VANGUARD SPECIALIZED PORTFOLIOS INC
485BPOS, 1997-05-23
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<PAGE>   1
 
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                                   FORM N-1A
                   REGISTRATION STATEMENT (NO. 2-88116) UNDER
                           THE SECURITIES ACT OF 1933
                          PRE-EFFECTIVE AMENDMENT NO.                        [X]
                        POST-EFFECTIVE AMENDMENT NO. 23
                                      AND
 
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940
                                AMENDMENT NO. 25
                     VANGUARD SPECIALIZED PORTFOLIOS, INC.
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                  POST OFFICE BOX 2600, VALLEY FORGE, PA 19482
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
 
                  REGISTRANT'S TELEPHONE NUMBER (610) 669-1000
 
                         RAYMOND J. KLAPINSKY, ESQUIRE
                                  P.O. BOX 876
                             VALLEY FORGE, PA 19482
 
               IT IS PROPOSED THAT THIS FILING BECOME EFFECTIVE:
   
             On May 30, 1997 pursuant to paragraph (b) of Rule 485.
    
 
                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
  As soon as practicable after this Registration Statement becomes effective.
 
   
     WE HAVE ELECTED TO REGISTER AN INDEFINITE NUMBER OF SHARES PURSUANT TO
REGULATION 24F-2 UNDER THE INVESTMENT COMPANY ACT OF 1940. WE FILED OUR RULE
24F-2 NOTICE FOR THE YEAR ENDED JANUARY 31, 1997 ON MARCH 13, 1997.
    
 
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<PAGE>   2
 
                     VANGUARD SPECIALIZED PORTFOLIOS, INC.
 
                             CROSS REFERENCE SHEET
 
<TABLE>
<CAPTION>
FORM N-1A
ITEM NUMBER                                                           LOCATION IN PROSPECTUS
<C>           <S>                                              <C>
    Item 1.   Cover Page....................................   Cover Page
    Item 2.   Synopsis......................................   Highlights
    Item 3.   Condensed Financial Information...............   Financial Highlights: Fund Expenses
    Item 4.   General Description of Registrant.............   Investment Objectives; Investment
                                                               Policies; Investment Limitations;
                                                               General Information
    Item 5.   Management of the Fund........................   Management of the Fund; Investment
                                                               Advisers
    Item 6.   Capital Stock and Other Securities............   Opening an Account and Purchasing
                                                               Shares; Selling Your Shares; The
                                                               Share Price of each Portfolio;
                                                               Dividends, Capital Gains and Taxes;
                                                               General Information
    Item 7.   Purchase of Securities Being Offered..........   Cover Page; Opening an Account and
                                                               Purchasing Shares
    Item 8.   Redemption or Repurchase......................   Selling Your Shares
    Item 9.   Pending Legal Proceedings.....................   Not Applicable
 
FORM N-1A
ITEM NUMBER                                                    LOCATION IN STATEMENT
                                                               OF ADDITIONAL INFORMATION
 
   Item 10.   Cover Page....................................   Cover Page
   Item 11.   Table of Contents.............................   Cover Page
   Item 12.   General Information and History...............   Investment Objectives and Policies;
                                                               General Information
   Item 13.   Investment Objective and Policies.............   Investment Objectives and Policies;
                                                               Investment Limitations
   Item 14.   Management of the Fund........................   Management of the Fund
   Item 15.   Control Persons and Principal Holders of
              Securities....................................   Management of the Fund; General
                                                               Information
   Item 16.   Investment Advisory and Other Services........   Management of the Fund; Investment
                                                               Advisory Services
   Item 17.   Brokerage Allocation..........................   Not Applicable
   Item 18.   Capital Stock and Other Securities............   Financial Statements
   Item 19.   Purchase, Redemption and Pricing of Securities
              Being Offered.................................   Purchase of Shares; Redemption of
                                                               Shares
   Item 20.   Tax Status....................................   Appendix
   Item 21.   Underwriters..................................   Not Applicable
   Item 22.   Calculations of Yield Quotations of Money
              Market Fund...................................   Not Applicable
   Item 23.   Financial Statements..........................   Financial Statements
</TABLE>
<PAGE>   3
 
================================================================================
 
                                                  A Member of The Vanguard Group
VANGUARD SPECIALIZED PORTFOLIOS
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
PROSPECTUS -- MAY 30, 1997
- --------------------------------------------------------------------------------
 
NEW ACCOUNT INFORMATION: INVESTOR INFORMATION DEPARTMENT -- 1-800-662-7447
(SHIP)
- --------------------------------------------------------------------------------
 
SHAREHOLDER ACCOUNT SERVICES: CLIENT SERVICES DEPARTMENT -- 1-800-662-2739
(CREW)
- --------------------------------------------------------------------------------
 
   
INVESTMENT
OBJECTIVE
AND POLICIES          Vanguard Specialized Portfolios, Inc. (the "Fund") is an
                      open-end diversified investment company. The Fund consists
                      of five Portfolios that invest primarily in common stocks
                      and other equity securities concentrated in a particular
                      industry or group of related industries. Three Portfolios
                      of the Fund (Energy, Gold & Precious Metals and Health
                      Care) seek to provide long-term capital appreciation. Two
                      Portfolios (Utilities Income and REIT Index) seek to
                      provide current income and moderate growth of capital and
                      income. This Prospectus relates only to the Energy, Gold &
                      Precious Metals and Health Care Portfolios (the
                      "Portfolios"). The REIT Index and Utilities Income
                      Portfolios are described in separate Prospectuses. Given
                      their specialized focus, the Portfolios should not be
                      considered a complete investment program. There is no
                      assurance that the Portfolios will achieve their stated
                      objectives. Shares of the Fund are neither insured nor
                      guaranteed by any agency of the U.S. Government, including
                      the FDIC.
    
 
- --------------------------------------------------------------------------------
 
OPENING AN
ACCOUNT               To open a regular (non-retirement) account, please
                      complete and return the Account Registration Form. If you
                      need assistance in completing this Form, please call our
                      Investor Information Department. To open an Individual
                      Retirement Account (IRA), please use a Vanguard IRA
                      Adoption Agreement. To obtain a copy of this form, call
                      1-800-662-7447, Monday through Friday, from 8:00 a.m. to
                      9:00 p.m. (Eastern time), and Saturday, from 9:00 a.m. to
                      4:00 p.m. (Eastern time). The minimum initial investment
                      is $3,000 per Portfolio or $1,000 for Uniform
                      Gifts/Transfers to Minors Act accounts. The Fund is
                      offered on a no-load basis (i.e., there are no sales
                      commissions or 12b-1 fees). However, the Fund incurs
                      expenses for investment advisory, management,
                      administrative, and distribution services.
 
IMPORTANT NOTE:
1% REDEMPTION FEE     If shares of the Portfolios are redeemed or exchanged
                      prior to being held for one year, they will be subject to
                      a 1% redemption fee. See "Fund Expenses."
 
- --------------------------------------------------------------------------------
 
   
ABOUT THIS
PROSPECTUS            This Prospectus is designed to set forth concisely the
                      information you should know about the Fund before you
                      invest. It should be retained for future reference. A
                      "Statement of Additional Information" containing
                      additional information about the Fund has been filed with
                      the Securities and Exchange Commission. Such Statement is
                      dated May 30, 1997, and has been incorporated by reference
                      into this Prospectus. A copy may be obtained without
                      charge by writing to the Fund or by calling the Investor
                      Information Department. The Securities and Exchange
                      Commission maintains a website (http://www.sec.gov) which
                      contains the Statement of Additional Information, material
                      incorporated by reference, and other information regarding
                      the Fund.
    
 
- --------------------------------------------------------------------------------
 
TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                   Page                                        Page                                        Page
<S>                               <C>       <C>                               <C>       <C>                               <C>
Highlights........................   2      Who Should Invest.................   11     SHAREHOLDER GUIDE
Fund Expenses.....................   4      Implementation of Policies........   11     Opening an Account and
Financial Highlights..............   5      Investment Limitations............   14     Purchasing Shares.................   21
Yield and Total Return............   7      Management of the Fund............   15     When Your Account Will Be              
FUND INFORMATION                            Investment Advisers...............   15     Credited..........................   24
Investment Objectives.............   7      Dividends, Capital Gains and                Exchanging Your Shares............   26
Investment Policies...............   7      Taxes.............................   18     Selling Your Shares...............   24
Investment Risks...............      9      The Share Price of Each                     Important Information About
                                            Portfolio.........................   19     Exchanging Your Shares............   26
                                            General Information...............   20     Important Information About
                                                                                        Telephone Transactions............   28
                                                                                        Transferring Registration.........   29
                                                                                        Other Vanguard Services...........   29
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
- --------------------------------------------------------------------------------
<PAGE>   4
 
                                   HIGHLIGHTS
 
   
OBJECTIVE AND
POLICIES              The Fund is an open-end diversified investment company.
                      The Fund consists of five Portfolios that invest primarily
                      in common stocks and other equity securities concentrated
                      in a particular industry or group of related industries.
                      This Prospectus relates only to the Energy, Gold &
                      Precious Metals and Health Care Portfolios. These
                      Portfolios seek to provide long-term capital appreciation.
                      There is no assurance that any Portfolio will achieve its
                      stated objective.                                   PAGE 8
    
- --------------------------------------------------------------------------------
 
RISK
CHARACTERISTICS       Each Portfolio of the Fund is subject to market risk and
                      industry risk. Market risk is the possibility that stock
                      prices will decline over short or even extended periods.
                      The stock market tends to be cyclical, with periods when
                      stock prices generally rise and periods when stock prices
                      generally decline. Each Portfolio is expected to be
                      strongly influenced by these broad fluctuations in stock
                      prices.
 
   
                      In addition, unlike more widely-diversified mutual funds,
                      the Portfolios are subject to industry risk, the
                      possibility that a particular group of related stocks will
                      decline in price due to industry-specific developments.
                      Securities held by the Energy Portfolio will be influenced
                      by cyclical fluctuations in the supply and demand for oil,
                      as well as tax and regulatory policies, conservation
                      trends, and international oil politics. The Gold &
                      Precious Metals Portfolio will be subject to the highly
                      volatile and often erratic markets for gold and precious
                      metals and for the common stocks of mining companies.
                      Investments relating to gold and precious metals or
                      minerals are considered speculative, and are affected by a
                      host of world-wide economic, financial and political
                      factors. Stocks held by the Health Care Portfolio will be
                      affected by government policies on health care
                      reimbursements, regulatory approval for new drugs and
                      medical instruments, and similar matters.          PAGE 10
    
- --------------------------------------------------------------------------------
 
   
THE VANGUARD
GROUP                 The Fund is a member of The Vanguard Group of Investment
                      Companies, a group of more than 30 investment companies
                      with more than 90 distinct investment portfolios and total
                      assets in excess of $260 billion. The Vanguard Group, Inc.
                      ("Vanguard"), a subsidiary jointly owned by the Vanguard
                      funds, provides on an at-cost basis all corporate
                      management, administrative, distribution, marketing and
                      shareholder accounting services to the funds in the
                      Group.                                             PAGE 17
    
- --------------------------------------------------------------------------------
 
   
INVESTMENT
ADVISERS              Wellington Management Company, LLP serves as investment
                      adviser to the Energy and Health Care Portfolios. M&G
                      Investment Management Limited serves as investment adviser
                      to the Gold & Precious Metals Portfolio.           PAGE 18
    
- --------------------------------------------------------------------------------
 
   
DIVIDENDS, CAPITAL
GAINS AND TAXES       Distributions of net investment income are expected to be
                      made annually for the Energy, Gold & Precious Metals and
                      Health Care Portfolios. Capital gains, if any, will be
                      distributed annually. Dividend and capital gains
                      distributions are generally subject to federal, state and
                      local income taxes. Also, a sale of shares -- whether by
                      outright redemption or exchange -- is a taxable event and
                      may result in a capital gain or loss.
    
                                                                         PAGE 21
- --------------------------------------------------------------------------------
 
                                        2
<PAGE>   5
 
PURCHASING
SHARES                You may purchase shares by mail, wire, or exchange from
                      another Vanguard Fund. The minimum initial investment is
                      $3,000 per Portfolio; the minimum for subsequent
                      investments is $100. There are no sales commissions or
                      12b-1 fees.                                        PAGE 25
- --------------------------------------------------------------------------------
 
   
SELLING SHARES        You may redeem shares of each Portfolio by mail or by
                      telephone. The Energy, Gold & Precious Metals and Health
                      Care Portfolios assess a 1% redemption fee on shares held
                      less than 12 months. Each Portfolio's share price is
                      expected to fluctuate, and at the time of redemption may
                      be more or less than at the time of initial purchase,
                      resulting in a gain or loss.                       PAGE 28
    
- --------------------------------------------------------------------------------
 
   
EXCHANGING
SHARES                You may exchange a Portfolio's shares for those of another
                      Portfolio of the Fund or other available Vanguard Funds.
                      An exchange from the Energy, Gold & Precious Metals and
                      Health Care Portfolios will be subject to a 1% redemption
                      fee on shares held for less than 12 months.        PAGE 31
    
- --------------------------------------------------------------------------------
 
   
SPECIAL
CONSIDERATIONS        (1) Under normal circumstances, at least 80% of the assets
                      of each Portfolio will be invested in equity securities
                      concentrated in a particular industry or group of
                      industries. As a result, a Portfolio of the Fund may be
                      subject to greater fluctuations in market value than a
                      mutual fund which invests in a more widely-diversified
                      group of stocks. Due to the specialized focus of the
                      individual Portfolios, an investment in a Portfolio should
                      not be considered a complete investment program.   PAGE  9
    
 
                      (2) The Gold & Precious Metals Portfolio may invest all of
                      its assets in foreign securities, and each of the other
                      Portfolios of the Fund may invest a portion of its assets
                      in foreign securities. Each Portfolio may enter into
                      forward foreign exchange contracts in order to protect
                      against uncertainty in the level of future foreign
                      exchange rates, but not for speculative purposes.  PAGE 15
 
                      (3) Each Portfolio may lend its securities.        PAGE 16
- --------------------------------------------------------------------------------
 
                                        3
<PAGE>   6
 
   
FUND EXPENSES         The following table illustrates ALL expenses and fees that
                      you would incur as a shareholder of the respective
                      Portfolios. The expenses and fees set forth in the table
                      are based upon expenses incurred in the fiscal year ended
                      January 31, 1997.
    
 
   
<TABLE>
<CAPTION>
                                                                                               GOLD &
                                                                                              PRECIOUS     HEALTH
                                                                                   ENERGY      METALS       CARE
                                     SHAREHOLDER TRANSACTION EXPENSES             PORTFOLIO   PORTFOLIO   PORTFOLIO
                           ----------------------------------------------------------------------------------------
                           <S>                                                    <C>         <C>         <C>
                           Sales Load Imposed on Purchases......................     None        None        None
                           Sales Load Imposed on Reinvested Dividends...........     None        None        None
                           Redemption Fees*.....................................        1%          1%          1%
                           Exchange Fees**......................................     None        None        None
                            *The 1% fee withheld from redemption proceeds of shares held for less than one year is
                             paid to the Portfolio.
                           ** Exchanges will be treated as redemptions for purposes of imposing the redemption
                             fees.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                               GOLD &
                                                                                              PRECIOUS     HEALTH
                                                                                   ENERGY      METALS       CARE
                                         ANNUAL OPERATING EXPENSES                PORTFOLIO   PORTFOLIO   PORTFOLIO
                           ----------------------------------------------------------------------------------------
                           <S>                                                    <C>         <C>         <C>
                           Management & Administrative Expenses.................     0.24%*      0.25%*      0.24%*
                           Investment Advisory Fees.............................     0.10        0.18        0.10
                           12b-1 Fees...........................................     None        None        None
                           Other Expenses
                             Distribution Costs.................................     0.02*       0.02*       0.02*
                             Miscellaneous Expenses.............................     0.03        0.05        0.02
                                                                                  --------    --------    --------
                           Total Other Expenses.................................     0.05%       0.07%       0.04%
                                                                                  --------    --------    --------
                               TOTAL OPERATING
                                 EXPENSES.......................................     0.39%       0.50%       0.38%
                                                                                  ========    ========    ========
                           *Redemption fees paid by shareholders are used to reduce these expenses. The expenses
                            shown exclude such reductions.
</TABLE>
    
 
   
1% REDEMPTION FEE     The Energy, Gold & Precious Metals, and Health Care
                      Portfolios are intended for long-term investors who can
                      withstand substantial price fluctuation. For this reason,
                      the Portfolios assess a 1% redemption fee on shares that
                      are redeemed or exchanged before they have been held for
                      one year. Solely for purposes of calculating the one-year
                      holding period, the Portfolio uses the "first-in,
                      first-out" (FIFO) method. That is, the date of any
                      redemption or exchange will be compared to the earliest
                      purchase date. If this holding period is less than one
                      year, the fee will be assessed. The fee will be prorated
                      if a portion of the shares being redeemed or exchanged has
                      been held for more than one year. Shares acquired through
                      reinvested dividend or capital gain distributions are
                      exempt from the fee.
    
 
   
                      The following example illustrates the expenses that you
                      would incur on a $1,000 investment over various periods,
                      assuming (1) a 5% annual rate of return and (2) redemption
                      at the end of each period. The 1% redemption fee is not
                      included in the expenses because the time periods
                      illustrated are one year or more.
    
 
                                        4
<PAGE>   7
 
   
<TABLE>
<CAPTION>
                                                             1 YEAR    3 YEARS    5 YEARS    10 YEARS
                                                             -------   --------   --------   ---------
                        <S>                                  <C>       <C>        <C>        <C>
                        Energy Portfolio...................    $ 4       $ 13       $ 22        $49
                        Gold & Precious Metals Portfolio...    $ 5       $ 16       $ 28        $63
                        Health Care Portfolio..............    $ 4       $ 12       $ 21        $48
</TABLE>
    
 
                      THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF
                      PAST OR FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES
                      MAY BE HIGHER OR LOWER THAN THOSE SHOWN.
- --------------------------------------------------------------------------------
 
   
FINANCIAL
HIGHLIGHTS            The following financial highlights for a share outstanding
                      throughout each period have been audited by Price
                      Waterhouse LLP, independent accountants, whose report on
                      the financial statements which include this information
                      was unqualified. This information should be read in
                      conjunction with the Fund's financial statements and notes
                      thereto, which together with the remaining portions of the
                      Fund's 1997 Annual Report to Shareholders, are
                      incorporated by reference in the Statement of Additional
                      Information and in this Prospectus, and which appear,
                      along with the report of Price Waterhouse LLP, in the
                      Fund's 1997 Annual Report to Shareholders. For a more
                      complete discussion of the Fund's performance, please see
                      the Fund's 1997 Annual Report to Shareholders which may be
                      obtained without charge by writing to the Fund or by
                      calling our Investor Information Department at
                      1-800-662-7447.
    
   
<TABLE>
<CAPTION>
                                                 ---------------------------------------------------------------------------------
                                                                                ENERGY PORTFOLIO
                                                 ---------------------------------------------------------------------------------
                                                                             YEAR ENDED JANUARY 31,
                                                 ---------------------------------------------------------------------------------
                                                1997       1996       1995       1994       1993       1992       1991       1990
<S>                                            <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR............ $17.19     $13.82     $15.77     $13.82     $12.73     $13.39     $14.94     $12.29
                                                -----     ------     ------     ------     ------     ------     ------     ------
INVESTMENT OPERATIONS
 Net Investment Income........................    .25        .27        .23        .31        .34        .42        .45        .38
 Net Realized and Unrealized Gain (Loss) on
   Investments................................   6.64       3.68      (1.65)      3.31       1.29       (.24)      (.66)      3.20
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL FROM INVESTMENT OPERATIONS...........   6.89       3.95      (1.42)      3.62       1.63        .18       (.21)      3.58
- ----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income..........................   (.24)      (.28)      (.24)      (.29)      (.36)      (.42)      (.46)      (.36)
 Distributions from Realized
   Capital Gains..............................   (.40)      (.30)      (.29)     (1.38)      (.18)      (.42)      (.88)      (.57)
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL DISTRIBUTIONS........................   (.64)      (.58)      (.53)     (1.67)      (.54)      (.84)     (1.34)      (.93)
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.................. $23.44     $17.19     $13.82     $15.77     $13.82     $12.73     $13.39     $14.94
==================================================================================================================================
TOTAL RETURN*.................................  40.32%     28.68%     (9.15)%    27.31%     13.02%      1.27%     (1.64)%    28.98%
==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)............   $989       $505       $433       $339       $164       $124       $114        $80
Ratio of Expenses to Average Net Assets.......  0.39%       0.51%+     0.30%      0.17%      0.21%      0.30%      0.35%      0.38%
Ratio of Net Investment Income to Average Net
 Assets.......................................   1.36%      1.55%      1.66%      1.87%      2.47%      2.78%      3.24%      3.05%
Portfolio Turnover Rate.......................     15%        21%        13%        41%        37%        42%        40%        44%
Average Commission Rate Paid.................. $.0484        N/A        N/A        N/A        N/A        N/A        N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
 +Effective in fiscal 1996, does not include reductions from directed brokerage arrangements. The 1996 Ratio of Expenses to
  Average Net Assets is .48% after including these reductions.
 
<CAPTION>
 
                                                 1989       1988
<S>                                            <C>         <C>   
- -----------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR............  $10.22     $12.42
                                                ------     ------
INVESTMENT OPERATIONS
 Net Investment Income........................     .36        .61
 Net Realized and Unrealized Gain (Loss) on
   Investments................................    2.08       (.64)
                                                 -----      -----
   TOTAL FROM INVESTMENT OPERATIONS...........    2.44       (.03)
- -----------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income..........................    (.37)      (.76)
 Distributions from Realized
   Capital Gains..............................      --      (1.41)
                                                 -----      -----
   TOTAL DISTRIBUTIONS........................    (.37)     (2.17)
- -----------------------------------------------------------------
NET ASSET VALUE, END OF YEAR..................  $12.29     $10.22
=================================================================
TOTAL RETURN*.................................   24.16%      0.76%
=================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)............     $43        $36
Ratio of Expenses to Average Net Assets.......    0.40%      0.38%
Ratio of Net Investment Income to Average Net
 Assets.......................................    3.07%      3.70%
Portfolio Turnover Rate.......................      46%        84%
Average Commission Rate Paid..................     N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
 +Effective in fiscal 1996, does not include reductions from directed brokerage arrangements. The 1996 Ratio of Expenses to
  Average Net Assets is .48% after including these reductions.
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
                                        5
<PAGE>   8
   
<TABLE>
<CAPTION>
                                                ---------------------------------------------------------------------------------
                                                                        GOLD & PRECIOUS METALS PORTFOLIO
                                                ---------------------------------------------------------------------------------
                                                                             YEAR ENDED JANUARY 31,
                                                ---------------------------------------------------------------------------------
                                               1997        1996       1995       1994       1993       1992       1991       1990
<S>                                           <C>         <C>        <C>        <C>        <C>        <C>        <C>        <C>
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR...........  $14.07     $10.71     $13.58      $7.29      $9.41      $8.29     $12.49      $9.65
                                               ------     ------     ------     ------     ------     ------     ------     ------
INVESTMENT OPERATIONS
 Net Investment Income.......................     .13        .17        .27        .20        .19        .24        .29        .27
 Net Realized and Unrealized Gain (Loss) on
   Investments...............................   (2.98)      3.36      (2.83)      6.30      (2.13)      1.13      (4.17)      2.91
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL FROM INVESTMENT OPERATIONS..........   (2.85)      3.53      (2.56)      6.50      (1.94)      1.37      (3.88)      3.18
- ----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income.........................    (.21)      (.17)      (.31)      (.21)      (.18)      (.25)      (.32)      (.34)
 Distributions from Realized
   Capital Gains.............................    (.07)        --         --         --         --         --         --         --
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL DISTRIBUTIONS.......................    (.28)      (.17)      (.31)      (.21)      (.18)      (.25)      (.32)      (.34)
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.................  $10.94     $14.07     $10.71     $13.58      $7.29      $9.41      $8.29     $12.49
==================================================================================================================================
TOTAL RETURN*................................  (20.51)%    33.24%    (19.20)%    89.24%    (20.58)%    16.67%    (31.21)%    33.38%
==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)...........    $463       $648       $531       $613       $175       $178       $144       $223
Ratio of Expenses to Average Net Assets......    0.50%      0.60%      0.25%      0.26%      0.36%      0.35%      0.42%      0.45%
Ratio of Net Investment Income to Average Net
 Assets......................................    1.07%      1.38%      2.04%      2.04%      2.50%      2.54%      2.78%      3.01%
Portfolio Turnover Rate......................      19%         5%         4%        14%         2%         3%        10%        17%
Average Commission Rate Paid.................  $.0085        N/A        N/A        N/A        N/A        N/A        N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
 
<CAPTION>
 
                                                1989       1988
<S>                                           <C>         <C>       
- ----------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR...........   $9.35     $10.50
                                               ------     ------
INVESTMENT OPERATIONS
 Net Investment Income.......................     .27        .35
 Net Realized and Unrealized Gain (Loss) on
   Investments...............................     .29        .12
                                                -----      -----
   TOTAL FROM INVESTMENT OPERATIONS..........     .56        .47
- ----------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income.........................    (.26)      (.48)
 Distributions from Realized
   Capital Gains.............................      --      (1.14)
                                                -----      -----
   TOTAL DISTRIBUTIONS.......................    (.26)     (1.62)
- ----------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.................   $9.65      $9.35
================================================================
TOTAL RETURN*................................    6.14%      2.52%
================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)...........    $126       $128
Ratio of Expenses to Average Net Assets......    0.48%      0.47%
Ratio of Net Investment Income to Average Net
 Assets......................................    2.67%      2.71%
Portfolio Turnover Rate......................      18%        44%
Average Commission Rate Paid.................     N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
</TABLE>
    
   
<TABLE>
<CAPTION>
                                                 ---------------------------------------------------------------------------------
                                                                              HEALTH CARE PORTFOLIO
                                                 ---------------------------------------------------------------------------------
                                                                             YEAR ENDED JANUARY 31,
                                                 ---------------------------------------------------------------------------------
                                                1997       1996       1995       1994       1993       1992       1991       1990
<S>                                            <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR...........  $52.09     $37.01     $36.51     $32.66     $35.54     $27.32     $22.16     $19.46
                                                -----     ------     ------     ------     ------     ------     ------     ------
INVESTMENT OPERATIONS
 Net Investment Income.......................     .71        .61        .55        .79        .70        .53        .52        .48
 Net Realized and Unrealized Gain (Loss) on
   Investments...............................    9.88      16.06       2.83       5.79      (1.68)      8.75       6.03       3.43
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL FROM INVESTMENT OPERATIONS..........   10.59      16.67       3.38       6.58       (.98)      9.28       6.55       3.91
- ----------------------------------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income.........................    (.74)      (.57)      (.57)      (.76)      (.70)      (.53)      (.55)      (.49)
 Distributions from Realized
   Capital Gains.............................   (1.29)     (1.02)     (2.31)     (1.97)     (1.20)      (.53)      (.84)      (.72)
                                                -----      -----      -----      -----      -----      -----      -----      -----
   TOTAL DISTRIBUTIONS.......................   (2.03)     (1.59)     (2.88)     (2.73)     (1.90)     (1.06)     (1.39)     (1.21)
- ----------------------------------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.................  $60.65     $52.09     $37.01     $36.51     $32.66     $35.54     $27.32     $22.16
==================================================================================================================================
TOTAL RETURN*................................   20.65%     45.47%      9.79%     21.21%     (2.92)%    33.97%     30.09%     20.22%
==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)...........  $2,846     $1,654       $771       $638       $562       $553       $189        $76
Ratio of Expenses to Average Net Assets......    0.38%      0.46%+     0.40%      0.19%      0.22%      0.30%      0.36%      0.39%
Ratio of Net Investment Income to Average Net
 Assets......................................    1.41%      1.57%      1.58%      2.37%      2.06%      1.98%      2.54%      2.34%
Portfolio Turnover Rate......................       7%        13%        25%        19%        15%         7%        17%        28%
Average Commission Rate Paid.................  $.0504        N/A        N/A        N/A        N/A        N/A        N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
 +Effective in fiscal 1996, does not include reductions from directed brokerage arrangements. The 1996 Ratio of Expenses to
  Average Net Assets is .45% after including these reductions.
 
<CAPTION>
 
                                                1989       1988
<S>                                            <C>       <C>        
- ---------------------------------------------------------------------
NET ASSET VALUE, BEGINNING OF YEAR...........  $17.53     $19.53
                                                                    -
                                               ------     ------
INVESTMENT OPERATIONS
 Net Investment Income.......................     .36        .35
 Net Realized and Unrealized Gain (Loss) on
   Investments...............................    3.20       (.39)
                                                                    -
                                                -----      -----
   TOTAL FROM INVESTMENT OPERATIONS..........    3.56       (.04)
- ---------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net
   Investment Income.........................    (.34)      (.57)
 Distributions from Realized
   Capital Gains.............................   (1.29)     (1.39)
                                                                    -
                                                -----      -----
   TOTAL DISTRIBUTIONS.......................   (1.63)     (1.96)
- ---------------------------------------------------------------------
NET ASSET VALUE, END OF YEAR.................  $19.46     $17.53
=====================================================================
TOTAL RETURN*................................   21.43%      0.35%
=====================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Year (Millions)...........     $58        $54
Ratio of Expenses to Average Net Assets......    0.62%      0.51%
Ratio of Net Investment Income to Average Net
 Assets......................................    1.85%      1.65%
Portfolio Turnover Rate......................      19%        41%
Average Commission Rate Paid.................     N/A        N/A
 *Returns exclude 1% fee applied to shares redeemed or exchanged within one year of purchase.
 +Effective in fiscal 1996, does not include reductions from directed brokerage arrangements. The 1996 Ratio of Expenses to
  Average Net Assets is .45% after including these reductions
</TABLE>
    
 
                                        6
<PAGE>   9
 
   
YIELD AND
TOTAL RETURN          From time to time a Portfolio may advertise its yield and
                      total return. Both yield and total return figures are
                      based on historical earnings and are not intended to
                      indicate future performance. The "total return" of a
                      Portfolio refers to the average annual compounded rates of
                      return over one-, five- and ten-year periods or for the
                      life of the Portfolio (as stated in the advertisement)
                      that would equate an initial amount invested at the
                      beginning of a stated period to the ending redeemable
                      value of the investment, assuming the reinvestment of all
                      dividend and capital gains distributions.
    
 
                      In accordance with industry guidelines set forth by the
                      U.S. Securities and Exchange Commission, the "30-day
                      yield" of a Portfolio is calculated by dividing net
                      investment income per share earned during a 30-day period
                      by the net asset value per share on the last day of the
                      period. Net investment income includes interest and
                      dividend income earned on a Portfolio's securities; it is
                      net of all expenses and all recurring and nonrecurring
                      charges that have been applied to all shareholder
                      accounts. The yield calculation assumes that net
                      investment income earned over 30 days is compounded
                      monthly for six months and then annualized. Methods used
                      to calculate advertised yields are standardized for all
                      stock and bond mutual funds. However, these methods differ
                      from the accounting methods used by a Portfolio to
                      maintain its books and records, and so the advertised
                      30-day yield may not fully reflect the income paid to an
                      investor's account or the yield reported in a Portfolio's
                      financial statements.
 
                      Also, the Portfolios may compare their performance to that
                      of various stock market indices, including the Standard &
                      Poor's 500 Index.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
OBJECTIVES
THE PORTFOLIOS SEEK
TO PROVIDE LONG-TERM
GROWTH                The Fund is an open-end diversified investment company.
                      The Portfolios invest primarily in common stocks and other
                      equity securities concentrated in a particular industry or
                      group of related industries.
    
 
   
                      The Energy, Gold & Precious Metals, and Health Care
                      Portfolios seek to provide long-term capital appreciation.
                      Although these three Portfolios may generate dividend
                      income to a limited extent, current income will be
                      secondary to these Portfolios' primary objective of
                      achieving capital appreciation.
    
 
                      There is no assurance that any Portfolio will achieve its
                      stated objective.
 
                      The investment objective of each Portfolio is fundamental
                      and so cannot be changed without the approval of a
                      majority of a Portfolio's shareholders.
- --------------------------------------------------------------------------------
 
INVESTMENT
POLICIES
EACH PORTFOLIO
CONCENTRATES ITS
INVESTMENTS IN A
PARTICULAR INDUSTRY   Under normal circumstances, the Energy, Gold & Precious
                      Metals, and Health Care Portfolios will each invest at
                      least 80% of their net assets in the equity securities
                      (common stocks and securities convertible into common
                      stocks) of companies in a particular industry or group of
                      related industries. The Gold & Precious Metals Portfolio
                      may also invest up to 20% of its assets in gold or other
                      precious metal bullion and coins. A security will
                      generally be considered appropriate for a given Portfolio
                      if, as determined by the investment adviser, at least 50%
                      of the company's assets, revenues or net income are
                      related to or derived from the
 
                                        7
<PAGE>   10
 
   
                      industry or industries designated for the Portfolio. The
                      Fund is managed without regard to tax ramifications.
    
 
   
                      The Energy and Health Care Portfolios of the Fund will
                      invest primarily in securities that trade in U.S. markets.
                      However, both of these Portfolios may invest up to 30% of
                      their assets in foreign securities. The Gold & Precious
                      Metals Portfolio may invest up to 100% of its assets in
                      foreign securities, in order to protect against
                      fluctuations in foreign exchange rates, each Portfolio may
                      invest in forward foreign currency exchange contracts.
    
 
                      Besides investing primarily in equity securities, each
                      Portfolio may hold certain short-term fixed income
                      securities as cash reserves. Each Portfolio may also
                      invest in stock futures contracts and options to a limited
                      extent. See "Implementation of Policies" for a description
                      of these and other investment practices of the Fund.
 
   
                      The specific investment policies of the three Portfolios
                      are listed below:
    
 
                      The ENERGY PORTFOLIO invests in the equity securities of
                      companies engaged in the following energy-related
                      activities: the production, transmission, marketing,
                      control or measurement of energy or energy fuels; the
                      making of component products for such activities; energy
                      research or experimentation; and activities related to
                      energy conservation and pollution control. Such activities
                      may involve newer sources of energy, such as geothermal,
                      nuclear and solar power, as well as more traditional
                      sources of energy, such as oil, natural gas and coal. As
                      new sources of energy are developed and current methods of
                      exploiting and developing energy are advanced, then
                      companies in these new areas will also be considered for
                      the Energy Portfolio. The Portfolio, however, will not
                      purchase the securities of electric utility companies,
                      although it may invest in natural gas distributors and
                      natural gas pipeline concerns.
 
                      The GOLD & PRECIOUS METALS PORTFOLIO invests in the equity
                      securities of foreign and domestic companies engaged in
                      the exploration, mining, fabrication, processing, or
                      marketing and distribution of gold, silver, platinum,
                      diamonds or other precious and rare metals and minerals.
                      The Portfolio may also invest up to 20% of its assets
                      directly in gold, silver or other precious metal bullion
                      and coins.
 
                      Bullion and coins for the Gold & Precious Metals Portfolio
                      will only be bought from and sold to banks (both U.S. and
                      foreign), and dealers who are members of, or affiliated
                      with members of, a regulated U.S. commodities exchange, in
                      accordance with applicable investment laws. Gold, silver
                      or other precious metal bullion will not be purchased in
                      any form that is not readily marketable. Coins will not be
                      purchased for their numismatic value and will not be
                      considered for the Portfolio if they cannot be bought or
                      sold in an active market. Any bullion or coins purchased
                      by the Portfolio will be delivered to and stored with a
                      qualified custodian bank in the U.S.
 
                      Investors should be aware that bullion and coins do not
                      generate income, offering only the potential for capital
                      appreciation or depreciation, and may subject the
                      Portfolio to higher custody and transactions costs than
                      those normally associated
 
                                        8
<PAGE>   11
 
                      with the ownership of securities. Investments relating to
                      gold and other precious metals or minerals are considered
                      speculative. See "Investment Risks."
 
                      The HEALTH CARE PORTFOLIO invests in securities of
                      companies engaged in the development, production or
                      distribution of products and services related to the
                      treatment or prevention of diseases and other medical
                      infirmities. Companies in these fields include, but are
                      not limited to, pharmaceutical firms; companies that
                      design, manufacture or sell medical supplies, equipment
                      and support services; and companies that operate hospitals
                      and other health care facilities. The Portfolio will also
                      consider companies engaged in medical, diagnostic,
                      biochemical, and biotechnological research and
                      development.
 
   
                                            *      *      *
                      The Fund is responsible for voting the shares of all
                      securities it holds.
    
 
                      The investment policies of the Fund are not fundamental
                      and so may be changed by the Board of Directors without
                      shareholder approval. However, shareholders would be
                      notified prior to a material change in either.
- --------------------------------------------------------------------------------
 
INVESTMENT
RISKS
EACH PORTFOLIO IS
SUBJECT TO MARKET AND
INDUSTRY RISK         As mutual funds specializing in specific industries or
                      groups of industries, the Portfolios of the Fund are
                      subject primarily to two types of risk: market risk and
                      industry risk. Since the Portfolios may invest in foreign
                      securities, investors are also exposed to currency risk
                      and other risks of international investing.
 
   
                      MARKET RISK is the possibility that stock prices in
                      general will decline over short or even extended periods.
                      The stock market tends to be cyclical, with periods when
                      stock prices generally rise and periods when stock prices
                      generally decline. Stocks have provided annual total
                      returns (capital appreciation plus dividend income)
                      averaging +10.8% for all 10-year periods from 1926 to
                      1996, as measured by the Standard & Poor's 500 Composite
                      Stock Price Index. In contrast, the return on stocks in
                      individual years has varied from a low of -43.3% to a high
                      of +53.9%, reflecting the short-term volatility of stock
                      prices.
    
 
   
                      These fluctuations in stock market prices are expected to
                      have a substantial influence on the value of each
                      Portfolio. Moreover, the Energy, Gold & Precious Metals,
                      and Health Care Portfolios are likely to exhibit greater
                      volatility than the broad stock market, largely as a
                      result of their industry-specific holdings and, in several
                      of the Portfolios, an emphasis on the stocks of smaller
                      companies.
    
 
                      In addition to stock market risk, each Portfolio is
                      subject to INDUSTRY RISK -- i.e., the possibility that a
                      particular group of related stocks will decline in price
                      due to industry-specific developments. The special
                      industry risks of the Energy Portfolio are that earnings
                      and dividends of companies in the energy industry are
                      greatly affected by changes in the prices and supplies of
                      oil and other energy fuels. Prices and supplies can
                      fluctuate significantly over a short period due to changes
                      in international politics, policies of the Organization of
                      Petroleum Exporting Countries (OPEC), relationships among
                      OPEC members and between OPEC and oil-importing nations,
                      energy conser-
 
                                        9
<PAGE>   12
 
                      vation, the regulatory environment, governmental tax
                      policies, and the economic growth and stability of the
                      main energy-consuming countries.
 
                      The industry risks of the Gold & Precious Metals Portfolio
                      include the sharp price volatility of gold and other
                      precious metals and of mining company shares. Investments
                      related to gold or other precious metals or minerals are
                      considered speculative and are affected by a host of
                      worldwide economic, financial and political factors.
                      Prices of gold and other precious metals may fluctuate
                      sharply over short periods due to several factors: changes
                      in inflation or expectations regarding inflation in
                      various countries; currency fluctuations; metal sales by
                      governments, central banks or international agencies;
                      investment speculation; changes in industrial and
                      commercial demand; and governmental prohibitions or
                      restrictions on the private ownership of certain precious
                      metals or minerals.
 
   
                      Political and economic conditions in gold-producing
                      countries may also have a direct effect on the mining and
                      distribution of gold and, consequently, its price. At
                      present, there are only five major producers of gold
                      bullion. In order of magnitude, they are: South Africa,
                      the United States, Australia, Canada, and Russia.
    
 
   
                      Events in South Africa are of particular importance since
                      the Portfolio intends to invest a substantial portion of
                      its assets in securities of South African mining companies
                      (25% of the Portfolio's net assets as of January 31,
                      1997). In South Africa, the activities of gold-mining
                      companies are subject to policies promulgated by the
                      Ministry of Mines. The Reserve Bank of South Africa, as
                      the sole authorized agent for South African gold,
                      influences the price and timing of sales of South African
                      gold. The South African government has also from time to
                      time imposed restrictions on the flow of international
                      capital.
    
 
                      Political and social problems in South Africa may also
                      pose certain risks to the Portfolio's investments in South
                      African issuers. These include the effect of social and
                      political unrest on mining production and gold prices, as
                      well as the threat of nationalization or expropriation by
                      the government of South Africa.
 
   
                      The special industry risks of the Health Care Portfolio
                      are that the economic prospects of health care companies
                      can fluctuate dramatically due to changes in the
                      regulatory and competitive environment. A substantial
                      portion of health care services are funded or subsidized
                      by the government, and so changes in governmental policies
                      at the federal or state level may affect the demand for
                      health care products and services. Regulatory approvals,
                      which often entail lengthy application and testing
                      procedures, are generally required before new drugs and
                      certain medical instrumentation may be introduced. Health
                      care companies may face lawsuits related to product
                      liability issues. Also, many products and services
                      provided by health care companies are subject to rapid
                      obsolescence.
    
