ARIEL GROWTH FUND
485APOS, 1995-08-29
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549
                            ________________________

                                   FORM N-1A

                        REGISTRATION STATEMENT UNDER THE
                             SECURITIES ACT OF 1933

                            REGISTRATION NO. 33-7699

                        Post-Effective Amendment No. 16

                                      and

                        REGISTRATION STATEMENT UNDER THE
                         INVESTMENT COMPANY ACT OF 1940

                           REGISTRATION NO. 811-4786

                                Amendment No. 16

                               ARIEL GROWTH FUND
                               -----------------

                           307 North Michigan Avenue
                            Chicago, Illinois  60601

               Registrant's Telephone Number, Including Area Code

                                 1-312-726-0140

                               Agent for Service:

                                Sheldon R. Stein
                               D'Ancona & Pflaum
                            30 North LaSalle Street
                            Chicago, Illinois  60602
                                 (312) 580-2014

     It is proposed that this filing will become effective:

     _____  Immediately upon filing pursuant to paragraph (b)
     _____  on (date) pursuant to paragraph (b)
     _____  60 days after filing pursuant to paragraph (a)(1)
       X    on October 27, 1995, pursuant to paragraph (a)(1)
     -----                                                    
     _____  75 days after filing pursuant to paragraph (a)(2)
     _____  on (date) pursuant to paragraph (a)(2) of Rule 485


     Registrant has registered an indefinite number of shares of its beneficial
interest pursuant to Rule 24f-2, and filed its Rule 24f-2 Notice for its fiscal
year ended September 30, 1994 on or about November 28, 1994.
<PAGE>
 
                     CROSS REFERENCE SHEET WITH RESPECT TO
           INSTITUTIONAL CLASS SHARES OF THE ARIEL PERMIER BOND FUND


  N-1A
Item No.         Prospectus Caption or Placement
- --------         -------------------------------

  1              Front Cover
  2              Fund Expenses For Institutional Class Shares
  3              Total Return, Yield and Other Performance Information
  4              Front Cover; Investment Objective,
                 Policies and Risk Factors; Management and Organization of the
                 Fund
  5              Management and Organization of the Fund
  6              Front Cover; Management and Organization of the Fund;
                 Dividends, Capital Gains and Taxes; Certain Shareholders of the
                 Fund
  7              How to Buy Shares; Net Asset Value; Exchanging Shares;
                 Management and Organization of the Fund
  8              Redeeming Shares; Exchanging Shares
  9              (Not Applicable)


                 Part B Caption or Placement
                 ---------------------------

  10             Cover Page
  11             Table of Contents
  12             (Not Applicable)

  13             Fundamental Investment Restrictions; Non-Fundamental Investment
                 Restrictions; Additional Information About Investment
                 Techniques; Portfolio Transactions; Appendix

  14             Trustees and Officers
  15             Trustees and Officers; Certain Shareholders of the Fund (in the
                 Prospectus)
  16             Investment Adviser, Sub-Adviser and Services Administrator;
                 Transfer Agent and Custodian; Independent Auditors
  17             Portfolio Transactions
  18             General Information
  19             Net Asset Value (in the Prospectus)
  20             Special Tax Matters
  21             Manager, Sub-Adviser and Services Administrator
  22             Calculation of Yield and Total Return
  23             (Not Applicable)
<PAGE>
 
                     CROSS REFERENCE SHEET WITH RESPECT TO
              INVESTOR CLASS SHARES OF THE ARIEL PERMIER BOND FUND


    N-1A
  Item No.       Prospectus Caption or Placement
  --------       -------------------------------

     1           Front Cover
     2           Fund Expenses For Investor Class Shares
     3           Total Return, Yield and Other Performance Information
     4           Front Cover; Investment Objective,
                 Policies and Risk Factors; Management and Organization of the
                 Fund
     5           Management and Organization of the Fund; Distribution Plan
     6           Front Cover; Management and Organization of the Fund;
                 Dividends, Capital Gains and Taxes; Distribution Plan; Certain
                 Shareholders of the Fund
     7           How to Buy Shares; Net Asset Value; Exchanging Shares;
                 Management and Organization of the Fund; Distribution Plan
     8           Redeeming Shares; Exchanging Shares
     9           (Not Applicable)


                 Part B Caption or Placement
                 ---------------------------

    10           Cover Page
    11           Table of Contents
    12           (Not Applicable)
                 
    13           Fundamental Investment Restrictions; Non-Fundamental Investment
                 Restrictions; Additional Information About Investment
                 Techniques; Portfolio Transactions; Appendix
                 
    14           Trustees and Officers
    15           Trustees and Officers; Certain Shareholders of the Fund (in the
                 Prospectus)
    16           Investment Adviser, Sub-Adviser and Services Administrator;
                 Transfer Agent and Custodian; Independent Auditors
    17           Portfolio Transactions
    18           General Information
    19           Net Asset Value (in the Prospectus)
    20           Special Tax Matters
    21           Method of Distribution of the Class B Shares
    22           Calculation of Yield and Total Return
    23           (Not Applicable)
<PAGE>
 
                  
                  SUBJECT TO COMPLETION DATED AUGUST 28, 1995      


            PROSPECTUS
            FOR INSTITUTIONAL CLASS SHARES      
                                  ______, 1995

            ARIEL MUTUAL FUNDS
               ARIEL PREMIER BOND FUND
            307 NORTH MICHIGAN AVENUE, SUITE 500, CHICAGO, ILLINOIS 60601

    
     The Ariel Premier Bond Fund (the "Fund") is a series of Ariel Growth Fund
     (doing business as Ariel Investment Trust) (the "Trust").  Ariel Capital
     Management, Inc. (the "Adviser") is the Manager and Administrator of the
     Fund.  Lincoln Capital Management Company ("Lincoln Capital") is the Fund's
     Sub-Adviser responsible for the day to day investment operations.      
    
     The Fund currently offers one class of shares, the Institutional Class.
     These shares are offered primarily to institutional investors and are not
     subject to Rule 12b-1 distribution fees.  Upon receipt of the necessary
     regulatory approvals, the Fund expects to offer a second class of shares,
     the Investor Class, under a separate prospectus.  The Investor Class, which
     will bear higher administrative expenses and will be subject to Rule 12b-1
     distribution fees, will be sold to the general public directly and through
     broker-dealers.      

INVESTMENT OBJECTIVE
    
     The Fund seeks to maximize total return through a combination of income and
     capital appreciation.  The Fund generally invests in high quality, highly
     liquid fixed-income securities.  Normally, at least 80% of the Fund's total
     assets will be invested in fixed-income securities rated A or better by a
     nationally recognized securities rating organization (or deemed the
     equivalent by Lincoln Capital, if unrated).  The Fund seeks to achieve its
     investment objective by implementing decisions regarding the level and
     direction of interest rates (duration and yield curve decisions) and
     through the purchase and sale of securities to take advantage of perceived
     yield spread opportunities.      

ABOUT THIS PROSPECTUS

     This prospectus sets forth important information concerning the Ariel
     Premier Bond Fund.  Please read it carefully before investing and keep it
     for future reference.  It is designed to provide you with information you
     should know before investing and to help you decide if the goals of the
     Fund match your own.

     A Statement of Additional Information (dated ______, 1995) for the Fund has
     been filed with the Securities and Exchange Commission and (together with
     any supplement thereto) is incorporated herein by reference.  This
     Statement is available upon request from the Fund by calling 1-800-29-ARIEL
     (1-800-292-7435).

     SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS  OF, OR GUARANTEED  OR
     ENDORSED BY,  ANY  BANK, AND ARE NOT FEDERALLY  INSURED BY THE FDIC, THE
     FEDERAL  RESERVE  BOARD, OR ANY  OTHER  AGENCY.

     THESE SECURITIES HAVE  NOT BEEN APPROVED  OR DISAPPROVED  BY THE SECURITIES
     AND EXCHANGE COMMISSION OR ANY STATE  SECURITIES COMMISSION, NOR HAS THE
     FEDERAL OR ANY  STATE  SECURITIES COMMISSION PASSED ON THE ACCURACY OR
     ADEQUACY  OF THIS PROSPECTUS.  ANY REPRESENTATION  TO THE CONTRARY  IS A
     CRIMINAL  OFFENSE.
    
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission but has not yet become effective. These
     securities may not be sold nor may offers to buy be accepted prior to the
     time the registration statement becomes effective. This prospectus shall
     not constitute an offer to sell or the solicitation of an offer to buy nor
     shall there be any sale of these securities in any State in which such
     offer, solicitation or sale would be unlawful prior to registration or
     qualification under the securities laws of any State.     
<PAGE>
 
<TABLE>   
<CAPTION>
TABLE OF CONTENTS                                        PAGE(S)
<S>                                                      <C>
 
Fund Expenses for Institutional Class Shares...........     3
 
Investment Objective, Policies and Risk Factors........     4
 
Management and Organization of the Fund................    13
 
How to Buy Shares......................................    17
 
Net Asset Value........................................    19
 
When Your Account Will Be Credited.....................    19
 
Exchanging Shares......................................    20
 
Redeeming Shares.......................................    22
 
Dividends, Capital Gains and Taxes.....................    24
 
Certain Shareholders of the Fund.......................    26
 
Total Return, Yield and Other Performance Information..    26
</TABLE>     

                                       2
<PAGE>
 
     
FUND EXPENSES FOR INSTITUTIONAL CLASS SHARES      

SHAREHOLDER TRANSACTION COSTS
<TABLE>
<S>                                                <C>
     Maximum Sales Load on Purchases               None
     Maximum Sales Load on Reinvested Dividends    None
     Deferred Sales Load                           None
     Redemption Fee                                None
     Exchange Fee                                  None
 
</TABLE>
    
ANNUAL FUND OPERATING EXPENSES FOR INSTITUTIONAL CLASS SHARES (AS A PERCENTAGE
OF AVERAGE NET ASSETS) (1):      

<TABLE>    
<S>                                  <C>
Management Fees                      0.58%
12b-1 Fees                           0.00%
Other Expenses (2)                   0.00%
                                     ----
Total Fund Operating Expenses (2)    0.58%
</TABLE>      
    
(1) The Fund's operating expenses are annualized and are estimated for the
fiscal year ending September 30, 1996.  Please refer to the section "Management
and Organization of the Fund" for further information.      
    
(2)  Pursuant to an Investment Advisory Agreement and an Administrative Services
Agreement, the Adviser pays all expenses of the Fund except fees under the
Agreements, interest, taxes, brokerage commissions and extraordinary expenses.
     
    
EXAMPLE:      

We can illustrate these expenses with the example below. You would pay the
following expenses on a $1,000 investment (assuming a 5% annual return and
redemption at the end of each period):

<TABLE>     
<S>            <C>
One Year        $ 5.95
                ------
Three Years     $18.60
                ------
</TABLE>     
    
Explanation of Table: The purpose of the table is to assist you in understanding
the various costs and expenses that an investor in the Institutional Class of
the Fund would bear directly (shareholder transaction costs) or indirectly
(annual fund operating expenses).  The information is based on amounts for the
Fund's first fiscal period.      

                                       3
<PAGE>
 
THE 5% RATE USED IN THE EXAMPLE IS FOR ILLUSTRATION ONLY AND IS NOT INTENDED TO
BE INDICATIVE OF THE FUTURE PERFORMANCE OF THE FUND, WHICH MAY BE MORE OR LESS
THAN THE ASSUMED RATE.  ACTUAL EXPENSES MAY BE MORE OR LESS THAN THOSE SHOWN.

                                       4
<PAGE>
 
    
            INVESTMENT OBJECTIVE, POLICIES AND RISK FACTORS      

THE FUND SEEKS TO MAXIMIZE TOTAL RETURN.

INVESTMENT OBJECTIVE
    
            The investment objective of the Fund is to seek to maximize total
            return through a combination of income and capital appreciation.
            The Fund generally invests in high quality, highly liquid fixed-
            income securities.  Normally, the Fund will invest at least 80% of
            its total assets in fixed-income securities rated A or better by
            Moody's Investors Service, Inc. ("Moody's") or Standard and Poor's
            Corporation ("S & P") or that are not rated by Moody's or S & P but
            are deemed to be of comparable quality by Lincoln Capital ("A-Grade
            Securities").  In the event that downgrades of securities cause less
            than 80% of the Fund's total assets to be invested in A-Grade
            Securities, Lincoln Capital will take steps as soon as practicable
            to increase the Fund's holdings of A-Grade Securities.  The Fund
            seeks to achieve its investment objective by implementing decisions
            regarding the level and direction of interest rates (duration and
            yield curve decisions) and through the purchase and sale of
            securities to take advantage of perceived yield spread
            opportunities.      
    
            The Fund may purchase any type of income producing security
            including, but not limited to, U.S. government and agency
            obligations, mortgage-backed and other asset-backed securities,
            commercial paper and corporate debt securities.  As a part of its
            overall investment strategy for the Fund, Lincoln Capital may use
            derivatives.  Derivatives are financial instruments whose value and
            performance are based on the value and performance of another
            security or financial instrument.  The risk of investments in
            derivatives varies with the type of derivative strategy used.
            Lincoln Capital will not purchase derivatives whose value is based
            on instruments in which the Fund could not invest directly.
            Derivative strategies are most often used to assist Lincoln Capital
            in establishing its desired duration and yield curve positions as
            described more fully below.  See "Additional Use of Derivatives" for
            more information.      

            The Fund will take reasonable risks in seeking to achieve its
            investment objective. There is, of course, no assurance that the
            Fund will be successful in meeting its objective since there is risk
            involved in the ownership of securities.

DURATION

            Duration is a measure of the expected life of a fixed-income
            security that was developed as a more precise alternative to the
            concept of term-to-maturity.  Duration incorporates a bond's yield,
            coupon interest payments, final maturity and call features into one
            measure.  Duration is also a way to measure the interest-rate
            sensitivity of the Fund's portfolio.   The duration of the Fund is
            calculated by averaging the durations of the bonds held by the Fund
            with each duration "weighted" according to the percentage of net
            assets that it represents.  In general, the higher the Fund's
            duration, the greater the appreciation or depreciation of the Fund's
            assets will be when interest rates change.  In its attempt to
            maximize total return, Lincoln Capital intends to vary the duration
            of the Fund, as described below, depending on its outlook for
            interest rates.

                                       5
<PAGE>
 
INVESTMENT PROCESS

            Interest Rate Decisions

            Lincoln Capital seeks to achieve a duration equal to the duration of
            the domestic, investment grade bond market when its outlook for
            interest rates is neutral.  The portfolio's average duration will be
            longer when Lincoln Capital believes that interest rates will fall
            and shorter when it believes interest rates will rise.  The stronger
            Lincoln Capital's conviction, the further the Fund's duration will
            diverge from the duration of the domestic, investment grade bond
            market, which generally averages approximately five years.  The
            Fund's duration will normally range from four to six years.  It is
            expected that only on rare occasions will the Fund's duration reach
            the extreme positions (plus or minus 2 years from the duration of
            the domestic, investment grade bond market).

            The Fund's duration relative to that of the domestic, investment
            grade bond market is established in periodic strategy meetings of a
            committee consisting of senior officers of Lincoln Capital.  Changes
            in the Fund's duration are based on a disciplined valuation of three
            factors:

            (a) Economic activity and capacity for growth;
            (b) U.S. Government monetary policy; and
            (c)  Expectations for inflation.

            The committee evaluates the above factors and weights each one to
            determine a precise duration position relative to the duration of
            the domestic, investment grade bond market.  Over time, changes in
            the duration position take the form of a series of small movements;
            generally in one-half year increments.
    
            Once the Fund's specific duration position has been established,
            remaining decisions (i.e. yield curve structure, sector emphasis and
            issue selections), are made and implemented by Lincoln Capital's
            Fixed Income Group working as a team.  These decisions are based on
            Lincoln Capital's belief that yield spreads reflect fundamental risk
            premiums.  The premiums reflect compensation for accepting credit
            risk or uncertain cash flow patterns (timing and amounts).  Lincoln
            Capital's judgments on these spreads are influenced by its outlook
            for business conditions and for the volatility of interest rates.
            These judgments are supported by studies of historical spread
            relationships and break-even spread analysis.  Cash equivalents may
            be used to create the desired yield curve structure.  Portfolio
            positions are continually monitored and evaluated.      

            Sector Emphasis and Security Selection

            Sector and security selection decisions are based on Lincoln
            Capital's judgment and are supported by studies of historical spread
            relationships, break-even yield spread analysis, and model driven
            portfolio return projections.  In order to monitor yield spreads,
            Lincoln Capital maintains extensive yield spread data banks and has
            direct computer access to extensive historical yield spread data and
            specific issuer data.

            Credit research consists of internally generated fundamental
            analysis, and input from rating agencies and other sources.  A
            committee of Lincoln Capital reviews those corporate bonds that are
            considered for purchase.  By focusing on higher-rated securities,

                                       6
<PAGE>
 
            and by comparing judgments among outside sources to internal credit
            judgments, Lincoln Capital believes that credit risk can be managed
            and reduced.


            It is unlikely that Lincoln Capital will seek to enhance the Fund's
            return by anticipating an improvement in the creditworthiness of
            specific corporate issuers, particularly lower rated issuers.

RESEARCH PROCESS

            Virtually 100% of Lincoln Capital's fixed-income research is
            generated in-house.  Each member of the investment staff serves as a
            portfolio manager and a research analyst.  There is no lapse between
            the development of an investment idea and its execution.
            Fundamental research includes economic analysis, sector and issuer
            spread relationships, and credit research.  In the area of
            quantitative research, Lincoln Capital owns proprietary models,
            developed in-house.  These include:  a mortgage prepayment model,
            mortgage valuation model, total return analytics for securities with
            complex cash flows, risk exposure models, and yield curve analytics.

INVESTMENTS

            IN GENERAL.  The Fund may invest in fixed-income securities which
            are obligations of, or guaranteed by the U.S. Government, its
            agencies or instrumentalities ("U.S. Government Securities"). U.S.
            Government Securities are unrated but are generally considered high-
            grade securities.  The Fund may also invest in other investment
            grade, fixed-income securities, including corporate bonds, mortgage-
            backed and other asset-backed securities and other high quality,
            liquid investments.
    
