                   Prospectus 18
<PAGE>

             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 NAV per share next determined after
            receipt of a redemption request by the Trust or its designee. The
            request must properly identify all relevant information, such as
            account number, redemption amount (in dollars or shares) and the
            Fund name, and must be executed or initialed by the appropriate
            signatories. A redemption request received by the Trust or its
            designee prior to the close of regular trading on the New York
            Stock 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.

             Redemption proceeds 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 New York
            Stock Exchange is closed, or during certain other periods as
            permitted under the federal securities laws.

             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.

             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.

             Redemptions of Fund shares may be suspended when trading on the
            New York Stock 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 assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors. Under these
            and other unusual circumstances, the Trust may suspend redemptions
            or postpone payment for more than seven days, as permitted by law.

Exchange    An investor may exchange Institutional Class or Administrative
Privilege   Class shares of a Fund described in this prospectus for shares of
            the same class of any other Fund described in this prospectus
            based on the respective NAVs of the shares involved. An exchange
            may be made by following the redemption procedure described

19 PIMCO Funds: Multi-Manager Series
<PAGE>

            above under "Redemptions by Mail" or, if the investor has elected
            the telephone redemption option, by calling the Trust at 1-800-
            927-4648.

             An investor may exchange shares only with respect to Funds or
            other eligible series that are registered in the investor's state
            of residence or where an exemption from registration is available.
            In addition, an exchange is generally a taxable event which will
            generate capital gains or losses, and special rules may apply in
            computing tax basis when determining gain or loss. See "Tax
            Consequences" in this Prospectus and "Taxation" in the Statement
            of Additional Information.

             The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO Advisors, 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 PIMCO Advisors to be detrimental to the Trust or a
            particular Fund. The Trust reserves the right to impose additional
            restrictions on exchanges at any time, although it will attempt to
            give shareholders 30 days' prior notice whenever it is reasonably
            able to do so.

            How Fund Shares Are Priced

            The net asset value ("NAV") of a Fund's Institutional and
            Administrative Class shares is determined by dividing the total
            value of a Fund's portfolio investments and other assets
            attributable to that class, less any liabilities, by the total
            number of shares outstanding of that class.

             For purposes of calculating the NAV, portfolio securities and
            other assets for which market quotes are available are stated at
            market value. Market value is generally determined on the basis of
            last reported sales prices, or if no sales are reported, based on
            quotes obtained from a quotation reporting system, established
            market makers, or pricing services. Certain securities or
            investments for which daily market quotes are not readily
            available may be valued, pursuant to guidelines established by the
            Board of Trustees, with reference to other securities or indices.
            Short-term investments having a maturity of 60 days or less are
            generally valued at amortized cost. Exchange traded options,
            futures and options on futures are valued at the settlement price
            determined by the exchange. Other securities for which market
            quotes are not readily available are valued at fair value as
            determined in good faith by the Board of Trustees or persons
            acting at their direction.

             Investments initially valued in currencies other than the U.S.
            dollar are converted to U.S. dollars using exchange rates obtained
            from pricing services. As a result, the NAV of a Fund's shares may
            be affected by changes in the value of currencies in relation to
            the U.S. dollar. The value of securities traded in markets outside
            the United States or denominated in currencies other than the U.S.
            dollar may be affected significantly on a day that the New York
            Stock Exchange is closed and an investor is not able to purchase,
            redeem or exchange shares.

             Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time) (the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Funds normally use pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Funds or their agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Funds may value securities at fair value or
            estimate their value as determined in good faith by the Board of
            Trustees pursuant to procedures approved by the Board of Trustees.
            Fair valuation may also be used by the Board of Trustees if
            extraordinary events occur after the close of the relevant market
            but prior to the NYSE Close.

                                                                   Prospectus 20
<PAGE>

             Under certain circumstances, the per share NAV of the
            Administrative Class shares of the Funds may be lower than the per
            share NAV of the Institutional Class shares as a result of the
            daily expense accruals of the service and/or distribution fees
            paid by 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 the two classes.

            Fund Distributions

            Each Fund distributes substantially all of its net investment
            income to shareholders in the form of dividends. A shareholder
            begins earning dividends on Fund shares the day after the Trust
            receives the shareholder's purchase payment. Dividends paid by
            each Fund with respect to each class of shares are calculated in
            the same manner and at the same time, but dividends on
            Administrative Class shares are expected to be lower than
            dividends on Institutional Class shares as a result of the service
            and/or distribution fees applicable to Administrative Class
            shares.

             The NFJ Equity Income and NFJ Value Funds each intend to declare
            and distribute income dividends to shareholders of record at least
            quarterly. The NFJ Value 25 Fund intends to declare and distribute
            income dividends to shareholders of record at least annually. In
            addition, each Fund distributes any net capital gains it earns
            from the sale of portfolio securities to shareholders no less
            frequently than annually. Net short-term capital gains may be paid
            more frequently.

             A Fund's dividend and capital gain distributions with respect to
            a particular class of shares will automatically be reinvested in
            additional shares of the same class of the Fund at NAV unless the
            shareholder elects to have the distributions paid in cash. A
            shareholder may elect to have distributions paid in cash on the
            Client Registration Application or by submitting a written
            request, signed by the appropriate signatories, indicating the
            account number, Fund name(s) and wiring instructions. Shareholders
            do not pay any sales charges or other fees on shares received
            through the reinvestment of Fund distributions.

             For further information on distribution options, please contact
            the Trust at 1-800-927-4648.

            Tax Consequences

              . Taxes on Fund Distributions. A shareholder subject to U.S.
            federal income tax will be subject to tax on Fund distributions
            whether they are paid in cash or reinvested in additional shares
            of the Funds. For federal income tax purposes, Fund distributions
            will be taxable to the shareholder as either ordinary income or
            capital gains.

             Fund dividends (i.e., distributions of investment income) are
            taxable to shareholders as ordinary income. Federal taxes on Fund
            distributions of gains are determined by how long the Fund owned
            the investments that generated the gains, rather than how long the
            shareholder owned the shares. Distributions of gains from
            investments that a Fund owned for more than 12 months will
            generally be taxable to shareholders as capital gains.
            Distributions of gains from investments that the Fund owned for 12
            months or less will generally be taxable as ordinary income.

             Fund distributions are taxable to shareholders even if they are
            paid from income or gains earned by a Fund prior to the
            shareholder's investment and thus were included in the price paid
            for the shares. For example, a shareholder who purchases shares on
            or just before the record date of a Fund distribution will pay
            full price for the shares and may receive a portion of his or her
            investment back as a taxable distribution.


21 PIMCO Funds: Multi-Manager Series
<PAGE>

                   . Taxes on Redemptions or Exchanges of Shares. Any gain
                 resulting from the sale of Fund shares will generally be
                 subject to federal income tax. When a shareholder exchanges
                 shares of a Fund for shares of another series, the transaction
                 generally will be treated as a sale of the Fund shares for
                 these purposes, and any gain on those shares will generally be
                 subject to federal income tax.

                   . A Note on Foreign Investments. A Fund's investments in
                 foreign securities, if any, may be subject to foreign
                 withholding taxes. In that case, the Fund's yield on those
                 securities would be decreased. In addition, a Fund's
                 investments in foreign securities or foreign currencies may
                 increase or accelerate the Fund's recognition of ordinary
                 income and may affect the timing or amount of the Fund's
                 distributions.

                  This section relates only to federal income tax; the
                 consequences under other tax laws may differ. Shareholders
                 should consult their tax advisors as to the possible
                 application of foreign, state and local income tax laws to Fund
                 dividends and capital distributions. Please see the Statement
                 of Additional Information for additional information regarding
                 the tax aspects of investing in the Funds.

                 Characteristics and Risks of
                 Securities and Investment Techniques

                 This section provides additional information about some of the
                 principal investments and related risks of the Funds identified
                 under "Summary Information" above. It also describes
                 characteristics and risks of additional securities and
                 investment techniques that are not necessarily principal
                 investments or strategies but may be used by the Funds from
                 time to time. Most of these securities and investment
                 techniques are discretionary, which means that the portfolio
                 managers can decide whether to use them or not. This Prospectus
                 does not attempt to disclose all of the various types of
                 securities and investment techniques that may be used by the
                 Funds. As with any mutual fund, investors in the Funds must
                 rely on the professional investment judgment and skill of the
                 Funds' Adviser and Sub-Adviser and the individual portfolio
                 managers. Please see "Investment Objectives and Policies" in
                 the Statement of Additional Information for more detailed
                 information about the securities and investment techniques
                 described in this section and about other strategies and
                 techniques that may be used by the Funds.

Fixed            Fixed income securities are obligations of the issuer to make
Income           payments of principal and/or interest on future dates, and
Securities       include corporate and government bonds, notes, certificates of
and              deposit, commercial paper, convertible securities and mortgage-
Defensive        backed and other asset-backed securities.
Strategies

                  Under normal circumstances, the Funds intend to be fully
                 invested in common stocks (aside from cash management
                 practices), except that each of the Funds may temporarily hold
                 up to 10% of its assets in cash and cash equivalents for
                 defensive purposes in response to unfavorable market and other
                 conditions. These temporary defensive strategies would be
                 inconsistent with the investment objective and principal
                 investment strategies of each of the Funds and may adversely
                 affect a Fund's ability to achieve its investment objective.

Companies        Each of the Funds may invest in securities of companies with
With             market capitalizations that are small compared to other
Smaller          publicly traded companies. The NFJ Value 25 Fund has
Market           significant exposure to the risks described below because it
Capitalizations  invests primarily in companies with medium-sized market
                 capitalization, which are smaller than the largest companies.
                 Companies which are smaller and less well-known or seasoned
                 than larger, more widely held companies may offer greater
                 opportunities for capital appreciation, but may also involve
                 risks different from, or greater than, risks normally
                 associated with larger companies. Larger 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 than smaller companies. Smaller

                                                                   Prospectus 22
<PAGE>

            companies may have limited product lines, markets or financial
            resources or may depend on a small, inexperienced management
            group. Securities of smaller companies may trade less frequently
            and in lesser volume than more widely held securities and their
            values may fluctuate more abruptly or erratically than securities
            of larger companies. They may also trade in the over-the-counter
            market or on a regional exchange, or may otherwise have limited
            liquidity. These securities may therefore be more vulnerable to
            adverse market developments than securities of larger companies.
            Also, there may be less publicly available information about
            smaller companies or less market interest in their securities as
            compared to larger companies, and it may take longer for the
            prices of the securities to reflect the full value of a company's
            earnings potential or assets.

             Because securities of smaller companies may have limited
            liquidity, a Fund may have difficulty establishing or closing out
            its positions in smaller companies at prevailing market prices. 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. For these reasons, 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 smaller capitalization securities, which
            could adversely affect performance.

             The Funds may purchase securities in initial public offerings
            (IPOs). These securities are subject to many of the same risks of
            investing in companies with smaller market capitalizations.
            Securities issued in IPOs have no trading history, and information
            about the companies may be available for very limited periods. In
            addition, the prices of securities sold in IPOs may be highly
            volatile. A Fund may not be able to invest in securities issued in
            IPOs to the extent desired because, for example, only a small
            portion of the securities being offered in an IPO may be made
            available to the Fund or because under certain market conditions
            few companies may issue securities in IPOs.

Foreign     Each of the Funds may invest in foreign securities, including
Securities  American Depository Receipts ("ADRs"). 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.

             Investing in foreign securities involves special risks and
            considerations not typically associated with investing in U.S.
            securities and shareholders should consider carefully the
            substantial risks involved for Funds that invest in these
            securities. 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; and political instability. 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 foreign securities
            markets may change independently of each other. Also, 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. Investments in foreign
            securities may also involve higher custodial costs than domestic
            investments and additional transaction costs with respect to
            foreign currency conversions. Changes in foreign exchange rates
            also will affect the value of securities denominated or quoted in
            foreign currencies.

23 PIMCO Funds: Multi-Manager Series
<PAGE>

Foreign     A Fund that invests directly in foreign currencies or in
Currencies  securities that trade in, and receive revenues in, foreign
            currencies will be subject to currency risk. Foreign currency
            exchange rates may fluctuate significantly over short periods of
            time. They generally are determined by supply and demand and the
            relative merits of investments in different countries, actual or
            perceived changes in interest rates and other complex factors.
            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. For example, significant uncertainty surrounds the
            recent introduction of the euro (a common currency unit for the
            European Union) in January 1999 and the effect it may have 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.

Convertible Each Fund may invest in convertible securities. Convertible
Securities  securities are generally preferred stocks and other securities,
            including fixed income securities and warrants, that are
            convertible into or exercisable for common stock at either a
            stated price or a stated rate. The price of a convertible security
            will normally vary in some proportion to changes in the price of
            the underlying common stock because of this conversion or exercise
            feature. However, the value of a convertible security may not
            increase or decrease as rapidly as the underlying common stock. A
            convertible security will normally also provide income and is
            subject to interest rate risk. 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. Also, a Fund may be forced to convert a security
            before it would otherwise choose, which may have an adverse effect
            on the Fund's ability to achieve its investment objective.

Credit      The Funds may invest in securities based on their credit ratings
Ratings     assigned by rating agencies such as Moody's Investors Service,
and         Inc. ("Moody's") and Standard & Poor's Ratings Services ("S&P").
Unrated     Moody's, S&P and other rating agencies are private services that
Securities  provide ratings of the credit quality of fixed income securities,
            including convertible securities. The Appendix to the Statement of
            Additional Information describes the various ratings assigned to
            fixed income securities by Moody's and S&P. Ratings assigned by a
            rating agency are not absolute standards of credit quality and do
            not evaluate market risk. Rating agencies may fail to make timely
            changes in credit ratings and an issuer's current financial
            condition may be better or worse than a rating indicates. A Fund
            will not necessarily sell a security when its rating is reduced
            below its rating at the time of purchase. PIMCO Advisors and NFJ
            do not rely solely on credit ratings, and develop their own
            analysis of issuer credit quality.

             A Fund may purchase unrated securities (which are not rated by a
            rating agency) if its portfolio manager determines that the
            security is of comparable quality to a rated security that the
            Fund may purchase. Unrated securities may be less liquid than
            comparable rated securities and involve the risk that the
            portfolio manager may not accurately evaluate the security's
            comparative credit rating.

Loans of    For the purpose of achieving income, each Fund may lend its
Portfolio   portfolio securities to brokers, dealers, and other financial
Securities  institutions provided a number of conditions are satisfied,
            including that the loan is fully collateralized. Please see
            "Investment Objectives and Policies" in the Statement of
            Additional Information for details. When a Fund lends portfolio
            securities, its investment performance will continue to reflect
            changes in the value of the securities loaned, and the Fund will
            also receive a fee or interest on the collateral. Securities
            lending involves the risk of loss of rights in the collateral or
            delay in recovery of the collateral if the borrower fails to
            return the security loaned or becomes insolvent. A Fund may pay
            lending fees to the party arranging the loan.

                                                                   Prospectus 24
<PAGE>

Short       Each Fund may make short sales as part of its overall portfolio
Sales       management strategies or to offset a potential decline in the
            value of a security. A short sale involves the sale of a security
            that is borrowed from a broker or other institution to complete
            the sale. A Fund may only enter into short selling transactions if
            the security sold short is held in the Fund's portfolio or if the
            Fund has the right to acquire the security 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 a Fund to the
            risk that it will be required to acquire, convert or exchange
            securities to replace the borrowed securities (also known as
            "covering" the short position) at a time when the securities sold
            short have appreciated 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
Delivery    securities for a fixed price at a future date beyond normal
and         settlement time (forward commitments). When-issued transactions,
Forward     delayed delivery purchases and forward commitments involve a risk
Commitment  of loss if the value of the securities declines prior to the
Transactionssettlement date. This risk is in addition to the risk that the
            Fund's other assets will decline in value. Therefore, these
            transactions may result in a form of leverage and increase a
            Fund's overall investment exposure. 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 to cover these positions.

Repurchase  Each Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer that agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund will seek to sell the securities which it holds.
            This could involve procedural costs or delays in addition to a
            loss on the securities if their value should fall below their
            repurchase price. Repurchase agreements maturing in more than
            seven days are considered illiquid securities.

Reverse     Each Fund may enter into reverse repurchase agreements, subject to
Repurchase  the Fund's limitations on borrowings. A reverse repurchase
Agreements  agreement involves the sale of a security by a Fund and its
and Other   agreement to repurchase the instrument at a specified time and
Borrowings  price, and may be considered a form of borrowing for some
            purposes. A Fund will segregate assets determined to be liquid by
            PIMCO Advisors or NFJ in accordance with procedures established by
            the Board of Trustees to cover its obligations under reverse
            repurchase agreements. 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.
            Reverse repurchase agreements and other forms of borrowings may
            create leveraging risk for a Fund.

Illiquid    Each Fund may invest in securities that are illiquid so long as
Securities  not more than 15% of the value of the Fund's net assets (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 held by the
            Fund, 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. Please see "Investment Objectives and Policies" in
            the Statement of Additional Information for a listing of various
            securities that are generally considered to be illiquid for these
            purposes. Restricted securities, i.e., securities subject to legal
            or contractual restrictions on resale, may be illiquid. However,
            some restricted securities (such as securities issued pursuant to
            Rule 144A under the Securities Act of 1933 and certain commercial
            paper) may be treated as liquid, although they may be less liquid
            than registered securities traded on established secondary
            markets.

25 PIMCO Funds: Multi-Manager Series
<PAGE>

Investment  Each of the Funds may invest up to 5% of its assets in securities
in Other    of other investment companies, such as closed-end management
Investment  investment companies, or in other pooled investment vehicles. As a
Companies   shareholder of an investment company, a Fund may indirectly bear
            service and other fees which are in addition to the fees the Fund
            pays its service providers.

Portfolio   The length of time a Fund has held a particular security is not
Turnover    generally a consideration in investment decisions. A change in the
            securities held by a Fund is known as "portfolio turnover." Each
            Fund may engage in active and frequent trading of portfolio
            securities to achieve its investment objective and principal
            investment strategies, particularly during periods of volatile
            market movements. 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 also result in realization of taxable
            capital gains, including short-term capital gains (which are taxed
            at ordinary income tax rates when distributed to shareholders who
            are individuals). The trading costs and tax effects associated
            with portfolio turnover may adversely affect a Fund's performance.

Changes     The investment objective of each Fund may be changed by the Board
in          of Trustees without shareholder approval. Unless otherwise stated
Investment  in the Statement of Additional Information, all investment
Objectives  policies of the Funds may be changed by the Board of Trustees
and         without shareholder approval. If there is a change in a Fund's
Policies    investment objective or policies, 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.

New Funds   In addition to the risks described under "Summary of Principal
            Risks" above and in this section, the Funds are newly formed and
            therefore have no history upon which investors can evaluate their
            likely performance. Accordingly, there can be no assurance that
            the Funds will achieve their investment objectives. Also, it is
            possible that the Funds may invest in securities offered in
            initial public offerings and other similar transactions which,
            because of each Fund's size, may have a disproportionate impact on
            such Fund's performance results. The Funds would not necessarily
            have achieved the same performance results if their aggregate net
            assets had been greater.

Percentage  Unless otherwise stated, all percentage limitations on Fund
Investment  investments listed in this Prospectus will apply at the time of
Limitations investment. A Fund would not violate these limitations unless an
            excess or deficiency occurs or exists immediately after and as a
            result of an investment.

Other       The Funds may invest in other types of securities and use a
Investments variety of investment techniques and strategies which are not
and         described in this Prospectus. These securities and techniques may
Techniques  subject the Funds to additional risks. Please see the Statement of
            Additional Information for additional information about the
            securities and investment techniques described in this Prospectus
            and about additional securities and techniques that may be used by
            the Funds.

            Financial Highlights

            The Funds did not offer Institutional or Administrative Class
            shares during the periods ended December 31, 1999. Therefore,
            financial highlights are not provided for the Funds.


                                                                   Prospectus 26
<PAGE>




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<PAGE>




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<PAGE>




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<PAGE>

            -------------------------------------------------------------------
PIMCO       INVESTMENT ADVISER AND ADMINISTRATOR
Funds:      PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA
Multi-      92660
Manager     -------------------------------------------------------------------
Series      SUB-ADVISER
            NFJ Investment Group, 2121 San Jacinto, Suite 1840, Dallas, TX
            75201

            -------------------------------------------------------------------
            CUSTODIAN
            State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, MO
            64105

            -------------------------------------------------------------------
            TRANSFER AGENT
            National Financial Data Services, 330 W. 9th Street, 4th Floor,
            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>

The Trust's Statement of Additional Information ("SAI") and annual and
semi-annual reports to shareholders include additional information about the
Funds. The SAI and the financial statements included in the Funds' most recent
annual report to shareholders are incorporated by reference into this
Prospectus, which means they are part of this Prospectus for legal purposes. The
Funds' annual report discusses the market conditions and investment strategies
that significantly affected each Fund's performance during its last fiscal
year.

You may get free copies of any of these materials, request other information
about a Fund, or make shareholder inquiries by calling the Trust at 1-800-927-
4648 or PIMCO Infolink Audio Response Network at 1-800-987-4626, or by writing
to:

PIMCO Funds:
Multi-Manager Series
840 Newport Center Drive
Suite 300
Newport Beach, CA 92660

You may review and copy information about the Trust, including its SAI, at the
Securities and Exchange Commission's public reference room in Washington, D.C.
You may call the Commission at 1-202-942-8090 for information about the
operation of the public reference room. You may also access reports and other
information about the Trust on the EDGAR database on the Commission's Web site
at www.sec.gov. You may get copies of this information, with payment of a
duplication fee, by writing the Public Reference Section of the Commission,
Washington, D.C. 20549-6009, or by electronic request at the following e-mail
address: [email protected]. You may need to refer to the Trust's file number
under the Investment Company Act, which is 811-6161.

File No. 811-6161

[PIMCO Logo appears here]

PIMCO Funds
Multi-Manager Series

840 Newport Center Drive
Suite 300
Newport Beach, CA 92660

<PAGE>
                            PIMCO Funds Prospectus


<TABLE>
<S>                     <C>
Asset Allocation         ACTIVELY MANAGED PORTFOLIOS OF SELECT PIMCO FUNDS
Series
                         PIMCO Funds Asset Allocation Series consists of three
April 3, 2000            actively managed mutual funds that invest in a
                         diversified portfolio of PIMCO Funds. In addition to
Share Classes            broad diversification, each Portfolio provides access
"(Ins)" Institutional    to the extensive asset allocation and investment
                         management capabilities of PIMCO Advisors L.P. and its
"(Adm)" Administrative   affiliates.


                         90/10 Portfolio

                         Seeks long-term capital appreciation. The Portfolio
                         normally invests approximately 90% of its assets in
                         PIMCO Stock Funds and 10% in PIMCO Bond Funds.


                         60/40 Portfolio

                         Seeks long-term capital appreciation and current
                         income. The Portfolio normally invests approximately
                         60% of its assets in PIMCO Stock Funds and 40% in PIMCO
                         Bond Funds.


                         30/70 Portfolio

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


This cover is not part of the Prospectus.
                                                 [PIMCO FUNDS LOGO APPEARS HERE]

<PAGE>

                   PIMCO Funds Prospectus

                   This Prospectus describes three actively managed mutual fund
PIMCO              Portfolios offered by PIMCO Funds: Multi-Manager Series (the
Funds:             "Trust").
Multi-Manager
Series             Asset Allocation Series -- 90/10 Portfolio

                   Asset Allocation Series -- 60/40 Portfolio

April 3, 2000      Asset Allocation Series -- 30/70 Portfolio

                   Each Portfolio invests in a diversified portfolio of other
                   PIMCO Funds. This Prospectus explains what you should know
                   about the Portfolios before you invest. Please read it
                   carefully.

Share
Classes
Institutional and
Administrative

                   The Securities and Exchange Commission has not approved or
                   disapproved these securities or determined if this
                   Prospectus is truthful or complete. Any representation to
                   the contrary is a criminal offense.

1 PIMCO Funds: Multi-Manager Series
<PAGE>



            Table of Contents

<TABLE>
         <S>                                                                <C>
         Summary Information..............................................    3
         Portfolio Summaries
           90/10 Portfolio................................................    5
           60/40 Portfolio................................................    8
           30/70 Portfolio................................................   11
         Summary of Principal Risks.......................................   14
         Investment Objectives and Principal Investment Strategies........   20
         Underlying Funds.................................................   23
         Other Risk Information...........................................   26
         Management of the Portfolios.....................................   26
         Investment Options - Institutional Class and Administrative Class
          Shares .........................................................   29
         Purchases, Redemptions and Exchanges.............................   30
         How Portfolio Shares Are Priced..................................   33
         Portfolio Distributions..........................................   34
         Tax Consequences.................................................   34
         Financial Highlights.............................................   37
</TABLE>

                                                                   Prospectus  2
<PAGE>

            Summary Information

            The Portfolios are intended for investors who prefer to have their
            asset allocation decisions made by professional money managers.
            Each Portfolio has a distinct investment objective which it seeks
            to achieve by investing within specified equity and fixed income
            targets and ranges among certain Funds in the PIMCO Funds family.
            The Portfolios invest only in Funds in the PIMCO Funds family. The
            PIMCO Funds in which the Portfolios invest are called Underlying
            Funds or Funds in this Prospectus.

              Some of the Underlying Funds invest primarily in equity
            securities and are called Underlying Stock Funds. Other Underlying
            Funds invest primarily in fixed income securities, including money
            market instruments, and are called Underlying Bond Funds. The
            Portfolios are named according to 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 Underlying Bond Funds.

              The table below lists the investment objectives and compares the
            asset allocation strategies of the Portfolios. Other important
            characteristics are described in the individual Portfolio
            Summaries beginning on page 5, and are discussed in greater detail
            under "Investment Objectives and Principal Investment Strategies."
            A "Summary of Principal Risks" begins on page 11.

<TABLE>
<CAPTION>
         PIMCO Funds
         Asset Allocation Series Investment Objective     Allocation Strategy
            ----------------------------------------------------------------------
         <C>                     <C>                      <S>
         90/10 Portfolio         Long-term capital        Under normal conditions,
                                 appreciation             approximately 90% (range
                                                          of 80%-100%) of the
                                                          Portfolio's assets will
                                                          be allocated among
                                                          Underlying Stock Funds
                                                          and 10% (range of 0%-
                                                          20%) among Underlying
                                                          Bond Funds
            ----------------------------------------------------------------------
         60/40 Portfolio         Long-term capital        Under normal conditions,
                                 appreciation and         approximately 60% (range
                                 current income           of 50%-70%) of the
                                                          Portfolio's assets will
                                                          be allocated among
                                                          Underlying Stock Funds
                                                          and 40% (range of 30%-
                                                          50%) among Underlying
                                                          Bond Funds
            ----------------------------------------------------------------------
         30/70 Portfolio         Current income, with     Under normal conditions,
                                 long-term capital        approximately 30% (range
                                 appreciation as          of 25%-35%) of the
                                 a secondary objective    Portfolio's assets will
                                                          be allocated among
                                                          Underlying Stock Funds
                                                          and 70% (range of 65%-
                                                          75%) among Underlying
                                                          Bond Funds
</TABLE>

Risk/Return An investor should choose among the Portfolios based on personal
Comparison  investment objectives, investment time horizon, tolerance for risk
            and personal financial circumstances. Generally speaking,
            historical data suggests that the longer the time horizon, the
            greater the likelihood that the total return of a portfolio that
            invests primarily in equity securities will be higher than the
            total return of a portfolio that invests primarily in fixed income
            securities. However, an equity portfolio is generally subject to
            higher levels of overall risk and price volatility than a fixed
            income portfolio and is considered to be a more aggressive
            investment. Based on these assumptions, the following chart gives
            some indication of the comparative risk/return potential of the
            Portfolios according to their equity/fixed income allocation
            targets and ranges. Note that these assumptions may not be correct
            in future market conditions and the chart may not accurately
            predict the actual comparative risk/return of the Portfolios under
            all market conditions.



                  90/10 Portfolio might be suitable for investors that have a
                  relatively long time horizon, seek long-term capital
                  appreciation potential and have a fairly high tolerance for
                  risk and volatility.

                  60/40 Portfolio might be suitable for investors that have a
                  medium-range time horizon, seek a balance of long-term
                  capital appreciation potential and income and have medium
                  tolerance for risk and volatility.

                  30/70 Portfolio might be suitable for investors that have a
                  shorter time horizon, seek a higher level of income
                  combined with some potential for long-term capital
                  appreciation and have a lower tolerance for risk and
                  volatility.



              It is possible to lose money on investments in the Portfolios.
            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. An
            investment in a Portfolio is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.

3 PIMCO Funds: Multi-Manager Series
<PAGE>

            Summary Information (continued)

Asset       PIMCO Advisors L.P. serves as the investment adviser to the
Allocation  Portfolios. PIMCO Advisors' Asset Allocation Committee determines
Strategies  how each Portfolio allocates and reallocates its assets among the
            Underlying Funds according to the Portfolio's equity/fixed income
            allocation targets and ranges. The Committee attempts to diversify
            each Portfolio's assets broadly among the major asset classes and
            sub-classes represented by the Underlying Funds.

              The major equity asset classes and sub-classes held by the
            Underlying Stock Funds include those categorized by investment
            style/category (growth, blend, value, enhanced index, sector-
            related), region (U.S. equities, international developed markets,
            international emerging markets), and market capitalization (large-
            cap, mid-cap and small-cap). The major fixed income asset classes
            and sub-classes held by the Underlying Bond Funds include those
            categorized by sector/investment specialty (government securities,
            mortgage-related securities, corporate bonds and inflation-indexed
            bonds), region (U.S. fixed income, developed foreign fixed income,
            emerging markets fixed income), credit quality (investment
            grade/money market, medium grade, high yield), and duration (long-
            term, intermediate-term and short-term).

              Please see "Underlying Funds" in this Prospectus for a
            description of the Underlying Funds as categorized by their
            investment styles and main investments.

              The Portfolios may invest in any or all of the Underlying Funds,
            but will not normally invest in every Underlying Fund at any
            particular time. Each Portfolio may invest in shares of the same
            Underlying Funds; however, the percentage of each Portfolio's
            assets so invested will vary depending on the Portfolio's
            investment objective. The Asset Allocation Committee does not
            allocate a Portfolio's assets according to a predetermined blend
            of particular Underlying Funds. Instead, the Committee meets
            regularly to determine the mix of Underlying Funds appropriate for
            each Portfolio by allocating among the asset classes and sub-
            classes held by the Underlying Funds. When making these decisions,
            the Committee considers various quantitative and qualitative data
            relating to the U.S. and foreign economies and securities markets.
            This data includes projected growth trends in the U.S. and foreign
            economies, forecasts for interest rates and the relationship
            between short- and long-term interest rates (yield curve), current
            and projected trends in inflation, relative valuation levels in
            the equity and fixed income markets and various segments within
            those markets, the outlook and projected growth of various
            industrial sectors, information relating to business cycles,
            borrowing trends and the cost of capital, political trends, data
            relating to trade balances and labor information. The Committee
            may also consider proprietary research provided by the investment
            advisers and sub-advisers of the Underlying Funds.