 
   
THE PORTFOLIOS
ARE SUBJECT TO
MANAGER RISK          The investment advisers for the Portfolios manage each
                      Portfolio according to the traditional methods of "active"
                      investment management, which involve the buying and
                      selling of securities based upon economic, financial and
                      market analysis and investment judgment. MANAGER RISK
                      refers to the possibility that each Portfolio's
    
 
                                       10
<PAGE>   13
 
                      investment adviser may fail to execute the Portfolio's
                      investment strategy effectively. As a result, each of the
                      Portfolios may fail to achieve its stated objective.
 
FOREIGN SECURITIES
ENTAIL CURRENCY AND
OTHER RISKS           Since each Portfolio may invest in foreign securities,
                      investors in the Fund are also exposed to the unique risks
                      of international investing. For U.S. investors, the
                      returns of foreign securities are influenced by not only
                      the returns on foreign common stocks themselves, but also
                      by CURRENCY RISK -- i.e., changes in the value of the
                      currencies in which the stocks are denominated. In a
                      period when the U.S. dollar rises against foreign
                      currencies, the returns on foreign stocks for a U.S.
                      investor are diminished. By contrast, in a period when the
                      U.S. dollar declines, the returns on foreign stocks are
                      enhanced.
 
                      Other risks and considerations of international investing
                      include the following: differences in accounting, auditing
                      and financial reporting standards; generally higher
                      commission rates on foreign portfolio transactions; the
                      smaller trading volumes and generally lower liquidity of
                      foreign stock markets, which may result in greater price
                      volatility; foreign withholding taxes payable on a
                      Portfolio's foreign securities, which may reduce dividend
                      income payable to shareholders; the possibility of
                      expropriation or confiscatory taxation; adverse changes in
                      investment or exchange control regulations; political
                      instability which could affect U.S. investment in foreign
                      countries; difficulty in obtaining and enforcing foreign
                      court judgements; and potential restrictions on the flow
                      of international capital.
- --------------------------------------------------------------------------------
 
WHO SHOULD
INVEST                The Fund is designed for investors who are seeking the
                      potential rewards, and who are willing to accept the risks
                      associated with equity investments concentrated in
                      specific industries. Because of the risks associated with
                      common stock and bond investments, the Fund is intended to
                      be a long-term investment vehicle and is not designed to
                      provide investors with a means of speculating on
                      short-term stock and bond market movements. Investors who
                      engage in excessive account activity generate additional
                      costs which are borne by all of the Fund's shareholders.
                      In order to minimize such costs the Fund has adopted the
                      following policies. The Fund reserves the right to reject
                      any purchase request (including exchange purchases from
                      other Vanguard portfolios) that is reasonably deemed to be
                      disruptive to efficient portfolio management, either
                      because of the timing of the investment or previous
                      excessive trading by the investor. Additionally, the Fund
                      has adopted exchange privilege limitations as described in
                      the section "Exchange Privilege Limitations." Finally, the
                      Fund reserves the right to suspend the offering of its
                      shares.
 
   
                      The Energy, Gold & Precious Metals, and Health Care
                      Portfolios are intended for investors with substantial
                      financial resources who have the perspective and patience
                      to assume above-average interim investment risks in
                      pursuit of long-term capital growth. Since many of the
                      securities owned by these three Portfolios may be
                      considered speculative in nature or unseasoned by
                      traditional investment standards, substantially
                      greater-than-average investment risk is involved. The
                      share prices of these three Portfolios are expected to be
                      volatile.
    
 
   
                      There can be no assurance that a Portfolio will achieve
                      its stated objective. Shareholders will be exposed to the
                      substantial risks inherent in equity investing.
    
 
                                       11
<PAGE>   14
 
                      Investors may wish to reduce the potential risk of
                      investing in a Portfolio by purchasing shares on a
                      periodic basis (dollar-cost averaging) rather than
                      investing in one lump sum.
 
                      Since each Portfolio concentrates its holdings in a
                      particular industry or group of industries, the Fund
                      should not be considered a complete investment program.
                      Most investors should maintain diversified holdings of
                      securities with different risk
                      characteristics -- including common stocks, bonds and
                      money market instruments.
- --------------------------------------------------------------------------------
 
IMPLEMENTATION
OF POLICIES

EACH PORTFOLIO MAY
HOLD FOREIGN SECURITIES
                      Each Portfolio follows a number of investment practices in
                      an effort to achieve its objective of long-term capital
                      growth.
 
   
                      Each Portfolio may invest up to 30% of its assets, and the
                      Gold & Precious Metals Portfolio may invest up to 100% of
                      its assets, in foreign securities. Such a policy expands
                      the investment opportunities available to the Portfolios
                      and may result in improved diversification and
                      performance.
    
 
                      All or a portion of the foreign securities purchased by a
                      Portfolio may be in the form of American Depository
                      Receipts (ADRs) or European Depository Receipts (EDRs).
                      ADRs are receipts typically issued by a U.S. bank or trust
                      company that evidence ownership of underlying securities
                      issued by a foreign corporation. EDRs are receipts issued
                      in Europe that evidence a similar ownership arrangement.
                      Generally, ADRs are designed for trading in the United
                      States securities markets and EDRs are designed for
                      trading in European securities markets.
 
EACH PORTFOLIO MAY
ENTER INTO FORWARD
CURRENCY CONTRACTS    Each Portfolio of the Fund may enter into forward foreign
                      currency exchange contracts in order to protect against
                      uncertainty in the level of future foreign exchange rates
                      in the purchase and sale of investment securities. A
                      Portfolio may not enter into such contracts for
                      speculative purposes.
 
                      A forward foreign currency exchange contract is an
                      obligation to purchase or sell a specific currency at a
                      future date, which may be any fixed number of days from
                      the date of the contract agreed upon by the parties, at a
                      price set at the time of the contract. These contracts may
                      be bought or sold to protect a Portfolio to a limited
                      extent against adverse changes in exchange rates between
                      foreign currencies and the U.S. dollar. Such contracts,
                      which protect the value of a Portfolio's investment
                      securities against a decline in the value of a currency,
                      do not eliminate fluctuations in the underlying prices of
                      the securities. They simply establish an exchange rate at
                      a future date. Also, although such contracts tend to
                      minimize the risk of loss due to a decline in the value of
                      the hedged currency, at the same time they tend to limit
                      any potential gain that might be realized should the value
                      of such currency increase.
 
   
EACH PORTFOLIO MAY
INVEST IN SHORT-TERM
FIXED-INCOME
SECURITIES            Although they normally seek to remain substantially fully
                      invested in equity securities, the Portfolios of the Fund
                      may invest temporarily in certain short-term fixed income
                      securities. Such securities may be used to invest
                      uncommitted cash balances, to maintain liquidity to meet
                      shareholder redemptions, or to take a temporary defensive
                      position against potential stock market declines. These
                      securities include: obligations of the United States
                      Government and its agencies or
    
 
                                       12
<PAGE>   15
 
                      instrumentalities; commercial paper, bank certificates of
                      deposit, and bankers' acceptances; and repurchase
                      agreements collateralized by these securities.
 
                      The use of repurchase agreements involves certain risks,
                      including the risk of losses caused by the default or
                      insolvency of the other party to the agreement. However,
                      each Portfolio expects that it can control this risk
                      through careful evaluation of the creditworthiness of the
                      other party to any repurchase agreement and careful
                      monitoring procedures.
 
   
DERIVATIVE INVESTING  Derivatives are instruments whose values are linked to or
                      derived from an underlying security or index. The most
                      common and conventional types of derivative securities are
                      futures and options.
    
 
THE FUND MAY INVEST
IN DERIVATIVE
SECURITIES            The Fund may invest in futures contracts and options, but
                      only to a limited extent. Specifically, a Portfolio of the
                      Fund may enter into futures contracts provided that not
                      more than 5% of its assets are required as a futures
                      contract deposit; in addition, a Portfolio may enter into
                      futures contracts and options transactions only to the
                      extent that obligations under such contracts or
                      transactions represent not more than 20% of the
                      Portfolio's assets.
 
                      Futures contracts and options may be used for several
                      common fund management strategies: to maintain cash
                      reserves while simulating full investment, to facilitate
                      trading, to reduce transaction costs, or to seek higher
                      investment returns when a specific futures contract is
                      priced more attractively than other futures contracts or
                      the underlying security or index.
 
                      The Portfolios may use futures contracts for bona fide
                      "hedging" purposes. In executing a hedge, a manager sells,
                      for example, stock index futures to protect against a
                      decline in the stock market. As such, if the market drops,
                      the value of the futures position will rise, thereby
                      offsetting the decline in value of the Portfolio's stock
                      holdings.
 
FUTURES CONTRACTS
AND OPTIONS POSE
CERTAIN RISKS         The primary risks associated with the use of futures
                      contracts and options are: (i) imperfect correlation
                      between the change in market value of the stocks held by a
                      Portfolio and the prices of futures contracts and options;
                      and (ii) possible lack of a liquid secondary market for a
                      futures contract and the resulting inability to close a
                      futures position prior to its maturity date. The risk of
                      imperfect correlation will be minimized by investing in
                      those contracts whose price fluctuations are expected to
                      resemble those of the Portfolio's underlying securities.
                      The risk that a Portfolio will be unable to close out a
                      futures position will be minimized by entering into such
                      transactions on a national exchange with an active and
                      liquid secondary market.
 
                      The risk of loss in trading futures contracts in some
                      strategies can be substantial due both to the low margin
                      deposits required and the extremely high degree of
                      leveraging involved in futures pricing. As a result, a
                      relatively small price movement in a futures contract may
                      result in immediate and substantial loss or gain. However,
                      a Portfolio will not use futures contracts or options for
                      speculative purposes.
 
EACH PORTFOLIO MAY
LEND ITS SECURITIES   Each Portfolio may lend its securities on a short-term or
                      long-term basis to qualified institutional investors for
                      the purpose of realizing additional income. With any loan
 
                                       13
<PAGE>   16
 
                      of portfolio securities, there is a risk that the
                      borrowing institution will fail to redeliver the
                      securities when due. However, loans of securities by a
                      Portfolio will be collateralized by cash, letters of
                      credit, or securities issued or guaranteed by the U.S.
                      Government or its agencies. The collateral will equal at
                      least 100% of the current market value of the loaned
                      securities.
 
EACH PORTFOLIO MAY
BORROW MONEY          Each Portfolio may borrow money, subject to the limits set
                      forth below, for temporary or emergency purposes,
                      including the meeting of redemption requests which might
                      otherwise require the untimely disposition of securities.
 
PORTFOLIO TURNOVER IS
NOT EXPECTED TO EXCEED
100%                  Although they generally seek to invest for the long term,
                      the Portfolios of the Fund retain the right to sell
                      securities irrespective of how long they have been held.
                      It is anticipated that the annual portfolio turnover of
                      each Portfolio will not exceed 100%. A turnover rate of
                      100% would occur, for example, if all the securities of a
                      Portfolio were replaced within one year.
- --------------------------------------------------------------------------------

INVESTMENT            Each Portfolio has adopted certain limitations designed to
LIMITATIONS           reduce its exposure to specific situations. Some of these
                      limitations are that a Portfolio will not:
 
   
THE FUND HAS ADOPTED  (a) with respect to 75% of the value of its total assets,
CERTAIN FUNDAMENTAL       invest more than 5% of its assets in the securities of
LIMITATIONS               any single company or purchase more than 10% of the
                          voting securities of any issuer(except for securities
                          issued or guaranteed by the U.S. Government or any of
                          its agencies or instrumentalities).
    
   
                      (b) borrow money, except from banks (or through reverse
                          repurchase agreements) for temporary or emergency (not
                          leveraging) purposes, and then not in an amount
                          exceeding 15% of the value of the Fund's net assets at
                          the time the borrowing is made. Whenever borrowing
                          exceeds 5% of the value of the Fund's net assets, the
                          Fund will not make any additional investments;
    
   
                      (c) purchase or otherwise acquire any security if, as a
                          result, more than 15% of its net assets would be
                          invested in securities that are illiquid; and
    
   
                      (d) make loans except (i) by purchasing bonds, debentures
                          or similar obligations (including repurchase
                          agreements) which are either publicly distributed or
                          customarily purchased by institutional investors, and
                          (ii) by lending its securities to banks, brokers,
                          dealers and other financial institutions so long as
                          such loans are not inconsistent with the Investment
                          Company Act or the Rules and Regulations or
                          interpretations of the Commission thereunder and the
                          aggregate value of all securities loaned does not
                          exceed 33 1/3% of the market value of the Portfolio's
                          total assets.
    
 
                      These investment limitations are considered at the time
                      investment securities are purchased. The limitations
                      described here and in the Statement of Additional
                      Information are fundamental and so may be changed only
                      with the approval of a majority of the Fund's
                      shareholders.
- --------------------------------------------------------------------------------
 
                                       14
<PAGE>   17
 
   
MANAGEMENT OF
THE FUND

VANGUARD ADMINISTERS
AND DISTRIBUTES THE
FUND                  The Fund is a member of The Vanguard Group of Investment
                      Companies, a family of more than 30 investment companies
                      with more than 90 distinct investment portfolios and total
                      assets in excess of $250 billion. Through their
                      jointly-owned subsidiary, The Vanguard Group, Inc.
                      ("Vanguard"), the Fund and the other funds in the Group
                      obtain at cost virtually all of their corporate
                      management, administrative and distribution services.
                      Vanguard also provides investment advisory services on an
                      at-cost basis to certain Vanguard funds. As a result of
                      Vanguard's unique corporate structure, the Vanguard funds
                      have costs substantially lower than those of most
                      competing mutual funds. In 1996, the average expense ratio
                      (annual costs including advisory fees divided by total net
                      assets) for the Vanguard funds amounted to approximately
                      .29% compared to an average of 1.22% for the mutual fund
                      industry (data provided by Lipper Analytical Services).
    
 
                      The Officers of the Fund manage its day-to-day operations
                      and are responsible to the Fund's Board of Directors. The
                      Directors set broad policies for the Fund and choose its
                      Officers. A list of the Directors and Officers of the Fund
                      and a statement of their present positions and principal
                      occupations during the past five years can be found in the
                      Statement of Additional Information.
 
                      Vanguard employs a supporting staff of management and
                      administrative personnel needed to provide the requisite
                      services to the funds and also furnishes the funds with
                      necessary office space, furnishings and equipment. Each
                      fund pays its share of Vanguard's net expenses, which are
                      allocated among the funds under methods approved by the
                      Board of Directors (Trustees) of each fund. In addition,
                      each fund bears its own direct expenses, such as legal,
                      auditing and custodian fees.
 
                      Vanguard provides distribution and marketing services to
                      the funds. The funds are available on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
                      However, each fund bears its share of the Group's
                      distribution costs.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
ADVISERS              The Portfolios employ two external investment advisers.
                      Wellington Management Company, LLP serves as investment
                      adviser to the Energy and Health Care Portfolios of the
                      Fund. M&G Investment Management Limited serves as
                      investment adviser to the Gold & Precious Metals
                      Portfolio.
    
 
   
WELLINGTON
MANAGEMENT COMPANY,
LLP MANAGES
INVESTMENTS FOR THREE
PORTFOLIOS            Under an investment advisory agreement with the Fund,
                      Wellington Management Company, LLP ("WMC"), 75 State
                      Street, Boston, MA 02109, manages the investment and
                      reinvestment of the assets of the Fund's Energy and Health
                      Care Portfolios and continuously reviews, supervises and
                      administers each Portfolio's investment program. WMC
                      discharges its responsibilities subject to the control of
                      the Officers and Directors of the Fund.
    
 
   
                      WMC is a professional investment advisory firm which
                      globally provides services to investment companies,
                      institutions and individuals. Among the clients of WMC are
                      more than 10 of the investment companies of The Vanguard
                      Group. As of January 31, 1997, WMC held discretionary
                      management authority with respect to more than $133
                      billion of assets. WMC and its predecessor organizations
                      have
    
 
                                       15
<PAGE>   18
 
                      provided investment advisory services to investment
                      companies since 1933 and to investment counseling clients
                      since 1960.
 
   
                      Ernst H. von Metzsch, Senior Vice President of WMC, serves
                      as the portfolio manager of the Energy Portfolio. Mr. von
                      Metzsch has been an investment professional with WMC since
                      1973. Edward P. Owens, Senior Vice President of WMC,
                      serves as portfolio manager of the Health Care Portfolio.
                      Mr. Owens has been an investment professional with WMC
                      since 1974. Messrs. von Metzsch and Owens have served as
                      portfolio managers of the Energy and Health Care
                      Portfolios, respectively, since the Fund's inception in
                      May 1984. WMC's portfolio managers are supported by
                      research and other investment services provided by the
                      professional staff of WMC.
    
 
   
                      Under the investment advisory agreement, the two
                      Portfolios and the Fund's Utilities Income Portfolio,
                      which is also advised by WMC, are required to pay WMC an
                      aggregate fee at the end of the fiscal quarter, calculated
                      by applying the following annual percentage rates to the
                      average month-end net assets for the quarter of these
                      three Portfolios:
    
 
   
<TABLE>
<CAPTION>
                                          NET ASSETS                          RATE
                                      -------------------                   -------
                                      <S>                                   <C>
                                      First $500 million                     0.150%
                                      Next $500 million                      0.125%
                                      Next $1 billion                        0.100%
                                      Next $1 billion                        0.075%
                                      Over $3 billion                        0.050%
</TABLE>
    
 
   
                      In addition, once the advisory fee to WMC is calculated
                      for the three Portfolios under this schedule, the total
                      fee will be reduced in order that the advisory fee paid by
                      the Utilities Income Portfolio does not exceed 0.08%.
    
 
   
                      The advisory fee is based on the total assets for the
                      three Portfolios and is allocated, except as noted above,
                      to each Portfolio based on the net assets of each. For the
                      fiscal year ended January 31, 1997, the investment
                      advisory fee represented an effective annual rate of .10
                      of 1% of average net assets for the Energy and Health Care
                      Portfolios. These fees were paid pursuant to the terms of
                      a previous investment advisory agreement, which called for
                      a higher rate of fees.
    
 
M&G INVESTMENT
MANAGEMENT LTD.
MANAGES THE GOLD &
PRECIOUS METALS
PORTFOLIO             The Fund has also entered into an investment advisory
                      agreement with M&G Investment Management Limited ("M&G"),
                      3 Minster Court, Great Tower Street, London, England EC3R
                      7XH. Under that investment advisory agreement, M&G manages
                      the investment and reinvestment of the assets of the
                      Fund's Gold & Precious Metals Portfolio and continuously
                      reviews, supervises and administers the Portfolio's
                      investment program. M&G discharges its responsibilities
                      subject to the control of the Officers and Directors of
                      the Fund.
 
                      M&G is a wholly-owned subsidiary of the M&G Group Plc and
                      is authorized to carry on investment business under
                      English law by the Investment Management Regulatory
                      Organisation Limited. The M&G Group, an independent group
                      of companies, began providing investment advisory services
                      to the public over 50 years ago, when they launched Great
                      Britain's first unit trust (mutual fund). Today, the
                      principal
 
                                       16
<PAGE>   19
 
   
                      operating subsidiaries of the M&G Group manage funds for
                      over 140 accounts, including individual investors, company
                      pension plans and charitable foundations. In total, the
                      M&G Group manages or advises over $30 billion in assets.
                      Among these assets are two unit trusts that invest in the
                      securities of gold and precious metals-related companies.
                      Graham E. French, an Investment Manager of M&G and
                      assistant portfolio manager of the Gold & Precious Metals
                      Portfolio since 1991, was named portfolio manager of the
                      Portfolio in December 1996. Mr. French took over
                      responsibility for the Portfolio from David J. Hutchins,
                      who had managed the Portfolio since January, 1987.
    
 
   
                      Under the investment advisory agreement dated December 1,
                      1996, the Gold & Precious Metals Portfolio pays M&G a fee
                      at the end of each fiscal quarter, calculated by applying
                      the following annual percentage rates to the average
                      month-end net assets of the Portfolio for the quarter:
    
 
   
<TABLE>
<CAPTION>
                                          NET ASSETS                           RATE
                                      -------------------                      -----
                                      <S>                                     <C>
                                      First $100 million                       .30%
                                      Next $150 million                        .20%
                                      Next $250 million                        .15%
                                      Over $500 million                        .10%
</TABLE>
    
 
   
                      For the fiscal year ended January 31, 1997, the investment
                      advisory fee paid by the Gold & Precious Metals Portfolio
                      represented an effective annual rate of .18 of 1% of
                      average net assets after giving effect to a fee waiver of
                      $310,000 (.05 of 1%).
    
 
                      The investment advisory agreements with WMC and M&G
                      authorize the advisers to select brokers or dealers to
                      execute purchases and sales of the Fund's portfolio
                      securities, and direct the advisers to use their best
                      efforts to obtain the best available price and most
                      favorable execution with respect to all transactions. The
                      full range and quality of brokerage services are
                      considered in making these determinations.
 
   
                      The Fund has authorized WMC and M&G to pay higher
                      commissions in recognition of brokerage services felt
                      necessary for the achievement of better execution,
                      provided the advisers believe this to be in the best
                      interest of the Fund.
    
 
   
                      In placing portfolio transactions, each adviser of the
                      Fund uses its best judgment to choose the broker most
                      capable of providing the brokerage services necessary to
                      obtain the best available price and most favorable
                      execution at the lowest commission rate. The full range
                      and quality of brokerage services available are considered
                      in making these determinations. In those instances where
                      it is reasonably determined that more than one broker can
                      offer the services needed to obtain the best available
                      price and most favorable execution, consideration may be
                      given to those brokers which supply statistical
                      information and provide other services in addition to
                      execution services to the Portfolios. However, the
                      advisers may not pay higher commissions specifically for
                      the purpose of obtaining other services. The Portfolios
                      may direct the advisers to use a particular broker for
                      certain transactions in exchange for commission rebates or
                      research services provided to the Portfolios.
    
 
                                       17
<PAGE>   20
 
                      The Fund's Board of Directors may, without the approval of
                      shareholders, provide for: (a) the employment of a new
                      investment adviser pursuant to the terms of a new advisory
                      agreement, either as a replacement for an existing adviser
                      or as an additional adviser; (b) a change in the terms of
                      an advisory agreement; and (c) the continued employment of
                      an existing adviser on the same advisory contract terms
                      where a contract has been assigned because of a change in
                      control of the adviser. Any such change will only be made
                      upon not less than 30 days' prior written notice to
                      shareholders of the Fund which shall include substantially
                      the information concerning the adviser that would have
                      normally been included in a proxy statement.
- --------------------------------------------------------------------------------
 
   
DIVIDENDS,
CAPITAL GAINS
AND TAXES

THE THREE PORTFOLIOS
PAY DIVIDENDS
ANNUALLY              The Energy, Gold & Precious Metals, and Health Care
                      Portfolios pay dividends annually. Capital gains
                      distributions for all Portfolios, if any, are also made
                      annually.
    
 
                      Dividend and capital gains distributions may be
                      automatically reinvested or received in cash. See
                      "Choosing a Distribution Option" for a description of
                      these distribution methods.
 
                      In order to satisfy certain distribution requirements of
                      the Tax Reform Act of 1986, each Portfolio may declare
                      year-end dividend and capital gains distributions during
                      December. Such distributions, if received by shareholders
                      by January 31, are deemed to have been paid by the
                      Portfolio and received by shareholders on December 31 of
                      the prior year.
 
                      Each Portfolio of the Fund intends to continue to qualify
                      for taxation as a "regulated investment company" under the
                      Internal Revenue Code so that each Portfolio will not be
                      subject to federal income tax to the extent its income is
                      distributed to shareholders. Dividends paid by a Portfolio
                      from net investment income, whether received in cash or
                      reinvested in additional shares, will be taxable to
                      shareholders as ordinary income. For corporate investors,
                      dividends from net investment income will generally
                      qualify in part for the intercorporate dividends-received
                      deduction. However, the portion of the dividends so
                      qualified depends on the aggregate taxable qualifying
                      dividend income received by the Portfolio from domestic
                      (U.S.) sources.
 
                      Distributions paid by a Portfolio from long-term capital
                      gains, whether received in cash or reinvested in
                      additional shares, are taxable as long-term capital gains,
                      regardless of the length of time you have owned shares in
                      the Portfolio. Capital gains distributions are made when a
                      Portfolio realizes net capital gains on sales of portfolio
                      securities during the year. A Portfolio does not seek to
                      realize any particular amount of capital gains during a
                      year; rather, realized gains are a by-product of portfolio
                      management activities. Consequently, capital gains
                      distributions may be expected to vary considerably from
                      year to year; there will be no capital gains distributions
                      in years when a Portfolio realizes net capital losses.
 
                      Note that if you accept capital gains distributions in
                      cash, instead of reinvesting them in additional shares,
                      you are in effect reducing the capital at work for you in
                      a Portfolio. Also, keep in mind that if you purchase
                      shares in a Portfolio shortly before the record date for a
                      dividend or capital gains distribution, a portion of your
                      investment will be returned to you as a taxable
                      distribution, regardless of whether you are reinvesting
                      your distributions or receiving them in cash.
 
                                       18
<PAGE>   21
 
                      The Fund will notify you annually as to the tax status of
                      dividend and capital gains distributions paid by a
                      Portfolio.
 
THE GOLD & PRECIOUS
METALS PORTFOLIO MAY
"PASS THROUGH"
FOREIGN TAXES         The Gold & Precious Metals Portfolio may elect to "pass
                      through" to the Portfolio's shareholders the amount of
                      foreign income taxes paid by the Portfolio. The
                      Portfolio will make such an election only if it deems it
                      to be in the best interests of its shareholders.
 
                      If this election is made, shareholders of the Gold &
                      Precious Metals Portfolio will be required to include in
                      their gross income their pro rata share of foreign taxes
                      paid by the Portfolio. However, shareholders will be able
                      to treat their pro rata share of foreign taxes as either
                      an itemized deduction or a foreign tax credit against U.S.
                      income taxes on their tax return.
 
A CAPITAL GAIN OR LOSS
MAY BE REALIZED
UPON EXCHANGE OR
REDEMPTION            A sale of shares of a Portfolio of the Fund is a taxable
                      event and may result in a capital gain or loss. A capital
                      gain or loss may be realized from an ordinary redemption
                      of shares or an exchange of shares between two mutual
                      funds (or two portfolios of a mutual fund).
 
                      Dividend distributions, capital gains distributions, and
                      capital gains or losses from redemptions and exchanges may
                      be subject to state and local taxes.
 
                      The Fund is required to withhold 31% of taxable dividends,
                      capital gains distributions, and redemptions paid to
                      shareholders who have not complied with IRS taxpayer
                      identification regulations. You may avoid this withholding
                      requirement by certifying on your Account Registration
                      Form your proper Social Security or Employer
                      Identification number and by certifying that you are not
                      subject to backup withholding.
 
                      The Fund has obtained a Certificate of Authority to do
                      business as a foreign corporation in Pennsylvania and does
                      business and maintains an office in that state. In the
                      opinion of counsel, the shares of the Fund are exempt from
                      Pennsylvania personal property taxes.
 
                      The tax discussion set forth above is included for general
                      information only. Prospective investors should consult
                      their own tax advisers concerning the tax consequences of
                      an investment in the Fund.
- --------------------------------------------------------------------------------
 
   
THE SHARE PRICE OF
EACH PORTFOLIO        Each Portfolio's share price or "net asset value" per
                      share is calculated by dividing the total assets of the
                      Portfolio, less all liabilities, by the total number of
                      shares outstanding. The net asset value is determined as
                      of the close of the New York Stock Exchange (generally
                      4:00 p.m. Eastern time) on each day that the Exchange is
                      open for trading.
    
 
                      Securities listed on a U.S. exchange are valued at the
                      latest quoted sales prices on the day the valuation is
                      made. Securities listed on a U.S. exchange that are not
                      traded on the valuation date are valued at the mean of the
                      bid and ask prices. The values of foreign securities held
                      by each Portfolio are typically determined as of the close
                      of trading of foreign securities in their respective
                      markets. If events which materially affect the value of a
                      Portfolio's investments occur after the close of the
                      securities markets on which such securities are primarily
                      traded, those investments will be priced at "fair value".
                      All prices of listed securities are taken from the
 
                                       19
<PAGE>   22
 
                      exchange where the security is primarily traded. Unlisted
                      securities for which market quotations are readily
                      available are valued at the latest quoted bid price.
                      Securities may be valued on the basis of prices provided
                      by a pricing service when such prices are believed to
                      reflect the fair market value of such securities. The
                      prices provided by a pricing service may be determined
                      without regard to bid or last prices of each security but
                      take into account institutional size transactions in
                      similar groups of securities as well as any developments
                      related to specific securities. Other assets and
                      securities for which no market quotations are readily
                      available are valued at fair value using methods
                      determined by the Board of Directors of the Fund.
 
                      In determining each Portfolio's net asset value per share,
                      all assets and liabilities initially expressed in foreign
                      currencies will be converted into U.S. dollars using the
                      officially quoted daily exchange rates as determined by
                      Morgan Stanley Capital International (MSCI) in the
                      calculation of their various benchmarking indices. This
                      officially quoted exchange rate may be determined by MSCI
                      prior to or after the close of a particular foreign
                      securities market. If such quotations are not available,
                      the rate of exchange will be determined in accordance with
                      policies established in good faith by the Board of
                      Directors.
 
                      Each Portfolio's share price can be found daily in the
                      mutual fund listings of most major newspapers under the
                      heading of Vanguard.
- --------------------------------------------------------------------------------
 
GENERAL
INFORMATION           The Fund is a Maryland corporation. The Articles of
                      Incorporation permit the Directors to issue 6,000,000,000
                      shares of common stock, with a $.001 par value. The Board
                      of Directors has the power to designate one or more
                      classes ("Portfolios") of shares of common stock and to
                      classify or reclassify any unissued shares with respect to
                      such classes. Currently the Fund is offering five classes
                      of shares.
 
                      The shares of each Portfolio are fully paid and
                      non-assessable; have no preference as to conversion,
                      exchange, dividends, retirement or other features; and
                      have no preemptive rights. Such shares have non-cumulative
                      voting rights, meaning that the holders of more than 50%
                      of the shares voting for the election of Directors can
                      elect 100% of the Directors if they so choose.
 
                      Annual meetings of shareholders will not be held except as
                      required by the Investment Company Act of 1940 and other
                      applicable law. An annual meeting will be held to vote on
                      the removal of a Director or Directors of the Fund if
                      requested in writing by the holders of not less than 10%
                      of the outstanding shares of the Fund.
 
   
                      All securities and cash for the Energy and Health Care
                      Portfolios are held by State Street Bank and Trust
                      Company, Boston, MA. All securities and cash for the Gold
                      & Precious Metals Portfolio are held by Chase Manhattan,
                      New York, NY. CoreStates Bank, N.A. Philadelphia, PA,
                      holds daily cash balances that are used by the Fund's
                      Portfolios to invest in repurchase agreements or
                      securities acquired in these transactions. The Vanguard
                      Group, Inc., Valley Forge, PA, serves as the Fund's
                      Transfer and Dividend Disbursing Agent. Price Waterhouse
                      LLP, serves as independent accountants for the Fund and
                      will audit its financial statements annually. The Fund is
                      not involved in any material litigation.
    
- --------------------------------------------------------------------------------
 
                                       20
<PAGE>   23
 
                               SHAREHOLDER GUIDE
 
   
OPENING AN
ACCOUNT AND
PURCHASING
SHARES                You may open a regular (non-retirement) account, either by
                      mail or wire. Simply complete and return an Account
                      Registration Form and any required legal documentations
                      indicating the amount you wish to invest. Your purchase
                      must be equal to or greater than the $3,000 minimum
                      initial investment requirement for each Portfolio ($1,000
                      for Uniform Gifts/Transfers to Minors Act accounts). You
                      must open a new Individual Retirement Account by mail
                      (IRAs may not be opened by wire) using a Vanguard IRA
                      Adoption Agreement. Your purchase must be equal to or
                      greater than the $1,000 minimum initial investment
                      requirement for IRAs, but no more than $2,000 if you are
                      making a regular IRA contribution. Rollover contributions
                      are generally limited to the amount withdrawn within the
                      past 60 days from an IRA or other qualified Retirement
                      Plan. If you need assistance with the forms or have any
                      questions about the Fund, please call our Investor
                      Information Department (1-800-662-7447). NOTE: For other
                      types of account registrations (e.g., corporations,
                      associations, other organizations, trusts or powers of
                      attorney), please call us to determine which additional
                      forms you may need.
    
 
                      The Fund's shares are purchased at the next-determined net
                      asset value after your investment has been received. The
                      Fund is offered on a no-load basis (i.e., there are no
                      sales commissions or 12b-1 fees).
 
PURCHASE
RESTRICTIONS          1) Because of the risks associated with common stock
                         investments, the Fund is intended to be a long-term
                         investment vehicle and is not designed to provide
                         investors with a means of speculating on short-term
                         stock market movements. Consequently, the Fund reserves
                         the right to reject any specific purchase (and exchange
                         purchase) request. The Fund also reserves the right to
                         suspend the offering of shares for a period of time.
 
                      2) Vanguard will not accept third-party checks to purchase
                         shares of the Fund. Please be sure your purchase check
                         is made payable to the Vanguard Group.
 
   
IMPORTANT NOTE:
1% REDEMPTION FEE     Potential investors should note that a 1% redemption fee
                      is charged by the Energy, Gold & Precious Metals and
                      Health Care Portfolios. This fee, which is paid to the
                      Portfolios, applies to redemptions or exchanges from these
                      Portfolios of shares held for less than 12 months.
    
 
ADDITIONAL
INVESTMENTS           Subsequent investments to regular accounts may be made by
                      mail ($100 minimum), wire ($1,000 minimum), exchange from
                      another Vanguard Fund account ($100 minimum), or Vanguard
                      Fund Express. Subsequent investments to Individual
                      Retirement Accounts may be made by mail ($100 minimum) or
                      exchange from another Vanguard Fund account. In some
                      instances, contributions may be made by wire or Vanguard
                      Fund Express. Please call us for more information on these
                      options.
- --------------------------------------------------------------------------------
 
                                       21
<PAGE>   24
 
   
<TABLE>
<S>                       <C>                                       <C>
                                                                    ADDITIONAL INVESTMENTS
                          NEW ACCOUNT                               TO EXISTING ACCOUNTS
PURCHASING BY MAIL        Please include the amount of              Additional investments should
                          your initial investment and the           include the Invest-by-Mail
Complete and sign the     name of the Portfolio(s) you              remittance form attached to your
enclosed Account          have selected on the                      Fund confirmation statements.
Registration Form         registration form, make your              Please make your check payable
                          check payable to The Vanguard             to The Vanguard Group-(Portfolio
                          Group-(Portfolio Number) (see             Number) (see below), write your
                          below), and mail to:                      account number on your check
                                                                    and, using the return envelope
                          VANGUARD FINANCIAL CENTER                 provided, mail to the address
                          P.O. BOX 2600                             indicated on the Invest-by-Mail
                          VALLEY FORGE, PA 19482-2600               Form.

For express or            VANGUARD FINANCIAL CENTER                 All written requests should be
registered mail,          455 DEVON PARK DRIVE                      mailed to one of the addresses
send to:                  WAYNE, PA 19087-1815                      indicated for new accounts. Do
                                                                    not send registered or express
                                                                    mail to the post office box
                                                                    address.
                          Vanguard Specialized Portfolio
                          Numbers:
                          Energy Portfolio-51
                          Health Care Portfolio-52
                          Gold & Precious Metals
                          Portfolio-53
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                       <C>
PURCHASING BY WIRE                          CORESTATES BANK, N.A.
                                            ABA 031000011
Money should be                             CORESTATES NO. 0101 9897
wired to:                                   ATTN VANGUARD
                                            VANGUARD SPECIALIZED PORTFOLIOS
BEFORE WIRING                               PORTFOLIO NAME
                                            ACCOUNT NUMBER
Please contact                              ACCOUNT REGISTRATION
Client Services
(1-800-662-2739)
</TABLE>
 
                      To assure proper receipt, please be sure your bank
                      includes the Portfolio name, the account number Vanguard
                      has assigned to you and the eight-digit CoreStates number.
                      If you are opening a new account, please complete the
                      Account Registration Form and mail it to the "New Account"
                      address above after completing your wire arrangement.
                      Note: Federal Funds wire purchase orders will be accepted
                      only when the Fund and Custodian Bank are open for
                      business.
- --------------------------------------------------------------------------------
 
PURCHASING BY
EXCHANGE (from a
Vanguard account)     You may open a new account or purchase additional shares
                      by making an exchange from an existing Vanguard account.
                      However, the Fund reserves the right to refuse any
                      exchange purchase request. Call our Client Services
                      Department (1-800-662-2739). The new account will have the
                      same registration as the existing account.
- --------------------------------------------------------------------------------
 
                                       22
<PAGE>   25
 
   
PURCHASING BY
FUND EXPRESS

Special Purchase and
Automatic Investment  The Fund Express Special Purchase option lets you move
                      money from your bank account to your Vanguard account on
                      an "as needed" basis. Or if you choose the Automatic
                      Investment option, money will be moved automatically from
                      your bank account to your Vanguard account on the schedule
                      (monthly, bimonthly [every other month], quarterly,
                      semiannually or annually) you select. To establish these
                      Fund Express options, please provide the appropriate
                      information on the Account Registration Form. We will send
                      you a confirmation of your Fund Express service; please
                      wait three weeks before using the service.
    
- --------------------------------------------------------------------------------
 
CHOOSING A
DISTRIBUTION
OPTION                You must select one of three distribution options:
 
   
                      1. AUTOMATIC REINVESTMENT OPTION -- Both dividend and
                         capital gain distributions will be reinvested in
                         additional Fund shares. This option will be selected
                         for you automatically unless you specify one of the
                         other options.
    
 
                      2. CASH DIVIDEND OPTION -- Your dividends will be paid in
                         cash and your capital gains will be reinvested in
                         additional Fund shares.
 
   
                      3. ALL CASH OPTION -- Both dividend and capital gain
                         distributions will be paid in cash.
    
 
                      In addition, an option to invest your cash dividends
                      and/or capital gains distributions in another Vanguard
                      Fund account is available. Please call our Client Services
                      Department (1-800-662-2739) for information. You may also
                      elect Vanguard Dividend Express which allows you to
                      transfer your cash dividends and/or capital gains
                      distributions automatically to your bank account. Please
                      see "Other Vanguard Services" for more information.
- --------------------------------------------------------------------------------
 
TAX CAUTION
Investors should ask
about the timing of
capital gains and
dividend distributions
before investing      Under Federal tax laws, the Fund is required to distribute
                      net capital gains and dividend income to Fund
                      shareholders. These distributions are made to all
                      shareholders who own Fund shares as of the distribution's
                      record date, regardless of how long the shares have been
                      owned. Purchasing shares just prior to the record date
                      could have a significant impact on your tax liability for
                      the year. For example, if you purchase shares immediately
                      prior to the record date of a sizable capital gain or
                      income dividend distribution, you will be assessed taxes
                      on the amount of the capital gain and/or dividend
                      distribution later paid even though you owned the Fund
                      shares for just a short period of time. (Taxes are due on
                      the distributions even if the dividend or gain is
                      reinvested in additional Fund shares.) While the total
                      value of your investment will be the same after the
                      distribution -- the amount of the distribution will offset
                      the drop in the net asset value of the shares -- you
                      should be aware of the tax implications the timing of your
                      purchase may have.
 
   
                      Prospective investors should, therefore, inquire about
                      potential distributions before investing. The Fund's
                      annual dividend and capital gains distribution normally
                      occurs in December for the Energy, Gold & Precious Metals,
                      and Health Care Portfolios. In addition, the Portfolios
                      may occasionally be required to make supplemental dividend
                      or capital gains distributions at some other time during
                      the year. For additional
    
 
                                       23
<PAGE>   26
 
                      information on distributions and taxes, see the section
                      titled "Dividends, Capital Gains, and Taxes."
- --------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION

ESTABLISHING OPTIONAL
SERVICES              The easiest way to establish optional Vanguard services on
                      your account is to select the options you desire when you
                      complete your Account Registration Form. IF YOU WISH TO
                      ADD SHAREHOLDER OPTIONS LATER, YOU MAY NEED TO PROVIDE
                      VANGUARD WITH ADDITIONAL INFORMATION AND A SIGNATURE
                      GUARANTEE. PLEASE CALL OUR CLIENT SERVICES DEPARTMENT
                      (1-800-662-2739) FOR FURTHER ASSISTANCE.
 
SIGNATURE
GUARANTEES            For our mutual protection, we may require a signature
                      guarantee on certain written transaction requests. A
                      signature guarantee verifies the authenticity of your
                      signature and may be obtained from banks, brokers and any
                      other guarantor that Vanguard deems acceptable. A
                      SIGNATURE GUARANTEE CANNOT BE PROVIDED BY A NOTARY PUBLIC.
 
   
CERTIFICATES          Share certificates will be issued upon request. If a
                      certificate is lost, you may incur an expense to replace
                      it.
    