            The debt securities in which the Fund will invest are investment
            grade securities.  These are securities rated in the four highest
            grades assigned by Moody's Investors Service, Inc. ("Moody's") or
            Standard and Poor's Corporation ("S & P") or that are not rated by
            Moody's or S & P but deemed to be of comparable quality by Lincoln
            Capital.  Generally, at least 80% of the Funds total assets will be
            invested in A-Grade Securities, which are in the three highest
            grades, or the equivalent, while 20% of the total assets are not so
            limited.  The lowest investment grade securities have speculative
            characteristics because changes in economic conditions or other
            circumstances are more likely to lead to a weakened capacity to make
            principal and interest payments.  The Fund will not invest in
            securities below investment grade (so called "junk bonds").  In the
            event of a downgrade of a debt security held by the Fund to below
            investment grade, the Fund is not usually required to automatically
            sell the issue, but Lincoln Capital will consider whether to
            continue holding the security.  However, if such a downgrade would
            cause more than 5% of net assets to be invested in debt securities
            below investment grade, Lincoln Capital will take steps as soon as
            practicable to reduce the proportion of debt below investment grade
            to 5% of net assets or less.       

            The value of the shares issued by the Fund is not guaranteed and
            will fluctuate with changes in the value of the Fund's portfolio.
            Generally when prevailing interest rates rise, the value of the
            Fund's portfolio is likely to decline and when prevailing interest
            rates decline, the value of the Fund's portfolio is likely to rise.

            U.S. GOVERNMENT SECURITIES.  There are two basic types of U.S.
            Government Securities: (1) direct obligations of the U.S. Treasury,
            and (2) obligations issued or guaranteed by an

                                       7
<PAGE>
 
            agency or instrumentality of the U.S. Government. Agencies and
            instrumentalities of the U.S. Government include Federal Farm Credit
            System ("FFCS"), Student Loan Marketing Association ("SLMA"),
            Federal Home Loan Mortgage Corporation ("FHLMC"), Federal Home Loan
            Banks ("FHLB"), Federal National Mortgage Association ("FNMA") and
            Government National Mortgage Association ("GNMA"). Some obligations
            issued or guaranteed by agencies or instrumentalities, such as those
            issued by GNMA, are fully guaranteed by the U.S. Government. Others,
            such as FNMA bonds, rely on the assets and credit of the
            instrumentality with limited rights to borrow from the U.S.
            Treasury. Still other securities, such as obligations of the FHLB,
            are supported by more extensive rights to borrow from the U.S.
            Treasury.

            The guarantees of the U.S. Government, its agencies and
            instrumentalities are guarantees of the timely payment of principal
            and interest on the obligations purchased and not of their market
            value.

            MORTGAGE RELATED SECURITIES

            Pass-Through Securities.  The Fund may invest in GNMA Certificates
            which are mortgage-backed securities representing part ownership of
            a pool of mortgage loans.  A "pool" or group of such mortgages is
            assembled and, after being approved by GNMA, is offered to investors
            through securities dealers.  Once approved by GNMA, the timely
            payment of interest and principal on each mortgage is guaranteed by
            GNMA and backed by the full faith and credit of the U.S. Government.
            GNMA Certificates differ from bonds in that principal is paid back
            monthly by the borrower over the term of the loan rather than
            returned in a lump sum at maturity.  GNMA Certificates are called
            "pass-through" securities because both interest and principal
            payments (including prepayments) are passed through to the holder of
            the Certificate.

            The Fund may also invest in pools of mortgages which are issued or
            guaranteed by other agencies of the U.S. Government such as FNMA or
            FHLMC.  FNMA and FHLMC Certificates are similar to GNMA Certificates
            except that timely payment of interest and principal of each
            mortgage may not be guaranteed by the full faith and credit of the
            U.S. Government.

            The average life of pass-through pools varies with the maturities of
            the underlying mortgage instruments.  In addition, a pool's term may
            be shortened by unscheduled or early payment of principal and
            interest on the underlying mortgages.  The occurrence of mortgage
            prepayments is affected by the level of interest rates, general
            economic conditions, the location and age of the mortgage and other
            social and demographic conditions.  As prepayment of individual
            pools varies widely, it is not possible to precisely predict the
            average life of a particular pool.

            Collateralized Mortgage Obligations.  The Fund may also invest in
            collateralized mortgage obligations ("CMO"s).  CMOs are debt
            securities issued by a corporation, trust or custodian or by a U.S.
            Government agency or instrumentality, which are collateralized by
            mortgage pass-through securities.  Cash flows from the mortgage
            pass-through securities are allocated to various tranches (a
            "tranche" is essentially a separate security) in a predetermined,
            specified order.  Each tranche has a stated maturity (the latest
            date by which the tranche can be completely repaid, assuming no
            prepayments) and has an average life (the average of the time to
            receipt of a principal payment weighted by the size of the principal
            payment).  The average life is typically used as a proxy for
            maturity because the 

                                       8
<PAGE>
 
            debt is amortized (repaid a portion at a time), rather than being
            paid off entirely at maturity, as would be the case in a straight
            debt instrument. The Fund will normally invest only in CMOs issued
            by U.S. Government agencies or instrumentalities.

            Interest and principal payments from the underlying mortgages are
            typically used to pay interest on all CMO tranches and to retire
            successive class maturities in a sequence. Thus, the issuance of CMO
            tranches with varying maturities and interest rates may result in
            greater predictability of maturity with one tranche and less
            predictability of maturity with another tranche than a direct
            investment in a mortgage-backed pass-through security (such as a
            GNMA Certificate). Tranches with shorter maturities typically have a
            lower volatility and lower yield while those with longer maturities
            typically have higher volatility and higher yield. Thus, investments
            in CMOs can carry more or less risk than mortgage pass-through
            securities and offer more defensive or aggressive investment
            alternatives.

            Stripped Mortgage-Backed Securities.  Stripped mortgage securities
            are created when the principal and interest payments on a pool of
            mortgages in a CMO are separated or "stripped" to create two classes
            of securities.  In general, the interest-only, or "IO" class of
            stripped securities, receives all interest and no principal
            payments, while the principal-only, or "PO" class, is entitled to
            receive all principal and no interest payments.  The values of
            stripped mortgage securities can be volatile and are sensitive to
            prepayment rates on the mortgages underlying the stripped
            securities.
    
            Mortgage Dollar Rolls.  The Fund may enter into "mortgage dollar
            rolls," which are transactions in which the Fund sells a mortgage-
            related security to a dealer and simultaneously agrees to repurchase
            a similar security (but not the same security) in the future at a
            pre-determined price.  See "Mortgage Dollar Rolls" in the Fund's
            Statement of Additional Information for more information regarding
            this type of transaction.       

            Additional Risks. Investment by the Fund in mortgage-related U.S.
            Government Securities, such as GNMA Certificates, and CMOs also
            involves other risks.  The yield on a pass-through security is
            typically quoted based on the maturity of the underlying instruments
            and the associated average life assumption.  Actual prepayment
            experience may cause the yield to differ from the assumed average
            life yield.  Accelerated prepayments adversely impact yields for
            pass-throughs purchased at a premium; the opposite is true for pass-
            throughs purchased at a discount.  During periods of declining
            interest rates, prepayment of mortgages underlying pass-through
            certificates can be expected to increase.  When the mortgage
            obligations are prepaid, the Fund reinvests the prepaid amounts in
            securities, the yields of which reflect interest rates prevailing at
            that time.  Therefore, the Fund's ability to maintain a portfolio of
            high-yielding, mortgage-backed securities will be adversely affected
            to the extent that prepayments of mortgages must be reinvested in
            securities which have lower yields than the prepaid mortgages.
            Moreover, prepayments of mortgages which underlie securities
            purchased at a premium could result in capital losses.

            OTHER ASSET-BACKED SECURITIES

            The Fund may invest in asset-backed securities which are backed by
            assets other than mortgages.  The securities are collateralized by
            shorter term loans such as automobile loans, computer leases, or
            credit card receivables.  The payments from the collateral are
            passed through to the security holder.  The collateral behind asset-
            backed securities tends to have prepayment rates that do not vary
            with interest rates.  In addition, the short-term nature of the
            loans reduces the impact of any change in prepayment level.  These

                                       9
<PAGE>
 
            securities are generally issued as the debt of a special purpose
            entity organized solely for the purpose of owning such assets and
            issuing such debt. 

            Credit Support.  Asset-backed securities are backed by a diversified
            pool of assets representing the debt of a number of different
            parties.  To lessen the effect of failures by the debtors to make
            payments, such securities may contain elements of credit support.
            Such credit support falls into two classes:  liquidity protection
            and protection against ultimate default by debtors on the underlying
            assets.  Liquidity protection refers to the provision of advances,
            generally by the entity administering the pool of assets, to ensure
            that scheduled payments on the underlying pool are made in a timely
            fashion.  Protection against ultimate default ensures repayment of
            at least a portion of the debt in the pool.  Such protection may be
            provided through guarantees, insurance policies or letters of credit
            obtained from third parties, through various means of structuring
            the transaction or through a combination of such approaches.

            Additional Risks.  Issuers of asset-backed securities generally hold
            no assets other than the assets underlying such securities and any
            credit support provided.  As a result, although payments on such
            asset-backed securities are obligations of the issuers, in the event
            of defaults on underlying assets not covered by any credit support,
            the issuers are unlikely to have sufficient assets to satisfy their
            obligations on the related asset-backed securities.  The loans
            underlying these securities are subject to prepayments which can
            decrease maturities and returns.  Due to the possibility that
            prepayments will alter the cash flow on asset-backed securities, it
            is not possible to determine in advance the actual final maturity
            date or average life.  Faster prepayment will shorten the average
            life and slower prepayments will lengthen it.  However, it is
            possible to determine what the range of that movement could be and
            to calculate the effect that it will have on the price of the
            security.

            The values of these securities are ultimately dependent upon payment
            of the underlying loans by individuals, and the holders, such as the
            Fund, generally have no recourse against the originator of the
            loans.  The Fund as a holder of these securities may experience
            losses or delays in payment if the original payments of principal
            and interest are not made to the issuer with respect to the
            underlying loans.

            CORPORATE BONDS

            The Fund may invest in investment grade corporate bonds.  Usually,
            no single corporate issuer will comprise more than 5% of the Fund's
            total assets at the time of investment.  The value of lower-rated
            corporate debt securities is more sensitive to economic changes or
            individual corporate developments than higher-rated investments. The
            Fund will normally invest in corporate issues that are rated A or
            better by Moody's or S & P or which are not rated by Moody's or S &
            P but are deemed by Lincoln Capital to be of comparable quality.

            Some of the debt securities in which the Fund may invest are known
            as "Yankee Bonds."  Yankee Bonds are U.S. dollar-denominated debt
            securities issued by foreign entities.  These bonds are not subject
            to currency fluctuation risks.  However, the issuing entities are
            sometimes not subject to the same accounting principles as U.S.
            corporations.  The risks of investment in foreign issuers may
            include expropriation or nationalization of assets, confiscatory
            taxation, exchange controls and limitations on the use or transfer
            of assets, and significant withholding taxes.  Lincoln Capital will
            take these factors into 

                                       10
<PAGE>
 
            consideration when determining what Yankee Bonds the Fund will
            purchase. Other than Yankee Bonds, the Fund does not intend to
            invest in securities of foreign issuers.
    
            ADDITIONAL USE OF DERIVATIVES      

            Inverse Floating Rate Obligations.  The Fund may invest in inverse
            floating rate obligations which are commonly referred to as "inverse
            floaters."  Inverse floaters have coupon rates that vary inversely
            at a multiple of a designated floating rate, such as LIBOR (London
            Inter-Bank Offered Rate).  Any rise in the reference rate of an
            inverse floater (due to an increase in prevailing interest rates)
            causes a drop in the coupon rate, while any drop in the reference
            rate of an inverse floater causes an increase in the coupon rate.
            In addition, like most other fixed-income securities, the value of
            inverse floaters will generally decrease as interest rates increase.
            Inverse floaters may exhibit substantially greater price volatility
            than fixed rate obligations having similar credit quality,
            redemption provisions and maturity.  Inverse floater CMOs exhibit
            greater price volatility than the majority of mortgage pass-through
            securities or other CMOs.  In addition, some inverse floater CMOs
            exhibit extreme sensitivity to changes in the rate of prepayments.
            As a result, the yield to maturity of an inverse floater CMO is
            sensitive not only to changes in interest rates but also to changes
            in prepayment rates on the related underlying mortgage assets.  The
            Fund does not intend to invest in an inverse floater if, at the time
            of such investment, more than 5% of the Fund's net assets would be
            invested in inverse floaters.

            Futures Contracts.  The Fund may purchase and sell interest rate
            futures contracts ("futures contracts"), which are described in the
            Appendix to the Statement of Additional Information, for the purpose
            of hedging its portfolio of fixed-income securities against the
            adverse effects of anticipated movements in interest rates or as an
            efficient means of adjusting its exposure to the bond market.
            Futures contracts provide for the sale by one party and purchase by
            another party of a specified amount of a specific security, at a
            specified future time and price.  The terms of a futures contract
            either call for actual delivery of the underlying financial
            instrument, or the making of a cash payment or settlement.  In most
            cases the contracts are closed out before the delivery date without
            delivery taking place.

            The Fund may use futures contracts to adjust portfolio duration and
            manage interest rate risk.  Futures have durations which, in
            general, are closely related to the duration of the securities which
            underlie them.  Buying futures increases the duration of the
            portfolio while selling futures decreases the duration.  The Fund
            may be able to maintain a particular duration for a fraction of the
            cash investment required to purchase the underlying security.
            However, to the extent that the Fund sells futures that are not
            "covered" by securities held in the portfolio or purchases futures,
            the Fund is required to set aside cash or cash equivalents in a
            segregated account equal, on a daily basis, to the Fund's obligation
            on the futures contract.  Such segregated funds will earn income but
            will not otherwise be available for investment.

            The Fund will not engage in a futures transaction if it would cause
            the aggregate of initial margin deposits which do not represent bona
            fide hedging to exceed 5% of the value of total assets.  The
            successful use of futures for hedging purposes depends on Lincoln
            Capital's ability to forecast interest rate movements.  Should
            interest rates move in an unexpected manner, the Fund may not
            achieve the anticipated benefits of the futures contracts and thus
            may be in a worse position than if such strategies had not been
            used. 

                                       11
<PAGE>
 
            See the Statement of Additional Information for a more
            detailed discussion of the risks involved in the use of futures.

DELAYED DELIVERY TRANSACTIONS

            The Fund may purchase or sell securities on a when-issued basis.
            When-issued securities are securities purchased at a certain price
            even though the securities may not be delivered for up to 90 days.
            The Fund will maintain, with its Custodian, a separate account with
            a segregated portfolio of liquid, high-grade debt securities or cash
            in an amount at least equal to these commitments.  The Fund will
            generally earn income on assets deposited in the segregated account.
            No payment or delivery is made by the Fund in a when-issued
            transaction until it receives payment or delivery from the other
            party to the transaction.  Although the Fund receives no income from
            the above described securities prior to delivery, the market value
            of such securities is still subject to change.  As a consequence, it
            is possible that the market price of the securities at the time of
            delivery may be higher or lower than the purchase price.  The Fund
            does not intend to remain fully invested when such purchases are
            outstanding.  However, if the Fund were to remain substantially
            fully invested at a time when delayed delivery purchases are
            outstanding, the delayed delivery purchases could result in a form
            of leveraging.  When the Fund has sold a security on a delayed
            delivery basis, the Fund does not participate in future gains or
            losses with respect to the security.  If the other party to a
            delayed delivery transaction fails to deliver or pay for the
            securities, the Fund could miss a favorable price or yield
            opportunity or could suffer a loss.  The Fund may dispose of or
            renegotiate a delayed delivery transaction after it is entered into,
            and may sell when-issued securities before they are delivered, which
            may result in a capital gain or loss.

ILLIQUID SECURITIES

            The Fund will not purchase or hold illiquid securities if more than
            15% of the Fund's net assets would then be illiquid.  If at any time
            more than 15% of the Fund's net assets are illiquid, sales will be
            made as soon as practicable to reduce the percentage of illiquid
            assets to 15% or less.

RULE 144A SECURITIES

            The Fund may invest in restricted securities, i.e., securities
            which, if sold, would cause the Fund to be deemed an "underwriter"
            under the Securities Act of 1933 (the "1933 Act") or which are
            subject to contractual restrictions on resale.  The restricted
            securities which the Fund may purchase include securities which have
            not been registered under the 1933 Act but are eligible for purchase
            and sale pursuant to Rule 144A ("Rule 144A Securities").  This Rule
            permits certain qualified institutional buyers, such as the Fund, to
            trade in privately placed securities even though such securities are
            not registered under the 1933 Act.  As a matter of non-fundamental
            policy, Lincoln Capital will only purchase Rule 144A Securities that
            Lincoln Capital determines to be liquid.  In making this
            determination, Lincoln Capital will consider the frequency of trades
            and quotes, the number of dealers and potential purchasers, dealer
            undertakings to make a market, and the nature of the security and
            the market place trades (for example, the time needed to dispose of
            the security, the method of soliciting offers and the mechanics of
            transfer).  The liquidity of Rule 144A Securities will also be
            monitored by Lincoln Capital and, if as a result of changed
            conditions, it is determined that a Rule 144A Security is no longer
            liquid, the Fund's holding of illiquid securities will be reviewed
            to determine what, if any, action is appropriate in light of the
            policy limiting investments in such securities to 15% of the Fund's
            total assets.  There is no limitation on the percentage of the
            Fund's assets that 

                                       12
<PAGE>
 
            can be invested in liquid Rule 144A Securities. Investing in Rule
            144A Securities could have the effect of increasing the amount of
            investments in illiquid securities if qualified institutional buyers
            are unwilling to purchase such securities.


REPURCHASE AGREEMENTS

            The Fund may invest in repurchase agreements.  A repurchase
            agreement is an arrangement under which the Fund buys securities and
            the seller (a bank or securities dealer that Lincoln Capital
            believes to be financially sound) simultaneously agrees to
            repurchase the security within a specified time at a higher price
            that includes an amount representing interest on the purchase price.
            In the event of a default by a seller of a repurchase agreement, the
            Fund could experience both delays in liquidating the underlying
            securities and potential losses.  The Fund will normally invest in
            repurchase agreements maturing in less than seven days.  Repurchase
            agreements maturing in more than seven days are deemed to be
            illiquid and thus subject to the Fund's 15% limitation on
            investments in illiquid securities described above.
    