              The Committee then selects representative Underlying Funds for
            each Portfolio to fill out the asset class and sub-class
            weightings it has identified according to the Portfolio's
            equity/fixed income targets and ranges. The Committee has the
            flexibility to reallocate each Portfolio's assets in varying
            percentages among any or all of the Underlying Funds based on the
            Committee's ongoing analyses of the equity and fixed income
            markets, although these tactical shifts are not expected to be
            large or frequent in nature.

"Fund of    The term "fund of funds" is used to describe mutual funds, such as
Funds"      the Portfolios, that pursue their investment objectives by
Structure   investing in other mutual funds. The cost of investing in a
and         Portfolio will generally be higher than the cost of investing in a
Expenses    mutual fund that invests directly in individual stocks and bonds.
            By investing in a Portfolio, an investor will indirectly bear fees
            and expenses charged by the Underlying Funds in which the
            Portfolio invests in addition to the Portfolio's direct fees and
            expenses. In addition, the use of a fund of funds structure could
            affect the timing, amount and character of distibutions to
            shareholders and therefore may increase the amount of taxes
            payable by shareholders.

Portfolio
Descriptions
and Fees
            The following Portfolio Summaries identify each Portfolio's
            investment objective, principal investments and strategies,
            principal risks and fees and expenses. A more detailed "Summary of
            Principal Risks" describing principal risks of investing in the
            Portfolios begins after the Portfolio Summaries. Because the
            Portfolios have not been in operation for a full calendar year, no
            performance information (e.g., a bar chart or average annual total
            returns table) is included for the Portfolios. A fuller discussion
            of the Portfolios' investment strategies and related information
            is included under "Investment Objectives and Principal Investment
            Strategies" in this Prospectus.

                                                                   Prospectus  4
<PAGE>

            90/10 Portfolio
<TABLE>
<S>                                                          <C>                              <C>                  <C>
- -------------------------------------------------------------------------------------------------------------------------

Principal   Investment Objective                             Allocation Strategy                   Target           Range
Investments Seeks long-term capital appreciation             Underlying Stock Funds                 90%           80%-100%
and
Strategies                                                   Underlying Bond Funds                  10%            0%-20%


</TABLE>
            Dividend Frequency
            At least annually


            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 90% (within a range of 80%--100%)
            of its assets in Underlying Stock Funds and approximately 10%
            (within a range of0%--20%) of its assets in Underlying Bond Funds.
            The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers. Please see "Asset Allocation Strategies" on page
            3 for a summary of how the Asset Allocation Committee allocates
            and reallocates the Portfolio's assets among particular Underlying
            Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a relatively
            long time horizon who seeks long-term capital appreciation
            potential and has a fairly high tolerance for risk and volatility.

- --------------------------------------------------------------------------------
Principal   Allocation Risk The Portfolio's investment performance depends
Risks       upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, an investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:

              .Market Risk          .Derivatives Risk   .Interest Rate Risk
              .Issuer Risk          .Foreign Investment .Credit Risk
              .Value Securities     Risk                .High Yield Risk
              Risk                  .Emerging Markets   .Mortgage Risk
              .Growth Securities    Risk                .Management Risk
              Risk                  .Currency Risk
              .Smaller Company      .Focused Investment
              Risk                  Risk
              .Liquidity Risk       .Leveraging Risk

            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.

5 PIMCO Funds: Multi-Manager Series
<PAGE>

            90/10 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance The following shows summary performance information for the
Information Portfolio in a bar chart and an Average Annual Total Returns
            table. The information provides some indication of the risks of
            investing in the Portfolio by showing changes in its performance
            from year to year and by showing how the Portfolio's average
            annual returns compare with the returns of broad-based securities
            market indices and an index of mutual funds. The bar chart, the
            information to its right and the Average Annual Total Returns
            table show performance of the Portfolio's Class A shares, which
            are offered in a different prospectus. This is because the
            Portfolio has not offered Institutional Class or Administrative
            Class shares for a full calendar year. Although Class A,
            Institutional Class and Administrative Class shares would have
            similar returns (because all the Portfolio's shares represent
            interests in the same portfolio of securities), Class A
            performance would be lower than Institutional Class or
            Administrative Class performance because of the higher sales
            charges and/or expenses paid by Class A shares. The returns in the
            bar chart and the information to its right do not reflect the
            impact of sales charges (loads). If they did, the returns would be
            lower than those shown. Unlike the bar chart, performance figures
            for Class A shares in the Average Annual Total Returns table
            reflect the impact of sales charges. For periods prior to the
            inception of Institutional Class and Administrative Class shares
            (2/26/99), the Average Annual Total Returns table also shows
            estimated historical performance for those classes based on the
            performance of the Portfolio's Class A shares. The Class A
            performance has been adjusted to reflect that there are no sales
            charges and lower distribution and/or service (12b-1) fees (if
            any), administrative fees and other expenses paid by Institutional
            Class and Administrative Class shares. Past performance is no
            guarantee of future results.

            Calendar Year Total Returns -- Class A


                     [Return in Bar Chart]        Highest and Lowest Quarter
                                                  Returns (for periods shown
                                                  in the bar chart)
                                                  -----------------------------
                                                  Highest (4th Qtr. '99) 14.32%
                                                  -----------------------------
                     19.00%                       Lowest (3rd Qtr. '99) -3.86%

            [CHART APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                     <C>                  <C>
                                                                      Fund Inception
                                                 1 Year               (9/30/98)(/4/)
            ------------------------------------------------------------------------
         Class A                                 12.50%               22.17%
            ------------------------------------------------------------------------
         Institutional Class                     19.80%               28.62%
            ------------------------------------------------------------------------
         Administrative Class                    19.54%               28.33%
            ------------------------------------------------------------------------
         Russell 3000 Index(/1/)                 20.89%               35.92%
            ------------------------------------------------------------------------
         Blended Index(/2/)                      20.54%               33.44%
            ------------------------------------------------------------------------
         Lipper Growth Fund Average(/3/)         29.25%               44.73%
            ------------------------------------------------------------------------
</TABLE>
            (1)  The Russell 3000 Index is an unmanaged index of the 3,000
                 largest U.S. companies based on total market capitalization.
                 It is not possible to invest directly in the index.
            (2)  The Blended Index represents the blended performance of a
                 hypothetical index made up of 72% Russell 3000 Index, 18%
                 MSCI All Country World ex-U.S. Index and 10% Lehman Brothers
                 Aggregate Bond Index. The Russell 3000 Index is described
                 above. The MSCI All Country World ex-U.S. Index is an
                 unmanaged index of stocks representing both developed and
                 emerging markets but excluding the United States. The Lehman
                 Brothers Aggregate Bond Index is an unmanaged index of
                 investment grade, U.S. dollar-denominated fixed income
                 securities of domestic issuers having a maturity greater than
                 one year. It is not possible to invest directly in these
                 indices.
            (3)  The Lipper Growth Fund Average is a total return performance
                 average of funds tracked by Lipper Analytical Services, Inc.
                 that invest in companies with long-term earnings expected to
                 grow significantly faster than the earnings of the stocks
                 represented in the major unmanaged stock indices. It does not
                 take into account sales charges.
            (4)  The Fund began operations on 9/30/98. Index comparisons begin
                 on 9/30/98.

                                                                   Prospectus  6
<PAGE>

            90/10 Portfolio (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Portfolio:
Portfolio

            Shareholder Fees (fees paid directly from your investment)
                                                         None

            Annual Portfolio Operating Expenses (expenses that are deducted
            from Portfolio assets)

<TABLE>
         <S>             <C>      <C>            <C>            <C>                <C>
                                                          Other Expenses
                                                 ---------------------------------
                                  Distribution                                     Total Annual
                         Advisory and/or Service Administrative Underlying         Portfolio Operating
         Share Class     Fees     (12b-1) Fees   Fees(/1/)      Fund Expenses(/2/) Expenses(/1/)
            ------------------------------------------------------------------------------------------
         Institutional   None     None           0.15%          0.76%              0.91%
            ------------------------------------------------------------------------------------------
         Administrative  None     0.25%          0.15           0.76               1.16
            ------------------------------------------------------------------------------------------
</TABLE>

            (1) The Administrative Fees for the Portfolio do not reflect a
                voluntary fee waiver of 0.05% currently in effect. While the
                fee waiver is in effect, actual Administrative Fees will be
                0.10%, and Total Annual Portfolio Operating Expenses are
                estimated to be as follows: Institutional Class - 0.86%;
                Administrative Class - 1.11%.
            (2) Based on estimated expenses for the current fiscal year.
                Underlying Fund Expenses for the Portfolio are estimated based
                upon a recent allocation of the Portfolio's assets among
                Underlying Funds and upon the total annual operating expenses
                of Institutional Class shares of these Underlying Funds. For a
                listing of the expenses associated with each Underlying Fund,
                please see "Management of the Portfolios--Underlying Fund
                Expenses." Total Annual Portfolio Operating Expenses and the
                Examples set forth below are based on estimates of the
                Underlying Fund Expenses the Portfolio will incur. Actual
                Underlying Fund Expenses for the 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.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Portfolio with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
         <S>                   <C>                <C>                <C>                <C>
         Share Class           Year 1             Year 3             Year 5             Year 10
            -----------------------------------------------------------------------------------
         Institutional         $ 93               $290               $504               $1,120
            -----------------------------------------------------------------------------------
         Administrative         118                368                638                1,409
            -----------------------------------------------------------------------------------
</TABLE>

            Taking into account the Administrative Fees waiver described in
            footnote (1) above, the Examples for Years 1, 3, 5 and 10,
            respectively, are as follows: Institutional Class -- $88, $274,
            $477 and $1,061; Administrative Class -- $113, $353, $612 and
            $1,352.


7 PIMCO Funds: Multi-Manager Series
<PAGE>

            60/40 Portfolio

<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------
<S>                                                          <C>                            <C>                    <C>
Principal   Investment Objective                             Allocation Strategy              Target                 Range
Investments Seeks long-term capital appreciation             Underlying Stock Funds            60%                  50%-70%
and         and current income                               Underlying Bond Funds             40%                  30%-50%
Strategies
</TABLE>

            Dividend Frequency
            Quarterly


            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 60% (within a range of 50%--70%)
            of its assets in Underlying Stock Funds and approximately 40%
            (within a range of 30%--50%) of its assets in Underlying Bond
            Funds. The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers. Please see "Asset Allocation Strategies" on page
            3 for a summary of how the Asset Allocation Committee allocates
            and reallocates the Portfolio's assets among particular Underlying
            Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a medium-range
            time horizon who seeks a balance of long-term capital appreciation
            potential and income and has a medium tolerance for risk and
            volatility.

- --------------------------------------------------------------------------------
Principal   Allocation Risk The Portfolio's investment performance depends
Risks       upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, an investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:

    .  Market Risk            .  Credit Risk               .  Emerging Markets
    .  Issuer Risk            .  High Yield Risk              Risk
    .  Value Securities       .  Mortgage Risk             .  Currency Risk
       Risk                   .  Liquidity Risk            .  Focused Investment
    .  Growth Securities      .  Derivatives Risk             Risk
       Risk                   .  Foreign Investment Risk   .  Leveraging Risk
    .  Smaller Company Risk                                .  Management Risk
    .  Interest Rate Risk


            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.

                                                                 Prospectus    8
<PAGE>

            60/40 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance The following shows summary performance information for the
Information Portfolio in a bar chart and an Average Annual Total Returns
            table. The information provides some indication of the risks of
            investing in the Portfolio by showing changes in its performance
            from year to year and by showing how the Portfolio's average
            annual returns compare with the returns of broad-based securities
            market indices and an index of mutual funds. The bar chart, the
            information to its right and the Average Annual Total Returns
            table show performance of the Portfolio's Class A shares, which
            are offered in a different prospectus. This is because the
            Portfolio has not offered Institutional Class or Administrative
            Class shares for a full calendar year. Although Class A,
            Institutional Class and Administrative Class shares would have
            similar returns (because all the Portfolio's shares represent
            interests in the same portfolio of securities), Class A
            performance would be lower than Institutional Class or
            Administrative Class performance because of the higher sales
            charges and/or expenses paid by Class A shares. The returns in the
            bar chart and the information to its right do not reflect the
            impact of sales charges (loads). If they did, the returns would be
            lower than those shown. Unlike the bar chart, performance figures
            for Class A shares in the Average Annual Total Returns table
            reflect the impact of sales charges. For periods prior to the
            inception of Institutional Class and Administrative Class shares
            (2/26/99), the Average Annual Total Returns table also shows
            estimated historical performance for those classes based on the
            performance of the Portfolio's Class A shares. The Class A
            performance has been adjusted to reflect that there are no sales
            charges and lower distribution and/or service (12b-1) fees (if
            any), administrative fees and other expenses paid by Institutional
            Class and Administrative Class shares. Past performance is no
            guarantee of future results.

            Calendar Year Total Returns -- Class A


              [Return in Bar Chart]         Highest and Lowest Quarter Returns
                     12.03%                 (for periods shown in the bar chart)
                                            ------------------------------------
                                            Highest (4th Qtr.'99)   9.40%
                                            ------------------------------------
                                            Lowest (3rd Qtr. '990  -2.40%

            [CHART APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                          <C>         <C>
                                                                  Fund Inception
                                                      1 Year      (9/30/98)(/5/)
            --------------------------------------------------------------------
         Class A                                        5.87%      13.02%
            --------------------------------------------------------------------
         Institutional Class                           12.71%      18.92%
            --------------------------------------------------------------------
         Administrative Class                          12.43%      18.62%
            --------------------------------------------------------------------
         Russell 3000 Index(/1/)                       20.89%      35.92%
            --------------------------------------------------------------------
         Lehman Brothers Aggregate Bond Index(/2/)     -0.82%      -0.39%
            --------------------------------------------------------------------
         Blended Index(/3/)                            13.12%      21.30%
            --------------------------------------------------------------------
         Lipper Balanced Fund Average(/4/)              8.79%      16.57%
            --------------------------------------------------------------------
</TABLE>
            (1)  The Russell 3000 Index is an unmanaged index of the 3,000
                 largest U.S. companies based on total market capitalization.
                 It is not possible to invest directly in the index.
            (2)  The Lehman Brothers Aggregate Bond Index is an unmanaged
                 index of investment grade, U.S. dollar-denominated fixed
                 income securities of domestic issuers having a maturity
                 greater than one year. It is not possible to invest directly
                 in the index.
            (3)  The Blended Index represents the blended performance of a
                 hypothetical index made up of 48% Russell 3000 Index, 12%
                 MSCI All Country World ex-U.S. Index and 40% Lehman Brothers
                 Aggregate Bond Index. The Russell 3000 Index and Lehman
                 Brothers Aggregate Bond Index are described above. The MSCI
                 All Country World ex-U.S. Index is an unmanaged index of
                 stocks representing both developed and emerging markets but
                 excluding the United States. It is not possible to invest
                 directly in these indices.
            (4)  The Lipper Balanced Fund Average is a total return
                 performance average of funds tracked by Lipper Analytical
                 Services, Inc. whose primary objective is to conserve
                 principal by maintaining at all times a balanced portfolio of
                 both stocks and bonds. It does not take into account sales
                 charges.
            (5)  The Fund began operations on 9/30/98. Index comparisons begin
                 on 9/30/98.

9 PIMCO Funds: Multi-Manager Series
<PAGE>

            60/40 Portfolio (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Portfolio:
Portfolio

            Shareholder Fees (fees paid directly from your investment)
                                                         None

            Annual Portfolio Operating Expenses (expenses that are deducted
            from Portfolio assets)

<TABLE>
         <S>             <C>      <C>            <C>            <C>                <C>
                                                          Other Expenses
                                                 ---------------------------------
                                  Distribution                                     Total Annual
                         Advisory and/or Service Administrative Underlying         Portfolio Operating
         Share Class     Fees     (12b-1) Fees   Fees(/1/)      Fund Expenses(/2/) Expenses(/1/)
            ------------------------------------------------------------------------------------------
         Institutional   None     None           0.15%          0.65%              0.80%
            ------------------------------------------------------------------------------------------
         Administrative  None     0.25%          0.15           0.65               1.05
            ------------------------------------------------------------------------------------------
</TABLE>

            (1)  The Administrative Fees for the Portfolio do not reflect a
                 voluntary fee waiver of 0.05% currently in effect. While the
                 fee waiver is in effect, actual Administrative Fees will be
                 0.10%, and Total Annual Portfolio Operating Expenses are
                 estimated to be as follows: Institutional Class - 0.75%;
                 Administrative Class - 1.00%.
            (2)  Based on estimated expenses for the current fiscal year.
                 Underlying Fund Expenses for the Portfolio are estimated
                 based upon a recent allocation of the Portfolio's assets
                 among Underlying Funds and upon the total annual operating
                 expenses of Institutional Class shares of these Underlying
                 Funds. For a listing of the expenses associated with each
                 Underlying Fund, please see "Management of the Portfolios--
                 Underlying Fund Expenses." Total Annual Portfolio Operating
                 Expenses and the Examples set forth below are based on
                 estimates of the Underlying Fund Expenses the Portfolio will
                 incur. Actual Underlying Fund Expenses for the 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.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Portfolio with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
         <S>                   <C>                <C>                <C>                <C>
         Share Class           Year 1             Year 3             Year 5             Year 10
            -----------------------------------------------------------------------------------
         Institutional         $ 82               $255               $444               $  990
            -----------------------------------------------------------------------------------
         Administrative         107                334                579                1,283
            -----------------------------------------------------------------------------------
</TABLE>

            Taking into account the Administrative Fees waiver described in
            footnote (1) above, the Examples for Years 1, 3, 5 and 10,
            respectively, are as follows: Institutional Class -- $77, $240,
            $417 and $930; Administrative Class -- $102, $318, $552 and
            $1,225.

                                                                   Prospectus 10
<PAGE>

            30/70 Portfolio

- --------------------------------------------------------------------------------


Principal   Investment     Allocation        Target  Range
Investments Objective      Strategy
and         Seeks current  Underlying Stock
Strategies  income, with    Funds             30%   25%-35%
            long-term      Underlying Bond
            capital         Funds             70%   65%-75%
            appreciation as
            a secondary
            objective



            Dividend Frequency
            Monthly

            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 30% (within a range of 25%--35%)
            of its assets in Underlying Stock Funds and approximately 70%
            (within a range of 65%--75%) of its assets in Underlying Bond
            Funds. The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers. Please see "Asset Allocation Strategies" on page
            3 for a summary of how the Asset Allocation Committee allocates
            and reallocates the Portfolio's assets among particular Underlying
            Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a shorter time
            horizon who seeks a higher level of income combined with some
            potential for long-term capital appreciation and has a lower
            tolerance for risk and volatility.

- --------------------------------------------------------------------------------
Principal
Risks       Allocation Risk The Portfolio's investment performance depends
            upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, an investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:

              . Interest Rate Risk . Value Securities      . Emerging Markets
              . Credit Risk          Risk                    Risk
              . High Yield Risk    . Growth Securities     . Currency Risk
              . Mortgage Risk        Risk                  . Focused Investment
              . Market Risk        . Smaller Company         Risk
              . Issuer Risk          Risk                  . Leveraging Risk
                                   . Liquidity Risk        . Management Risk
                                   . Derivatives Risk
                                   . Foreign Investment
                                     Risk

            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.


11 PIMCO Funds: Multi-Manager Series
<PAGE>

            30/70 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance The following shows summary performance information for the
Information Portfolio in a bar chart and an Average Annual Total Returns
            table. The information provides some indication of the risks of
            investing in the Portfolio by showing changes in its performance
            from year to year and by showing how the Portfolio's average
            annual returns compare with the returns of broad-based securities
            market indices and an index of mutual funds. The bar chart, the
            information to its right and the Average Annual Total Returns
            table show performance of the Portfolio's Class A shares, which
            are offered in a different prospectus. This is because the
            Portfolio has not offered Institutional Class or Administrative
            Class shares for a full calendar year. Although Class A,
            Institutional Class and Administrative Class shares would have
            similar returns (because all the Portfolio's shares represent
            interests in the same portfolio of securities), Class A
            performance would be lower than Institutional Class or
            Administrative Class performance because of the higher sales
            charges and/or expenses paid by Class A shares. The returns in the
            bar chart and the information to its right do not reflect the
            impact of sales charges (loads). If they did, the returns would be
            lower than those shown. Unlike the bar chart, performance figures
            for Class A shares in the Average Annual Total Returns table
            reflect the impact of sales charges. For periods prior to the
            inception of Institutional Class and Administrative Class shares
            (2/26/99), the Average Annual Total Returns table also shows
            estimated historical performance for those classes based on the
            performance of the Portfolio's Class A shares. The Class A
            performance has been adjusted to reflect that there are no sales
            charges and lower distribution and/or service (12b-1) fees (if
            any), administrative fees and other expenses paid by Institutional
            Class and Administrative Class shares. Past performance is no
            guarantee of future results.

            Calendar Year Total Returns -- Class A


            [Return in Bar Chart]                           Highest and Lowest
                   4.64%                                    Quarter Returns
                                                            (for periods shown
                                                            in the bar chart)
                                                            --------------------
                                                            Highest (4th Qtr.
                                                            '99) 4.74%
                                                            --------------------
                                                            Lowest (1st Qtr.
                                                            '99) -1.43%

            [CHART APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                          <C>        <C>
                                                                 Fund Inception
                                                      1 Year     (9/30/98)(/4/)
            -------------------------------------------------------------------
         Class A                                      -0.07%      4.73%
            -------------------------------------------------------------------
         Institutional Class                           5.18%      9.22%
            -------------------------------------------------------------------
         Administrative Class                          4.92%      8.94%
            -------------------------------------------------------------------
         Lehman Brothers Aggregate Bond Index(/1/)    -0.82%     -0.39%
            -------------------------------------------------------------------
         Blended Index(/2/)                            6.00%     10.04%
            -------------------------------------------------------------------
         Lipper General Bond Fund Average(/3/)         1.17%      2.88%
            -------------------------------------------------------------------
</TABLE>
            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Blended Index represents the blended performance of a
                hypothetical index made up of 24% Russell 3000 Index, 6% MSCI
                All Country World ex-U.S. Index and 70% Lehman Brothers
                Aggregate Bond Index. The Russell 3000 Index is an unmanaged
                index of the 3,000 largest U.S. companies based on total
                market capitalization. The MSCI All Country World ex-U.S.
                Index is an unmanaged index of stocks representing both
                developed and emerging markets but excluding the United
                States. The Lehman Brothers Aggregate Bond Index is described
                above. It is not possible to invest directly in these indices.
            (3) The Lipper General Bond Fund Average is a total return
                performance average of funds tracked by Lipper Analytical
                Services, Inc. that intend to keep most of their assets in
                corporate and government debt issues and do not have any
                quality or maturity restrictions. It does not take into
                account sales charges.
            (4) The Fund began operations on 9/30/98. Index comparisons begin
                on 9/30/98.

                                                                   Prospectus 12
<PAGE>

            30/70 Portfolio (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Portfolio:
Portfolio

            Shareholder Fees (fees paid directly from your investment)
                                                         None

            Annual Portfolio Operating Expenses (expenses that are deducted
            from Portfolio assets)

<TABLE>
         <S>             <C>      <C>            <C>            <C>                <C>
                                                          Other Expenses
                                                 ---------------------------------
                                  Distribution                                     Total Annual
                         Advisory and/or Service Administrative Underlying         Portfolio Operating
         Share Class     Fees     (12b-1) Fees   Fees(/1/)      Fund Expenses(/2/) Expenses(/1/)
            ------------------------------------------------------------------------------------------
         Institutional   None     None           0.15%          0.55%              0.70%
            ------------------------------------------------------------------------------------------
         Administrative  None     0.25%          0.15           0.55               0.95
            ------------------------------------------------------------------------------------------
</TABLE>

            (1)  The Administrative Fees for the Portfolio do not reflect a
                 voluntary fee waiver of 0.05% currently in effect. While the
                 fee waiver is in effect, actual Administrative Fees will be
                 0.10%, and Total Annual Portfolio Operating Expenses are
                 estimated to be as follows: Institutional Class - 0.65%;
                 Administrative Class - 0.90%.
            (2)  Based on estimated expenses for the current fiscal year.
                 Underlying Fund Expenses for the Portfolio are estimated
                 based upon a recent allocation of the Portfolio's assets
                 among Underlying Funds and upon the total annual operating
                 expenses of Institutional Class shares of these Underlying
                 Funds. For a listing of the expenses associated with each
                 Underlying Fund, please see "Management of the Portfolios--
                 Underlying Fund Expenses." Total Annual Portfolio Operating
                 Expenses and the Examples set forth below are based on
                 estimates of the Underlying Fund Expenses the Portfolio will
                 incur. Actual Underlying Fund Expenses for the 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.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Portfolio with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
         <S>                   <C>                <C>                <C>                <C>
         Share Class           Year 1             Year 3             Year 5             Year 10
            -----------------------------------------------------------------------------------
         Institutional         $72                $224               $390               $   871
            -----------------------------------------------------------------------------------
         Administrative         97                 303                525                 1,166
            -----------------------------------------------------------------------------------
</TABLE>

            Taking into account the Administrative Fees waiver described in
            footnote (1) above, the Examples for Years 1, 3, 5 and 10,
            respectively, are as follows: Institutional Class -- $66, $208,
            $362 and $810; Administrative Class -- $92, $287, $498 and $1,108.

13PIMCO Funds: Multi-Manager Series
<PAGE>

            Summary of Principal Risks

            The value of an investment in a Portfolio changes with the values
            of that Portfolio's investments in the Underlying Funds. Many
            factors can affect those values. The factors that are most likely
            to have a material effect on a particular Portfolio's investments
            as a whole are called "principal risks." The principal risks of
            each Portfolio are identified in the Portfolio Summaries beginning
            on page 5 and are summarized in this section. There is no
            guarantee that a Portfolio will be able to achieve its investment
            objective.

            Allocation Risk

            Each Portfolio's investment performance depends upon how its
            assets are allocated and reallocated among particular Underlying
            Funds according to the Portfolio's equity/fixed income allocation
            targets and ranges. A principal risk of investing in each
            Portfolio is that PIMCO Advisors' Asset Allocation Committee will
            make less than optimal or poor asset allocation decisions. The
            Committee attempts to identify asset classes and sub-classes
            represented by the Underlying Funds that will provide consistent,
            quality performance for the Portfolios, but there is no guarantee
            that the Committee's allocation techniques will produce the
            desired results. It is possible that the Committee will focus on
            Underlying Funds that perform poorly or underperform other
            available Funds under various market conditions. You could lose
            money on your investment in a Portfolio as a result of these
            allocation decisions.

            Underlying Fund Risks

            Because each Portfolio invests all of its assets in Underlying
            Funds, the risks associated with investing in the Portfolios are
            closely related to the risks associated with the securities and
            other investments held by the Underlying Funds. The ability of a
            Portfolio to achieve its investment objective will depend upon the
            ability of the Underlying Funds to achieve their objectives. There
            can be no assurance that the investment objective of any
            Underlying Fund will be achieved.

              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. The extent to which the investment performance and
            risks associated with a particular Portfolio correlate to those of
            a particular Underlying Fund will depend upon the extent to which
            the Portfolio's assets are allocated from time to time for
            investment in the Underlying Fund, which will vary. A Portfolio's
            investment in a particular Underlying Fund may and in some cases
            is expected to exceed 25% of its 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.

              The following summarizes principal risks associated with
            investments in the Underlying Funds and, indirectly, with your
            investment in a Portfolio. Each Underlying Fund may be subject to
            additional principal risks other than those described below
            because the types of investments made by an Underlying Fund can
            change over time. The summary is not intended to be exhaustive.
            For a more complete description of these risks and the securities
            and investment techniques used by the Underlying Funds, please
            refer to the Statement of Additional Information and the
            Underlying Fund prospectuses, which are incorporated herein by
            reference and are available free of charge by telephoning the
            Trust at 1-800-927-4648.

Market      The market price of securities owned by an Underlying Fund may go
Risk        up or down, sometimes rapidly or unpredictably. Securities may
            decline in value due to factors affecting securities markets
            generally or particular industries represented in the securities
            markets. The value of a security may decline due to general market
            conditions which are not specifically related to a particular
            company, such as real or perceived adverse economic conditions,
            changes in the general outlook for corporate earnings, changes in
            interest or currency rates, or adverse investor sentiment
            generally. They may also decline due to factors which affect a
            particular industry or industries, such as labor shortages or
            increased production costs and competitive conditions within an
            industry. Equity securities generally have greater price
            volatility than fixed income securities and the Underlying Stock
            Funds are particularly sensitive to these market risks.

Issuer
Risk
            The value of a security may also decline for a number of reasons
            which directly relate to the issuer, such as management
            performance, financial leverage and reduced demand for the
            issuer's goods or services.

                                                                   Prospectus 14
<PAGE>

Value       Each Underlying Stock Fund may invest in companies that may not be
Securities  expected to experience significant earnings growth, but whose
Risk        securities the Fund's portfolio manager believes are selling at a
            price lower than their true value. PIMCO Equity Income,
            Renaissance, Value, Small-Cap Value, Capital Appreciation, Mid-
            Cap, Small-Cap and Micro-Cap Funds place particular emphasis on
            value securities. Companies that issue value securities may have
            experienced adverse business developments or may be subject to
            special risks that have caused their securities to be out of
            favor. If a portfolio manager's assessment of a company's
            prospects is wrong, or if the market does not recognize the value
            of the company, the price of its securities may decline or may not
            approach the value that the portfolio manager anticipates.

Growth      Each Underlying Stock Fund may invest in equity securities of
Securities  companies that its portfolio manager believes will experience
Risk        relatively rapid earnings growth. PIMCO Growth, Target,
            Opportunity, Capital Appreciation, Mid-Cap, Small-Cap, Micro-Cap,
            International Growth and Innovation Funds place particular
            emphasis on growth securities. Growth securities typically trade
            at higher multiples of current earnings than other securities.
            Therefore, the values of growth securities may be more sensitive
            to changes in current or expected earnings than the values of
            other securities.