 
BROKER-DEALER
PURCHASES             If you purchase shares in Vanguard Funds through a
                      registered broker-dealer or investment adviser, the
                      broker-dealer or adviser may charge a service fee.
 
CANCELLING TRADES     The Fund will not cancel any trade (e.g., a purchase,
                      exchange or redemption) believed to be authentic, received
                      in writing or by telephone, once the trade request has
                      been received.
 
   
ELECTRONIC
PROSPECTUS
DELIVERY              You may receive a prospectus for the Fund or any of the
                      Vanguard Funds in an electronic format. Please call
                      1-800-231-7870 for additional information or see "Other
                      Vanguard Services -- Computer Access." You may also
                      receive a paper copy of the prospectus, by calling
                      1-800-662-7447.
    
- --------------------------------------------------------------------------------
 
WHEN YOUR
ACCOUNT WILL BE
CREDITED              Your trade date is the date on which your account is
                      credited. If your purchase is made by check, Federal Funds
                      wire or exchange, and is received by the close of the New
                      York Stock Exchange (generally 4:00 p.m. Eastern time),
                      your trade date is the day of receipt. If your purchase is
                      received after the close of the Exchange, your trade date
                      is the next business day. Your shares are purchased at the
                      net asset value determined on your trade date.
 
                      In order to prevent lengthy processing delays caused by
                      the clearing of foreign checks, Vanguard will only accept
                      a foreign check which has been drawn in U.S. dollars and
                      has been issued by a foreign bank with a U.S.
                      correspondent bank. The name of the U.S. correspondent
                      bank must be printed on the face of the foreign check.
- --------------------------------------------------------------------------------
 
   
SELLING YOUR
SHARES                You may withdraw any portion of the funds in your account
                      by redeeming shares at any time. (Please see "Important
                      Redemption Information.") You generally may initiate a
                      request by writing or by telephoning. Your redemption
                      proceeds are normally mailed within two business days
                      after the receipt of the request in Good Order.
    
 
   
                      IMPORTANT NOTE: For investors in the Energy, Gold &
                      Precious Metals and Health Care Portfolios, a redemption
                      fee amounting to 1% of the value of the shares
    
 
                                       24
<PAGE>   27
 
                      redeemed will be deducted from the redemption proceeds of
                      any shares held for less than one year. This fee is paid
                      directly to the Portfolio.
- --------------------------------------------------------------------------------
 
SELLING BY MAIL       Requests should be mailed to VANGUARD FINANCIAL CENTER,
                      VANGUARD SPECIALIZED PORTFOLIOS, P.O. BOX 1120, VALLEY
                      FORGE, PA 19482. (For express or registered mail, send
                      your request to Vanguard Financial Center, Vanguard
                      Specialized Portfolios, 455 Devon Park Drive, Wayne, PA
                      19087).
 
                      The redemption price of shares will be the Portfolio's net
                      asset value next determined after Vanguard has received
                      all required documents in Good Order.
- --------------------------------------------------------------------------------
 
DEFINITION OF
GOOD ORDER            GOOD ORDER means that the request includes the following:
 
                      1. The account number and Portfolio name.
                      2. The amount of the transaction (specified in dollars or
                         shares).
                      3. The signatures of all owners EXACTLY as they are
                         registered on the account.
                      4. Any required signature guarantees.
                      5. Other supporting legal documentation that might be
                         required, in the case of estates, corporations, trusts,
                         and certain other accounts.
                      6. Any certificates you are holding for the account.
 
                      IF YOU HAVE QUESTIONS ABOUT THIS DEFINITION AS IT PERTAINS
                      TO YOUR REQUEST, PLEASE CALL OUR CLIENT SERVICES
                      DEPARTMENT AT 1-800-662-2739.
- --------------------------------------------------------------------------------
 
   
SELLING BY
TELEPHONE             To sell shares by telephone, you or your pre-authorized
                      representative may call our Client Services Department at
                      1-800-662-2739. The proceeds will be sent to you by mail.
                      PLEASE NOTE: As a protection against fraud, your telephone
                      mail redemption privilege will be suspended for 15
                      calendar days following any expedited address change to
                      your account. An expedited address change is one that is
                      made by telephone, or in writing, without the signatures
                      of all account owners. Please see "Important Information
                      About Telephone Transactions."
    
- --------------------------------------------------------------------------------
 
   
SELLING BY FUND
EXPRESS

Automatic Withdrawal
& Special Redemption  If you select the Fund Express Automatic Withdrawal
                      option, money will be automatically moved from your
                      Vanguard Fund account to your bank account according to
                      the schedule you have selected. The Special Redemption
                      option lets you move money from your Vanguard account to
                      your bank account on an "as needed" basis. To establish
                      these Fund Express options, please provide the appropriate
                      information on the Account Registration Form. We will send
                      you a confirmation of your Fund Express service; please
                      wait two weeks before using the service.
    
- --------------------------------------------------------------------------------
 
SELLING BY EXCHANGE   You may sell shares by making an exchange into another
                      Vanguard Fund account. Please see "Exchanging Your Shares"
                      for details.
- --------------------------------------------------------------------------------
 
IMPORTANT REDEMPTION
INFORMATION           Shares purchased by check or Fund Express may be redeemed
                      at any time. However, your redemption proceeds will not be
                      paid until payment for the purchase is collected, which
                      may take up to ten calendar days.
- --------------------------------------------------------------------------------
 
                                       25
<PAGE>   28
 
DELIVERY OF
REDEMPTION
PROCEEDS              Redemption requests received by telephone prior to the
                      close of the New York Stock Exchange (generally 4:00 p.m.
                      Eastern time) are processed on the day of receipt and the
                      redemption proceeds are normally sent on the following
                      business day.
 
                      Redemption requests received by telephone after the close
                      of the Exchange are processed on the business day
                      following receipt and the proceeds are normally sent on
                      the second business day following receipt.
 
                      Redemption proceeds must be sent to you within seven days
                      of receipt of your request in Good Order, except as
                      described above in "Important Redemption Information."
 
                      If you experience difficulty in making a telephone
                      redemption during periods of drastic economic or market
                      changes, your redemption request may be made by regular or
                      express mail. It will be implemented at the net asset
                      value next determined after your request has been received
                      by Vanguard in Good Order. The Fund reserves the right to
                      revise or terminate the telephone redemption privilege at
                      any time.
 
                      The Fund may suspend the redemption right or postpone
                      payment at times when the New York Stock Exchange is
                      closed or under any emergency circumstances as determined
                      by the United States Securities and Exchange Commission.
 
                      If the Board of Directors determines that it would be
                      detrimental to the best interests of the Fund's remaining
                      shareholders to make payment in cash, the Fund may pay
                      redemption proceeds in whole or in part by a distribution
                      in kind of readily marketable securities.
- --------------------------------------------------------------------------------
 
VANGUARD'S AVERAGE
COST STATEMENT        If you make a redemption from a qualifying account,
                      Vanguard will send you an Average Cost Statement which
                      provides you with the tax basis of the shares you
                      redeemed. Please see "Statements and Reports" for
                      additional information.
- --------------------------------------------------------------------------------
 
   
LOW BALANCE FEE
AND MINIMUM
ACCOUNT BALANCE
REQUIREMENT           Due to the relatively high cost of maintaining smaller
                      accounts, the Fund will automatically deduct a $10 annual
                      fee from non-retirement accounts with balances falling
                      below $2,500 ($500 for Uniform Gifts/Transfers to Minors
                      Act accounts). The fee generally will be waived for
                      investors whose aggregate Vanguard Assets exceed $50,000.
    
 
                      In addition, the Fund reserves the right to liquidate any
                      non-retirement account that is below the minimum initial
                      investment amount of $3,000. If at any time your total
                      investment does not have a value of at least $3,000, you
                      may be notified that your account is below the Fund's
                      minimum account balance requirement. You would then be
                      allowed 60 days to make an additional investment before
                      the account is liquidated. Proceeds would be promptly paid
                      to the registered shareholder.
 
                      Vanguard will not liquidate your account if it has fallen
                      below $3,000 solely as a result of declining markets
                      (i.e., a decline in a Portfolio's net asset value).
- --------------------------------------------------------------------------------
 
EXCHANGING YOUR
SHARES                Should your investment goals change, you may exchange your
                      shares of Vanguard Specialized Portfolios for those of
                      other available Vanguard Funds.
 
                                       26
<PAGE>   29
 
   
c                     IMPORTANT NOTE: For investors in the Energy, Gold &
                      Precious Metals and Health Care Portfolios, a redemption
                      fee amounting to 1% of the value of the shares exchanged
                      will be deducted from the exchange proceeds if shares held
                      for less than one year are exchanged. This fee is paid
                      directly to the Portfolio.
    
 
   
EXCHANGING BY
TELEPHONE
Call Client Services
(1-800-662-2739)      When exchanging shares by telephone, please have ready the
                      Portfolio name, account number, Social Security number or
                      employer identification number listed on the account and
                      exact name and address in which the account is registered.
                      Only the registered shareholder or his or her
                      pre-authorized representative may complete such an
                      exchange. Requests for telephone exchanges received prior
                      to the close of trading on the New York Stock Exchange
                      (generally 4:00 p.m. Eastern time) are processed at the
                      close of business that same day. Requests received after
                      the close of the Exchange are processed the next business
                      day. TELEPHONE EXCHANGES FOR NON-RETIREMENT INVESTMENTS
                      ARE NOT ACCEPTED INTO OR FROM VANGUARD BALANCED INDEX
                      FUND, VANGUARD INDEX TRUST, VANGUARD REIT INDEX PORTFOLIO,
                      VANGUARD INTERNATIONAL EQUITY INDEX FUND AND THE GROWTH
                      AND INCOME PORTFOLIO OF VANGUARD QUANTITATIVE PORTFOLIOS.
                      If you experience difficulty in making a telephone
                      exchange, your exchange request may be made by regular or
                      express mail, and it will be implemented at the closing
                      net asset value on the date received by Vanguard, provided
                      the request is received in Good Order.
    
 
EXCHANGING BY MAIL    Please be sure to include on your exchange request the
                      name and account number of your current Portfolio, the
                      name of the Fund you wish to exchange into, the amount you
                      wish to exchange, and the signatures of all registered
                      account holders. Send your request to VANGUARD FINANCIAL
                      CENTER, VANGUARD SPECIALIZED PORTFOLIOS, P.O. BOX 1120,
                      VALLEY FORGE, PA 19482. (For express or registered mail,
                      send your request to Vanguard Financial Center, Vanguard
                      Specialized Portfolios, 455 Devon Park Drive, Wayne, PA
                      19087).
 
EXCHANGING ON-LINE    You may use your personal computer to exchange shares of
                      most Vanguard funds by accessing Vanguard's website
                      (http://www.vanguard.com). To establish this service on
                      your account, you must first register through our website.
                      We will then send to you by mail, an account access
                      password that will enable you to make on-line exchanges.
 
   
                      The Vanguard funds that you cannot purchase or sell
                      through on-line exchange are VANGUARD INDEX TRUST,
                      VANGUARD BALANCED INDEX FUND, VANGUARD INTERNATIONAL
                      EQUITY INDEX FUND, VANGUARD REIT INDEX PORTFOLIO, VANGUARD
                      TOTAL INTERNATIONAL PORTFOLIO, and VANGUARD GROWTH AND
                      INCOME PORTFOLIO (formerly known as Vanguard Quantitative
                      Portfolio). These funds do permit on-line exchanges within
                      IRAs and other retirement accounts.
    
- --------------------------------------------------------------------------------
 
IMPORTANT EXCHANGE
INFORMATION           Before you make an exchange, you should consider the
                      following:
 
                      - Please read the Fund's prospectus before making an
                        exchange. For a copy and for answers to any questions
                        you may have, call our Investor Information Department
                        (1-800-662-7447).
 
                                       27
<PAGE>   30
 
                      - An exchange is treated as a redemption and a purchase.
                        Therefore, you could realize a taxable gain or loss on
                        the transaction.
 
   
                      - Exchanges are accepted only if the registrations and the
                        taxpayer identification numbers of the two accounts are
                        identical.
    
 
                      - The shares to be exchanged must be on deposit and not
                        held in certificate form.
 
   
                      - New accounts are not currently accepted in
                        Vanguard/Windsor Fund.
    
 
                      - The redemption price of shares redeemed by exchange is
                        the net asset value next determined after Vanguard has
                        received the required documentation in Good Order.
 
                      - When opening a new account by exchange, you must meet
                        the minimum investment requirement of the new Fund.
 
                      Every effort will be made to maintain the exchange
                      privilege. However, the Fund reserves the right to revise
                      or terminate its provisions, limit the amount of or reject
                      any exchange, as deemed necessary, at any time.
 
                      The Fund's exchange privilege is only available in states
                      in which the shares of the Fund are registered for sale.
                      The Fund's shares are currently registered for sale in all
                      50 states and the Fund intends to maintain such
                      registration.
- --------------------------------------------------------------------------------
 
EXCHANGE
PRIVILEGE
LIMITATIONS           The Fund's exchange privilege is not intended to afford
                      shareholders a way to speculate on short-term movements in
                      the market. Accordingly, in order to prevent excessive use
                      of the exchange privilege that may potentially disrupt the
                      management of the Fund and increase transaction costs, the
                      Fund has established a policy of limiting excessive
                      exchange activity.
 
                      Exchange activity generally will not be deemed excessive
                      if limited to THREE SUBSTANTIVE EXCHANGE REDEMPTIONS (AT
                      LEAST 30 DAYS APART) from a Portfolio of the Fund during
                      any twelve-month period. Notwithstanding these
                      limitations, the Fund reserves the right to reject any
                      purchase request (including exchange purchases from other
                      Vanguard Portfolios) that is reasonably deemed to be
                      disruptive to efficient portfolio management.
- --------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION
ABOUT TELEPHONE
TRANSACTIONS          The ability to initiate redemptions (except wire
                      redemptions) and exchanges by telephone is automatically
                      established on your account unless you request in writing
                      that telephone transactions on your account not be
                      permitted.
 
                      To protect your account from losses resulting from
                      unauthorized or fraudulent telephone instructions,
                      Vanguard adheres to the following security procedures:
 
   
                      1. SECURITY CHECK.  To request a transaction by telephone,
                         the caller must know (i) the name of the Portfolio;
                         (ii) the 10-digit account number; (iii) the exact name
                         and address used in the registration; and (iv) the
                         Social Security or employer identification number
                         listed on the account.
    
 
                      2. PAYMENT POLICY.  The proceeds of any telephone
                         redemption by mail will be made payable to the
                         registered shareowner and mailed to the address of
                         record only.
 
                                       28
<PAGE>   31
 
   
                      Neither the Fund nor Vanguard will be responsible for the
                      authenticity of transaction instructions received by
                      telephone, provided that reasonable security procedures
                      have been followed. Vanguard believes that the security
                      procedures described above are reasonable, and that if
                      such procedures are followed, you will bear the risk of
                      any losses resulting from unauthorized or fraudulent
                      telephone transactions on your account.
    
- --------------------------------------------------------------------------------
 
   
TRANSFERRING
REGISTRATION          You may transfer the registration of any of your Fund
                      shares to another person by completing a transfer form and
                      sending it to: VANGUARD FINANCIAL CENTER, P.O. BOX 1110,
                      VALLEY FORGE, PA 19482, ATTENTION: TRANSFER DEPARTMENT.
                      The request must be in Good Order. TO REQUEST A TRANSFER
                      FORM AND FULL INSTRUCTIONS PLEASE CALL OUR CLIENT SERVICES
                      DEPARTMENT (1- 800-662-2739).
    
- --------------------------------------------------------------------------------
 
STATEMENTS AND
REPORTS               Vanguard will send you a confirmation statement each time
                      you initiate a transaction in your account except for
                      checkwriting redemptions from Vanguard money market
                      accounts. You will also receive a comprehensive account
                      statement at the end of each calendar quarter. The
                      fourth-quarter statement will be a year-end statement,
                      listing all transaction activity for the entire calendar
                      year.
 
   
                      Vanguard's Average Cost Statement provides you with the
                      average cost of shares redeemed from your account during
                      the calendar year using the average cost single category
                      method. This service is available for most taxable
                      accounts opened since January 1, 1986. In general,
                      investors who redeemed shares from a qualifying Vanguard
                      account may expect to receive their Average Cost Statement
                      along with their Portfolio Summary Statement. Please call
                      our Client Services Department (1-800-662-2739) for
                      information.
    
 
                      Financial reports on the Fund will be mailed to you
                      semi-annually, according to the Fund's fiscal year-end.
- --------------------------------------------------------------------------------
 
OTHER VANGUARD
SERVICES              For more information about any of these services, please
                      call our Investor Information Department at
                      1-800-662-7447.
 
VANGUARD DIRECT
DEPOSIT SERVICE       With Vanguard's Direct Deposit Service, most U.S.
                      Government checks (including Social Security and military
                      pension checks) and private payroll checks may be
                      automatically deposited into your Vanguard Fund account.
                      Separate brochures and forms are available for direct
                      deposit of U.S. Government and private payroll checks.
 
VANGUARD AUTOMATIC
EXCHANGE SERVICE      Vanguard's Automatic Exchange Service allows you to move
                      money automatically among your Vanguard Fund accounts. For
                      instance, the service can be used to "dollar cost average"
                      from a money market portfolio into a stock or bond fund or
                      to contribute to an IRA or other retirement plan. Please
                      contact our Client Services Department at 1-800-662-2739
                      for additional information.
 
VANGUARD FUND
EXPRESS               Vanguard's Fund Express allows you to transfer money
                      between your Fund account and your account at a bank,
                      savings and loan association, or a credit union that is a
                      member of the Automated Clearing House (ACH) system. You
                      may elect this service
 
                                       29
<PAGE>   32
 
                      on the Account Registration Form or call our Investor
                      Information Department (1-800-662-7447) for a Fund Express
                      application.
 
                      Special rules govern how your Fund Express purchases or
                      redemptions are credited to your account. In addition,
                      some services of Fund Express cannot be used with specific
                      Vanguard Funds. For more information, please refer to the
                      Vanguard Fund Express brochure.
 
VANGUARD DIVIDEND
EXPRESS
                      Vanguard's Dividend Express allows you to transfer your
                      dividends and/or capital gains distributions automatically
                      from your Fund account, one business day after the Fund's
                      payable date, to your account at a bank, savings and loan
                      association, or a credit union that is a member of the
                      Automated Clearing House (ACH) system. You may elect this
                      service on the Account Registration Form or call our
                      Investor Information Department (1-800-662-7447) for a
                      Vanguard Dividend Express application.
 
   
VANGUARD
TELE-ACCOUNT
                      Vanguard's Tele-Account is a convenient, automated service
                      that provides share price, price change and yield
                      quotations on Vanguard Funds through any TouchTone(TM)
                      telephone. This service also lets you obtain information
                      about your account balance, your last transaction, and
                      your most recent dividend or capital gains payment. In
                      addition, you may perform investment exchanges of Vanguard
                      Fund shares and redemptions by check using Tele-Account.
                      To contact Vanguard's Tele-Account service, dial
                      1-800-ON-BOARD (1-800-662-6273). A brochure offering
                      detailed operating instructions is available from our
                      Investor Information Department (1-800-662-7447).
    
 
   
COMPUTER ACCESS
    
 
   
VANGUARD ON THE
WORLD WIDE WEB
http://www.vanguard.com
                      Vanguard sponsors an education-oriented website offering
                      news and information about Vanguard Funds and services, as
                      well as interactive, easy-to-use investment planning
                      tools.
    
- --------------------------------------------------------------------------------
 
                                       30
<PAGE>   33
 
                     [This page intentionally left blank.]
<PAGE>   34
 
                    Vanguard 
                    Specialized Portfolios
 
                    -----------------------------------------------
 
                    THE VANGUARD GROUP
                    Vanguard Financial Center
                    P.O. Box 2600
                    Valley Forge, PA 19482
 
                    INVESTOR INFORMATION
                     DEPARTMENT:
                    1-800-662-7447 (SHIP)
 
                    CLIENT SERVICES
                     DEPARTMENT:
                    1-800-662-2739 (CREW)
 
                    TELE-ACCOUNT FOR
                     24-HOUR ACCESS:
                    1-800-662-6273 (ON BOARD)
 
                    TELECOMMUNICATION SERVICE
                     FOR THE HEARING IMPAIRED:
                    1-800-662-2738
 
                    TRANSFER AGENT:
                    The Vanguard Group, Inc.
                    Vanguard Financial Center
                    Valley Forge, PA 19482
 
                                                       Vanguard                 
                                                  Specialized Portfolios
                                            P   R   O  S  P  E  C  T  U  S
 
   
                                                     MAY 30, 1997
    
 
                                                     A member of           
                                                 The Vanguard Group
     P051
 
- --------------------------------------------------------------------------------
<PAGE>   35
 
================================================================================
 
Vanguard Utilities Income Portfolio LOGO
                                                  A Member of The Vanguard Group
================================================================================
 
   
PROSPECTUS -- MAY 30, 1997
    
- --------------------------------------------------------------------------------
 
NEW ACCOUNT INFORMATION: INVESTOR INFORMATION DEPARTMENT -- 1-800-662-7447
(SHIP)
- --------------------------------------------------------------------------------
 
SHAREHOLDER ACCOUNT SERVICES: CLIENT SERVICES DEPARTMENT -- 1-800-662-2739
(CREW)
- --------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVE
AND POLICIES          Vanguard Specialized Portfolios, Inc. (the "Fund") is an
                      open-end diversified investment company which consists of
                      five Portfolios. This prospectus relates only to the
                      Utilities Income Portfolio (the "Portfolio"). The
                      objective of the Portfolio is to provide current income
                      and growth of capital and income. The Portfolio invests
                      primarily in common stocks and bonds of utilities
                      companies. Given its specialized focus, the Portfolio
                      should not be considered a complete investment program.
                      There is no assurance that the Portfolio will achieve its
                      stated objective. Shares of the Fund are neither insured
                      nor guaranteed by any agency of the U.S. Government,
                      including the FDIC.
- --------------------------------------------------------------------------------
 
OPENING AN
ACCOUNT               To open a regular (non-retirement) account, please
                      complete and return the Account Registration Form. If you
                      need assistance in completing this Form, please call our
                      Investor Information Department. To open an Individual
                      Retirement Account (IRA), please use a Vanguard IRA
                      Adoption Agreement, to obtain a copy of this form, call
                      1-800-662-7447 Monday through Friday, from 8:00 a.m. to
                      9:00 p.m. (Eastern time), and Saturday, from 9:00 a.m. to
                      4:00 p.m. (Eastern time). The minimum initial investment
                      is $3,000 or $1,000 for Uniform Gifts/Transfers to Minors
                      Act accounts. The Portfolio is offered on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
                      However, the Portfolio incurs expenses for investment
                      advisory, management, administrative and distribution
                      services.
- --------------------------------------------------------------------------------
 
   
ABOUT THIS
PROSPECTUS            This Prospectus is designed to set forth concisely the
                      information you should know about the Portfolio before you
                      invest. It should be retained for future reference. A
                      "Statement of Additional Information" containing
                      additional information about the Portfolio has been filed
                      with the Securities and Exchange Commission. Such
                      Statement is dated May 30, 1997, and has been incorporated
                      by reference into this Prospectus. A copy may be obtained
                      without charge by writing to the Portfolio or by calling
                      the Investor Information Department. The Securities and
                      Exchange Commission maintains a website
                      (http://www.sec.gov) which contains the Statement of
                      Additional Information, material incorporated by
                      reference, and other information regarding the Fund.
    
- --------------------------------------------------------------------------------
TABLE OF CONTENTS
 
   
<TABLE>
<S>                                        <C>                                        <C>
                                   Page                                      Page                                     Page
Portfolio Expenses  ................ 2     Who Should Invest .................. 7     SHAREHOLDER GUIDE
Financial Highlights ............... 2     Implementation of Policies.......... 7     Opening an Account and
Yield and Total Return ............. 3     Investment Limitations ............ 10     Purchasing Shares ............... 16
        FUND INFORMATION                   Management of the                          When Your Account Will
Investment Objective  .............. 4     Portfolio ........ 11                      Be Credited ..................... 19
Investment Policies ................ 4     Investment Adviser ................ 12     Selling Your
Investment Risks  .................. 4     Dividends, Capital Gains                   Shares .......................... 19
                                           and Taxes ......................... 13     Exchanging Your Shares .......... 21
                                           The Share Price of the                     Important Information About
                                           Portfolio ...... 14                        Telephone Transactions .......... 23
                                           General Information ............... 15     Transferring
                                                                                      Registration .................... 23
                                                                                      Other Vanguard Services ......... 24
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
- --------------------------------------------------------------------------------
<PAGE>   36
 
   
PORTFOLIO
EXPENSES              The following table illustrates ALL expenses and fees that
                      you would incur as a shareholder of the Portfolio. The
                      expenses and fees set forth below are based upon expenses
                      incurred in the fiscal year ended January 31, 1997.
    
 
   
<TABLE>
<CAPTION>
                           <S>                                                                <C>       <C>
                                                    SHAREHOLDER TRANSACTION EXPENSES
                           -----------------------------------------------------------------------------------
                           Sales Load Imposed on Purchases...............................                None
                           Sales Load Imposed on Reinvested Dividends....................                None
                           Redemption Fees...............................................                None
                           Exchange Fees.................................................                None
                                                        ANNUAL OPERATING EXPENSES
                           -----------------------------------------------------------------------------------
                           Management & Administrative Expenses..........................                0.29%
                           Investment Advisory Fees......................................                0.08%
                           12b-1 Fees....................................................                None
                           Other Expenses
                             Distribution Costs..........................................     0.02
                             Miscellaneous Expenses......................................     0.01%
                                                                                              ----
                           Total Other Expenses..........................................                0.03%
                                                                                                        ------
                                    TOTAL OPERATING EXPENSES.............................                0.40%
                                                                                                        ======
                          The purpose of this table is to assist you in understanding the various
                          costs and expenses that you would bear directly or indirectly as an
                          investor in the Portfolio.

                          The following example illustrates the expenses that you would incur on a
                          $1,000 investment over various periods, assuming (1) a 5% annual rate of
                          return and (2) redemption at the end of each period.
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                1 YEAR        3 YEARS       5 YEARS       10 YEARS
                                ------        -------       -------       --------
                                <S>           <C>           <C>           <C>
                                  $ 4           $13           $22           $ 51
                          THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
                          EXPENSES OR PERFORMANCE. ACTUAL EXPENSES MAY BE HIGHER OR LOWER THAN
                          THOSE SHOWN.
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
   
FINANCIAL
HIGHLIGHTS            The following financial highlights for a share outstanding
                      throughout each period, have been audited by Price
                      Waterhouse LLP, independent accountants, whose report on
                      the financial statements which include this information
                      was unqualified. This information should be read in
                      conjunction with the Fund's financial statements and notes
                      thereto, which, together with the remaining portions of
                      the Fund's 1997 Annual Report to Shareholders, are
                      incorporated by reference in the Statement of Additional
                      Information and in this Prospectus, and which appear,
                      along with the report of Price Waterhouse LLP, in the
                      Fund's 1997 Annual Report to Shareholders. For a more
                      complete discussion of the Fund's performance, please see
                      the Fund's 1997 Annual Report to Shareholders which may be
                      obtained without charge by writing to the Fund or by
                      calling our Investor Information Department at
                      1-800-662-7447.
    
 
                                        2
<PAGE>   37
 
   
<TABLE>
<CAPTION>
                                                    -------------------------------------------------------
                                                                  UTILITIES INCOME PORTFOLIO
                                                    -------------------------------------------------------
                                                                                            MAY 15, 1992+,
                                                           YEAR ENDED JANUARY 31,                 TO
                                                     1997      1996      1995      1994      JAN. 31, 1993
- -----------------------------------------------------------------------------------------------------------
<S>                                                 <C>       <C>       <C>       <C>       <C>
NET ASSET VALUE, BEGINNING OF PERIOD..............   $12.84    $10.42    $11.67    $11.18        $10.00
                                                    -------   -------   -------   -------   -----------
INVESTMENT OPERATIONS
  Net Investment Income...........................      .58       .56       .56       .57           .41
  Net Realized and Unrealized Gain (Loss) on
    Investments...................................      .09      2.42     (1.10)      .88          1.03
                                                     ------    ------    ------    ------    ----------
    TOTAL FROM INVESTMENT OPERATIONS..............      .67      2.98      (.54)     1.45          1.44
- -----------------------------------------------------------------------------------------------------------
DISTRIBUTIONS
  Dividends from Net Investment Income............     (.56)     (.56)     (.59)     (.56)         (.24)
  Distributions from Realized Capital Gains.......     (.02)       --      (.12)     (.40)         (.02)
                                                     ------    ------    ------    ------    ----------
    TOTAL DISTRIBUTIONS...........................     (.58)     (.56)     (.71)     (.96)         (.26)
- -----------------------------------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD....................   $12.93    $12.84    $10.42    $11.67        $11.18
===========================================================================================================
TOTAL RETURN......................................     5.51%    29.47%    (4.47)%   13.08%        14.51%
===========================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)..............     $644      $781      $593      $738          $361
Ratio of Expenses to Average Net Assets...........     0.40%     0.44%**    0.50%    0.42%         0.45%*
Ratio of Net Investment Income to Average Net
  Assets..........................................     4.63%     4.88%     5.43%     4.82%         4.70%*
Portfolio Turnover Rate...........................       38%       35%       35%       46%           20%
Average Commission Rate Paid......................   $.0568       N/A       N/A       N/A           N/A
   * Annualized
   + Commencement of operations.
  ** Effective in fiscal 1996, does not include reductions from directed brokerage arrangements. The 1996
     Ratio of Expenses to Average Net Assets is .41% after including these reductions.
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
YIELD AND TOTAL
RETURN                From time to time the Portfolio may advertise its yield
                      and total return. Both yield and total return figures are
                      based on historical earnings and are not intended to
                      indicate future performance. The "total return" of the
                      Portfolio refers to the average annual compounded rates of
                      return over one-, five- and ten-year periods or for the
                      life of the Portfolio (as stated in the advertisement)
                      that would equate an initial amount invested at the
                      beginning of a stated period to the ending redeemable
                      value of the investment, assuming the reinvestment of all
                      dividend and capital gains distributions.
 
                      In accordance with industry guidelines set forth by the
                      U.S. Securities and Exchange Commission, the "30-day
                      yield" of the Portfolio is calculated by dividing net
                      investment income per share earned during a 30-day period
                      by the net asset value per share on the last day of the
                      period. Net investment income includes interest and
                      dividend income earned on the Portfolio's securities; it
                      is net of all expenses and all recurring and nonrecurring
                      charges that have been applied to all shareholder
                      accounts. The yield calculation assumes that net
                      investment income earned over 30 days is compounded
                      monthly for six months and then annualized. Methods used
                      to calculate advertised yields are standardized for all
                      stock and bond mutual funds. However, these methods differ
                      from the accounting methods used by the Portfolio to
                      maintain its books and records, and so the advertised
                      30-day yield may not fully reflect the income paid to an
                      investor's account or the yield reported in the
                      Portfolio's financial statements.
 
                                        3
<PAGE>   38
 
                      Also, the Portfolio may compare its performance to that of
                      various stock market indices, including the Standard &
                      Poor's 500 Index and the Standard & Poor's Utility Index.
- --------------------------------------------------------------------------------
 
INVESTMENT
OBJECTIVE
THE PORTFOLIO SEEKS
CURRENT INCOME        The primary objective of the Portfolio is to provide
                      current income. Its secondary objective is to provide
                      moderate growth of capital and income. There can be no
                      assurance that the Portfolio will achieve its stated
                      objective. The Portfolio is one of five Portfolios of
                      Vanguard Specialized Portfolios, Inc. (the "Fund").
 
                      The investment objective of the Portfolio is fundamental
                      and so cannot be changed without the approval of a
                      majority of the Portfolio's shareholders.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
POLICIES
THE PORTFOLIO INVESTS
IN UTILITY STOCKS AND
BONDS                 Under normal circumstances, the Portfolio will invest at
                      least 75% of its assets in equity securities of companies
                      in the utilities industries. The remainder of the
                      Portfolio's assets will be invested in utility bonds rated
                      BBB or better by Standard & Poor's Corporation or Baa or
                      better by Moody's Investors Service, Inc. The Portfolio
                      may also invest in bonds issued by multi-national
                      entities, foreign governments, their agencies and
                      instrumentalities and companies domiciled outside the
                      United States; however, these securities must be valued in
                      U.S. dollars and be rated A or better. Because of its
                      emphasis on higher-yielding utility stocks and its
                      holdings of utility bonds, the Portfolio is expected to
                      offer a dividend yield well above the stock market
                      average. The Portfolio is managed without regard to tax
                      ramifications.
    
 
   
FOREIGN SECURITIES    The Portfolio will invest primarily in securities that
                      trade in U.S. markets. The Portfolio may invest up to 30%
                      of its assets in foreign securities. In order to protect
                      against fluctuations in foreign exchange rates, the
                      Portfolio may invest in forward foreign currency exchange
                      contracts.
    
 
                      Besides investing primarily in equity securities, the
                      Portfolio may hold certain short-term fixed income
                      securities as cash reserves. The Portfolio may also invest
                      in stock futures contracts and options to a limited
                      extent. See "Implementation of Policies" for a description
                      of these and other investment practices of the Fund.
 
                      The Portfolio is responsible for voting the shares of all
                      securities it holds.
 
                      The investment policies of the Portfolio are not
                      fundamental and so may be changed by the Board of
                      Directors without shareholder approval. However,
                      shareholders would be notified prior to a material change
                      in either.
- --------------------------------------------------------------------------------
 
INVESTMENT RISKS      As a mutual fund specializing in utility stocks and bonds,
                      the Portfolio is subject primarily to four types of risk:
                      stock market risk, interest rate risk, industry risk, and
                      manager risk. Since the Portfolio may invest in foreign
                      securities, investors are also exposed to currency risk
                      and other risks of international investing.
 
   
MARKET RISK MAY BE
SUBSTANTIAL           MARKET RISK is the possibility that stock prices in
                      general will decline over short or even extended periods.
                      The stock market tends to be cyclical, with periods when
                      stock prices generally rise and periods when stock prices
                      generally decline. Stocks have provided annual total
                      returns (capital appreciation plus dividend income)
                      averaging +10.8% for all 10-year periods from 1926 to
                      1996, as measured by the
    
 
                                        4
<PAGE>   39
 
                      Standard & Poor's 500 Composite Stock Price Index. In
                      contrast, the return on stocks in individual years has
                      varied from a low of -43.3% to a high of +53.9%,
                      reflecting the short-term volatility of stock prices.
 
                      However, the Portfolio is expected to exhibit somewhat
                      less volatility than the stock market as a whole.
                      Historically, utility stocks have been one of the least
                      volatile sectors of the stock market (when measured by
                      such statistics as standard deviation of returns or
                      industry "beta"). Moreover, the Portfolio's investment in
                      utility bonds is expected to further dampen the stock
                      market's influence on the Portfolio.
 
INTEREST RATE RISK
MAY BE SUBSTANTIAL    In addition to stock market risk, utility stocks and bonds
                      are also subject to INTEREST RATE RISK -- price
                      fluctuations due to changing market interest rates. In
                      general, fixed-income investments, such as bonds, vary
                      inversely with interest rates, falling in price when
                      interest rates rise, and rising in price when interest
                      rates fall. Utility stocks, more so than other stock
                      market sectors, are often influenced by these trends in
                      interest rates, rather than price movements in the stock
                      market. At the same time, the Portfolio's bond holdings
                      are subject to interest rate risk. This combination of
                      interest rate-sensitive stocks and bonds means that the
                      Portfolio may at times move in tandem with the bond
                      market, rising and falling as interest rates change,
                      independent of the stock market.
 
INVESTORS ARE EXPOSED
TO INDUSTRY RISK      In addition to stock market and interest rate risk, the
                      Portfolio is subject to INDUSTRY RISK -- i.e., the
                      possibility that a particular group of related stocks will
                      decline in price due to industry-specific developments.
 
                      Changing regulation constitutes one of the key industry
                      specific risks for the Portfolio. Regulators (largely at
                      the state level) monitor and control utility revenues and
                      costs, and therefore may limit utility profits and
                      dividends paid to investors. Regulatory authorities may
                      also restrict a company's access to new markets, thereby
                      diminishing the firm's long-term prospects. Individual
                      sectors of the utility market are subject to the following
                      additional risks:
 
                      - Electric utilities may be burdened by unexpected
                        increases in fuel and other operating costs. They are
                        also adversely affected when long-term interest rates
                        rise. Long-term borrowings are used to finance most
                        utility investment, and rising interest rates lead to
                        higher financing costs and reduced earnings. There are
                        also the considerable costs associated with
                        environmental compliance, nuclear waste clean-up, and
                        safety regulation. Increasingly, electric utilities are
                        being called upon by regulators to bear these added
                        costs, and there is a risk that these costs will not be
                        fully recovered through an increase in revenues.
 
   
                      - Telephone Utilities have been affected by technological
                        development leading to increased competition, as well as
                        changing regulation of long-distance telephone service
                        and other telecommunications businesses. While certain
                        companies have benefitted from the new competitive
                        climate, others have not, and increased competition in
                        the future may hinder the growth of more
                        traditionally-oriented telephone companies.
    
 
                                        5
<PAGE>   40
 
                      - Among gas transmission and distribution companies, there
                        has been a move to diversify into oil and gas
                        exploration and development, making investment returns
                        more sensitive to energy prices. In the case of the
                        water utility sector, the industry is highly fragmented,
                        and most water supply companies find themselves in
                        mature markets, with little potential for growth.
 
THE PORTFOLIO IS
SUBJECT TO MANAGER
RISK                  In addition to the risks described above, the Portfolio is
                      subject to MANAGER RISK. The investment adviser manages
                      the Portfolio according to the traditional methods of
                      "active" investment management, which involve the buying
                      and selling of securities based upon economic, financial
                      and market analysis and investment judgment. Manager risk
                      refers to the possibility that the Portfolio's investment
                      adviser may fail to execute the Portfolio's investment
                      strategy effectively. As a result, the Portfolio may fail
                      to achieve its stated objective.
 
FOREIGN SECURITIES
ENTAIL CURRENCY AND
OTHER RISKS           Since the Portfolio may invest in foreign securities,
                      investors are also exposed to the unique risks of
                      international investing. For U.S. investors, the returns
                      of foreign securities are influenced by not only the
                      returns on foreign common stocks themselves, but also by
                      CURRENCY RISK -- i.e., changes in the value of the
                      currencies in which the stocks are denominated. In a
                      period when the U.S. dollar rises against foreign
                      currencies, the returns on foreign stocks for a U.S.
                      investor are diminished. By contrast, in a period when the
                      U.S. dollar declines, the returns on foreign stocks are
                      enhanced.
 
                      Other risks and considerations of international investing
                      include the following: differences in accounting, auditing
                      and financial reporting standards; generally higher
                      commission rates on foreign portfolio transactions; the
                      smaller trading volumes and generally lower liquidity of
                      foreign stock markets, which may result in greater price
                      volatility; foreign withholding taxes payable on a
                      Portfolio's foreign securities, which may reduce dividend
                      income payable to shareholders; the possibility of
                      expropriation or confiscatory taxation; adverse changes in
                      investment or exchange control regulations; political
                      instability which could affect U.S. investment in foreign
                      countries; difficulty in obtaining and enforcing foreign
                      court judgments; and potential restrictions on the flow of
                      international capital.
 
   
YIELDS AND
RETURNS RELATIVE
TO THE BROAD STOCK
MARKET WILL VARY      Investors in the Portfolio should be aware that while
                      utility stocks have historically provided above-average
                      dividend yields, there is no guarantee that they will
                      continue to do so in the future. For example, as of
                      January 31, 1997, the Standard & Poor's Utility Index,
                      which includes electric, gas and water utilities, provided
                      a current yield of 4.7%, and the Standard & Poor's
                      Telephone Index, which is comprised of telephone
                      utilities, provided a current yield of 4.0%. In contrast,
                      the broad stock market (as measured by the Standard &
                      Poor's 500 Index) yielded 1.9%. Many of the risks
                      enumerated above have made it increasingly difficult for
                      utility companies to sustain such generous dividend
                      pay-outs, and future dividend yields of the utility sector
                      could decline.
    
 
   
                      Similarly, while utilities stocks may outperform the broad
                      stock market for certain periods, investors should not
                      anticipate long-term outperformance by utilities
                      securities because of their generally limited growth
                      prospects.
    
   
- --------------------------------------------------------------------------------
    
 
                                        6
<PAGE>   41
 
WHO SHOULD
INVEST
INVESTORS SEEKING AN
INCOME-ORIENTED STOCK
INVESTMENT            The Utilities Income Portfolio is designed for investors
                      who are seeking a more conservative, income-oriented stock
                      market investment. The Portfolio is likely to offer higher
                      dividend yields than the stock market average, with
                      substantially lower volatility in share price. The
                      Portfolio may also offer modest growth in income and
                      capital over time. Nonetheless, because utility stock and
                      bond prices will fluctuate, sometimes substantially,
                      investors should be willing to accept moderate to high
                      fluctuations in principal value. Because of the risks
                      associated with common stock and bond investments, the
                      Portfolio is intended to be a long-term investment vehicle
                      and is not designed to provide investors with a means of
                      speculating on short-term common stock and bond market
                      movements. Investors who engage in excessive account
                      activity generate additional costs which are borne by all
                      of the Portfolio shareholders. In order to minimize such
                      costs the Portfolio has adopted the following policies.
                      The Portfolio reserves the right to reject any purchase
                      request (including exchange purchases from other Vanguard
                      portfolios) that is reasonably deemed to be disruptive to
                      efficient portfolio management, either because of the
                      timing of the investment or previous excessive trading by
                      the investor. Additionally, the Portfolio has adopted
                      exchange privilege limitations as described in the section
                      "Exchange Privilege Limitations." Finally, the Portfolio
                      reserves the right to suspend the offering of its shares.
 