INVESTMENT DIVERSIFICATION AND CONCENTRATION      

            As to seventy-five percent of the Fund's total assets, the Fund will
            not purchase the security of any issuer (other than cash items or
            U.S. Government Securities) if such purchase would cause the Fund's
            holdings of that issuer to amount to more than 5% of the Fund's
            total assets at the time of purchase.  The remaining 25% of the
            Fund's total assets are not so limited which allows Lincoln Capital
            to invest more than 5% of the Fund's total assets in a single
            issuer.  In the event that Lincoln Capital chooses to make such an
            investment, it may expose the Fund to greater risk.  No investment
            in a single corporate issuer will be made if, at that time, such
            issuer would represent more than 5% of the Fund's total assets.  A
            single issuer of asset-backed securities may at times represent up
            to 10% of the Fund's total assets.
    
            The Fund will not concentrate 25% or more of its total assets in any
            one industry.  Securities of the U.S. Government, its agencies and
            instrumentalities are not deemed to be industries for this purpose.
                 
BORROWING
    
            The Fund may not borrow money to purchase securities.  The Fund may
            borrow money only for temporary or emergency purposes, and then only
            from banks in an amount not exceeding 33-1/3% of the value of the
            Fund's total assets (including the amounts borrowed).  The Fund will
            not purchase securities when its borrowings, less amounts receivable
            on sales of portfolio securities, exceed 5% of total assets.      

CERTAIN INVESTMENT RESTRICTIONS

            In addition to other non-fundamental restrictions as described
            herein and in the Statement of Additional Information, the Fund will
            not (i) invest in securities that are rated below investment grade
            or are deemed by Lincoln Capital to be the equivalent, if unrated;
            (ii) enter into reverse repurchase agreements;  (iii) engage in
            options transactions; (iv) purchase foreign securities other than
            Yankee Bonds or (v) use leverage except to the extent that certain
            strategies, such as delayed-delivery or futures transactions, may be
            considered leveraged transactions by the Securities and Exchange
            Commission.

                                       13
<PAGE>
 
PORTFOLIO TRANSACTIONS

            Lincoln Capital is responsible for the placement of portfolio
            transactions.  It is the Fund's policy to seek to place portfolio
            transactions with brokers or dealers on the basis of best execution.
    
            Generally, Lincoln Capital manages the Fund without regard to
            restrictions on portfolio turnover, except those imposed on its
            ability to engage in short-term trading by provisions of the federal
            tax laws. The use of futures contracts and other derivative
            instruments with relatively short maturities may tend to exaggerate
            the portfolio turnover rate for the Fund. Trading in fixed-income
            securities does not generally involve the payment of brokerage
            commissions, but does involve indirect transaction costs. The use of
            futures contracts may involve the payment of commissions to futures
            commission merchants. The higher the rate of portfolio turnover of
            the Fund, the higher all these transaction costs borne by the Fund
            generally will be. The Fund's annual turnover rate may exceed 100%
            due to changes in portfolio duration, yield curve strategy, or
            sector decisions; however, it is expected that the annual turnover
            rate will not exceed 300%. A portfolio turnover rate of 300% would
            mean that the securities in the Fund's portfolio were replaced three
            times in a year. An annual turnover rate which exceeds 100% is
            considered to be high.     

FUNDAMENTAL POLICIES MAY NOT BE CHANGED WITHOUT SHAREHOLDER APPROVAL.

            The Fund's investment objective and the investment restrictions set
            forth as fundamental in the Statement of Additional Information,
            including those in respect to investment concentration and the 33-
            1/3% limitation on borrowing as discussed above, are fundamental
            policies and may not be changed without a shareholder vote.  All
            other investment policies of the Fund are not fundamental and may be
            changed by the Board of Trustees.  Any percentage restrictions
            (except those with respect to borrowing and illiquid securities)
            apply at the time of investment without regard to later increases or
            decreases in the values of securities or total or net assets.

            MANAGEMENT AND ORGANIZATION OF THE FUND

            The Fund is a series of Ariel Growth Fund (doing business as Ariel
            Investment Trust) (the "Trust"),  an open-end diversified management
            investment company organized as a Massachusetts business trust on
            August 1, 1986.  The other series currently offered, which are sold
            under a separate prospectus, are Ariel Growth Fund and Ariel
            Appreciation Fund.
    
            Shares of the Fund are currently issued in one class, the
            Institutional Class.  Upon receipt of the necessary regulatory
            approvals, the Fund expects to offer a second class of shares, the
            Investor Class, under a separate prospectus.  The Board of Trustees
            may offer additional classes in the future and may at any time
            discontinue the offering of any class of shares.  Shares have no
            preemptive or subscription rights and are freely transferable.  Each
            share of the Fund represents an interest in the assets of the Fund
            and has identical voting, dividend, liquidation and other rights and
            the same terms and conditions as any other shares except that (i)
            the expenses that are specific to a class, such as distribution
            expenses and administrative fees, are borne solely by such class and
            (ii) each class of shares votes separately with respect to matters
            in which the interests of one class differ from the interests of the
            other class or any other matters for which separate class voting is
            appropriate under applicable law.      

                                       14
<PAGE>
 
            Because the Investor Class incurs higher administrative and
            distribution fees, that class will have correspondingly lower
            returns than the Institutional Class.  You may call 1-800-29-ARIEL
            (1-800-292-7435) for more information regarding the Investor Class
            of the Fund.       
    
            The Trust does not hold annual shareholder meetings.  Shareholder
            meetings are held when they are required under the Investment
            Company Act of 1940 or otherwise called for special purposes.
            Special meetings may be called upon the request of shareholders
            holding at least 10% of the Fund's outstanding shares. Trustees may
            be removed at a special meeting of shareholders by a vote of two-
            thirds of the outstanding shares. As a shareholder, you receive one
            vote for each share of the Fund you own.      

THE BOARD OF TRUSTEES SUPERVISES THE FUND'S ACTIVITIES AND REVIEWS THE TRUST'S
CONTRACTS WITH COMPANIES THAT PROVIDE SERVICES TO THE FUND.

            BOARD OF TRUSTEES

            MARIO L. BAEZA, ESQ.
            President, Wasserstein Perella International Limited; Managing
            Director and Chief Executive Officer, Americas Division, Wasserstein
            Perella & Co., Inc.

            WILLIAM C. DIETRICH, CPA
            Chief Financial Officer, Home Shopping Alternatives, Inc.

            ROYCE N. FLIPPIN, JR., MBA
            President, Flippin Associates; formerly Director of Program
            Advancement, Massachusetts Institute of Technology

            JOHN G. GUFFEY, JR.
            Chair, Calvert Social Investment Foundation; Treasurer and Director,
            Silby, Guffey and Co., Inc.

            MELLODY L. HOBSON
            Senior Vice President, Director of Marketing, Ariel Capital
            Management, Inc.

            CHRISTOPHER G. KENNEDY, MBA
            Executive Vice President and Director, Merchandise Mart Properties,
            Inc.

            ERIC T. McKISSACK, CFA, MBA
            Vice Chairman and Co-Chief Investment Officer, Ariel Capital
            Management, Inc.

            BERT N. MITCHELL, MBA, CPA
            Founder, Chairman and Chief Executive Officer, Mitchell/Titus & Co.

ARIEL CAPITAL MANAGEMENT, INC. SERVES AS THE ADVISER TO THE FUND.
    
            Subject to the overall supervision of the Board of Trustees and
            pursuant to the Investment Advisory Agreement, Ariel Capital
            Management, Inc. (the "Adviser") acts as the investment adviser for
            the Fund.  Under the Investment Advisory Agreement, the Adviser
            performs or supervises the investment and reinvestment of the assets
            of the Fund, is responsible for      

                                       15
<PAGE>
 
            certain management services and pays all of the Fund's expenses
            other than the Adviser's fees under the Investment Advisory
            Agreement and the Administrative Services Agreement, the expenses
            assumed by the Adviser under the Administrative Services Agreement,
            interest, taxes, brokerage commissions and extraordinary expenses.
            Under the Investment Advisory Agreement, the Adviser is paid a fee
            based on the average daily net assets of the Fund at the annual
            rates of 0.43% if such net assets are less than $500 million; 0.41%
            if such net assets are at least $500 million, but less than $1
            billion; 0.39% if such net assets are at least $1 billion, but less
            than $1.5 billion; 0.37% if such net assets are at least $1.5
            billion, but less than $2 billion; and 0.35% if such net assets are
            $2 billion or more. The Adviser also acts as Administrator to the
            Fund (see below) and as investment adviser and administrator to
            Ariel Growth Fund and Ariel Appreciation Fund, the other two series
            of the Trust.      

            The Adviser is a privately held investment management firm,
            controlled by John W. Rogers, Jr. and owned by its employees. The
            Adviser is located at 307 N. Michigan Avenue, Suite 500, Chicago,
            Illinois 60601.

ARIEL DISTRIBUTORS, INC. IS THE PRINCIPAL UNDERWRITER TO THE FUND

            Ariel Distributors, Inc. serves as the principal underwriter.  Under
            the terms of its Underwriting Agreement, Ariel Distributors markets
            and distributes the shares of the Trust and is responsible for
            payment of commissions and service fees to broker-dealers, banks,
            and financial services firms, preparation of advertising and sales
            literature, and printing and mailing of prospectuses to prospective
            investors.

SUB-ADVISER

            Lincoln Capital Management Company ("Lincoln Capital"), 200 South
            Wacker Drive, Chicago, IL  60606, acts as the Sub-Adviser of the
            Fund.  Lincoln Capital manages the day-to-day investment operations
            for the Fund.  The Fund pays no fees directly to Lincoln Capital.
            Lincoln Capital receives fees from the Adviser at the annual rate of
            0.30% of the average daily net assets up to $50 million; 0.20% for
            the next $50 million; 0.15% for the next $150 million and 0.10% for
            amounts greater than $250 million.

            The Managing Directors and controlling shareholders of Lincoln
            Capital and their titles, are as follows:

               John W. Croghan, Chairman
               J. Parker Hall, III, President
               Kenneth R. Meyer, Executive Vice President
               Timothy H. Ubben, Executive Vice President
               Ray B. Zemon, Executive Vice President

PORTFOLIO MANAGEMENT

            The Fund's duration decisions are made by a strategy committee
            comprising five senior officers of Lincoln Capital: W. Croghan, J.
            Parker Hall III, Richard W. Knee, Kenneth R. Meyer, and Ray B.
            Zemon.   The five members of the strategy committee have been with
            Lincoln Capital for over 10 years and average 26 years of investment
            experience.  Investment selections for the Fund are made by members
            of the fixed income group: Terrence J. Glomski, Lorraine L. Holland,
            Andrew A. Johnson, Brian D. Johnson, 

                                       16
<PAGE>
 
            Richard W. Knee, Kenneth R. Meyer, Thomas K. Parrent, and Ray B.
            Zemon. The eight members of the fixed income group average 16 years
            of investment experience.

PERFORMANCE HISTORY OF LINCOLN CAPITAL
                
            Although Lincoln Capital has no operational history with the newly
            organized Fund, set forth below are certain performance data,
            provided by Lincoln Capital, relating to annual average investment
            results of a composite of client advisory accounts ("Advisory
            Accounts") whose portfolios were managed by Lincoln Capital over a
            period of thirteen years, since Lincoln Capital began operations.
            The Advisory Accounts had the same investment objective as the Fund
            and were managed using substantially similar, though not necessarily
            identical investment strategies and techniques as those contemplated
            by the Fund.  Because of the similarities in investment strategies
            and techniques, Lincoln Capital believes that the Advisory Accounts
            are sufficiently comparable to the Fund to make the performance data
            listed below relevant to investors in the Fund.  Also set forth
            below, for comparison, are the performances of widely recognized
            indices of market activity based upon the aggregate performance of
            selected unmanaged portfolios of publicly traded fixed-income
            securities.       
                
            The results presented are not intended to predict or suggest returns
            that will be experienced by the Fund or the return that an investor
            will achieve by investing in the Fund.  The Fund is subject to
            different costs, including investment, administration and
            registration fees that were not incurred by the Advisory Accounts.
            Different methods of determining the performance from those
            described in the footnote to the chart below may result in different
            performance figures. Investors should not rely on the following data
            as an indication of future performance of Lincoln Capital or of the
            Fund.        

                                       17
<PAGE>
 
    
                              ANNUAL TOTAL RETURN       
                              -------------------

<TABLE>     
<CAPTION>
                                              Lincoln Capital's                          Salomon Brothers
                Number of   Average Account      Active Fixed       Lehman Brothers     Broad Investment-
 Time Period   of Accounts  Size ($millions)    Composite (1)     Aggregate Index (2)  Grade Bond Index (2)
- -------------  -----------  ----------------  ------------------  -------------------  --------------------
<S>            <C>          <C>               <C>                 <C>                  <C>
    1982                13             $ 45               37.20%               32.62%                31.79%
    1983                17               49                7.62                 8.36                  8.21
    1984                20               61               14.33                15.15                 14.99
    1985                16               92               24.92                22.10                 22.26
    1986                20              102               17.49                15.26                 15.43
    1987                20              111                3.24                 2.76                  2.60
    1988                24              109                7.41                 7.89                  7.99
    1989                27               99               14.71                14.53                 14.43
    1990                29              123                8.47                 8.96                  9.09
    1991                29              168               15.81                16.00                 15.98
    1992                33              165                7.83                 7.40                  7.58
    1993                33              163               11.22                 9.75                  9.92
    1994                31              143               -2.13                -2.92                 -2.85
</TABLE>      
    
(1)  These figures are dollar-weighted, average annual investment results
     expressed as a percentage return.  Returns shown for Lincoln Capital are
     after deduction of investment advisory fees.  The accounts represented in
     the composite are all accounts managed in a manner that is substantially
     similar to the investment management of the Fund and are most of Lincoln
     Capital's active accounts.       

(2)  The Lehman Brothers Aggregate Index and the Salomon Brothers Broad
     Investment-Grade Bond Index are unmanaged indices of fixed-income
     securities which are composed of securities that are substantially similar
     to the types of securities in which the Advisory Accounts and the Fund
     invest.
    
ARIEL CAPITAL MANAGEMENT, INC. SERVES AS THE ADMINISTRATOR TO THE FUND.

          The Adviser is also the Fund's Administrator.  Under the
          Administrative Services Agreement, the Adviser is responsible for
          providing, arranging for or facilitating transfer agency and
          shareholder servicing; the preparation, printing and distribution of
          notices, proxy materials, reports to regulatory bodies and reports to
          shareholders related to a specific class; state securities
          qualifications; SEC registrations and shareholder meetings.  The
          Administrator pays all of the Fund's expenses related to the services
          to be provided under the Administrative Services Agreement, all fees
          and expenses of Trustees incurred as a result of a matter related
          solely to one class of shares of the Fund and, generally, the Fund's
          auditing and legal fees for professional services related solely to
          one class of the shares of the Fund.  The Administrator is not
          responsible for paying any legal, accounting or other expenses related
          to any litigation affecting the Fund.  For services under the
          Administrative Services Agreement, the Institutional Class pays a fee
          based on the average daily net assets of the Institutional Class at
          the annual rates of 0.15% if such net assets are less than $500
          million; 0.125% if such net assets are $500 million or more but less
          than $1 billion; and 0.10% if such net assets are $1 billion or more.
     
THE TRANSFER AGENT AND CUSTODIAN.

            Investors Fiduciary Trust Company ("IFTC") is the Fund's transfer
            agent, custodian and dividend disbursing and shareholder servicing
            agent.

                                       18
<PAGE>
 
            HOW TO BUY SHARES

INITIAL PURCHASES
    
            The minimum initial investment in the Institutional Class is
            $1,000,000.  However, the Adviser may waive the minimum initial
            investment under circumstances in which the Adviser believes an
            investor will meet such minimum within a reasonable time.  A
            completed and signed application is required for each new account
            you open, regardless of the method you choose for making your
            initial investment. An account application accompanies this
            prospectus. Additional forms may be required from corporations,
            associations and certain financial institutions. If you have any
            questions or need additional applications, call 1-800-29-ARIEL (1-
            800-292-7435).        

BY MAIL
            To purchase shares by mail, please make your check payable to ARIEL
            MUTUAL FUNDS and mail it with an application, indicating which of
            the Ariel Mutual Funds you would like to buy, to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

BY WIRE
            You may also purchase shares by bank wire. Just call us at 1-800-29-
            ARIEL (1-800-292-7435) and we will ask you your name, address,
            social security or tax identification number, the amount of your
            investment, the name of the Ariel Mutual Fund in which you wish to
            invest as well as the name and address of the financial institution
            that will be wiring your investment to the Fund.  We will
            immediately give you an account number and you may then have your
            financial institution wire federal funds to the Custodian with the
            following instructions:

               Ariel Mutual Funds
               c/o Investors Fiduciary Trust Company
               127 West 10th Street
               Kansas City, MO 64105
               ABA #101003621
               Account No. 7528205

               The name of the Ariel Mutual Fund(s) and the class in
               which you wish to invest
               Your shareholder account number
               The name in which your account is registered

            We accept wires at no charge. However, your bank may charge you for
            this service.

SUBSEQUENT PURCHASES

            You may make subsequent investments in any amount.  To invest
            directly by bank wire, follow the instructions as shown above for
            initial investments, except that there is no need to call us first.
            Just contact your financial institution.

                                       19
<PAGE>
 
            To add to your account by mail, please send your check or money
            order payable to Ariel Mutual Funds with the detachable stub from
            the bottom of your most recent account statement, or drop us a note
            that includes the registered account name, account number, the name
            of the Fund and amount you wish to invest. Please remember that
            subsequent purchases should be sent to:

               Ariel Mutual Funds
               P.O. Box 419641
               Kansas City, Missouri 64141-6641


AUTOMATIC INVESTING THROUGH YOUR BANK
    
            You may arrange for automatic investing whereby the Custodian will
            be authorized to initiate a debit to your bank account of a specific
            amount to be used to purchase shares of the Fund on a monthly or
            quarterly basis. After each automatic investment, you will receive a
            transaction confirmation and the debit should be reflected on your
            next bank statement. You may terminate the plan at any time, and we
            may modify or terminate the plan at any time. If, however, you
            terminate an automatic investment plan with an account balance of
            less than $1,000,000,  we reserve the right to close your account.
            See "Redeeming Shares-Other Information About Redemptions." If you
            desire to utilize this automatic investment option, please indicate
            your intention to do so on the application included with this
            prospectus.     