Smaller     The general risks associated with equity securities and liquidity
Company     risk are particularly pronounced for securities of companies with
Risk        market capitalizations that are small compared to other publicly
            traded companies. These companies may have limited product lines,
            markets or financial resources or they may depend on a few key
            employees. Securities of smaller companies may trade less
            frequently and in lesser volume than more widely held securities
            and their values may fluctuate more sharply than other securities.
            They may also trade in the over-the-counter market or on a
            regional exchange, or may otherwise have limited liquidity. PIMCO
            Opportunity, Small-Cap, Micro-Cap, Small-Cap Value and Innovation
            Funds generally have substantial exposure to this risk. PIMCO
            Target and Mid-Cap Funds also have significant exposure to this
            risk because they invest substantial assets in companies with
            medium-sized market capitalizations, which are smaller and
            generally less-seasoned than the largest companies. Smaller
            company risk also applies to fixed income securities issued by
            smaller companies and may affect certain investments of the
            Underlying Bond Funds.

Liquidity
Risk        Many of the Underlying Funds are subject to liquidity risk.
            Liquidity risk exists when particular investments are difficult to
            purchase or sell, possibly preventing a Fund from selling out of
            these illiquid securities at an advantageous time or price.
            Underlying Funds with principal investment strategies that involve
            securities of companies with smaller market capitalizations,
            foreign securities, derivatives or securities with substantial
            market and/or credit risk tend to have the greatest exposure to
            liquidity risk.

Derivatives Many of the Underlying Funds may, but are not required to, use a
Risk        number of derivative instruments for risk management purposes or
            as part of their investment strategies. Generally, derivatives are
            financial contracts whose value depends upon, or is derived from,
            the value of an underlying asset, reference rate or index, and may
            relate to stocks, bonds, interest rates, currencies or currency
            exchange rates, commodities, and related indexes. Examples of
            derivative instruments include options contracts, futures
            contracts, options on futures contracts and swap agreements. An
            Underlying Fund's use of derivative instruments involves risks
            different from, or possibly greater than, the risks associated
            with investing directly in securities and other traditional
            investments. Also, an Underlying Fund's portfolio manager may
            decide not to employ any of these strategies and there is no
            assurance that any derivatives strategy used by a Fund will
            succeed.

              A description of the various derivative instruments in which the
            Underlying Funds may invest and the risks associated with each
            instrument is included in the Underlying Fund prospectuses and in
            the Statement of Additional Information. The following provides a
            more general discussion of important risk factors relating to all
            derivative instruments that may be used by the Underlying Funds.

              Management Risk Derivative products are highly specialized
            instruments 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 instrument 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.


15PIMCO Funds: Multi-Manager Series
<PAGE>

              Liquidity Risk Liquidity risk exists when a particular
            derivative instrument is difficult to purchase or sell. If a
            derivative transaction is particularly large or if the relevant
            market is illiquid (as is the case with many privately negotiated
            derivatives), it may not be possible to initiate a transaction or
            liquidate a position at an advantageous time or price.

              Leveraging Risk Because many derivatives have a leverage
            component, adverse changes in the value or level of the underlying
            asset, 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. To limit leveraging risk, the Underlying Funds
            observe asset segregation requirements to cover their obligations
            under derivative instruments.

              Lack of Availability Because the markets for certain derivative
            instruments (including markets located in foreign countries) are
            relatively new and still developing, suitable derivatives
            transactions may not be available in all circumstances for risk
            management or other purposes. There is no assurance that an
            Underlying Fund will engage in derivatives transactions at any
            time or from time to time. A Fund's ability to use derivatives may
            also be limited by certain regulatory considerations.

              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 an
            Underlying Fund's interest. If a portfolio manager incorrectly
            forecasts the values of securities, currencies or interest rates
            or other economic factors in using derivatives for an Underlying
            Fund, the Fund might have been in a better position if it had not
            entered into the transaction at all. 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 other investments of an
            Underlying Fund. An Underlying Fund may also have to buy or sell a
            security at a disadvantageous time or price because the Fund is
            legally required to maintain offsetting positions or asset
            coverage in connection with certain derivatives transactions.

              Other risks in using derivatives include the risk of mispricing
            or improper valuation of derivatives and the inability of
            derivatives to correlate perfectly with underlying assets, rates
            and indexes. Many derivatives, in particular privately negotiated
            derivatives, are complex and often valued subjectively. Improper
            valuations can result in increased cash payment requirements 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 indexes they are
            designed to closely track. In addition, an Underlying Fund's use
            of derivatives may also cause the Fund to realize higher amounts
            of short-term capital gains (taxed at ordinary income tax rates
            when distributed to shareholders who are individuals) than if the
            Fund had not used such instruments.

Foreign     Many Underlying Funds (in particular, PIMCO International,
(non-       International Growth, Structured Emerging Markets, Tax-Efficient
U.S.)       Structured Emerging Markets, Global Bond, Foreign Bond and
Investment  Emerging Markets Bond Funds) invest in securities of foreign
Risk        issuers, securities traded principally in securities markets
            outside the United States and/or securities denominated in foreign
            currencies (together, "foreign securities"). These Funds may
            experience more rapid and extreme changes in value than Funds that
            invest exclusively in securities of U.S. issuers or securities
            that trade exclusively in U.S. markets.

              The securities markets of many foreign countries are relatively
            small, with a limited number of companies representing a small
            number of industries. Foreign securities often trade with less
            frequency and volume than domestic securities and therefore may
            exhibit greater price volatility. Additionally, issuers of foreign
            securities are usually not subject to the same degree of
            regulation as U.S. issuers. Reporting, accounting and auditing
            standards of foreign countries differ, in some cases
            significantly, from U.S. standards. Also, nationalization,
            expropriation or confiscatory taxation, currency blockage,
            political changes or diplomatic developments could adversely
            affect an Underlying Fund's investments in a foreign country. In
            the event of nationalization, expropriation or other confiscation,
            a Fund could lose its entire investment in foreign securities. To
            the extent that an Underlying Fund invests a significant portion
            of its assets in a narrowly defined geographic area such as
            Eastern Europe, South Africa or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments. Adverse conditions in certain regions (such as
            Southeast Asia) can also adversely affect securities of other
            countries whose economies appear to be unrelated. In addition,
            special U.S. tax considerations may apply to an Underlying Fund's
            investment in foreign securities.


                                                                   Prospectus 16
<PAGE>

              Certain Underlying Bond Funds may invest in sovereign debt
            issued by governments, their agencies or instrumentalities, or
            other government-related entities. Holders of sovereign debt may
            be requested to participate in the rescheduling of such debt and
            to extend further loans to governmental entities. In addition,
            there is no bankruptcy proceeding by which defaulted sovereign
            debt may be collected.

Emerging    Certain Underlying Funds (in particular, PIMCO Structured Emerging
Markets     Markets, Tax-Efficient Structured Emerging Markets and Emerging
Risk        Markets Bond Funds) may invest in the securities of issuers based
            in countries with developing or "emerging market" economies. These
            securities may present market, credit, currency, liquidity, legal,
            political and other risks different from, or greater than, the
            risks of investing in developed foreign countries.

Currency    Many Underlying Funds may invest directly in foreign currencies or
Risk        in securities that trade in, or receive revenues in, foreign
            currencies. To the extent that they do so, these Funds are subject
            to the risk that those currencies will decline in value relative
            to the U.S. dollar, or, in the case of hedging positions, that the
            U.S. Dollar will decline in value relative to the currency being
            hedged. PIMCO Global Bond, Foreign Bond, Emerging Markets Bond,
            International, International Growth, Structured Emerging Markets
            and Tax-Efficient Structured Emerging Markets Funds are
            particularly sensitive to currency risk. Currency rates in foreign
            countries may fluctuate significantly over short periods of time
            for a number of reasons, including changes in interest rates,
            intervention (or the failure to intervene) by U.S. or foreign
            governments, central banks or supranational entities such as the
            International Monetary Fund, or by the imposition of currency
            controls or other political developments in the U.S. or abroad.
            For example, significant uncertainty surrounds the 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
            Underlying Fund assets are denominated may be devalued against the
            U.S. dollar, resulting in a loss to such Funds.

Focused     Focusing Fund investments in a small number of issuers, industries
Investment  or foreign currencies increases risk. PIMCO Global Bond, Foreign
Risk        Bond and Emerging Markets Bond Funds are "non-diversified," which
            means that they invest in a smaller number of issuers than
            diversified mutual funds. Other Underlying Funds also normally
            invest in a relatively small number of issuers. In addition, many
            Underlying Bond Funds may invest a substantial portion of their
            assets in the bonds of similar projects or from issuers in the
            same state. To the extent that they focus their investments, the
            Underlying Funds may have more risk because changes in the value
            of a single security or the impact of a single economic, political
            or regulatory occurrence may have a greater adverse impact on the
            Underlying Fund's net asset value. Some of those investments also
            may present substantial credit or other risks. PIMCO
            International, International Growth, Structured Emerging Markets,
            Tax-Efficient Structured Emerging Markets, Global Bond, Foreign
            Bond and Emerging Markets Bond Funds may be subject to increased
            risk to the extent they focus their assets in securities
            denominated in a particular foreign currency or in a narrowly
            defined geographic area outside the U.S. Similarly, PIMCO
            Innovation Fund is vulnerable to events affecting companies which
            use innovative technologies to gain a strategic, competitive
            advantage in their industry and companies that provide and service
            those technologies because it normally concentrates its
            investments in those companies. Also, the Underlying Funds may
            from time to time have greater risk because they invest a
            substantial portion of their assets in related industries such as
            "technology" or "financial and business services."

             Although each Portfolio normally invests in a number of different
            Underlying Funds, to the extent that a Portfolio concentrates a
            significant portion of its assets in a single Underlying Fund, it
            will be particularly sensitive to the risks associated with that
            Fund and any investments in which that Fund concentrates.

Leveraging  Certain Underlying Funds may engage in transactions or purchase
Risk        instruments that give rise to forms of leverage. Such transactions
            and instruments may include, among others, the use of reverse
            repurchase agreements and other borrowings, the investment of
            collateral from loans of portfolio securities, or the use of when-
            issued, delayed-delivery or forward commitment transactions. An
            Underlying Fund's use of derivatives may also involve leverage.
            Leverage, including borrowing, will cause the value of an
            Underlying  Fund's shares to be more volatile that if the Fund did
            not use leverage. This is because leverage tends to exaggerate the
            effect of any increase or decrease in the value of a Fund's
            portfolio securities. The use of leverage may also cause an
            Underlying Fund to liquidate portfolio positions when it may not
            be advantageous to do so in order to satisfy its obligations or to
            meet segregation requirements.


17PIMCO Funds: Multi-Manager Series
<PAGE>

Interest    All of the Underlying Funds that invest in fixed income
Rate Risk   securities, and particularly the Underlying Bond Funds, are
            subject to interest rate risk. Changes in the market values of
            fixed income securities are largely a function of changes in the
            current level of interest rates. The value of an Underlying Fund's
            investments in fixed income securities will typically change as
            the level of interest rates fluctuate. During periods of declining
            interest rates, the value of fixed income securities generally
            rise. Conversely, during periods of rising interest rates, the
            value of fixed income securities generally decline.

             "Duration" is one measure of the expected life of a fixed income
            security that is used to determine the sensitivity of a security's
            price to changes in interest rates. Securities with longer
            durations tend to be more sensitive to changes in interest rates,
            usually making them more volatile than securities with shorter
            durations. Accordingly, Underlying Bond Funds with longer average
            portfolio durations (e.g., PIMCO Long-Term U.S. Government Fund)
            will be more sensitive to changes in interest rates than Funds
            with shorter average portfolio 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 durations
            precisely when that is least advantageous (i.e., when interest
            rates are rising).

             Many Underlying Funds, including most of the Underlying Bond
            Funds, may invest in securities that are particularly sensitive to
            fluctuations in prevailing interest rates and have relatively high
            levels of interest rate risk. These include various mortgage-
            related securities (for instance, the interest-only or "IO" class
            of a stripped mortgage-backed security) and "zero 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).

Credit      All of the Underlying Funds are subject to credit risk. This is
Risk        the risk that the issuer or the guarantor of a fixed income
            security, or the counterparty to a derivatives contract,
            repurchase agreement or a loan of portfolio securities, will be
            unable or unwilling to make timely principal and/or interest
            payments, or to otherwise honor its obligations. Securities are
            subject to varying degrees of credit risk, which are often
            reflecting in credit ratings provided by rating agencies such as
            Moody's Investors Service, Inc. ("Moody's") and Standard & Poor's
            Ratings Services ("S&P").

             The Underlying Funds that invest in fixed income securities
            (particularly the Underlying Bond Funds) 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 governments. Even certain U.S. Government
            securities are subject to credit risk.

High        High yield securities (commonly known as "junk bonds") are fixed
Yield       income securities rated lower than Baa by Moody's or BBB by S&P,
Risk        or unrated securities determined to be of comparable quality.
            Underlying Bond Funds which invest in high yield securities (in
            particular, PIMCO High Yield and Emerging Markets Bond Funds) may
            be subject to greater volatility and higher levels of credit,
            liquidity and other risks than Funds that invest exclusively in
            higher quality fixed income securities (e.g., PIMCO Money Market
            and Long-Term U.S. Government Funds). High yield securities are
            considered predominately speculative with respect to the issuer's
            continuing ability to make principal and interest payments (credit
            risk). High yield securities may also be more susceptible to real
            or perceived adverse economic and competitive industry conditions
            than higher quality fixed income securities. An economic downturn
            or period of rising interest rates could adversely affect the
            market for high yield securities and reduce an Underlying Bond
            Fund's ability to sell its high yield securities (liquidity risk).

Mortgage    Most of the Underlying Bond Funds may invest in mortgage-related
Risk        securities. Rising interest rates tend to extend the duration of
            mortgage-related securities, making them more sensitive to changes
            in interest rates. As a result, in a period of rising interest
            rates, an Underlying Fund that holds mortgage-related securities
            may exhibit additional volatility. This is sometimes referred to
            as extension risk. In addition, mortgage-related securities may
            involve special risks relating to unanticipated rates of
            prepayment on the mortgages underlying the securities. This is
            sometimes referred to as prepayment risk. Declining interest rates
            may tend to increase prepayments, and these prepayments would have
            to be reinvested at the then-prevailing lower interest rates.
            Therefore, an Underlying Fund that holds mortgage-related
            securities may have less potential for capital appreciation during
            periods of declining interest rates than Funds that invest in
            other types of fixed income securities of similar maturities.

                                                                  Prospectus 18
<PAGE>

Management  Each Underlying Fund is subject to management risk because it is
Risk        an actively managed investment portfolio. PIMCO Advisors, Pacific
            Investment Management Company, and the sub-advisers and individual
            portfolio managers of the Underlying Funds will apply investment
            techniques and risk analyses in making investment decisions for
            the Funds, but there can be no guarantee that they will produce
            the desired results.

A Note on   Each Portfolio may invest in PIMCO StocksPLUS Fund. While the
PIMCO       investment objective of that Fund is to achieve a total return
StocksPLUS  which exceeds the total return performance of the S&P 500 Index,
Fund        it does so by investing substantially all of its assets in a
            combination of equity-based (S&P 500 Index) derivative
            instruments, backed by a portfolio of fixed income securities.
            Consequently, the risks of investing in the Fund include
            derivatives risk and the risks generally associated with the
            Underlying Bond Funds. To the extent that the Fund invests in S&P
            500 Index derivatives backed by a portfolio of fixed income
            securities, under certain conditions, generally in a market where
            the value of both S&P 500 Index derivatives and fixed income
            securities are declining, the Fund may experience greater losses
            than would be the case if it were to invest directly in a
            portfolio of S&P 500 Index stocks.

19PIMCO Funds: Multi-Manager Series
<PAGE>

            Investment Objectives and Principal Investment Strategies

            The investment objective and principal investment strategies 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
            managers. 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.

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
            Portfolio's assets will be allocated among Underlying Stock Funds
            and 40% among Underlying Bond Funds.

            30/70 Portfolio seeks current income. Long-term capital
            appreciation is a secondary objective. Under normal conditions,
            approximately 30% of the Portfolio's assets will be allocated
            among Underlying Stock Funds and 70% among Underlying Bond Funds.

             PIMCO Advisors serves as the investment adviser to the
            Portfolios. PIMCO Advisors' Asset Allocation Committee determines
            how each Portfolio allocates and reallocates its assets among the
            Underlying Funds according to the Portfolio's equity/fixed income
            allocation targets and ranges. Please see "Asset Allocation
            Strategies" in the Summary Information section above for a
            description of the allocation strategies and techniques used by
            the Committee. The table below illustrates the equity and fixed
            income allocation targets and typical ranges for each Portfolio
            under normal market conditions.

             Equity and Fixed Income Targets and Ranges
             (as a percentage of each Portfolio's total investments)

<TABLE>
<CAPTION>
                                                             Typical
           PIMCO Funds                            Target     Allocation
           Asset Allocation Series                Allocation Range
               --------------------------------------------------------
           <S>                                    <C>        <C>
           90/10 Portfolio
            Equity--Underlying Stock Funds        90%        80% - 100%
            Fixed Income--Underlying Bond Funds*  10%         0% -  20%
               --------------------------------------------------------
           60/40 Portfolio
            Equity--Underlying Stock Funds        60%        50% -  70%
            Fixed Income--Underlying Bond Funds*  40%        30% -  50%
               --------------------------------------------------------
           30/70 Portfolio
            Equity--Underlying Stock Funds        30%        25% -  35%
            Fixed Income--Underlying Bond Funds*  70%        65% -  75%
</TABLE>

              * The Fixed Income portion may include a money market component
              through investments in PIMCO Money Market Fund.


              Each Portfolio invests all of its assets in Underlying Funds and
            may invest in any or all of the Funds. However, it is expected
            that a Portfolio will invest in only some of the Underlying Funds
            at any particular time. A Portfolio's investment in a particular
            Underlying Fund may exceed 25% of the Portfolio's 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. The particular 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 is also subject to certain investment restrictions
            that are described under "Investment Restrictions" in the
            Statement of Additional Information.

                                                                   Prospectus 20
<PAGE>

Equity      The equity portion of each Portfolio will be allocated among a
Portion     number of Underlying Stock Funds which represent a broad range of
of the      equity-based asset classes and sub-classes and a variety of
Portfolios  investment objectives and strategies. By allocating assets among
            these Funds, the equity portions of the Portfolios can be
            diversified in multiple ways, including the following:

            By Investment Style/Category
              .Growth
              .Blend (Broad Market)
              .Value
              .Enhanced Index
              .Sector-Related

            By Region
              .U.S. Equities
              .International Developed Markets Equities
              .International Emerging Markets Equities

            By Size
              .Large-Cap
              .Mid-Cap
              .Small-Cap

            For a description of the Underlying Stock Funds and their
            investment objectives and strategies, please see "Underlying
            Funds."


Fixed       The fixed income portion of each Portfolio will be allocated among
Income      a number of Underlying Bond Funds which represent a broad range of
Portion     fixed income-based asset classes and sub-classes and a variety of
of the      investment objectives and strategies. By allocating assets among
Portfolios  these Funds, the fixed income portions of the Portfolios can be
            diversified in multiple ways, including the following:

            By Sector/Investment Specialty
              .Governments
              .Mortgages
              .Corporate
              .Inflation-Indexed

            By Region
              .U.S. Fixed Income
              .Developed Foreign Fixed Income
              .Emerging Markets Fixed Income

            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
            investment objectives and strategies, please see "Underlying
            Funds."

Temporary   In response to unfavorable market and other conditions, each
Defensive   Portfolio may invest up to 100% of its assets in PIMCO Money
Strategies  Market Fund (and may deviate from its asset allocation range) for
            temporary defensive purposes. A Portfolio may also borrow money
            for temporary or emergency purposes. These temporary strategies
            would be inconsistent with the Portfolio's investment objective
            and principal investment strategies and may adversely affect the
            Portfolio's ability to achieve its investment objective.

21 PIMCO Funds: Multi-Manager Series
<PAGE>


Portfolio   A change in the securities held by a Portfolio is known as
Turnover    "portfolio turnover." Because PIMCO Advisors does not expect to
            reallocate the Portfolios' assets among the Underlying Funds on a
            frequent 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
            expenses 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
            correspondingly 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. Shareholders in the Portfolios may also bear expenses
            directly or indirectly through sales of securities held by the
            Portfolios and the Underlying Funds which result in realization of
            taxable capital gains. To the extent such gains relate to
            securities held for twelve months or less, such gains will be
            short-term capital gains taxed at ordinary income tax rates when
            distributed to shareholders who are individuals. The trading costs
            and tax effects associated with portfolio turnover may adversely
            affect a Portfolio's performance and the return to shareholders.


Changes     The investment objective, the equity/fixed income allocation
in          targets and ranges, and, unless otherwise noted, other investment
Investment  policies of each Portfolio described in this Prospectus may be
Objectives  changed by the Board of Trustees without shareholder approval. If
and         there is a change in a Portfolio's investment objective,
Policies    allocation target or range, or other investment policies,
            shareholders should consider whether the Portfolio remains an
            appropriate investment in light of their then current financial
            positions and needs.

                                                                   Prospectus 22
<PAGE>

              Underlying Funds

              Each Portfolio invests all of its assets in Underlying Funds.
              Accordingly, each Portfolio's investment performance depends upon
              a favorable allocation among the Underlying Funds as well as the
              ability of the Underlying Funds to achieve their objectives. There
              can be no assurance that the investment objective of any
              Underlying Fund will be achieved. Shares of the Underlying Funds
              are not offered in this Prospectus.

Advisory      PIMCO Advisors serves as investment adviser for each of the
Arrangements  Underlying Stock Funds, except that its affiliate, Pacific
for the       Investment Management Company, is the sole investment adviser to
Underlying    PIMCO StocksPLUS Fund. The PIMCO Equity Advisors division of PIMCO
Funds         Advisors manages the investments of several of the Underlying
              Stock Funds. PIMCO Advisors retains sub-advisory firms to manage
              the portfolios of other Underlying Stock Funds. These firms
              include Cadence Capital Management, NFJ Investment Group and
              Parametric Portfolio Associates, each of which is an affiliate of
              PIMCO Advisors, and Blairlogie Capital Management, which is not an
              affiliate. Pacific Investment Management Company is the sole
              investment adviser to each of the Underlying Bond Funds. For a
              complete description of the advisory and sub-advisory arrangements
              for the Underlying Funds, please see the Statement of Additional
              Information and the Underlying Fund prospectuses, which are
              incorporated herein by reference and are available free of charge
              by telephoning the Trust at 1-800-927-4648.

Underlying    The following provides a concise description of the investment
Stock         objective, main investments and other information about each
Funds         Underlying Stock Fund. 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 Trust at 1-800-927-4648.

<TABLE>
<CAPTION>
                                                                                     Approximate
               PIMCO                Investment            Main                       Number of
               Fund                 Objective             Investments                Holdings
 ---------------------------------------------------------------------------------------------------
  <C>          <C>                  <C>                   <S>                        <C>         <C>
  Growth Stock Growth               Long-term growth of   Common stocks of           35-40
  Funds                             capital;              companies with market
                                    income is an          capitalizations of at
                                    incidental            least $5 billion
                                    consideration
               -------------------------------------------------------------------------------------
               Target               Capital appreciation; Common stocks of           40-60
                                    no                    companies with market
                                    consideration is      capitalizations of
                                    given to income       between $1 billion and
                                                          $10 billion
               -------------------------------------------------------------------------------------
               Opportunity          Capital appreciation; Common stocks of           60-100
                                    no                    companies with market
                                    consideration is      capitalizations of
                                    given to income       between $100 million and
                                                          $2 billion
 ---------------------------------------------------------------------------------------------------
  Blend Stock  Capital Appreciation Growth of capital     Common stocks of           60-100
  Funds                                                   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 of capital     Common stocks of           60-100
                                                          companies with market
                                                          capitalizations of more
                                                          than $500 million
                                                          (excluding the largest
                                                          200 companies) that have
                                                          improving fundamentals
                                                          and whose stock is
                                                          reasonably valued by the
                                                          market
               -------------------------------------------------------------------------------------
               Small-Cap            Growth of capital     Common stocks of           60-100
                                                          companies with market
                                                          capitalizations of more
                                                          than $100 million
                                                          (excluding the largest
                                                          1,000 companies) that
                                                          have improving
                                                          fundamentals and whose
                                                          stock is reasonably
                                                          valued by the market
               -------------------------------------------------------------------------------------
               Micro-Cap            Long-term growth of   Common stocks of           60-100
                                    capital               companies with market
                                                          capitalizations of less
                                                          than $250 million that
                                                          have improving
                                                          fundamentals and whose
                                                          stock is reasonably
                                                          valued by the market
</TABLE>

23PIMCO Funds: Multi-Manager Series
<PAGE>

<TABLE>
<CAPTION>
                                                                                           Approximate
                 PIMCO                    Investment            Main                       Number of
                 Fund                     Objective             Investments                Holdings
 ---------------------------------------------------------------------------------------------------------
  <C>            <C>                      <C>                   <S>                        <C>         <C>
  Value Stock    Equity Income            Current income as a   Income-producing common      40-50
  Funds                                   primary objective;    stocks of companies with
                                          long-term growth of   market capitalizations
                                          capital as a          of more than $2 billion
                                          secondary objective
                 -----------------------------------------------------------------------------------------
                 Renaissance              Long-term growth of   Common stocks of             50-80
                                          capital and income    companies with below-
                                                                average valuations whose
                                                                business fundamentals
                                                                are expected to improve
                 -----------------------------------------------------------------------------------------
                 Value                    Long-term growth of   Common stocks of              40
                                          capital and income    companies with market
                                                                capitalizations of more
                                                                than $2 billion that are
                                                                undervalued relative to
                                                                the market and their
                                                                industry groups
                 -----------------------------------------------------------------------------------------
                 Small-Cap Value          Long-term growth of   Common stocks of              100
                                          capital and income    companies with market
                                                                capitalizations of
                                                                between $100 million and
                                                                $1.5 billion and below-
                                                                average price-to-
                                                                earnings ratios relative
                                                                to the market and their
                                                                industry groups
 ---------------------------------------------------------------------------------------------------------
  Enhanced Index Tax-Efficient Equity     Maximum after-tax     A broadly diversified      More than
  Stock Funds                             growth of capital     portfolio of at least         200
                                                                200 common stocks of
                                                                companies represented in
                                                                the S&P 500 Index with
                                                                market capitalizations
                                                                of more than $5 billion
                 -----------------------------------------------------------------------------------------
                 Enhanced Equity          A total return which  Common stocks               100-200
                                          equals or exceeds the represented in the S&P
                                          total return          500 Index with market
                                          performance of an     capitalizations of more
                                          index (currently the  than $5 billion
                                          S&P 500 Index) that
                                          represents the
                                          performance of a
                                          reasonably broad
                                          spectrum of common
                                          stocks that are
                                          publicly traded in
                                          the U.S.
                 -----------------------------------------------------------------------------------------
                 StocksPLUS               Total return that     S&P 500 stock index           N/A
                                          exceeds that of the   derivatives backed by a
                                          S&P 500 Index         portfolio of short-term
                                                                fixed income securities
 ---------------------------------------------------------------------------------------------------------
  International  International            Capital appreciation  Common stocks of foreign    200-250
  Stock Funds                             through investment in (non-U.S.) issuers
                                          an international      (developed and emerging
                                          portfolio; income is  markets) with market
                                          an incidental         capitalizations of more
                                          consideration         than $500 million
                 -----------------------------------------------------------------------------------------
                 International Growth     Long-term capital     An international            50-100
                                          appreciation          portfolio of common
                                                                stocks
                 -----------------------------------------------------------------------------------------
                 Structured Emerging      Long-term growth of   Common stocks of           More than
                 Markets                  capital               companies located in, or      300
                                                                whose business relates
                                                                to, emerging markets
                 -----------------------------------------------------------------------------------------
                 Tax-Efficient Structured Long-term growth of   Common stocks of           More than
                 Emerging Markets         capital. The Fund     companies located in, or      300
                                          also seeks to achieve whose business relates
                                          superior after-tax    to, emerging markets
                                          returns for its
                                          shareholders by using
                                          a variety of tax-
                                          efficient management
                                          strategies
 ---------------------------------------------------------------------------------------------------------
  Sector-Related Innovation               Capital appreciation; Common stocks of              40
  Stock Funds                             no consideration is   technology-related
                                          given to income       companies with market
                                                                capitalizations of more
                                                                than $200 million
</TABLE>


                                                                   Prospectus 24
<PAGE>


Underlying  The investment objective of each Underlying Bond Fund (except as
Bond        provided below) is to seek to realize maximum total return,
Funds       consistent with preservation of capital and prudent investment
            management. The "total return" sought by most of the Underlying
            Bond Funds will consist of income earned on the Fund's
            investments, plus capital appreciation, if any, which generally
            arises from decreases in interest rates or improving credit
            fundamentals for a particular sector or security. The investment
            objective of PIMCO Real Return Bond Fund is to seek to realize
            maximum real return, consistent with preservation of real capital
            and prudent investment management. "Real return" is a measure of
            the change in purchasing power of money invested in a particular
            investment after adjusting 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 main
            investments 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 Trust at 1-800-927-
            4648.