   
                      There can be no assurance that the Portfolio will achieve
                      its stated objective. Shareholders will be exposed to the
                      substantial risks inherent in equity investing. Investors
                      may wish to reduce the potential risk of investing in the
                      Portfolio by purchasing shares on a periodic basis
                      (dollar-cost averaging) rather than investing in one lump
                      sum.
    
 
                      Since the Portfolio concentrates its holdings in equity
                      securities of companies in the utilities industry, the
                      Portfolio should not be considered a complete investment
                      program. Most investors should maintain diversified
                      holdings of securities with different risk characteristics
                      -- including common stocks, bonds and money market
                      instruments.
                      ----------------------------------------------------------
 
IMPLEMENTATION OF
POLICIES              The Portfolio follows a number of investment practices in
                      an effort to achieve its objective of long-term capital
                      growth.
 
THE PORTFOLIO INVESTS
IN A RANGE OF UTILITY
STOCKS AND BONDS      The Portfolio invests in equity and debt securities of
                      companies engaged in the generation, transmission, or
                      distribution of electricity, telecommunications, gas, or
                      water. Such investments will be selected on the basis of
                      fundamental analysis to identify those securities that the
                      adviser believes will provide both current income and the
                      potential for growth in income and capital over time.
 
   
                      The Portfolio's primary investments will be drawn from two
                      sectors of the stock market: utilities and telephones.
                      (Prior to mid-1996, these sectors were combined within the
                      utility sector of the Standard & Poor's 500 Composite
                      Stock Index.) The market for utility bonds is dominated by
                      telephone and electric utility issuers. For example, as of
                      January 31, 1997, telephone company bonds represented 54%
                      of the outstanding utility bonds rated A or better
                      (measured in terms of market value by the Lehman Brothers
                      Investment Grade Utility Bond Index). Electric utility
                      issues
    
 
                                        7
<PAGE>   42
 
   
                      accounted for 26% of A-or-better utility bonds, while gas,
                      water and other utilities represented the remaining 20%.
    
 
                      Historically, utilities have been subject to strict
                      regulatory oversight. However, in recent years, changes in
                      the regulatory climate have allowed utilities to provide
                      products and services outside their traditional geographic
                      areas, leading to increased competition and expanded
                      prospects for growth. The Portfolio seeks to take
                      advantage of favorable opportunities that are expected to
                      arise from these structural changes in regulation.
 
   
THE PORTFOLIO MAY
HOLD FOREIGN
SECURITIES            The Portfolio may invest up to 30% of its equity assets in
                      foreign securities. Such a policy expands the investment
                      opportunities available to the Portfolio and may result in
                      improved diversification and performance.
    
 
                      All or a portion of the foreign securities purchased by
                      the Portfolio may be in the form of American Depository
                      Receipts (ADRs) or European Depository Receipts (EDRs).
                      ADRs are receipts typically issued by a U.S. bank or trust
                      company that evidence ownership of underlying securities
                      issued by a foreign corporation. EDRs are receipts issued
                      in Europe that evidence a similar ownership arrangement.
                      Generally, ADRs are designed for trading in the United
                      States securities markets and EDRs are designed for
                      trading in European securities markets.
 
THE PORTFOLIO MAY
ENTER INTO FORWARD
CURRENCY CONTRACTS    The Portfolio may enter into forward foreign currency
                      exchange contracts in order to protect against uncertainty
                      in the level of future foreign exchange rates in the
                      purchase and sale of investment securities. The Portfolio
                      may not enter into such contracts for speculative
                      purposes.
 
                      A forward foreign currency exchange contract is an
                      obligation to purchase or sell a specific currency at a
                      future date, which may be any fixed number of days from
                      the date of the contract agreed upon by the parties, at a
                      price set at the time of the contract. These contracts
                      may be bought or sold to protect the Portfolio to a
                      limited extent against adverse changes in exchange rates
                      between foreign currencies and the U.S. dollar. Such
                      contracts, which protect the value of the Portfolio's
                      investment securities against a decline in the value of a
                      currency, do not eliminate fluctuations in the underlying
                      prices of the securities. They simply establish an
                      exchange rate at a future date. Also, although such
                      contracts tend to minimize the risk of loss due to a
                      decline in the value of the hedged currency, at the same
                      time they tend to limit any potential gain that might be
                      realized should the value of such currency increase.
 
THE PORTFOLIO MAY
INVEST IN SHORT-TERM
FIXED INCOME
SECURITIES            The Portfolio may invest temporarily in certain short-term
                      fixed income securities. Such securities may be used to
                      invest uncommitted cash balances, to maintain liquidity to
                      meet shareholder redemptions, or to take a temporary
                      defensive position against potential stock market
                      declines. These securities include: obligations of the
                      United States Government and its agencies or
                      instrumentalities; commercial paper, bank certificates of
                      deposit, and bankers' acceptances; and repurchase
                      agreements collateralized by these securities.
 
                                        8
<PAGE>   43
 
                      The use of repurchase agreements involves certain risks,
                      including the risk of losses caused by the default or
                      insolvency of the other party to the agreement. However,
                      the Portfolio expects that it can control this risk
                      through careful evaluation of the creditworthiness of the
                      other party to any repurchase agreement and careful
                      monitoring procedures.
 
   
DERIVATIVE INVESTING  Derivatives are instruments whose values are linked to or
                      derived from an underlying security or index. The most
                      common and conventional types of derivative securities are
                      futures and options.
    
 
THE FUND MAY INVEST
IN DERIVATIVE
SECURITIES            The Fund may invest in futures contracts and options, but
                      only to a limited extent. Specifically, a Portfolio of the
                      Fund may enter into futures contracts provided that not
                      more than 5% of its assets are required as a futures
                      contract deposit; in addition, a Portfolio may enter into
                      futures contracts and options transactions only to the
                      extent that obligations under such contracts or
                      transactions represent not more than 20% of the
                      Portfolio's assets.
 
                      Futures contracts and options may be used for several
                      common fund management strategies; to maintain cash
                      reserves while simulating full investment, to facilitate
                      trading, to reduce transaction costs, or to seek higher
                      investment returns when a specific futures contract is
                      priced more attractively than other futures contracts or
                      the underlying security or index.
 
                      The Portfolio may use futures contracts for bona fide
                      "hedging" purposes. In executing a hedge, a manager sells,
                      for example, stock index futures to protect against a
                      decline in the stock market. As such, if the market drops,
                      the value of the futures position will rise, thereby
                      offsetting the decline in value of the Portfolio's stock
                      holdings.
 
FUTURES CONTRACTS
AND OPTIONS POSE
CERTAIN RISKS         The primary risks associated with the use of futures
                      contracts and options are: (i) imperfect correlation
                      between the change in market value of the stocks held by a
                      Portfolio and the prices of futures contracts and options;
                      and (ii) possible lack of a liquid secondary market for a
                      futures contract and the resulting inability to close a
                      futures position prior to its maturity date. The risk of
                      imperfect correlation will be minimized by investing in
                      those contracts whose price fluctuations are expected to
                      resemble those of the Portfolio's underlying securities.
                      The risk that the Portfolio will be unable to close out a
                      futures position will be minimized by entering into such
                      transactions on a national exchange with an active and
                      liquid secondary market.
 
                      The risk of loss in trading futures contracts in some
                      strategies can be substantial due both to the low margin
                      deposits required and the extremely high degree of
                      leveraging involved in futures pricing. As a result, a
                      relatively small price movement in a futures contract may
                      result in immediate and substantial loss or gain. However,
                      the Portfolio will not use futures contracts or options
                      for speculative purposes.
 
THE PORTFOLIO MAY
LEND ITS SECURITIES   The Portfolio may lend its investment securities on a
                      short-term or long-term basis to qualified institutional
                      investors for the purpose of realizing additional income.
                      With any loan of portfolio securities, there is a risk
                      that the borrowing institution will fail to redeliver the
                      securities when due. However, loans of securities by the
 
                                        9
<PAGE>   44
 
                      Portfolio will be collateralized by cash, letters of
                      credit, or securities issued or guaranteed by the U.S.
                      Government or its agencies. The collateral will equal at
                      least 100% of the current market value of the loaned
                      securities.
 
THE PORTFOLIO MAY
BORROW MONEY          The Portfolio may borrow money, subject to the limits set
                      forth below, for temporary or emergency purposes,
                      including the meeting of redemption requests which might
                      otherwise require the untimely disposition of securities.
 
PORTFOLIO TURNOVER IS
NOT EXPECTED TO
EXCEED 100%           Although it generally seeks to invest for the long term,
                      the Portfolio retains the right to sell securities
                      irrespective of how long they have been held. It is
                      anticipated that the annual portfolio turnover of the
                      Portfolio will not exceed 100%. A turnover rate of 100%
                      would occur, for example, if all of the securities held by
                      the Portfolio were replaced within one year.
- --------------------------------------------------------------------------------
 
INVESTMENT
LIMITATIONS
THE FUND HAS ADOPTED
CERTAIN FUNDAMENTAL
LIMITATIONS           The Portfolio has adopted certain limitations designed to
                      reduce its exposure to specific situations. Some of these
                      limitations are that the Portfolio will not:
 
   
                      (a) with respect to 75% of the value of its total assets,
                          invest more than 5% of its assets in the securities of
                          any single company or purchase more than 10% of the
                          voting securities of any issuer (except for securities
                          issued or guaranteed by the U.S. Government or any of
                          its agencies or instrumentalities);
    
   
                      (b) borrow money, except from banks (or through reverse
                          repurchase agreements) for temporary or emergency (not
                          leveraging) purposes, and then not in an amount
                          exceeding 15% of the value of the Fund's net assets at
                          the time the borrowing is made. Whenever borrowing
                          exceeds 5% of the value of the Fund's net assets, the
                          Fund will not make any additional investments;
    
   
                      (c) engage in the business of underwriting securities
                          issued by other persons, except to the extent that the
                          Portfolio may technically be deemed to be an
                          underwriter under the Securities Act of 1933, as
                          amended, in disposing of investment securities;
    
   
                      (d) purchase or otherwise acquire any security if, as a
                          result, more than 15% of its net assets would be
                          invested in securities that are illiquid; and
    
   
                      (e) make loans except (i) by purchasing bonds, debentures
                          or similar obligations (including repurchase
                          agreements) which are either publicly distributed or
                          customarily purchased by institutional investors, and
                          (ii) by lending its securities to banks, brokers,
                          dealers and other financial institutions so long as
                          such loans are not inconsistent with the Investment
                          Company Act or the Rules and Regulations or
                          interpretations of the Commission thereunder and the
                          aggregate value of all securities loaned does not
                          exceed 33 1/3% of the market value of the Portfolio's
                          total assets.
    
 
                      These investment limitations are considered at the time
                      investment securities are purchased. The limitations
                      described here and in the Statement of Additional
                      Information are fundamental and so may be changed only
                      with the approval of a majority of the Portfolio's
                      shareholders.
- --------------------------------------------------------------------------------
 
                                       10
<PAGE>   45
 
   
MANAGEMENT OF
THE PORTFOLIO

VANGUARD ADMINISTERS
AND DISTRIBUTES THE
PORTFOLIO             The Portfolio is one of five Portfolio's of Vanguard
                      Specialized Portfolios, Inc. (the "Fund"), a member of The
                      Vanguard Group of Investment Companies, a family of more
                      than 30 investment companies with more than 90 distinct
                      investment portfolios and total assets in excess of $260
                      billion. Through their jointly-owned subsidiary, The
                      Vanguard Group, Inc. ("Vanguard"), the Fund and the other
                      funds in the Group obtain at cost virtually all of their
                      corporate management, administrative and distribution
                      services. Vanguard also provides investment advisory
                      services on an at-cost basis to certain Vanguard funds. As
                      a result of Vanguard's unique corporate structure, the
                      Vanguard funds have costs substantially lower than those
                      of most competing mutual funds. In 1996, the average
                      expense ratio (annual costs including advisory fees
                      divided by total net assets) for the Vanguard funds
                      amounted to approximately .29% compared to an average of
                      1.22% for the mutual fund industry (data provided by
                      Lipper Analytical Services).
    
 
                      The Officers of the Portfolio manage the day-to-day
                      operations of the Portfolio and are responsible to the
                      Portfolio's Board of Directors. The Directors set broad
                      policies for the Portfolio and choose its Officers. A list
                      of the Directors and Officers of the Portfolio and a
                      statement of their present positions and principal
                      occupations during the past five years can be found in the
                      Statement of Additional Information.
 
                      Vanguard employs a supporting staff of management and
                      administrative personnel needed to provide the requisite
                      services to the funds and also furnishes the funds with
                      necessary office space, furnishings and equipment. Each
                      fund pays its share of Vanguard's net expenses, which are
                      allocated among the funds under methods approved by the
                      Board of Directors (Trustees) of each fund. In addition,
                      each fund bears its own direct expenses, such as legal,
                      auditing and custodian fees.
 
                      Vanguard provides distribution and marketing services to
                      the funds. The funds are available on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
                      However, each fund bears its share of the Group's
                      distribution costs.
- --------------------------------------------------------------------------------
 
   
INVESTMENT
ADVISER

WELLINGTON
MANAGEMENT
COMPANY, LLP
MANAGES INVESTMENTS
FOR THE PORTFOLIO     Under an investment advisory agreement with the Fund,
                      Wellington Management Company, LLP ("WMC"), 75 State
                      Street, Boston, MA 02109, manages the investment and
                      reinvestment of the assets of the Utilities Income
                      Portfolio, and continuously reviews, supervises and
                      administers the Portfolio's investment program. WMC
                      discharges its responsibilities subject to the control of
                      the Officers and Directors of the Fund.
    
 
   
                      WMC is a professional investment advisory firm which
                      globally provides services to investment companies,
                      institutions and individuals. Among the clients of WMC are
                      more than 10 of the investment companies of The Vanguard
                      Group. As of January 31, 1997, WMC held discretionary
                      management authority with respect to more than $133
                      billion of assets. WMC and its predecessor organizations
                      have provided advisory services to investment companies
                      since 1933 and to investment counseling clients since
                      1960.
    
 
   
                      Mark J. Beckwith, Vice President of WMC, is portfolio
                      manager of the Utilities Income Portfolio. Mr. Beckwith,
                      who has served on the Portfolio's investment team
    
 
                                       11
<PAGE>   46
 
   
                      since 1995, has more than ten years investment experience.
                      Mr. Beckwith is assisted by Earl E. McEvoy, Senior Vice
                      President of WMC, who manages the Portfolio's fixed-income
                      investments. Mr. McEvoy has served as portfolio manager of
                      the Utilities Income Portfolio since April 1997, and has
                      been an investment professional with WMC since 1979. Mr.
                      McEvoy replaces Paul D. Kaplan, who managed the
                      Portfolio's fixed-income investments from its inception in
                      May 1992. WMC's portfolio managers are supported by
                      research and other investment services provided by the
                      professional staff of WMC.
    
 
                      Under the Fund's investment advisory agreement, the fee
                      paid to WMC is based on the total assets of the Utilities
                      Income Portfolio and the total assets of two other
                      Portfolios of Vanguard Specialized Portfolios, Inc.
                      managed by WMC (the Energy and Health Care Portfolios).
                      The three Portfolios are required to pay WMC an aggregate
                      fee at the end of the fiscal quarter, calculated by
                      applying the following annual percentage rates to the
                      average month-end net assets for the quarter of the three
                      Portfolios:
 
<TABLE>
<CAPTION>
                                       NET ASSETS                            RATE
                                       <S>                                  <C>
                                       -------------------                  ------
                                       First $500 million                   0.150%
                                       Next $500 million                    0.125%
                                       Next $1 billion                      0.100%
                                       Next $1 billion                      0.075%
                                       Over $3 billion                      0.050%
</TABLE>
 
                      In addition, once the advisory fee to WMC is calculated
                      for the three Portfolios under this schedule, the total
                      fee will be reduced in order that the advisory fee paid by
                      the Utilities Income Portfolio does not exceed 0.08%.
 
   
                      The advisory fee is based on the total assets for the
                      three Portfolios and is allocated, except as noted above,
                      to each Portfolio based on the net assets of each. For
                      the fiscal year ended January 31, 1997, the investment
                      advisory fee represented an effective annual rate of .08
                      of 1% of average net assets for the Utilities Income
                      Portfolio. This fee was paid pursuant to the terms of a
                      previous investment advisory agreement, which called for a
                      higher rate of fees.
    
 
                      The investment advisory agreement with WMC authorizes the
                      adviser to select brokers or dealers to execute purchases
                      and sales of the Portfolio's securities, and direct the
                      advisers to use their best efforts to obtain the best
                      available price and most favorable execution with respect
                      to all transactions. The full range and quality of
                      brokerage services are considered in making these
                      determinations.
 
                      The Portfolio has authorized WMC to pay higher commissions
                      in recognition of brokerage services felt necessary for
                      the achievement of better execution, provided the adviser
                      believes this to be in the best interest of the Portfolio.
                      Although the Portfolio does not market its shares through
                      intermediary brokers or dealers, the Portfolio may place
                      orders with qualified broker-dealers who recommend the
                      Portfolio to clients if the Officers of the Fund believe
                      that the quality of the
 
                                       12
<PAGE>   47
 
                      transaction and the commission are comparable to what they
                      would be with other qualified brokerage firms.
 
                      The Portfolio's Board of Directors may, without the
                      approval of shareholders, provide for: (a) the employment
                      of a new investment adviser pursuant to the terms of a new
                      advisory agreement, either as a replacement for an
                      existing adviser or as an additional adviser; (b) a change
                      in the terms of an advisory agreement; and (c) the
                      continued employment of an existing adviser on the same
                      advisory contract terms where a contract has been assigned
                      because of a change in control of the adviser. Any such
                      change will only be made upon not less than 30 days' prior
                      written notice to shareholders of the Portfolio which
                      shall include substantially the information concerning the
                      adviser that would have normally been included in a proxy
                      statement.
- --------------------------------------------------------------------------------
 
DIVIDENDS,
CAPITAL GAINS
AND TAXES

THE UTILITIES INCOME
PORTFOLIO PAYS
QUARTERLY DIVIDENDS   The Utilities Income Portfolio pays dividends consisting
                      of ordinary income on a quarterly basis. Capital gains
                      distributions, if any, are made annually.
 
                      Dividend and capital gains distributions may be
                      automatically reinvested or received in cash. See
                      "Choosing a Distribution Option" for a description of
                      these distribution methods.
 
                      In order to satisfy certain distribution requirements of
                      the Tax Reform Act of 1986, the Portfolio may declare
                      year-end dividend and capital gains distributions during
                      December. Such distributions, if received by shareholders
                      by January 31, are deemed to have been paid by the
                      Portfolio and received by shareholders on December 31 of
                      the prior year.
 
                      The Portfolio intends to continue to qualify for taxation
                      as a "regulated investment company" under the Internal
                      Revenue Code so that the Portfolio will not be subject to
                      federal income tax to the extent its income is distributed
                      to shareholders. Dividends paid by the Portfolio from net
                      investment income, whether received in cash or reinvested
                      in additional shares, will be taxable to shareholders as
                      ordinary income. For corporate investors, dividends from
                      net investment income will generally qualify in part for
                      the intercorporate dividends-received deduction. However,
                      the portion of the dividends so qualified depends on the
                      aggregate taxable qualifying dividend income received by
                      the Portfolio from domestic (U.S.) sources.
 
                      Distributions paid by the Portfolio from long-term capital
                      gains, whether received in cash or reinvested in
                      additional shares, are taxable as long-term capital gains,
                      regardless of the length of time you have owned shares in
                      the Portfolio. Capital gains distributions are made when
                      the Portfolio realizes net capital gains on sales of
                      portfolio securities during the year. The Portfolio does
                      not seek to realize any particular amount of capital gains
                      during a year; rather, realized gains are a by-product of
                      portfolio management activities. Consequently, capital
                      gains distributions may be expected to vary considerably
                      from year to year; there will be no capital gains
                      distributions in years when the Portfolio realizes net
                      capital losses.
 
                      Note that if you accept capital gains distributions in
                      cash, instead of reinvesting them in additional shares,
                      you are in effect reducing the capital at work for you in
                      the Portfolio. Also, keep in mind that if you purchase
                      shares in a Portfolio shortly
 
                                       13
<PAGE>   48
 
                      before the record date for a dividend or capital gains
                      distribution, a portion of your investment will be
                      returned to you as a taxable distribution, regardless of
                      whether you are reinvesting your distributions or
                      receiving them in cash.
 
                      The Portfolio will notify you annually as to the tax
                      status of dividend and capital gains distributions paid by
                      the Portfolio.
 
A CAPITAL GAIN OR
LOSS MAY BE REALIZED
UPON EXCHANGE OR
REDEMPTION            A sale of shares of the Portfolio is a taxable event and
                      may result in a capital gain or loss. A capital gain or
                      loss may be realized from an ordinary redemption of shares
                      or an exchange of shares between two mutual funds (or two
                      portfolios of a mutual fund).
 
                      Dividend distributions, capital gains distributions, and
                      capital gains or losses from redemptions and exchanges may
                      be subject to state and local taxes.
 
                      The Fund is required to withhold 31% of taxable dividends,
                      capital gains distributions, and redemptions paid to
                      shareholders who have not complied with IRS taxpayer
                      identification regulations. You may avoid this withholding
                      requirement by certifying on your Account Registration
                      Form your proper Social Security or Employer
                      Identification number and by certifying that you are not
                      subject to backup withholding.
 
                      The Portfolio has obtained a Certificate of Authority to
                      do business as a foreign corporation in Pennsylvania and
                      does business and maintains an office in that state. In
                      the opinion of counsel, the shares of the Portfolio are
                      exempt from Pennsylvania personal property taxes.
 
                      The tax discussion set forth above is included for general
                      information only. Prospective investors should consult
                      their own tax advisers concerning the tax consequences of
                      an investment in the Fund.
- --------------------------------------------------------------------------------
 
   
THE SHARE PRICE
OF THE PORTFOLIO      Each Portfolio's share price or "net asset value" per
                      share is calculated by dividing the total assets of the
                      Portfolio, less all liabilities, by the total number of
                      shares outstanding. The net asset value is determined as
                      of the close of the New York Stock Exchange (generally
                      4:00 p.m. Eastern time) on each day that the Exchange is
                      open for trading.
    
 
                      Securities listed on a U.S. exchange are valued at the
                      latest quoted sales prices on the day the valuation is
                      made. Securities listed on a U.S. exchange that are not
                      traded on the valuation date are valued at the mean of the
                      bid and ask prices. The values of foreign securities held
                      by each Portfolio are typically determined as of the close
                      of trading of foreign securities in their respective
                      markets. If events which materially affect the value of a
                      Portfolio's investments occur after the close of the
                      securities markets on which such securities are primarily
                      traded, those investments will be priced at "fair value".
                      All prices of listed securities are taken from the
                      exchange where the security is primarily traded. Unlisted
                      securities for which market quotations are readily
                      available are valued at the latest quoted bid price.
                      Securities may be valued on the basis of prices provided
                      by a pricing service when such prices are believed to
                      reflect the fair market value of such securities. The
                      prices
 
                                       14
<PAGE>   49
 
                      provided by a pricing service may be determined without
                      regard to bid or last prices of each security but take
                      into account institutional size transactions in similar
                      groups of securities as well as any developments related
                      to specific securities. Other assets and securities for
                      which no market quotations are readily available are
                      valued in good faith at fair value using methods
                      determined by the Board of Directors of the Fund.
 
                      In determining the Portfolio's net asset value per share,
                      all assets and liabilities initially expressed in foreign
                      currencies will be converted into U.S. dollars using the
                      officially quoted daily exchange rates as determined by
                      Morgan Stanley Capital International (MSCI) in the
                      calculation of their various benchmarking indices. This
                      officially quoted exchange rate may be determined by MSCI
                      prior to or after the close of a particular foreign
                      securities market. If such quotations are not available,
                      the rate of exchange will be determined in accordance with
                      policies established in good faith by the Board of
                      Directors.
 
                      The Portfolio's share price can be found daily in the
                      mutual fund listings of most major newspapers under the
                      heading of Vanguard.
- --------------------------------------------------------------------------------
 
GENERAL
INFORMATION           The Portfolio is one of five Portfolios of Vanguard
                      Specialized Portfolios, Inc. (the "Fund"). The Fund is a
                      Maryland corporation. The Articles of Incorporation permit
                      the Directors to issue 6,000,000,000 shares of common
                      stock, with a $.001 par value. The Board of Directors has
                      the power to designate one or more classes ("Portfolios")
                      of shares of common stock and to classify or reclassify
                      any unissued shares with respect to such classes.
                      Currently the Fund is offering five classes of shares.
 
                      The shares of each Portfolio are fully paid and
                      non-assessable; have no preference as to conversion,
                      exchange, dividends, retirement or other features; and
                      have no preemptive rights. Such shares have non-cumulative
                      voting rights, meaning that the holders of more than 50%
                      of the shares voting for the election of Directors can
                      elect 100% of the Directors if they so choose.
 
                      Annual meetings of shareholders will not be held except as
                      required by the Investment Company Act of 1940 and other
                      applicable law. An annual meeting will be held to vote on
                      the removal of a Director or Directors of the Fund if
                      requested in writing by the holders of not less than 10%
                      of the outstanding shares of the Fund.
 
                      All securities and cash for the Utilities Income Portfolio
                      are held by State Street Bank and Trust Company, Boston,
                      MA. Core States Bank, N.A. Philadelphia, PA, holds daily
                      cash balances that are used by the Fund's Portfolios to
                      invest in repurchase agreements or securities acquired in
                      these transactions. The Vanguard Group, Inc., Valley
                      Forge, PA, serves as the Fund's Transfer and Dividend
                      Disbursing Agent. Price Waterhouse LLP, serves as
                      independent accountants for the Fund and will audit its
                      financial statements annually. The Fund is not involved in
                      any material litigation.
- --------------------------------------------------------------------------------
 
                                       15
<PAGE>   50
 
                               SHAREHOLDER GUIDE
 
   
OPENING AN
ACCOUNT AND
PURCHASING
SHARES                You may open a regular (non-retirement) account, either by
                      mail or wire. Simply complete and return an Account
                      Registration Form and any required documentation,
                      indicating the amount you wish to invest. Your purchase
                      must be equal to or greater than the $3,000 minimum
                      initial investment requirement for the Portfolio ($1,000
                      for Uniform Gifts/Transfers to Minors Act accounts). You
                      must open a new Individual Retirement Account by mail
                      (IRAs may not be opened by wire) using a Vanguard IRA
                      Adoption Agreement. Your purchase must be equal to or
                      greater than the $1,000 minimum initial investment
                      requirement for IRAs, but no more than $2,000 if you are
                      making a regular IRA contribution. Rollover contributions
                      are generally limited to the amount withdrawn within the
                      past 60 days from an IRA or other qualified Retirement
                      Plan. If you need assistance with the forms or have any
                      questions about the Portfolio, please call our Investor
                      Information Department (1-800-662-7447). NOTE: For other
                      types of account registrations (e.g., corporations,
                      associations, other organizations, trusts or powers of
                      attorney), please call us to determine which additional
                      forms you may need.
    
 
                      The Portfolio's shares are purchased at the
                      next-determined net asset value after your investment has
                      been received. The Portfolio is offered on a no-load basis
                      (i.e., there are no sales commissions or 12b-1 fees).
 
PURCHASE
RESTRICTIONS          1) Because of the risks associated with common stock and
                         bond investments, the Portfolio is intended to be a
                         long-term investment vehicle and is not designed to
                         provide investors with a means of speculating on
                         short-term stock and bond market movements.
                         Consequently, the Portfolio reserves the right to
                         reject any specific purchase (and exchange purchase)
                         request. The Portfolio also reserves the right to
                         suspend the offering of shares for a period of time.
 
                      2) Vanguard will not accept third-party checks to purchase
                         shares of the Fund. Please be sure your purchase check
                         is made payable to the Vanguard Group.
 
ADDITIONAL
INVESTMENTS           Subsequent investments to regular accounts may be made by
                      mail ($100 minimum), wire ($1,000 minimum), exchange from
                      another Vanguard Fund account ($100 minimum), or Vanguard
                      Fund Express. Subsequent investments to Individual
                      Retirement Accounts may be made by mail ($100 minimum) or
                      exchange from another Vanguard Fund account. In some
                      instances, contributions may be made by wire or Vanguard
                      Fund Express. Please call us for more information on these
                      options.
- --------------------------------------------------------------------------------
 
                                       16
<PAGE>   51
 
   
<TABLE>

<S>                       <C>                                       <C>
                                                                    ADDITIONAL INVESTMENTS
                          NEW ACCOUNT                               TO EXISTING ACCOUNTS
PURCHASING BY MAIL        Please include the amount of              Additional investments should
                          your initial investment on the            include the Invest-by-Mail
Complete and sign the     registration form, make your              remittance form attached to your
enclosed Account          check payable to The Vanguard             Fund confirmation statements.
Registration Form         Group - 57, and mail to:                  Please make your check payable
                                                                    to The Vanguard Group - 57,
                          VANGUARD FINANCIAL CENTER                 write your account number on
                          P.O. BOX 2600                             your check and, using the return
                          VALLEY FORGE, PA 19482-2600               envelope provided, mail to the
                                                                    address indicated on the In-
                                                                    vest-by-Mail Form.

For express or            VANGUARD FINANCIAL CENTER                 All written requests should be
registered mail,          455 DEVON PARK DRIVE                      mailed to one of the addresses
send to:                  WAYNE, PA 19087-1815                      indicated for new accounts. Do
                                                                    not send registered or express
                                                                    mail to the post office box
                                                                    address.
                          --------------------------------------------------------------------------
</TABLE>
    
 
PURCHASING BY WIRE                  CORESTATES BANK, N.A.
Money should be                     ABA 031000011
wired to:                           CORESTATES NO. 0101 9897
                                    ATTN VANGUARD

BEFORE WIRING                       VANGUARD SPECIALIZED PORTFOLIOS
Please contact                      UTILITIES INCOME PORTFOLIO
Client Services                     ACCOUNT NUMBER
(1-800-662-2739)                    ACCOUNT REGISTRATION
                                  
   
                      To ensure proper receipt, please be sure your bank
                      includes the Portfolio name, the account number Vanguard
                      has assigned to you and the eight-digit CoreStates number.
                      If you are opening a new account, please complete the
                      Account Registration Form and mail it to the "New Account"
                      address above after completing your wire arrangement.
                      NOTE: Federal Funds wire purchase orders will be accepted
                      only when the Fund and Custodian Bank are open for
                      business.
    
- --------------------------------------------------------------------------------
 
PURCHASING BY
EXCHANGE (from a
Vanguard account)     You may open a new account or purchase additional shares
                      by making an exchange from an existing Vanguard account.
                      However, the Portfolio reserves the right to refuse any
                      exchange purchase request. Call our Client Services
                      Department (1-800-662-2739). The new account will have the
                      same registration as the existing account.
- --------------------------------------------------------------------------------
 
   
PURCHASING BY
FUND EXPRESS
Special Purchase and
Automatic Investment  The Fund Express Special Purchase option lets you move
                      money from your bank account to your Vanguard account on
                      an "as needed" basis. Or if you choose the Automatic
                      Investment option, money will be moved automatically from
                      your bank account to your Vanguard account on the schedule
                      (monthly, bimonthly [every other month], quarterly,
                      semi-annually or annually) you select. To establish these
    
 
                                       17
<PAGE>   52
 
   
                      Fund Express options, please provide the appropriate
                      information on the Account Registration Form. We will send
                      you a confirmation of your Fund Express service; please
                      wait two weeks before using the service.
    
- --------------------------------------------------------------------------------
 
CHOOSING A
DISTRIBUTION
OPTION                You must select one of three distribution options:
 
   
                      1. AUTOMATIC REINVESTMENT OPTION -- Both dividend and
                         capital gain distributions will be reinvested in
                         additional Fund shares. This option will be selected
                         for you automatically unless you specify one of the
                         other options.
    
 
                      2. CASH DIVIDEND OPTION -- Your dividends will be paid in
                         cash and your capital gains will be reinvested in
                         additional Fund shares.
 
   
                      3. ALL CASH OPTION -- Both dividend and capital gain
                         distributions will be paid in cash.
    
 
                      In addition, an option to invest your cash dividends
                      and/or capital gains distributions in another Vanguard
                      Fund account is available. Please call our Client Services
                      Department (1-800-662-2739) for information. You may also
                      elect Vanguard Dividend Express which allows you to
                      transfer your cash dividends and/or capital gains
                      distributions automatically to your bank account. Please
                      see "Other Vanguard Services" for more information.
- --------------------------------------------------------------------------------
 
TAX CAUTION

INVESTORS SHOULD ASK
ABOUT THE TIMING OF
CAPITAL GAINS AND
DIVIDEND DISTRIBUTIONS
BEFORE INVESTING      Under Federal tax laws, the Portfolio is required to
                      distribute net capital gains and dividend income to
                      Portfolio shareholders. These distributions are made to
                      all shareholders who own Portfolio shares as of the
                      distribution's record date, regardless of how long the
                      shares have been owned. Purchasing shares just prior to
                      the record date could have a significant impact on your
                      tax liability for the year. For example, if you purchase
                      shares immediately prior to the record date of a sizable
                      capital gain or income dividend distribution, you will be
                      assessed taxes on the amount of the capital gain and/or
                      dividend distribution later paid even though you owned the
                      Portfolio shares for just a short period of time. (Taxes
                      are due on the distributions even if the dividend or gain
                      is reinvested in additional Portfolio shares.) While the
                      total value of your investment will be the same after the
                      distribution -- the amount of the distribution will offset
                      the drop in the net asset value of the shares -- you
                      should be aware of the tax implications the timing of your
                      purchase may have.
 
   
                      Prospective investors should, therefore, inquire about
                      potential distributions before investing. The Portfolio's
                      annual capital gains distribution normally occurs in
                      December, while income dividends are generally paid
                      quarterly in March, June, September and December. In
                      addition, the Portfolio may occasionally be required to
                      make supplemental dividend or capital gains distributions
                      at some other time during the year. For additional
                      information on distributions and taxes, see the section
                      titled "Dividends, Capital Gains, and Taxes."
    
- --------------------------------------------------------------------------------
 
                                       18
<PAGE>   53
 
IMPORTANT
INFORMATION

ESTABLISHING OPTIONAL
SERVICES              The easiest way to establish optional Vanguard services on
                      your account is to select the options you desire when you
                      complete your Account Registration Form. IF YOU WISH TO
                      ADD SHAREHOLDER OPTIONS LATER, YOU MAY NEED TO PROVIDE
                      VANGUARD WITH ADDITIONAL INFORMATION AND A SIGNATURE
                      GUARANTEE. PLEASE CALL OUR CLIENT SERVICES DEPARTMENT
                      (1-800-662-2739) FOR FURTHER ASSISTANCE.
 
SIGNATURE
GUARANTEES            For our mutual protection, we may require a signature
                      guarantee on certain written transaction requests. A
                      signature guarantee verifies the authenticity of your
                      signature and may be obtained from banks, brokers and any
                      other guarantor that Vanguard deems acceptable. A
                      SIGNATURE GUARANTEE CANNOT BE PROVIDED BY A NOTARY PUBLIC.
 
CERTIFICATES          Share certificates are not available for the Utilities
                      Income Portfolio.
 
BROKER-DEALER
PURCHASES             If you purchase shares in Vanguard Funds through a
                      registered broker-dealer or investment adviser, the
                      broker-dealer or adviser may charge a service fee.
 
CANCELLING TRADES     The Fund will not cancel any trade (e.g., a purchase,
                      exchange or redemption) believed to be authentic, received
                      in writing or by telephone, once the trade request has
                      been received.
 
   
ELECTRONIC
PROSPECTUS
DELIVERY              You may receive a prospectus for the Fund or any of the
                      Vanguard Funds in an electronic format. Please call
                      1-800-231-7870 for additional information or see "Other
                      Vanguard Services -- Computer Access." You may also
                      receive a paper copy of the prospectus, by calling
                      1-800-662-7447.
    
- --------------------------------------------------------------------------------
 
WHEN YOUR
ACCOUNT WILL BE
CREDITED              Your trade date is the date on which your account is
                      credited. If your purchase is made by check, Federal Funds
                      wire or exchange, and is received by the close of the New
                      York Stock Exchange (generally 4:00 p.m. Eastern time),
                      your trade date is the day of receipt. If your purchase is
                      received after the close of the Exchange, your trade date
                      is the next business day. Your shares are purchased at the
                      net asset value determined on your trade date.
 
                      In order to prevent lengthy processing delays caused by
                      the clearing of foreign checks, Vanguard will only accept
                      a foreign check which has been drawn in U.S. dollars and
                      has been issued by a foreign bank with a U.S.
                      correspondent bank. The name of the U.S. correspondent
                      bank must be printed on the face of the foreign check.
- --------------------------------------------------------------------------------
 
   
SELLING YOUR
SHARES                You may withdraw any portion of the funds in your account
                      by redeeming shares at any time. (Please see "Important
                      Redemption Information.") You generally may initiate a
                      request by writing or by telephoning. Your redemption
                      proceeds are normally mailed within two business days
                      after the receipt of the request in Good Order.
    
 
SELLING BY MAIL       Requests should be mailed to VANGUARD FINANCIAL CENTER,
                      VANGUARD SPECIALIZED PORTFOLIOS, P.O. BOX 1120, VALLEY
                      FORGE, PA 19482. (For express or registered mail, send
                      your request to Vanguard Financial Center, Vanguard
                      Specialized Portfolios, 455 Devon Park Drive, Wayne, PA
                      19087.)
 
                                       19
<PAGE>   54
 
                      The redemption price of shares will be the Portfolio's net
                      asset value next determined after Vanguard has received
                      all required documents in Good Order.
- --------------------------------------------------------------------------------
 
DEFINITION OF
GOOD ORDER            GOOD ORDER means that the request includes the following:
                      1. The account number and Portfolio name.
                      2. The amount of the transaction (specified in dollars or
                         shares).
                      3. The signatures of all owners EXACTLY as they are
                         registered on the account.
                      4. Any required signature guarantees.
                      5. Other supporting legal documentation that might be
                         required in the case of estates, corporations, trusts,
                         and certain other accounts.
 
                      IF YOU HAVE QUESTIONS ABOUT THIS DEFINITION AS IT PERTAINS
                      TO YOUR REQUEST, PLEASE CALL OUR CLIENT SERVICES
                      DEPARTMENT AT 1-800-662-2739.
- --------------------------------------------------------------------------------
 
   
SELLING BY
TELEPHONE             To sell shares by telephone you or your pre-authorized
                      representative may call our Client Services Department at
                      1-800-662-2739. The proceeds will be sent to you by mail.
                      PLEASE NOTE: As a protection against fraud, your telephone
                      mail redemption privilege will be suspended for 15
                      calendar days following any expedited address change to
                      your account. An expedited address change is one that is
                      made by telephone, or in writing, without the signatures
                      of all account owners. Please see "Important Information
                      About Telephone Transactions."
    
- --------------------------------------------------------------------------------
 
   
SELLING BY FUND
EXPRESS

AUTOMATIC
WITHDRAWAL
& SPECIAL REDEMPTION  If you select the Fund Express Automatic Withdrawal
                      option, money will be automatically moved from your
                      Vanguard Fund account to your bank account according to
                      the schedule you have selected. The Special Redemption
                      option lets you move money from your Vanguard account to
                      your bank account on an "as needed" basis. To establish
                      these Fund Express options, please provide the appropriate
                      information on the Account Registration Form. We will send
                      you a confirmation of your Fund Express service; please
                      wait two weeks before using the service.
    
- --------------------------------------------------------------------------------
 
SELLING BY
EXCHANGE              You may sell shares by making an exchange into another
                      Vanguard Fund account. Please see "Exchanging Your Shares"
                      for details.
- --------------------------------------------------------------------------------
 
IMPORTANT REDEMPTION
INFORMATION           Shares purchased by check or Fund Express may be redeemed
                      at any time. However, your redemption proceeds will not be
                      paid until payment for the purchase is collected, which
                      may take up to ten calendar days.
- --------------------------------------------------------------------------------
 
DELIVERY OF
REDEMPTION
PROCEEDS              Redemption requests received by telephone prior to the
                      close of the New York Stock Exchange (generally 4:00 p.m.
                      Eastern time) are processed on the day of receipt and the
                      redemption proceeds are normally sent on the following
                      business day.
 
                      Redemption requests received by telephone after the close
                      of the Exchange are processed on the business day
                      following receipt and the proceeds are normally sent on
                      the second business day following receipt.
 