            OTHER INFORMATION ABOUT PURCHASING SHARES

            Although there is no sales charge imposed by the Fund when you
            purchase shares, certain dealers or financial institutions which
            sell shares of Ariel Mutual Funds may impose charges for their
            services, and such charges may constitute a significant portion of a
            smaller account.

            The Fund does not issue share certificates unless you specifically
            request one each time you make a purchase. Certificates are not
            issued for fractional shares or to shareholders who have elected a
            systematic withdrawal plan. Also, shares represented by certificates
            may not be redeemed by telephone. See "Redeeming Shares" for
            information on how to redeem your shares.

            IN-KIND PURCHASES

            Under certain circumstances, shares of the Fund may be purchased
            using securities, so long as the securities delivered to the Fund
            meet the investment objective and policies of the Fund, and are
            otherwise acceptable to Lincoln Capital, which reserves the right to
            reject all or any part of the securities offered in exchange for
            shares of the Fund.  See the Statement of Additional Information for
            more details and for the conditions which apply to in-kind
            purchases.

            NET ASSET VALUE

            Net asset value per share ("NAV") refers to the worth of one share.
            NAV is computed by adding the value of all portfolio holdings, plus
            other assets, deducting liabilities and then dividing the result by
            the number of shares outstanding.  The Fund's NAV will vary daily
            based on the market values of its investments.

                                       20
<PAGE>
 
            Fixed-income securities, including those to be purchased under firm
            commitment agreements (other than obligations having a maturity of
            60 days or less), are normally valued on the basis of quotes
            obtained from brokers and dealers or pricing services.  Short-term
            investments having a maturity of 60 days or less are valued at
            amortized cost, unless the Board of Trustees determines that such
            method is not appropriate under specific circumstances.  Assets for
            which there are no quotations available will be valued at fair value
            as determined by the Board of Trustees.

            The NAV is calculated at the close of the regular session of the New
            York Stock Exchange (normally 3:00 p.m. Central time).  The Fund is
            closed for business any day the New York Stock Exchange is closed
            and on the following holidays: Columbus Day, Martin Luther King's
            Birthday and Veterans' Day.  All purchases of Fund shares will be
            confirmed and credited to your account in full and fractional
            shares.

            WHEN YOUR ACCOUNT WILL BE CREDITED

BEFORE YOU BUY SHARES, PLEASE READ THE FOLLOWING INFORMATION TO MAKE SURE YOUR
INVESTMENT IS ACCEPTED AND CREDITED PROPERLY.
    
            Your purchase will be processed at the next offering price based on
            the net asset value next calculated after your order is received and
            accepted.  Such calculation is made at the close of regular session
            trading on the New York Stock Exchange, which is usually 3:00 p.m.
            Central time.  Except as provided above, all your purchases must be
            made in U.S. dollars and checks must be drawn on U.S. banks.  No
            cash will be accepted.  The Fund reserves the right to suspend the
            offering of shares for a period of time or to reject any specific
            purchase order.  If your check does not clear, your purchase will be
            cancelled and you will be charged a $10 fee plus costs incurred by
            the Fund.  When you purchase by check, the Fund can hold payment on
            redemptions until they are reasonably satisfied that the investment
            is collected (normally up to 15 calendar days from the purchase
            date).  To avoid this collection period, you can wire federal funds
            from your bank, which may charge you a fee.      

            Certain financial institutions or broker-dealers which have entered
            into a sales agreement with the Distributor may enter confirmed
            purchase orders on behalf of customers by phone, with payment to
            follow within a number of days of the order as specified by the
            program. If payment is not received in the time specified, the
            financial institution could be liable for resulting fees or losses.
            State securities laws may require such firms to be licensed as
            securities dealers in order to sell shares of the Fund.


            EXCHANGING SHARES

YOU MAY EXCHANGE SHARES OF THE FUND FOR SHARES OF THE OTHER ARIEL MUTUAL FUNDS
AND FOR SHARES OF CERTAIN MONEY MARKET FUNDS.

            You may exchange your shares in the Fund for shares of the Fund's
            Investor Class (when available for purchase) or for shares of the
            other Ariel Mutual Funds at no additional charge as long as your
            total investment in each class or Fund meets the minimum investment
            required for that class or Fund.      

            You may also exchange your shares in any Ariel Mutual Fund for
            shares of Cash Resource Money Market Fund, Cash Resource U.S.
            Government Money Market Fund or 

                                       21
<PAGE>
 
            Cash Resource Tax-Exempt Money Market Fund at no additional charge
            as long as your total investment meets any required minimum. This
            exchange privilege is a convenient way to buy shares in a money
            market fund in order to respond to changes in your goals or in
            market conditions. These money market funds are no-load funds
            managed by Cambridge Investment Advisors, Inc.
    
            Before exchanging your shares into shares of the Fund's Investor
            Class, shares of any other Ariel Mutual Fund or shares of Cash
            Resource Money Market Fund, Cash Resource U.S. Government Money
            Market Fund or Cash Resource Tax-Exempt Money Market Fund, read the
            applicable prospectus. To obtain a prospectus for any of these
            funds, just call 1-800-29-ARIEL (1-800-292-7435).      

BY MAIL
            To exchange your shares of the Fund into shares of one of the other
            Ariel Mutual Funds, just send a written request to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

            This request should include your name, account number, the name of
            the Fund you currently own, the name of the Ariel Mutual Fund you
            wish to exchange into and the dollar amount or number of shares you
            wish to exchange. Please remember that you cannot place any
            conditions on your request.

            To exchange your shares of the Fund into shares of Cash Resource
            Money Market Fund, Cash Resource U.S. Government Money Market Fund
            or Cash Resource Tax-Exempt Money Market Fund, complete and sign an
            application and mail it to the address set forth above.

BY TELEPHONE
    
            Unless you have elected not to have telephone transaction privileges
            by checking the appropriate box in your application, you may also
            make exchanges by calling 1-800-29-ARIEL (1-800-292-7435). Exchanges
            made over the phone may be made by any person, not just the
            shareholder of record. You may only exchange shares by telephone if
            the shares you are exchanging are not in certificate form. Certain
            other limitations and conditions apply to all telephone
            transactions.  Before using your telephone privilege, please read
            "Telephone Transactions."     

            OTHER INFORMATION ABOUT EXCHANGING SHARES

            All accounts opened as a result of using the exchange privilege must
            be registered in the same name and taxpayer identification number as
            your existing account with the Ariel Mutual Funds.

            Because of the time needed to transfer money between funds, you may
            not exchange into and out of the same fund on the same or successive
            days; there must be at least one day between exchanges. You may
            exchange your shares of the Fund only for shares that have been
            registered for sale in your state.

                                       22
<PAGE>
 
            Remember that each exchange represents the sale of shares of one
            fund and the purchase of shares of another. Therefore, you could
            realize a taxable gain or loss on the transaction.

            The Fund reserves the right to terminate or modify the exchange
            privilege with at least 60 days' written notice. If your account is
            subject to backup withholding, you may not use the exchange
            privilege.

            Because excessive trading can hurt the Fund's performance and
            shareholders, the Fund also reserves the right to temporarily or
            permanently terminate, with or without advance notice, the exchange
            privilege of any investor who makes excessive use of the exchange
            privilege (e.g. more than five exchanges per calendar year). Your
            exchanges may be restricted or refused if the Fund receives or
            anticipates simultaneous orders affecting significant portions of
            the Fund's assets. In particular, a pattern of exchanges with a
            "market timer" strategy may be disruptive to the Fund.
    
            If you have any share certificates, you must include them with your
            exchange request.  For certificate delivery instructions see
            "Redeeming Shares--By Mail."     


            TELEPHONE TRANSACTIONS

            If you have telephone transaction privileges, you may purchase,
            redeem, or exchange shares or wire funds by telephone as described
            in this prospectus.  You automatically have telephone privileges
            unless you elect otherwise. These privileges, however, may not be
            available through certain dealers and financial institutions. The
            Fund, the Transfer Agent and their affiliates are not liable for
            acting in good faith on telephone instructions relating to your
            account, provided they follow reasonable procedures to determine
            that the telephone instructions are genuine. Such procedures will
            include a request for a personal identification number and tape
            recording of the instructions. You should verify the accuracy of
            telephone transactions immediately upon receipt of your confirmation
            statement.

            During unusual market conditions, we may have difficulty in
            accepting telephone requests, in which case you should mail your
            request.

            The Fund reserves the right to terminate, suspend or modify
            telephone transaction privileges.


            SPECIAL SERVICES AND CHARGES

            If you are purchasing shares of the Fund through a program of
            services offered by a broker-dealer or financial institution, you
            should read the program materials in conjunction with this
            prospectus.  Certain features may be modified in these programs, and
            administrative charges may be imposed by the broker-dealer or
            financial institution for the services rendered.

            TAX-SAVING RETIREMENT PLANS

CONTACT THE ADVISER FOR COMPLETE INFORMATION KITS DISCUSSING THE PLANS AND THEIR
BENEFITS, PROVISIONS AND FEES.

                                       23
<PAGE>
 
            You may establish your new account under one of several tax-deferred
            plans. These plans let you invest for retirement and shelter your
            investment income from current taxes.

            . Individual Retirement Accounts (IRAs): available to anyone who has
            earned income. You may also be able to make investments in the name
            of your spouse, if your spouse has no earned income.

            . Qualified Profit-Sharing and Money-Purchase Plans (including
            401(k) Plans): available to self-employed people and their partners,
            or to corporations and their employees.

            . Simplified Employee Pension Plan (SEP-IRA): available to self-
            employed people and their partners, or to corporations. Salary
            reduction pension plans (SAR-SEP IRAs) are also available to
            employers with 25 or fewer employees.

            . 403(b)(7) Custodial Accounts: available to employees of most non-
            profit organizations and public schools and universities.


            REDEEMING SHARES

BY MAIL
            You may redeem shares from your account by sending a letter of
            instruction, your name, the name of the Fund and account number from
            which shares are redeemed, the number of shares or dollar amount and
            where you want your check to be sent. Simply send your written
            request to redeem your shares to our Transfer Agent as follows:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

            Certain shareholders, such as corporations, trusts and estates, may
            be required to submit additional documents. The letter of
            instruction must be signed by all required authorized signers.
            Please remember that you cannot place any conditions on your
            request. If any share certificates were issued, they must be
            returned duly endorsed or accompanied by a separate stock
            assignment.   Under certain circumstances, signature guarantees may
            be required.  Please call 1-800-29-ARIEL (1-800-292-7435) for more
            information.

BY TELEPHONE

            Unless you have elected not to have telephone transaction privileges
            by checking the box in your application, you may also redeem shares
            by calling 1-800-29-ARIEL (1-800-292-7435) and receive a check by
            mail. The check can only be issued for up to $25,000, and only to
            the registered owner (who must be an individual), and may only be
            sent to the address of record, which must have been on file for at
            least 60 days. Shares represented by certificates may not be
            redeemed by telephone.

BY WIRE
- --------
            Payment for your shares may also be made to you by wire if you have
            selected this option in your application and have named a commercial
            bank or savings institution with a routing number to which we can
            send your money.

            Once you have applied for wire redemption privileges, you or any
            other person can make such a request by calling 1-800-29-ARIEL (1-
            800-292-7435). You may also use your wire 

                                       24
<PAGE>
 
            privilege by mailing a signed request that includes the name of the
            Fund, account number and amount you wish to have wired, by writing
            to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121
    
            The proceeds will be sent only to the financial institution you have
            designated on your application. You may terminate the wire
            redemption privilege by notifying us in writing. See the
            restrictions under "Telephone Transactions" as they also apply to
            wire redemptions.     


            OTHER INFORMATION ABOUT REDEMPTIONS

TO ENSURE ACCEPTANCE OF YOUR REDEMPTION REQUEST, PLEASE FOLLOW THE PROCEDURES
DESCRIBED HERE AND BELOW.

            There is no charge for redeeming your shares. If, however, you
            redeem shares through certain dealers not having selling agreements
            with respect to the Fund your broker may charge a fee when you
            redeem your shares.

            Once your shares are redeemed, the proceeds will normally be sent to
            you on the next business day. However, if making immediate payment
            could adversely affect the Fund, it may take up to seven calendar
            days. When the New York Stock Exchange is closed (or when trading is
            restricted) for any reason other than its customary weekend or
            holiday closing, or under any emergency circumstances as determined
            by the Securities and Exchange Commission, redemptions may be
            suspended or payment dates postponed.

            You may redeem all or a portion of your shares on any business day
            during which the New York Stock Exchange is open for business except
            the following holidays: Columbus Day, Martin Luther King's Birthday
            and Veteran's Day.  Your shares will be redeemed at the net asset
            value next calculated after your redemption request is received by
            the Transfer Agent in proper form. Redemptions made after the New
            York Stock Exchange has closed will be made at the next day's net
            asset value. Remember that, if you redeem shortly after purchasing
            shares, the Fund may hold payment on the redemption of your shares
            until it is reasonably satisfied that payments made by check have
            been collected (normally up to 15 calendar days after investment).


MINIMUM ACCOUNT BALANCE IS $1,000,000.
    
            Please maintain a balance in your Institutional Class account of at
            least $1,000,000.  If, due to shareholder redemptions, the value of
            your account in the Fund falls below $1,000,000,  the account may be
            closed and the proceeds mailed to you at your address of record. You
            will be given 30 days' notice that your account will be closed
            unless you make an additional investment to increase your account
            balance to the $1,000,000 minimum.       

            REDEMPTIONS IN KIND

            If conditions arise that would make it undesirable for the Fund to
            pay for all redemptions in cash, the Fund may authorize payment to
            be made in marketable portfolio securities.  However, the Fund has
            obligated itself under the Investment Company Act of 1940 to 

                                       25
<PAGE>
 
            redeem for cash all shares of the Fund presented for redemption by
            any one shareholder in any 90-day period up to the lesser of
            $250,000 or 1% of the Fund's net assets. Securities delivered in
            payment of redemptions would be valued at the same value assigned to
            them in computing the Fund's net asset value per share. Shareholders
            receiving such securities may incur brokerage costs or be subject to
            dealer mark downs when these securities are sold.

            DIVIDENDS, CAPITAL GAINS AND TAXES

EACH YEAR, THE FUND DISTRIBUTES SUBSTANTIALLY ALL OF ITS NET INVESTMENT INCOME
AND CAPITAL GAINS TO SHAREHOLDERS.

            The Fund intends to qualify as a regulated investment company under
            Subchapter M of the Internal Revenue Code, as amended (the "Code").
            As such, the Fund generally will not pay Federal income tax on the
            income and gains it pays as dividends to its shareholders.  In order
            to avoid a 4% Federal excise tax, the Fund intends to distribute
            each year substantially all of its net income and gains.

            The Fund intends to seek, but has not yet received, a ruling from
            the Internal Revenue Service to the effect that differing
            distributions among the classes of its shares will not affect the
            Fund's tax status as a regulated investment company.  See the
            Statement of Additional Information for additional detail about the
            tax aspects of the dual-class structure.

            Dividends from net investment income are declared and paid
            quarterly. Net investment income consists of the interest income,
            net short-term capital gains, if any, and dividends declared and
            received on investments, less expenses.  Distributions of net short-
            term capital gains (treated as dividends for tax purposes) and net
            long-term capital gains, if any, are normally declared and paid by
            the Fund once a year.

            During its initial operations, the Fund may be a personal holding
            company ("PHC") under the Code due to substantial ownership of the
            Fund's shares by a few shareholders.  In that event, the Fund
            intends to distribute all its PHC income so that there is no PHC tax
            imposed on the Fund.


DIVIDEND AND DISTRIBUTION PAYMENT OPTIONS

            Dividends and any distributions from the Fund are automatically
            reinvested in the Fund at net asset value, unless you elect to have
            the dividends of $10 or more paid in cash. New shares will be
            purchased at net asset value on the reinvestment date, which is
            generally up to three days prior to the payment date. You must
            notify the Fund in writing prior to the record date to change your
            payment options. If you elect to have dividends and/or distributions
            paid in cash, and the U.S. Postal Service cannot deliver the check,
            or if it remains uncashed for six months, it, as well as future
            dividends and distributions, will be reinvested in additional
            shares.

TAXES ON DISTRIBUTIONS

            Distributions are subject to federal income tax, and may also be
            subject to state or local taxes.  Distributions are taxable when
            they are paid, whether they are received in cash, or reinvested.
            However, distributions declared in December and paid in January are
            taxable as if they were paid on December 31.  For federal tax
            purposes, the Fund's income and short-term capital gain

                                       26
<PAGE>
 
            distributions are taxed as dividends; long-term capital gain
            distributions are taxed as long-term capital gains.  Some dividends
            may be exempt from state or local income tax as income derived from
            U.S. Government Securities.  You should consult your tax adviser on
            the taxability of your distributions.

"BUYING A DIVIDEND"

            At the time of purchase, the share price of the Fund may reflect
            undistributed income, capital gains or unrealized appreciation of
            securities. Any income or capital gains from these amounts which are
            later distributed to you are fully taxable. On the record date of a
            distribution, the Fund's share value is reduced by the amount of the
            distribution. If you buy shares just before the record date ("buying
            a dividend") you will pay the full price for the shares and then
            receive a portion of this price back as a taxable distribution.

YOU MAY REALIZE A CAPITAL GAIN OR LOSS WHEN YOU SELL OR EXCHANGE SHARES.

            If you sell or exchange your shares you will have a short or long-
            term capital gain or loss, depending on how long you owned the
            shares which were sold. In January, you will be sent a form
            indicating the proceeds from all sales, including exchanges. You
            should keep your annual year-end account statements to determine the
            cost (basis) of the shares to report on your tax returns.
    
            If the Fund does not have your correct Social Security or Corporate
            Tax Identification Number ("TIN") and a signed certified application
            or Form W-9, Federal law requires the Fund to withhold 31% of your
            dividends and certain redemptions. In addition, you may be subject
            to a fine. You will also be prohibited from opening another account
            by exchange. If this TIN information is not received within 60 days
            after your account is established, your account may be redeemed at
            the current NAV on the date of redemption. The Fund reserves the
            right to reject any new account or any purchase order for failure to
            supply a certified TIN.      