<TABLE>
<CAPTION>
                                                                                                               Non-U.S. Dollar
                                                                                                               Denominated
                         PIMCO Fund        Main Investments           Duration         Credit Quality(/1/)     Securities(/2/)
             --------------------------------------------------------------------------------------------------------
          <C>            <C>               <S>                        <C>              <C>                     <C>
          Short          Money Market      Money market instruments   less than or     Min 95% Aaa or Prime 1; 0%
          Duration Bond                                               equal to         less than or equal to
          Funds                                                       90 days          5% Aa or Prime 2
                                                                      dollar-weighted
                                                                      average maturity
                      ------------------------------------------------------------------------------------------
                         Short-Term        Money market instruments   0-1 yr           B to Aaa; max 10%       0-5%
                                           and                                         below Baa
                                           short maturity fixed
                                           income
                                           securities
                      ------------------------------------------------------------------------------------------
                         Low Duration      Short maturity fixed       1-3 yrs          B to Aaa; max 10%       0-20%
                                           income                                      below Baa
                                           securities
             --------------------------------------------------------------------------------------------------------
          Intermediate   Moderate Duration Short and intermediate     2-5 yrs          B to Aaa; max 10%       0-20%
          Duration                         maturity                                    below Baa
          Bond Funds                       fixed income securities
                      ------------------------------------------------------------------------------------------
                         Total Return      Intermediate maturity      3-6 yrs          B to Aaa; max 10%       0-20%
                                           fixed income securities                     below Baa
                      ------------------------------------------------------------------------------------------
                         Total Return II   Intermediate maturity      3-6 yrs          Baa to Aaa              0%
                                           fixed
                                           income securities with
                                           quality
                                           and foreign issuer
                                           restrictions
             --------------------------------------------------------------------------------------------------------
          Long Duration  Long-Term U.S.    Long-term maturity fixed   greater than     A to Aaa                0%
          Bond Funds     Government        income                     or equal to
                                           securities                 8 yrs
             --------------------------------------------------------------------------------------------------------
          International  Global Bond       U.S. and foreign           3-7 yrs          B to Aaa; max 10%       25-75%
          Bond Funds                       intermediate                                below Baa
                                           maturity fixed income
                                           securities
                      ------------------------------------------------------------------------------------------
                         Foreign Bond      Intermediate maturity      3-7 yrs          B to Aaa; max 10%     greater than
                                           hedged                                      below Baa             or equal to
                                           foreign fixed income                                                 85%
                                           securities
                      ------------------------------------------------------------------------------------------
                         Emerging Markets  Emerging market fixed      0-8 yrs          B to Aaa              greater than
                         Bond              income                                                            or equal to
                                           securities                                                           80%
             --------------------------------------------------------------------------------------------------------
          High Yield     High Yield        Higher yielding fixed      2-6 yrs          B to Aaa; min 65%       0%
          Bond Funds                       income                                      below Baa
                                           securities
             --------------------------------------------------------------------------------------------------------
          Inflation      Real Return Bond  Inflation-indexed fixed    N/A              B to Aaa; max 10%       0-35%
          Indexed Bond                     income                                      below Baa
          Funds                            securities
</TABLE>
            1. As rated by Moody's Investors Service, Inc., or equivalently
             rated by Standard & Poor's Ratings Services, or if unrated, de-
             termined by Pacific Investment Management Company to be of compa-
             rable quality.
            2. Percentage limitations relate to non-U.S. dollar-denominated
             securities for all Underlying Bond Funds except PIMCO Global
             Bond, Foreign Bond and Emerging Markets Bond Funds. Percentage
             limitations for these three Funds relate to securities of non-
             U.S. issuers, denominated in any currency. Each Underlying Bond
             Fund (except PIMCO Total Return II and Long-Term U.S. Government
             Funds) may invest beyond these limits in U.S. dollar-denominated
             securities of non-U.S. issuers.

              Each Underlying Bond Fund invests 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 issued or
            guaranteed by the U.S. Government, its agencies or
            instrumentalities ("U.S. Government securities"); corporate debt
            securities, including convertible securities and corporate
            commercial paper; mortgage-backed 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; debt
            securities issued by states or local governments and their
            agencies, authorities and other instrumentalities; obligations of
            foreign governments or their subdivisions, agencies and
            instrumentalities; and obligations of international agencies or
            supranational entities.

25PIMCO Funds: Multi-Manager Series
<PAGE>

Other          In addition to purchasing the securities listed above under "Main
Investment     Investments," some or all of the Underlying Funds may to varying
Practices      extents: lend portfolio securities; enter into repurchase
of the         agreements and reverse repurchase agreements; purchase and sell
Underlying     securities on a when-issued or delayed delivery basis; enter into
Funds          forward 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
               agreements; invest in foreign securities; and buy or sell foreign
               currencies 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 "Investment Objectives and Policies" in the
               Statement of Additional Information and the Underlying Fund
               prospectuses, which are incorporated herein by reference and are
               available free of charge by telephoning the Trust at 1-800-927-
               4648.

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.

               Other Risk Information

Potential      PIMCO Advisors has broad discretion to allocate and reallocate
Conflicts      the Portfolios' assets among the Underlying Funds consistent with
of             the Portfolios' investment objectives and policies and asset
Interest       allocation targets and ranges. Although PIMCO Advisors does not
               charge an investment advisory fee for its asset allocation
               services, PIMCO Advisors and its affiliates indirectly receive
               fees (including investment advisory and administrative fees) from
               the Underlying Funds in which the Portfolios invest. 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 Advisors
               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
               fulfilling their fiduciary duties to both the Portfolios and the
               Underlying Funds of the Trust.

               Management of the Portfolios

Investment
Adviser
and
Administrator
               PIMCO Advisors serves as the investment adviser and the
               administrator (serving in its capacity as administrator, the
               "Administrator") for the Portfolios. Subject to the supervision
               of the Board of Trustees, PIMCO Advisors is responsible for
               managing, either directly or through others selected by it, the
               investment activities of the Portfolios and the Portfolios'
               business affairs and other administrative matters.

                 PIMCO Advisors is located at 800 Newport Center Drive, Newport
               Beach, California 92660. Organized in 1987, PIMCO Advisors
               provides investment management and advisory services to private
               accounts of institutional and individual clients and to mutual
               funds. As of December 31, 1999, PIMCO Advisors and its subsidiary
               partnerships had more than $261 billion in assets under
               management.

                 PIMCO Advisors has retained its affiliate, Pacific Investment
               Management Company, to provide various administrative and other
               services required by the Portfolios in its capacity as sub-
               administrator. PIMCO Advisors and the sub-administrator may
               retain other affiliates to provide certain of these services.

                                                                 Prospectus   26
<PAGE>

Asset           PIMCO Advisors' Asset Allocation Committee is responsible for
Allocation      determining how the Portfolios' assets are allocated and
Committee       reallocated from time to time among the Underlying Funds. The
                following provides information about the individuals who
                comprise the Asset Allocation Committee and are primarily
                responsible for making asset allocation and other investment
                decisions for the Portfolios.

<TABLE>
<CAPTION>
          Asset Allocation
          Committee Member     Since* Recent Professional Experience
            ---------------------------------------------------------------------------------------------
<S>                                   <C>
          William D. Cvengros  1998   Chief Executive Officer, President and a Member of the Management
                                      Board of PIMCO Advisors. Previously, he was Chairman of the Board
                                      of Trustees and President of the Trust. He was a Director and
                                      the Vice Chairman and Chief Investment Officer of Pacific Life
                                      Insurance Company from January 1990 to November 1994.
          Timothy R. Clark     1998   Vice President of PIMCO Advisors and a Senior Vice President of
                                      PIMCO Funds Distributors LLC. Previously, he was President of
                                      Katonah Capital Management, Inc. from July 1995 to December 1996
                                      and served in various capacities at Zweig Advisors Inc. from
                                      September 1989 to July 1995.
          Robert S. Venable    1998   Vice President of PIMCO Advisors. Previously, he was a Vice
                                      President and portfolio manager at Pacific Investment Management
                                      Company from August 1992 to August 1996.
          David Young          1998   Vice President and an Account Manager at Pacific Investment
                                      Management Company. He has served in various capacities with
                                      Pacific Investment Management Company and its affiliates since
                                      January 1994. Previously, he was a Vice President and portfolio
                                      manager at Analytic Investment Management, Inc. from September 1988
                                      to January 1994.
</TABLE>
             * Each individual has served on the Committee since the inception
              of each Portfolio in September 1998.

                  It is expected that, on or about May 8, 2000, Messrs. Cvengros
                and Venable will be replaced as members of the Asset Allocation
                Committee by Kenneth W. Corba and John S. Loftus. Mr. Corba is a
                Managing Director and Chief Investment Officer of the PIMCO
                Equity Advisors division of PIMCO Advisors, and a member of the
                Management Board of PIMCO Advisors. Prior to joining PIMCO
                Advisors, he was with Eagle Asset Management from 1995 to 1998,
                serving in various capacities including as Chief Investment
                Officer and Portfolio Manager. He was with Stein Roe & Farnham
                Inc. from 1984 to 1995. Mr. Loftus is a Managing Director of
                Pacific Investment Management Company, where he is a senior
                member of its investment strategy group. Mr. Loftus also heads
                the firm's product management area. Mr. Loftus joined Pacific
                Investment Management Company in 1986.

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 their proportionate share
                of the advisory fees paid to PIMCO Advisors and Pacific
                Investment Management Company by the Underlying Funds in which
                the Portfolios invest. See "Underlying Fund Expenses" below.

Administrative
Fees
                Institutional Class and Administrative Class shareholders of
                each Portfolio pay an administrative fee to PIMCO Advisors,
                computed as a percentage of the Portfolio's assets attributable
                in the aggregate to those classes of shares. PIMCO Advisors, in
                turn, provides or procures administrative services for
                Institutional Class and Administrative Class shareholders and
                also bears the costs of various third-party services required by
                the Portfolios, including audit, custodial, portfolio
                accounting, legal, transfer agency and printing costs.

                The Portfolios were not operational for the entire fiscal year
                ended June 30, 1999. Each Portfolio is obligated to pay monthly
                administrative fees to PIMCO Advisors at an annual rate of 0.15%
                based on the average daily net assets attributable in the
                aggregate to the Portfolio's Institutional Class and
                Administrative Class shares. In order to reduce expenses, PIMCO
                Advisors has voluntarily undertaken to waive a portion of the
                administrative fees it is entitled to receive for Institutional
                Class and Administrative Class shares of each Portfolio until
                further notice. As a result, while the waiver is in effect, each
                Portfolio will pay administrative fees to PIMCO Advisors at the
                annual rate of 0.10%, calculated in the manner specified above.
                The Portfolios also indirectly pay their proportionate share of
                the administrative fees charged by PIMCO Advisors and Pacific
                Investment Management Company to the Underlying Funds in which
                the Portfolios invest. See "Underlying Fund Expenses" below.

Underlying
Fund
Expenses
                The expenses associated with investing in a "fund of funds,"
                such as the Portfolios, are generally higher than those for
                mutual 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.

27 PIMCO Funds: Multi-Manager Series
<PAGE>

              The Portfolios are structured in the following ways to lessen
            the impact of expenses incurred at the Underlying Fund level:

              .  The Portfolios do not pay any fees for asset allocation or
                 advisory services under the Trust's investment advisory
                 agreement.

              .  The Underlying Funds invest in Institutional Class shares of
                 the Underlying Funds, which are not subject to any sales
                 charges or 12b-1 fees.

              The following table summarizes the annual expenses borne by
            Institutional Class shareholders of the Underlying Funds (based on
            estimates for the current fiscal year). Because the Portfolios
            invest in Institutional Class shares of the Underlying Funds,
            shareholders of each Portfolio indirectly 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
            "Fees and Expenses of the Portfolio" in each Portfolio Summary
            above.

<TABLE>
<CAPTION>
                                      Annual Underlying Fund Expenses
                                      (Based on the average daily net assets
                                      attributable
                                      to a Fund's Institutional Class shares):

                                      Advisory Administrative Total Fund
           Underlying Fund            Fees     Fees           Operating Expenses
               ----------------------------------------------------------------
           <S>                        <C>      <C>           <C>
           PIMCO Growth               0.50%    0.25%         0.75%
               ----------------------------------------------------------------
           PIMCO Target               0.55     0.25          0.80
               ----------------------------------------------------------------
           PIMCO Opportunity          0.65     0.25          0.90
               ----------------------------------------------------------------
           PIMCO Capital
            Appreciation              0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Mid-Cap              0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Small-Cap            1.00     0.25          1.25
               ----------------------------------------------------------------
           PIMCO Micro-Cap            1.25     0.25          1.50
               ----------------------------------------------------------------
           PIMCO Equity Income        0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Renaissance          0.60     0.25          0.85
               ----------------------------------------------------------------
           PIMCO Value                0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Small-Cap Value      0.60     0.25          0.85
               ----------------------------------------------------------------
           PIMCO Tax-Efficient
            Equity                    0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Enhanced Equity      0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO StocksPLUS           0.40     0.25          0.65
               ----------------------------------------------------------------
           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 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 Total Return         0.25     0.18          0.43
               ----------------------------------------------------------------
           PIMCO Total Return II      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
               ----------------------------------------------------------------
           PIMCO High Yield           0.25     0.25          0.50
               ----------------------------------------------------------------
           PIMCO Real Return Bond     0.25     0.27          0.52
</TABLE>

Distributor
              The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
              owned subsidiary of PIMCO Advisors. The Distributor, located at
              2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
              registered with the Securities and Exchange Commission.

                                                                   Prospectus 28
<PAGE>

            Investment Options --
            Institutional Class and Administrative Class Shares

            The Trust offers investors Institutional Class and Administrative
            Class shares of the Portfolios in this Prospectus.

             The Trust does not charge any sales charges (loads) or other fees
            in connection with purchases, sales (redemptions) or exchanges of
            Institutional Class or Administrative Class shares. Administrative
            Class shares are generally subject to a higher level of operating
            expenses than Institutional Class shares due to the additional
            service and/or distribution fees paid by Administrative Class
            shares as described below. Therefore, Institutional Class shares
            will generally pay higher dividends and have a more favorable
            investment return than Administrative Class shares.

              . Service and Distribution (12b-1) Fees--Administrative Class
            Shares. The Trust has adopted an Administrative Services Plan and
            a Distribution Plan for the Administrative Class shares of each
            Portfolio. Each Plan has been adopted in accordance with the
            requirements of Rule 12b-1 under the Investment Company Act of
            1940 and is administered in accordance with that rule. However,
            shareholders do not have the voting rights set forth in Rule 12b-1
            with respect to the Administrative Services Plan.

             Each Plan allows the Portfolios to use their Administrative Class
            assets to reimburse financial intermediaries that provide services
            relating to Administrative Class shares. The Distribution Plan
            permits reimbursement for expenses in connection with the
            distribution and marketing of Administrative Class shares and/or
            the provision of shareholder services to Administrative Class
            shareholders. The Administrative Services Plan permits
            reimbursement for services in connection with the administration
            of plans or programs that use Administrative Class shares of the
            Portfolios as their funding medium and for related expenses.

             In combination, the Plans permit a Portfolio to make total
            reimbursements at an annual rate of up to 0.25% of the Portfolio's
            average daily net assets attributable to its Administrative Class
            shares. The same entity may not receive both distribution and
            administrative services fees with respect to the same
            Administrative Class assets, but may receive fees under each Plan
            with respect to separate assets. Because these fees are paid out
            of a Portfolio's Administrative Class assets on an ongoing basis,
            over time they will increase the cost of an investment in
            Administrative Class shares and may cost an investor more than
            other types of sales charges.

              . Arrangements with Service Agents. Institutional Class and
            Administrative Class shares of the Portfolios may 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
            and/or distribution fees paid with respect to Administrative Class
            shares. Service agents may impose additional or different
            conditions than the Trust on purchases, redemptions or exchanges
            of Portfolio shares by their customers. Service agents may also
            independently establish and charge their customers transaction
            fees, account fees and other amounts in connection with purchases,
            sales and redemptions of Portfolio shares in addition to any fees
            charged by the Trust. These additional fees may vary over time and
            would increase the cost of the customer's investment and lower
            investment returns. 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, redemptions and exchanges. Shareholders who
            are customers of service agents should consult their service
            agents for information regarding these fees and conditions.


29PIMCO Funds: Multi-Manager Series
<PAGE>

            Purchases, Redemptions and Exchanges

            Investors may purchase Institutional Class and Administrative
Purchasing  Class shares of the Portfolios at the relevant net asset value
Shares      ("NAV") of that class without a sales charge or other fee.

             Institutional Class shares 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 transaction or other fees with respect to their
            customers' investments in the Portfolios.

             Administrative Class shares are offered primarily through
            employee benefit plan alliances, broker-dealers and other
            intermediaries, and each Portfolio pays service and/or
            distribution fees to these entities for services they provide to
            Administrative Class shareholders.

             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 Portfolio and will not require a Portfolio
            to pay any type of administrative payment per participant account
            to any third party.

              . Investment Minimums. 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 Portfolio. At the discretion of PIMCO
            Advisors, the minimum initial investment may be waived for
            Institutional or Administrative Class shares offered to clients of
            PIMCO Equity Advisors, Cadence, NFJ, Pacific Investment Management
            Company, 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 Institutional Class shares
            offered through fee-based programs sponsored and maintained by a
            registered broker-dealer and approved by the Distributor in which
            each investor pays an asset based fee at an annual rate of at
            least 0.50% of the assets in the account to a financial
            intermediary for investment advisory and/or administrative
            services.

             The Trust and the Distributor may waive the minimum initial
            investment for other categories of investors at their discretion.

             The investment minimums discussed in this section do not apply to
            participants in PIMCO Advisors Portfolio Strategies, a managed
            product sponsored by PIMCO Advisors.

              . Timing of Purchase Orders and Share Price Calculations. A
            purchase order received by the Trust's transfer agent, National
            Financial Data Services (the "Transfer Agent"), prior to the close
            of regular trading (normally 4:00 p.m., Eastern time) on the New
            York Stock Exchange, on a day the Trust is open for business,
            together with payment made in one of the ways described below,
            will be effected at that day's net asset value ("NAV"). An order
            received after the close of regular trading on the New York Stock
            Exchange will be effected at the NAV 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 New York Stock Exchange and
            communicated to the Transfer Agent prior to 9:00 a.m., Eastern
            time, on the following business day will be effected at the NAV
            determined on the prior business day. The Trust is "open for
            business" on each day the New York Stock 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.

              . Initial Investment. Investors may open an account by
            completing and signing a Client Registration Application and
            mailing it to PIMCO Funds at 840 Newport Center Drive, Suite 300,
            Newport Beach, California 92660. A Client Registration Application
            may be obtained by calling 1-800-927-4648.

             Except as described below, an investor may purchase Institutional
            Class and Administrative Class shares only by wiring federal funds
            to the Transfer Agent, National Financial Data Services, 330 West
            9th Street, 4th Floor, Kansas City, Missouri 64105. Before wiring
            federal funds, the investor must telephone the Trust at 1-800-927-
            4648 to receive instructions for wire transfer and must provide
            the following information: name of authorized person, shareholder
            name, shareholder account number, name of Portfolio and share
            class, amount being wired, and wiring bank name.

                                                                   Prospectus 30
<PAGE>

             An investor may purchase shares without first wiring federal
            funds if the proceeds of the investment are derived from an
            advisory account the investor maintains 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.

              . Additional Investments. An investor may purchase additional
            Institutional Class and Administrative Class shares of the
            Portfolios at any time by calling the Trust and wiring federal
            funds to the Transfer Agent as outlined above.

              . Other Purchase Information. Purchases of a Portfolio'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
            Portfolios 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.

             An investor should invest in the Portfolios for long-term
            investment purposes only. The Trust and PIMCO Advisors each
            reserves the right to restrict purchases of Portfolio shares
            (including exchanges) when a pattern of frequent purchases and
            sales made in response to short-term fluctuations in share price
            appears evident. Notice of any such restrictions, if any, will
            vary according to the particular circumstances.

             Institutional Class and Administrative Class shares of the Trust
            are not qualified or registered for sale in all states. Investors
            should inquire as to whether shares of a particular Portfolio are
            available for offer and sale in the investor's 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.

              . Retirement Plans. Shares of the Portfolios 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 Portfolio 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.


Redeeming     . Redemptions by Mail. An investor may redeem (sell)
Shares      Institutional Class and Administrative Class shares by submitting
            a written request to PIMCO Funds at 840 Newport Center Drive,
            Suite 300, Newport Beach, California 92660. The redemption request
            should state the Portfolio 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. An
            investor that elects this option on the Client Registration
            Application (or subsequently in writing) may request redemptions
            of shares by calling the Trust at 1-800-927-4648, by sending a
            facsimile to 1-949-725-6830, or by other means of wire
            communication. Investors should state the Portfolio and class from
            which the shares are to be redeemed, the number 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 Company 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 Company or the Transfer Agent to be genuine. Neither
            the Trust nor the Transfer Agent may be liable for any loss, cost
            or expense for acting on instructions

31PIMCO Funds: Multi-Manager Series
<PAGE>

            (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 Company or the Transfer Agent may request
            certain information in order to verify that the person giving
            instructions is authorized to do so. The Trust or Transfer Agent
            may be liable for any losses due to unauthorized or fraudulent
            telephone transactions if it fails to employ reasonable procedures
            to confirm that instructions communicated by telephone are
            genuine. 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 "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.

              . Timing of Redemption Requests and Share Price Calculations. A
            redemption request received by the Trust or its designee prior to
            the close of regular trading on the New York Stock 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.
            Redemption requests for Portfolio shares are effected at the NAV
            per share next determined after receipt of a redemption request by
            the Trust or its designee. The request must properly identify all
            relevant information, such as account number, redemption amount
            (in dollars or shares) and the Portfolio name, and must be
            executed or initialed by the appropriate signatories.

              . Other Redemption Information. Redemption proceeds 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 New York Stock Exchange is closed,
            or during certain other periods as permitted under the federal
            securities laws.

             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 Portfolio solely in
            cash 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 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 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.

                                                                   Prospectus 32
<PAGE>

             Redemption of Portfolio shares may be suspended when trading on
            the New York Stock Exchange is restricted or during an emergency
            which makes it impracticable for the Portfolios or the Underlying
            Funds to dispose of their securities or to determine fairly the
            value of their net assets, or duing any other period as permitted
            by the Securities and Exchange Commission for the protection of
            investors. Under these and other unusual circumstances, the Trust
            may suspend redemptions or postpone payment for more than seven
            days, as permitted by law.


Exchange    An investor may exchange Institutional Class or Administrative
Privilege   Class shares of a Portfolio for shares of the same class of any
            other Portfolio or other series of the Trust that offers that
            class based on the respective NAVs of the shares involved, subject
            to any restrictions on exchanges set forth in the applicable
            Fund's or series' prospectus(es). An exchange may be made by
            following the redemption procedure described above under
            "Redemptions by Mail" or, if the investor has elected the
            telephone redemption option, by calling the Trust at 1-800-927-
            4648. An investor may also exchange shares of a Portfolio 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 Company. 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.

             An investor may exchange shares only with respect to Portfolios
            or other eligible series that are registered in the investor's
            state of residence or where an exemption from registration is
            available. In addition, an exchange is generally a taxable event
            which will generate capital gains or losses, and special rules may
            apply in computing tax basis when determining gain or loss. See
            "Tax Consequences" in this Prospectus and "Taxation" in the
            Statement of Additional Information.

             The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO Advisors, the purchase would adversely
            affect a Portfolio and its shareholders. In particular, a pattern
            of exchanges characteristic of "market-timing" strategies may be
            deemed by PIMCO Advisors to be detrimental to the Trust or a
            particular Portfolio. Currently, the Trust limits the number of
            "round trip" exchanges investors may make. An investor makes a
            "round trip" exchange when the investor purchases shares of a
            particular Portfolio, 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 exchange back into the shares of the
            originally purchased Portfolio) more than six round trip exchanges
            in any twelve-month period. The Trust reserves the right to impose
            additional restrictions on exchanges at any time, although it will
            attempt to give shareholders 30 days' prior notice whenever it is
            reasonably able to do so.

            How Portfolio Shares Are Priced

            The net asset value ("NAV") of a Portfolio's Institutional Class
            and Administrative Class shares is determined by dividing the
            total value of a Portfolio's portfolio investments and other
            assets attributable to that class, less any liabilities, by the
            total number of shares outstanding of that class.

             The assets of each Portfolio consist of shares of the Underlying
            Funds, which are valued at their respective NAVs at the time of
            valuation of the Portfolios' shares. For purposes of calculating
            the NAV of Underlying Fund shares, portfolio securities and other
            assets of the Funds for which market quotes are available are
            stated at market value. Market value is generally determined on
            the basis of last reported sales prices, or if no sales are
            reported, based on quotes obtained from a quotation reporting
            system, established market makers, or pricing services. Certain
            securities or investments for which daily market quotes are not
            readily available may be valued, pursuant to guidelines
            established by the Board of Trustees of the Underlying Fund, with
            reference to other securities or indices. Short-term investments
            having a maturity of 60 days or less are generally valued at
            amortized cost. Exchange traded options, futures and options on
            futures are valued at the settlement price determined by the
            exchange. Other securities for which market quotes are not readily
            available are valued at fair value as determined in good faith by
            the Fund's Board of Trustees or persons acting at the Board's
            direction.

             Underlying Fund investments initially valued in currencies other
            than the U.S. dollar are converted to U.S. dollars using exchange
            rates obtained from pricing services. As a result, the NAV of an
            Underlying Fund's shares may be affected by changes in the value
            of currencies in relation to the U.S. dollar. The value of
            securities traded in markets outside the United States or
            denominated in currencies other than the U.S. dollar

33PIMCO Funds: Multi-Manager Series
<PAGE>

            may be affected significantly on a day that the New York Stock
            Exchange is closed. As a result, to the extent that a Portfolio
            invests in Underlying Funds that hold foreign securities, the NAV
            of the Portfolio's shares may change at times when you can not
            purchase, redeem or exchange shares.

             Portfolio and Underlying Fund shares are valued at the close of
            regular trading (normally 4:00 p.m., Eastern time) (the "NYSE
            Close") on each day that the New York Stock Exchange is open. For
            purposes of calculating the NAV, the Underlying Funds normally use
            pricing data for domestic equity securities received shortly after
            the NYSE Close and do not normally take into account trading,
            clearances or settlements that take place after the NYSE Close.
            Domestic fixed income and foreign securities are normally priced
            using data reflecting the earlier closing of the principal markets
            for those securities. Information that becomes known to the
            Underlying Funds or their agents after the NAV has been calculated
            on a particular day will not generally be used to retroactively
            adjust the price of a security or the NAV determined earlier that
            day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Underlying Funds may value securities at fair
            value or estimate their value as determined in good faith by the
            Fund's Board of Trustees pursuant to procedures approved by the
            Board of Trustees. Fair valuation may also be used by the
            Underlying Fund's Board of Trustees if extraordinary events occur
            after the close of the relevant market but prior to the NYSE
            Close.

            Portfolio Distributions

            Each Portfolio distributes substantially all of its net investment
            income to shareholders in the form of dividends. A shareholder
            begins earning dividends on Portfolio shares the day after the
            Trust receives the shareholder's purchase payment. 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 Administrative Class shares are expected to be lower than
            dividends on Institutional Class shares as a result of the service
            and/or distribution fees applicable to Administrative Class
            shares. The following shows when each Portfolio intends to declare
            and distribute income dividends to shareholders of record.

<TABLE>
<CAPTION>
          Portfolio             At Least Annually           Quarterly           Monthly
            ---------------------------------------------------------------------------
         <S>                    <C>                         <C>                 <C>
          90/10 Portfolio               .
            ---------------------------------------------------------------------------
          60/40 Portfolio                                       .
            ---------------------------------------------------------------------------
          30/70 Portfolio                                                          .
            ---------------------------------------------------------------------------
</TABLE>

             In addition, each Portfolio distributes any net capital gains it
            earns from the sale of portfolio securities to shareholders no
            less frequently than annually. Net short-term capital gains may be
            paid more frequently.

             A Portfolio's dividend and capital gain distributions with
            respect to a particular class of shares will automatically be
            reinvested in additional shares of the same class of the Portfolio
            at NAV unless the shareholder elects to have the distributions
            paid in cash. A shareholder may elect to have distributions paid
            in cash on the Client Registration Application or by submitting a
            written request, signed by the appropriate signatories, indicating
            the account number, Portfolio name(s) and wiring instructions.
            Shareholders do not pay any sales charges or other fees on shares
            received through the reinvestment of Portfolio distributions.

             For further information on distribution options, please contact
            the Trust at 1-800-927-4648.

            Tax Consequences

             . Taxes on Portfolio Distributions. A shareholder subject to U.S.
            federal income tax will be subject to tax on Portfolio
            distributions whether they are paid in cash or reinvested in
            additional shares of the Portfolios. For federal income tax
            purposes, Portfolio distributions will be taxable to the
            shareholder as either ordinary income or capital gains.

             Portfolio dividends (i.e., distributions of investment income)
            are taxable to shareholders as ordinary income. Federal taxes on
            Portfolio distributions of gains are determined by how long the
            Portfolio owned the investments that generated the gains, rather
            than how long the shareholder owned the shares. Distributions of
            gains from investments that a Portfolio owned for more than 12
            months will generally be taxable to shareholders as capital gains.
            Distributions of gains from investments that the Portfolio owned
            for 12 months or less will generally be taxable as ordinary
            income.

                                                                   Prospectus 34
<PAGE>


             Portfolio distributions are taxable to shareholders even if they
            are paid from income or gains earned by a Portfolio prior to the
            shareholder's investment and thus were included in the price paid
            for the shares. For example, a shareholder who purchases shares on
            or just before the record date of a Portfolio distribution will
            pay full price for the shares and may receive a portion of his or
            her investment back as a taxable distribution.

             The Portfolios' use of a fund of funds structure could affect the
            amount, timing and character of distributions to shareholders. See
            "Taxation--Distributions" in the Statement of Additional
            Information.

             . Taxes on Redemptions or Exchanges of Shares. Any gain resulting
            from the sale of Portfolio shares will generally be subject to
            federal income tax. When a shareholder exchanges shares of a
            Portfolio for shares of another Portfolio or series of the Trust,
            the transaction will be treated as a sale of the first Portfolio's
            shares for these purposes, and any gain on those shares will
            generally be subject to federal income tax.

             This section relates only to federal income tax; the consequences
            under other tax laws may differ. Shareholders should consult their
            tax advisors as to the possible application of foreign, state and
            local income tax laws to Portfolio dividends and capital
            distributions. Please see the Statement of Additional Information
            for additional information regarding the tax aspects of investing
            in the Portfolios.


35PIMCO Funds: Multi-Manager Series
<PAGE>





                      (This page left blank intentionally)

                                                                   Prospectus 36
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help you understand
            the financial performance of Institutional Class and
            Administrative Class shares of each Portfolio since the class of
            shares was first offered. Certain information reflects financial
            results for a single Portfolio share. The total returns in the
            table represent the rate that an investor would have earned or
            lost on an investment in a particular class of shares of a
            Portfolio, assuming reinvestment of all dividends and
            distributions. This information has been audited by
            PricewaterhouseCoopers LLP, whose report, along with each
            Portfolio's financial statements, are included in the Trust's
            annual report to shareholders. The annual report is incorporated
            by reference in the Statement of Additional Information and is
            available free of charge upon request from the Distributor.