                      Redemption proceeds must be sent to you within seven days
                      of receipt of your request in Good Order, except as
                      described above in "Important Redemption Information."
 
                                       20
<PAGE>   55
 
                      If you experience difficulty in making a telephone
                      redemption during periods of drastic economic or market
                      changes, your redemption request may be made by regular or
                      express mail. It will be implemented at the net asset
                      value next determined after your request has been received
                      by Vanguard in Good Order. The Fund reserves the right to
                      revise or terminate the telephone redemption privilege at
                      any time.
 
                      The Fund may suspend the redemption right or postpone
                      payment at times when the New York Stock Exchange is
                      closed or under any emergency circumstances as determined
                      by the United States Securities and Exchange Commission.
 
                      If the Board of Directors determines that it would be
                      detrimental to the best interests of the Fund's remaining
                      shareholders to make payment in cash, the Fund may pay
                      redemption proceeds in whole or in part by a distribution
                      in kind of readily marketable securities.
- --------------------------------------------------------------------------------
 
VANGUARD'S AVERAGE
COST STATEMENT        If you make a redemption from a qualifying account,
                      Vanguard will send you an Average Cost Statement which
                      provides you with the tax basis of the shares you
                      redeemed. Please see "Statement and Reports" for
                      additional information.
- --------------------------------------------------------------------------------
 
   
LOW-BALANCE FEE
AND MINIMUM ACCOUNT
BALANCE REQUIREMENT   Due to the relatively high cost of maintaining smaller
                      accounts, the Fund will automatically deduct a $10 annual
                      fee from non-retirement accounts with balances falling
                      below $2,500 ($500 for Uniform Gifts/Transfers to Minors
                      Act accounts). The fee generally will be waived for
                      investors whose aggregate Vanguard Assets exceed $50,000.
                      In addition, the Fund reserves the right to liquidate any
                      non-retirement account that is below the minimum initial
                      investment amount of $3,000. If at any time your total
                      investment does not have a value of at least $3,000, you
                      may be notified that your account is below the Fund's
                      minimum account balance requirement. You would then be
                      allowed 60 days to make an additional investment before
                      the account is liquidated. Proceeds would be promptly paid
                      to the registered shareholder.
    
 
                      Vanguard will not liquidate your account if it has fallen
                      below $3,000 solely as a result of declining markets
                      (i.e., a decline in a Portfolio's net asset value).
- --------------------------------------------------------------------------------
 
EXCHANGING YOUR
SHARES                Should your investment goals change, you may exchange your
                      shares of the Utilities Income Portfolio of Vanguard
                      Specialized Portfolios for those of other available
                      Vanguard Funds.
 
   
EXCHANGING BY
TELEPHONE
Call Client Services
(1-800-662-2739)      When exchanging shares by telephone, please have ready the
                      Portfolio name, account number, Social Security number or
                      employer identification number listed on the account, and
                      exact name and address in which the account is registered.
                      Only the registered shareholder or his or her
                      pre-authorized representative may complete such an
                      exchange. Requests for telephone exchanges received prior
                      to the close of trading on the New York Stock Exchange
                      (generally 4:00 p.m. Eastern time) are processed at the
                      close of business that same day. Requests received after
                      the close of the Exchange are processed the next business
                      day. FOR NON-RETIREMENT INVESTMENTS, TELEPHONE EXCHANGES
                      ARE NOT ACCEPTED INTO OR FROM VANGUARD BALANCED INDEX
                      FUND, VANGUARD INDEX TRUST, VANGUARD REIT INDEX PORTFOLIO,
                      VANGUARD INTERNATIONAL EQUITY INDEX FUND AND THE GROWTH
                      AND INCOME PORTFOLIO OF VANGUARD QUANTITA-
    
 
                                       21
<PAGE>   56
 
                      TIVE PORTFOLIOS. If you experience difficulty in making a
                      telephone exchange, your exchange request may be made by
                      regular or express mail, and it will be implemented at the
                      closing net asset value on the date received by Vanguard,
                      provided the request is received in Good Order.
- --------------------------------------------------------------------------------
 
EXCHANGING BY MAIL    Please be sure to include on your exchange request the
                      name and account number of your current Portfolio, the
                      name of the Fund you wish to exchange into, the amount you
                      wish to exchange, and the signatures of all registered
                      account holders. Send your request to VANGUARD FINANCIAL
                      CENTER, VANGUARD SPECIALIZED PORTFOLIOS, P.O. BOX 1120,
                      VALLEY FORGE, PA 19482. (For express or registered mail,
                      send your request to Vanguard Financial Center, Vanguard
                      Specialized Portfolios, 455 Devon Park Drive, Wayne, PA
                      19087.)
- --------------------------------------------------------------------------------
 
   
EXCHANGING ON-LINE    You may use your personal computer to exchange shares of
                      most Vanguard funds by accessing Vanguard's website
                      (http://www.vanguard.com). To establish this service on
                      your account, you must first register through our website.
                      We will then send to you by mail, an account access
                      password that will enable you to make on-line exchanges.
    
 
   
                      The Vanguard funds that you cannot purchase or sell
                      through on-line exchange are VANGUARD INDEX TRUST,
                      VANGUARD BALANCED INDEX FUND, VANGUARD INTERNATIONAL
                      EQUITY INDEX FUND, VANGUARD REIT INDEX PORTFOLIO, VANGUARD
                      TOTAL INTERNATIONAL PORTFOLIO, and VANGUARD GROWTH AND
                      INCOME PORTFOLIO (formerly known as Vanguard Quantitative
                      Portfolios). These funds do permit on-line exchanges
                      within IRAs and other retirement accounts.
    
- --------------------------------------------------------------------------------
 
IMPORTANT EXCHANGE
INFORMATION           Before you make an exchange, you should consider the
                      following:
 
   
                      - Please read the Fund's prospectus before making an
                        exchange. For a copy and for answers to any questions
                        you may have, call our Investor Information Department
                        (1-800-662-7447).
    
 
                      - An exchange is treated as a redemption and a purchase.
                        Therefore, you could realize a taxable gain or loss on
                        the transaction.
 
   
                      - Exchanges are accepted only if the registrations and
                        taxpayer identification numbers of the two accounts are
                        identical.
    
 
                      - The shares to be exchanged must be on deposit and not
                        held in certificate form.
 
   
                      - New accounts are not currently accepted in
                        Vanguard/Windsor Fund.
    
 
                      - The redemption price of shares redeemed by exchange is
                        the net asset value next determined after Vanguard has
                        received the required documentation in Good Order.
 
                      - When opening a new account by exchange, you must meet
                        the minimum investment requirement of the new Fund.
 
                      Every effort will be made to maintain the exchange
                      privilege. However, the Fund reserves the right to revise
                      or terminate its provisions, limit the amount of or reject
                      any exchange, as deemed necessary, at any time.
 
                                       22
<PAGE>   57
 
                      The Fund's exchange privilege is only available in states
                      in which the shares of the Fund are registered for sale.
                      The Fund's shares are currently registered for sale in all
                      50 states and the Fund intends to maintain such
                      registration.
- --------------------------------------------------------------------------------
 
EXCHANGE
PRIVILEGE
LIMITATIONS           The Fund's exchange privilege is not intended to afford
                      shareholders a way to speculate on short-term movements in
                      the market. Accordingly, in order to prevent excessive use
                      of the exchange privilege that may potentially disrupt the
                      management of the Fund and increase transaction costs, the
                      Fund has established a policy of limiting excessive
                      exchange activity.
 
                      Exchange activity generally will not be deemed excessive
                      if limited to THREE SUBSTANTIVE EXCHANGE REDEMPTIONS (AT
                      LEAST 30 DAYS APART) from the Portfolio during any
                      twelve-month period. Notwithstanding these limitations,
                      the Portfolio reserves the right to reject any purchase
                      request (including exchange purchases from other Vanguard
                      portfolios) that is reasonably deemed to be disruptive to
                      efficient portfolio management.
- --------------------------------------------------------------------------------
 
IMPORTANT
INFORMATION
ABOUT TELEPHONE
TRANSACTIONS          The ability to initiate redemptions (except wire
                      redemptions) and exchanges by telephone is automatically
                      established on your account unless you request in writing
                      that telephone transactions on your account not be
                      permitted.
 
                      To protect your account from losses resulting from
                      unauthorized or fraudulent telephone instructions,
                      Vanguard adheres to the following security procedures:
 
   
                      1. SECURITY CHECK.  To request a transaction by telephone,
                         the caller must know (i) the name of the Portfolio;
                         (ii) the 10-digit account number; (iii) the exact name
                         and address used in the registration; and (iv) the
                         Social Security or employer identification number
                         listed on the account.
    
 
                      2. PAYMENT POLICY.  The proceeds of any telephone
                         redemption by mail will be made payable to the
                         registered shareowner and mailed to the address of
                         record only.
 
   
                      Neither the Portfolio nor Vanguard will be responsible for
                      the authenticity of transaction instructions received by
                      telephone, provided that reasonable security procedures
                      have been followed. Vanguard believes that the security
                      procedures described above are reasonable, and that if
                      such procedures are followed, you will bear the risk of
                      any losses resulting from unauthorized or fraudulent
                      telephone transactions on your account.
    
- --------------------------------------------------------------------------------
 
TRANSFERRING
REGISTRATION          You may transfer the registration of any of your Fund
                      shares to another person by completing a transfer form and
                      sending it to: VANGUARD FINANCIAL CENTER, P.O. BOX 1110,
                      VALLEY FORGE, PA 19482, ATTENTION: TRANSFER DEPARTMENT.
                      The request must be in Good Order. TO REQUEST A TRANSFER
                      FORM AND FULL INSTRUCTIONS PLEASE CALL OUR CLIENT SERVICES
                      DEPARTMENT (1-800-662-2739).
- --------------------------------------------------------------------------------
 
STATEMENTS AND
REPORTS               Vanguard will send you a confirmation statement each time
                      you initiate a transaction in your account except for
                      checkwriting redemptions from Vanguard money market
                      accounts. You will also receive a comprehensive account
                      statement at
 
                                       23
<PAGE>   58
 
                      the end of each calendar quarter. The fourth quarter
                      statement will be a year-end statement, listing all
                      transaction activity for the entire calendar year.
 
   
                      Vanguard's Average Cost Statement provides you with the
                      average cost of shares redeemed from your account during
                      the calendar year, using the average cost single category
                      method. This service is available for most taxable
                      accounts opened since January 1, 1986. In general,
                      investors who redeemed shares from a qualifying Vanguard
                      account may expect to receive their Average Cost Statement
                      along with their Portfolio Summary Statement. Please call
                      our Client Services Department (1-800-662-2739) for
                      information.
    
 
                      Financial reports on the Fund will be mailed to you
                      semi-annually, according to the Fund's fiscal year-end.
- --------------------------------------------------------------------------------
 
OTHER VANGUARD
SERVICES              For more information about any of these services, please
                      call our Investor Information Department at
                      1-800-662-7447.
 
VANGUARD DIRECT
DEPOSIT SERVICE       With Vanguard's Direct Deposit Service, most U.S.
                      Government checks (including Social Security and military
                      pension checks) and private payroll checks may be
                      automatically deposited into your Vanguard Fund account.
                      Separate brochures and forms are available for direct
                      deposit of U.S. Government and private payroll checks.
 
VANGUARD AUTOMATIC
EXCHANGE SERVICE      Vanguard's Automatic Exchange Service allows you to move
                      money automatically among your Vanguard Fund accounts. For
                      instance, the service can be used to "dollar cost average"
                      from a money market portfolio into a stock or bond fund or
                      to contribute to an IRA or other retirement plan. Please
                      contact our Client Services Department at 1-800-662-2739
                      for additional information.
 
VANGUARD FUND
EXPRESS               Vanguard's Fund Express allows you to transfer money
                      between your Fund account and your account at a bank,
                      savings and loan association, or a credit union that is a
                      member of the Automated Clearing House (ACH) system. You
                      may elect this service on the Account Registration Form or
                      call our Investor Information Department (1-800-662-7447)
                      for a Fund Express application.
 
                      Special rules govern how your Fund Express purchases or
                      redemptions are credited to your account. In addition,
                      some services of Fund Express cannot be used with specific
                      Vanguard Funds. For more information, please refer to the
                      Vanguard Fund Express brochure.
 
VANGUARD DIVIDEND
EXPRESS               Vanguard's Dividend Express allows you to transfer your
                      dividends and/or capital gains distributions automatically
                      from your Fund account, one business day after the Fund's
                      payable date, to your account at a bank, savings and loan
                      association, or a credit union that is a member of the
                      Automated Clearing House (ACH) system. You may elect this
                      service on the Account Registration Form or call our
                      Investor Information Department (1-800-662-7447) for a
                      Vanguard Dividend Express application.
 
   
VANGUARD
TELE-ACCOUNT          Vanguard's Tele-Account is a convenient, automated service
                      that provides share price, price change and yield
                      quotations on Vanguard Funds through any TouchTone(TM)
                      telephone. This service also lets you obtain information
                      about your account balance, your last transaction, and
                      your most recent dividend or capital gains payment. In
                      addition, you may perform investment exchanges of Vanguard
    
 
                                       24
<PAGE>   59
 
   
                         Fund shares and redemptions by check using
                         Tele-Account. To contact Vanguard's Tele-Account
                         service, dial 1-800-ON-BOARD (1-800-662-6273). A
                         brochure offering detailed operating instructions is
                         available from our Investor Information Department
                         (1-800-662-7447).
    
 
   
COMPUTER ACCESS
    
 
   
VANGUARD ON THE
WORLD WIDE WEB
HTTP://WWW.VANGUARD.COM
                         Vanguard sponsors an education-oriented website
                         offering news and information about Vanguard Funds and
                         services, as well as interactive, easy-to-use
                         investment planning tools.
    
 
- --------------------------------------------------------------------------------
 
                                       25
<PAGE>   60
 
                     [THIS PAGE INTENTIONALLY LEFT BLANK.]
<PAGE>   61
 
                     [THIS PAGE INTENTIONALLY LEFT BLANK.]
<PAGE>   62
 
   
                     [THIS PAGE INTENTIONALLY LEFT BLANK.]
    
<PAGE>   63
 
                    [VANGUARD LOGO]                             [Flag Logo]
                      SPECIALIZED
                      PORTFOLIOS
                     -------------
                    UTILITIES INCOME
                       PORTFOLIO
                    -------------------------------
 
                    THE VANGUARD GROUP
                    Vanguard Financial Center
                    P.O. Box 2600
                    Valley Forge, PA 19482
 
                    INVESTOR INFORMATION
                     DEPARTMENT:
                    1-800-662-7447 (SHIP)
 
                    CLIENT SERVICES
                     DEPARTMENT:
                    1-800-662-2739 (CREW)
 
                    TELE-ACCOUNT FOR
                     24-HOUR ACCESS:
                    1-800-662-6273 (ON-BOARD)
 
                    TELECOMMUNICATION SERVICE
                     FOR THE HEARING-IMPAIRED:
                    1-800-662-2738
 
                    TRANSFER AGENT:
                    The Vanguard Group, Inc.
                    Vanguard Financial Center
                    Valley Forge, PA 19482
 


                                                  [VANGUARD LOGO]
                                                    SPECIALIZED
                                                    PORTFOLIOS
                                                  -------------
                                                 UTILITIES INCOME
                                                      PORTFOLIO

                                            P   R   O  S  P  E  C  T  U  S
 
   
                                                     MAY 30, 1997
    
 
                                                    [VANGUARD LOGO]
 
     P057
 
- --------------------------------------------------------------------------------
<PAGE>   64
                                                                    VANGUARD    
                                                                    REIT INDEX
                                                                    PORTFOLIO
                                                                    
   
                                                                    Prospectus
                                                                    May 30, 1997
    


- ----------
A Portfolio of Vanguard 
Specialized Portfolios
   

This prospectus 
contains financial data 
for the Portfolio through 
the period ended 
January 31, 1997.
    



[SHIP]


A member of
LOGO[THE VANGUARD GROUP]
<PAGE>   65
VANGUARD REIT INDEX PORTFOLIO                    A Real Estate Stock Mutual Fund

CONTENTS

Portfolio Expenses        2

Financial Highlights      3

A Word About Risk         4

The Portfolio's
Objectives                4

Who Should Invest         4

Investment Strategy       5

Investment Policies       8

Investment Limitations    9

Investment
Performance               9

Share Price              10

Distributions and Taxes  10

The Portfolio and
Vanguard                 12

Investment Adviser       12

General Information      12

Investing with
Vanguard                 13

Services and
Account Features         13

Types of Accounts        14

Distribution Options     15

Buying Shares            15

Redeeming Shares         17

Fund and Account Updates 20

Glossary  Inside Back Cover

INVESTMENT OBJECTIVES AND POLICIES

Vanguard REIT Index Portfolio (the "Portfolio") is a diversified mutual fund, a
part of Vanguard Specialized Portfolios, Inc. (the "Fund"), an open-end
investment company.

   The Portfolio seeks to provide a high level of income and moderate long-term
capital growth by investing at least 98% of its assets in stocks issued by real
estate investment trusts (known as "REITs"); these stocks make up the Morgan
Stanley REIT Index (the "Index"), a benchmark of U.S. property trusts. The
Portfolio's remaining assets are invested in cash reserves.

   IT IS IMPORTANT TO NOTE THAT THE PORTFOLIO'S SHARES ARE NOT GUARANTEED OR
INSURED BY THE FDIC OR ANY OTHER AGENCY OF THE U.S. GOVERNMENT. AS WITH ANY
INVESTMENT IN COMMON STOCKS, WHICH ARE SUBJECT TO WIDE FLUCTUATIONS IN MARKET
VALUE, YOU COULD LOSE MONEY BY INVESTING IN THE PORTFOLIO.

FEES AND EXPENSES

The Portfolio is offered on a no-load basis, which means that you pay no sales
commissions or 12b-1 marketing fees. You will, however, incur expenses for
investment advisory, management, administrative, and distribution services,
which are included in the expense ratio.

   The REIT Index Portfolio charges a 1% transaction fee if you redeem (that is,
sell or exchange) shares held less than one year.

   
ADDITIONAL INFORMATION ABOUT THE PORTFOLIO

A Statement of Additional Information (dated May 30, 1997) containing more
information about the Portfolio is, by reference, part of this prospectus and
may be obtained, along with other information about the Portfolio, without
charge by writing to Vanguard, calling our Investor Information Department at
1-800-662-7447, or visiting the Securities and Exchange Commission's website
(http://www.sec.gov).
    

WHY READING THIS PROSPECTUS IS IMPORTANT

This prospectus explains the objectives, risks, and strategy of the REIT Index
Portfolio. To highlight terms and concepts important to mutual fund investors,
we have provided "Plain Talk" explanations along the way. Reading the prospectus
will help you to decide whether the Portfolio is the right investment for you.
We suggest that you keep it for future reference. 

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE COMMISSION PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE. 
<PAGE>   66
PORTFOLIO PROFILE                                 Vanguard REIT Index Portfolio

WHO SHOULD INVEST (page 4)

- -  Investors looking for a simple, low-cost way to diversify their stock, bond,
   and cash investments with indirect exposure to real estate.

- -  Investors seeking a stock fund that offers the potential for above-average
   income. (Historically, the securities that comprise the Index have provided
   above-average income relative to the S&P 500 Index.)

- -  Investors wanting modest growth of their capital over the long term -- at
   least five years.

WHO SHOULD NOT INVEST

- -  Investors unwilling to accept significant fluctuations in share price.

- -  Investors seeking a mutual fund that invests in a variety of industries.

RISKS OF THE PORTFOLIO (pages 4 - 8)

The Portfolio's total return will fluctuate, so an investor could lose money
over short or even extended periods. The REIT Index Portfolio is subject to,
among other risks:

- -  Real estate industry risk (the chance that property values will fall due to a
   variety of factors, such as a decline in rental rates).

- -  Market risk (the chance that stock market prices will fall, sometimes
   suddenly and sharply).

- -  Interest rate risk (the chance that changes in interest rates will hurt real
   estate values).

INVESTMENT ADVISER (page 12)

Vanguard Core Management Group, Valley Forge, PA.

DISTRIBUTIONS* (page 10)

Distributions are paid in March, June, September, and December. These
distributions may include dividends and capital gains (which are taxable) and a
return of capital (which is generally nontaxable).

INCEPTION DATE: May 13, 1996
   

NET ASSETS AS OF 1/31/97: $655 million

PORTFOLIO'S EXPENSE RATIO FOR THE PERIOD ENDED 1/31/97 (ANNUALIZED): 0.36%
    

LOADS, 12b-1 MARKETING FEES: None

SUITABLE FOR IRAS: Yes

MINIMUM INITIAL INVESTMENT: $3,000; $1,000 for IRAs and custodial accounts for
minors

NEWSPAPER ABBREVIATION: SPREITs

VANGUARD FUND NUMBER: 123

ACCOUNT FEATURES (page 13)

- -  Telephone Redemption (sales, not exchanges)

- -  Vanguard Direct Deposit Service(sm)

- -  Vanguard Automatic Exchange Service(sm)

- -  Vanguard Fund Express(R)

- -  Vanguard Dividend Express(sm)
   

<TABLE>
<CAPTION>
TOTAL RETURNS** --
PERIOD ENDED JANUARY 31, 1997
<S>                                       <C>
REIT Index Portfolio                      30.3%
Morgan Stanley REIT Index                 30.7
</TABLE>
    

**Since inception (5/13/96).

* IMPORTANT INFORMATION ABOUT DISTRIBUTIONS AND TAXES

Because REITs cannot provide complete information about the taxability of their
distributions until after the end of the calendar year, Vanguard plans to ask
the Internal Revenue Service each year for an extension on issuing Forms
1099-DIV ("1099s") for the REIT Index Portfolio. If this request is approved, we
expect to mail 1099s to Portfolio shareholders in nonretirement accounts during
February. See page 10 for details.

In evaluating performance, remember that it is not indicative of future
performance. Note, too, that both the return and principal value of an
investment will fluctuate so that an investor's shares, when redeemed, may be
worth more or less than their original cost.

                                       1
<PAGE>   67
                                PLAIN TALK ABOUT

                                   VANGUARD'S
                                 REDEMPTION FEES

Some Vanguard portfolios charge a redemption fee on shares held less than one
year. Unlike a sales charge or load paid to a broker or fund management company,
the fee is paid directly to the portfolio to offset the costs of buying and
selling securities. The fee, which is intended to discourage short-term trading,
ensures that short-term investors pay their share of the portfolio's transaction
costs and that long-term investors do not subsidize the activities of short-term
traders.

                                PLAIN TALK ABOUT

                                  FUND EXPENSES
   
All mutual funds have operating expenses. These expenses, which are deducted
from a fund's gross income, are expressed as a percentage of the net assets of a
fund. Vanguard REIT Index Portfolio's expense ratio in its first year of
operations is expected to be 0.36%, or $3.60 per $1,000 of average net assets.
As of January 31, 1997, the average real estate mutual fund had expenses of
1.69%, or $16.90 per $1,000 of average net assets, according to Lipper
Analytical Services, Inc., which reports on the mutual fund industry.
    

PORTFOLIO EXPENSES

The examples below are designed to help you understand the various costs you
would bear, directly or indirectly, as an investor in the Portfolio. As noted in
this table, you do not pay a load or sales commission when you buy, sell, or
exchange shares of the Portfolio.

<TABLE>
<CAPTION>
SHAREHOLDER TRANSACTION EXPENSES
<S>                                                         <C>
Sales Load Imposed on Purchases:                            None
Sales Load Imposed on Reinvested Distributions:             None
Redemption Fees*:                                           None
Exchange Fees*:                                             None
</TABLE>

   
 *The REIT Index Portfolio charges a 1% transaction fee on redemptions (sales
and exchanges) of shares that have been held less than one year. The fee is
deducted before your redemption proceeds are mailed to you or used to purchase
shares of another Vanguard fund; you cannot pay the fee separately. If some of
the shares that you are redeeming have been held one year or more, the fee will
apply to only those shares held less than one year. The fee does not apply to
shares acquired through reinvested dividend or capital gain distributions.
    

 The next table illustrates the operating expenses that you would incur as a
shareholder of the Portfolio. These expenses are deducted from the Portfolio's
income before it is paid to you, and include investment advisory expenses as
well as the costs of maintaining accounts, administering the Portfolio,
providing shareholder services, and other activities. The expenses shown in the
table are estimates for the Portfolio's first full year since the Portfolio was
not in operation until May 13, 1996.

   
<TABLE>
<CAPTION>
ESTIMATED ANNUAL PORTFOLIO OPERATING EXPENSES
<S>                                                           <C>      <C>
Management and Administrative Expenses:                                0.32%
Investment Advisory Expenses:                                          None
12b-1 Marketing Fees:                                                  None
Other Expenses
 Marketing and Distribution Costs:                            0.01%
 Miscellaneous Expenses (e.g., Taxes, Auditing):              0.03%
                                                              ----
Total Other Expenses:                                                  0.04%
                                                                       ----
 TOTAL OPERATING EXPENSES (EXPENSE RATIO):                             0.36%
                                                                       ====
</TABLE>

 The following example illustrates the hypothetical expenses that you would
incur on a $1,000 investment over various periods. The example assumes (1) that
the Portfolio provides a return of 5% a year and (2) that you redeem your
investment at the end of each period.

<TABLE>
<CAPTION>
           1 YEAR      3 YEARS     5 YEARS    10 YEARS
           -------------------------------------------
<S>        <C>         <C>         <C>         <C>
             $4          $12         $20         $46
           -------------------------------------------
</TABLE>
    

THIS EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF ACTUAL EXPENSES OR
PERFORMANCE FROM THE PAST OR FOR THE FUTURE, WHICH MAY BE HIGHER OR LOWER THAN
THOSE SHOWN.

                                       2
<PAGE>   68
FINANCIAL HIGHLIGHTS

   
The following financial highlights table shows the results for a share
outstanding for the period from May 13, 1996 (the first day of operations) to
January 31, 1997. The financial highlights were audited by Price Waterhouse,
LLP, independent accountants. You should read this information in conjunction
with the Portfolio's financial statements and accompanying notes, which appear
in the Portfolio's most recent annual report to shareholders. The report is
incorporated by reference in the Statement of Additional Information and in this
prospectus, and contains a more complete discussion of the Portfolio's
performance. You may have the report sent to you without charge by writing to
Vanguard or by calling our Investor Information Department.
    

<TABLE>
<CAPTION>
   
                                                                   MAY 13, 1996,*
FOR A SHARE OUTSTANDING THROUGHOUT THE PERIOD                   TO JANUARY 31, 1997
- -----------------------------------------------------------------------------------
<S>                                                             <C>
NET ASSET VALUE, BEGINNING OF PERIOD                                     $10.00
                                                                         ------
INVESTMENT OPERATIONS
 Net Investment Income                                                     .341
 Net Realized and Unrealized Gain (Loss) on Investments                   2.659
                                                                         ------
  TOTAL FROM INVESTMENT OPERATIONS                                        3.000
- -----------------------------------------------------------------------------------
DISTRIBUTIONS
 Dividends from Net Investment Income                                     (.341)
 Distributions from Realized Capital Gains                                (.005)
 Return of Capital                                                        (.014)
                                                                         ------ 
  TOTAL DISTRIBUTIONS                                                     (.360)
- -----------------------------------------------------------------------------------
NET ASSET VALUE, END OF PERIOD                                           $12.64
===================================================================================
TOTAL RETURN**                                                           30.33%
===================================================================================
RATIOS/SUPPLEMENTAL DATA
Net Assets, End of Period (Millions)                                       $655
Ratio of Expenses to Average Net Assets                                  0.36%+
Ratio of Net Investment Income to Average
 Net Assets                                                              5.55%+
Portfolio Turnover Rate                                                      0%
Average Commission Rate Paid                                             $.0242
- -----------------------------------------------------------------------------------
</TABLE>

 *Commencement of operations.
**Total return figure does not reflect the 1% fee that is assessed on
  redemptions of shares that are held in the Portfolio for less than one year.
 +Annualized.
    

 From time to time, the Vanguard funds advertise yield and total return figures.
Yield is an historical measure of dividend income, and total return is a measure
of past dividend income (assuming that it has been reinvested) plus capital
appreciation. Neither yield nor total return should be used to predict the
future performance of a fund.

                                PLAIN TALK ABOUT

                   HOW TO READ THE FINANCIAL HIGHLIGHTS TABLE

   
Vanguard REIT Index Portfolio began operations on May 13, 1996, with a net asset
value (price) of $10.00 per share. As of January 31, 1997, the Portfolio earned
$.341 per share from investment income (interest and dividends) and $2.659 per
share from investments that had appreciated in value or that were sold for
higher prices than the Portfolio paid for them. This resulted in total earnings
of $3.000 per share, of which $.360 was returned to shareholders in the form of
distributions ($.005 from capital gains and $.014 from return of capital). The
earnings ($3.000 per share) less distributions ($.360 per share) resulted in a
share price of $12.64 on January 31, 1997, an increase of $2.64 per share (from
$10.00 at the beginning of the period to $12.64 at the end of the period). Total
return from the REIT Index Portfolio was 30.33% for the period.

 As of and for the period ended January 31, 1997, the Portfolio has $655 million
in net assets; an annualized expense ratio of 0.36% ($3.60 per $1,000 of net
assets); and annualized net investment income amounting to 5.55% of its average
net assets.
    

                                       3
<PAGE>   69
                                PLAIN TALK ABOUT

                                      REITs

Rather than owning properties directly -- which can be costly and difficult to
convert into cash when needed -- some investors buy shares in a company that
owns and manages real estate. This company is known as a real estate investment
trust, or REIT. Unlike corporations, REITs do not have to pay income taxes if
they meet certain Internal Revenue Code requirements. To qualify, a REIT must
distribute at least 95% of its taxable income to its shareholders and receive at
least 75% of that income from rents, mortgages, and sales of property. REITs
offer investors greater liquidity and diversification than direct ownership of a
handful of properties, as well as greater income potential than an investment in
common stocks. Like any investment in real estate, however, a REIT's performance
depends on several factors, such as its ability to find tenants for its
properties, to renew leases, and to finance property purchases and renovations.

A WORD ABOUT RISK

This prospectus describes the risks you will face as an investor in Vanguard
REIT Index Portfolio. It is important to keep in mind one of the main axioms of
investing: the higher the risk of losing money, the higher the potential reward.
The reverse, also, is generally true: the lower the risk, the lower the
potential reward. As you consider an investment in the REIT Index Portfolio, you
should also take into account your personal tolerance for the daily fluctuations
of the stock market.

  Look for this "warning flag" symbol [FLAG] throughout the Prospectus. It is
used to mark detailed information about each type of risk that you, as a
shareholder of the Portfolio, will confront.

THE PORTFOLIO'S OBJECTIVES

Vanguard REIT Index Portfolio seeks to provide above-average income (relative to
the Standard & Poor's 500 Composite Stock Price Index) and long-term growth of
capital. These objectives are fundamental, which means that they cannot be
changed unless a majority of shareholders vote to do so.

[FLAG]  BECAUSE OF THE SEVERAL TYPES OF RISK DESCRIBED ON THE FOLLOWING PAGES,
        YOUR INVESTMENT IN THE PORTFOLIO, AS WITH ANY INVESTMENT IN COMMON
        STOCKS, COULD LOSE MONEY.

WHO SHOULD INVEST

   
The REIT Index Portfolio may be a suitable investment for you if:

- -  You want to add indirect real estate exposure to your existing mix of stock,
   bond, and money market mutual funds.

- -  You want a stock fund that seeks to provide a high level of income and
   long-term capital growth.

- -  You are looking for an investment that performs differently than a
   diversified stock or bond fund.

- -  You characterize your investment temperament as "somewhat conservative."
    

 This Portfolio is not an appropriate investment if you are a "market-timer."
Investors who engage in excessive in-and-out trading activity generate
additional costs that are borne by all of the Portfolio's shareholders. To
minimize such costs, which reduce the ultimate returns achieved by you and other
shareholders, the Portfolio has adopted the following policies:

- -  The Portfolio charges a 1% redemption fee on shares held less than one year.

                                       4
<PAGE>   70
   
- -  The Portfolio reserves the right to reject any purchase request -- including
   exchanges from other Vanguard funds -- that it regards as disruptive to the
   efficient management of the Portfolio. This could be because of the timing of
   the investment or because of a history of excessive trading by the investor.

- -  There is a limit on the number of times you can exchange into or out of the
   Portfolio (see "Redeeming Shares" in the INVESTING WITH VANGUARD section).

- -  Telephone and on-line exchanges are not accepted for nonretirement accounts.

- -  The Portfolio reserves the right to stop offering shares at any time.
    

INVESTMENT STRATEGY

This section explains how the Portfolio's investment adviser tries to provide a
high level of income and long-term capital growth. It also explains three
important risks -- real estate industry risk, market risk, and interest rate
risk -- faced by investors in the Portfolio. Unlike the Portfolio's investment
objectives, the adviser's investment strategy is not fundamental and can be
changed by the Portfolio's board of directors without shareholder approval.
However, before making any important change in its strategy, the Portfolio will
give shareholders 30-days notice, in writing.

MARKET EXPOSURE

The Portfolio intends to remain at least 98% invested in the stocks of real
estate investment trusts; the remaining assets will be invested in cash reserves
to maintain liquidity for shareholder redemptions.

[FLAG]  THE PORTFOLIO IS SUBJECT TO REAL ESTATE INDUSTRY RISK, WHICH IS THE
        POSSIBILITY THAT A REIT'S PROPERTIES COULD FALL IN VALUE.

 Because of its emphasis on REIT stocks, the Portfolio's performance is strongly
linked to the ups and downs of the real estate market. In general, real estate
values are affected by a variety of factors, including supply and demand for
properties; the economic health of the country as well as different regions; and
the strength of specific industries renting properties. Ultimately, a REIT's
performance depends on the types and locations of the properties it owns and on
how well the REIT manages its properties. For instance, rental income could
decline because of extended vacancies, increased competition from nearby
properties, tenants' failure to pay rent, or incompetent management. Property
values could decrease because of overbuilding, environmental liabilities,
uninsured damages caused by natural disasters, loss of IRS status as a qualified
REIT, a general decline in the neighborhood, losses due to casualty or
condemnation, increases in property taxes, or changes in zoning laws.

                                PLAIN TALK ABOUT

                           INVESTING FOR THE LONG TERM

Vanguard REIT Index Portfolio is intended to be a long-term investment vehicle
and is not designed to provide investors with a means of speculating on
short-term fluctuations in the stock or real estate markets.

                                PLAIN TALK ABOUT

                                 TYPES OF REITS

An equity REIT, which owns properties, generates income (from rental and lease
payments) and offers the potential for growth (from property appreciation), as
well as occasional capital gains from the sale of property. A mortgage REIT
makes loans to commercial real estate developers. Mortgage REITs earn interest
income, and are subject to credit risks (that is, the chance that a developer
will fail to repay a loan). A hybrid REIT holds properties and mortgages.

                                       5
<PAGE>   71
                                PLAIN TALK ABOUT

                                     INDEXES

An index is a group of securities whose overall performance is used as a
standard to measure investment performance.

                                PLAIN TALK ABOUT

                    LARGE-CAP, MID-CAP, AND SMALL-CAP STOCKS

   
Stocks of publicly traded companies -- and mutual funds that hold these stocks
- -- can be classified by the companies' market value, or capitalization. Vanguard
defines large-capitalization, or large-cap funds as those holding stocks of
companies with a median total market value exceeding $5 billion. Mid-cap funds
hold stocks of companies with a median market value between $1 billion and $5
billion. Small-cap funds hold stocks of companies with a median market value of
less than $1 billion. Historically, large-cap funds have exhibited lower
volatility than mid-cap and small-cap funds. Note that a fund's capitalization
parameters (that is, what constitutes a large-, mid-, or small-cap stock) may
vary from the parameters set by a particular index.
    

[FLAG]  THE PORTFOLIO IS SUBJECT TO MARKET RISK, WHICH IS THE POSSIBILITY THAT
        STOCK PRICES OVERALL WILL DECLINE OVER SHORT OR EVEN EXTENDED PERIODS.
        STOCK MARKETS TEND TO MOVE IN CYCLES, WITH PERIODS OF RISING STOCK
        PRICES AND PERIODS OF FALLING STOCK PRICES.

 To illustrate the volatility of stock prices, the following table shows the
best, worst, and average total returns (dividend income plus change in market
value) for the U.S. stock market over various periods as measured by the
Standard & Poor's 500 Composite Stock Price Index, a widely used barometer of
stock market activity. Note that the returns shown do not include the costs of
buying and selling stocks or other expenses that a real-world investment
portfolio would incur. Note, also, how the gap between best and worst tends to
narrow over the long term.

   
<TABLE>
<CAPTION>
                     U.S. STOCK MARKET RETURNS (1926 - 1996)
- ----------------------------------------------------------------------------
                     1 YEAR       5 YEARS        10 YEARS      20 YEARS
- ----------------------------------------------------------------------------
<S>                 <C>          <C>            <C>            <C>
Best                  53.9%        23.9%          20.1%          16.9%
Worst                -43.3        -12.5           -0.9            3.1
Average               12.7         10.4           10.8           10.8
- ----------------------------------------------------------------------------
</TABLE>

 The table covers all of the 1-, 5-, 10-, and 20-year periods from 1926 through
1996. For example, while the average return on stocks for all of the 5-year
periods was 10.4%, returns for the 5-year periods ranged from a -12.5% average
(from 1928 through 1932), to 23.9% (from 1950 through 1954). These average
returns reflect past performance on common stocks and should not be regarded as
an indication of future returns from either the stock market as a whole or the
REIT Index Portfolio in particular.

 REITs in the Morgan Stanley REIT Index tend to be medium-size and small
companies; their market capitalizations generally range from $75 million to $3
billion. Like small-cap stocks in general, REIT stocks can be more volatile than
- -- and at times will perform differently from -- the large-cap stocks found in
the S&P 500 Index.

 In addition, because small-cap stocks are typically less liquid than large-cap
stocks, REIT stocks may sometimes experience greater share-price fluctuations
than the stocks of larger companies. Historically, however, the significant
amount of dividend income provided by REITs has tended to soften the impact of
this volatility.
    

[FLAG]  THE PORTFOLIO IS SUBJECT TO INTEREST RATE RISK, WHICH IS THE POSSIBILITY
        THAT CHANGES IN INTEREST RATES COULD HURT REIT PERFORMANCE.

 In general, during periods of high interest rates, REITs may lose some of their
appeal for investors who may be able to obtain higher yields from other
income-producing investments, such as long-term

                                       6
<PAGE>   72
bonds. Higher interest rates also mean that financing for property purchases and
improvements is more costly and difficult to obtain.

SECURITY SELECTION AND PORTFOLIO DIVERSIFICATION

The REIT Index Portfolio employs a "passively" managed investment approach. The
Portfolio's adviser, Vanguard Core Management Group, invests at least 98% of the
Portfolio's assets in an attempt to parallel the performance of the Portfolio's
target benchmark, the Morgan Stanley REIT Index.

 The REIT Index Portfolio holds each stock contained in the Morgan Stanley REIT
Index in roughly the same proportions as in the Index itself. For example, if 5%
of the Morgan Stanley REIT Index were made up of the stock of a specific REIT,
the Portfolio would invest the same percentage of its noncash assets in that
stock.

[FLAG]  AN INDEX FUND HAS OPERATING EXPENSES; AN UNMANAGED MARKET INDEX DOES
        NOT. THEREFORE, AN INDEX FUND -- WHILE EXPECTED TO PARALLEL ITS TARGET
        INDEX AS CLOSELY AS POSSIBLE -- WILL NOT BE ABLE TO MATCH THE
        PERFORMANCE OF THE TARGET INDEX EXACTLY. THE CORRELATION BETWEEN THE
        PERFORMANCE OF THE REIT INDEX PORTFOLIO AND ITS TARGET INDEX IS EXPECTED
        TO BE AT LEAST 0.95.

 The Morgan Stanley REIT Index is made up of the stocks of all publicly traded
equity REITs (except health-care REITs) that meet certain criteria. For example,
to be included in the Index, a REIT must have a total market capitalization of
at least $100 million and have enough shares and trading volume to be considered
liquid. The REIT Index Portfolio invests in equity REITs only.

   
  As of January 31, 1997, 104 equity REITs were included in the Index. The Index
is rebalanced every calendar quarter as well as each time that a REIT is removed
from the Index because the REIT's market capitalization falls below $75 million
or because of corporate activity such as a merger, acquisition, leveraged buyout
(LBO), bankruptcy, IRS removal of REIT status, fundamental change in business,
or change in shares outstanding.

 Stocks in the Morgan Stanley REIT Index represent a broadly diversified range
of property types and regions. The Index's makeup, as of January 31, 1997,
follows.

<TABLE>
<CAPTION>
<S>                        <C>
 Retail Stores             29%
 Residential               27
 Office                    16
 Industrial                13
 Hotels                     7
 Diversified                7
 Other                      1
</TABLE>

 The Index's ten largest stocks are expected to make up about 30% of its market
value. The Index's largest stocks, as of January 31, 1997, follow.
    