                                  CERTAIN SHAREHOLDERS OF THE FUND      

            The following table sets forth, as of _________, 1995, the name and
            holdings of each person known by the Fund to be a record owner of
            more than 5% of its outstanding shares.  As of such date, there were
            ____ Institutional Class shares, and no Investor Class shares,
            outstanding.       

                                         % OF OUTSTANDING
NAME AND ADDRESS         OWNED      INSTITUTIONAL CLASS SHARES
- ----------------         -----      --------------------------

Ariel Capital Management, Inc.        ____        100%
307 N. Michigan Avenue
Chicago, IL  60601     

            TOTAL RETURN, YIELD AND OTHER PERFORMANCE INFORMATION

THE FUND MAY ADVERTISE TOTAL RETURN AND YIELD, WHICH ARE BASED ON HISTORICAL
RESULTS AND ARE NOT INTENDED TO INDICATE FUTURE PERFORMANCE.

            A total return is a change in the value of an investment during the
            stated period, assuming all dividends and capital gain distributions
            are reinvested. A cumulative total return reflects performance over
            a stated period of time. An average annual total return is the
            hypothetical annual compounded return that would have produced the
            same cumulative 

                                       27
<PAGE>
 
            total return if the performance had been constant over the entire
            period. Because average annual returns tend to smooth out variations
            in the returns, you should recognize that they are not the same as
            actual year-by-year results. In addition to advertising average
            annual returns for the required standard periods, such returns may
            be quoted for other periods, including periods of less than one
            year.

            Quotations of yield for the Fund will be based on the investment
            income per share (as defined by the Securities and Exchange
            Commission) during a particular 30-day (or one-month) period
            (including dividends and interest), less expenses accrued during the
            period ("net investment income"), and will be computed by dividing
            net investment income by the maximum public offering price per share
            on the last day of the period.

            The Fund also may provide current distribution information to its
            shareholders in shareholder reports or other shareholder
            communications or in certain types of sales literature provided to
            prospective investors.  Current distribution information for the
            Fund will be based on distributions for a specified period (i.e.,
                                                                        ---- 
            total dividends from net investment income), divided by the net
            asset value per share on the last day of the period and annualized.
            The rate of current distributions does not reflect deductions for
            unrealized losses from transactions in derivative instruments such
            as futures, which may reduce total return.  Current distribution
            rates differ from standardized yield rates in that they represent
            what the Fund has declared and paid to shareholders as of the end of
            a specified period rather than the Fund's actual net investment
            income for that period.

            Performance information for the Fund may also be compared to various
            unmanaged indices, such as the Lehman Brothers Aggregate Index, the
            Lehman Brothers Government/Corporate Index, the Salomon Brothers
            Broad Investment-Grade Bond Index, indices prepared by Lipper
            Analytical Services, and other entities or organizations which track
            the performance of investment companies or investment advisers.
            Unmanaged indices (i.e., other than Lipper) generally do not reflect
                               ----                                             
            deductions for administrative and management costs and expenses.
            Any performance information should be considered in light of the
            Fund's investment objectives and policies, characteristics and
            quality of the portfolio and the market conditions during the time
            period indicated, and should not be considered to be representative
            of what may be achieved in the future.  For a description of the
            methods used to determine yield and total return for the Fund, see
            the Statement of Additional Information.

            From time to time, the Fund or its affiliates may provide
            information including, but not limited to, general economic
            conditions, comparative performance data and rankings with respect
            to comparable investments for the same period and for unmanaged
            market indices described in the Statement of Additional Information.

                                       28
<PAGE>

ADVISER,
SERVICES ADMINISTRATOR
Ariel Capital Management, Inc.
307 North Michigan Avenue
Chicago, Illinois 60601
1-800-29-ARIEL (1-800-292-7435) fax (312) 726-7473

SUB-ADVISER
Lincoln Capital Management Company
200 South Wacker Drive
Chicago, IL  60606

PRINCIPAL UNDERWRITER
Ariel Distributors, Inc.
307 North Michigan Avenue
Chicago, Illinois  60601

INDEPENDENT AUDITORS
Ernst & Young LLP
233 South Wacker Drive
Chicago, Illinois 60606

TRANSFER AGENT AND CUSTODIAN
Investors Fiduciary Trust Company
127 West 10th Street
Kansas City, Missouri 64105

LEGAL COUNSEL
D'Ancona & Pflaum
30 North LaSalle Street
Chicago, Illinois 60602

BOARD OF TRUSTEES

Mario L. Baeza, Esq.
President, Wasserstein Perella International; Managing Director and Chief
Executive Officer, Americas Division, Wasserstein Perella & Co., Inc.

William C. Dietrich, CPA
Chief Financial Officer, Home Shopping Alternatives, Inc.

Royce N. Flippin, Jr., MBA
President, Flippin Associates; formerly Director of Program Advancement,
Massachusetts Institute of Technology

John G. Guffey, Jr.
Chair, Calvert Social Investment Foundation
Treasurer and Director, Silby, Guffey and Co., Inc.

Mellody L. Hobson
Senior Vice President, Director of Marketing, Ariel Capital Management, Inc.

Christopher G. Kennedy, MBA
Executive Vice President and Director,
Merchandise Mart Properties, Inc.

Eric T. McKissack, CFA, MBA
Vice Chairman and Co-Chief Investment Officer,
Ariel Capital Management, Inc.

Bert N. Mitchell, MBA, CPA
Founder, Chairman and Chief Executive Officer, Mitchell/Titus & Co.

                                       29
<PAGE>
 
ADVISER,
SERVICES ADMINISTRATOR
Ariel Capital Management, Inc.
307 North Michigan Avenue
Chicago, Illinois 60601
1-800-29-ARIEL (1-800-292-7435) fax (312) 726-7473

SUB-ADVISER
Lincoln Capital Management Company
200 South Wacker Drive
Chicago, IL  60606

PRINCIPAL UNDERWRITER
Ariel Distributors, Inc.
307 North Michigan Avenue
Chicago, Illinois  60601

INDEPENDENT AUDITORS
Ernst & Young LLP
233 South Wacker Drive
Chicago, Illinois 60606

TRANSFER AGENT AND CUSTODIAN
Investors Fiduciary Trust Company
127 West 10th Street
Kansas City, Missouri 64105

LEGAL COUNSEL
D'Ancona & Pflaum
30 North LaSalle Street
Chicago, Illinois 60602

BOARD OF TRUSTEES

Mario L. Baeza, Esq.
President, Wasserstein Perella International; Managing Director and Chief
Executive Officer, Americas Division, Wasserstein Perella & Co., Inc.

William C. Dietrich, CPA
Chief Financial Officer, Home Shopping Alternatives, Inc.

Royce N. Flippin, Jr., MBA
President, Flippin Associates; formerly Director of Program Advancement,
Massachusetts Institute of Technology

John G. Guffey, Jr.
Chair, Calvert Social Investment Foundation
Treasurer and Director, Silby, Guffey and Co., Inc.

Mellody L. Hobson
Senior Vice President, Director of Marketing, Ariel Capital Management, Inc.

Christopher G. Kennedy, MBA
Executive Vice President and Director,
Merchandise Mart Properties, Inc.

Eric T. McKissack, CFA, MBA
Vice Chairman and Co-Chief Investment Officer,
Ariel Capital Management, Inc.

Bert N. Mitchell, MBA, CPA
Founder, Chairman and Chief Executive Officer, Mitchell/Titus & Co.

                                       30
<PAGE>
 
                  SUBJECT TO COMPLETION DATED AUGUST 28, 1995      

            PROSPECTUS
            FOR INVESTOR CLASS SHARES      
                                              ______, 1995

            ARIEL MUTUAL FUNDS
               ARIEL PREMIER BOND FUND
            307 NORTH MICHIGAN AVENUE, SUITE 500, CHICAGO, ILLINOIS 60601

    
     The Ariel Premier Bond Fund (the "Fund") is a series of the Ariel Growth
     Fund (doing business as Ariel Investment Trust) (the "Trust").  Ariel
     Capital Management, Inc. (the "Adviser") is the Manager and Administrator
     of the Fund.  Lincoln Capital Management Company ("Lincoln Capital") is the
     Fund's Sub-Adviser responsible for the day to day investment operations.
     
    
     The Fund currently offers two classes of shares, the Institutional Class
     and the Investor Class.  Investor Class shares require an initial minimum
     investment of $1,000 or more.  See "How to Buy Shares - Initial Purchase."
     Institutional Class shares require a minimum initial investment of $1
     million and are sold primarily to institutional investors under a separate
     prospectus.  Because the Investor Class incurs distribution services fees
     and bears higher administrative expenses, the Investor Class will have a
     higher expense ratio than the Institutional Class, which will affect the
     relative performance of the classes.       

INVESTMENT OBJECTIVE
    
     The Fund seeks to maximize total return through a combination of income and
     capital appreciation.  The Fund generally invests in high quality, highly
     liquid fixed-income securities. Normally, at least 80% of the Fund's total
     assets will be invested in fixed-income securities rated A or better by a
     nationally recognized securities rating organization (or deemed the
     equivalent by Lincoln Capital, if unrated).  The Fund seeks to achieve its
     investment objective by implementing decisions regarding the level and
     direction of interest rates (duration and yield curve decisions) and
     through the purchase and sale of securities to take advantage of perceived
     yield spread opportunities.       

ABOUT THIS PROSPECTUS
    
     This prospectus sets forth important information concerning the Ariel
     Premier Bond Fund.  Please read it carefully before investing and keep it
     for future reference.  It is designed to provide you with information you
     should know before investing and to help you decide if the goals of the
     Fund match your own.      

     A Statement of Additional Information (dated ______, 1995) for the Fund has
     been filed with the Securities and Exchange Commission and (together with
     any supplement thereto) is incorporated herein by reference.  This
     Statement is available upon request from the Fund by calling 1-800-29-ARIEL
     (1-800-292-7435).

     SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED  OR
     ENDORSED BY, ANY BANK, AND ARE NOT FEDERALLY  INSURED BY THE FDIC, THE
     FEDERAL  RESERVE  BOARD, OR ANY OTHER AGENCY.

     THESE SECURITIES HAVE NOT BEEN APPROVED  OR  DISAPPROVED BY THE SECURITIES
     AND EXCHANGE  COMMISSION OR ANY STATE  SECURITIES COMMISSION, NOR HAS THE
     FEDERAL OR ANY STATE SECURITIES COMMISSION PASSED ON THE ACCURACY OR
     ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A
     CRIMINAL OFFENSE.
    
     Information contained herein is subject to completion or amendment. A
     registration statement relating to these securities has been filed with the
     Securities and Exchange Commission but has not yet become effective. These
     securities may not be sold nor may offers to buy be accepted prior to the
     time the registration statement becomes effective. This prospectus shall
     not constitute an offer to sell or the solicitation of an offer to buy nor
     shall there be any sale of these securities in any State in which such
     offer, solicitation or sale would be unlawful prior to registration or
     qualification under the securities laws of any State.     
<PAGE>
 
<TABLE>     
<CAPTION>

TABLE OF CONTENTS
                                                         PAGE(S)
<S>                                                      <C>
 
Fund Expenses for Investor Class Shares................     3
 
Investment Objective, Policies and Risk Factors........     4
 
Management and Organization of the Fund................    13
 
Distribution Plan......................................    17
 
How to Buy Shares......................................    17
 
Purchasing through Retirement Plans....................    19
 
Net Asset Value........................................    19
 
When Your Account Will Be Credited.....................    20
 
Exchanging Shares......................................    20
 
Signature Guarantees...................................    22
 
Redeeming Shares.......................................    23
 
Redemptions in Kind....................................    25
 
Dividends, Capital Gains and Taxes.....................    25
 
Certain Shareholders of the Fund.......................    27
 
Total Return, Yield and Other Performance Information..    27
</TABLE>      

                                       2
<PAGE>
 
    
FUND EXPENSES FOR INVESTOR CLASS SHARES      

SHAREHOLDER TRANSACTION COSTS
 
     Maximum Sales Load on Purchases                 None
     Maximum Sales Load on Reinvested Dividends      None
     Deferred Sales Load                             None
     Redemption Fee                                  None *
     Exchange Fee                                    None

* If you request a redemption by wire transfer, you will be charged a $10 wire
fee.

    
ANNUAL FUND OPERATING EXPENSES FOR INVESTOR CLASS SHARES (AS A PERCENTAGE OF
AVERAGE NET ASSETS)(1):
<TABLE>
<S>                                  <C>
Management Fees                      0.68%
12b-1 Fees(2)                        0.25%
Other Expenses (3)                   0.00%
                                     ----
Total Fund Operating Expenses (3)    0.93%
</TABLE>      

    
(1)  The Fund's operating expenses are annualized and are estimated for the
fiscal year ending September 30, 1996.  Please refer to the section "Management
and Organization of the Fund" for further information.      
    
(2)  The effect of a Rule 12b-1 plan is that long-term shareholders in the Fund
may pay more than the economic equivalent of the maximum front-end sales charge
permitted by rules of the National Association of Securities Dealers, Inc.      
    
(3)  Pursuant to an Investment Advisory Agreement and an Administrative Services
Agreement, the Adviser pays all expenses of the Fund except fees under the
Agreements, interest, taxes, brokerage commissions and extraordinary expenses.
     
EXAMPLE:

We can illustrate these expenses with the example below. You would pay the
following expenses on a $1,000 investment (assuming a 5% annual return and
redemption at the end of each period):
    

One Year        $ 9.50
                ------
Three Years     $29.80
                ------
     
                                       3
<PAGE>
 
Explanation of Table:  The purpose of the table is to assist you in
understanding the various costs and expenses that an investor in the Fund would
bear directly (shareholder transaction costs) or indirectly (annual fund
operating expenses).  The information is based on amounts for the Fund's first
fiscal year period.

THE 5% RATE USED IN THE EXAMPLE IS FOR ILLUSTRATION ONLY AND IS NOT INTENDED TO
BE INDICATIVE OF THE FUTURE PERFORMANCE OF THE FUND, WHICH MAY BE MORE OR LESS
THAN THE ASSUMED RATE.  ACTUAL EXPENSES MAY BE MORE OR LESS THAN THOSE SHOWN.

                                       4
<PAGE>
 
                       
            INVESTMENT OBJECTIVE, POLICIES AND RISK FACTORS      

THE FUND SEEKS TO MAXIMIZE TOTAL RETURN.

INVESTMENT OBJECTIVE

            The investment objective of the Fund is to seek to maximize total
            return through a combination of income and capital appreciation.
            The Fund generally invests in high quality, highly liquid fixed-
            income securities.  Normally, the Fund will invest at least 80% of
            its total assets, in fixed-income securities rated A or better by
            Moody's Investors Service, Inc. ("Moody's") or Standard and Poor's
            Corporation ("S & P") or that are not rated by Moody's or S & P but
            are deemed to be of comparable quality by Lincoln Capital ("A-Grade
            Securities").  In the event that downgrades of securities cause less
            than 80% of the Fund's total assets to be invested in A-Grade
            Securities, Lincoln Capital will take steps as soon as practicable
            to increase the Fund's holdings of A-Grade Securities.  The Fund
            seeks to achieve its investment objective by implementing decisions
            regarding the level and direction of interest rates (duration and
            yield curve decisions) and through the purchase and sale of
            securities to take advantage of perceived yield spread
            opportunities.      
    
            The Fund may purchase any type of income producing security
            including, but not limited to, U.S. government and agency
            obligations, mortgage-backed and other asset-backed securities and
            commercial paper and corporate debt securities.  As a part of its
            overall investment strategy for the Fund, Lincoln Capital may use
            derivatives.  Derivatives are financial instruments whose value and
            performance are based on the value and performance of another
            security or financial instrument.  The risk of investments in
            derivatives varies with the type of derivative strategy used.
            Lincoln Capital will not purchase derivatives whose value is based
            on instruments in which the Fund could not invest directly.
            Derivative strategies are most often used to assist Lincoln Capital
            in establishing its desired duration and yield curve positions as
            described more fully below.  See "Additional Use of Derivatives" for
            more information.      

            The Fund will take reasonable risks in seeking to achieve its
            investment objective. There is, of course, no assurance that the
            Fund will be successful in meeting its objective since there is risk
            involved in the ownership of securities.

DURATION

            Duration is a measure of the expected life of a fixed-income
            security that was developed as a more precise alternative to the
            concept of term-to-maturity.  Duration incorporates a bond's yield,
            coupon interest payments, final maturity and call features into one
            measure.  Duration is also a way to measure the interest-rate
            sensitivity of the Fund's portfolio.   The duration of the Fund is
            calculated by averaging the durations of the bonds held by the Fund
            with each duration "weighted" according to the percentage of net
            assets that it represents.  In general, the higher the Fund's
            duration, the greater the appreciation or depreciation of the Fund's
            assets will be when interest rates change.  In its attempt to
            maximize total return, Lincoln Capital intends to vary the duration
            of the Fund, as described below, depending on its outlook for
            interest rates.

                                       5
<PAGE>
 
INVESTMENT PROCESS

            Interest Rate Decisions

            Lincoln Capital seeks to achieve a duration equal to the duration of
            the domestic, investment grade bond market when its outlook for
            interest rates is neutral.  The portfolio's average duration will be
            longer when Lincoln Capital believes that interest rates will fall
            and shorter when it believes interest rates will rise.  The stronger
            Lincoln Capital's conviction, the further the Fund's duration will
            diverge from the duration of the domestic, investment grade bond
            market, which generally averages approximately five years.  The
            Fund's duration will normally range from four to six years.  It is
            expected that only on rare occasions will the Fund's duration reach
            the extreme positions (plus or minus 2 years from the duration of
            the domestic, investment grade bond market).

            The Fund's duration relative to that of the domestic, investment
            grade bond market is established in periodic strategy meetings of a
            committee consisting of senior officers of Lincoln Capital.  Changes
            in the Fund's duration are based on a disciplined valuation of three
            factors:

            (a) Economic activity and capacity for growth;
            (b) U.S. Government monetary policy; and
            (c)  Expectations for inflation.