<TABLE>
<CAPTION>
                 Net Asset             Net Realized/     Total    Dividends  Distributions
    Year or        Value      Net        Unrealized   Income from  from Net    from Net
    Period       Beginning Investment  Gain (Loss) on Investment  Investment   Realized
     Ended       of Period   Income     Investments   Operations    Income   Capital Gains
- ------------------------------------------------------------------------------------------
<S>              <C>       <C>         <C>            <C>         <C>        <C>
90/10 Portfolio
 Institutional
  Class
  02/26/99-
   06/30/99       $10.91     $0.05(a)      $1.23(a)      $1.28      $ 0.00       $0.00
 Administrative
  Class
  02/26/99-
   06/30/99        10.91      0.04(a)       1.23(a)       1.27        0.00        0.00
60/40 Portfolio
 Institutional
  Class
  02/26/99-
   06/30/99       $10.55     $0.09(a)      $0.73(a)      $0.82      $(0.10)      $0.00
 Administrative
  Class
  02/26/99-
   06/30/99        10.55      0.09(a)       0.72(a)       0.81       (0.09)       0.00
30/70 Portfolio
 Institutional
  Class
  02/26/99-
   06/30/99       $10.09     $0.15(a)      $0.23(a)      $0.38      $(0.14)      $0.00
 Administrative
  Class
  02/26/99-
   06/30/99        10.09      0.14(a)       0.23(a)       0.37       (0.13)       0.00
</TABLE>

- -------
 *Annualized
 (a) Per share amounts based on average number of shares outstanding during the
     period.
 (b) The information provided under Ratio of Expenses to Average Net Assets
     reflects a voluntary fee waiver of 0.05% currently in effect. If this
     waiver was not reflected, Ratio of Expenses to Average Net Assets would be
     0.15% for Institutional Class shares and 0.40% for Administrative Class
     shares of each Portfolio.

37PIMCO Funds: Multi-Manager Series
<PAGE>




<TABLE>
<CAPTION>
                                                                            Ratio of Net
                                                               Ratio of      Investment
Tax Basis                Net Asset               Net Assets   Expenses to   Income (Loss)
Return of      Total     Value End                 End of     Average Net    to Average     Portfolio
 Capital   Distributions of Period Total Return Period (000s)   Assets       Net Assets   Turnover Rate
- -------------------------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>          <C>           <C>           <C>           <C>
  $0.00       $ 0.00      $12.19      11.73%         $11         0.10%*(b)      1.17%*          48%
   0.00         0.00       12.18      11.64           11         0.35*(b)       0.95*           48
  $0.00       $(0.10)     $11.27       7.80%         $11         0.10%*(b)      2.52%*          39%
   0.00        (0.09)      11.27       7.71           11         0.35*(b)       2.44*           39
  $0.00       $(0.14)     $10.33       3.78%         $10         0.10%*(b)      4.20%*          37%
   0.00        (0.13)      10.33       3.70           10         0.35*(b)       4.03*           37
</TABLE>

                                                                   Prospectus 38
<PAGE>





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<PAGE>





                      (This page left blank intentionally)
<PAGE>





                      (This page left blank intentionally)
<PAGE>

            -------------------------------------------------------------------
PIMCO       INVESTMENT ADVISER AND ADMINISTRATOR
Funds:      PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA
Multi-      92660
Manager
Series      -------------------------------------------------------------------
            CUSTODIAN
            State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, MO
            64105

            -------------------------------------------------------------------
            TRANSFER AGENT
            National Financial Data Services, 330 W. 9th Street, 4th Floor,
            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>

For More Information

Two following documents are or will be available that offer further information
on the Portfolios and other series of PIMCO funds: Multi-Manager Series.

Annual/Semi-Annual Reports to Shareholders The Trust's annual and semi-annual
reports include a discussion of the market conditions and investment strategies
that significantly affected the Portfolios' performance during its last fiscal
year or other period.

Statement of Additional Information (SAI) The SAI contains additional
information about the Portfolios.  A current SAI has been filed with the
Securities and Exchange Commission, and is incorporated into this prospectus by
reference.


To request a free copy of these documents or to make inquiries about the
Portfolios, please write or call:

          PIMCO Funds:
          Multi-Manager Series
          840 Newport Center Drive
          Suite 300
          Newport Beach, CA 92660

          Telephone:
          1-800-927-4648
          1-800-987-4626 (PIMCO
          Infolink Audio Response
          Network)

Information about the Trust (including the SAI) can be reviewed and copied at
the Securities and Exchange Commission's Public Reference Room in Washington,
D.C. Information on the operation of the public reference room may be obtained
by calling the Commission at 1-202-942-8090.  You may also access reports and
other information about the Trust on the EDGAR database on the Commission's
Internet site at www.sec.gov, and copies of that information may be obtained,
upon payment of a duplicating fee, by writing the Public Reference Section of
the Commission, Washington, D.C. 20549-6009, or by electronic request at the
following e-mail address: [email protected].  You may need to refer to the
Trust's file number under the Investment Company Act, which is 811-6161.



SEC File Number: 811-6161



    [PIMCO FUNDS LOGO APPEARS HERE]


PIMCO Funds:
Multi-Manager Series

840 Newport Center Drive
Suite 300
Newport Beach, CA 92660
www.pimcofunds.com
<PAGE>

                            PIMCO FUNDS PROSPECTUS


Asset Allocation
Series

April 3, 2000       PIMCO Funds Asset Allocation Series consists of three
                    actively managed mutual funds that invest in a diversified
Share Classes       portfolio of PIMCO Funds. In addition to broad
A     B     C       diversification, each Portfolio provides access to the
                    extensive asset allocation and investment management
                    capabilities of PIMCO Advisors L.P. and its affiliates.


                    90/10 Portfolio

                    Seeks long-term capital appreciation. The Portfolio normally
                    invests approximately 90% of its assets in PIMCO Stock
                    Funds and 10% in PIMCO Bond Funds.


                    60/40 Portfolio

                    Seeks long-term capital appreciation and current income. The
                    Portfolio normally invests approximately 60% of its assets
                    in PIMCO Stock Funds and 40% in PIMCO Bond Funds.


                    30/70 Portfolio

                    Seeks current income, with long-term capital appreciation a
                    secondary objective. The Portfolio normally invests
                    approximately 30% of its assets in PIMCO Stock Funds and 70%
                    in PIMCO Bond Funds.


                                              [LOGO OF PIMCO FUNDS APPEARS HERE]

This cover is not part of the Prospectus.

<PAGE>

            PIMCO Funds Prospectus

PIMCO       This Prospectus describes three actively managed mutual fund
Funds:      Portfolios offered by PIMCO Funds: Multi-Manager Series.
Multi-
Manager
Series


                 Asset Allocation Series -- 90/10 Portfolio

                 Asset Allocation Series -- 60/40 Portfolio

April 3,         Asset Allocation Series -- 30/70 Portfolio
2000

            Each Portfolio invests in a diversified portfolio of other PIMCO
            Funds. This Prospectus explains what you should know about the
            Portfolios before you invest. Please read it carefully.

Share
Classes
A, B
and C

            The Securities and Exchange Commission has not approved or
            disapproved these securities or determined if this Prospectus is
            truthful or complete. Any representation to the contrary is a
            criminal offense.

1 PIMCO Funds: Multi-Manager Series
<PAGE>



            Table of Contents

<TABLE>
         <S>                                                                 <C>
         Summary Information................................................   3
         Portfolio Summaries
           90/10 Portfolio..................................................   5
           60/40 Portfolio..................................................   8
           30/70 Portfolio..................................................  11
         Summary of Principal Risks.........................................  14
         Investment Objectives and Principal Investment Strategies..........  20
         Underlying Funds...................................................  23
         Other Risk Information.............................................  26
         Management of the Portfolios.......................................  27
         Investment Options - Class A, B and C Shares ......................  29
         How Portfolio Shares Are Priced....................................  32
         How to Buy and Sell Shares.........................................  32
         Portfolio Distributions............................................  36
         Tax Consequences...................................................  37
         Financial Highlights...............................................  39
</TABLE>

                                                                   Prospectus  2
<PAGE>

            Summary Information

            The Portfolios are intended for investors who prefer to have their
            asset allocation decisions made by professional money managers.
            Each Portfolio has a distinct investment objective which it seeks
            to achieve by investing within specified equity and fixed income
            targets and ranges among certain Funds in the PIMCO Funds family.
            The Portfolios invest only in Funds in the PIMCO Funds family. The
            PIMCO Funds in which the Portfolios invest are called Underlying
            Funds or Funds in this Prospectus.

              Some of the Underlying Funds invest primarily in equity
            securities and are called Underlying Stock Funds. Other Underlying
            Funds invest primarily in fixed income securities, including money
            market instruments, and are called Underlying Bond Funds. The
            Portfolios are named according to 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 Underlying Bond Funds.

              The table below lists the investment objectives and compares the
            asset allocation strategies of the Portfolios. Other important
            characteristics are described in the individual Portfolio
            Summaries beginning on page 5, and are discussed in greater detail
            under "Investment Objectives and Principal Investment Strategies."
            A "Summary of Principal Risks" begins on page 11.

<TABLE>
<CAPTION>
         PIMCO Funds
         Asset Allocation Series Investment Objective     Allocation Strategy
            ----------------------------------------------------------------------
         <C>                     <C>                      <S>
         90/10 Portfolio         Long-term capital        Under normal conditions,
                                 appreciation             approximately 90% (range
                                                          of 80%-100%) of the
                                                          Portfolio's assets will
                                                          be allocated among
                                                          Underlying Stock Funds
                                                          and 10% (range of 0%-
                                                          20%) among Underlying
                                                          Bond Funds
            ----------------------------------------------------------------------
         60/40 Portfolio         Long-term capital        Under normal conditions,
                                 appreciation and         approximately 60% (range
                                 current income           of 50%-70%) of the
                                                          Portfolio's assets will
                                                          be allocated among
                                                          Underlying Stock Funds
                                                          and 40% (range of 30%-
                                                          50%) among Underlying
                                                          Bond Funds
            ----------------------------------------------------------------------
         30/70 Portfolio         Current income, with     Under normal conditions,
                                 long-term                approximately 30% (range
                                 capital appreciation as  of 25%-35%) of the
                                 a                        Portfolio's assets will
                                 secondary objective      be allocated among
                                                          Underlying Stock Funds
                                                          and 70% (range of 65%-
                                                          75%) among Underlying
                                                          Bond Funds
</TABLE>

Risk/Return You should choose among the Portfolios based on personal
Comparison  investment objectives, investment time horizon, tolerance for risk
            and personal financial circumstances. Generally speaking,
            historical data suggests that the longer the time horizon, the
            greater the likelihood that the total return of a portfolio that
            invests primarily in equity securities will be higher than the
            total return of a portfolio that invests primarily in fixed income
            securities. However, an equity portfolio is generally subject to
            higher levels of overall risk and price volatility than a fixed
            income portfolio and is considered to be a more aggressive
            investment. Based on these assumptions, the following chart gives
            some indication of the comparative risk/return potential of the
            Portfolios according to their equity/fixed income allocation
            targets and ranges. Note that these assumptions may not be correct
            in future market conditions and the chart may not accurately
            predict the actual comparative risk/return of the Portfolios under
            all market conditions.


                  90/10 Portfolio might be suitable if you have a relatively
                  long time horizon, seek long-term capital appreciation
                  potential and have a fairly high tolerance for risk and
                  volatility.

                  60/40 Portfolio might be suitable if you have a medium-
                  range time horizon, seek a balance of long-term capital
                  appreciation potential and income and have medium tolerance
                  for risk and volatility.

                  30/70 Portfolio might be suitable if you have a shorter
                  time horizon, seek a higher level of income combined with
                  some potential for long-term capital appreciation and have
                  a lower tolerance for risk and volatility.


              It is possible to lose money on investments in the Portfolios.
            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. An
            investment in a Portfolio is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.


3 PIMCO Funds: Multi-Manager Series
<PAGE>

             Summary Information (continued)

Asset        PIMCO Advisors L.P. serves as the investment adviser to the
Allocation   Portfolios. PIMCO Advisors' Asset Allocation Committee determines
Strategies   how each Portfolio allocates and reallocates its assets among the
             Underlying Funds according to the Portfolio's equity/fixed income
             allocation targets and ranges. The Committee attempts to diversify
             each Portfolio's assets broadly among the major asset classes and
             sub-classes represented by the Underlying Funds.


               The major equity asset classes and sub-classes held by the
             Underlying Stock Funds include those categorized by investment
             style/category (growth, blend, value, enhanced index, sector-
             related), region (U.S. equities, international developed markets,
             international emerging markets), and market capitalization (large-
             cap, mid-cap and small-cap). The major fixed income asset classes
             and sub-classes held by the Underlying Bond Funds include those
             categorized by sector/investment specialty (government securities,
             mortgage-related securities, corporate bonds and inflation-indexed
             bonds), region (U.S. fixed income, developed foreign fixed income,
             emerging markets fixed income), credit quality (investment
             grade/money market, medium grade, high yield), and duration (long-
             term, intermediate-term and short-term).

               Please see "Underlying Funds" in this Prospectus for a
             description of the Underlying Funds as categorized by their
             investment styles and main investments.

               The Portfolios may invest in any or all of the Underlying Funds,
             but will not normally invest in every Underlying Fund at any
             particular time. Each Portfolio may invest in shares of the same
             Underlying Funds; however, the percentage of each Portfolio's
             assets so invested will vary depending on the Portfolio's
             investment objective. The Asset Allocation Committee does not
             allocate a Portfolio's assets according to a predetermined blend
             of particular Underlying Funds. Instead, the Committee meets
             regularly to determine the mix of Underlying Funds appropriate for
             each Portfolio by allocating among the asset classes and sub-
             classes held by the Underlying Funds. When making these decisions,
             the Committee considers various quantitative and qualitative data
             relating to the U.S. and foreign economies and securities markets.
             This data includes projected growth trends in the U.S. and foreign
             economies, forecasts for interest rates and the relationship
             between short- and long-term interest rates (yield curve), current
             and projected trends in inflation, relative valuation levels in
             the equity and fixed income markets and various segments within
             those markets, the outlook and projected growth of various
             industrial sectors, information relating to business cycles,
             borrowing trends and the cost of capital, political trends, data
             relating to trade balances and labor information. The Committee
             may also consider proprietary research provided by the investment
             advisers and sub-advisers of the Underlying Funds.

               The Committee then selects representative Underlying Funds for
             each Portfolio to fill out the asset class and sub-class
             weightings it has identified according to the Portfolio's
             equity/fixed income targets and ranges. The Committee has the
             flexibility to reallocate each Portfolio's assets in varying
             percentages among any or all of the Underlying Funds based on the
             Committee's ongoing analyses of the equity and fixed income
             markets, although these tactical shifts are not expected to be
             large or frequent in nature.


"Fund of     The term "fund of funds" is used to describe mutual funds, such as
Funds"       the Portfolios, that pursue their investment objectives by
Structure    investing in other mutual funds. Your cost of investing in a
and          Portfolio will generally be higher than the cost of investing in a
Expenses     mutual fund that invests directly in individual stocks and bonds.
             By investing in a Portfolio, you will indirectly bear fees and
             expenses charged by the Underlying Funds in which the Portfolio
             invests in addition to the Portfolio's direct fees and expenses.
             In addition, the use of a fund of funds structure could affect the
             timing, amount and character of distributions to you and therefore
             may increase the amount of taxes payable by you.

Portfolio    The following Portfolio Summaries identify each Portfolio's
Descriptions investment objective, principal investments and strategies,
and Fees     principal risks and fees and expenses. A more detailed "Summary of
             Principal Risks" describing principal risks of investing in the
             Portfolios begins after the Portfolio Summaries. Because the
             Portfolios have not been in operation for a full calendar year, no
             performance information (e.g., a bar chart or average annual total
             returns table) is included for the Portfolios. A fuller discussion
             of the Portfolios' investment strategies and related information
             is included under "Investment Objectives and Principal Investment
             Strategies" in this Prospectus.

                                                                   Prospectus  4
<PAGE>

            90/10 Portfolio

- --------------------------------------------------------------------------------


Principal   Investment
Investments Objective
and         Seeks long-term  Allocation
Strategies  capital          Strategy          Target  Range
            appreciation
                             Underlying Stock
                              Funds             90%   80%-100%
                             Underlying Bond
                              Funds             10%     0%-20%
            Dividend
            Frequency
            At least annually


            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 90% (within a range of 80%-100%)
            of its assets in Underlying Stock Funds and approximately 10%
            (within a range of 0%-20%) of its assets in Underlying Bond Funds.
            The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers.

              Please see "Asset Allocation Strategies" on page 3 for a summary
            of how the Asset Allocation Committee allocates and reallocates
            the Portfolio's assets among particular Underlying Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a relatively
            long time horizon who seeks long-term capital appreciation
            potential and has a fairly high tolerance for risk and volatility.

- --------------------------------------------------------------------------------
Principal   Allocation Risk The Portfolio's investment performance depends
Risks       upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, your investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:

            .Market Risk            .Derivatives Risk        .Interest Rate Risk
            .Issuer Risk            .Foreign Investment Risk
                                                             .Credit Risk
            .Value Securities Risk  .Emerging Markets Risk
                                                             .High Yield Risk
            .Growth Securities Risk .Currency Risk           .Mortgage Risk
            .Smaller Company Risk   .Focused Investment Risk
                                                             .Management Risk
            .Liquidity Risk         .Leveraging Risk

            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.

5 PIMCO Funds: Multi-Manager Series
<PAGE>

            90/10 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance Shown below is summary performance information for the Portfolio
Information in a bar chart and an Average Annual Total Returns table. The
            information provides some indication of the risks of investing in
            the Portfolio by showing changes in its performance from year to
            year and by showing how the Portfolio's average annual returns
            compare with the returns of broad-based securities market indices
            and an index of mutual funds. The bar chart and the information to
            its right show performance of the Portfolio's Class A shares, but
            the returns do not reflect the impact of sales charges (loads). If
            they did, the returns would be lower than those shown. Unlike the
            bar chart, performance for Class A, B and C shares in the Average
            Annual Total Returns table reflects the impact of sales charges.
            Past performance is no guarantee of future results.

            Calendar Year Total Returns -- Class A

                                                             Highest and
                                                             Lowest Quarter
                                                             Returns
                     [Return in Bar Chart]                   (for periods
                                                             shown in the bar
                                                             chart)
                                                             ------------------
                                                             Highest (10/1/99-
                                                             12/31/99___)14.32%
                                                             ------------------
                                                             Lowest (7/1/99-
                     19.00%                                  9/30/99____)-3.86%
                                                         [GRAPH APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                   <C>              <C>
                                                                Portfolio Inception
                                               1 Year           (9/30/98)(/4/)
            -----------------------------------------------------------------------
         Class A                               12.50%           22.17%
            -----------------------------------------------------------------------
         Class B                               13.13%           23.89%
            -----------------------------------------------------------------------
         Class C                               17.02%           26.82%
            -----------------------------------------------------------------------
         Russell 3000 Index(/1/)               20.89%           35.92%
            -----------------------------------------------------------------------
         Blended Index(/2/)                    20.54%           33.44%
            -----------------------------------------------------------------------
         Lipper Growth Fund Average(/3/)       29.25%           44.73%
            -----------------------------------------------------------------------
</TABLE>

            (1) The Russell 3000 Index is an unmanaged index of the 3,000
                largest U.S. companies based on total market capitalization.
                It is not possible to invest directly in the index.
            (2) The Blended Index represents the blended performance of a
                hypothetical index made up of 72% Russell 3000 Index, 18% MSCI
                All Country World ex-U.S. Index and 10% Lehman Brothers
                Aggregate Bond Index. The Russell 3000 Index is described
                above. The MSCI All Country World ex-U.S. Index is an
                unmanaged index of stocks representing both developed and
                emerging markets but excluding the United States. The Lehman
                Brothers Aggregate Bond Index is an unmanaged index of
                investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in these
                indices.
            (3) The Lipper Growth Fund Average is a total return performance
                average of funds tracked by Lipper Analytical Services, Inc.
                that invest in companies with long-term earnings expected to
                grow significantly faster than the earnings of the stocks
                represented in the major unmanaged stock indices. It does not
                take into account sales charges.
            (4) The Portfolio began operations on 9/30/98. Index comparisons
                begin on 9/30/98.

                                                                   Prospectus  6
<PAGE>

            90/10 Portfolio (continued)

- --------------------------------------------------------------------------------
            These tables describe the fees and expenses you may pay if you buy
            and hold Class A, B or C shares of the Portfolio:

Fees and    Shareholder Fees (fees paid directly from your investment)
Expenses
of the
Portfolio

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  5.50%                                            1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (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 "Investment
                Options--Class A, B and C Shares--Contingent Deferred Sales
                Charges (CDSCs)--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

            Annual Portfolio Operating Expenses (expenses that are deducted
            from Portfolio assets)

<TABLE>
         <S>          <C>      <C>               <C>            <C>                <C>
                                                          Other Expenses
                                                 ---------------------------------
                               Distribution                                        Total Annual
                      Advisory and/or Service    Administrative Underlying         Portfolio Operating
         Share Class  Fees     (12b-1) Fees(/1/) Fees(/2/)      Fund Expenses(/3/) Expenses
            ------------------------------------------------------------------------------------------
         Class A      None     0.25%             0.40%          0.76%              1.41%
            ------------------------------------------------------------------------------------------
         Class B      None     1.00              0.40           0.76               2.16
            ------------------------------------------------------------------------------------------
         Class C      None     1.00              0.40           0.76               2.16
            ------------------------------------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and Class
                C shares, a Class B or Class C shareholders may, depending
                upon 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.
            (2) The Administrative Fees are subject to a reduction of 0.05% on
                average net assets attributable in the aggregate to the
                Portfolio's Class A, B and C shares in excess of $2.5 billion.
            (3) Based on estimated expenses for the current fiscal year.
                Underlying Fund Expenses for the Portfolio are estimated based
                upon a recent allocation of the Portfolio's assets among
                Underlying Funds and upon the total annual operating expenses
                of Institutional Class shares of these Underlying Funds. For a
                listing of the expenses associated with each Underlying Fund,
                please see "Management of the Portfolios--Underlying Fund
                Expenses." Total Annual Portfolio Operating Expenses and the
                Examples set forth below are based on estimates of the
                Underlying Fund Expenses the Portfolio will incur. Actual
                Underlying Fund Expenses for the 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.


            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Portfolio with the
            costs of investing in other mutual funds. The Examples assume that
            you invest $10,000 in the noted class of shares for the time
            periods indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
<CAPTION>
                                                                                           Example: Assuming you do not
                      Example: Assuming you redeem your shares at the end of each period   redeem your shares
         <S>          <C>              <C>              <C>              <C>               <C>    <C>    <C>    <C>
         Share Class  Year 1           Year 3           Year 5           Year 10           Year 1 Year 3 Year 5 Year 10
            -----------------------------------------------------------------------------------------------------------
         Class A      $686             $972             $1,279           $2,148            $686   $972   $1,279 $2,148
            -----------------------------------------------------------------------------------------------------------
         Class B       719              976              1,359            2,207             219    676    1,159  2,207
            -----------------------------------------------------------------------------------------------------------
         Class C       319              676              1,159            2,493             219    676    1,159  2,493
            -----------------------------------------------------------------------------------------------------------
</TABLE>
  PIMCO Funds: Multi-Manager Series
7
<PAGE>

            60/40 Portfolio

- --------------------------------------------------------------------------------
Principal   Investment
Investments Objective
and
Strategies

<TABLE>
<CAPTION>   Seeks long-term
            capital           Allocation
            appreciation and  Strategy          Target  Range
            current income    <S>               <C>    <C>
                              Underlying Stock
                               Funds             60%   50%-70%
                              Underlying Bond
                               Funds             40%   30%-50%
</TABLE>

            Dividend
            Frequency
            Quarterly


            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 60% (within a range of 50%-70%)
            of its assets in Underlying Stock Funds and approximately 40%
            (within a range of 30%-50%) of its assets in Underlying Bond
            Funds. The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers.

              Please see "Asset Allocation Strategies" on page 3 for a summary
            of how the Asset Allocation Committee allocates and reallocates
            the Portfolio's assets among particular Underlying Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a medium-range
            time horizon who seeks a balance of long-term capital appreciation
            potential and income and has a medium tolerance for risk and
            volatility.

- --------------------------------------------------------------------------------
Principal   Allocation Risk The Portfolio's investment performance depends
Risks       upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, your investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:

           .Market Risk             .Credit Risk       .Emerging Markets Risk
           .Issuer Risk             .High Yield Risk   .Currency Risk
           .Value Securities Risk   .Mortgage Risk     .Focused Investment Risk
           .Growth Securities Risk  .Liquidity Risk
           .Smaller Company Risk    .Derivatives Risk
           .Interest Rate Risk      .Leveraging Risk
                                    .Foreign Investment Risk

                                                          .Management Risk
            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.

                                                                   Prospectus  8
<PAGE>

            60/40 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance Shown below is summary performance information for the Portfolio
Information in a bar chart and an Average Annual Total Returns table. The
            information provides some indication of the risks of investing in
            the Portfolio by showing changes in its performance from year to
            year and by showing how the Portfolio's average annual returns
            compare with the returns of broad-based securities market indices
            and an index of mutual funds. The bar chart and the information to
            its right show performance of the Portfolio's Class A shares, but
            the returns do not reflect the impact of sales charges (loads). If
            they did, the returns would be lower than those shown. Unlike the
            bar chart, performance for Class A, B and C shares in the Average
            Annual Total Returns table reflects the impact of sales charges.
            Past performance is no guarantee of future results.

            Calendar Year Total Returns -- Class A

                                                             Highest and
                                                             Lowest Quarter
                     [Return in Bar Chart]                   Returns
                                                             (for periods
                                                             shown in the bar
                                                             chart)
                                                             ------------------
                                                             Highest (10/1/99-
                                                             12/31/99_____9.40%)
                                                             ------------------
                                                             Lowest (7/1/99-
                     12.03%                                  9/30/99_____-2.40%)
                                                         [GRAPH APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                        <C>          <C>
                                                                 Portfolio Inception
                                                    1 Year       (9/30/98)(/5/)
            ------------------------------------------------------------------------
         Class A                                     5.87%       13.02%
            ------------------------------------------------------------------------
         Class B                                     6.10%       14.25%
            ------------------------------------------------------------------------
         Class C                                    10.13%       17.35%
            ------------------------------------------------------------------------
         Russell 3000 Index(/1/)                    20.89%       35.92%
            ------------------------------------------------------------------------
         Lehman Brothers Aggregate Bond Index(/2/)  -0.82%       -0.39%
            ------------------------------------------------------------------------
         Blended Index(/3/)                         13.12%       21.30%
            ------------------------------------------------------------------------
         Lipper Balanced Fund Average(/4/)           8.79%       16.57%
            ------------------------------------------------------------------------
</TABLE>

            (1)  The Russell 3000 Index is an unmanaged index of the 3,000
                 largest U.S. companies based on total market capitalization.
                 It is not possible to invest directly in the index.
            (2)  The Lehman Brothers Aggregate Bond Index is an unmanaged
                 index of investment grade, U.S. dollar-denominated fixed
                 income securities of domestic issuers having a maturity
                 greater than one year. It is not possible to invest directly
                 in the index.
            (3)  The Blended Index represents the blended performance of a
                 hypothetical index made up of 48% Russell 3000 Index, 12%
                 MSCI All Country World ex-U.S. Index and 40% Lehman Brothers
                 Aggregate Bond Index. The Russell 3000 Index and Lehman
                 Brothers Aggregate Bond Index are described above. The MSCI
                 All Country World ex-U.S. Index is an unmanaged index of
                 stocks representing both developed and emerging markets but
                 excluding the United States. It is not possible to invest
                 directly in these indices.
            (4)  The Lipper Balanced Fund Average is a total return
                 performance average of funds tracked by Lipper Analytical
                 Services, Inc. whose primary objective is to conserve
                 principal by maintaining at all times a balanced portfolio of
                 both stocks and bonds. It does not take into account sales
                 charges.
            (5)  The Portfolio began operations on 9/30/98. Index comparisons
                 begin on 9/30/98.

9 PIMCO Funds: Multi-Manager Series
<PAGE>

            60/40 Portfolio (continued)

- --------------------------------------------------------------------------------
            These tables describe the fees and expenses you may pay if you buy
            and hold Class A, B or C shares of the Portfolio:

Fees and    Shareholder Fees (fees paid directly from your investment)
Expenses
of the
Portfolio

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  5.50%                                            1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (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 "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.


<TABLE>
         <S>          <C>      <C>               <C>            <C>                <C>
                                                              Other Expenses
                                                 --------------------------------------
                                 Distribution                                             Total Annual
                      Advisory   and/or Service     Administrative   Underlying           Portfolio Operating
         Share Class  Fees       (12b-1) Fees(/1/)  Fees(/2/)        Fund Expenses(/3/)   Expenses
            -------------------------------------------------------------------------------------------------
         Class A      None       0.25%              0.40%            0.65%                1.30%
            -------------------------------------------------------------------------------------------------
         Class B      None       1.00               0.40             0.65                 2.05
            -------------------------------------------------------------------------------------------------
         Class C      None       1.00               0.40             0.65                 2.05
            -------------------------------------------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and Class
                C shares, a Class B or Class C shareholders may, depending
                upon 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.
            (2) The Administrative Fees are subject to a reduction of 0.05% on
                average net assets attributable in the aggregate to the
                Portfolio's Class A, B and C shares in excess of $2.5 billion.
            (3) Based on estimated expenses for the current fiscal year.
                Underlying Fund Expenses for the Portfolio are estimated based
                upon a recent allocation of the Portfolio's assets among
                Underlying Funds and upon the total annual operating expenses
                of Institutional Class shares of these Underlying Funds. For a
                listing of the expenses associated with each Underlying Fund,
                please see "Management of the Portfolios--Underlying Fund
                Expenses." Total Annual Portfolio Operating Expenses and the
                Examples set forth below are based on estimates of the
                Underlying Fund Expenses the Portfolio will incur. Actual
                Underlying Fund Expenses for the 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.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Portfolio with the
            costs of investing in other mutual funds. The Examples assume that
            you invest $10,000 in the noted class of shares for the time
            periods indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
<CAPTION>
                                                                                           Example: Assuming you do not
                      Example: Assuming you redeem your shares at the end of each period   redeem your shares
         <S>          <C>              <C>              <C>              <C>               <C>    <C>    <C>    <C>
         Share Class  Year 1           Year 3           Year 5           Year 10           Year 1 Year 3 Year 5 Year 10
            -----------------------------------------------------------------------------------------------------------
         Class A      $675             $939             $1,224           $2,032            $675   $939   $1,224 $2,032
            -----------------------------------------------------------------------------------------------------------
         Class B       708              943              1,303            2,091             208    643    1,103  2,091
            -----------------------------------------------------------------------------------------------------------
         Class C       308              643              1,103            2,379             208    643    1,103  2,379
            -----------------------------------------------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 10
<PAGE>

            30/70 Portfolio

<TABLE>
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                                     <C>                                         <C>                <C>
Principal   Investment                                   Allocation Strategy                         Target              Range
Investments Objective                                    Underlying Stock Funds                       30%                25%-35%
and         Seeks current income, with                   Underlying Bond Funds                        70%                65%-75%
Strategies  long-term capital appreciation
            as a secondary objective


            Dividend Frequency
            Monthly
</TABLE>


            The Portfolio seeks to achieve its investment objective by
            normally investing approximately 30% (within a range of 25%-35%)
            of its assets in Underlying Stock Funds and approximately 70%
            (within a range of 65%-75%) of its assets in Underlying Bond
            Funds. The Portfolio invests all of its assets in shares of the
            Underlying Funds and does not invest directly in stocks or bonds
            of other issuers.