                                PLAIN TALK ABOUT

                        ACTIVE VERSUS PASSIVE MANAGEMENT

   
Index portfolios are not actively managed by investment advisers who buy and
sell securities based on research and analysis. Instead, passive management --
also known as indexing -- tries to match, as closely as possible, the
performance of a target index by either holding all -- or a representative
sample -- of the securities in the index. Indexing appeals to many investors
because of its simplicity (indexing is a straightforward market-matching
strategy); relative performance predictability (an index portfolio is expected
to move in the same direction -- up or down -- as its target index); low cost
(index portfolios do not have many of the expenses of an actively managed fund
- -- such as research and company visits -- and keep trading activity -- and,
thus, brokerage commissions -- to a minimum); and low realization of capital
gains.
    

                                PLAIN TALK ABOUT

                            PORTFOLIO DIVERSIFICATION

In general, the more diversified a fund's portfolio of stocks, the less likely
that a specific stock's poor performance will hurt the fund. One measure of a
fund's level of diversification is the percentage of assets represented by its
ten largest holdings. The average U.S. equity mutual fund has about 25% of its
assets invested in its ten largest holdings, while some less-diversified mutual
funds have more than 50% of their assets invested in the stocks of just ten
companies.

                                       7
<PAGE>   73
                                PLAIN TALK ABOUT

                               PORTFOLIO TURNOVER

   
Before investing in a mutual fund, you should review its portfolio turnover rate
for an indication of the potential effect of transaction costs on the fund's
future returns. In general, the greater the volume of buying and selling by the
fund, the greater the impact that brokerage commissions and other transaction
costs will have on its return. Also, funds with high portfolio turnover rates
may be more likely than low-turnover funds to generate capital gains that must
be distributed to shareholders as taxable income. The average turnover rate for
actively managed funds investing in common stocks is 79%.
    

                                PLAIN TALK ABOUT

                                   DERIVATIVES

A derivative is a financial contract whose value is based on (or "derived" from)
another security (such as a stock or a bond), an asset (such as a commodity
like gold), or a market index (such as the S&P 500 Index). Futures and options
are derivatives that have been trading on regulated exchanges for more than two
decades. These "traditional" derivatives are standardized contracts that can
easily be bought and sold, and whose market values are determined and published
daily. It is these characteristics that differentiate futures and options from
the relatively new, exotic types of derivatives.

   
  1.  Simon DeBartolo Group, Inc. REIT
  2.  Public Storage, Inc. REIT
  3.  Security Capital Industrial Trust REIT
  4.  Equity Residential Properties Trust REIT
  5.  Crescent Real Estate, Inc. REIT
  6.  Security Capital Pacific, Inc. REIT
  7.  Starwood Lodging Trust REIT
  8.  Beacon Properties Corp. REIT
  9.  New Plan Realty Trust REIT
 10.  United Dominion Realty Trust REIT
    

 Vanguard REIT Index Portfolio is not sponsored, sold, promoted, or endorsed by
Morgan Stanley. The Morgan Stanley REIT Index is the exclusive property of
Morgan Stanley and is a service market of Morgan Stanley Group Inc. It has been
licensed for use by The Vanguard Group, Inc.

PORTFOLIO TURNOVER

Although the Portfolio generally seeks to invest for the long term, it retains
the right to sell securities regardless of how long they have been held.
Generally, a passively managed portfolio sells securities only to respond to
redemption requests or to adjust the number of shares held to reflect a change
in the portfolio's target index. Because of this, the Portfolio's turnover rate
is expected to be less than 25%. (A rate of 100% would occur, for example, if
the Portfolio sold or replaced securities valued at 100% of its total net assets
within a one-year period.)

INVESTMENT POLICIES

   
Besides normally investing at least 98% of its assets in REIT stocks, the
Portfolio may follow other investment policies to achieve its objectives.
    

[FLAG]  THE PORTFOLIO RESERVES THE RIGHT TO INVEST, TO A LIMITED EXTENT, IN
        STOCK FUTURES AND OPTIONS CONTRACTS, AND SWAP AGREEMENTS. STOCK FUTURES
        AND OPTIONS CONTRACTS ARE TRADITIONAL TYPES OF DERIVATIVES THAT ARE
        PUBLICLY TRADED ON EXCHANGES. SWAP AGREEMENTS ARE CUSTOMIZED CONTRACTS,
        OFTEN ARRANGED THROUGH A BROKER, BETWEEN TWO INSTITUTIONS. SWAP
        AGREEMENTS FUNCTION LIKE FUTURES, BUT ARE NOT PUBLICLY TRADED ON AN
        EXCHANGE.

 Losses (or gains) involving contracts can sometimes be substantial -- in part
because a relatively small price movement in a contract may result in an
immediate and substantial loss (or gain) for a portfolio.

 This Portfolio will not use futures, options, or swap agreements for
speculative purposes or as leveraged investments that magnify the gains or
losses of an investment. Rather, the Portfolio will keep separate cash reserves
or other liquid portfolio securities in the amount

                                       8
<PAGE>   74
of the obligation underlying the contract. Only a limited percentage of the
Portfolio's assets -- up to 5% if required for deposit and no more than 20% of
total assets -- may be committed to such contracts. To the extent that such
contracts are utilized, the Portfolio will not have 98% of its assets invested
in the REIT stock. However, such contracts will only be utilized in order to
mirror the performance of the Index.

 The reasons for which the Portfolio may use futures, options, and swap
agreements are:

- -  To execute trades more easily.

- -  To reduce costs -- and to improve returns -- by buying futures, options, or
   swap agreements instead of actual stocks when they are cheaper.

- -  To keep cash on hand to meet shareholder redemptions or other needs while
   simulating full investment in stocks.

 Although up to 2% of its assets will be invested in cash reserves to maintain
liquidity, the Portfolio will not invest in cash reserves, futures, options, or
swap agreements to protect against a decline in the values of REITs.

INVESTMENT LIMITATIONS

To reduce risk and maintain diversification, the Portfolio has adopted limits on
some of its investment practices. Specifically, the Portfolio will not:

- -  Invest more than 25% of its assets in any one industry other than real
   estate.

- -  Borrow money, except for the purpose of meeting shareholder requests to
   redeem shares. 

   With respect to 75% of its assets, this Portfolio will not:

- -  Invest more than 5% of its assets in the securities of any one company.

- -  Buy more than 10% of the outstanding voting securities of any company.

 The limitations listed in this prospectus and in the Statement of Additional
Information may be changed only by approval of a majority of the Portfolio's
shareholders.

INVESTMENT PERFORMANCE

   
Vanguard REIT Index Portfolio invests primarily in stocks of real estate
investment trusts, so its performance may not be correlated to the performance
of the overall stock market. Historically, stock market performance has been
characterized by sharp up-and-down swings in the short term and by more stable
growth over the long term. There may be periods, however, when REITs perform
quite differently from the broader market.
    

                                       9
<PAGE>   75
                                PLAIN TALK ABOUT

                                PAST PERFORMANCE

Whenever you see information on a fund's performance, do not consider the
figures to be an indication of the performance you could expect by making an
investment in the fund today. The past is an imperfect guide to the future;
history does not repeat itself in neat, predictable patterns.

                                PLAIN TALK ABOUT

                                  DISTRIBUTIONS

As a shareholder, you are entitled to your share of the Portfolio's earnings.
You receive such earnings from the REIT Index Portfolio as either a quarterly
distribution or as an annual capital gains distribution. The Portfolio's
quarterly payments come from distributions that the Portfolio receives from its
REIT holdings and interest it earns from any cash reserves. Capital gains are
realized when the Portfolio sells REIT stocks for higher prices than its
adjusted cost basis in the stocks. These gains may be short-term or long-term
depending on whether the Portfolio held the securities for less than or more
than one year.

   
<TABLE>
<CAPTION>
                TOTAL RETURNS* FOR PERIOD ENDED JANUARY 31, 1997
                ------------------------------------------------
                <S>                                      <C>
                 REIT Index Portfolio                     30.3%
                 Morgan Stanley REIT Index                30.7
                ------------------------------------------------
                 *Since inception (5/13/96).
</TABLE>
    

SHARE PRICE

The Portfolio's share price, called its net asset value, is calculated each
business day after the close of regular trading (generally 4 p.m. Eastern time)
on the New York Stock Exchange. Net asset value per share is computed by adding
up the total value of the Portfolio's investments and other assets, subtracting
any of its liabilities, or debts, and then dividing by the total number of
Portfolio shares outstanding:

                              TOTAL ASSETS  -  LIABILITIES
   NET ASSET VALUE  =---------------------------------------------------
                             NUMBER OF SHARES OUTSTANDING

 Daily net asset value, or NAV, is useful to you as a shareholder because the
NAV, multiplied by the number of Portfolio shares you own, gives you the dollar
amount you would have received had you sold all of your shares back to the
Portfolio that day.

 The Portfolio's share price can be found daily in the mutual fund listings of
most major newspapers under the heading Vanguard Group. Different newspapers use
different abbreviations of the Portfolio's name, but the most common is SPREITs.

DISTRIBUTIONS AND TAXES

Each March, June, September, and December, the REIT Index Portfolio will provide
shareholders with virtually all of the distributions it receives from its REIT
investments. Any capital gains realized from the sale of securities will be
distributed in December.

  You may receive distributions in cash, or you may have them automatically
reinvested in more shares of the Portfolio.

  If you own Portfolio shares in a nonretirement account, Vanguard will notify
you each year of the amount and taxability of the Portfolio's distributions paid
during the previous year (that is, the amount of dividends, capital gains, and
return of capital that you receive). You will also be notified of the amount, if
any, of federal income taxes withheld from the distribution.

  REITs do not provide complete information about the taxability of their
distributions until after the calendar year end. As a result, Vanguard cannot
determine how much of the REIT Index Portfolio's annual distributions is taxable
for shareholders until after the traditional January 31 deadline for issuing
Forms 1099-DIV ("1099"). Therefore, we plan to request permission each year from
the Internal Revenue Service (IRS) for an extension. IF OUR REQUEST IS APPROVED,

                                       10
<PAGE>   76
WE WILL MAIL FORMS 1099-DIV TO REIT INDEX PORTFOLIO SHAREHOLDERS WITH
NONRETIREMENT ACCOUNTS IN FEBRUARY.

TAXABILITY OF DISTRIBUTIONS

The portions of your distributions that are classified as dividends and
short-term capital gains are taxable to you as ordinary dividend income. Any
distributions of net long-term capital gains by the Portfolio are taxable to you
as long-term capital gains, no matter how long you've owned shares in the
Portfolio. Both dividends and capital gains are taxable to you whether received
in cash or reinvested in additional shares. In addition, distributions that are
declared in December -- even if paid to you in January -- are taxed as if they
had been paid to you in December.

 Although the Portfolio does not seek to realize any particular amount of
capital gains during a year, such gains are realized from time to time as
byproducts of its ordinary investment activities and distributions paid by
REITs. Consequently, distributions may vary from year to year.

 If you sell or exchange shares of the Portfolio, any gain or loss you have is
generally a taxable event, which means that you may have a capital gain or a
capital loss to report when you complete your federal income tax return.
Distributions -- as well as capital gains or losses from your sale or exchange
of Portfolio shares -- may be subject to state and local income taxes, too.

 Note that any dividends distributed by REITs -- and funds that invest in REITs
- -- are not eligible for the dividends-received deduction for corporations.

RETURN OF CAPITAL

   
The portion of your distributions that is classified as a return of capital is
generally not taxable to you. However, when you receive a return of capital,
your cost basis (that is, the adjusted cost of your investment, which is used to
determine a capital gain or loss) is decreased by the amount of the return of
capital. This, in turn, will affect the capital gain or loss you realize when
you sell or exchange any of your REIT Index Portfolio shares.
    

 Two other important tax considerations about return of capital:

- -  If you do not reinvest your distributions (that is, you receive your
   distributions in cash), your original investment in the Portfolio will be
   reduced by the amount of return of capital and capital gains included in the
   distribution.

- -  A return of capital is generally not taxable to you; however, any return of
   capital distribution would be taxable as a capital gain once your cost basis
   is reduced to zero (which could happen if you do not reinvest your
   distributions and return of capital in those distributions is significant).

 Keep in mind that the tax information in this prospectus is provided as general
information. You should consult your own tax adviser about the tax consequences
of an investment in the REIT Index Portfolio.

                                PLAIN TALK ABOUT

                                RETURN OF CAPITAL

The Internal Revenue Code requires a REIT to distribute at least 95% of its
taxable income to investors. In many cases, however, because of "noncash"
expenses such as property depreciation, an equity REIT's cash flows will exceed
its taxable income. The REIT may distribute this excess cash to offer a more
competitive yield (in other words, provide investors with a higher
distribution). This portion of the distribution is classified as a return of
capital.

                                       11
<PAGE>   77
                                PLAIN TALK ABOUT

                      VANGUARD'S UNIQUE CORPORATE STRUCTURE

The Vanguard Group, Inc. is the only MUTUAL mutual fund company. It is owned
jointly by the funds it oversees and by the shareholders in those funds. Other
mutual funds are operated by for-profit management companies that may be owned
by one person, by a group of individuals, or by investors who bought the
management company's publicly traded stock. Because of its structure, Vanguard
operates its funds at cost. Instead of distributing profits as other mutual fund
companies do, Vanguard returns profits to fund shareholders in the form of
lower operating expenses.

                                PLAIN TALK ABOUT

                             THE PORTFOLIO'S ADVISER

   
Vanguard Core Management Group provides investment advisory services to many
Vanguard Funds; as of January 31, 1997, the Group managed $80 billion in assets.
The individual who oversees the REIT Index Portfolio is:

  GEORGE U. SAUTER, Principal of Vanguard, 12 years investment experience, 10
years primary responsibility for Vanguard Core Management Group; A.B. from
Dartmouth College, M.B.A. from the University of Chicago.
    

THE PORTFOLIO AND VANGUARD

The Fund is a member of The Vanguard Group, a family of more than 30 investment
companies with more than 90 distinct investment portfolios and total net assets
of more than $260 billion. All of the Vanguard funds share in the expenses
associated with business operations, such as personnel, office space, equipment,
and advertising.

 Vanguard also provides marketing services to the funds. Although shareholders
do not pay sales commissions or 12b-1 marketing fees, each fund pays its
allocated share of The Vanguard Group's costs.

 A list of the Fund's directors and officers, and their present positions and
principal occupations during the past five years, can be found in the Statement
of Additional Information.

INVESTMENT ADVISER

Vanguard Core Management Group, P.O. Box 2600, Valley Forge, PA 19482, provides
investment advisory services on an at-cost basis to the Portfolio.

 The Group is authorized to choose brokers and dealers to handle the purchase
and sale of the Portfolio's securities, and is directed to get the best
available price and most favorable execution from these brokers with respect to
all transactions.

GENERAL INFORMATION

The REIT Index Portfolio is one of five Portfolios of Vanguard Specialized
Portfolios, Inc., a corporation organized under the laws of the state of
Maryland. The other Portfolios are the Energy, Gold & Precious Metals, Health
Care, and Utilities Income Portfolios. The Portfolios are all combined under one
corporation for administrative purposes, but operate as separate corporations in
virtually all respects.

   
 Shareholders of the REIT Index Portfolio have rights and privileges similar to
those enjoyed by other corporate shareholders. For example, shareholders will
not be responsible for any liabilities of the corporation. If any matters are to
be voted on by shareholders (such as a change in a fundamental investment
objective or the election of directors), each share outstanding at that point
would be entitled to one vote. The Portfolio will not hold annual meetings
except as required by the Investment Company Act of 1940. A meeting will be
scheduled (for example, to vote on the removal of a director) if the holders of
at least 10% of all Vanguard Specialized Portfolios' shares request a meeting in
writing.
    

                                       12
<PAGE>   78


INVESTING WITH VANGUARD

Are you looking for the most convenient way to open or add money to a Vanguard
account? Obtain instant access to fund information? Establish an account for a
minor child or for your retirement savings?

    Vanguard can help. Our goal is to make it easy and pleasant for you to do
business with us.

    The following sections of the prospectus briefly explain the many services
we offer you as a Vanguard REIT Index Portfolio shareholder. Booklets providing
detailed information are available on the services marked with a [BOOK GRAPHIC].
Please call us to request copies.

SERVICES AND ACCOUNT FEATURES

Vanguard offers many services that make it convenient to purchase, sell, or
exchange shares.

<TABLE>
<S>                                                   <C>
   TELEPHONE REDEMPTIONS                              Automatically set up for this Portfolio unless you notify us
   (SALES FOR NONRETIREMENT                           otherwise.
   ACCOUNTS ONLY; EXCHANGES
   FOR RETIREMENT ACCOUNTS ONLY)

   Vanguard Direct Deposit                            Automatic method for depositing your paycheck or U.S. government
   Service                                            payment (including Social Security and government pension checks)
   [BOOK GRAPHIC]                                     into your account.

   Vanguard Automatic Exchange                        Automatic method for moving a fixed amount of money
   Service                                            from one Vanguard fund account to another.*
   [BOOK GRAPHIC]


   Vanguard Fund Express                              Electronic method for buying or selling shares. You
   [BOOK GRAPHIC]                                     can transfer money between your Vanguard fund account
                                                      and an account at your bank, savings and loan, or
                                                      credit union on a systematic schedule.*

   Vanguard Dividend Express                          Electronic method for transferring distributions
   [BOOK GRAPHIC]                                     directly from your Vanguard fund account to your
                                                      bank, savings and loan, or credit union account or to
                                                      another Vanguard fund account.

   
   Vanguard Brokerage Services                        A cost-effective way to trade stocks, bonds, and
   (VBS)                                              options on major exchanges, the Nasdaq Stock Market,
   [BOOK GRAPHIC]                                     and other domestic over-the-counter markets at
                                                      reduced rates, and to buy and sell shares of
                                                      non-Vanguard mutual funds. Call VBS (1-800-992-8327)
                                                      for additional information and the appropriate forms.
    
</TABLE>


*Can be used to "dollar-cost average" [BOOK GRAPHIC] or to contribute to an
IRA or other retirement plan.


                                       13
<PAGE>   79
TYPES OF ACCOUNTS

INDIVIDUAL OR OTHER ENTITY

Vanguard's account registration form can be used to establish a variety of
nonretirement accounts.

<TABLE>
<S>                                         <C>
    FOR ONE OR MORE PEOPLE                  To open an account in the name of one (individual) or
                                            more (joint tenants) people. $3,000 minimum initial
                                            investment.

    FOR A MINOR CHILD                       To open an account as an UGMA/UTMA (Uniform
    [BOOK GRAPHIC]                          Gifts/Transfers to Minors Act). Age of majority and
                                            other transfer requirements are set by state law.
                                            $1,000 minimum initial investment.

    FOR HOLDING TRUST ASSETS                To invest assets held in an existing trust. $3,000
    [BOOK GRAPHIC]                          minimum initial investment.



    FOR THIRD-PARTY TRUSTEE                 To open an account as a retirement trust or plan
    RETIREMENT INVESTMENTS                  based on an existing corporate or institutional plan.
    (Vanguard is not the custodian          These accounts are established by the custodian or
    or trustee.)                            trustee of the existing plan.


    FOR AN ORGANIZATION                     To open an account as a corporation, partnership, or
                                            other entity. These accounts may require a corporate
                                            resolution or other documents to name the individuals
                                            authorized to act. $3,000 minimum initial investment.
</TABLE>


RETIREMENT

You establish these accounts with a Vanguard adoption agreement -- not a
Vanguard account registration form. To request the appropriate adoption
agreement and forms, or to receive answers to your questions about investing for
retirement, call Investor Information.

<TABLE>
<S>                                               <C>
    FOR AN INDIVIDUAL RETIREMENT                  To open a retirement account in the name of an individual.
    ACCOUNT (IRA)                                 IRAs can also be established with a regular contribution, a
    (Vanguard Fiduciary Trust                     direct rollover from an employer's plan such as a 401(k), or
    Company is the custodian.)                    an asset transfer or rollover from another financial
                                                  institution such as a bank or mutual fund company. $1,000
                                                  minimum initial investment.

   FOR A SIMPLIFIED EMPLOYEE                      To open a retirement account in the name of an employee. SEPs 
   PENSION PLAN ACCOUNT (SEP-IRA)                 allow employers to make deductible contributions directly to IRAs
   (Vanguard Fiduciary Trust                      established by their employees. A SEP can be established by
   Company is the custodian.)                     people who are self-employed, small business owners,
                                                  partnerships, or corporations.
</TABLE>


                                       14
<PAGE>   80
TYPES OF ACCOUNTS (continued)


   
<TABLE>
<S>                                     <C>
    FOR A SAVINGS INCENTIVE MATCH       To open a retirement account in the name of an employee.
    PLAN FOR EMPLOYEES ACCOUNT          Created as part of the Small Business Job Protection Act of
    (SIMPLE-IRA)                        1996, SIMPLEs replace SAR-SEPs. SIMPLEs are exclusively for
    (Vanguard Fiduciary Trust           employers that had 100 or fewer employees in the most recent
    Company is the custodian.)          calendar year and that do not maintain another
                                        employer-sponsored retirement plan. A SIMPLE can be
                                        established by people who are self-employed, small-business
                                        owners, partnerships, or corporations. Salary reduction
                                        contributions may be made by the employee, with matching or
                                        nonmatching contributions from the employer.

    FOR A QUALIFIED RETIREMENT          To open a retirement account that allows small business owners
    PROGRAM ACCOUNT                     or people who are self-employed to make tax-deductible
    (Vanguard Fiduciary Trust           retirement contributions for themselves and their employees
    Company can be the trustee.)        into Profit-Sharing and Money Purchase Pension (Keogh) plans.

    FOR A 403(b)(7) CUSTODIAL ACCOUNT   To open a retirement account that allows employees of tax-
    (Vanguard Fiduciary Trust           exempt institutions (for example, schools or hospitals) to
    Company is the custodian.)          make pretax retirement contributions.
</TABLE>
    



DISTRIBUTION OPTIONS

You can receive Portfolio distributions in two ways:

   
<TABLE>
<S>                                     <C>
   REINVESTMENT                         Distributions are automatically reinvested in additional
                                        shares of the Portfolio unless you request a different
                                        distribution method.
    

   DISTRIBUTIONS IN CASH                Distributions are paid by check and mailed to your account's
                                        address of record. NOTE: If you do not reinvest your
                                        distributions, your original investment will be reduced by the
                                        amount of the return of capital in the distribution. See
                                        "Distributions and Taxes."
</TABLE>


  To electronically transfer cash distributions to your bank, savings and loan,
  or credit union account, or to another Vanguard fund account, see Vanguard
  Dividend Express under "Services and Account Features."


BUYING SHARES

You buy your shares at the Portfolio's next-determined net asset value after
Vanguard receives your request, provided we receive your request before 4 p.m.
Eastern time (the close of trading on the New York Stock Exchange). The
Portfolio is offered on a no-load basis, meaning that you do not pay sales
commissions or 12b-1 marketing fees.



                                   15
<PAGE>   81
BUYING SHARES (continued)


<TABLE>
<CAPTION>
                                        OPEN A NEW ACCOUNT                              ADD TO AN EXISTING ACCOUNT

<S>                                     <C>                                            <C>
MINIMUM INVESTMENT                      $3,000 (regular account); $1,000 (IRAs and      $100 by mail or exchange; $1,000 by wire.
                                        custodial accounts for minors).

BY MAIL                                 Complete and sign the application form.         Mail your check with an Invest-By-Mail form
[ENVELOPE]                                                                              detached from your confirmation statement to
FIRST-CLASS mail to:                                                                    the address listed on the form.
The Vanguard Group
P.O. Box 2600                           Make your check payable to:                     Make your check payable to:
Valley Forge, PA 19482                  The Vanguard Group - 123.                       The Vanguard Group - 123.

EXPRESS or REGISTERED mail to:          All purchases must be made in U.S. dollars,     All purchases must be made in U.S. dollars,
The Vanguard Group                      and checks must be drawn on U.S. banks.         and checks must be drawn on U.S. banks.
455 Devon Park Drive
Wayne, PA 19087
</TABLE>


  IMPORTANT NOTE: To prevent check fraud, Vanguard will not accept checks made
  payable to third parties.




<TABLE>
<CAPTION>
                          FOR RETIREMENT ACCOUNTS ONLY:                         FOR RETIREMENT ACCOUNTS ONLY:

<S>                       <C>                                                   <C>
 BY TELEPHONE             Call Vanguard Tele-Account* 24 hours a day -- or      Call Vanguard Tele-Account* 24 hours a day -- or
[TELEPHONE]               Client Services during business hours -- to exchange  Client Services during business hours -- to exchange
1-800-662-6273            from another Vanguard Fund account with the same      from another Vanguard Fund account with the same
Vanguard Tele-Account(R)  registration (name, address, taxpayer I.D., and       registration (name, address, taxpayer I.D., and
1-800-662-2739            account type).                                        account type).
Client Services
                          Telephone exchanges for non-retirement accounts are   Telephone exchanges for non-retirement accounts are
                          not permitted.                                        not permitted.
</TABLE>

*You must obtain a Personal Identification Number through Tele-Account at least
seven days before you request your first exchange.






 IMPORTANT NOTE: Once a telephone transaction has been approved by you
 and a confirmation number assigned, it cannot be revoked. We reserve
 the right to refuse any purchase.



<TABLE>
<S>                             <C>                                                   <C>
BY WIRE                         Call Client Services to arrange your wire             Call Client Services to arrange your wire
[WIRE]                          transaction.                                          transaction.

Wire to:                        Wire transactions are not available for               Wire transactions are not available for
CoreStates Bank, N.A.           retirement accounts.                                  retirement accounts.
ABA 031000011
CoreStates No 01019897
[Temporary Account Number]
Vanguard REIT Index Portfolio
[Account Registration]
Attention: Vanguard




   
AUTOMATICALLY                                   --                                    Vanguard offers a variety of ways that you
[Graphic of Arrows in a circle]                                                       can add to your account automatically. See
                                                                                      "Services and Account Features."
</TABLE>
    





                                       16
<PAGE>   82

BUYING SHARES (continued)

   
You can redeem (that is, sell or exchange) shares purchased by check or Vanguard
Fund Express at any time. However, while your redemption request will be
processed as soon as it is received, your redemption proceeds will not be
available until payment for your purchase is collected, which may take up to ten
calendar days.


NOTE: If you buy Portfolio shares through a registered broker-dealer or
investment adviser, the broker-dealer or adviser may charge you a service fee.
    

    It is important that you call Vanguard before you invest a large dollar
amount by wire or check. We must consider the interests of all Portfolio
shareholders and so reserve the right to delay or refuse any purchase that may
disrupt the Portfolio's operation or performance.


REDEEMING SHARES

IMPORTANT TAX NOTE: Any sale or exchange of shares in a nonretirement account
could result in a taxable gain or a loss.

A 1% fee is charged for all redemptions (sales and exchanges) of Portfolio
shares held less than one year.

The ability to sell Portfolio shares by telephone is automatically established
for your nonretirement account unless you tell us in writing that you do not
want this option.

    To protect your account from unauthorized or fraudulent telephone
instructions, Vanguard follows specific security procedures. When we receive a
call requesting an account transaction, we require the caller to provide:

check mark   Portfolio name.
check mark   10-digit account number.
check mark   Name and address exactly as registered on that account.
check mark   Social Security or employer identification number as registered on 
             that account.

    If you call to sell shares, the sale proceeds will be made payable to you,
as the registered shareholder, and mailed to your account's address of record.

   
    If we follow reasonable security procedures, neither the Portfolio nor
Vanguard will be responsible for the authenticity of transaction instructions
received by telephone. We believe that these procedures are reasonable and that,
if we follow them, you bear the risk of any losses resulting from unauthorized
or fraudulent telephone transactions on your account.
    

HOW TO SELL SHARES

You may withdraw any part of your account, at any time, by selling shares.

    Sale proceeds are normally mailed within two business days after Vanguard
receives your request. The sale price of your shares will be the Portfolio's
next-determined net asset value after Vanguard receives all required documents
in good order.

    Good order means that the request includes:

check mark    Portfolio name and account number.
check mark    Amount of the transaction (in dollars or shares).
check mark    Signatures of all owners exactly as registered on the account.
check mark    Signature guarantees (if required).



                                       17
<PAGE>   83
Investor Information 1-800-662-7447 * Client Services 1-800-662-2739 * Tel-
Account 1-800-662-6273


REDEEMING SHARES (continued)

check mark  Any supporting legal documentation that may be required.

check mark  Any certificates you are holding for the account.

   Sales or exchange requests received after the close of trading on the New
York Stock Exchange (generally 4 p.m. Eastern time) are processed at the next
business day's net asset value.

   The Portfolio reserves the right to close any nonretirement or UGMA/UTMA
account whose balance falls below the minimum initial investment. The Portfolio
will deduct a $10 annual fee if your nonretirement account balance falls below
$2,500 or if your UGMA/UTMA account balance falls below $500. The fee is waived
if your total Vanguard fund account assets are $50,000 or more.

Some written requests require a signature guarantee from a bank, broker, or
other acceptable financial institution. A notary public cannot provide a
signature guarantee.

HOW TO EXCHANGE SHARES

An exchange is the selling of shares of one Vanguard fund to purchase shares of
another.

   Although every effort will be made to maintain the exchange privilege,
Vanguard reserves the right to revise or terminate the exchange privilege, limit
the amount of an exchange, or reject any exchange, at any time, without notice.

   Because excessive exchanges can potentially disrupt the management of the
Portfolio and increase transaction costs, Vanguard limits exchange activity to
TWO SUBSTANTIVE EXCHANGE REDEMPTIONS (at least 30 days apart) from the Portfolio
during any 12-month period. "Substantive" means either a dollar amount large
enough to have a negative impact on the Portfolio or a series of movements
between Vanguard funds.

   Before you exchange into a new Vanguard fund, please read its prospectus. For
a copy and for answers to questions you might have, please call Investor
Information.

  SELLING OR EXCHANGING SHARES   ACCOUNT TYPE

  BY TELEPHONE                   ALL TYPES EXCEPT RETIREMENT:
  [TELEPHONE RECEIVER GRAPHIC]   Call Vanguard Tele-Account* 24 hours a day --
                                 or Client Services during business hours -- to
  1-800-662-6273                 request a sale of shares. You cannot exchange
  Vanguard Tele-Account          shares of this Portfolio by telephone.
  1-800-662-2739                
  Client Services                RETIREMENT:
                                 You can exchange -- but not sell -- shares by
                                 calling Tele-Account or Client Services.
   
                                 *You must obtain a Personal Identification
                                 Number through Tele-Account at least seven days
                                 before you request your first sale of shares.

  BY MAIL                        ALL TYPES EXCEPT RETIREMENT:
  [ENVELOPE GRAPHIC]             Send a letter of instruction signed by all
                                 registered account holders. Include the
  FIRST-CLASS mail to:           Portfolio name and account number and (if you
  The Vanguard Group             are selling) a dollar amount or number of
  Vanguard REIT Index Portfolio  shares OR (if you are exchanging) the name of
  P.O. Box 1120                  the fund you want to exchange into and a dollar
  Valley Forge, PA 19482         amount or number of shares.

                                       18
<PAGE>   84
REDEEMING SHARES (continued)

  SELLING OR EXCHANGING SHARES   ACCOUNT TYPE

   
  BY MAIL                        RETIREMENT:
  [ENVELOPE GRAPHIC]
  EXPRESS or REGISTERED          For information on how to request distributions
  mail to:                       from . . .
  The Vanguard Group             - IRAs, call Client Services.
  Vanguard REIT Index Portfolio  - SEP-IRAs, SIMPLE-IRAs, 403(b)(7) custodial 
  455 Devon Park Drive             accounts, and Profit-Sharing and Money
  Wayne, PA 19087                  Purchase Pension (Keogh) Plans, call 
                                   Individual Retirement Plans at 
                                   1-800-662-2003. 
                                 Depending on your account registration type, 
                                 additional documentation may be required.

  EXCHANGING ON-LINE             You may use your personal computer to
                                 exchange shares of most Vanguard funds by
  [GRAPHIC OF COMPUTER]          accessing Vanguard's website
                                 (http://www.vanguard.com). To establish this
                                 service on your account, you must first
                                 register through our website. We will then send
                                 to you, by mail, an account access password
                                 that will enable you to make on-line exchanges.
                                   The Vanguard funds that you cannot purchase 
                                 or sell through on-line exchange are VANGUARD
                                 INDEX TRUST, VANGUARD BALANCED INDEX FUND,
                                 VANGUARD INTERNATIONAL EQUITY INDEX FUND,
                                 VANGUARD REIT INDEX PORTFOLIO, VANGUARD TOTAL
                                 INTERNATIONAL PORTFOLIO, AND VANGUARD GROWTH
                                 AND INCOME PORTFOLIO (formerly known as
                                 Vanguard Quantitative Portfolios). These funds
                                 do permit on-line exchanges within IRAs and
                                 other retirement accounts.
    

  AUTOMATICALLY                  ALL TYPES EXCEPT RETIREMENT:
  [Graphic of Arrows             Vanguard offers several ways to sell or
   in a circle]                  exchange shares automatically (see "Services
                                 and Account Features"). Call Investor
                                 Information for the appropriate booklet and
                                 application if you did not elect a feature when
                                 you opened your account.

   It is important that you call Vanguard before you redeem a large dollar
amount. We must consider the interests of all Portfolio shareholders and so
reserve the right to delay your redemption proceeds -- up to seven days -- if
the amount will disrupt the Portfolio's operation or performance.


                         A NOTE ON UNUSUAL CIRCUMSTANCES
  Vanguard reserves the right to revise or terminate the telephone redemption
  privilege at any time, without notice. In addition, Vanguard can stop selling
  shares or postpone payment at times when the New York Stock Exchange is closed
  or under any emergency circumstances as determined by the United States
  Securities and Exchange Commission. If you experience difficulty making a
  telephone redemption during periods of drastic economic or market change, you
  can send us your request by regular or express mail. Follow the instructions
  on selling or exchanging shares by mail in the "Redeeming Shares" section.


Investor Information 1-800-662-7447  *  Client Services 1-800-662-2739
Tele-Account 1-800-662-6273
                                       19
<PAGE>   85
Investor Information 1-800-662-7447  * Client Services 1-800-662-2739
Tele-Account 1-800-662-6273

FUND AND ACCOUNT UPDATES

STATEMENTS AND REPORTS
We will send you clear, concise account and tax statements to help you keep
track of your Portfolio account throughout the year as well as when you are
preparing your income tax returns.

   In addition, you will receive financial reports about Vanguard REIT Index
Portfolio twice a year. These comprehensive reports include an assessment of the
Portfolio's performance (and a comparison to its industry benchmark), an
overview of the markets, a report from the adviser, as well as a listing of its
holdings and other financial statements.


  CONFIRMATION STATEMENT         Sent each time you buy, sell, or exchange
                                 shares; confirms the trade date and the amount
                                 of your transaction.

  PORTFOLIO SUMMARY              Mailed quarterly; shows the market value of
                                 your account at the close of the statement
                                 period, as well as distributions, purchases,
                                 sales, and exchanges for the current calendar
                                 year.

  FUND FINANCIAL REPORTS         Mailed in March and September for this
                                 Portfolio.

  TAX STATEMENTS                 Generally mailed in January; report previous
                                 year's distributions, proceeds from the sale of
                                 shares, and distributions from IRAs or other
                                 retirement accounts.

  AVERAGE COST STATEMENT         Issued annually for taxable accounts; shows the
  [BOOK GRAPHIC]                 average cost of shares that you redeemed during
                                 the previous year, using the average cost
                                 single category method.


AUTOMATED TELEPHONE ACCESS

  VANGUARD TELE-ACCOUNT          Toll-free access to Vanguard fund and account
  1-800-662-6273                 information -- as well as some transactions
                                 -- through any Touch-Tone(TM) telephone.
  Any time, seven days a         Tele-Account provides total return, share
  week, from anywhere in         price, price change, and yield quotations for
  the continental United         all Vanguard funds; gives your account balances
  States and Canada.             and history (e.g., last transaction and latest
                                 distribution); and allows you to sell or
  [BOOK GRAPHIC]                 exchange fund shares.  

COMPUTER ACCESS

   
  VANGUARD ON THE                Use your personal computer to visit Vanguard's
  WORLD WIDE WEB                 education-oriented website, which provides
  http://www.vanguard.com        timely news and information about Vanguard
                                 funds and services; an on-line "university"
                                 that offers a variety of mutual fund classes;
                                 and easy-to-use, interactive tools to help you
                                 create your own investment and retirement
                                 strategies. 
    


                                       20
<PAGE>   86
GLOSSARY OF INVESTMENT TERMS

ACTIVE MANAGEMENT
An investment approach that seeks to exceed the average returns of the financial
markets. Active managers rely on research, market forecasts, and their own
judgment and experience in selecting securities to buy and sell.

CAPITAL GAINS DISTRIBUTION
Payment to mutual fund shareholders of gains realized on securities that the
fund has sold at a profit (minus any realized losses) or gains distributed by
the fund's holdings themselves.

COMMON STOCK
A security representing ownership rights in a corporation. A stockholder is
entitled to share in the company's profits, some of which are paid out as
dividends.

COST BASIS
The adjusted cost of an investment used to determine a capital gain or loss for
tax purposes.

DISTRIBUTIONS
Payments to shareholders of dividend income, capital gains, and return of
capital generated by the fund's investment activities and distribution policies,
after expenses.

DIVIDEND INCOME
Payment to shareholders of income from interest or dividends generated by the
fund's investments. For tax purposes, dividend income also includes short-term
capital gains.

EQUITY REIT
A type of real estate investment trust (REIT) that earns rental income by
investing in land and buildings.

EXPENSE RATIO
The percentage of a fund's average net assets used to pay its expenses. The
expense ratio includes management fees, administrative fees, and any 12b-1
marketing fees.

FIXED-INCOME SECURITIES
Investments, such as bonds, that have a fixed payment schedule. While the level
of income offered by these securities is predetermined, their prices may
fluctuate.

INDUSTRY CONCENTRATION
Focusing on the securities of a specific industry (such as real estate,
technology, or utilities).

LIQUIDITY
The degree of a security's marketability (that is, how quickly the security can
be sold at a fair price and converted to cash).

MUTUAL FUND
An investment company that pools the money of many people and invests it in a
variety of securities in an effort to achieve a specific objective over time.

PASSIVE MANAGEMENT
A low-cost investment strategy in which a mutual fund tries to match -- rather
than outperform -- a particular market index. Also known as indexing.

PRINCIPAL
The amount of your own money you put into an investment.

REAL ESTATE INVESTMENT TRUST (REIT)
A company that owns and manages a portfolio of properties, mortgages, or both.

RETURN OF CAPITAL
A nontaxable portion of distributions. In general, the cost basis of an
investment is reduced when a return of capital is distributed, deferring taxes
until the investment is sold.

TOTAL RETURN
A percentage change, over a specified time period, in a mutual fund's net asset
value, with the ending net asset value adjusted to account for the reinvestment
of all distributions of dividends and capital gains.

VOLATILITY
The fluctuations in value of a mutual fund or other security. The greater a
fund's volatility, the wider the fluctuations between its high and low prices.

YIELD
Current income (interest or dividends) earned by an investment, expressed as a
percentage of the investment's price.
<PAGE>   87
[SHIP]
THE VANGUARD GROUP
Post Office Box 2600
Valley Forge, PA 19482

INVESTOR INFORMATION
DEPARTMENT
1-800-662-7447 (SHIP)
TEXT TELEPHONE:
1-800-952-3335
For information on our funds, fund services, and retirement accounts; requests 
for literature

CLIENT SERVICES DEPARTMENT
1-800-662-2739 (CREW)
TEXT TELEPHONE:
1-800-662-2738
For information on your account, account transactions, account statements

VANGUARD BROKERAGE SERVICES
1-800-992-8327
For information on trading stocks, bonds, and options at reduced commissions

VANGUARD TELE-ACCOUNT(R) 
1-800-662-6273 (ON-BOARD) 
For 24-hour automated access to price and yield, information on your account,
certain transactions 

ELECTRONIC ACCESS TO THE VANGUARD MUTUAL FUND EDUCATION AND INFORMATION CENTER
World Wide Web
http://www.vanguard.com

(C) 1997 Vanguard Marketing
Corporation, Distributor

P123N
<PAGE>   88
 
                                     PART B
 
                        VANGUARD SPECIALIZED PORTFOLIOS
 
                      STATEMENT OF ADDITIONAL INFORMATION
 
   
                                  MAY 30, 1997
    
 
   
     This Statement is not a prospectus but should be read in conjunction with
the Fund's current Prospectus (dated May 30, 1997. To obtain the Prospectus
please call the Investor Information Department:
    
 
                                 1-800-662-7447
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                                                            PAGE
                                                                                            ----
<S>                                                                                         <C>
Investment Objectives and Policies........................................................   B-1
Investment Policies.......................................................................   B-2
Investment Limitations....................................................................   B-6
Management of the Fund....................................................................   B-8
Investment Advisory Services..............................................................  B-10
Securities Transactions...................................................................  B-12
Purchase of Shares........................................................................  B-13
Redemption of Shares......................................................................  B-13
Share Price of Each Portfolio.............................................................  B-14
Performance Measures......................................................................  B-14
Yield and Total Return....................................................................  B-16
Financial Statements......................................................................  B-16
</TABLE>
    
 
                       INVESTMENT OBJECTIVES AND POLICIES
 
     The following policies supplement the Fund's investment objectives and
policies set forth in the Prospectus.
 