            The committee evaluates the above factors and weights each one to
            determine a precise duration position relative to the duration of
            the domestic, investment grade bond market.  Over time, changes in
            the duration position take the form of a series of small movements;
            generally in one-half year increments.
    
            Once the Fund's specific duration position has been established,
            remaining decisions (i.e. yield curve structure, sector emphasis and
            issue selections), are made and implemented by Lincoln Capital's
            Fixed Income Group working as a team.  These decisions are based on
            Lincoln Capital's belief that yield spreads reflect fundamental risk
            premiums.  These premiums reflect compensation for accepting credit
            risk or uncertain cash flow patterns (timing and amounts).  Lincoln
            Capital's judgments on these spreads are influenced by its outlook
            for business conditions and for the volatility of interest rates.
            These judgments are supported by studies of historical spread
            relationships and break-even spread analysis.  Cash equivalents may
            be used to create the desired yield curve structure.  Portfolio
            positions are continually monitored and evaluated.      

            Sector Emphasis and Security Selection

            Sector and security selection decisions are based on Lincoln
            Capital's judgment and are supported by studies of historical spread
            relationships, break-even yield spread analysis, and model driven
            portfolio return projections.  In order to monitor yield spreads,
            Lincoln Capital maintains extensive yield spread data banks and has
            direct computer access to extensive historical yield spread data and
            specific issuer data.

            Credit research consists of internally generated fundamental
            analysis and input from rating agencies and other sources. A
            committee of Lincoln Capital reviews those corporate bonds that are
            considered for purchase. By focusing on higher-rated securities, and
            by comparing

                                       6
<PAGE>
 
            judgments among outside sources to internal credit judgments,
            Lincoln Capital believes that credit risk can be managed and
            reduced.

            It is unlikely that Lincoln Capital will seek to enhance the Fund's
            return by anticipating an improvement in the creditworthiness of
            specific corporate issuers, particularly lower rated issuers.

RESEARCH PROCESS

            Virtually 100% of Lincoln Capital's fixed income research is
            generated in-house.  Each member of the investment staff serves as a
            portfolio manager and a research analyst.  There is no lapse between
            the development of an investment idea and its execution.
            Fundamental research includes economic analysis, sector and issuer
            spread relationships, and credit research.  In the area of
            quantitative research, Lincoln Capital owns proprietary models,
            developed in-house.  These include:  a mortgage prepayment model,
            mortgage valuation model, total return analytics for securities with
            complex cash flows, risk exposure models, and yield curve analytics.

INVESTMENTS

            IN GENERAL.  The Fund may invest in fixed-income securities which
            are obligations of, or guaranteed by the U.S. Government, its
            agencies or instrumentalities ("U.S. Government Securities").  U.S.
            Government Securities are unrated but are generally considered high-
            grade securities.  The Fund may also invest in other investment
            grade fixed-income securities, including corporate bonds, mortgage-
            backed and other asset-backed securities and other high quality,
            liquid investments.
    
            The debt securities in which the Fund will invest are investment
            grade securities.  These are securities rated in the four highest
            grades assigned by Moody's Investors Service, Inc. ("Moody's") or
            Standard and Poor's Corporation ("S & P") or that are not rated by
            Moody's or S & P but deemed to be of comparable quality by Lincoln
            Capital.  At least 80% of the Fund's total assets will be invested
            in A-Grade Securities, which are in the three highest grades, or the
            equivalent, while 20% of the total assets are not so limited.  The
            lowest investment grade securities have speculative characteristics
            because changes in economic conditions or other circumstances are
            more likely to lead to a weakened capacity to make principal and
            interest payments.  The Fund will not invest in securities below
            investment grade (so called "junk bonds").  In the event of a
            downgrade of a debt security held by the Fund to below investment
            grade, the Fund is not usually required to automatically sell the
            issue, but Lincoln Capital will consider whether to continue holding
            the security.  However, if such a downgrade would cause more than 5%
            of net assets to be invested in debt securities below investment
            grade, Lincoln Capital will take steps as soon as practicable to
            reduce the proportion of debt below investment grade to 5% of net
            assets or less.     

            The value of the shares issued by the Fund is not guaranteed and
            will fluctuate with changes in the value of the Fund's portfolio.
            Generally when prevailing interest rates rise, the value of the
            Fund's portfolio is likely to decline and when prevailing interest
            rates decline, the value of the Fund's portfolio is likely to rise.

            U.S. GOVERNMENT SECURITIES.  There are two basic types of U.S.
            Government Securities: (1) direct obligations of the U.S. Treasury,
            and (2) obligations issued or guaranteed by an agency or
            instrumentality of the U.S. Government. Agencies and
            instrumentalities of the 

                                       7
<PAGE>
 
            U.S. Government include Federal Farm Credit System ("FFCS"), Student
            Loan Marketing Association ("SLMA"), Federal Home Loan Mortgage
            Corporation ("FHLMC"), Federal Home Loan Banks ("FHLB"), Federal
            National Mortgage Association ("FNMA") and Government National
            Mortgage Association ("GNMA"). Some obligations issued or guaranteed
            by agencies or instrumentalities, such as those issued by GNMA, are
            fully guaranteed by the U.S. Government. Others, such as FNMA bonds,
            rely on the assets and credit of the instrumentality with limited
            rights to borrow from the U.S. Treasury. Still other securities,
            such as obligations of the FHLB, are supported by more extensive
            rights to borrow from the U.S. Treasury.

            The guarantees of the U.S. Government, its agencies and
            instrumentalities are guarantees of the timely payment of principal
            and interest on the obligations purchased and not of their market
            value.

            MORTGAGE RELATED SECURITIES

            Pass-Through Securities.  The Fund may invest in GNMA Certificates
            which are mortgage-backed securities representing part ownership of
            a pool of mortgage loans.  A "pool" or group of such mortgages is
            assembled and, after being approved by GNMA, is offered to investors
            through securities dealers.  Once approved by GNMA, the timely
            payment of interest and principal on each mortgage is guaranteed by
            GNMA and backed by the full faith and credit of the U.S. Government.
            GNMA Certificates differ from bonds in that principal is paid back
            monthly by the borrower over the term of the loan rather than
            returned in a lump sum at maturity.  GNMA Certificates are called
            "pass-through" securities because both interest and principal
            payments (including prepayments) are passed through to the holder of
            the Certificate.

            The Fund may also invest in pools of mortgages which are issued or
            guaranteed by other agencies of the U.S. Government such as FNMA or
            FHLMC.  FNMA and FHLMC Certificates are similar to GNMA Certificates
            except that timely payment of interest and principal of each
            mortgage may not be guaranteed by the full faith and credit of the
            U.S. Government.

            The average life of pass-through pools varies with the maturities of
            the underlying mortgage instruments.  In addition, a pool's term may
            be shortened by unscheduled or early payment of principal and
            interest on the underlying mortgages.  The occurrence of mortgage
            prepayments is affected by the level of interest rates, general
            economic conditions, the location and age of the mortgage and other
            social and demographic conditions.  As prepayment of individual
            pools varies widely, it is not possible to precisely predict the
            average life of a particular pool.

            Collateralized Mortgage Obligations.  The Fund may also invest in
            collateralized mortgage obligations ("CMO"s).  CMOs are debt
            securities issued by a corporation, trust or custodian or by a U.S.
            Government agency or instrumentality, which are collateralized by
            mortgage pass-through securities.  Cash flows from the mortgage
            pass-through securities are allocated to various tranches (a
            "tranche" is essentially a separate security) in a predetermined,
            specified order.  Each tranche has a stated maturity (the latest
            date by which the tranche can be completely repaid, assuming no
            prepayments) and has an average life (the average of the time to
            receipt of a principal payment weighted by the size of the principal
            payment).  The average life is typically used as a proxy for
            maturity because the debt is 

                                       8
<PAGE>
 
            amortized (repaid a portion at a time), rather than being paid off
            entirely at maturity, as would be the case in a straight debt
            instrument.

            Interest and principal payments from the underlying mortgages are
            typically used to pay interest on all CMO tranches and to retire
            successive class maturities in a sequence.  Thus, the issuance of
            CMO tranches with varying maturities and interest rates may result
            in greater predictability of maturity with one tranche and less
            predictability of maturity with another tranche than a direct
            investment in a mortgage-backed pass-through security (such as a
            GNMA Certificate).  Tranches with shorter maturities typically have
            a lower volatility and lower yield while those with longer
            maturities typically have higher volatility and higher yield.  Thus,
            investments in CMOs can carry more or less risk than mortgage pass-
            through securities and offer more defensive or aggressive investment
            alternatives.

            Stripped Mortgage-Backed Securities.  Stripped mortgage securities
            are created when the principal and interest payments on a pool of
            mortgages in a CMO are separated or "stripped" to create two classes
            of securities.  In general, the interest-only, or "IO" class of
            stripped securities, receives all interest and no principal
            payments, while the principal-only, or "PO" class, is entitled to
            receive all principal and no interest payments.  The value of
            stripped mortgage securities can be volatile and are sensitive to
            prepayment rates on the mortgages underlying the stripped
            securities.
    
            Mortgage Dollar Rolls.  The Fund may enter into "mortgage dollar
            rolls," which are transactions in which the Fund sells a mortgage-
            related security to a dealer and simultaneously agrees to repurchase
            a similar security (but not the same security) in the future at a
            pre-determined price.  See "Mortgage Dollar Rolls" in the Fund's
            Statement of Additional Information for more information regarding
            this type of transaction.       

            Additional Risks. Investment by the Fund in mortgage-related U.S.
            Government Securities, such as GNMA Certificates, and CMOs also
            involves other risks.  The yield on a pass-through security is
            typically quoted based on the maturity of the underlying instruments
            and the associated average life assumption.  Actual prepayment
            experience may cause the yield to differ from the assumed average
            life yield.  Accelerated prepayments adversely impact yields for
            pass-throughs purchased at a premium; the opposite is true for pass-
            throughs purchased at a discount.  During periods of declining
            interest rates, prepayment of mortgages underlying pass-through
            certificates can be expected to increase.  When the mortgage
            obligations are prepaid, the Fund reinvests the prepaid amounts in
            securities, the yields of which reflect interest rates prevailing at
            that time.  Therefore, the Fund's ability to maintain a portfolio of
            high-yielding, mortgage-backed securities will be adversely affected
            to the extent that prepayments of mortgages must be reinvested in
            securities which have lower yields than the prepaid mortgages.
            Moreover, prepayments of mortgages which underlie securities
            purchased at a premium could result in capital losses.

            OTHER ASSET-BACKED SECURITIES

            The Fund may invest in asset-backed securities which are backed by
            assets other than mortgages. These securities are collateralized by
            shorter term loans such as automobile loans, computer leases, or
            credit card receivables. The payments from the collateral are passed
            through to the security holder. The collateral behind asset-backed
            securities tends to have prepayment rates that do not vary with
            interest rates. In addition, the short-term nature of the loans
            reduces the impact of any change in prepayment level. These
            securities

                                      9
<PAGE>
 
            are generally issued as the debt of a special purpose entity
            organized solely for the purpose of owning such assets and issuing
            such debt.

            Credit Support.  Asset-backed securities are backed by a diversified
            pool of assets representing the debt of a number of different
            parties.  To lessen the effect of failures by the debtors to make
            payments, such securities may contain elements of credit support.
            Such credit support falls into two classes:  liquidity protection
            and protection against ultimate default by debtors on the underlying
            assets.  Liquidity protection refers to the provision of advances,
            generally by the entity administering the pool of assets, to ensure
            that scheduled payments on the underlying pool are made in a timely
            fashion.  Protection against ultimate default ensures repayment of
            at least a portion of the debt in the pool.  Such protection may be
            provided through guarantees, insurance policies or letters of credit
            obtained from third parties, through various means of structuring
            the transaction or through a combination of such approaches.

            Additional Risks.  Issuers of asset-backed securities generally hold
            no assets other than the assets underlying such securities and any
            credit support provided.  As a result, although payments on asset-
            backed securities are obligations of the issuers, in the event of
            defaults on underlying assets not covered by any credit support, the
            issuers are unlikely to have sufficient assets to satisfy their
            obligations on the related asset-backed securities.  The loans
            underlying these securities are subject to prepayments which can
            decrease maturities and returns.  Due to the possibility that
            prepayments will alter the cash flow on asset-backed securities, it
            is not possible to determine in advance the actual final maturity
            date or average life.  Faster prepayment will shorten the average
            life and slower prepayments will lengthen it.  However, it is
            possible to determine what the range of that movement could be and
            to calculate the effect that it will have on the price of the
            security.

            The values of these securities are ultimately dependent upon payment
            of the underlying loans by individuals, and the holders, such as the
            Fund, generally have no recourse against the originator of the
            loans.  The Fund as a holder of these securities may experience
            losses or delays in payment if the original payments of principal
            and interest are not made to the issuer with respect to the
            underlying loans.

            CORPORATE BONDS

            The Fund may invest in investment grade corporate bonds.  Usually,
            no single corporate issuer will comprise more than 5% of the Fund's
            total assets at the time of investment.  The value of lower-rated
            corporate debt securities is more sensitive to economic changes or
            individual corporate developments than higher-rated investments.
            The Fund will normally invest in corporate issues that are rated A
            or better by Moody's or S & P or which are not rated by Moody's or S
            & P but are deemed by Lincoln Capital to be of comparable quality.

            Some of the debt securities in which the Fund may invest are known
            as "Yankee Bonds."  Yankee Bonds are U.S. dollar-denominated debt
            securities issued by foreign entities.  These bonds are not subject
            to currency fluctuation risks.  However, the issuing entities are
            sometimes not subject to the same accounting principles as U.S.
            corporations. The risks of investment in foreign issuers may include
            expropriation or nationalization of assets, confiscatory taxation,
            exchange controls and limitations on the use or transfer of assets,
            and significant withholding taxes. Lincoln Capital will take these
            factors into consideration 

                                      10
<PAGE>
 
            when determining what Yankee Bonds the Fund will purchase. Other
            than Yankee Bonds, the Fund does not intend to invest in securities
            of foreign issuers.
    
            ADDITIONAL USE OF DERIVATIVES      

            Inverse Floating Rate Obligations.  The Fund may invest in inverse
            floating rate obligations which are commonly referred to as "inverse
            floaters."  Inverse floaters have coupon rates that vary inversely
            at a multiple of a designated floating rate, such as LIBOR (London
            Inter-Bank Offered Rate).  Any rise in the reference rate of an
            inverse floater (due to an increase in prevailing interest rates)
            causes a drop in the coupon rate, while any drop in the reference
            rate of an inverse floater causes an increase in the coupon rate.
            In addition, like most other fixed-income securities, the value of
            inverse floaters will generally decrease as interest rates increase.
            Inverse floaters may exhibit substantially greater price volatility
            than fixed rate obligations having similar credit quality,
            redemption provisions and maturity.  Inverse floater CMOs exhibit
            greater price volatility than the majority of mortgage pass-through
            securities or other CMOs.  In addition, some inverse floater CMOs
            exhibit extreme sensitivity to changes in the rate of prepayments.
            As a result, the yield to maturity of an inverse floater CMO is
            sensitive not only to changes in interest rates but also to changes
            in prepayment rates on the related underlying mortgage assets.  The
            Fund does not intend to invest in an inverse floater if, at the time
            of such investment, more than 5% of the Fund's net assets would be
            invested in inverse floaters.

            Futures Contracts.  The Fund may purchase and sell interest rate
            futures contracts ("futures contracts"), which are described in the
            Appendix to the Statement of Additional Information, for the purpose
            of hedging its portfolio of fixed-income securities against the
            adverse effects of anticipated movements in interest rates or as an
            efficient means of adjusting its exposure to the bond market.
            Futures contracts provide for the sale by one party and purchase by
            another party of a specified amount of a specific security, at a
            specified future time and price.  The terms of a futures contract
            either call for actual delivery of the underlying financial
            instrument, or the making of a cash payment or settlement.  In most
            cases the contracts are closed out before the delivery date without
            delivery taking place.

            The Fund may use futures contracts to adjust portfolio duration and
            manage interest rate risk.  Futures have durations which, in
            general, are closely related to the duration of the securities which
            underlie them.  Buying futures increases the duration of the
            portfolio while selling futures decreases the duration.  The Fund
            may be able to maintain a particular duration for a fraction of the
            cash investment required to purchase the underlying security.
            However, to the extent that the Fund sells futures that are not
            "covered" by securities held in the portfolio or purchases futures,
            the Fund is required to set aside cash or cash equivalents in a
            segregated account equal, on a daily basis, to the Fund's obligation
            on the futures contract.  Such segregated funds will earn income but
            will not otherwise be available for investment.

            The Fund will not engage in a futures transaction if it would cause
            the aggregate of initial margin deposits which do not represent bona
            fide hedging to exceed 5% of the value of total assets.  The
            successful use of futures for hedging purposes depends on Lincoln
            Capital's ability to forecast interest rate movements. Should
            interest rates move in an unexpected manner, the Fund may not
            achieve the anticipated benefits of the futures contracts and thus
            may be in a worse position than if such strategies had not been
            used. 

                                      11
<PAGE>
 
            See the Statement of Additional Information for a more detailed
            discussion of the risks involved in the use of futures.


DELAYED DELIVERY TRANSACTIONS

            The Fund may purchase or sell securities on a when-issued basis.
            When-issued securities are securities purchased at a certain price
            even though the securities may not be delivered for up to 90 days.
            The Fund will maintain, with its Custodian, a separate account with
            a segregated portfolio of liquid, high-grade debt securities or cash
            in an amount at least equal to these commitments.  The Fund will
            generally earn income on assets deposited in the segregated account.
            No payment or delivery is made by the Fund in a when-issued
            transaction until it receives payment or delivery from the other
            party to the transaction.  Although the Fund receives no income from
            the above described securities prior to delivery, the market value
            of such securities is still subject to change.  As a consequence, it
            is possible that the market price of the securities at the time of
            delivery may be higher or lower than the purchase price.  The Fund
            does not intend to remain fully invested when such purchases are
            outstanding.  However, if the Fund were to remain substantially
            fully invested at a time when delayed delivery purchases are
            outstanding, the delayed delivery purchases could result in a form
            of leveraging.  When the Fund has sold a security on a delayed
            delivery basis, the Fund does not participate in future gains or
            losses with respect to the security.  If the other party to a
            delayed delivery transaction fails to deliver or pay for the
            securities, the Fund could miss a favorable price or yield
            opportunity or could suffer a loss.  The Fund may dispose of or
            renegotiate a delayed delivery transaction after it is entered into,
            and may sell when-issued securities before they are delivered, which
            may result in a capital gain or loss.