              Please see "Asset Allocation Strategies" on page 3 for a summary
            of how the Asset Allocation Committee allocates and reallocates
            the Portfolio's assets among particular Underlying Funds.

              The Portfolio may concentrate investments in a particular
            Underlying Fund by investing more than 25% of its assets in that
            Fund.

              Based on the Portfolio's equity/fixed income allocation
            strategy, it might be suitable for an investor with a shorter time
            horizon who seeks a higher level of income combined with some
            potential for long-term capital appreciation and has a lower
            tolerance for risk and volatility.

- --------------------------------------------------------------------------------
Principal   Allocation Risk The Portfolio's investment performance depends
Risks       upon how its assets are allocated and reallocated among particular
            Underlying Funds. A principal risk of investing in the Portfolio
            is that the Asset Allocation Committee's allocation techniques and
            decisions will not produce the desired results, and the Portfolio
            may not achieve its investment objective.

            Underlying Fund Risks The value of your investment in the
            Portfolio is directly related to the investment performance of the
            Underlying Funds in which it invests. Therefore, the principal
            risks of investing in the Portfolio are closely related to the
            principal risks associated with the Underlying Funds and their
            investments. Because the Portfolio's allocation among the
            Underlying Funds will vary, your investment may be subject to any
            and all of these risks at different times and to different
            degrees.

            Among the principal risks of the Underlying Funds, which could
            adversely affect the net asset value, yield and total return of
            the Portfolio, are:


             . Interest Rate Risk . Value Securities Risk   . Emerging Markets
             . Credit Risk        . Growth Securities Risk    Risk
             . High Yield Risk    . Smaller Company Risk    . Currency Risk
             . Mortgage Risk      . Liquidity Risk          . Focused Investment
             . Market Risk        . Derivatives Risk          Risk
             . Issuer Risk        . Foreign Investment Risk . Leveraging Risk
                                                            . Management Risk


            Please see "Summary of Principal Risks" following the Portfolio
            Summaries for a description of these and other risks associated
            with the Underlying Funds and an investment in the Portfolio.


11PIMCO Funds: Multi-Manager Series
<PAGE>

            30/70 Portfolio (continued)

- --------------------------------------------------------------------------------
Performance Shown below is summary performance information for the Portfolio
Information in a bar chart and an Average Annual Total Returns table. The
            information provides some indication of the risks of investing in
            the Portfolio by showing changes in its performance from year to
            year and by showing how the Portfolio's average annual returns
            compare with the returns of broad-based securities market indices
            and an index of mutual funds. The bar chart and the information to
            its right show performance of the Portfolio's Class A shares, but
            the returns do not reflect the impact of sales charges (loads). If
            they did, the returns would be lower than those shown. Unlike the
            bar chart, performance for Class A, B and C shares in the Average
            Annual Total Returns table reflects the impact of sales charges.
            Past performance is no guarantee of future results.

            Calendar Year Total Returns -- Class A

            [Return in Bar Chart]          Highest and Lowest Quarter Returns
                                           (for periods shown in the bar chart)
                                           ------------------------------------
                                           Highest (10/1/99-12/31/99)    4.74%
                                           ------------------------------------
            4.64%                          Lowest (1/1/99-3/31/99)      -1.43%

                                                         [GRAPH APPEARS HERE]
                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                        <C>     <C>
                                                            Portfolio Inception
                                                    1 Year  (9/30/98)(/4/)
            -------------------------------------------------------------------
         Class A                                    -0.07%    4.73%
            -------------------------------------------------------------------
         Class B                                    -1.10%    4.66%
            -------------------------------------------------------------------
         Class C                                     2.91%    7.82%
            -------------------------------------------------------------------
         Lehman Brothers Aggregate Bond Index(/1/)  -0.82%   -0.39%
            -------------------------------------------------------------------
         Blended Index(/2/)                           6.00%   10.04%
            -------------------------------------------------------------------
         Lipper General Bond Fund Average(/3/)        1.17%    2.88%
            -------------------------------------------------------------------
</TABLE>

            (1)  The Lehman Brothers Aggregate Bond Index is an unmanaged
                 index of investment grade, U.S. dollar-denominated fixed
                 income securities of domestic issuers having a maturity
                 greater than one year. It is not possible to invest directly
                 in the index.
            (2)  The Blended Index represents the blended performance of a
                 hypothetical index made up of 24% Russell 3000 Index, 6% MSCI
                 All Country World ex-U.S. Index and 70% Lehman Brothers
                 Aggregate Bond Index. The Russell 3000 Index is an unmanaged
                 index of the 3,000 largest U.S. companies based on total
                 market capitalization. The MSCI All Country World ex-U.S.
                 Index is an unmanaged index of stocks representing both
                 developed and emerging markets but excluding the United
                 States. The Lehman Brothers Aggregate Bond Index is described
                 above. It is not possible to invest directly in these
                 indices.
            (3)  The Lipper General Bond Fund Average is a total return
                 performance average of funds tracked by Lipper Analytical
                 Services, Inc. that intend to keep most of their assets in
                 corporate and government debt issues and do not have any
                 quality or maturity restrictions. It does not take into
                 account sales charges.
            (4)  The Portfolio began operations on 9/30/98. Index comparisons
                 begin on 9/30/98.

                                                                   Prospectus 12
<PAGE>

            30/70 Portfolio (continued)

- --------------------------------------------------------------------------------
            These tables describe the fees and expenses you may pay if you buy
            and hold Class A, B or C shares of the Portfolio:

Fees and    Shareholder Fees (fees paid directly from your investment)
Expenses
of the
Portfolio

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.50%                                            1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (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 "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

            Annual Portfolio Operating Expenses (expenses that are deducted
            from Portfolio assets)

<TABLE>
         <S>          <C>      <C>               <C>            <C>                <C>
                                                          Other Expenses
                                                 ---------------------------------
                               Distribution                                        Total Annual
                      Advisory and/or Service    Administrative Underlying         Portfolio Operating
         Share Class  Fees     (12b-1) Fees(/1/) Fees(/2/)      Fund Expenses(/3/) Expenses
            ------------------------------------------------------------------------------------------
         Class A      None     0.25%             0.40%          0.55%              1.20%
            ------------------------------------------------------------------------------------------
         Class B      None     1.00              0.40           0.55               1.95
            ------------------------------------------------------------------------------------------
         Class C      None     1.00              0.40           0.55               1.95
            ------------------------------------------------------------------------------------------
</TABLE>

            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholders may,
                 depending upon 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.
            (2)  The Administrative Fees are subject to a reduction of 0.05%
                 on average net assets attributable in the aggregate to the
                 Portfolio's Class A, B, and C shares in excess of $2.5
                 billion.
            (3)  Based on estimated expenses for the current fiscal year.
                 Underlying Fund Expenses for the Portfolio are estimated
                 based upon a recent allocation of the Portfolio's assets
                 among Underlying Funds and upon the total annual operating
                 expenses of Institutional Class shares of these Underlying
                 Funds. For a listing of the expenses associated with each
                 Underlying Fund, please see "Management of the Portfolios--
                 Underlying Fund Expenses." Total Annual Portfolio Operating
                 Expenses and the Examples set forth below are based on
                 estimates of the Underlying Fund Expenses the Portfolio will
                 incur. Actual Underlying Fund Expenses for the 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.


            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Portfolio with the
            costs of investing in other mutual funds. The Examples assume that
            you invest $10,000 in the noted class of shares for the time
            periods indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the
            Portfolio's operating expenses remain the same. Although your
            actual costs may be higher or lower, the Examples show what your
            costs would be based on these assumptions.

<TABLE>
<CAPTION>
                                                                                           Example: Assuming you do not
                      Example: Assuming you redeem your shares at the end of each period   redeem your shares
         <S>          <C>              <C>              <C>              <C>               <C>    <C>    <C>    <C>
         Share Class  Year 1           Year 3           Year 5           Year 10           Year 1 Year 3 Year 5 Year 10
            -----------------------------------------------------------------------------------------------------------
         Class A      $567             $814             $1,080           $1,839            $567   $814   $1,080 $1,839
            -----------------------------------------------------------------------------------------------------------
         Class B       698              912              1,252            1,984             198    612    1,052  1,984
            -----------------------------------------------------------------------------------------------------------
         Class C       298              612              1,052            2,275             198    612    1,052  2,275
            -----------------------------------------------------------------------------------------------------------
</TABLE>
13 PIMCO Funds: Multi-Manager Series
<PAGE>

            Summary of Principal Risks

            The value of your investment in a Portfolio changes with the
            values of that Portfolio's investments in the Underlying Funds.
            Many factors can affect those values. The factors that are most
            likely to have a material effect on a particular Portfolio's
            investments as a whole are called "principal risks." The principal
            risks of each Portfolio are identified in the Portfolio Summaries
            beginning on page 5 and are summarized in this section. There is
            no guarantee that a Portfolio will be able to achieve its
            investment objective.

            Allocation Risk

            Each Portfolio's investment performance depends upon how its
            assets are allocated and reallocated among particular Underlying
            Funds according to the Portfolio's equity/fixed income allocation
            targets and ranges. A principal risk of investing in each
            Portfolio is that PIMCO Advisors' Asset Allocation Committee will
            make less than optimal or poor asset allocation decisions. The
            Committee attempts to identify asset classes and sub-classes
            represented by the Underlying Funds that will provide consistent,
            quality performance for the Portfolios, but there is no guarantee
            that the Committee's allocation techniques will produce the
            desired results. It is possible that the Committee will focus on
            Underlying Funds that perform poorly or underperform other
            available Funds under various market conditions. You could lose
            money on your investment in a Portfolio as a result of these
            allocation decisions.

            Underlying Fund Risks

            Because each Portfolio invests all of its assets in Underlying
            Funds, the risks associated with investing in the Portfolios are
            closely related to the risks associated with the securities and
            other investments held by the Underlying Funds. The ability of a
            Portfolio to achieve its investment objective will depend upon the
            ability of the Underlying Funds to achieve their objectives. There
            can be no assurance that the investment objective of any
            Underlying Fund will be achieved.

              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. The extent to which the investment performance and
            risks associated with a particular Portfolio correlate to those of
            a particular Underlying Fund will depend upon the extent to which
            the Portfolio's assets are allocated from time to time for
            investment in the Underlying Fund, which will vary. A Portfolio's
            investment in a particular Underlying Fund may and in some cases
            is expected to exceed 25% of its 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.

              The following summarizes principal risks associated with
            investments in the Underlying Funds and, indirectly, with your
            investment in a Portfolio. Each Underlying Fund may be subject to
            additional principal risks other than those described below
            because the types of investments made by an Underlying Fund can
            change over time. The summary is not intended to be exhaustive.
            For a more complete description of these risks and the securities
            and investment techniques used by the Underlying Funds, please
            refer to the Statement of Additional Information and 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.

Market      The market price of securities owned by an Underlying Fund may go
Risk        up or down, sometimes rapidly or unpredictably. Securities may
            decline in value due to factors affecting securities markets
            generally or particular industries represented in the securities
            markets. The value of a security may decline due to general market
            conditions which are not specifically related to a particular
            company, such as real or perceived adverse economic conditions,
            changes in the general outlook for corporate earnings, changes in
            interest or currency rates, or adverse investor sentiment
            generally. They may also decline due to factors which affect a
            particular industry or industries, such as labor shortages or
            increased production costs and competitive conditions within an
            industry. Equity securities generally have greater price
            volatility than fixed income securities and the Underlying Stock
            Funds are particularly sensitive to these market risks.

Issuer
Risk
            The value of a security may also decline for a number of reasons
            which directly relate to the issuer, such as management
            performance, financial leverage and reduced demand for the
            issuer's goods or services.

                                                                   Prospectus 14
<PAGE>

Value       Each Underlying Stock Fund may invest in companies that may not be
Securities  expected to experience significant earnings growth, but whose
Risk        securities the Fund's portfolio manager believes are selling at a
            price lower than their true value. PIMCO Equity Income,
            Renaissance, Value, Small-Cap Value, Capital Appreciation, Mid-
            Cap, Small-Cap and Micro-Cap Funds place particular emphasis on
            value securities. Companies that issue value securities may have
            experienced adverse business developments or may be subject to
            special risks that have caused their securities to be out of
            favor. If a portfolio manager's assessment of a company's
            prospects is wrong, or if the market does not recognize the value
            of the company, the price of its securities may decline or may not
            approach the value that the portfolio manager anticipates.

Growth      Each Underlying Stock Fund may invest in equity securities of
Securities  companies that its portfolio manager believes will experience
Risk        relatively rapid earnings growth. PIMCO Growth, Target,
            Opportunity, Capital Appreciation, Mid-Cap, Small-Cap, Micro-Cap,
            International Growth and Innovation Funds place particular
            emphasis on growth securities. Growth securities typically trade
            at higher multiples of current earnings than other securities.
            Therefore, the values of growth securities may be more sensitive
            to changes in current or expected earnings than the values of
            other securities.

Smaller     The general risks associated with equity securities and liquidity
Company     risk are particularly pronounced for securities of companies with
Risk        market capitalizations that are small compared to other publicly
            traded companies. These companies may have limited product lines,
            markets or financial resources or they may depend on a few key
            employees. Securities of smaller companies may trade less
            frequently and in lesser volume than more widely held securities
            and their values may fluctuate more sharply than other securities.
            They may also trade in the over-the-counter market or on a
            regional exchange, or may otherwise have limited liquidity. PIMCO
            Opportunity, Small-Cap, Micro-Cap, Small-Cap Value and Innovation
            Funds generally have substantial exposure to this risk. PIMCO
            Target and Mid-Cap Funds also have significant exposure to this
            risk because they invest substantial assets in companies with
            medium-sized market capitalizations, which are smaller and
            generally less-seasoned than the largest companies. Smaller
            company risk also applies to fixed income securities issued by
            smaller companies and may affect certain investments of the
            Underlying Bond Funds.

Liquidity   Many of the Underlying Funds are subject to liquidity risk.
Risk        Liquidity risk exists when particular investments are difficult to
            purchase or sell, possibly preventing a Fund from selling out of
            these illiquid securities at an advantageous time or price.
            Underlying Funds with principal investment strategies that involve
            securities of companies with smaller market capitalizations,
            foreign securities, derivatives or securities with substantial
            market and/or credit risk tend to have the greatest exposure to
            liquidity risk.

Derivatives
Risk        Many of the Underlying Funds may, but are not required to, use a
            number of derivative instruments for risk management purposes or
            as part of their investment strategies. Generally, derivatives are
            financial contracts whose value depends upon, or is derived from,
            the value of an underlying asset, reference rate or index, and may
            relate to stocks, bonds, interest rates, currencies or currency
            exchange rates, commodities, and related indexes. Examples of
            derivative instruments include options contracts, futures
            contracts, options on futures contracts and swap agreements. An
            Underlying Fund's use of derivative instruments involves risks
            different from, or possibly greater than, the risks associated
            with investing directly in securities and other traditional
            investments. Also, an Underlying Fund's portfolio manager may
            decide not to employ any of these strategies and there is no
            assurance that any derivatives strategy used by a Fund will
            succeed.

              A description of the various derivative instruments in which the
            Underlying Funds may invest and the risks associated with each
            instrument is included in the Underlying Fund prospectuses and in
            the Statement of Additional Information. The following provides a
            more general discussion of important risk factors relating to all
            derivative instruments that may be used by the Underlying Funds.

              Management Risk Derivative products are highly specialized
            instruments 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 instrument 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.


15PIMCO Funds: Multi-Manager Series
<PAGE>

              Liquidity Risk Liquidity risk exists when a particular
            derivative instrument is difficult to purchase or sell. If a
            derivative transaction is particularly large or if the relevant
            market is illiquid (as is the case with many privately negotiated
            derivatives), it may not be possible to initiate a transaction or
            liquidate a position at an advantageous time or price.

              Leveraging Risk Because many derivatives have a leverage
            component, adverse changes in the value or level of the underlying
            asset, 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. To limit leveraging risk, the Underlying Funds
            observe asset segregation requirements to cover their obligations
            under derivative instruments.

              Lack of Availability Because the markets for certain derivative
            instruments (including markets located in foreign countries) are
            relatively new and still developing, suitable derivatives
            transactions may not be available in all circumstances for risk
            management or other purposes. There is no assurance that an
            Underlying Fund will engage in derivatives transactions at any
            time or from time to time. A Fund's ability to use derivatives may
            also be limited by certain regulatory considerations.

              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 an
            Underlying Fund's interest. If a portfolio manager incorrectly
            forecasts the values of securities, currencies or interest rates
            or other economic factors in using derivatives for an Underlying
            Fund, the Fund might have been in a better position if it had not
            entered into the transaction at all. 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 other investments of an
            Underlying Fund. An Underlying Fund may also have to buy or sell a
            security at a disadvantageous time or price because the Fund is
            legally required to maintain offsetting positions or asset
            coverage in connection with certain derivatives transactions.

              Other risks in using derivatives include the risk of mispricing
            or improper valuation of derivatives and the inability of
            derivatives to correlate perfectly with underlying assets, rates
            and indexes. Many derivatives, in particular privately negotiated
            derivatives, are complex and often valued subjectively. Improper
            valuations can result in increased cash payment requirements 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 indexes they are
            designed to closely track. In addition, an Underlying Fund's use
            of derivatives may also cause the Fund to realize higher amounts
            of short-term capital gains (taxed at ordinary income tax rates
            when distributed to shareholders who are individuals) than if the
            Fund had not used such instruments.

Foreign     Many Underlying Funds (in particular, PIMCO International,
Investment  International Growth, Structured Emerging Markets, Tax-Efficient
Risk        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 denominated in foreign
            currencies (together, "foreign securities"). These Funds may
            experience more rapid and extreme changes in value than Funds that
            invest exclusively in securities of U.S. issuers or securities
            that trade exclusively in U.S. markets.

              The securities markets of many foreign countries are relatively
            small, with a limited number of companies representing a small
            number of industries. Foreign securities often trade with less
            frequency and volume than domestic securities and therefore may
            exhibit greater price volatility. Additionally, issuers of foreign
            securities are usually not subject to the same degree of
            regulation as U.S. issuers. Reporting, accounting and auditing
            standards of foreign countries differ, in some cases
            significantly, from U.S. standards. Also, nationalization,
            expropriation or confiscatory taxation, currency blockage,
            political changes or diplomatic developments could adversely
            affect an Underlying Fund's investments in a foreign country. In
            the event of nationalization, expropriation or other confiscation,
            a Fund could lose its entire investment in foreign securities. To
            the extent that an Underlying Fund invests a significant portion
            of its assets in a narrowly defined geographic area such as
            Eastern Europe, South Africa or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments. Adverse conditions in certain regions (such as
            Southeast Asia) can also adversely affect securities of other
            countries whose economies appear to be unrelated. In addition,
            special U.S. tax considerations may apply to an Underlying Fund's
            investment in foreign securities.


                                                                   Prospectus 16
<PAGE>

              Certain Underlying Bond Funds may invest in sovereign debt
            issued by governments, their agencies or instrumentalities, or
            other government-related entities. Holders of sovereign debt may
            be requested to participate in the rescheduling of such debt and
            to extend further loans to governmental entities. In addition,
            there is no bankruptcy proceeding by which defaulted sovereign
            debt may be collected.

Emerging    Certain Underlying Funds (in particular, PIMCO Structured Emerging
Markets     Markets, Tax-Efficient Structured Emerging Markets and Emerging
Risk        Markets Bond Funds) may invest in the securities of issuers based
            in countries with developing or "emerging market" economies. These
            securities may present market, credit, currency, liquidity, legal,
            political and other risks different from, or greater than, the
            risks of investing in developed foreign countries.

Currency    Many Underlying Funds may invest directly in foreign currencies or
Risk        in securities that trade in, or receive revenues in, foreign
            currencies. To the extent that they do so, these Funds are subject
            to the risk that those currencies will decline in value relative
            to the U.S. dollar, or, in the case of hedging positions, that the
            U.S. Dollar will decline in value relative to the currency being
            hedged. PIMCO Global Bond, Foreign Bond, Emerging Markets Bond,
            International, International Growth, Structured Emerging Markets
            and Tax-Efficient Structured Emerging Markets Funds are
            particularly sensitive to currency risk. Currency rates in foreign
            countries may fluctuate significantly over short periods of time
            for a number of reasons, including changes in interest rates,
            intervention (or the failure to intervene) by U.S. or foreign
            governments, central banks or supranational entities such as the
            International Monetary Fund, or by the imposition of currency
            controls or other political developments in the U.S. or abroad.
            For example, significant uncertainty surrounds the 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
            Underlying Fund assets are denominated may be devalued against the
            U.S. dollar, resulting in a loss to such Funds.

Focused     Focusing Fund investments in a small number of issuers, industries
Investment  or foreign currencies increases risk. PIMCO Global Bond, Foreign
Risk        Bond and Emerging Markets Bond Funds are "non-diversified," which
            means that they invest in a smaller number of issuers than
            diversified mutual funds. Other Underlying Funds also normally
            invest in a relatively small number of issuers. In addition, many
            Underlying Bond Funds may invest a substantial portion of their
            assets in the bonds of similar projects or from issuers in the
            same state. To the extent that they focus their investments, the
            Underlying Funds may have more risk because changes in the value
            of a single security or the impact of a single economic, political
            or regulatory occurrence may have a greater adverse impact on the
            Underlying Fund's net asset value. Some of those investments also
            may present substantial credit or other risks. PIMCO
            International, International Growth, Structured Emerging Markets,
            Tax-Efficient Structured Emerging Markets, Global Bond, Foreign
            Bond and Emerging Markets Bond Funds may be subject to increased
            risk to the extent they focus their assets in securities
            denominated in a particular foreign currency or in a narrowly
            defined geographic area outside the U.S. Similarly, PIMCO
            Innovation Fund is vulnerable to events affecting companies which
            use innovative technologies to gain a strategic, competitive
            advantage in their industry and companies that provide and service
            those technologies because it normally concentrates its
            investments in those companies. Also, the Underlying Funds may
            from time to time have greater risk because they invest a
            substantial portion of their assets in related industries such as
            "technology" or "financial and business services."

             Although each Portfolio normally invests in a number of different
            Underlying Funds, to the extent that a Portfolio concentrates a
            significant portion of its assets in a single Underlying Fund, it
            will be particularly sensitive to the risks associated with that
            Fund and any investments in which that Fund concentrates.

Leveraging  Certain Underlying Funds may engage in transactions or purchase
Risk        instruments that give rise to forms of leverage. Such transactions
            and instruments may include, among others, the use of reverse
            repurchase agreements and other borrowings, the investment of
            collateral from loans of portfolio securities, or the use of when-
            issued, delayed-delivery or forward commitment transactions. An
            Underlying Fund's use of derivatives may also involve leverage.
            Leverage, including borrowing, will cause the value of an
            Underlying  Fund's shares to be more volatile that if the Fund did
            not use leverage. This is because leverage tends to exaggerate the
            effect of any increase or decrease in the value of a Fund's
            portfolio securities. The use of leverage may also cause an
            Underlying Fund to liquidate portfolio positions when it may not
            be advantageous to do so in order to satisfy its obligations or to
            meet segregation requirements.


17 PIMCO Funds: Multi-Manager Series
<PAGE>

Interest    All of the Underlying Funds that invest in fixed income
Rate Risk   securities, and particularly the Underlying Bond Funds, are
            subject to interest rate risk. Changes in the market values of
            fixed income securities are largely a function of changes in the
            current level of interest rates. The value of an Underlying Fund's
            investments in fixed income securities will typically change as
            the level of interest rates fluctuate. During periods of declining
            interest rates, the value of fixed income securities generally
            rise. Conversely, during periods of rising interest rates, the
            value of fixed income securities generally decline.

             "Duration" is one measure of the expected life of a fixed income
            security that is used to determine the sensitivity of a security's
            price to changes in interest rates. Securities with longer
            durations tend to be more sensitive to changes in interest rates,
            usually making them more volatile than securities with shorter
            durations. Accordingly, Underlying Bond Funds with longer average
            portfolio durations (e.g., PIMCO Long-Term U.S. Government Fund)
            will be more sensitive to changes in interest rates than Funds
            with shorter average portfolio 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 durations
            precisely when that is least advantageous (i.e., when interest
            rates are rising).

             Many Underlying Funds, including most of the Underlying Bond
            Funds, may invest in securities that are particularly sensitive to
            fluctuations in prevailing interest rates and have relatively high
            levels of interest rate risk. These include various mortgage-
            related securities (for instance, the interest-only or "IO" class
            of a stripped mortgage-backed security) and "zero 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).

Credit      All of the Underlying Funds are subject to credit risk. This is
Risk        the risk that the issuer or the guarantor of a fixed income
            security, or the counterparty to a derivatives contract,
            repurchase agreement or a loan of portfolio securities, will be
            unable or unwilling to make timely principal and/or interest
            payments, or to otherwise honor its obligations. Securities are
            subject to varying degrees of credit risk, which are often
            reflecting in credit ratings provided by rating agencies such as
            Moody's Investors Service, Inc. ("Moody's") and Standard & Poor's
            Ratings Services ("S&P").

             The Underlying Funds that invest in fixed income securities
            (particularly the Underlying Bond Funds) 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 governments. Even certain U.S. Government
            securities are subject to credit risk.

High        High yield securities (commonly known as "junk bonds") are fixed
Yield       income securities rated lower than Baa by Moody's or BBB by S&P,
Risk        or unrated securities determined to be of comparable quality.
            Underlying Bond Funds which invest in high yield securities (in
            particular, PIMCO High Yield and Emerging Markets Bond Funds) may
            be subject to greater volatility and higher levels of credit,
            liquidity and other risks than Funds that invest exclusively in
            higher quality fixed income securities (e.g., PIMCO Money Market
            and Long-Term U.S. Government Funds). High yield securities are
            considered predominately speculative with respect to the issuer's
            continuing ability to make principal and interest payments (credit
            risk). High yield securities may also be more susceptible to real
            or perceived adverse economic and competitive industry conditions
            than higher quality fixed income securities. An economic downturn
            or period of rising interest rates could adversely affect the
            market for high yield securities and reduce an Underlying Bond
            Fund's ability to sell its high yield securities (liquidity risk).

Mortgage    Most of the Underlying Bond Funds may invest in mortgage-related
Risk        securities. Rising interest rates tend to extend the duration of
            mortgage-related securities, making them more sensitive to changes
            in interest rates. As a result, in a period of rising interest
            rates, an Underlying Fund that holds mortgage-related securities
            may exhibit additional volatility. This is sometimes referred to
            as extension risk. In addition, mortgage-related securities may
            involve special risks relating to unanticipated rates of
            prepayment on the mortgages underlying the securities. This is
            sometimes referred to as prepayment risk. Declining interest rates
            may tend to increase prepayments, and these prepayments would have
            to be reinvested at the then-prevailing lower interest rates.
            Therefore, an Underlying Fund that holds mortgage-related
            securities may have less potential for capital appreciation during
            periods of declining interest rates than Funds that invest in
            other types of fixed income securities of similar maturities.

                                                                   Prospectus 18
<PAGE>

Management  Each Underlying Fund is subject to management risk because it is
Risk        an actively managed investment portfolio. PIMCO Advisors, Pacific
            Investment Management Company, and the sub-advisers and individual
            portfolio managers of the Underlying Funds will apply investment
            techniques and risk analyses in making investment decisions for
            the Funds, but there can be no guarantee that they will produce
            the desired results.

A Note on   Each Portfolio may invest in PIMCO StocksPLUS Fund. While the
PIMCO       investment objective of that Fund is to achieve a total return
StocksPLUS  which exceeds the total return performance of the S&P 500 Index,
Fund        it does so by investing substantially all of its assets in a
            combination of equity-based (S&P 500 Index) derivative
            instruments, backed by a portfolio of fixed income securities.
            Consequently, the risks of investing in the Fund include
            derivatives risk and the risks generally associated with the
            Underlying Bond Funds. To the extent that the Fund invests in S&P
            500 Index derivatives backed by a portfolio of fixed income
            securities, under certain conditions, generally in a market where
            the value of both S&P 500 Index derivatives and fixed income
            securities are declining, the Fund may experience greater losses
            than would be the case if it were to invest directly in a
            portfolio of S&P 500 Index stocks.

19 PIMCO Funds: Multi-Manager Series
<PAGE>

            Investment Objectives and Principal Investment Strategies

            The investment objective and principal investment strategies 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
            managers. 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.

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
            Portfolio's assets will be allocated among Underlying Stock Funds
            and 40% among Underlying Bond Funds.

            30/70 Portfolio seeks current income. Long-term capital
            appreciation is a secondary objective. Under normal conditions,
            approximately 30% of the Portfolio's assets will be allocated
            among Underlying Stock Funds and 70% among Underlying Bond Funds.

             PIMCO Advisors serves as the investment adviser to the
            Portfolios. PIMCO Advisors' Asset Allocation Committee determines
            how each Portfolio allocates and reallocates its assets among the
            Underlying Funds according to the Portfolio's equity/fixed income
            allocation targets and ranges. Please see "Asset Allocation
            Strategies" in the Summary Information section above for a
            description of the allocation strategies and techniques used by
            the Committee. The table below illustrates the equity and fixed
            income allocation targets and typical ranges for each Portfolio
            under normal market conditions.

             Equity and Fixed Income Targets and Ranges
             (as a percentage of each Portfolio's total investments)

<TABLE>
<CAPTION>
                                                             Typical
           PIMCO Funds                            Target     Allocation
           Asset Allocation Series                Allocation Range
               --------------------------------------------------------
           <S>                                    <C>        <C>
           90/10 Portfolio
            Equity--Underlying Stock Funds        90%        80% - 100%
            Fixed Income--Underlying Bond Funds*  10%         0% -  20%
               --------------------------------------------------------
           60/40 Portfolio
            Equity--Underlying Stock Funds        60%        50% -  70%
            Fixed Income--Underlying Bond Funds*  40%        30% -  50%
               --------------------------------------------------------
           30/70 Portfolio
            Equity--Underlying Stock Funds        30%        25% -  35%
            Fixed Income--Underlying Bond Funds*  70%        65% -  75%
</TABLE>

              * The Fixed Income portion may include a money market component
              through investments in PIMCO Money Market Fund.