   
     FOREIGN INVESTMENTS.  As indicated in the Prospectus, each Portfolio (with
the exception of the REIT Index Portfolio) may include foreign securities to a
certain extent. Investors should recognize that investing in foreign companies
involves certain special considerations which are not typically associated with
investing in U.S. companies. Since the stocks of foreign companies are
frequently denominated in foreign currencies, and since the Portfolio may
temporarily hold uninvested reserves in bank deposits in foreign currencies, the
Portfolio will be affected favorably or unfavorably by changes in currency rates
and in exchange control regulations, and may incur costs in connection with
conversions between various currencies. The investment policies of each
Portfolio permit it to enter into forward foreign currency exchange contracts in
order to hedge the Portfolio's holdings and commitments against changes in the
level of future currency rates. Such contracts involve an obligation to purchase
or sell a specific currency at a future date at a price set at the time of the
contract.
    
 
     As foreign companies are not generally subject to uniform accounting,
auditing and financial reporting standards and practices comparable to those
applicable to domestic companies, there may be less publicly available
information about certain foreign companies than about domestic companies.
Securities of some foreign companies are generally less liquid and more volatile
than securities of comparable domestic companies. There is generally less
government supervision and regulation of stock exchanges, brokers and listed
companies than in the U.S. In addition, with respect to certain foreign
countries, there is the possibility of expropriation or confiscatory taxation,
political or social instability, or diplomatic developments which could affect
U.S investments in those countries.
 
     Although each Portfolio will endeavor to achieve most favorable execution
costs in its portfolio transactions in foreign securities, fixed commissions on
many foreign stock exchanges are generally higher than
 
                                       B-1
<PAGE>   89
 
negotiated commissions on U.S. exchanges. In addition, it is expected that the
expenses for custodial arrangements of the Portfolio's foreign securities will
be somewhat greater than the expenses for the custodial arrangements for
handling U.S. securities of equal value.
 
     Certain foreign governments levy withholding taxes against dividend and
interest income. Although in some countries a portion of these taxes is
recoverable, the non-recovered portion of foreign withholding taxes will reduce
the income the Portfolio receives from its foreign investments. However, these
foreign withholding taxes are not expected to have a significant impact on the
Portfolios, since each Portfolio's investment objective is to seek long-term
capital appreciation and any income should be considered incidental.
 
   
     ILLIQUID SECURITIES.  Illiquid securities are securities that may not be
sold or disposed of in the ordinary course of business within seven business
days, at approximately the value at which they are being carried on a
Portfolio's books. An illiquid security includes repurchase agreements which
have a maturity of longer than seven days, securities which are illiquid by
virtue of the absence of a readily available market, and demand instruments with
a demand notice exceeding seven days. Illiquid securities may include securities
that are not registered under the Securities Act of 1933 (the "1933 Act");
however, unregistered securities that can be sold to "qualified institutional
buyers" in accordance with Rule 144A under the 1933 Act will not be considered
illiquid so long as it is determined by a Portfolio's adviser that an adequate
trading market exists for the security.
    
 
   
     PORTFOLIO TURNOVER.  While the rate of Portfolio turnover is not a limiting
factor when management deems changes appropriate, it is anticipated that each
Portfolio's annual portfolio turnover rate will not normally exceed 100%. One
way a portfolio turnover rate of 100% can occur is if all of the Portfolio's
securities, exclusive of U.S. Government securities and other securities whose
maturities at the time of acquisition are one year or less, are replaced in the
period of one year. Turnover rates may vary greatly from year to year as well as
within a particular year and may also be affected by cash requirements for
redemptions of each Portfolio's shares and by requirements which enable the Fund
to receive certain favorable tax treatments. The portfolio turnover rates will,
of course, depend in large part on the level of purchases and redemptions of
shares of each Portfolio. Higher portfolio turnover can result in corresponding
increases in brokerage costs to the Portfolios of the Fund and their
shareholders.
    
 
                              INVESTMENT POLICIES
 
   
     FUTURES CONTRACTS.  Each Portfolio may enter into futures contracts,
options, and options on futures contracts for several reasons: to maintain cash
reserves while remaining fully invested, to facilitate trading, to reduce
transaction costs, or to seek higher investment returns when a futures contract
is priced more attractively than the underlying equity security or index.
Futures contracts provide for the future sale by one party and purchase by
another party of a specified amount of a specific security at a specified future
time and at a specified price. Futures contracts which are standardized as to
maturity date and underlying financial instrument are traded on national futures
exchanges. Futures exchanges and trading are regulated under the Commodity
Exchange Act by the Commodity Futures Trading Commission ("CFTC"), a U.S.
Government Agency. Assets committed to futures contracts will be segregated at
the Fund's custodian bank to the extent required by law.
    
 
     Although futures contracts by their terms call for actual delivery or
acceptance of the underlying securities, in most cases the contracts are closed
out before the settlement date without the making or taking of delivery. Closing
out an open futures position is done by taking an opposite position ("buying" a
contract which has previously been "sold," or "selling" a contract previously
purchased) in an identical contract to terminate the position. Brokerage
commissions are incurred when a futures contract is bought or sold.
 
     Futures traders are required to make a good faith margin deposit in cash or
government securities with a broker or custodian to initiate and maintain open
positions in futures contracts. The Fund's margin deposits will be placed in a
segregated account maintained by the Fund's custodian bank. A margin deposit is
intended to assure completion of the contract (delivery or acceptance of the
underlying security) if it is not terminated prior to the specified delivery
date. Minimal initial margin requirements are established by the futures
 
                                       B-2
<PAGE>   90
 
exchange and may be changed. Brokers may establish deposit requirements which
are higher than the exchange minimums. Futures contracts are customarily
purchased and sold on margin which may range upward from less than 5% of the
value of the contract being traded.
 
     After a futures contract position is opened, the value of the contract is
marked to market daily. If the futures contract price changes to the extent that
the margin on deposit does not satisfy margin requirements, payment of
additional "variation" margin will be required. Conversely, change in the
contract value may reduce the required margin, resulting in a repayment of
excess margin to the contract holder. Variation margin payments are made to and
from the futures broker for as long as the contract remains open. The Fund
expects to earn interest income on its margin deposits.
 
     Traders in futures contracts may be broadly classified as either "hedgers"
or "speculators." Hedgers use the futures markets primarily to offset
unfavorable changes in the value of securities otherwise held for investment
purposes or expected to be acquired by them. Speculators are less inclined to
own the securities underlying the futures contracts which they trade, and use
futures contracts with the expectation of realizing profits from fluctuations in
the prices of underlying securities.
 
     Regulations of the CFTC applicable to the Fund require that all of its
futures transactions constitute bona fide hedging transactions. A Portfolio will
only sell futures contracts to protect securities it owns against price declines
or purchase contracts to protect against an increase in the price of securities
it intends to purchase. As evidence of this hedging interest, the Fund expects
that approximately 75% of its futures contract purchases will be "completed,"
that is, equivalent amounts of related securities will have been purchased or
are being purchased by the Portfolio upon sale of open futures contracts.
 
     Although techniques other than the sale and purchase of futures contracts
could be used to control a Portfolio's exposure to market fluctuations, the use
of futures contracts may be a more effective means of hedging this exposure.
While a Portfolio will incur commission expenses in both opening and closing out
futures positions, these costs are lower than transaction costs incurred in the
purchase and sale of the underlying securities.
 
   
     RESTRICTIONS ON THE USE OF FUTURES CONTRACTS.  A Portfolio will not enter
into futures contract transactions to the extent that, immediately thereafter,
the sum of its initial margin deposits on open contracts exceeds 5% of the
market value of its total assets. In addition, a Portfolio will not enter into
futures contracts to the extent that its outstanding obligations to purchase
securities under these contracts would exceed 20% of the its total assets.
    
 
   
     RISK FACTORS IN FUTURES TRANSACTIONS.  Positions in futures contracts may
be closed out only on an Exchange which provides a secondary market for such
futures. However, there can be no assurance that a liquid secondary market will
exist for any particular futures contract at any specific time. Thus, it may not
be possible to close a futures position. In the event of adverse price
movements, a Portfolio would continue to be required to make daily cash payments
to maintain its required margin. In such situations, if the Portfolio has
insufficient cash, it may have to sell portfolio securities to meet daily margin
requirements at a time when it may be disadvantageous to do so. In addition, a
Portfolio may be required to make delivery of the instruments underlying futures
contracts it holds. The inability to close options and futures positions also
could have an adverse impact on the ability to effectively hedge.
    
 
     Each Portfolio will minimize the risk that it will be unable to close out a
futures contract by only entering into futures which are traded on national
futures exchanges and for which there appears to be a liquid secondary market.
 
     The risk of loss in trading futures contracts in some strategies can be
substantial, due both to the low margin deposits required, and the extremely
high degree of leverage involved in futures pricing. As a result, a relatively
small price movement in a futures contract may result in immediate and
substantial loss (as well as gain) to the investor. For example, if at the time
of purchase, 10% of the value of the futures contract is deposited as margin, a
subsequent 10% decrease in the value of the futures contract would result in a
total loss of the margin deposit, before any deduction for the transaction
costs, if the account were then closed out. A 15% decrease would result in a
loss equal to 150% of the original margin deposit if the contract were closed
 
                                       B-3
<PAGE>   91
 
out. Thus, a purchase or sale of a futures contract may result in losses in
excess of the amount invested in the contract. However, because the futures
strategies of the Fund are engaged in only for hedging purposes, the Adviser
does not believe that the Portfolios are subject to the risks of loss frequently
associated with futures transactions. A Portfolio would presumably have
sustained comparable losses if, instead of the futures contract, it had invested
in the underlying financial instrument and sold it after the decline.
 
     Utilization of futures transactions by a Portfolio does involve the risk of
imperfect or no correlation where the securities underlying futures contracts
have different maturities than the portfolio securities being hedged. It is also
possible that a Portfolio could both lose money on futures contracts and also
experience a decline in value of its portfolio securities. There is also the
risk of loss by a Portfolio of margin deposits in the event of bankruptcy of a
broker with whom the Portfolio has an open position in a futures contract or
related option. Additionally, investments in futures contracts and options
involve the risk that the investment advisers will incorrectly predict stock
market and interest rate trends.
 
     Most futures exchanges limit the amount of fluctuation permitted in futures
contract prices during a single trading day. The daily limit establishes the
maximum amount that the price of a futures contract may vary either up or down
from the previous day's settlement price at the end of a trading session. Once
the daily limit has been reached in a particular type of contract, no trades may
be made on that day at a price beyond that limit. The daily limit governs only
price movement during a particular trading day and therefore does not limit
potential losses, because the limit may prevent the liquidation of unfavorable
positions. Futures contract prices have occasionally moved to the daily limit
for several consecutive trading days with little or no trading, thereby
preventing prompt liquidation of future positions and subjecting some futures
traders to substantial losses.
 
   
     FEDERAL TAX TREATMENT OF FUTURES CONTRACTS.  Each Portfolio is required for
Federal income tax purposes to recognize as income for each taxable year its net
unrealized gains and losses on certain futures contracts as of the end of the
year as well as those actually realized during the year. In most cases, any gain
or loss recognized with respect to a futures contract is considered to be 60%
long-term capital gain or loss and 40% short-term capital gain or loss, without
regard to the holding period of the contract. Furthermore, sales of futures
contracts which are intended to hedge against a change in the value of
securities held by a Portfolio may affect the holding period of such securities
and, consequently, the nature of the gain or loss on such securities upon
disposition. A Portfolio may be required to defer the recognition of losses on
futures contracts to the extent of any unrecognized gains on related positions
held by the Portfolio.
    
 
     In order for a Portfolio to continue to qualify for Federal income tax
treatment as a regulated investment company, at least 90% of its gross income
for a taxable year must be derived from qualifying income; i.e., dividends,
interest, income derived from loans of securities, gains from the sale of
securities or foreign currencies or other income derived with respect to the
Fund's business of investing in securities or currencies. In addition, gains
realized on the sale or other disposition of securities held for less than three
months must be limited to less than 30% of the Portfolio's annual gross income.
It is anticipated that any net gain realized from the closing out of futures
contracts will be considered gain from the sale of securities and therefore be
qualifying income for purposes of the 90% requirement. In order to avoid
realizing excessive gains on securities held less than three months, the
Portfolio may be required to defer the closing out of futures contracts beyond
the time when it would otherwise be advantageous to do so. It is anticipated
that unrealized gains on futures contracts, which have been open for less than
three months as of the end of the Portfolio's fiscal year and which are
recognized for tax purposes, will not be considered gains on sales of securities
held less than three months for the purpose of the 30% test.
 
     A Portfolio will distribute to shareholders annually any net capital gains
which have been recognized for Federal income tax purposes (including unrealized
gains at the end of the Fund's fiscal year) on futures transactions. Such
distributions will be combined with distributions of capital gains realized on
the Portfolio's other investments and shareholders will be advised on the nature
of the transactions.
 
   
     REPURCHASE AGREEMENTS.  Each Portfolio may invest in repurchase agreements
with commercial banks, brokers or dealers either for defensive purposes due to
market conditions or to generate income from its excess cash balances. A
repurchase agreement is an agreement under which the Fund acquires a money
market
    
 
                                       B-4
<PAGE>   92
 
   
instrument (generally a security issued by the U.S Government or an agency
thereof, a banker's acceptance or a certificate of deposit) from a commercial
bank, broker or dealer, subject to resale to the seller at an agreed upon price
and date (normally, the next business day). A repurchase agreement may be
considered a loan collateralized by securities. The resale price reflects an
agreed upon interest rate effective for the period the instrument is held by the
Portfolio and is unrelated to the interest rate on the underlying instrument. In
these transactions, the securities acquired by the Portfolio (including accrued
interest earned thereon) must have a total value in excess of the value of the
repurchase agreement and are held by a custodian bank until repurchased. In
addition, the Fund's Board of Directors will monitor each Portfolio's repurchase
agreement transactions generally and will establish guidelines and standards for
review by the investment adviser of the creditworthiness of any bank, broker or
dealer party to a repurchase agreement with any Portfolio of the Fund. No more
than an aggregate of 15% of a Portfolio's assets, at the time of investment,
will be invested in repurchase agreements having maturities longer than seven
days and securities subject to legal or contractual restrictions on resale for
which there are no readily available market quotations. From time to time, the
Fund's Board of Directors may determine that certain restricted securities known
as Rule 144A securities are liquid and not subject to the 15% limitation
described above. See "Illiquid Securities" on p.2.
    
 
     The use of repurchase agreements involves certain risks. For example, if
the other party to the agreement defaults on its obligation to repurchase the
underlying security at a time when the value of the security has declined, the
Portfolio may incur a loss upon disposition of the security. If the other party
to the agreement becomes insolvent and subject to liquidation or reorganization
under the Bankruptcy Code or other laws, a court may determine that the
underlying security is collateral for a loan by the Portfolio not within the
control of the Portfolio and therefore the realization by the Portfolio on such
collateral may be automatically stayed. Finally, it is possible that the
Portfolio may not be able to substantiate its interest in the underlying
security and may be deemed an unsecured creditor of the other party to the
agreement. While the Fund's management acknowledges these risks, it is expected
that they can be controlled through careful monitoring procedures.
 
   
     LENDING OF SECURITIES.  Each Portfolio may lend its securities on a
short-term basis or long-term basis to qualified institutional investors who
need to borrow securities in order to complete certain transactions, such as
covering short sales, avoiding failures to deliver securities or completing
arbitrage operations. By lending its securities, the Portfolio will be
attempting to increase its net investment income through the receipt of interest
on the loan. Any gain or loss in the market price of the securities loaned that
might occur during the term of the loan would be for the account of the
Portfolio. Each Portfolio may lend its portfolio securities to qualified
brokers, dealers, banks or other financial institutions, so long as the terms,
the structure and the aggregate amount of such loans are not inconsistent with
the Investment Company Act of 1940, or the Rules and Regulations or
interpretations of the Securities and Exchange Commission (the "Commission")
thereunder, which currently require that (a) the borrower pledge and maintain
with the Fund collateral consisting of cash, an irrevocable letter of credit or
securities issued or guaranteed by the United States Government having a value
at all times not less than 100% of the value of the securities loaned, (b) the
borrower add to such collateral whenever the price of the securities loaned
rises (i.e., the borrower "marks to the market" on a daily basis), (c) the loan
be made subject to termination by the Portfolio at any time and (d) the
Portfolio receives reasonable interest on the loan which may include the
Portfolio's investing any cash collateral in interest bearing short-term
investments, any distribution on the loaned securities and any increase in their
market value. A Portfolio will not lend its portfolio securities, if as a
result, the aggregate value of such loans exceeds 33 1/3% of the value of the
Portfolio's total assets. Loan arrangements made by a Portfolio will comply with
all other applicable regulatory requirements, including the rules of the New
York Stock Exchange, which rules presently require the borrower, after notice,
to redeliver the securities within the normal settlement time of three business
days. All relevant facts and circumstances, including the creditworthiness of
the broker, dealer or institution, will be considered in making decisions with
respect to the lending of securities, subject to review by the Fund's Board of
Directors.
    
 
     At the present time, the Staff of the Commission does not object if an
investment company pays reasonably negotiated fees in connection with loaned
securities, so long as such fees are set forth in a written contract and
approved by the investment company's Directors (Trustees). In addition, voting
rights pass with
 
                                       B-5
<PAGE>   93
 
the loaned securities, but if a material event will occur affecting an
investment on loan, the loan must be called and the securities voted.
 
                             INVESTMENT LIMITATIONS
 
     The following policies supplement the Fund's investment limitations set
forth in the Prospectus. It is a fundamental policy of each Portfolio not to
engage in any of the following activities or business practices. These
restrictions may not be changed with respect to a particular Portfolio without
the approval of a majority of the outstanding shares (as defined in the
Investment Company Act of 1940 (the "1940 Act")) of that Portfolio. A Portfolio
may not:
 
      1) Issue senior securities;
 
      2) Borrow money, except from banks (or through reverse repurchase
         agreements), for temporary or emergency (not leveraging) purposes,
         including the meeting of redemption requests which might otherwise
         require the untimely disposition of securities, in an amount not in
         excess of 15% of the value of the net assets of the Portfolio
         (including the amount borrowed and the value of any outstanding reverse
         repurchase agreements) at the time the borrowing is made. Whenever
         borrowings exceed 5% of the value of the net assets of the Portfolio,
         the Portfolio will not make any additional investments;
 
      3) With respect to 75% of the value of its total assets, purchase the
         securities of any issuer (except obligations of the United States
         government and its instrumentalities) if as a result the Portfolio
         would hold more than 10% of the outstanding voting securities of the
         issuer, or more than 5% of the value of the Portfolio's total assets
         would be invested in the securities of such issuer;
 
      4) Engage in the business of underwriting securities issued by others,
         except to the extent that the Portfolio may technically be deemed to be
         an underwriter under the Securities Act of 1933, as amended, in
         disposing of portfolio securities;
 
   
      5) Purchase or otherwise acquire any security if, as a result, more than
         15% of its net assets would be invested in securities that are illiquid
         (including the Fund's investment in The Vanguard Group, Inc., as
         described on page 9);
    
 
      6) Make loans except (i) by purchasing bonds, debentures or similar
         obligations (including repurchase agreements, subject to the limitation
         described in (5) above) which are either publicly distributed or
         customarily purchased by institutional investors, and (ii) by lending
         its securities to banks, brokers, dealers and other financial
         institutions so long as such loans are not inconsistent with the
         Investment Company Act or the Rules and Regulations or interpretations
         of the Commission thereunder and the aggregate value of all securities
         loaned does not exceed 33 1/3% of the market value of the Portfolio's
         total assets;
 
      7) Pledge, mortgage, or hypothecate its assets, except to secure
         borrowings permitted by limitation (2) above;
 
      8) Buy any securities or other property on margin (except for such
         short-term credits as are necessary for the clearance of transactions),
         or engage in short sales (unless by virtue of its ownership of other
         securities it has a right to obtain at no added cost securities
         equivalent in kind and amount to the securities sold) except as set
         forth below in (12);
 
      9) Purchase or sell puts or calls, or combinations thereof; provided
         however, that a Portfolio may enter into forward foreign currency
         exchange transactions except as set forth below in (12);
 
     10) Purchase or sell real estate or real estate limited partnerships
         (although it may purchase securities secured by real estate or
         interests therein, or issued by companies or investment trusts which
         invest in real estate or interests therein), except in the case of the
         REIT Index Portfolio which may invest 100% of its assets in real estate
         investment trusts;
 
                                       B-6
<PAGE>   94
 
     11) The Fund will not invest in securities of other investment companies,
         except as may be acquired as a part of a merger, consolidation or
         acquisition of assets approved by the Fund's shareholders or otherwise
         to the extent permitted by Section 12 of the 1940 Act. The Fund will
         invest only in investment companies which have investment objectives
         and investment policies consistent with those of the Fund;
 
     12) Purchase or sell commodities or commodity contracts; provided, however,
         that a Portfolio may enter into forward foreign currency exchange
         transactions and that each Portfolio may invest in futures contracts
         and options to the extent that not more than 5% of the portfolios
         assets are required as deposit to secure obligations under futures
         contracts and not more than 20% of a portfolio's assets are invested in
         futures contracts and options at any time, the Portfolio may also
         invest in bullion as described in the prospectus;
 
     13) Purchase or retain securities of an issuer if an officer or director of
         such issuer is an officer or Director of the Fund or its investment
         adviser and one or more of such officers or Directors of the Fund or
         its investment adviser owns beneficially more than  1/2% of such shares
         or securities of such issuer and all such directors and officers owning
         more than  1/2% of such shares or securities together own more than 5%
         of such shares or securities; and
 
     14) Invest in companies for the purpose of exercising control of
         management.
 
     Notwithstanding these limitations, the Fund may own all or any portion of
the securities of, make loans to, or contribute to the costs or other financial
requirements of, any company which will be wholly owned by the Fund and one or
more other investment companies and is primarily engaged in the business of
providing at cost services, such as management, administrative, distribution or
other related services to the Fund and other investment companies. (See
"Management of the Fund").
 
     In addition, no Portfolio may engage in any of the following activities;
however, these restrictions may be changed by the Directors without shareholder
approval or prior notification:
 
      1) Invest directly in oil, gas, or other mineral exploration or
         development programs, including oil & gas or other mineral leases;
         provided, however, that if consistent with the designated business
         activities of a particular Portfolio, a Portfolio may purchase
         securities of issuers whose principal business activities fall within
         such areas;
 
      2) Purchase warrants, valued at the lower of cost or market, in excess of
         5% of the value of the Fund's net assets. Including within that amount,
         but not to exceed 2% of the value of the Fund's net assets, may be
         warrants which are not listed on the New York or American Stock
         Exchange. Warrants acquired by a Portfolio at any time in units or
         attached to securities are not subject to this restriction;
 
      3) Invest more than 5% of its assets, at the time of investment, in the
         securities of any issuers which have records of less than three years'
         continuous operation, including the operation of any predecessor (other
         than obligations issued or guaranteed as to interest and principal by
         the U.S. Government or its agencies or instrumentalities).
 
   
     The above-mentioned investment limitations are considered at the time
investment securities are purchased.
    
 
                                       B-7
<PAGE>   95
 
                             MANAGEMENT OF THE FUND
 
     The Officers of the Fund manage its day-to-day operations and are
responsible to the Fund's Board of Directors. The Directors set broad policies
for each Fund and choose its Officers. The following is a list of the Directors
and Officers of the Funds and a statement of their present positions and
principal occupations during the past five years. The mailing address of the
Directors and Officers of the Fund is Post Office Box 876, Valley Forge, PA
19482.
 
                             DIRECTORS AND OFFICERS
 
   
<TABLE>
<S>                                                <C>
JOHN C. BOGLE, Chairman and Director*              JOHN C. SAWHILL, Director
  Chairman and Director of The Vanguard Group,     President and Chief Executive Officer, The
  Inc. and of each of the investment companies     Nature Conservancy; formerly, Director and
  in The Vanguard Group; Director of The Mead        Senior Partner, McKinsey & Co. and
  Corporation, General Accident Insurance and        President, New York University; Director of
  Chris-Craft Industries, Inc.                       Pacific Gas and Electric Company, Procter &
JOHN J. BRENNAN, President, Chief Executive          Gamble Company and NACCO Industries.
Officer and Director*                              JAMES O. WELCH, JR., Director
  President, Chief Executive Officer and           Retired Chairman of Nabisco Brands, Inc.,
  Director of The Vanguard Group, Inc. and of      retired Vice Chairman and Director of RJR
  each of the investment companies in The            Nabisco; Director of TECO Energy, Inc.; and
  Vanguard Group.                                    Director of Kmart Corporation.
ROBERT E. CAWTHORN, Director                       J. LAWRENCE WILSON, Director
  Chairman Emeritus and Director of Rhone-         Chairman and Chief Executive Officer of Rohm &
  Poulenc Rorer, Inc.; Director of Sun               Haas Company; Director of Cummins Energy
  Company, Inc.                                      Company; Trustee of Vanderbilt University.
BARBARA BARNES HAUPTFUHRER, Director               RAYMOND J. KLAPINSKY, Secretary*
  Director of The Great Atlantic and Pacific       Senior Vice President and Secretary of The
  Tea Company, Alco Standard Corp., Raytheon         Vanguard Group, Inc.; Secretary of each of
  Company, Knight-Ridder, Inc., and                  the investment companies in The Vanguard
  Massachusetts Mutual Life Insurance Co. and        Group.
  trustee Emerita of Wellesley College.            RICHARD F. HYLAND, Treasurer*
BRUCE K. MACLAURY, Director                        Treasurer of The Vanguard Group, Inc. and of
  President, The Brookings Institution;            each of the investment companies in The
  Director of American Express Bank, Ltd., The       Vanguard Group.
  St. Paul Companies, Inc. and National Steel
  Corporation.                                     KAREN E. WEST, Controller*
                                                   Principal of The Vanguard Group, Inc.;
BURTON G. MALKIEL, Director                        Controller of each of the investment companies
  Chemical Bank Chairman's Professor of              in The Vanguard Group.
  Economics, Princeton University; Director of     ---------------
  Prudential Insurance Co. of America, Amdahl      *Officers of the Fund are "interested persons"
  Corporation, Baker Fentress & Co., The           as defined in the Investment Company Act of
  Jeffrey Co. and Southern New England             1940.
  Communications Company.
ALFRED M. RANKIN, JR., Director
  Chairman, President and Chief Executive
  Officer of NACCO Industries, Inc.; Director
  of The BFGoodrich Company, and The Standard
  Products Company.
</TABLE>
    
 
   
     THE VANGUARD GROUP.  The Fund is a member of The Vanguard Group of
Investment Companies which consists of more than 30 investment companies.
Through their jointly-owned subsidiary, The Vanguard Group, Inc. ("Vanguard"),
the Vanguard Funds obtain at cost virtually all of their corporate management,
administrative and distribution services.
    
 
                                       B-8
<PAGE>   96
 
     Vanguard employs a supporting staff of management personnel needed to
provide the requisite services to the Funds and also furnishes the Funds with
necessary office space, furnishings and equipment. Each Fund pays its share of
Vanguard's net expenses which are allocated among the Funds under procedures
approved by the Directors (Trustees) of each Fund. In addition, each Fund bears
its own direct expenses such as legal, auditing and custodian fees.
 
     The Officers of the Fund and the Vanguard Funds are also Officers and
employees of Vanguard. No Officer or employee is permitted to own any securities
of any external adviser for the Vanguard Funds.
 
     The Vanguard Group adheres to a Code of Ethics established pursuant to Rule
17j-1 under the Investment Company Act of 1940. The Code is designed to prevent
unlawful practices in connection with the purchase or sale of securities by
persons associated with Vanguard. Under Vanguard's Code of Ethics certain
officers and employees of Vanguard who are considered access persons are
permitted to engage in personal securities transactions. However, such
transactions are subject to procedures and guidelines substantially similar to
those recommended by the mutual fund industry and approved by the U.S.
Securities and Exchange Commission.
 
   
     The Vanguard Group was established and operates under a Funds' Service
Agreement which was approved by the shareholders of each of the Funds. The
amounts which each of the Funds have invested are adjusted from time to time in
order to maintain the proportionate relationship between each Fund's relative
net assets and its contribution to Vanguard's capital. At January 31, 1997 the
Fund had contributed capital of $452,000 to Vanguard representing 2.3% of its
capitalization. The Fund's Service Agreement provides as follows: (a) each
Vanguard Fund may invest up to .40% of its current assets in Vanguard, and (b)
there is no other limitation on the amount that each Vanguard Fund may
contribute to Vanguard's capitalization.
    
 
   
     MANAGEMENT.  Corporate management and administrative services include: (1)
executive staff; (2) accounting and financial; (3) legal and regulatory; (4)
shareholder account maintenance; (5) monitoring and control of custodian
relationships; (6) shareholder reporting; and (7) review and evaluation of
advisory and other services provided to the Vanguard Funds by third parties.
During the fiscal year ended January 31, 1997, the Fund's share of Vanguard's
actual net costs of operation relating to management and administrative services
(including transfer agency) totaled approximately $10,775,000.
    
 
   
     DISTRIBUTION.  Vanguard also provides all distribution and marketing
services for the Vanguard Funds. The principal distribution expenses are for
advertising, promotional materials and marketing personnel. Distribution
services may also include organizing and offering to the public, from time to
time, one or more new investment companies which will become members of the
Group. The Directors and Officers of Vanguard determine the amount to be spent
annually on distribution activities, the manner and amount to be spent on each
Fund, and whether to organize new investment companies. During the fiscal year
ended January 31, 1997, the Fund paid approximately $880,000 of the Group's
distribution and marketing expenses, which represented an effective annual rate
of .02 of 1% of the Fund's average net assets.
    
 
     One half of the distribution expenses of a marketing and promotional nature
is allocated among the Vanguard Funds based upon their relative net assets. The
remaining one half of these expenses is allocated among the Vanguard Funds based
upon each Fund's sales for the preceding 24 months relative to the total sales
of the Funds as a Group. Provided, however, that no Fund's aggregate quarterly
rate of contribution for distribution expenses of a marketing and promotional
nature shall exceed 125% of the average distribution expense rate for the Group,
and that no Fund shall incur annual distribution expenses in excess of 20/100 of
1% of its average month-end net assets.
 
   
     INVESTMENT ADVISORY SERVICES.  Vanguard provides Vanguard Money Market
Reserves, Vanguard Admiral Funds, Vanguard Municipal Bond Fund, the several
Portfolios of Vanguard Fixed Income Securities Fund, Vanguard Institutional
Index Fund, Vanguard Bond Index Fund, several Portfolios of Vanguard Variable
Insurance Fund, Vanguard Treasury Fund, Vanguard California Tax-Free Fund,
Vanguard Florida Insured Tax-Free Fund, Vanguard New Jersey Tax-Free Fund,
Vanguard New York Insured Tax-Free Fund, Vanguard Ohio Tax-Free Fund, Vanguard
Pennsylvania Tax-Free Fund, the Total International Portfolio of Vanguard STAR
Fund, Vanguard Balanced Index Fund, Vanguard Index Trust, Vanguard International
Equity Index Fund, Vanguard Tax-Managed Fund, the Aggressive Growth Portfolio of
Vanguard Horizon Fund, the REIT Index Portfolio of Vanguard Specialized
Portfolios, a portion of Vanguard/Windsor II, and a portion of
    
 
                                       B-9
<PAGE>   97
 
Vanguard/Morgan Growth Fund, as well as several indexed separate accounts with
investment advisory services. These services are provided on an at-cost basis
from a money management staff employed directly by Vanguard. The compensation
and other expenses of this staff are paid by the Funds utilizing these services.
 
   
     REMUNERATION OF DIRECTORS AND OFFICERS.  The Fund pays each Director who is
not also an Officer, an annual fee plus travel and other expenses incurred in
attending Board meetings. During the year ended January 31, 1997, the Fund paid
approximately $13,000 in Director's fees. Directors who are also Officers
receive no remuneration for their services as Directors. The Fund's Officers and
employees are paid by Vanguard which, in turn, is reimbursed by the Fund, and
each other Fund in the Group, for its proportionate share of Officers' and
employees' salaries and retirement benefits. The Fund's proportionate share of
remuneration paid by Vanguard (and reimbursed by the Fund) during the fiscal
year to all Officers of the Fund, as a group, was approximately $128,863.
    
 
   
     Under its Retirement Plan, Vanguard contributes annually an amount equal to
10% of each Officer's annual compensation plus 5.7% of that part of an eligible
Officer's compensation during the year, if any, that exceeds the Social Security
Taxable Wage Base then in effect. Under its Thrift Plan, all employees of
Vanguard are permitted to make pre-tax basic contributions in a maximum amount
equal to 4% of total compensation. Vanguard matches the basic contributions on a
100% basis. The Fund's proportionate share of benefits paid by Vanguard under
its Retirement and Thrift Plans to all Officers of the Fund, as a group, during
the fiscal year ended January 31, 1997 was approximately $3,450.
    
 
   
     The following table provides detailed information with respect to the
amounts paid or accrued for the Directors for the fiscal year ended January 31,
1997.
    
 
                        VANGUARD SPECIALIZED PORTFOLIOS
                               COMPENSATION TABLE
 
   
<TABLE>
<CAPTION>
                                                                                            TOTAL COMPENSATION
                                               PENSION OR RETIREMENT                             FROM ALL
                                AGGREGATE        BENEFITS ACCRUED       ESTIMATED ANNUAL      VANGUARD FUNDS
                               COMPENSATION         AS PART OF              BENEFITS              PAID TO
     NAMES OF DIRECTORS         FROM FUND          FUND EXPENSES        UPON RETIREMENT        DIRECTORS(2)
- ----------------------------   ------------    ---------------------    ----------------    -------------------
<S>                            <C>             <C>                      <C>                 <C>
John C. Bogle(1)                      --                  --                      --                   --
John J. Brennan(1)                    --                  --                      --                   --
Barbara Barnes Hauptfuhrer        $1,537               $ 239                $ 15,000              $65,000
Robert E. Cawthorn                $1,537               $ 199                $ 13,000              $65,000
Bruce K. MacLaury                 $1,665               $ 232                $ 12,000              $60,000
Burton G. Malkiel                 $1,537               $ 159                $ 15,000              $65,000
Alfred M. Rankin, Jr.             $1,537               $ 126                $ 15,000              $65,000
John C. Sawhill                   $1,537               $ 149                $ 15,000              $65,000
James O. Welch, Jr.               $1,537               $ 184                $ 15,000              $65,000
J. Lawrence Wilson                $1,537               $ 133                $ 15,000              $65,000
</TABLE>
    
 
- ---------------
(1) As "Interested Directors," Messrs. Bogle and Brennan receive no compensation
    for their service as Directors.
(2) The amounts reported in this column reflect the total compensation paid to
    each Director for their service as Director or Trustee of 34 Vanguard Funds
    (33 in the case of Mr. Malkiel; 27 in the case of Mr. MacLaury).
 
     DIRECTORS' RETIREMENT FEES  A Retirement Plan for Directors has been
implemented to provide a fee to retired Directors equal to $1,000 per year of
service on the Board, up to 15 years of service. This fee will remain in place
subsequent to the Director's retirement for a period of 10 years or until a
retired Director's death.
 
                          INVESTMENT ADVISORY SERVICES
 
     INVESTMENT ADVISORY AGREEMENT WITH WELLINGTON MANAGEMENT COMPANY, LLP  The
Fund employs Wellington Management Company, LLP ("WMC") under an investment
advisory agreement dated as of May 1, 1996 to manage the investment and
reinvestment of the assets of the Fund's Energy, Health Care, and Utilities
Income Portfolios and to continuously review, supervise and administer each
Portfolio's investment program. WMC discharges its responsibilities subject to
the control of the officers and Directors of the Fund.
 
                                      B-10
<PAGE>   98
 
     Under the investment advisory agreement, the three Portfolios are required
to pay the Adviser an aggregate fee at the end of each fiscal quarter,
calculated by applying a quarterly rate, based on the following annual
percentage rates, to the aggregate average month-end net assets of the
Portfolios for the quarter:
 
<TABLE>
<CAPTION>
                                       NET ASSETS                                      RATE
    --------------------------------------------------------------------------------  ------
    <S>                                                                               <C>
    First $500 million..............................................................  0.150%
    Next $500 million...............................................................  0.125%
    Next $1 billion.................................................................  0.100%
    Next $1 billion.................................................................  0.075%
    Over $3 billion.................................................................  0.050%
</TABLE>
 
   
     The advisory fee is based on the total assets of the Portfolios and is
allocated to each Portfolio based on the relative net assets of each. In
addition, once the advisory fee to WMC is calculated for the three Portfolios
under this schedule, the total fee will be reduced in order that the advisory
fee paid by the Utilities Income Portfolio does not exceed 0.08%. During the
years ended January 31, 1995, 1996, 1997 the Fund paid to WMC advisory fees
totaling $2,192,000, $2,698,000, and $3,343,000, respectively, which represented
an effective annual rate of .14 of 1%, .12 of 1% and .09 of 1%, after giving
effect to a fee waiver of $181,000 (.01 of 1%), respectively, of the aggregate
average net assets of the Energy, Health Care, and Utilities Income Portfolios.
These fees were paid pursuant to the terms of a previous investment advisory
agreement, which called for a higher rate of fees.
    
 
   
     DESCRIPTION OF WMC.  WMC is a Massachusetts limited liability partnership,
of which the following persons are managing partners: Robert W. Doran, Duncan M.
McFarland, and John R. Ryan.
    
 
   
     INVESTMENT ADVISORY AGREEMENT WITH M & G GROUP P.L.C.  The Fund has also
entered into an investment advisory agreement with M & G Investment Management
Limited ("M & G"), dated December 1, 1996 to manage the assets of the Gold &
Precious Metals Portfolio. Under this agreement M & G manages the investment and
reinvestment of the assets of the Gold & Precious Metals Portfolio and
continuously renews, supervises and administers the Portfolio's investment
program. M & G will discharge its responsibilities subject to the control of the
officers and Directors of the Fund.
    
 
   
     DESCRIPTION OF M & G.  M & G is a wholly-owned subsidiary of the M & G
Group P.L.C. M & G Group P.L.C. is a public company whose shares are quoted on
the London Stock Exchange. Kleinwort, Benson Limited, a merchant bank, and the
Esmee Fairbairn Charitable Trust own respectively 42% and 32% of total shares
outstanding. The remaining 26% of shares are held by individuals, nominees,
pension plans and M & G employees.
    
 
     The Gold & Precious Metals Portfolio will pay M & G a fee at the end of
each fiscal quarter, calculated by applying a quarterly rate, based on the
following annual percentage rates, to the aggregate average month-end net assets
of the Portfolio for the quarter:
 
   
<TABLE>
<CAPTION>
                                       NET ASSETS                                      RATE
    --------------------------------------------------------------------------------  ------
    <S>                                                                               <C>
    First $100 million..............................................................   0.30%
    Next $150 million...............................................................   0.20%
    Next $250 million...............................................................   0.15%
    Over $500 million...............................................................   0.10%
</TABLE>
    
 
   
     During the years ended January 31, 1995, 1996 and 1997, the Gold & Precious
Metals Portfolio paid advisory fees of $1,116,000, $1,058,000 and $1,054,000,
respectively, to M & G which represented an effective annual rate of .17 of 1%
after giving effect to a fee waiver of $415,000 (.07 of 1%), .18 of 1% after
giving effect to a fee waiver of $364,000 (.06 of 1%), and .18 of 1% after
giving effect to a fee waiver of $310,000 (.05 of 1%), respectively, of average
net assets. These fees were paid pursuant to the terms of a previous investment
advisory agreement, which called for a higher rate of fees.
    
 
   
     The Vanguard Group furnishes investment advisory services to the REIT Index
Portfolio on an at-cost basis.
    
 
   
     INVESTMENT ADVISORY SERVICES.  Vanguard also provides investment advisory
services to Vanguard Municipal Bond Fund, Vanguard Admiral Funds, Vanguard
Balanced Index Fund, several Portfolios of Vanguard Variable Insurance Fund,
Vanguard Bond Index Fund, the Total International Portfolio of Vanguard STAR
Fund, Vanguard Index Trust, Vanguard Institutional Index Fund, Vanguard Money
Market Reserves,
    
 
                                      B-11
<PAGE>   99
 
several Portfolios of Vanguard Fixed Income Securities Fund, Vanguard
Tax-Managed Fund, the Total International Portfolio of Vanguard STAR Fund, the
Aggressive Growth Portfolio of Vanguard Horizon Fund, the REIT Index Portfolio
of Vanguard Specialized Portfolios, Vanguard California Tax-Free Fund, Florida
Insured Tax-Free Fund, New Jersey Tax-Free Fund, New York Insured Tax-Free Fund,
Ohio Tax-Free Fund, Pennsylvania Tax-Free Fund, a portion of the assets of
Vanguard/Windsor II, a portion of Vanguard/Morgan Growth Fund and several
indexed separate accounts. These services are provided on an at-cost basis from
money management staff employed directly by Vanguard. The compensation and other
expenses of this staff are paid by the Funds utilizing these services.
 