ILLIQUID SECURITIES

            The Fund will not purchase or hold illiquid securities if more than
            15% of the Fund's net assets would then be illiquid.  If at any time
            more than 15% of the Fund's net assets are illiquid, sales will be
            made as soon as practicable to reduce the percentage of illiquid
            assets to 15% or less.

RULE 144A SECURITIES

            The Fund may invest in restricted securities, i.e., securities
            which, if sold, would cause the Fund to be deemed an "underwriter"
            under the Securities Act of 1933 (the "1933 Act") or which are
            subject to contractual restrictions on resale. The restricted
            securities which the Fund may purchase include securities which have
            not been registered under the 1933 Act but are eligible for purchase
            and sale pursuant to Rule 144A ("Rule 144A Securities"). This Rule
            permits certain qualified institutional buyers, such as the Fund, to
            trade in privately placed securities even though such securities are
            not registered under the 1933 Act. As a matter of non-fundamental
            policy, Lincoln Capital will only purchase Rule 144A Securities that
            Lincoln Capital determines to be liquid. In making this
            determination, Lincoln Capital will consider the frequency of trades
            and quotes, the number of dealers and potential purchasers, dealer
            undertakings to make a market, and the nature of the security and
            the market place trades (for example, the time needed to dispose of
            the security, the method of soliciting offers and the mechanics of
            transfer). The liquidity of Rule 144A Securities will also be
            monitored by Lincoln Capital and, if as a result of changed
            conditions, it is determined that a Rule 144A Security is no longer
            liquid, the Fund's holding of illiquid securities will be reviewed
            to determine what, if any, action is appropriate in light of the
            policy limiting investments in such securities to 15% of the Fund's
            total assets. There is no limitation on the percentage of the Fund's
            assets that can be invested in liquid Rule 144A Securities.
            Investing in Rule 144A Securities could have

                                      12
<PAGE>
 
            the effect of increasing the amount of investments in illiquid
            securities if qualified institutional buyers are unwilling to
            purchase such securities.

REPURCHASE AGREEMENTS

            The Fund may enter into repurchase agreements.  A repurchase
            agreement is an arrangement under which the Fund buys securities and
            the seller (a bank or securities dealer that Lincoln Capital
            believes to be financially sound) simultaneously agrees to
            repurchase the security within a specified time at a higher price
            that includes an amount representing interest on the purchase price.
            In the event of a default by a seller of a repurchase agreement, the
            Fund could experience both delays in liquidating the underlying
            securities and potential losses.  The Fund will normally invest in
            repurchase agreements maturing in less than seven days.  Repurchase
            agreements maturing in more than seven days are deemed to be
            illiquid and thus subject to the Fund's 15% limitation on
            investments in illiquid securities described above.
    
INVESTMENT DIVERSIFICATION AND CONCENTRATION      

            As to seventy-five percent of the Fund's total assets, the Fund will
            not purchase the security of any issuer (other than cash items or
            U.S. Government Securities) if such purchase would cause the Fund's
            holdings of that issuer to amount to more than 5% of the Fund's
            total assets at the time of purchase.  The remaining 25% of the
            Fund's total assets are not so limited which allows Lincoln Capital
            to invest more than 5% of the Fund's total assets in a single
            issuer.  In the event that Lincoln Capital chooses to make such an
            investment, it may expose the Fund to greater risk.  No investment
            in a single corporate issuer will be made if, at that time, such
            issuer would represent more than 5% of the Fund's total assets.  A
            single issuer of asset-backed securities may at times represent up
            to 10% of the Fund's total assets.

            The Fund will not concentrate 25% or more of its total assets in any
            one industry.  Securities of the U.S. Government, its agencies and
            instrumentalities are not deemed to be industries for this purpose.
     
BORROWING

            The Fund may not borrow money to purchase securities.  The Fund may
            borrow money only for temporary or emergency purposes, and then only
            from banks in an amount not exceeding 33-1/3% of the value of the
            Fund's total assets (including amounts borrowed).  The Fund will not
            purchase securities when its borrowings, less amounts receivable on
            sales of portfolio securities, exceed 5% of total assets.      

CERTAIN INVESTMENT RESTRICTIONS

            In addition to other non-fundamental restrictions as described
            herein and in the Statement of Additional Information, the Fund will
            not (i) invest in securities that are rated below investment grade
            or are deemed by Lincoln Capital to be the equivalent, if unrated;
            (ii) enter into reverse repurchase agreements;  (iii) engage in
            options transactions; (iv) purchase foreign securities other than
            Yankee Bonds or (v) use leverage except to the extent that certain
            strategies, such as delayed-delivery or futures transactions, may be
            considered leveraged transactions by the Securities and Exchange
            Commission.

PORTFOLIO TRANSACTIONS

            Lincoln Capital is responsible for the placement of portfolio
            transactions.  It is the Fund's policy to seek to place portfolio
            transactions with brokers or dealers on the basis of best execution.

                                      13
<PAGE>
 
            Generally, Lincoln Capital manages the Fund without regard to
            restrictions on portfolio turnover, except those imposed on its
            ability to engage in short-term trading by provisions of the federal
            tax laws.  The use of futures contracts and other derivative
            instruments with relatively short maturities may tend to exaggerate
            the portfolio turnover rate for the Fund.  Trading in fixed-income
            securities does not generally involve the payment of brokerage
            commissions, but does involve indirect transaction costs.  The use
            of futures contracts may involve the payment of commissions to
            futures commission merchants.  The higher the rate of portfolio
            turnover of the Fund, the higher all these transaction costs borne
            by the Fund generally will be.  The Fund's annual turnover rate may
            exceed 100% due to changes in portfolio duration, yield curve
            strategy, or sector decisions; however, it is expected that the
            annual turnover rate will not exceed 300%.  A portfolio turnover
            rate of 300% would mean that the securities in the Fund's portfolio
            were replaced three times in a year.  An annual turnover rate which
            exceeds 100% is considered to be high.      

FUNDAMENTAL POLICIES MAY NOT BE CHANGED WITHOUT SHAREHOLDER APPROVAL.

            The Fund's investment objective and the investment restrictions set
            forth as fundamental in the Statement of Additional Information,
            including those in respect to investment concentration and the 33-
            1/3% limitation on borrowing as discussed above, are fundamental
            policies and may not be changed without a shareholder vote.  All
            other investment policies of the Fund are not fundamental and may be
            changed by the Board of Trustees.  Any percentage restrictions
            (except those with respect to borrowing and illiquid securities)
            apply at the time of investment without regard to later increases or
            decreases in the values of securities or total or net assets.

            MANAGEMENT AND ORGANIZATION OF THE FUND

            The Fund is a series of Ariel Growth Fund (doing business as Ariel
            Investment Trust) (the "Trust"), an open-end diversified management
            investment company organized as a Massachusetts business trust on
            August 1, 1986.  The other series currently offered, which are sold
            under a separate prospectus, are Ariel Growth Fund and Ariel
            Appreciation Fund.
    
            Shares of the Fund are currently issued in two classes, the
            Institutional Class and the Investor Class.  The Investor Class
            shares require an initial minimum investment of $1,000 or more. See
            "How to Buy Shares - Initial Purchase."  The Institutional Class
            requires an initial minimum investment of $1,000,000 and is sold
            primarily to institutional investors.  The Board of Trustees may
            offer additional classes in the future and may at any time
            discontinue the offering of any class of shares.  Each share of the
            Fund represents an interest in the assets of the Fund and has
            identical voting, dividend, liquidation and other rights and the
            same terms and conditions as any other shares except that (i) the
            expenses that are specific to one class, such as distribution
            expenses and administrative fees, are borne solely by such class and
            (ii) each class of shares votes separately with respect to matters
            in which the interests of one class differ from the interests of the
            other class or on any other matters for which separate class voting
            is appropriate under applicable law.       

            Because the Investor Class incurs higher administrative and
            distribution fees, that class will have a higher expense ratio and
            will have correspondingly lower returns than the Institutional
            Class. You may call 1-800-29-ARIEL (1-800-292-7435) for more
            information regarding the Institutional Class of the Fund.      

                                      14
<PAGE>
 
            The Trust does not hold annual shareholder meetings.  Shareholder
            meetings are held when they are required under the Investment
            Company Act of 1940 or otherwise called for special purposes.
            Special meetings may be called upon the request of shareholders
            holding at least 10% of the Fund's outstanding shares.  Trustees may
            be removed at a special meeting of shareholders by a vote of two-
            thirds of the outstanding shares.  As a shareholder, you receive one
            vote for each share of the Fund you own.      

THE BOARD OF TRUSTEES SUPERVISES THE FUND'S ACTIVITIES AND REVIEWS THE TRUST'S
CONTRACTS WITH COMPANIES THAT PROVIDE SERVICES TO THE FUND.

            BOARD OF TRUSTEES

            MARIO L. BAEZA, ESQ.
            President, Wasserstein Perella International Limited; Managing
            Director and Chief Executive Officer, Americas Division, Wasserstein
            Perella & Co., Inc.

            WILLIAM C. DIETRICH, CPA
            Chief Financial Officer, Home Shopping Alternatives, Inc.

            ROYCE N. FLIPPIN, JR., MBA
            President, Flippin Associates; formerly Director of Program
            Advancement, Massachusetts Institute of Technology

            JOHN G. GUFFEY, JR.
            Chair, Calvert Social Investment Foundation; Treasurer and Director,
            Silby, Guffey and Co., Inc.

            MELLODY L. HOBSON
            Senior Vice President, Director of Marketing, Ariel Capital
            Management, Inc.

            CHRISTOPHER G. KENNEDY, MBA
            Executive Vice President and Director, Merchandise Mart Properties,
            Inc.

            ERIC T. McKISSACK, CFA, MBA
            Vice Chairman and Co-Chief Investment Officer, Ariel Capital
            Management, Inc.

            BERT N. MITCHELL, MBA, CPA
            Founder, Chairman and Chief Executive Officer, Mitchell/Titus & Co.

ARIEL CAPITAL MANAGEMENT, INC. SERVES AS THE ADVISER TO THE FUND.

            Subject to the overall supervision of the Board of Trustees and
            pursuant to the Investment Advisory Agreement, Ariel Capital
            Management, Inc. (the "Adviser") acts as the investment adviser to
            the Fund.  Under the Investment Advisory Agreement, the Adviser
            performs or supervises the investment and reinvestment of the assets
            of the Fund, is responsible for certain management services and pays
            all of the Fund's expenses other than the Adviser's fees under the
            Investment Advisory Agreement and the Administrative Services
            Agreement, the expenses assumed by the Adviser under the
            Administrative Services Agreement, interest, taxes, brokerage
            commissions, and extraordinary expenses. Under the Investment
            Advisory Agreement, the      

                                      15
<PAGE>
 
            Adviser is paid a fee based on the average daily net assets of the
            Fund at the annual rates of 0.43% if such net assets are less than
            $500 million; 0.41% if such net assets are at least $500 million,
            but less than $1 billion; 0.39% if such net assets are at least $1
            billion, but less than $1.5 billion; 0.37% if such net assets are at
            least $1.5 billion, but less than $2 billion; and 0.35% if such
            assets are $2 billion or more. The Adviser also acts as
            Administrator to the Fund (see below) and investment adviser and
            administrator to Ariel Growth Fund and Ariel Appreciation Fund, the
            other two series of the Trust.      

            The Adviser is a privately held investment management firm,
            controlled by John W. Rogers, Jr. and owned by its employees.  The
            Adviser is located at 307 N. Michigan Avenue, Suite 500, Chicago,
            Illinois 60601.

ARIEL DISTRIBUTORS, INC. IS THE PRINCIPAL UNDERWRITER TO THE FUND

            Ariel Distributors, Inc. serves as the principal underwriter.  Under
            the terms of its Underwriting Agreement, Ariel Distributors markets
            and distributes the shares of the Trust and is responsible for
            payment of commissions and service fees to broker-dealers, banks,
            and financial services firms, preparation of advertising and sales
            literature, and printing and mailing of prospectuses to prospective
            investors.  Pursuant to the Underwriting Agreement, Ariel
            Distributors receives a fee at the annual rate of 0.25% of the
            average daily net assets of the Investor Class.       

SUB-ADVISER

            Lincoln Capital Management Company ("Lincoln Capital"), 200 South
            Wacker Drive, Chicago, IL  60606, acts as Lincoln Capital of the
            Fund.  Lincoln Capital manages the day-to-day investment operations
            for the Fund.  The Fund pays no fees directly to Lincoln Capital.
            Lincoln Capital receives fees from the Adviser at the annual rate of
            0.30% of the average daily net assets up to $50 million; 0.20% for
            the next $50 million; 0.15% for the next $150 million and 0.10% for
            amounts greater than $250 million.       

            The Managing Directors and controlling shareholders of Lincoln
            Capital and their titles, are as follows:

               John W. Croghan, Chairman
               J. Parker Hall, III, President
               Kenneth R. Meyer, Executive Vice President
               Timothy H. Ubben, Executive Vice President
               Ray B. Zemon, Executive Vice President

PORTFOLIO MANAGEMENT

            The Fund's duration decisions are made by a strategy committee
            comprising five senior officers of Lincoln Capital: John W. Croghan,
            J. Parker Hall III, Richard W. Knee, Kenneth R. Meyer, and Ray B.
            Zemon.   The five members of the strategy committee have been with
            Lincoln Capital for over 10 years and average 26 years of investment
            experience.  Investment selections for the Fund are made by members
            of the fixed income group: Terrence J. Glomski, Lorraine L. Holland,
            Andrew A. Johnson, Brian D. Johnson, Richard W. Knee, Kenneth R.
            Meyer, Thomas K. Parrent, and Ray B. Zemon.  The eight members of
            the fixed income group average 16 years of investment experience.

                                      16
<PAGE>
 
PERFORMANCE HISTORY OF SUB-ADVISER

            Although Lincoln Capital has no operational history with the newly
            organized Fund, set forth below are certain performance data,
            provided by Lincoln Capital, relating to annual average investment
            results of a composite of client advisory accounts ("Advisory
            Accounts") whose portfolios were managed by Lincoln Capital over a
            period of thirteen years, since Lincoln Capital began operations.
            The Advisory Accounts had the same investment objective as the Fund
            and were managed using substantially similar, though not necessarily
            identical investment strategies and techniques as those contemplated
            by the Fund.  Because of the similarities in investment strategies
            and techniques, Lincoln Capital believes that the Advisory Accounts
            are sufficiently comparable to the Fund to make the performance data
            listed below relevant to investors in the Fund.  Also set forth
            below, for comparison, are the performances of widely recognized
            indices of market activity based upon the aggregate performance of
            selected unmanaged portfolios of publicly traded fixed-income
            securities.      
         
            The results presented are not intended to predict or suggest returns
            that will be experienced by the Fund or the return that an investor
            will achieve by investing in the Fund.  The Fund is subject to
            different costs, including investment, management and registration
            fees that were not incurred by the Advisory Accounts.  Different
            methods of determining the preference from those described in the
            footnote to the chart below may result in different performance
            figures. Investors should not rely on the following data as an
            indication of future performance of Lincoln Capital or of the Fund.
     

                              ANNUAL TOTAL RETURN
                              -------------------
<TABLE>
<CAPTION>
 
                                                                                          Salomon Brothers
                Number of    Average Account                         Lehman Brothers     Broad Investment-
 Time Period   of Accounts  Size ($ millions)  Lincoln Accounts(1)  Aggregate Index(2)  Grade Bond Index(2)
- -------------  -----------  -----------------  -------------------  ------------------  --------------------
<S>            <C>          <C>                <C>                  <C>                 <C>
    1982                13              $ 45             %37.20              %32.62                %31.79
    1983                17                49               7.62                8.36                  8.21
    1984                20                61              14.33               15.15                 14.99
    1985                16                92              24.92               22.10                 22.26
    1986                20               102              17.49               15.26                 15.43
    1987                20               111               3.24                2.76                  2.60
    1988                24               109               7.41                7.89                  7.99
    1989                27                99              14.71               14.53                 14.43
    1990                29               123               8.47                8.96                  9.09
    1991                29               168              15.81               16.00                 15.98
    1992                33               165               7.83                7.40                  7.58
    1993                33               163              11.22                9.75                  9.92
    1994                31               143              -2.13               -2.92                 -2.85
</TABLE>
(1)         These figures are dollar-weighted, average annual investment results
            expressed as a percentage return.  Returns shown for Lincoln Capital
            are after deduction of investment advisory fees.  The accounts
            represented in the composite are all accounts managed in a manner
            that is substantially similar to the investment management of the
            Fund and are most of Lincoln Capital's active accounts.      

                                      17
<PAGE>
 
(2)         The Lehman Brothers Aggregate Index and the Salomon Brothers Broad
            Investment-Grade Bond Index are unmanaged indices of fixed-income
            securities which are composed of securities that are substantially
            similar to the types of securities in which the Advisory Accounts
            and the Fund invest.

    
ARIEL CAPITAL MANAGEMENT, INC. SERVES AS THE ADMINISTRATOR TO THE FUND.      
    
               The Adviser is also the Fund's Administrator.  Under the
               Administrative Services Agreement, the Adviser is responsible for
               providing, arranging for or facilitating transfer agency and
               shareholder servicing; the preparation, printing and distribution
               of notices, proxy materials, reports to regulatory bodies and
               reports to shareholders related to a specific class; state
               securities qualifications; SEC registrations and shareholder
               meetings.  The Administrator pays all of the Fund's expenses
               related to the services to be provided under the Administrative
               Services Agreement, all fees and expenses of Trustees incurred as
               a result of a matter related solely to one class of shares of the
               Fund and, generally, the Fund's auditing and legal fees for
               professional services related solely to one class of the shares
               of the Fund.  The Administrator is not responsible for paying any
               legal, accounting or other expenses related to any litigation
               affecting the Fund.  For services under the Administrative
               Services plan, the Investor Class pays a fee based on the average
               daily net assets of the Investor Class at the annual rates of
               0.25% if such net assets are less than $1 billion; 0.225% if such
               net assets are at least $1 billion, but less than $2 billion and
               0.20% if such net assets are at least of $2 billion or more. 
     