                                                                   Prospectus 20
<PAGE>

              Each Portfolio invests all of its assets in Underlying Funds and
            may invest in any or all of the Funds. However, it is expected
            that a Portfolio will invest in only some of the Underlying Funds
            at any particular time. A Portfolio's investment in a particular
            Underlying Fund may exceed 25% of the Portfolio's 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. The particular 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 is also subject to certain investment restrictions
            that are described under "Investment Restrictions" in the
            Statement of Additional Information.

Equity      The equity portion of each Portfolio will be allocated among a
Portion     number of Underlying Stock Funds which represent a broad range of
of the      equity-based asset classes and sub-classes and a variety of
Portfolios  investment objectives and strategies. By allocating assets among
            these Funds, the equity portions of the Portfolios can be
            diversified in multiple ways, including the following:

            By Investment Style/Category
              .Growth
              .Blend (Broad Market)
              .Value
              .Enhanced Index
              .Sector-Related

            By Region
              .U.S. Equities
              .International Developed Markets Equities
              .International Emerging Markets Equities

            By Size
              .Large-Cap
              .Mid-Cap
              .Small-Cap

            For a description of the Underlying Stock Funds and their
            investment objectives and strategies, please see "Underlying
            Funds."


Fixed       The fixed income portion of each Portfolio will be allocated among
Income      a number of Underlying Bond Funds which represent a broad range of
Portion     fixed income-based asset classes and sub-classes and a variety of
of the      investment objectives and strategies. By allocating assets among
Portfolios  these Funds, the fixed income portions of the Portfolios can be
            diversified in multiple ways, including the following:

            By Sector/Investment Specialty
              .Governments
              .Mortgages
              .Corporate
              .Inflation-Indexed

            By Region
              .U.S. Fixed Income
              .Developed Foreign Fixed Income
              .Emerging Markets Fixed Income

            By Credit Quality
              .Investment Grade/Money Market
              .Medium Grade
              .High Yield

            By Duration
              .Long-Term
              .Intermediate-Term
              .Short-Term

21 PIMCO Funds: Multi-Manager Series
<PAGE>

            For a description of the Underlying Bond Funds and their
            investment objectives and strategies, please see "Underlying
            Funds."

Temporary   In response to unfavorable market and other conditions, each
Defensive   Portfolio may invest up to 100% of its assets in PIMCO Money
Strategies  Market Fund (and may deviate from its asset allocation range) for
            temporary defensive purposes. A Portfolio may also borrow money
            for temporary or emergency purposes. These temporary strategies
            would be inconsistent with the Portfolio's investment objective
            and principal investment strategies and may adversely affect the
            Portfolio's ability to achieve its investment objective.


Portfolio   A change in the securities held by a Portfolio is known as
Turnover    "portfolio turnover." Because PIMCO Advisors does not expect to
            reallocate the Portfolios' assets among the Underlying Funds on a
            frequent 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
            expenses 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
            correspondingly 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. Shareholders in the Portfolios may also bear expenses
            directly or indirectly through sales of securities held by the
            Portfolios and the Underlying Funds which result in realization of
            taxable capital gains. To the extent such gains relate to
            securities held for twelve months or less, such gains will be
            short-term capital gains taxed at ordinary income tax rates when
            distributed to shareholders who are individuals. The trading costs
            and tax effects associated with portfolio turnover may adversely
            affect a Portfolio's performance and the return to shareholders.


Changes     The investment objective, equity/fixed income allocation targets
in          and ranges, and, unless otherwise noted, other investment policies
Investment  of each Portfolio described in this Prospectus may be changed by
Objectives  the Board of Trustees without shareholder approval. If there is a
and         change in a Portfolio's investment objective, allocation target or
Policies    range, or other investment policies, shareholders should consider
            whether the Portfolio remains an appropriate investment in light
            of their then current financial positions and needs.

                                                                   Prospectus 22
<PAGE>

             Underlying Funds

             Each Portfolio invests all of its assets in Underlying Funds.
             Accordingly, each Portfolio's investment performance depends upon
             a favorable allocation among the Underlying Funds as well as the
             ability of the Underlying Funds to achieve their objectives. There
             can be no assurance that the investment objective of any
             Underlying Fund will be achieved. Shares of the Underlying Funds
             are not offered in this Prospectus.

Advisory     PIMCO Advisors serves as investment adviser for each of the
Arrangements Underlying Stock Funds, except that its affiliate, Pacific
for the      Investment Management Company, is the sole investment adviser to
Underlying   PIMCO StocksPLUS Fund. The PIMCO Equity Advisors division of PIMCO
Funds        Advisors manages the investments of several of the Underlying
             Stock Funds. PIMCO Advisors retains sub-advisory firms to manage
             the portfolios of other Underlying Stock Funds. These firms
             include Cadence Capital Management, NFJ Investment Group and
             Parametric Portfolio Associates, each of which is an affiliate of
             PIMCO Advisors, and Blairlogie Capital Management, which is not an
             affiliate. Pacific Investment Management Company is the sole
             investment adviser to each of the Underlying Bond Funds. For a
             complete description of the advisory and sub-advisory arrangements
             for the Underlying Funds, please see the Statement of Additional
             Information and 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.

Underlying   The following provides a concise description of the investment
Stock        objective, main investments and other information about each
Funds        Underlying Stock Fund. 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>
                                                                                     Approximate Approximate
               PIMCO                Investment            Main                       Number of   Capitalization
               Fund                 Objective             Investments                Holdings    Range
 ----------------------------------------------------------------------------------------------------------------------
  <C>          <C>                  <C>                   <S>                        <C>         <C>
  Growth Stock Growth               Long-term growth of   Common stocks of           35-40       At least $5 billion
  Funds                             capital;              companies with market
                                    income is an          capitalizations of at
                                    incidental            least $5 billion
                                    consideration
               --------------------------------------------------------------------------------------------------------
               Target               Capital appreciation; Common stocks of           40-60       Between $1 billion
                                    no consideration      companies with market                  and $10 billion
                                    is given to           capitalizations of
                                    income                between $1 billion and
                                                          $10 billion
               --------------------------------------------------------------------------------------------------------
               Opportunity          Capital appreciation; Common stocks of           60-100      Between $100 million
                                    no consideration      companies with market                  and $2 billion
                                    is given to           capitalizations of
                                    income                between $100 million and
                                                          $2 billion
 ----------------------------------------------------------------------------------------------------------------------
  Blend Stock  Capital Appreciation Growth of capital     Common stocks of           60-100      At least $1 billion
  Funds                                                   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 of capital     Common stocks of           60-100      More than $500 million
                                                          companies with market                  (excluding the
                                                          capitalizations of more                largest 200
                                                          than $500 million                      companies)
                                                          (excluding the largest
                                                          200 companies) that have
                                                          improving fundamentals
                                                          and whose stock is
                                                          reasonably valued by the
                                                          market
               --------------------------------------------------------------------------------------------------------
               Small-Cap            Growth of capital     Common stocks of           60-100      More than $100 million
                                                          companies with market                  (excluding the largest
                                                          capitalizations of more                1,000 companies)
                                                          than $100 million
                                                          (excluding the largest
                                                          1,000 companies) that
                                                          have improving
                                                          fundamentals and whose
                                                          stock is reasonably
                                                          valued by the market
               --------------------------------------------------------------------------------------------------------
               Micro-Cap            Long-term growth of   Common stocks of           60-100      Less than
                                    capital               companies with market                  $250 million
                                                          capitalizations of less
                                                          than $250 million that
                                                          have improving
                                                          fundamentals and whose
                                                          stock is reasonably
                                                          valued by the market
</TABLE>

23 PIMCO Funds: Multi-Manager Series
<PAGE>

<TABLE>
<CAPTION>
                                                                                          Approximate Approximate
                 PIMCO                    Investment            Main                      Number of   Capitalization
                 Fund                     Objective             Investments               Holdings    Range
 ---------------------------------------------------------------------------------------------------------------------------
  <C>            <C>                      <C>                   <S>                       <C>         <C>
  Value Stock    Equity Income            Current income as a   Income-producing common   40-50       More than $2 billion
  Funds                                   primary objective;    stocks of companies
                                          long-term growth of   with market
                                          capital as a          capitalizations of more
                                          secondary objective   than $2 billion
                 -----------------------------------------------------------------------------------------------------------
                 Renaissance              Long-term growth of   Common stocks of          50-80       All capitalizations
                                          capital               companies with below-
                                          and income            average valuations
                                                                whose business
                                                                fundamentals are
                                                                expected to improve
                 -----------------------------------------------------------------------------------------------------------
                 Value                    Long-term growth of   Common stocks of          40          More than $2 billion
                                          capital               companies with market
                                          and income            capitalizations of more
                                                                than $2 billion that
                                                                are undervalued
                                                                relative to the market
                                                                and their industry
                                                                groups
                 -----------------------------------------------------------------------------------------------------------
                 Small-Cap Value          Long-term growth of   Common stocks of          100         Between $100 million
                                          capital               companies with market                 and $1.5 billion
                                          and income            capitalizations of
                                                                between $100 million
                                                                and $1.5 billion and
                                                                below-average price-to-
                                                                earnings ratios
                                                                relative to the market
                                                                and their industry
                                                                groups
 ---------------------------------------------------------------------------------------------------------------------------
  Enhanced Index Tax-Efficient Equity     Maximum after-tax     A broadly diversified     More than   More than $5 billion
  Stock Funds                             growth of capital     portfolio of at least     200
                                                                200 common stocks of
                                                                companies represented
                                                                in the S&P 500 Index
                                                                with market
                                                                capitalizations of more
                                                                than $5 billion
                 -----------------------------------------------------------------------------------------------------------
                 Enhanced Equity          A total return which  Common stocks             100-200     At least $5 billion
                                          equals or exceeds the represented in the S&P
                                          total return          500 Index with market
                                          performance of an     capitalizations of more
                                          index (currently the  than $5 billion
                                          S&P 500 Index) that
                                          represents the
                                          performance of a
                                          reasonably broad
                                          spectrum of common
                                          stocks that are
                                          publicly traded in
                                          the U.S.
                 -----------------------------------------------------------------------------------------------------------
                 StocksPLUS               Total return that     S&P 500 stock index       N/A         N/A
                                          exceeds that          derivatives backed by a
                                          of the S&P 500 Index  portfolio of short-term
                                                                fixed income securities
 ---------------------------------------------------------------------------------------------------------------------------
  International  International            Capital appreciation  Common stocks of          200-250     More than $500 million
  Stock Funds                             through investment in foreign (non-U.S.)
                                          an international      issuers (developed and
                                          portfolio; income is  emerging markets)
                                          an incidental         with market
                                          consideration         capitalizations of more
                                                                than $500 million
                 -----------------------------------------------------------------------------------------------------------
                 International Growth     Long-term capital     An international          50-100      At least $2 billion
                                          appreciation          portfolio of
                                                                common stocks
                 -----------------------------------------------------------------------------------------------------------
                 Structured Emerging      Long-term growth of   Common stocks of          More than   All
                 Markets                  capital               companies located in,     300         capitalizations
                                                                or whose business
                                                                relates to, emerging
                                                                markets
                 -----------------------------------------------------------------------------------------------------------
                 Tax-Efficient Structured Long-term growth of   Common stocks of          More than   All
                 Emerging Markets         capital. The Fund     companies located in,     300         capitalizations
                                          also seeks to achieve or whose business
                                          superior after-tax    relates to, emerging
                                          returns for its       markets
                                          shareholders by using
                                          a variety of tax-
                                          efficient management
                                          strategies
 ---------------------------------------------------------------------------------------------------------------------------
  Sector-Related Innovation Innovation    Capital appreciation; Common stocks of          40          More than $200 million
  Stock Funds                             no                    technology-related
                                          consideration is      companies with market
                                          given to income       capitalizations of more
                                                                than $200 million
</TABLE>


                                                                   Prospectus 24
<PAGE>


Underlying  The investment objective of each Underlying Bond Fund (except as
Bond        provided below) is to seek to realize maximum total return,
Funds       consistent with preservation of capital and prudent investment
            management. The "total return" sought by most of the Underlying
            Bond Funds will consist of income earned on the Fund's
            investments, plus capital appreciation, if any, which generally
            arises from decreases in interest rates or improving credit
            fundamentals for a particular sector or security. The investment
            objective of PIMCO Real Return Bond Fund is to seek to realize
            maximum real return, consistent with preservation of real capital
            and prudent investment management. "Real return" is a measure of
            the change in purchasing power of money invested in a particular
            investment after adjusting 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 main
            investments 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>
                                                                                                               Non-U.S. Dollar
                                                                                                               Denominated
                         PIMCO Fund        Main Investments           Duration         Credit Quality(/1/)     Securities(/2/)
             --------------------------------------------------------------------------------------------------------
          <C>            <C>               <S>                        <C>              <C>                     <C>
          Short          Money Market      Money market instruments   less than or     Min 95% Aaa or Prime 1; 0%
          Duration Bond                                               equal to 90 days less than or equal to
          Funds                                                       dollar-weighted  5% Aa or Prime 2
                                                                      average maturity
                      ------------------------------------------------------------------------------------------
                         Short-Term        Money market instruments   0-1 yr           B to Aaa; max 10%       0-5%
                                           and short maturity                          below Baa
                                           fixed income
                                           securities
                      ------------------------------------------------------------------------------------------
                         Low Duration      Short maturity fixed       1-3 yrs          B to Aaa; max 10%       0-20%
                                           income securities                           below Baa

             --------------------------------------------------------------------------------------------------------
          Intermediate   Moderate Duration Short and intermediate     2-5 yrs          B to Aaa; max 10%       0-20%
          Duration                         maturity fixed income                       below Baa
          Bond Funds                       securities
                      ------------------------------------------------------------------------------------------
                         Total Return      Intermediate maturity      3-6 yrs          B to Aaa; max 10%       0-20%
                                           fixed income securities                     below Baa
                      ------------------------------------------------------------------------------------------
                         Total Return II   Intermediate maturity      3-6 yrs          Baa to Aaa              0%
                                           fixed income securities
                                           with quality
                                           and foreign issuer
                                           restrictions
             --------------------------------------------------------------------------------------------------------
          Long Duration  Long-Term U.S.    Long-term maturity fixed   greater than or  A to Aaa                0%
          Bond Funds     Government        income securities          equal to 8
                                                                      years
             --------------------------------------------------------------------------------------------------------
          International  Global Bond       U.S. and foreign           3-7 yrs          B to Aaa; max 10%       25-75%
          Bond Funds                       intermediate                                below Baa
                                           maturity fixed income
                                           securities
                      ------------------------------------------------------------------------------------------
                         Foreign Bond      Intermediate maturity      3-7 yrs          B to Aaa; max 10%       greater than or
                                           hedged foreign fixed                        below Baa               equal to 85%
                                           income securities
                      ------------------------------------------------------------------------------------------
                         Emerging Markets  Emerging market fixed      0-8 yrs          B to Aaa                greater than or
                         Bond              income securities                                                   equal to 80%
             --------------------------------------------------------------------------------------------------------
          High Yield     High Yield        Higher yielding fixed      2-6 yrs          B to Aaa; min 65%       0%
          Bond Funds                       income securities                           below Baa
             --------------------------------------------------------------------------------------------------------
          Inflation      Real Return Bond  Inflation-indexed fixed    N/A              B to Aaa; max 10%       0-35%
          Indexed Bond                     income securities                           below Baa
          Funds

</TABLE>
            1. As rated by Moody's Investors Service, Inc., or equivalently
             rated by Standard & Poor's Rating Services, or if unrated, deter-
             mined by Pacific Investment Management Company to be of compara-
             ble quality.

            2. Percentage limitations relate to non-U.S. dollar-denominated
             securities for all Underlying Bond Funds except PIMCO Global
             Bond, Foreign Bond and Emerging Markets Bond Funds. Percentage
             limitations for these three Funds relate to securities of non-
             U.S. issuers, denominated in any currency. Each Underlying Bond
             Fund (except PIMCO Total Return II and Long-Term U.S. Government
             Funds) may invest beyond these limits in U.S. dollar-denominated
             securities of non-U.S. issuers.

              Each Underlying Bond Fund invests 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 issued or
            guaranteed by the U.S. Government, its agencies or
            instrumentalities ("U.S. Government securities"); corporate debt
            securities, including convertible securities and corporate
            commercial paper; mortgage-backed 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

25 PIMCO Funds: Multi-Manager Series
<PAGE>

            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 other
            instrumentalities; obligations of foreign governments or their
            subdivisions, agencies and instrumentalities; and obligations of
            international agencies or supranational entities.

Other       In addition to purchasing the securities listed above under "Main
Investment  Investments," some or all of the Underlying Funds may to varying
Practices   extents: lend portfolio securities; enter into repurchase
of the      agreements and reverse repurchase agreements; purchase and sell
Underlying  securities on a when-issued or delayed delivery basis; enter into
Funds       forward 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
            agreements; invest in foreign securities; and buy or sell foreign
            currencies 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 "Investment Objectives and Policies" in the
            Statement of Additional Information and 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.

Additional  In addition to the Funds listed above, a Portfolio may invest in
Underlying  additional Underlying Funds, including those that may become
Funds       available for investment in the future, at the discretion of PIMCO
            Advisors and without shareholder approval.

            Other Risk Information

Potential   PIMCO Advisors has broad discretion to allocate and reallocate the
Conflicts   Portfolios' assets among the Underlying Funds consistent with the
of          Portfolios' investment objectives and policies and asset
Interest    allocation targets and ranges. Although PIMCO Advisors does not
            charge an investment advisory fee for its asset allocation
            services, PIMCO Advisors and its affiliates indirectly receive
            fees (including investment advisory and administrative fees) from
            the Underlying Funds in which the Portfolios invest. 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 Advisors 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 fulfilling
            their fiduciary duties to both the Portfolios and the Underlying
            Funds of the Trust.

                                                                   Prospectus 26
<PAGE>

              Management of the Portfolios

Investment    PIMCO Advisors serves as the investment adviser and the
Adviser       administrator (serving in its capacity as administrator, the
and           "Administrator") for the Portfolios. Subject to the supervision of
Administrator the Board of Trustees, PIMCO Advisors is responsible for managing,
              either directly or through others selected by it, the investment
              activities of the Portfolios and the Portfolios' business affairs
              and other administrative matters.

                PIMCO Advisors is located at 800 Newport Center Drive, Newport
              Beach, California 92660. Organized in 1987, PIMCO Advisors
              provides investment management and advisory services to private
              accounts of institutional and individual clients and to mutual
              funds. As of December 31, 1999, PIMCO Advisors and its subsidiary
              partnerships had more than $261 billion in assets under
              management.

                PIMCO Advisors has retained its affiliate, Pacific Investment
              Management Company, to provide various administrative and other
              services required by the Portfolios in its capacity as sub-
              administrator. PIMCO Advisors and the sub-administrator may retain
              other affiliates to provide certain of these services.

Asset         PIMCO Advisors' Asset Allocation Committee is responsible for
Allocation    determining how the Portfolios' assets are allocated and
Committee     reallocated from time to time among the Underlying Funds. The
              following provides information about the individuals who comprise
              the Asset Allocation Committee and are primarily responsible for
              making asset allocation and other investment decisions for the
              Portfolios.

<TABLE>
<CAPTION>
          Asset Allocation
          Committee Member     Since* Recent Professional Experience
          ---------------------------------------------------------------------------------------------
          <S>                  <C>    <C>
          William D. Cvengros  1998   Chief Executive Officer, President and a Member of the Management
                                      Board of PIMCO Advisors. Previously, he was Chairman of the Board
                                      of Trustees and President of the Trust. He was a Director and the
                                      Vice Chairman and Chief Investment Officer of Pacific Life
                                      Insurance Company from January 1990 to November 1994.
          Timothy R. Clark     1998   Vice President of PIMCO Advisors and a Senior Vice President of
                                      PIMCO Funds Distributors LLC. Previously, he was President of
                                      Katonah Capital Management, Inc. from July 1995 to December 1996
                                      and served in various capacities at Zweig Advisors Inc. from
                                      September 1989 to July 1995.
          Robert S. Venable    1998   Vice President of PIMCO Advisors. Previously, he was a Vice
                                      President and portfolio manager at Pacific Investment Management
                                      Company from August 1992 to August 1996.
          David Young          1998   Vice President and an Account Manager at Pacific Investment
                                      Management Company. He has served in various capacities with
                                      Pacific Investment Management Company and its affiliates since
                                      January 1994. Previously, he was a Vice President and portfolio
                                      manager at Analytic Investment Management, Inc. from September 1988
                                      to January 1994.
</TABLE>
             * Each individual has served on the Committee since the inception
              of each Portfolio in September 1998.

              It is expected that, on or about May 8, 2000, Messrs. Cvengros
            and Venable will be replaced as members of the Asset Allocation
            Committee by Kenneth W. Corba and John S. Loftus. Mr. Corba is a
            Managing Director and Chief Investment Officer of the PIMCO Equity
            Advisors division of PIMCO Advisors, and a member of the
            Management Board of PIMCO Advisors. Prior to joining PIMCO
            Advisors, he was with Eagle Asset Management from 1995 to 1998,
            serving in various capacities including as Chief Investment
            Officer and Portfolio Manager. He was with Stein Roe & Farnham
            Inc. from 1984 to 1995. Mr. Loftus is a Managing Director of
            Pacific Investment Management Company, where he is a senior member
            of its investment strategy group. Mr. Loftus also heads the firm's
            product management area. Mr. Loftus joined Pacific Investment
            Management Company in 1986.

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 their proportionate share
            of the advisory fees paid to PIMCO Advisors and Pacific Investment
            Management Company by the Underlying Funds in which the Portfolios
            invest. See "Underlying Fund Expenses" below.

Administrative
Fees
            Each Portfolio pays for the administrative services it requires
            under a fee structure which is essentially fixed. Class A, Class B
            and Class C shareholders of each Portfolio pay an administrative
            fee to PIMCO Advisors, computed as a percentage of the Portfolio's
            assets attributable in the aggregate to those classes of shares.
            PIMCO Advisors, in turn, provides or procures administrative
            services for Class A, Class B and Class C shareholders and also
            bears the costs of various third-party services required by the
            Portfolios, including audit, custodial, portfolio accounting,
            legal, transfer agency and printing costs.

              The Portfolios were not operational for the entire fiscal year
            ended June 30, 1999. Each Portfolio pays monthly administrative
            fees to PIMCO Advisors at an 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 $2.5
            billion, and 0.35% based on such average daily net assets in
            excess of $2.5 billion. The Portfolios also indirectly pay their
            proportionate share of the administrative fees charged by PIMCO
            Advisors and

27 PIMCO Funds: Multi-Manager Series
<PAGE>

            Pacific Investment Management Company to the Underlying Funds in
            which the Portfolios invest. See "Underlying Fund Expenses" below.

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 Portfolios are structured in the following ways to lessen
            the impact of expenses incurred at the Underlying Fund level:

            . The Portfolios do not pay any fees for asset allocation or
              advisory services under the Trust's investment advisory
              agreement.

            . The Underlying Funds invest in Institutional Class shares of the
              Underlying Funds, which are not subject to any sales charges or
              12b-1 fees.

              The following table summarizes the annual expenses borne by
            Institutional Class shareholders of the Underlying Funds (based on
            estimates for the current fiscal year). Because the Portfolios
            invest in Institutional Class shares of the Underlying Funds,
            shareholders of each Portfolio indirectly 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
            "Fees and Expenses of the Portfolio" in each Portfolio Summary
            above.
<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 Growth               0.50%    0.25%         0.75%
               ----------------------------------------------------------------
           PIMCO Target               0.55     0.25          0.80
               ----------------------------------------------------------------
           PIMCO Opportunity          0.65     0.25          0.90
               ----------------------------------------------------------------
           PIMCO Capital
            Appreciation              0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Mid-Cap              0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Small-Cap            1.00     0.25          1.25
               ----------------------------------------------------------------
           PIMCO Micro-Cap            1.25     0.25          1.50
               ----------------------------------------------------------------
           PIMCO Equity Income        0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Renaissance          0.60     0.25          0.85
               ----------------------------------------------------------------
           PIMCO Value                0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Small-Cap Value      0.60     0.25          0.85
               ----------------------------------------------------------------
           PIMCO Tax-Efficient
            Equity                    0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO Enhanced Equity      0.45     0.25          0.70
               ----------------------------------------------------------------
           PIMCO StocksPLUS           0.40     0.25          0.65
               ----------------------------------------------------------------
           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 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 Total Return         0.25     0.18          0.43
               ----------------------------------------------------------------
           PIMCO Total Return II      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
               ----------------------------------------------------------------
           PIMCO High Yield           0.25     0.25          0.50
               ----------------------------------------------------------------
           PIMCO Real Return Bond     0.25     0.27          0.52
</TABLE>

                                                                   Prospectus 28
<PAGE>

Distributor The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors. The Distributor, located at
            2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.

            Investment Options -- Class A, B and C Shares

            The Trust offers investors Class A, Class B and Class C shares of
            each Portfolio in this Prospectus. Each class of shares is subject
            to different types and levels of sales charges than the other
            classes and bears a different level of expenses.

             The class of shares that is best for you depends upon a number of
            factors, including the amount and the intended length of your
            investment. The following summarizes key information about each
            class to help you make your investment decision, including the
            various expenses associated with each class. More extensive
            information about the Trust's multi-class arrangements is included
            in the PIMCO Funds Shareholders' Guide for Class A, B and C Shares
            (the "Guide"), which is included as part of the Statement of
            Additional Information and can be obtained free of charge from the
            Distributor. See "How to Buy and Sell Shares--PIMCO Funds
            Shareholders' Guide" below.

Class A     .   You pay an initial sales charge of up to 5.50% when you buy
Shares          Class A shares. The sales charge is deducted from your
                investment so that not all of your purchase payment is
                invested.

            .   You may be eligible for a reduction or a complete waiver of
                the initial sales charge under a number of circumstances. For
                example, you normally pay no sales charge if you purchase
                $1,000,000 or more of Class A shares. Please see the Guide for
                details.

            .   Class A shares are subject to lower 12b-1 fees than Class B or
                Class C shares. Therefore, Class A shareholders generally pay
                lower annual expenses and receive higher dividends than Class
                B or Class C shareholders.

            .   You normally pay no contingent deferred sales charge ("CDSC")
                when you redeem Class A shares, although you may pay a 1% CDSC
                if you purchase $1,000,000 or more of Class A shares (and
                therefore pay no initial sales charge) and then redeem the
                shares during the first 18 months after your initial purchase.
                The Class A CDSC is waived for certain categories of investors
                and does not apply if you are otherwise eligible to purchase
                Class A shares without a sales charge. Please see the Guide
                for details.

Class B     .   You do not pay an initial sales charge when you buy Class B
Shares          shares. The full amount of your purchase payment is invested
                initially.

            .  You normally pay a CDSC of up to 5% if you redeem Class B
               shares during the first six years after your initial purchase.
               The amount of the CDSC declines the longer you hold your Class
               B shares. You pay no CDSC if you redeem during the seventh year
               and thereafter. The Class B CDSC is waived for certain
               categories of investors. Please see the Guide for details.

            .  Class B shares are subject to higher 12b-1 fees than Class A
               shares for the first seven years they are held. During this
               time, Class B shareholders normally pay higher annual expenses
               and receive lower dividends than Class A shareholders.

            .  Class B shares automatically convert into Class A shares after
               they have been held for seven years. After the conversion takes
               place, the shares are subject to the lower 12b-1 fees paid by
               Class A shares.

Class C     .  You do not pay an initial sales charge when you buy Class C
Shares         shares. The full amount of your purchase payment is invested
               initially.

            .  You normally pay a CDSC of 1% if you redeem Class C shares
               during the first year after your initial purchase. The Class C
               CDSC is waived for certain categories of investors. Please see
               the Guide for details.

            .  Class C shares are subject to higher 12b-1 fees than Class A
               shares. Therefore, Class C shareholders normally pay higher
               annual expenses and receive lower dividends than Class A
               shareholders.

            .  Class C shares do not convert into any other class of shares.
               Because Class B shares convert into Class A shares after seven
               years, Class C shares will normally be subject to higher
               expenses and will pay lower dividends than Class B shares if
               the shares are held for more than seven years.

29 PIMCO Funds: Multi-Manager Series
<PAGE>

            The following provides additional information about the sales
            charges and other expenses associated with Class A, Class B and
            Class C shares.

- --------------------------------------------------------------------------------
Initial     Unless you are eligible for a waiver, the public offering price
Sales       you pay when you buy Class A shares of the Portfolios is the net
Charges--   asset value ("NAV") of the shares plus an initial sales charge.
Class A     The initial sales charge varies depending upon the size of your
Shares      purchase, as set forth below. No sales charge is imposed where
            Class A shares are issued to you pursuant to the automatic
            reinvestment of income dividends or capital gains distributions.

            90/10 Portfolio and 60/40 Portfolio
<TABLE>
         <S>                    <C>                          <C>
                                Initial Sales Charge         Initial Sales Charge
         Amount of              as % of Net                  as % of Public
         Purchase               Amount Invested              Offering Price
            ---------------------------------------------------------------------
         $0-$49,999             5.82%                        5.50%
            ---------------------------------------------------------------------
         $50,000-$99,999        4.71%                        4.50%
            ---------------------------------------------------------------------
         $100,000-$249,999      3.63%                        3.50%
            ---------------------------------------------------------------------
         $250,000-$499,999      2.56%                        2.50%
            ---------------------------------------------------------------------
         $500,000-$999,999      2.04%                        2.00%
            ---------------------------------------------------------------------
         $1,000,000 +           0.00%*                       0.00%*
            ---------------------------------------------------------------------
</TABLE>

            30/70 Portfolio
<TABLE>
         <S>                    <C>                          <C>
                                Initial Sales Charge         Initial Sales Charge
         Amount of              as % of Net                  as % of Public
         Purchase               Amount Invested              Offering Price
            ---------------------------------------------------------------------
         $0-$49,999             4.71%                        4.50%
            ---------------------------------------------------------------------
         $50,000-$99,999        4.17%                        4.00%
            ---------------------------------------------------------------------
         $100,000-$249,999      3.63%                        3.50%
            ---------------------------------------------------------------------
         $250,000-$499,999      2.56%                        2.50%
            ---------------------------------------------------------------------
         $500,000-$999,999      2.04%                        2.00%
            ---------------------------------------------------------------------
         $1,000,000 +           0.00%*                       0.00%*
            ---------------------------------------------------------------------
</TABLE>

            *As shown, investors that purchase $1,000,000 or more of any
            Portfolio's Class A shares will not pay any initial sales charge
            on the purchase. However, purchasers of $1,000,000 or more of
            Class A shares may be subject to a CDSC of 1% if the shares are
            redeemed during the first 18 months after their purchase. See
            "CDSCs on Class A Shares" below.