   
     The current agreements will continue until April 30, 1998, with respect to
WMC and January 31, 1998, with respect to M & G, and will be renewable
thereafter, for successive one-year periods, only if each renewal is
specifically approved by a vote of the Fund's Board of Directors, including the
affirmative votes of a majority of the Directors who are not parties to the
agreement or "interested persons" (as defined in the Investment Company Act of
1940) of any such party cast in person at a meeting called for the purpose of
considering such approval. In addition, the question of continuance of the
agreement may be presented to the shareholders of the Fund; in such event,
continuance shall be effected only if approved by the affirmative vote of a
majority of the outstanding voting securities of the Fund. If the holders of any
Portfolio fail to approve the agreement, WMC or M & G may continue to serve as
investment adviser to each Portfolio which approved the agreement, and to any
Portfolio which did not approve the agreement until new arrangements have been
made. The agreement is automatically terminated if assigned, and may be
terminated by any Portfolio without penalty, at any time, (1) either by vote of
the Board of Directors or by vote of the outstanding voting securities of the
Portfolio on sixty (60) days' written notice to WMC or M & G, or (2) by WMC or M
& G upon ninety (90) days' written notice to the Fund.
    
 
                            SECURITIES TRANSACTIONS
 
     The investment advisory agreements with WMC and M & G authorize the
investment advisers (with the approval of the Fund's Board of Directors) to
select the brokers or dealers that will execute the purchases and sales of
securities for the Fund's Portfolio(s) and directs the investment adviser to use
its best efforts to obtain the best available price and most favorable execution
with respect to all transactions for the Portfolio(s). Each investment adviser
has undertaken to execute each investment transaction at a price and commission
which provides the most favorable total cost or proceeds reasonably obtainable
under the circumstances.
 
     In placing portfolio transactions, each investment adviser will use its
best judgment to choose the broker most capable of providing the brokerage
services necessary to obtain best available price and most favorable execution.
The full range and quality of brokerage services available will be considered in
making these determinations. In those instances where it is reasonably
determined that more than one broker can offer the brokerage services needed to
obtain the best available price and most favorable execution, consideration may
be given to those brokers which supply investment research and statistical
information, and provide other services in addition to execution services to the
Fund and/or the investment adviser. Each investment adviser considers the
investment services it receives useful in the performance of its obligations
under the agreement but is unable to determine the amount by which such services
may reduce its expenses.
 
     The investment advisory agreements also incorporate the concepts of Section
28(e) of the Securities Exchange Act of 1934 by providing that, subject to the
approval of the Fund's Board of Directors, each investment adviser may cause the
Fund to pay a broker-dealer which furnishes brokerage and research services a
higher commission than that which might be charged by another broker-dealer for
effecting the same transaction; provided that such commission is deemed
reasonable in terms of either that particular transaction or the overall
responsibilities of the investment adviser to the Fund and the other Funds in
the Group.
 
     Currently, it is the Fund's policy that each investment adviser may at
times pay higher commissions in recognition of brokerage services felt necessary
for the achievement of better execution of certain securities transactions that
otherwise might not be available. An investment adviser will only pay such
higher commissions if it believes this to be in the best interest of the Fund.
Some brokers or dealers who may receive such higher commissions in recognition
of brokerage services related to execution of securities transactions are also
providers of research information to the investment adviser and/or the Fund.
However, the investment
 
                                      B-12
<PAGE>   100
 
adviser has informed the Fund that it will not pay higher commission rates
specifically for the purpose of obtaining research services.
 
     Since the Fund does not market its shares through intermediary brokers or
dealers, it is not the Fund's practice to allocate brokerage or principal
business on the basis of sales of its shares which may be made through such
firms. However, the Fund may place portfolio orders with qualified
broker-dealers who recommend the sale of shares of the Fund and may, when a
number of brokers and dealers can provide comparable best price and execution on
a particular transaction, consider the sale of Fund shares by a broker or dealer
in selecting among qualified broker-dealers.
 
   
     The total brokerage commissions paid by the Fund's Portfolios during the
fiscal years ended January 31, 1995, 1996 and 1997 totaled $2,225,321,
$3,080,278 and $4,807,083, respectively.
    
 
     Some securities considered for investment by one Portfolio may also be
appropriate for the other Portfolios and the other Funds and/or clients served
by the investment advisers. If purchase or sale of securities consistent with
the investment policies of a Portfolio, the other Portfolios and/or one or more
of these other Funds or clients are considered at or about the same time,
transactions in such securities will be allocated among the Portfolios and the
several Funds and clients in a manner deemed equitable by the respective
investment adviser. Although there will be no specified formula for allocating
such transactions, the allocation methods used, and the results of such
allocations, will be subject to periodic review by the Fund's Board of
Directors.
 
                               PURCHASE OF SHARES
 
     The Fund reserves the right in its sole discretion (i) to suspend the
offering of its shares, (ii) to reject purchase orders when in the judgment of
management such rejection is in the best interest of the Fund or any Portfolio,
and (iii) to reduce or waive the minimum investment for or any other
restrictions on initial and subsequent investments for certain fiduciary
accounts such as employee benefit plans or under circumstances where certain
economies can be achieved in sales of the Fund's shares.
 
   
     STOCK CERTIFICATES.  Your purchase will be made in full and fractional
shares of a Portfolio calculated to three decimal places. Shares are normally
held on deposit for shareholders by the Fund, which will send to shareholders a
statement of shares owned at the time of each transaction. This saves the
shareholders the trouble of safekeeping the certificates, and saves the Fund the
cost of issuing certificates. Except in the case of the Utilities Income
Portfolio, share certificates are available at any time upon written request at
no additional cost to shareholders. No certificates will be issued for the
Utilities Income Portfolio or for any fractional shares of the Fund's other
Portfolios.
    
 
                              REDEMPTION OF SHARES
 
     The Fund may suspend redemption privileges or postpone the date of payment
(i) during any period that the New York Stock Exchange is closed, or trading on
the Exchange is restricted as determined by the Securities and Exchange
Commission (the "Commission"), (ii) during any period when an emergency exists
as defined by the rules of the Commission as a result of which it is not
reasonably practicable for the Fund to dispose of securities owned by it, or
fairly to determine the value of its assets, and (iii) for such other periods as
the Commission may permit.
 
     The Fund has made an election with the Commission to pay in cash all
redemptions requested by any shareholder of record limited in amount during any
90-day period to the lesser of $250,000 or 1% or the net assets of the Fund at
the beginning of such period. Such commitment is irrevocable without the prior
approval of the Commission. Redemptions in excess of the above limits may be
paid in whole or in part, in investment securities or in cash, as the Directors
may deem advisable; however, payment will be made wholly in cash unless the
Directors believe that economic or market conditions exist which would make a
practice detrimental to the best interests of the Fund. If redemptions are paid
in investment securities, such securities will be valued as set forth in the
Prospectus under "The Share Price of Each Portfolio" and a redeeming shareholder
would normally incur brokerage expenses if he converted these securities to
cash.
 
                                      B-13
<PAGE>   101
 
                         SHARE PRICE OF EACH PORTFOLIO
 
     The share price or "net asset value" per share of each Portfolio is
computed once each day at the close of regular trading on the New York Stock
Exchange (generally 4:00 p.m. Eastern time) on each day the Exchange is open for
trading. Net asset value per share is computed by dividing the total value of
the investment and other assets of each Portfolio, less any liabilities, by the
total number of outstanding shares of such Portfolio.
 
     Securities listed on a U.S. exchange are valued at the latest quoted sales
prices on the day the valuation is made. Securities listed on a U.S. exchange
that are not traded on the valuation date are valued at the mean of the bid and
ask prices. Securities listed on a foreign exchange are valued at the latest
quoted sales price available before the time when assets are valued. All prices
of listed securities are taken from the exchange where the security is primarily
traded. For each Portfolio (with the exception of the REIT Index Portfolio),
unlisted securities for which market quotations are readily available are valued
at the latest quoted bid price. For the REIT Index Portfolio, unlisted
securities that are listed on the Nasdaq National List are valued at the latest
quoted sales price on the day the valuation is made. Unlisted securities that
are included on the Nasdaq National List, but do not trade on the valuation
date, and other unlisted securities are valued at the mean of the closing bid
and asked prices. Other assets and securities for which no market quotations are
readily available are valued in good faith at fair value using methods
determined by, or under the supervision of, the Board of Directors of the Fund.
Securities may be valued on the basis of prices provided by a pricing service
when such prices are believed to reflect the fair market value of such
securities.
 
     In determining each Portfolio's net asset value per share, all assets and
liabilities initially expressed in foreign currencies will be converted into
U.S. dollars at the bid price of such currencies against U.S. dollars last
quoted by a major bank or broker. If such quotations are not available as of the
close of the Exchange, the rate of exchange will be determined in accordance
with policies established in good faith by the Board of Directors.
 
   
                              PERFORMANCE MEASURES
    
 
     Vanguard may use reprinted material discussing The Vanguard Group, Inc. or
any of the member funds of The Vanguard Group of Investment Companies.
 
     Each of the investment company members of the Vanguard Group, including
Vanguard Specialized Portfolios, Inc., may, from time to time, use one or more
of the following unmanaged indices for comparative performance purposes.
 
STANDARD AND POOR'S 500 COMPOSITE STOCK PRICE INDEX -- is a well diversified
list of 500 companies representing the U.S. Stock Market.
 
WILSHIRE 5000 EQUITY INDEX -- consists of more than 7,000 common equity
securities, covering all stocks in the U.S. for which daily pricing is
available.
 
WILSHIRE 4500 EQUITY INDEX -- consists of all stocks in the Wilshire 5000 except
for the 500 stocks in the Standard and Poor's 500 Index.
 
   
MORGAN STANLEY CAPITAL INTERNATIONAL EAFE INDEX -- is an arithmetic, market
value-weighted average of the performance of over 900 securities listed on the
stock exchanges of countries in Europe, Australasia and the Far East.
    
 
GOLDMAN SACHS 100 CONVERTIBLE BOND INDEX -- currently includes 71 bonds and 29
preferreds. The original list of names was generated by screening for
convertible issues of $100 million or greater in market capitalization. The
index is priced monthly.
 
LEHMAN GNMA INDEX -- includes pools of mortgages originated by private lenders
and guaranteed by the mortgage pools of the Government National Mortgage
Association.
 
   
MORGAN STANLEY REIT INDEX -- consist of approximately 104 stocks of equity Real
Estate Investment Trusts (REITs). REITs in the index meet size and liquidity
criteria specified by Morgan Stanley. The index had a market value of $68
billion as of January, 1997.
    
 
                                      B-14
<PAGE>   102
 
LEHMAN LONG-TERM TREASURY BOND -- is composed of all bonds covered by the
Shearson Lehman Hutton Treasury Bond Index with maturities of 10 years or
greater.
 
MERRILL LYNCH CORPORATE & GOVERNMENT BOND -- consists of over 4,500 U.S.
Treasury, Agency and investment grade corporate bonds.
 
LEHMAN CORPORATE (BAA) BOND INDEX -- all publicly offered fixed-rate,
nonconvertible domestic corporate bonds rated Baa by Moody's, with a maturity
longer than 1 year and with more than $25 million outstanding. This index
includes over 1,000 issues.
 
LEHMAN BROTHERS LONG-TERM CORPORATE BOND INDEX -- is a subset of the Lehman
Corporate Bond Index covering all corporate, publicly issued, fixed-rate,
nonconvertible U.S. debt issues rated at least Baa, with at least $50 million
principal outstanding and maturity greater than 10 years.
 
   
BOND BUYER MUNICIPAL BOND INDEX -- is a yield index on current coupon high-grade
general obligation municipal bonds.
    
 
STANDARD & POOR'S PREFERRED INDEX -- is a yield index based upon the average
yield for four high-grade, non-callable preferred stock issues.
 
NASDAQ INDUSTRIAL INDEX -- is composed of more than 3,000 industrial issues. It
is a value-weighted index calculated on price change only and does not include
income.
 
COMPOSITE INDEX -- 65% Standard & Poor's 500 Index and 35% Lehman Long-Term
Corporate AA or Better Bond Index
 
   
COMPOSITE INDEX -- 65% Lehman Long-Term Corporate AA or Better Bond Index and a
35% weighting in a blended equity composite (75% Standard & Poor's/BARRA Value
Index, 12.5% Standard & Poor's Utilities Index, and 12.5% Standard & Poor's
Telephone Index).
    
 
LEHMAN LONG-TERM CORPORATE AA OR BETTER BOND INDEX -- consists of all publicly
issued, fixed rate, nonconvertible investment grade, dollar denominated,
SEC-registered corporate debt rated AA or AAA.
 
RUSSELL 2000 STOCK INDEX -- consists of the smallest 2,000 stocks within the
Russell 3000; a widely-used benchmark for small capitalization common stocks.
 
LEHMAN BROTHERS AGGREGATE BOND INDEX -- is a market weighted index that contains
individually priced U.S. Treasury, agency, corporate, and mortgage pass-through
securities corporate rated BBB- or better. The Index has a market value of over
$4 trillion.
 
   
LEHMAN BROTHERS MUTUAL FUND SHORT (1-5) GOVERNMENT/CORPORATE INDEX -- is a
market weighted index that contains individually priced U.S. Treasury, agency,
and corporate investment grade bonds rated BBB- or better with maturities
between 1 and 5 years. The index has a market value of over $1.6 trillion.
    
 
   
LEHMAN BROTHERS MUTUAL FUND INTERMEDIATE (5-10) GOVERNMENT/CORPORATE INDEX -- is
a market weighted index that contains individually priced U.S. Treasury, agency,
and corporate securities rated BBB- or better with maturities between 5 and 10
years. The index has a market value of over $700 billion.
    
 
LEHMAN BROTHERS MUTUAL FUND LONG (10+) GOVERNMENT/CORPORATE INDEX -- is a market
weighted index that contains individually priced U.S. Treasury, agency, and
corporate securities rated Baa- or better with maturities greater than 10 years.
The index has a market value of over $900 billion.
 
LIPPER BALANCED FUND AVERAGE -- an industry benchmark of average balanced funds
with similar investment objectives and policies, as measured by Lipper
Analytical Services, Inc.
 
LIPPER NON-GOVERNMENT MONEY MARKET FUND AVERAGE -- an industry benchmark of
average non-government money market funds with similar investment objectives and
policies, as measured by Lipper Analytical Services, Inc.
 
LIPPER GOVERNMENT MONEY MARKET FUND AVERAGE -- an industry benchmark of average
government money market funds with similar investment objectives and policies,
as measured by Lipper Analytical Services, Inc.
 
                                      B-15
<PAGE>   103
 
LIPPER SMALL COMPANY GROWTH FUND AVERAGE -- the average performance of small
company growth funds as defined by Lipper Analytical Services, Inc. Lipper
defines a small company growth fund as a fund that by prospectus or portfolio
practice, limits its investments to companies on the basis of the size of the
company. From time to time, Vanguard may advertise using the average performance
and/or the average expense ratio of the small company growth funds. (This fund
category was first established in 1982. For years prior to 1982, the results of
the Lipper Small Company Growth category were estimated using the returns of the
Funds that constituted the Group at its inception.)
 
RUSSELL 3000 INDEX -- consists of approximately the 3,000 largest stocks of
U.S.-domiciled companies commonly traded on the New York and American Stock
Exchanges or the NASDAQ over-the-counter market, accounting for over 90% of the
market value of publicly traded Stocks in the U.S.
 
     Advertisements which refer to the use of the fund as a potential investment
for Individual Retirement Accounts may quote a total return based upon
compounding of dividends on which it is presumed no Federal income tax applies.
 
     In assessing such comparisons of yields, an investor should keep in mind
that the composition of the investments in the reported averages is not
identical to the Fund's Portfolio and that the items included in the
calculations of such averages may not be identical to the formula used by the
Fund to calculate its yield. In addition there can be no assurance that the
Fund will continue its performance as compared to such other averages.
 
                             YIELD AND TOTAL RETURN
 
   
     The yield* of each Portfolio of the Fund for the 30-day period ended July
31, 1997 was as follows:
    
 
   
<TABLE>
                  <S>                                                     <C>
                  Energy Portfolio.....................................    1.38%
                  Gold & Precious Metals Portfolio.....................      N/A
                  Health Care Portfolio................................    1.19%
                  Utilities Income Portfolio...........................    4.58%
                  Vanguard REIT Index Portfolio........................      N/A
</TABLE>
    
 
                -------------------------------
                *Yield is calculated daily.
 
   
     The average annual total return of each Portfolio of the Fund for the one-
and five-year periods ended July 31, 1997 and since the inception of each
Portfolio was as follows.
    
 
   
<TABLE>
<CAPTION>
                                                 YEAR ENDED        FIVE YEARS ENDED
                                              JANUARY 31, 1997     JANUARY 31, 1997     SINCE INCEPTION*
                                              ----------------     ----------------     -----------------
    <S>                                       <C>                  <C>                  <C>
    Energy Portfolio........................       +40.32%              +18.75%              +13.66%
    Gold & Precious Metals Portfolio........      - 20.51%              + 5.17%              + 3.95%
    Health Care Portfolio...................       +20.65%              +17.79%              +21.70%
    Utilities Income Portfolio..............       + 5.51%                   --              +11.77%
    Vanguard REIT Index Portfolio...........       +30.33%                                        --
</TABLE>
    
 
   
     --------------------
     *Inception for Vanguard REIT Index Portfolio, May 13, 1996; Inception for
      Utilities Income Portfolio, May 15, 1992; inception for all other
      Portfolios, May 23, 1984.
    
 
     Total return is computed by finding the average compounded rate of return
over the one-year period set forth above that would equate an initial amount
invested at the beginning of the period to the ending redeemable value of the
investment.
 
                              FINANCIAL STATEMENTS
 
   
     The Fund's financial statements for the year ended January 31, 1997,
including the financial highlights for each of the periods presented ended
January 31, 1997, as applicable, appearing in the Vanguard Specialized
Portfolios Annual Report to Shareholders, and the report thereon of Price
Waterhouse LLP, independent accountants, also appearing therein, are
incorporated by reference in this Statement of Additional Information. The
Fund's 1997 Annual Report to Shareholders is enclosed with this Statement of
Additional Information.
    
 
                                      B-16
<PAGE>   104
 
                                     PART C
                     VANGUARD SPECIALIZED PORTFOLIOS, INC.
                               OTHER INFORMATION
 
ITEM 24. FINANCIAL STATEMENTS AND EXHIBITS
     (a) FINANCIAL STATEMENTS
 
   
     The Fund's financial statements for the year ended January 31, 1997,
including the financial highlights for each of the periods presented ended
January 31, 1997, as applicable, appearing in the Fund's 1997 Annual Report to
Shareholders, and Price Waterhouse LLP's report thereon, also appearing therein,
are incorporated by reference in the Statement of Additional Information. The
financial statements included in the Annual and Semi-Annual Reports are:
    
 
   
     1. Statement of Net Assets as of January 31, 1997.
    
   
     2. Statement of Operations for the year ended January 31, 1997.
    
   
     3. Statement of Changes in Net Assets for each of the periods ended January
        31, 1996 and 1997.
    
   
     4. Financial Highlights for each of the five years in the period ended
        January 31, 1997 for the Energy, Gold & Precious Metals, and the Health
        Care Portfolios, and from May 15, 1992 to January 31, 1993 and for each
        of the four years in the period ended January 31, 1997 for the Utilities
        Income Portfolio and for the period May 13, 1996 to January 31, 1997 for
        the Vanguard REIT Index Portfolio.
    
     5. Notes to Financial Statements.
     6. Report of Independent Accountants.*
 
     --------------------
      * Appears in Annual Report only.
 
     (b) EXHIBITS
 
     1. Articles of Incorporation
     2. By-Laws of Registrant
     3. Not Applicable
     4. Not Applicable
     5. Not Applicable
     6. Not Applicable
     7. Reference is made to the section entitled "Management of the Fund" in
        the Registrant's Statement of Additional Information
     8. Form of Custody Agreement
   
     9. Form of Funds' Service Agreement
    
     10. Opinion of Counsel
     11. Consent of Independent Accountants*
     12. Financial Statements -- reference is made to (a) above
     16. Schedule for Computation of Performance Quotations*
     27. Financial Data Schedule*
 
     --------------------
      * Filed herewith
 
     ITEM 25. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT
 
     Registrant is not controlled by or under common control with any person.
The officers of the Registrant, the investment companies in The Vanguard Group
of Investment Companies and The Vanguard Group, Inc. are identical. Reference is
made to the caption "Management of the Fund" in the Prospectus constituting Part
A and in the Statement of Additional Information constituting Part B of this
Registration Statement.
 
                                       C-1
<PAGE>   105
 
ITEM 26. NUMBER OF HOLDERS OF SECURITIES
 
   
     As of July 31, 1997 the number of shareholders of each of the Fund's
portfolios was:
    
 
   
<TABLE>
         <S>                                                                    <C>
         Energy...............................................................   50,167
         Health Care..........................................................  168,067
         Gold & Precious Metals...............................................   36,093
         Utilities............................................................   40,984
         Vanguard REIT Index Portfolio........................................   30,129
</TABLE>
    
 
ITEM 27. INDEMNIFICATION
 
     Reference is made to Article XI of Registrant's Articles of Incorporation.
Insofar as indemnification for liability arising under the Securities Act of
1933 may be permitted to trustees, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a trustee, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
 
     Insofar as indemnification for liability arising under the Securities Act
of 1933 may be permitted to trustees, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the registrant of expenses incurred
or paid by a trustee, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
 
ITEM 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER
 
     Reference is made to the caption "Investment Advisers" in the prospectus
constituting Part A of this Registration Statement and "Investment Advisory
Services" in Part B of this Registration Statement.
 
   
     Wellington Management Company LLP, 75 State Street, Boston, MA 02109, is a
Massachusetts limited liability partnership, of which the following persons are
managing partners: Robert W. Doran, Duncan M. McFarland, and John R. Ryan.
    
 
   
     Wellington Management Company, LLP ("Wellington Management") is an
investment adviser registered under the Investment Advisers Act of 1940, as
amended (the "Advisers Act"). The list required by this Item 28 of officers and
partners of Wellington Management, together with any information as to any
business profession, vocation or employment of a substantial nature engaged in
by such officers and partners during the past two years, is incorporated herein
by reference to Schedules A and D of form ADV filed by Wellington Management
pursuant to the Advisers Act (SEC File No. 801-159089).
    
 
                                       C-2
<PAGE>   106
 
     Listed below are the names of, and office held by each of the Directors of
M & G Group P.L.C. The business address of each Director is Three Quays, Tower
Hill, London, England EC3R 6BQ.
 
<TABLE>
<S>                         <C>
DIRECTOR'S NAME             BUSINESS AND OTHER CONNECTIONS OF ADVISER
J. R. Caldecott             Director of the following companies:
                            Kleinwort, Benson Lonsdale P.L.C.
                            Chloride Group P.L.C.
                            Kleinwort, Benson Australia Limited
                            Kleinwort, Benson Australia (Holdings) Limited
                            M & G Securities Limited
                            M & G Limited
                            M & G Investment Management Limited
                            External Investment Trust, P.L.C.
                            M & G Second Dual Trust P.L.C.
                            Whitbread and Company P.L.C.
                            Electronic Rentals Group P.L.C.
                            Blue Circle Industries P.L.C.
D. H. L. Hopkinson          Director of the following companies:
                            M & G Investment Management Limited
                            British Railways (Southern) Board
                            Central Board of Finance of the Church of England
                            Charities Investment Managers Limited
                            Chichester Diocesan Fund and Board of Finance
                            English Chamber Orchestra and Music Society Limited
                            English China Clays P.L.C.
                            English China Clays Trustees
                            E.C.C. (Operatives) Pension Fund Trustees Limited
                            E.C.C. (SMT) Pension Fund Trustees Limited
                            E.C.C. (Staff) Pension Fund Trustees Limited
                            Exit Finance Limited
                            External Investment Trust P.L.C.
                            First British Fixed Trust Company Limited
                            Gill and Duffus Group P.L.C.
                            Jetmain Limited
                            Lloyds Bank Limited (Southern Regional Board)
                            M & G Dual Trust P.L.C.
                            M & G Financial Services Limited
                            M & G Leasing Limited
                            M & G Life Assurance Company Limited
                            M & G Limited
                            M & G Pension and Annuity Company Limited
                            M & G Second Dual Trust P.L.C.
                            M & G Securities Limited
                            Mencap Unit Trust Managers Limited
                            Merchants Trust P.L.C.
                            Raeburn Investment Trust P.L.C.
                            Romney Trust P.L.C.
                            United States Debenture Corporation P.L.C.
</TABLE>
 
                                       C-3
<PAGE>   107
 
<TABLE>
<S>                         <C>
J. S. Fairbairn             Director of the following companies:
                            M & G Limited
                            M & G Securities Limited
                            M & G Assurance Group Limited
                            M & G Life Assurance Company Limited
                            M & G Pensions and Annuity Company Limited
                            Island Trust Limited
                            Pioneer Trust Limited
                            M & G Friendly Society (Management Committee)
                            M & G Leasing Limited
                            M & G Trust Assurance (Channel Islands) Limited
                            M & G Financial Services Limited
K. F. W. Allsop             Director of the following companies:
                            M & G Financial Services Limited
                            M & G Assurance Group Limited
                            M & G Leasing Limited
                            M & G Limited
                            M & G Securities Limited
                            M & G Pensions and Annuity Company Limited
                            M & G Life Assurance Company Limited
R. A. Brooks                Director of the following companies:
                            Kleinwort, Benson Limited
                            Robert Benson, Lonsdale and Company Limited
                            Sharps, Pixley Limited
                            Kleinwort, Benson Property Management and Services Limited
                            Kleinwort, Benson Investment Management Limited
                            Sharps, Pixley Holdings Limited
                            The Trans-European Company Limited
                            Stoxsals Limited
                            Kleinwort, Benson International Holdings Limited
                            Equinox Shipping Company Limited
                            Kleinwort, Benson Overseas B.V.
                            Kleinwort, Benson Development Capital Limited
                            Kleinwort, Benson Finance B.V.
                            Commercial Union Assistance, P.L.C.
                            Stanley P. Morrison Limited
                            Sutton Manor Methan Limited
                            The Cross Investment Trust Limited
                            Railcar Finance Limited
                            Highway Finance Limited
                            Kleinwort, Benson International Leasing Limited
                            Kleinwort, Benson Leasing Limited
                            Miles Roman Limited
                            Kleinwort, Benson Investment Trust Limited
                            Fenchurch Navigation Corporation
                            Cross Investment Trust Limited
                            Southampton Freeport Limited
                            M & G Limited
R. G. Down                  Director of the following companies:
                            Oil and Gas Production
                            Australian Farming Property Company Limited
                            Folkestone (Australia) Limited
                            Europa Petroleum Limited
</TABLE>
 
                                       C-4
<PAGE>   108
 
<TABLE>
<S>                         <C>
L. E. Linaker               Director of the following companies:
                            M & G Securities Limited
                            M & G Dual Trust P.L.C.
                            External Investment Trust P.L.C.
                            Exit Finance Limited
                            M & G Limited
                            M & G Second Dual Trust P.L.C.
                            M & G Friendly Society (Management Committee)
                            M & G Investment Management Limited
                            The Brunner Investment Trust Limited
                            Second Exit Finance Limited
                            Charities Investment Managers Limited
C. A. McLintock             Director of the following companies:
                            Allchurches Trust Limited
                            Border and Southern Stockholders Trust P.L.C.
                            Bramley Educational Trust
                            Ecclesiastical Holdings P.L.C.
                            Ecclesiastical Insurance Office P.L.C.
                            EIO Trustees Limited
                            Beaufort House Trust Limited
                            Pendle Insurance Company Limited
                            Lake View Investment Trust P.L.C.
                            M & G Limited
                            Muir Investments Limited
                            National Westminster Bank P.L.C.
                            Pigott Properties Limited
                            Queen Street Nominees Limited
                            Reres Trust Limited
                            Sakers Finance and Investment Corporation Limited
                            Stockholders Investment Trust P.L.C.
                            Westonbirt School Limited
                            Woolwich Equitable Building Society
D. A. E. R. Peake           Director of the following companies:
                            Kleinwort, Benson Limited
                            Fendrake Limited
                            Kleinwort, Benson (Middle East) E.C.
                            Kleinwort, Benson (Europe) S.A.
                            Nuclear Fuel Finance S.A.
                            Kleinwort, Benson Project Services Limited
                            Cross S.A.
                            Bolnore Estates Limited
                            Chevy Chase Property Company Limited
                            Clippwake Limited
                            Banque Nationale de Paris P.L.C.
                            Hargreaves Group P.L.C.
                            Societe Financiere Franco Britanique S.A.
                            Heythrop Hunt Kennels Limited
                            Daviford Investments Limited
                            Sezincote Trustees Limited
                            M & G Limited
</TABLE>
 
                                       C-5
<PAGE>   109
 
<TABLE>
<S>                         <C>
Lord Michael Swann          Director of the following company:
                            New Court Natural Resources P.L.C.s
D. L. Tucker                Director of the following companies:
                            Barnard's University Bookshop Limited
                            External Investment Trust P.L.C.
                            Exit Finance Limited
                            M & G Investment Management Limited
                            M & G Securities Limited
                            Timepost Limited
                            M & G Limited
</TABLE>
 
ITEM 29. PRINCIPAL UNDERWRITERS
 
          (a) None
 
          (b) Not Applicable
 
ITEM 30. LOCATION OF ACCOUNTS AND RECORDS
 
     The books, accounts and other documents required by Section 31(a) under the
Investment Company Act and the rules promulgated thereunder will be maintained
in the physical possession of Registrant; Registrant's Transfer Agent, The
Vanguard Group, Inc. c/o The Vanguard Financial Center, Valley Forge,
Pennsylvania 19482; and the Registrant's Custodian, State Street Bank and Trust
Company, 225 Franklin Street, Boston, Massachusetts 02105 for the Health Care,
Energy, and Utilities Income Portfolios; and Morgan Guaranty Trust Company of
New York, 23 Wall Street, New York, New York 10015 for the Gold & Precious
Metals Portfolio.
 
ITEM 31. MANAGEMENT SERVICES
 
     Other than the Amended and Restated Funds' Service Agreement with The
Vanguard Group, Inc. which was previously filed as Exhibit 9(c) and described in
Part B hereof under "Management of the Fund;" the Registrant is not a party of
any management-related service contract.
 
ITEM 32. UNDERTAKINGS
 
     Registrant hereby undertakes to comply with the provisions of Section 16(c)
of the 1940 Act in regard to shareholders' right to call a meeting of
shareholders for the purpose of voting on the removal of directors and to assist
in shareholder communications in such matters, to the extent required by law.
 
     Registrant hereby undertakes to provide an Annual Report to Shareholders or
prospective investors, free of charge, upon request.
 
                                       C-6
<PAGE>   110
 
                                   SIGNATURES
 
   
     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant hereby certifies that it meets
all the requirements for effectiveness of this Registration Statement pursuant
to Rule 485(b) under the Securities Act of 1933 and has duly caused this
Post-Effective Amendment to this Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the Town of Valley
Forge and the Commonwealth of Pennsylvania, on the 23rd day of May, 1997.
    
 
    VANGUARD SPECIALIZED PORTFOLIOS, INC.
 
BY: (Raymond J. Klapinsky) John J. Brennan, President and Chief Executive
    Officer
 
     Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment to the Registration Statement has been signed below by
the following persons in the capacities and on the date indicated:
 
BY: (Raymond J. Klapinsky)
    John C. Bogle*, Chairman of the Board and Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    John J. Brennan*, President, Chief Executive Officer and Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Robert E. Cawthorn*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Barbara B. Hauptfuhrer*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Bruce K. MacLaury*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Barton G. Malkiel*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Alfred M. Rankin, Jr.*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    John C. Sawhill*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    James O. Welch, Jr.*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    J. Lawrence Wilson*, Director
   
    May 23, 1997
    
 
BY: (Raymond J. Klapinsky)
    Richard F. Hyland*, Treasurer and Principal
    Financial Officer and Accounting Officer
   
    May 23, 1997
    
- ---------------
*By Power of Attorney. See File Number 2-14336, January 23, 1990. Incorporated
by Reference.
<PAGE>   111
 
                               INDEX TO EXHIBITS
 
<TABLE>
<S>                                                                                   <C>
Consent of Independent Accountants..................................................   EX-99.B11
Schedule for Computation of Performance Quotations..................................   EX-99.B16
Financial Data Schedule.............................................................       EX-27
</TABLE>

<PAGE>   1
 
                                                                       EX-99.B11
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
   
     We hereby consent to the incorporation by reference in the Prospectuses and
Statement of Additional Information constituting parts of this Post-Effective
Amendment No. 23 to the registration statement on Form N-1A (the "Registration
Statement") of our report dated February 28, 1997, relating to the financial
statements and financial highlights appearing in the January 31, 1997 Annual
Report to Shareholders of Vanguard Specialized Portfolios, Inc. (comprised of
Energy, Gold & Precious Metals, Health Care, Utilities Income and Vanguard REIT
Index Portfolios), which are also incorporated by reference into the
Registration Statement. We also consent to the references to us under the
headings "Financial Highlights" and "General Information" in the prospectuses
and under the heading "Financial Statements" in the Statement of Additional
Information.
    
 
PRICE WATERHOUSE LLP
Philadelphia, PA
   
May 22, 1997
    

<PAGE>   1
 
                                                                       EX-99.B16
 
               SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATIONS
                        VANGUARD SPECIALIZED PORTFOLIOS
                                ENERGY PORTFOLIO
 
   
1. Average Annual Total Return (As of January 31, 1997)
        P (1 + T)to the nth power = ERV
    
 
   
<TABLE>
<S>          <C>     <C>
     Where:  P = a hypothetical initial payment of $1,000
             T = average annual total return
             N = number of years
           ERV = ending redeemable value at the end of the period
    EXAMPLE:
      One Year
           P =   $1,000
           T =   +40.32%
           N =   1
         ERV =   $1,403.20
     Five Year
           P =   $1,000
           T =   +18.74%
           N =   5
         ERV =   $2,360.41
      Ten Year
           P =   $1,000
           T =   +13.66%
           N =   10
         ERV =   $3,793.99
</TABLE>
    
 
   
2. YIELD (30 Days Ended January 31, 1997)
    
 
                  Yield = 2[((a-b/cxd)+1)to the 6th power-1]
                        -------------------------

 
   
<TABLE>
    <C>          <S>
        Where:   a = dividends and interest paid during the period
                 b = expenses during the period (net of reimbursements)
                 c = the average daily number of shares outstanding during the period
                 d = the maximum offering price per share on the last day of the period

    Example     a = $1,366,997.41
                b = $292,059.88
                c =  39,904,868.360
                d = $23.44
             Yield =  1.38%
</TABLE>
    
<PAGE>   2
 
                                                                       EX-99.B16
 
               SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATIONS
                        VANGUARD SPECIALIZED PORTFOLIOS
                                 GOLD PORTFOLIO
 
   
1. Average Annual Total Return (As of January 31, 1997)
        P (1 + T)to the nth power = ERV
    
 
   
<TABLE>
<S>          <C>     <C>
     Where:  P = a hypothetical initial payment of $1,000
             T = average annual total return
             N = number of years
           ERV = ending redeemable value at the end of the period
    EXAMPLE:
      One Year
           P =   $1,000
           T =   -20.51%
           N =   1
         ERV =   $794.95
     Five Year
           P =   $1,000
           T =   +5.17%
           N =   5
         ERV =   $1,286.35
      Ten Year
           P =   $1,000
           T =   +3.95%
           N =   10
         ERV =   $1,498.40
</TABLE>
    
<PAGE>   3
 
                                                                       EX-99.B16
 
               SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATIONS
                        VANGUARD SPECIALIZED PORTFOLIOS
                             HEALTH CARE PORTFOLIO
 
   
1. Average Annual Total Return (As of January 31, 1997)
        P (1 + T)to the nth power = ERV
    
 
   
<TABLE>
<S>          <C>     <C>
     Where:  P = a hypothetical initial payment of $1,000
             T = average annual total return
             N = number of years
           ERV = ending redeemable value at the end of the period
    EXAMPLE:
      One Year
           P =   $1,000
           T =   +20.65%
           N =   1
         ERV =   $1,206.46
     Five Year
           P =   $1,000
           T =   +17.79%
           N =   5
         ERV =   $2,267.22
      Ten Year
           P =   $1,000
           T =   +21.70%
           N =   10
         ERV =   $5,788.34
</TABLE>
    
 
   
2. YIELD (30 Days Ended January 31, 1997)
    
 
                  Yield = 2[((a-b/cxd)+1)to the 6th pwer-1]
 
   
<TABLE>
    <C>          <S>
        Where:   a = dividends and interest paid during the period
                 b = expenses during the period (net of reimbursements)
                 c = the average daily number of shares outstanding during the period
                 d = the maximum offering price per share on the last day of the period

    Example     a = $3,658,514.60
                b = $893,616.69
                c =  46,183,744.286
                d = $60.65
             Yield =  1.19%
</TABLE>
    
<PAGE>   4
 
                                                                       EX-99.B16
 
               SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATIONS
                        VANGUARD SPECIALIZED PORTFOLIOS
                              REIT INDEX PORTFOLIO
 
   
1. Average Annual Total Return (As of January 31, 1997)
        P (1 + T) to the ninth power = ERV
    
 
   
<TABLE>
<S>          <C>
     Where:   P = a hypothetical initial payment of $1,000
              T = average annual total return
              N = number of years
            ERV = ending redeemable value at the end of the period

EXAMPLE:
       P =  $1,000
       T =  +30.33%
       N =  *
     ERV =  $1,303.27

</TABLE>
    

 
   
* Since inception on May 13, 1996.
    
<PAGE>   5
 
                                                                       EX-99.B16
 
               SCHEDULE FOR COMPUTATION OF PERFORMANCE QUOTATIONS
                        VANGUARD SPECIALIZED PORTFOLIOS
                           UTILITIES INCOME PORTFOLIO
 
   
1. Average Annual Total Return (As of January 31, 1997)
        P (1 + T) to the ninth power = ERV
    
 
   
<TABLE>
<S>          <C>
     Where:  P = a hypothetical initial payment of $1,000
             T = average annual total return
             N = number of years
             ERV = ending redeemable value at the end of the period
EXAMPLE:
  One Year
       P =   $1,000
       T =   +5.51%
       N =   1
     ERV =   $1,055.14
 Five Year
       P =   $1,000
       T =   +11.77%
       N =   *
     ERV =   $1,689.89
</TABLE>
    
 
    *Since inception May 15, 1992

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000734383
<NAME> VANGUARD SPECIALIZED PORTFOLIOS, INC.
<SERIES>
   <NUMBER> 01
   <NAME> ENERGY PORTFOLIO
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS
   
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          JAN-31-1997
<PERIOD-START>                             FEB-01-1996
<PERIOD-END>                               JAN-31-1997
<EXCHANGE-RATE>                                      1
<INVESTMENTS-AT-COST>                          779,613
<INVESTMENTS-AT-VALUE>                       1,039,859
<RECEIVABLES>                                   11,143
<ASSETS-OTHER>                                      75
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               1,051,077
<PAYABLE-FOR-SECURITIES>                        53,366
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        8,262
<TOTAL-LIABILITIES>                             61,628
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       719,732
<SHARES-COMMON-STOCK>                           42,215
<SHARES-COMMON-PRIOR>                           29,372
<ACCUMULATED-NII-CURRENT>                          388
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                          9,083
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       260,246
<NET-ASSETS>                                   989,449
<DIVIDEND-INCOME>                                9,329
<INTEREST-INCOME>                                2,344
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                   2,599
<NET-INVESTMENT-INCOME>                          9,074
<REALIZED-GAINS-CURRENT>                        23,933
<APPREC-INCREASE-CURRENT>                      191,764
<NET-CHANGE-FROM-OPS>                          224,771
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        8,648
<DISTRIBUTIONS-OF-GAINS>                        14,413
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         19,911
<NUMBER-OF-SHARES-REDEEMED>                      8,060
<SHARES-REINVESTED>                                992
<NET-CHANGE-IN-ASSETS>                         484,402
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                             39
<OVERDIST-NET-GAINS-PRIOR>                         436
<GROSS-ADVISORY-FEES>                              644
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  2,630
<AVERAGE-NET-ASSETS>                           669,536
<PER-SHARE-NAV-BEGIN>                            17.19
<PER-SHARE-NII>                                   0.25
<PER-SHARE-GAIN-APPREC>                           6.64
<PER-SHARE-DIVIDEND>                              0.24
<PER-SHARE-DISTRIBUTIONS>                         0.40
<RETURNS-OF-CAPITAL>                                 0
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<S>                             <C>
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<NAME> VANGUARD SPECIALIZED PORTFOLIOS, INC.
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<TABLE> <S> <C>

<ARTICLE> 6
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<NAME> VANGUARD SPECIALIZED PORTFOLIOS, INC.
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</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000734383
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   <NAME> REIT INDEX PORTFOLIO
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