- --------------------------------------------------------------------------------
Contingent  Unless you are eligible for a waiver, if you sell (redeem) your
Deferred    Class B or Class C shares within the time periods specified below,
Sales       you will pay a CDSC according to the following schedules.
Charges
(CDSCs)
- -- Class
B and
Class C
Shares


Class B <TABLE>
Shares
         <S>                              <C>                                         <C>
         Years Since Purchase             Percentage Contingent
         Payment was Made                 Deferred Sales Charge
            -----------------------------------------------------------------------------
         First                            5
            -----------------------------------------------------------------------------
         Second                           4
            -----------------------------------------------------------------------------
         Third                            3
            -----------------------------------------------------------------------------
         Fourth                           3
            -----------------------------------------------------------------------------
         Fifth                            2
            -----------------------------------------------------------------------------
         Sixth                            1
            -----------------------------------------------------------------------------
         Seventh                          0*
            -----------------------------------------------------------------------------

            *After the seventh year, Class B shares convert into Class A
            shares.

Class C
Shares
         Years Since Purchase             Percentage Contingent
         Payment was Made                 Deferred Sales Charge
            -----------------------------------------------------------------------------
         First                            1
            -----------------------------------------------------------------------------
         Thereafter                       0
            -----------------------------------------------------------------------------
        </TABLE>


                                                                   Prospectus 30
<PAGE>

- --------------------------------------------------------------------------------
CDSCs on    Unless a waiver applies, investors who purchase $1,000,000 or more
Class A     of Class A shares (and, thus, pay no initial sales charge) will be
Shares      subject to a 1% CDSC if the shares are redeemed within 18 months
            of their purchase. The Class A CDSC does not apply if you are
            otherwise eligible to purchase Class A shares without an initial
            sales charge or if you are eligible for a waiver of the CDSC. See
            "Reductions and Waivers of Initial Sales Charges and CDSCs" below.

- --------------------------------------------------------------------------------
How CDSCs   A CDSC is imposed on redemptions of Class B and Class C shares
are         (and where applicable, Class A shares) on the amount of the
Calculated  redemption which causes the current value of your account for the
            particular class of shares of a Portfolio to fall below the total
            dollar amount of your purchase payments subject to the CDSC.
            However, 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 your account above the amount of the purchase
            payments subject to the CDSC. CDSCs are deducted from the proceeds
            of your redemption, not from amounts remaining in your account. In
            determining whether a CDSC is payable, it is assumed that the
            purchase payment from which the redemption is made is the earliest
            purchase payment for the particular class of shares in your
            account (from which a redemption or exchange has not already been
            effected).

             For instance, the following example illustrates 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 Portfolio 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 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 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
            shares of a particular class of a Portfolio in the shareholder's
            account are aggregated, and the current value of all such shares
            is aggregated.

- --------------------------------------------------------------------------------
Reductions  The initial sales charges on Class A shares and the CDSCs on Class
and         A, Class B and Class C shares may be reduced or waived under
Waivers     certain purchase arrangements and for certain categories of
of          investors. Please see the Guide for details. The Guide is
Initial     available free of charge from the Distributor. See "How to Buy and
Sales       Sell Shares--PIMCO Funds Shareholders' Guide" below.
Charges
and CDSCs

- --------------------------------------------------------------------------------
DistributionThe Portfolios pay fees to the Distributor on an ongoing basis as
and         compensation for the services the Distributor renders and the
Servicing   expenses it bears in connection with the sale and distribution of
(12b-1)     Portfolio shares ("distribution fees") and/or in connection with
Plans       personal services rendered to Portfolio shareholders and the
            maintenance of shareholder accounts ("servicing fees"). These
            payments are made pursuant to Distribution and Servicing Plans
            ("12b-1 Plans") adopted by each Portfolio pursuant to Rule 12b-1
            under the Investment Company Act of 1940.

             There is a separate 12b-1 Plan for each class of shares offered
            in this Prospectus. Class A shares pay only servicing fees. Class
            B and Class C shares pay both distribution and servicing fees. The
            following lists the maximum annual rates at which the distribution
            and/or servicing fees may be paid under each 12b-1 Plan
            (calculated as a percentage of each Portfolio's average daily net
            assets attributable to the particular class of shares):

<TABLE>
         <S>                            <C>                                     <C>
                                        Servicing                               Distribution
         All Portfolios                 Fee                                     Fee
            --------------------------------------------------------------------------------
         Class A                        0.25%                                   None
            --------------------------------------------------------------------------------
         Class B                        0.25%                                   0.75%
            --------------------------------------------------------------------------------
         Class C                        0.25%                                   0.75%
            --------------------------------------------------------------------------------
</TABLE>

             Because 12b-1 fees are paid out of a Portfolio's assets on an
            ongoing basis, over time these fees will increase the cost of your
            investment and may cost you more than sales charges which are
            deducted at the time of investment. Therefore, although Class B
            and Class C shares do not pay initial sales charges, the
            distribution fees payable on Class B and Class C shares may, over
            time, cost you more than the initial sales charge imposed on Class
            A shares. Also, because Class B shares convert into Class A shares
            after they have been held for seven years and are not subject to
            distribution fees after the conversion, an investment in Class C
            shares may cost you more over time than an investment in Class B
            shares.


31 PIMCO Funds: Multi-Manager Series
<PAGE>

            How Portfolio Shares Are Priced

            The net asset value ("NAV") of a Portfolio's Class A, Class B and
            Class C shares is determined by dividing the total value of a
            Portfolio's portfolio investments and other assets attributable to
            that class, less any liabilities, by the total number of shares
            outstanding of that class.

             The assets of each Portfolio consist of shares of the Underlying
            Funds, which are valued at their respective NAVs at the time of
            valuation of the Portfolios' shares. For purposes of calculating
            the NAV of Underlying Fund shares, portfolio securities and other
            assets of the Funds for which market quotes are available are
            stated at market value. Market value is generally determined on
            the basis of last reported sales prices, or if no sales are
            reported, based on quotes obtained from a quotation reporting
            system, established market makers, or pricing services. Certain
            securities or investments for which daily market quotes are not
            readily available may be valued, pursuant to guidelines
            established by the Board of Trustees of the Underlying Fund, with
            reference to other securities or indices. Short-term investments
            having a maturity of 60 days or less are generally valued at
            amortized cost. Exchange traded options, futures and options on
            futures are valued at the settlement price determined by the
            exchange. Other securities for which market quotes are not readily
            available are valued at fair value as determined in good faith by
            the Fund's Board of Trustees or persons acting at the Board's
            direction.

             Underlying Fund investments initially valued in currencies other
            than the U.S. dollar are converted to U.S. dollars using exchange
            rates obtained from pricing services. As a result, the NAV of an
            Underlying Fund's shares may be affected by changes in the value
            of currencies in relation to the U.S. dollar. The value of
            securities traded in markets outside the United States or
            denominated in currencies other than the U.S. dollar may be
            affected significantly on a day that the New York Stock Exchange
            is closed. As a result, to the extent that a Portfolio invests in
            Underlying Funds that hold foreign securities, the NAV of the
            Portfolio's shares may change at times when you can not purchase,
            redeem or exchange shares.

             Portfolio and Underlying Fund shares are valued at the close of
            regular trading (normally 4:00 p.m., Eastern time) (the "NYSE
            Close") on each day that the New York Stock Exchange is open. For
            purposes of calculating the NAV, the Underlying Funds normally use
            pricing data for domestic equity securities received shortly after
            the NYSE Close and do not normally take into account trading,
            clearances or settlements that take place after the NYSE Close.
            Domestic fixed income and foreign securities are normally priced
            using data reflecting the earlier closing of the principal markets
            for those securities. Information that becomes known to the
            Underlying Funds or their agents after the NAV has been calculated
            on a particular day will not generally be used to retroactively
            adjust the price of a security or the NAV determined earlier that
            day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Underlying Funds may value securities at fair
            value or estimate their value as determined in good faith by the
            Fund's Board of Trustees pursuant to procedures approved by the
            Board of Trustees. Fair valuation may also be used by the
            Underlying Fund's Board of Trustees if extraordinary events occur
            after the close of the relevant market but prior to the NYSE
            Close.

            How to Buy and Sell Shares

            The following section provides basic information about how to buy,
            sell (redeem) and exchange shares of the Portfolios.

PIMCO
Funds
Shareholders'
Guide
            More detailed information about the Trust's purchase, sale and
            exchange arrangements for Portfolio shares is provided in the
            PIMCO Funds Shareholders' Guide, which is included in the
            Statement of Additional Information and can be obtained free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107. The Guide provides technical information about the
            basic arrangements described below and also describes special
            purchase, sale and exchange features and programs offered by the
            Trust, including:

            .  Automated telephone and wire transfer procedures
            .  Automatic purchase, exchange and withdrawal programs
            .  Programs that establish a link from your Portfolio account to
               your bank account
            .  Special arrangements for tax-qualified retirement plans
            .  Investment programs which allow you to reduce or eliminate the
               initial sales charges on Class A shares
            .  Categories of investors that are eligible for waivers or
               reductions of initial sales charges and CDSCs

                                                                   Prospectus 32
<PAGE>

Calculation When you buy shares of the Portfolios, you pay a price equal to
of Share    the NAV of the shares, plus any applicable sales charge. When you
Price and   sell (redeem) shares, you receive an amount equal to the NAV of
Redemption  the shares, minus any applicable CDSC. NAVs are determined at the
Payments    close of regular trading (normally, 4:00 p.m., Eastern time) on
            the New York Stock Exchange on each day the New York Stock
            Exchange is open. See "How Portfolio Shares Are Priced" above for
            details. Generally, purchase and redemption orders for Portfolio
            shares are processed at the NAV next calculated after your order
            is received by the Distributor. There are certain exceptions where
            an order is received by a broker or dealer prior to the close of
            regular trading on the New York Stock Exchange and then
            transmitted to the Distributor after the NAV has been calculated
            for that day (in which case the order may be processed at that
            day's NAV). Please see the Guide for details.

             The Trust does not calculate NAVs or process orders on days when
            the New York Stock Exchange is closed. If your purchase or
            redemption order is received by the Distributor on a day when the
            New York Stock Exchange is closed, it will be processed on the
            next succeeding day when the New York Stock Exchange is open (at
            the succeeding day's NAV).

Buying      You can buy Class A, Class B or Class C shares of the Portfolios
Shares      in the following ways:

             . Through your broker, dealer or other financial intermediary.
            Your broker, dealer or other intermediary may establish higher
            minimum investment requirements than the Trust and may also
            independently charge you transaction fees and additional amounts
            (which may vary) in return for its services, which will reduce
            your return. Shares you purchase through your broker, dealer or
            other intermediary will normally be held in your account with that
            firm.

             . Directly from the Trust. To make direct investments, you must
            open an account with the Distributor and send payment for your
            shares either by mail or through a variety of other purchase
            options and plans offered by the Trust.

             If you wish to invest directly by mail, please send a check
            payable to PIMCO Funds Distributors LLC, along with a completed
            application form to:

                                    PIMCO Funds Distributors LLC
                                    P.O. Box 9688
                                    Providence, RI 02940-0926

             The Trust accepts all purchases by mail subject to collection of
            checks at full value and conversion into federal funds. You may
            make subsequent purchases by mailing a check to the address above
            with a letter describing the investment or with the additional
            investment portion of a confirmation statement. Checks for
            subsequent purchases should be payable to PIMCO Funds Distributors
            LLC and should clearly indicate your account number. Please call
            the Distributor at 1-800-426-0107 if you have any questions
            regarding purchases by mail.

             The Guide describes a number of additional ways you can make
            direct investments, including through the PIMCO Funds Auto-Invest
            and PIMCO Funds Fund Link programs. You can obtain a Guide free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107. See "PIMCO Funds Shareholders' Guide" above.

             The Distributor, in its sole discretion, may accept or reject any
            order for purchase of Portfolio shares. No share certificates will
            be issued unless specifically requested in writing.

Investment  The following investment minimums apply for purchases of Class A,
Minimums    Class B and Class C shares:

<TABLE>
<CAPTION>
                     Initial Investment                 Subsequent Investments
                     ------------------                 ----------------------
                     <S>                                <C>
                     $2,500 per Portfolio                 $100 per Portfolio
</TABLE>

             Lower minimums may apply for certain categories of investors,
            including certain tax-qualified retirement plans, and for special
            investment programs and plans offered by the Trust, such as the
            PIMCO Funds Auto-Invest and PIMCO Funds Fund Link programs. Please
            see the Guide for details.

Small
Account
Fee
            Because of the disproportionately high costs of servicing accounts
            with low balances, if you have a direct account with the
            Distributor, you will be charged a fee at the annual rate of $16
            if your account balance for any Portfolio falls below a minimum
            level of $2,500, except for Uniform Gift to Minors, IRA, Roth IRA
            and Auto-Invest accounts for which the limit is $1,000. The fee
            also applies 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

33 PIMCO Funds: Multi-Manager Series
<PAGE>

            apply to IRAs, Roth IRAs and other retirement accounts.) However,
            you will not be charged this fee if the aggregate value of all of
            your PIMCO Funds accounts is at least $50,000. Any applicable
            small account fee will be deducted automatically from your below-
            minimum Portfolio account in quarterly installments and paid to
            the Administrator. Each Portfolio account will normally be valued,
            and any deduction taken, during the last five business days of
            each calendar quarter. Lower minimum balance requirements and
            waivers of the small account fee apply for certain categories of
            investors. Please see the Guide for details.

Minimum     Due to the relatively high cost to the Portfolios of maintaining
Account     small accounts, you are asked to maintain an account balance in
Size        each Portfolio in which you invest of at least the minimum
            investment necessary to open the particular type of account. If
            your balance for any Portfolio remains below the minimum for three
            months or longer, the Administrator has the right (except in the
            case of employer-sponsored retirement accounts) to redeem your
            remaining shares and close that Portfolio account after giving you
            60 days to increase your balance. Your Portfolio account will not
            be liquidated if the reduction in size is due solely to a decline
            in market value of your Portfolio shares or if the aggregate value
            of all your PIMCO Funds accounts exceeds $50,000.

Exchanging  You may exchange your Class A, Class B or Class C shares of any
Shares      Portfolio for the same Class of shares of any other Portfolio or
            of another series of the Trust or PIMCO Funds: Pacific Investment
            Management Series, subject to any restrictions on exchanges set
            forth in the applicable fund's or series' prospectus(es). Shares
            are exchanged on the basis of their respective NAVs next
            calculated after your exchange order is received by the
            Distributor. Currently, the Trust does not charge any exchange
            fees or charges. Exchanges are subject to the $2,500 minimum
            initial purchase requirements for each Portfolio, except with
            respect to tax-qualified programs and exchanges effected through
            the PIMCO Funds Auto-Exchange plan. In addition, an exchange is
            generally a taxable event which will generate capital gains or
            losses, and special rules may apply in computing tax basis when
            determining gain or loss. If you maintain your account with the
            Distributor, you may exchange shares by completing a written
            exchange request and sending it to PIMCO Funds Distributors LLC,
            P.O. Box 9688, Providence, RI 02940-0926. You can get an exchange
            form by calling the Distributor at 1-800-426-0107.

             The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO Advisors, the purchase would adversely
            affect a Portfolio and its shareholders. In particular, a pattern
            of exchanges characteristic of "market-timing" strategies may be
            deemed by PIMCO Advisors to be detrimental to the Trust or a
            particular Portfolio. 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 Portfolio, subsequently exchanges those shares for
            shares of a different 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
            exchange back into the shares of the originally purchased
            Portfolio) more than six round trip exchanges in any twelve-month
            period. Although the Trust has no current intention of terminating
            or modifying the exchange privilege other than as set forth in the
            preceeding sentence, it reserves the right to do so at any time.
            Except as otherwise permitted by the Securities and Exchange
            Commission, the Trust will give you 60 days' advance notice if it
            exercises its right to terminate or materially modify the exchange
            privilege with respect to Class A, B and C shares.

             The Guide provides more detailed information about the exchange
            privilege, including the procedures you must follow and additional
            exchange options. You can obtain a Guide free of charge from the
            Distributor by written request or by calling 1-800-426-0107. See
            "PIMCO Funds Shareholders' Guide" above.

Selling     You can sell (redeem) Class A, Class B or Class C shares of the
Shares      Portfolios in the following ways:

              . Through your broker, dealer or other financial intermediary.
            Your broker, dealer or other intermediary may independently charge
            you transaction fees and additional amounts (which may vary) in
            return for its services, which will reduce your return.

              . Directly from the Trust by Written Request. To redeem shares
            directly from the Trust by written request (whether or not the
            shares are represented by certificates), you must send the
            following items to the Trust's Transfer Agent, PFPC, Inc., P.O.
            Box 9688, Providence, RI 02940-0926:

              (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 number of
              shares to be redeemed;

                                                                   Prospectus 34
<PAGE>

              (2) for certain redemptions described below, a guarantee of all
              signatures on the written request or on the share certificate or
              accompanying stock power, if required, as described under
              "Signature Guarantee" below;

              (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, trustees,
              custodians or guardians, or if the redemption is requested 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 requested
            by and payable to all shareholders of record for the account, and
            to be sent to the address of record for that account. To avoid
            delay in redemption or transfer, if you have any questions about
            these requirements you should contact the Transfer Agent in
            writing or call 1-800-426-0107 before submitting a request.
            Written redemption or transfer requests will not be honored until
            all required documents in the proper form have been received by
            the Transfer Agent. You can not redeem your shares by written
            request to the Trust if they are held in broker "street name"
            accounts--you must redeem through your broker.

             If the proceeds of your redemption (i) are to be paid to a person
            other than the record owner, (ii) are to be sent to an address
            other than the address of the account on the Transfer Agent's
            records, and/or (iii) are to be paid to a corporation,
            partnership, trust or fiduciary, the signature(s) on the
            redemption request and on the certificates, if any, or stock power
            must be guaranteed as described under "Signature Guarantee" below.
            The Distributor may, however, waive the signature guarantee
            requirement for redemptions up to $2,500 by a trustee of a
            qualified retirement plan, the administrator for which has an
            agreement with the Distributor.

             The Guide describes a number of additional ways you can redeem
            your shares, including:

              . Telephone requests to the Transfer Agent
              . PIMCO Funds Automated Telephone System (ATS)
              . Expedited wire transfers
              . Automatic Withdrawal Plan
              . PIMCO Funds Fund Link

             Unless you specifically elect otherwise, your initial account
            application permits you to redeem shares by telephone subject to
            certain requirements. To be eligible for ATS, expedited wire
            transfer, Automatic Withdrawal Plan, and Fund Link privileges, you
            must specifically elect the particular option on your account
            application and satisfy certain other requirements. The Guide
            describes each of these options and provides additional
            information about selling shares. You can obtain a Guide free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107.

             Other than an applicable CDSC, you will not pay any special fees
            or charges to the Trust or the Distributor when you sell your
            shares. However, if you sell your shares through your broker,
            dealer or other financial intermediary, that firm may charge you a
            commission or other fee for processing your redemption request.

             Redemptions of Portfolio shares may be suspended when trading on
            the New York Stock Exchange is restricted or during an emergency
            which makes it impracticable for the Portfolios or the Underlying
            Funds to dispose of their securities or to determine fairly the
            value of their net assets, or during any other period as permitted
            by the Securities and Exchange Commission for the protection of
            investors. Under these and other unusual circumstances, the Trust
            may suspend redemptions or postpone payments for more than seven
            days, as permitted by law.

Timing of
Redemption
Payments
            Redemption proceeds will normally be mailed to the redeeming
            shareholder within seven calendar 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 proceeds 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. Under unusual circumstances, the Trust
            may delay your redemption payments for more than seven days, as
            permitted by law.

35 PIMCO Funds: Multi-Manager Series
<PAGE>

Redemptions The Trust has agreed to redeem shares of each Portfolio solely in
In Kind     cash 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 may 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. If your shares are redeemed in kind,
            you may incur transaction costs upon the disposition of the
            securities received in the distribution.

CertificatedIf you are redeeming shares for which certificates have been
Shares      issued, the certificates must be mailed to or deposited with the
            Trust, duly endorsed or accompanied by a duly endorsed stock power
            or by a written request for redemption. Signatures must be
            guaranteed as described under "Signature Guarantee" below. The
            Trust may request further documentation from institutions or
            fiduciary accounts, such as corporations, custodians (e.g., under
            the Uniform Gifts to Minors Act), executors, administrators,
            trustees or guardians. Your redemption request and stock power
            must be signed exactly as the account is registered, including
            indication of any special capacity of the registered owner.

Signature   When a signature guarantee is called for, you should have
Guarantee   "Signature Guaranteed" stamped under your signature and guaranteed
            by any of the following entities: U.S. banks, foreign banks having
            a U.S. correspondent bank, credit unions, savings associations,
            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 guarantee
            pursuant to its written signature guarantee standards or
            procedures, 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 requirements from time to time upon notice to
            shareholders, which may be given by means of a new or supplemented
            Prospectus.

            Portfolio Distributions

            Each Portfolio distributes substantially all of its net investment
            income to shareholders in the form of dividends. You begin earning
            dividends on Portfolio shares the day after the Trust receives
            your purchase payment. 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 expected to be lower than dividends on Class A shares as a
            result of the distribution fees applicable to Class B and Class C
            shares. The following shows when each Portfolio intends to declare
            and distribute income dividends to shareholders of record.

<TABLE>
<CAPTION>
          Portfolio             At Least Annually           Quarterly           Monthly
            ---------------------------------------------------------------------------
         <S>                    <C>                         <C>                 <C>
          90/10 Portfolio               .
            ---------------------------------------------------------------------------
          60/40 Portfolio                                       .
            ---------------------------------------------------------------------------
          30/70 Portfolio                                                          .
            ---------------------------------------------------------------------------
</TABLE>

             In addition, each Portfolio distributes any net capital gains it
            earns from the sale of portfolio securities to shareholders no
            less frequently than annually. Net short-term capital gains may be
            paid more frequently.

             You can choose from the following distribution options:

            .  Reinvest all distributions in additional shares of the same
               class of your Portfolio at NAV. This will be done unless you
               elect another option.

            .  Invest all distributions in shares of the same class of any
               other Portfolio or another series of the Trust or PIMCO Funds:
               Pacific Investment Management Series which offers that class at
               NAV. You must have an account existing in the Portfolio or
               series selected for investment with the identical registered
               name. You must elect this option on your account application or
               by a telephone request to the Transfer Agent at 1-800-426-0107.

            .  Receive all distributions in cash (either paid directly to you
               or credited to your account with your broker or other financial
               intermediary). You must elect this option on your account
               application or by a telephone request to the Transfer Agent at
               1-800-426-0107.

                                                                   Prospectus 36
<PAGE>

             You do not pay any sales charges on shares you receive through
            the reinvestment of Portfolio distributions.

             If you elect to receive Portfolio distributions in cash and the
            postal or other delivery service is unable to deliver checks to
            your address of record, the Trust's Transfer Agent will hold the
            returned checks for your benefit in a non-interest bearing
            account.

             For further information on distribution options, please contact
            your broker or call the Distributor at 1-800-426-0107.

            Tax Consequences

             . Taxes on Portfolio distributions. If you are subject to U.S.
            federal income tax, you will be subject to tax on Portfolio
            distributions whether you received them in cash or reinvested them
            in additional shares. For federal income tax purposes, Portfolio
            distributions will be taxable to you as either ordinary income or
            capital gains.

             Portfolio dividends (i.e., distributions of investment income)
            are taxable to you as ordinary income. Federal taxes on Portfolio
            distributions of gains are determined by how long the Portfolio
            owned the investments that generated the gains, rather than how
            long you have owned your shares. Distributions of gains from
            investments that a Portfolio owned for more than 12 months will
            generally be taxable to you as capital gains. Distributions of
            gains from investments that the Portfolio owned for 12 months or
            less will generally be taxable to you as ordinary income.

             Portfolio distributions are taxable to you even if they are paid
            from income or gains earned by a Portfolio prior to your
            investment and thus were included in the price you paid for your
            shares. For example, if you purchase shares on or just before the
            record date of a Portfolio distribution, you will pay full price
            for the shares and may receive a portion of your investment back
            as a taxable distribution.

             The Portfolios' use of a fund of funds structure could affect the
            amount, timing and character of distributions to shareholders. See
            "Taxation--Distributions" in the Statement of Additional
            Information.

             . Taxes when you sell (redeem) or exchange your shares. Any gain
            resulting from the sale of Portfolio shares will generally be
            subject to federal income tax. When you exchange shares of a
            Portfolio for shares of another Portfolio or series of the Trust,
            the transaction will be treated as a sale of the first Portfolio's
            shares for these purposes, and any gain on those shares will
            generally be subject to federal income tax.

             This section relates only to federal income tax consequences of
            investing in the Portfolios; the consequences under other tax laws
            may differ. You should consult your tax advisor as to the possible
            application of foreign, state and local income tax laws to
            Portfolio dividends and capital distributions. Please see the
            Statement of Additional Information for additional information
            regarding the tax aspects of investing in the Portfolios.


37 PIMCO Funds: Multi-Manager Series
<PAGE>




                      (This page left blank intentionally)




                                                                   Prospectus 38
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help you understand
            the financial performance of Class A, Class B and Class C shares
            of each Portfolio since the class of shares was first offered.
            Certain information reflects financial results for a single
            Portfolio share. The total returns in the table represent the rate
            that an investor would have earned or lost on an investment in a
            particular class of shares of a Portfolio, assuming reinvestment
            of all dividends and distributions. This information has been
            audited by PricewaterhouseCoopers LLP, whose report, along with
            each Portfolio's financial statements, are included in the Trust's
            annual report to shareholders. The annual report is incorporated
            by reference in the Statement of Additional Information and is
            available free of charge upon request from the Distributor.

<TABLE>
<CAPTION>
 Year or                                          Net Realized/                   Dividends  Dividends in
 Period             Net Asset Value      Net        Unrealized    Total Income    From Net   Excess of Net
 Ended                 Beginning     Investment   Gain (Loss) on From Investment Investment   Investment
                       of Period    Income (Loss)  Investments     Operations      Income       Income
- ----------------------------------------------------------------------------------------------------------
<S>                 <C>             <C>           <C>            <C>             <C>         <C>
90/10 Portfolio
 Class A
 09/30/98-06/30/99      $10.00        $0.16(a)       $2.19(a)         $2.35        $(0.15)      $(0.03)
 Class B
 09/30/98-06/30/99       10.00         0.16(a)        2.13(a)          2.29         (0.15)       (0.03)
 Class C
 09/30/98-06/30/99       10.00         0.07(a)        2.22(a)          2.29         (0.15)       (0.03)

60/40 Portfolio
 Class A
 09/30/98-06/30/99      $10.00        $0.31(a)       $1.23(a)         $1.54        $(0.27)       $0.00
 Class B
 09/30/98-06/30/99       10.00         0.16(a)        1.31(a)          1.47         (0.22)        0.00
 Class C
 09/30/98-06/30/99       10.00         0.18(a)        1.29(a)          1.47         (0.23)        0.00

30/70 Portfolio
 Class A
 09/30/98-06/30/99      $10.00        $0.58(a)       $0.11(a)         $0.69        $(0.36)       $0.00
 Class B
 09/30/98-06/30/99       10.00         0.32(a)        0.31(a)          0.63         (0.31)        0.00
 Class C
 09/30/98-06/30/99       10.00         0.26(a)        0.36(a)          0.62         (0.32)        0.00
</TABLE>

- -------
* Annualized
 (a) Per share amounts based upon average number of shares outstanding during
the period.

39 PIMCO Funds: Multi-Manager Series
<PAGE>



<TABLE>
<CAPTION>
                                                                               Ratio of Net
                                                                  Ratio of      Investment
                        Net Asset                                Expenses to Income (Loss) to
   Total              Value End of               Net Assets End  Average Net   Average Net      Portfolio
Ditributionss             Period   Total Return of Period (000s)   Assets         Assets      Turnover Rate
  ---------------------------------------------------------------------------------------------------------
  <S>                 <C>          <C>          <C>              <C>         <C>              <C>
              $(0.18)    $12.17       23.69%         $  647         0.65%*        1.91%*           48%
               (0.18)     12.11       23.03           1,920         1.40*         1.87*            48
               (0.18)     12.11       23.03           7,969         1.40*         0.77*            48
              $(0.27)    $11.27       15.50%         $2,196         0.65%*        3.76%*           39%
               (0.22)     11.25       14.83           3,653         1.40*         1.92*            39
               (0.23)     11.24       14.82           9,826         1.40*         2.14*            39

              $(0.36)    $10.33        6.91%         $  407         0.65%*        7.54%*           37%

               (0.31)     10.32        6.29           1,738         1.40*         4.09*            37
               (0.32)     10.30        6.27           4,969         1.40*         3.39*            37
</TABLE>

                                                                   Prospectus 40
<PAGE>


           --------------------------------------------------------------------
PIMCO FundsINVESTMENT ADVISER AND ADMINISTRATOR
Asset      PIMCO Advisors L.P., 800 Newport Center Drive, Newport Beach, CA
Allocation 92660
Series     --------------------------------------------------------------------
           DISTRIBUTOR
           PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT
           06902
           --------------------------------------------------------------------
           CUSTODIAN
           State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, MO
           64105
           --------------------------------------------------------------------
           SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT
           PFPC, Inc., P.O. Box 9688, Providence, RI 02940
           --------------------------------------------------------------------
           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.


                                                     Not part of the Prospectus
<PAGE>

Investment Advisor and Administrator
PIMCO Advisors L.P.
800 Newport Center Drive Newport
Beach, CA 92660

Distributor
PIMCO Funds Distributors LLC
2187 Atlantic Street
Stamford, CT 06902

Custodian
State Street Bank & Trust Co.
801 Pennsylvania
Kansas City, MO 64105

Shareholder Servicing Agent and Transfer Agent
PFPC, Inc.
Box 9688
Providence, RI 02940

Independent Accountants
PricewaterhouseCoopers LLP
1055 Broadway
Kansas City, MO 64105

Legal Counsel
Ropes & Gray
One International Place
Boston, MA 02110

For further information about
PIMCO Funds Asset Allocation Series, call
1-800-426-0107 or visit our Web site
at www.pimcofunds.com


[PIMCO FUNDS LOGO APPEARS HERE]

PIMCO Funds

2187 Atlantic Street
Stamford, CT 06877



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