THE TRANSFER AGENT AND CUSTODIAN.
            Investors Fiduciary Trust Company ("IFTC") is the Fund's transfer
            agent, custodian and dividend disbursing and shareholder servicing
            agent.


            DISTRIBUTION PLAN
    
            The Investor Class of the Fund bears some of the cost of selling,
            marketing and distributing its shares under a Distribution Plan
            adopted pursuant to Rule 12b-1 under the 1940 Act (the "Plan").  The
            Plan authorizes payments by the Investor Class to the Distributor of
            up to 0.30% annually of the average daily net asset value of the
            Investor Class, but payments under the Plan are currently limited by
            the Board of Trustees to 0.25% annually of such average daily net
            asset value.  Payments pursuant to the Plan are included in the
            operating expenses of the Investor Class.      
    
            The Plan may be terminated at any time by vote of the Trustees who
            are not interested persons of the Adviser or the Fund and have no
            direct or indirect financial interest in the Plan or by a vote of a
            majority of the outstanding Investor Class shares.      
    
            A dealer having a sales agreement with the Distributor may receive
            from the Distributor up to 0.25% of the annual average daily net
            assets of Investor Class shares held in its customers' accounts as
            ongoing service and account maintenance fees.  The Adviser also may
            make expense reimbursements for special training and education of a
            dealer's registered representatives.      


                                      18
<PAGE>
 
            HOW TO BUY SHARES

INITIAL PURCHASES
    
            The minimum initial investment in the Investor Class is $1,000, or
            $250 for retirement accounts, unless you participate in an automatic
            investment plan, in which case there is a $50 minimum. A completed
            and signed application is required for each new account you open,
            regardless of the method you choose for making your initial
            investment. An account application accompanies this prospectus.
            Additional forms may be required from corporations, associations and
            certain financial institutions. If you have any questions or need
            additional applications, call 1-800-29-ARIEL (1-800-292-7435).      

BY MAIL
            To purchase shares by mail, please make your check payable to ARIEL
            MUTUAL FUNDS and mail it with an application, indicating which of
            the Ariel Mutual Funds you would like to buy, to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121
BY WIRE
            You may also purchase shares by bank wire. Just call us at 1-800-29-
            ARIEL (1-800-292-7435) and we will ask you your name, address,
            social security or tax identification number, the amount of your
            investment, the name of the Ariel Mutual Fund in which you wish to
            invest as well as the name and address of the financial institution
            that will be wiring your investment to the Fund.  We will
            immediately give you an account number and you may then have your
            financial institution wire federal funds to the Custodian with the
            following instructions:

               Ariel Mutual Funds
               c/o Investors Fiduciary Trust Company
               127 West 10th Street
               Kansas City, MO 64105
               ABA #101003621
               Account No. 7528205

               The name of the Ariel Mutual Fund(s) and the class in which you
               wish to invest
               Your shareholder account number
               The name in which your account is registered

            We accept wires at no charge. However, your bank may charge you for
            this service.

SUBSEQUENT PURCHASES

            You may make subsequent investments in the minimum amount of $50.
            To invest directly by bank wire, follow the instructions as shown
            above for initial investments, except that there is no need to call
            us first.  Just contact your financial institution.

            To add to your account by mail, please send your check or money
            order payable to Ariel Mutual Funds with the detachable stub from
            the bottom of your most recent account statement, or drop us a note
            that includes the registered account name, account number, the 

                                      19
<PAGE>
 
            name of the Fund and amount you wish to invest. Please remember that
            subsequent purchases should be sent to:

               Ariel Mutual Funds
               P.O. Box 419641
               Kansas City, Missouri 64141-6641


AUTOMATIC INVESTING THROUGH YOUR BANK

            You may arrange for automatic investing whereby the Custodian will
            be authorized to initiate a debit to your bank account of a specific
            amount (minimum $50) to be used to purchase shares of the Fund on a
            monthly or quarterly basis.  After each automatic investment, you
            will receive a transaction confirmation and the debit should be
            reflected on your next bank statement. You may terminate the plan at
            any time, and we may modify or terminate the plan at any time. If,
            however, you terminate an automatic investment plan with an account
            balance of less than $1,000, we reserve the right to close your
            account. See "Redeeming Shares - Other Information About
            Redemptions" on page ____. If you desire to utilize this automatic
            investment option, please indicate your intention to do so on the
            application included with this prospectus.

            PURCHASING THROUGH RETIREMENT PLANS      

            You may also purchase shares of the Fund through one of several tax-
            deferred retirement plans.  For more information, see "Tax Saving
            Retirement Plans" on page ____.


            OTHER INFORMATION ABOUT PURCHASING SHARES

            Although there is no sales charge imposed by the Fund when you
            purchase shares, certain dealers or financial institutions which
            sell shares of Ariel Mutual Funds may impose charges for their
            services, and such charges may constitute a significant portion of a
            smaller account.

            The Fund does not issue share certificates unless you specifically
            request one each time you make a purchase. Certificates are not
            issued for fractional shares or to shareholders who have elected a
            systematic withdrawal plan. Also, shares represented by certificates
            may not be redeemed by telephone. See "Redeeming Shares" for
            information on how to redeem your shares.

            NET ASSET VALUE

            Net asset value per share ("NAV") refers to the worth of one share.
            NAV is computed by adding the value of all portfolio holdings, plus
            other assets, deducting liabilities and then dividing the result by
            the number of shares outstanding.  The Fund's NAV will vary daily
            based on the market values of its investments.

            Fixed-income securities, including those to be purchased under firm
            commitment agreements (other than obligations having a maturity of
            60 days or less), are normally valued on the basis of quotes
            obtained from brokers and dealers or pricing services.  Short-term
            investments having a maturity of 60 days or less are valued at
            amortized cost, unless the Board of Trustees determines that such
            method is not appropriate under specific 

                                      20
<PAGE>
 
            circumstances. Assets for which there are no quotations available
            will be valued at fair value as determined by the Board of Trustees.

            The NAV is calculated at the close of the regular session of the New
            York Stock Exchange (normally 3:00 p.m. Central time).  The Fund is
            closed for business any day the New York Stock Exchange is closed
            and on the following holidays: Columbus Day, Martin Luther King's
            Birthday and Veterans Day.  All purchases of Fund shares will be
            confirmed and credited to your account in full and fractional
            shares.


WHEN YOUR ACCOUNT WILL BE CREDITED

BEFORE YOU BUY SHARES, PLEASE READ THE FOLLOWING INFORMATION TO MAKE SURE YOUR
INVESTMENT IS ACCEPTED AND CREDITED PROPERLY.

            Your purchase will be processed at the next offering price based on
            the net asset value next calculated after your order is received and
            accepted.  Such calculation is made at the close of regular session
            trading on the New York Stock Exchange, which is usually 3:00 p.m.
            Central time.  All your purchases must be made in U.S. dollars and
            checks must be drawn on U.S. banks.  No cash will be accepted.  The
            Fund reserves the right to suspend the offering of shares for a
            period of time or to reject any specific purchase order.  If your
            check does not clear, your purchase will be cancelled and you will
            be charged a $10 fee plus costs incurred by the Fund.  When you
            purchase by check, the Fund can hold payment on redemptions until
            they are reasonably satisfied that the investment is collected
            (normally up to 15 calendar days from the purchase date).  To avoid
            this collection period, you can wire federal funds from your bank,
            which may charge you a fee.      

            Certain financial institutions or broker-dealers which have entered
            into a sales agreement with the Distributor may enter confirmed
            purchase orders on behalf of customers by phone, with payment to
            follow within a number of days of the order as specified by the
            program. If payment is not received in the time specified, the
            financial institution could be liable for resulting fees or losses.
            State securities laws may require such firms to be licensed as
            securities dealers in order to sell shares of the Fund.


            EXCHANGING SHARES

YOU MAY EXCHANGE SHARES OF THE FUND FOR SHARES OF THE OTHER ARIEL MUTUAL FUNDS
AND FOR SHARES OF CERTAIN MONEY MARKET FUNDS.

            You may exchange your shares in the Fund for shares of the Fund's
            Institutional Class or for shares of the other Ariel Mutual Funds at
            no additional charge as long as your total investment in each class
            or Fund meets the minimum required for that class or Fund.      

            You may also exchange your shares in any Ariel Mutual Fund for
            shares of Cash Resource Money Market Fund, Cash Resource U.S.
            Government Money Market Fund or Cash Resource Tax-Exempt Money
            Market Fund at no additional charge as long as your total investment
            meets any minimum required. This exchange privilege is a convenient
            way to buy shares in a money market fund in order to respond to
            changes in your goals or in market conditions. These money market
            funds are no-load funds managed by Cambridge Investment Advisors,
            Inc.

                                      21
<PAGE>
 
            Before exchanging your shares into shares of the Fund's
            institutional class, shares of any other Ariel Mutual Fund or shares
            of Cash Resource Money Market Fund, Cash Resource U.S. Government
            Money Market Fund or Cash Resource Tax-Exempt Money Market Fund,
            read the applicable prospectus. To obtain a prospectus for any of
            these funds, just call 1-800-29-ARIEL (1-800-292-7435).      

BY MAIL
            To exchange your shares of the Fund into shares of one of the other
            Ariel Mutual Funds, just send a written request to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

            This request should include your name, account number, the name of
            the Fund you currently own, the name of the Ariel Mutual Fund you
            wish to exchange into and the dollar amount or number of shares you
            wish to exchange. Please remember that you cannot place any
            conditions on your request.

            To exchange your shares of the Fund into shares of Cash Resource
            Money Market Fund, Cash Resource U.S. Government Money Market Fund
            or Cash Resource Tax-Exempt Money Market Fund, complete and sign an
            application and mail it to the address set forth above.

BY TELEPHONE

            Unless you have elected not to have telephone transaction privileges
            by checking the appropriate box in your application, you may also
            make exchanges by calling 1-800-29-ARIEL (1-800-292-7435). Exchanges
            made over the phone may be made by any person, not just the
            shareholder of record. You may only exchange shares by telephone if
            the shares you are exchanging are not in certificate form. Certain
            other limitations and conditions apply to all telephone
            transactions.  Before using your telephone privilege, please read
            "Telephone Transactions."

            OTHER INFORMATION ABOUT EXCHANGING SHARES

            All accounts opened as a result of using the exchange privilege must
            be registered in the same name and taxpayer identification number as
            your existing account with the Ariel Mutual Funds.

            Because of the time needed to transfer money between funds, you may
            not exchange into and out of the same fund on the same or successive
            days; there must be at least one day between exchanges. You may
            exchange your shares of the Fund only for shares that have been
            registered for sale in your state.

            Remember that each exchange represents the sale of shares of one
            fund and the purchase of shares of another. Therefore, you could
            realize a taxable gain or loss on the transaction.

            The Fund reserves the right to terminate or modify the exchange
            privilege with at least 60 days' written notice. If your account is
            subject to backup withholding, you may not use the exchange
            privilege.

                                      22
<PAGE>
 
            Because excessive trading can hurt the Fund's performance and
            shareholders, the Fund also reserves the right to temporarily or
            permanently terminate, with or without advance notice, the exchange
            privilege of any investor who makes excessive use of the exchange
            privilege (e.g. more than five exchanges per calendar year). Your
            exchanges may be restricted or refused if the Fund receives or
            anticipates simultaneous orders affecting significant portions of
            the Fund's assets. In particular, a pattern of exchanges with a
            "market timer" strategy may be disruptive to the Fund.

            If you have any share certificates, you must include them with your
            exchange request. A signature guarantee is not required except in
            cases where shares are also redeemed at the same time for cash in an
            amount exceeding $25,000. For certificate delivery instructions see
            "Redeeming Shares--By Mail" and for signature guarantee instructions
            see "Signature Guarantees."

            TELEPHONE TRANSACTIONS

            If you have telephone transaction privileges, you may purchase,
            redeem, or exchange shares or wire funds by telephone as described
            in this prospectus. You automatically have telephone privileges
            unless you elect otherwise. These privileges, however, may not be
            available through certain dealers and financial institutions. The
            Fund, the Transfer Agent and their affiliates are not liable for
            acting in good faith on telephone instructions relating to your
            account, provided they follow reasonable procedures to determine
            that the telephone instructions are genuine. Such procedures will
            include a request for a personal identification number and tape
            recording of the instructions. You should verify the accuracy of
            telephone transactions immediately upon receipt of your confirmation
            statement.  Due to the need for signature guarantees, telephone
            redemptions in excess of $25,000 will not be accepted.

            During unusual market conditions, we may have difficulty in
            accepting telephone requests, in which case you should mail your
            request.

            The Fund reserves the right to terminate, suspend or modify
            telephone transaction privileges.

            SIGNATURE GUARANTEES

WE MAY REQUIRE SIGNATURE GUARANTEES.

            For our mutual protection, we may require a signature guarantee on
            certain transaction requests. A signature guarantee verifies the
            authenticity of your signature, and may be obtained from any bank,
            trust company, savings and loan association, credit union, broker-
            dealer firm or member of a domestic stock exchange. A signature
            guarantee cannot be provided by a notary public. If redemption
            proceeds are $25,000 or less and are to be paid or credited to an
            individual shareholder of record at the address of record, a
            signature guarantee is not required (unless there has been an
            address change within 60 days). All other redemption requests must
            have signatures guaranteed.

            SPECIAL SERVICES AND CHARGES

            The Fund pays for shareholder services but not for special services
            that are required by a few shareholders, such as a request for a
            historical transcript of an account. You may be required to pay a
            research fee for these special services.

                                      23
<PAGE>
 
            If you are purchasing shares of the Fund through a program of
            services offered by a broker-dealer or financial institution, you
            should read the program materials in conjunction with this
            prospectus.  Certain features may be modified in these programs, and
            administrative charges may be imposed by the broker-dealer or
            financial institution for the services rendered.


TAX-SAVING RETIREMENT PLANS

CONTACT THE ADVISER FOR COMPLETE INFORMATION KITS DISCUSSING THE PLANS AND THEIR
BENEFITS, PROVISIONS AND FEES.

            You may establish your new account under one of several tax-deferred
            plans. These plans let you invest for retirement and shelter your
            investment income from current taxes.

            . Individual Retirement Accounts (IRAs): available to anyone who has
            earned income. You may also be able to make investments in the name
            of your spouse, if your spouse has no earned income.

            . Qualified Profit-Sharing and Money-Purchase Plans (including
            401(k) Plans): available to self-employed people and their partners,
            or to corporations and their employees.

            . Simplified Employee Pension Plan (SEP-IRA): available to self-
            employed people and their partners, or to corporations. Salary
            reduction pension plans (SAR-SEP IRAs) are also available to
            employers with 25 or fewer employees.

            . 403(b)(7) Custodial Accounts: available to employees of most non-
            profit organizations and public schools and universities.

            REDEEMING SHARES

BY MAIL
            You may redeem shares from your account by sending a letter of
            instruction, your name, the name of the Fund and account number from
            which shares are redeemed, the number of shares or dollar amount and
            where you want your check to be sent. Simply send your written
            request to redeem your shares to our Transfer Agent as follows:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

            Certain shareholders, such as corporations, trusts and estates, may
            be required to submit additional documents. The letter of
            instruction must be signed by all required authorized signers. If
            you want your money to be wired to a bank not previously authorized
            or if you would like funds sent to a different address or another
            person, your letter must be signature guaranteed. Please remember
            that you cannot place any conditions on your request. If any share
            certificates were issued, they must be returned duly endorsed or
            accompanied by a separate stock assignment. See "Signature
            Guarantees."

BY TELEPHONE

            Unless you have elected not to have telephone transaction privileges
            by checking the box in your application, you may also redeem shares
            by calling 1-800-29-ARIEL (1-800-292-7435) and receive a check by
            mail. Remember, however, that the check can only be issued for up to
            $25,000, and only to the registered owner, and may only be sent 

                                      24
<PAGE>
 
            to the address of record, which must have been on file for at least
            60 days. Shares represented by certificates may not be redeemed by
            telephone.


BY WIRE
            Payment for your shares may also be made to you by wire if you have
            selected this option in your application and have named a commercial
            bank or savings institution with a routing number to which we can
            send your money.

            Once you have applied for wire redemption privileges, you or any
            other person can make such a request by calling 1-800-29-ARIEL (1-
            800-292-7435). You may also use your wire privilege by mailing a
            signed request that includes the name of the Fund, account number
            and amount you wish to have wired, by writing to:

               Ariel Mutual Funds
               P.O. Box 419121
               Kansas City, Missouri 64141-6121

            The proceeds will be sent only to the financial institution you have
            designated on your application. You may terminate the wire
            redemption privilege by notifying us in writing. A charge of $10 is
            imposed on wire redemptions. See the restrictions under "Telephone
            Transactions" as they also apply to wire redemptions.      

SYSTEMATIC CHECK REDEMPTIONS

            If you maintain an account with a balance of $10,000 or more, you
            may have regular monthly or quarterly redemption checks for a fixed
            amount sent to you simply by sending a letter with all the
            information, including the Fund name, your account number, the
            dollar amount ($100 minimum) and when you want the checks mailed to
            your address on the account. If you would like checks regularly
            mailed to another person or place, the signature on your letter must
            be guaranteed. See "Signature Guarantees."      

            OTHER INFORMATION ABOUT REDEMPTIONS

TO ENSURE ACCEPTANCE OF YOUR REDEMPTION REQUEST, PLEASE FOLLOW THE PROCEDURES
DESCRIBED HERE AND BELOW.

            Other than the $10 fee imposed on wire redemptions, there is no
            charge for redeeming your shares. If, however, you redeem shares
            through certain dealers not having selling agreements with respect
            to the Fund your broker may charge a fee when you redeem your
            shares.

            Once your shares are redeemed, the proceeds will normally be sent to
            you on the next business day. However, if making immediate payment
            could adversely affect the Fund, it may take up to seven calendar
            days. When the New York Stock Exchange is closed (or when trading is
            restricted) for any reason other than its customary weekend or
            holiday closing, or under any emergency circumstances as determined
            by the Securities and Exchange Commission, redemptions may be
            suspended or payment dates postponed.

            You may redeem all or a portion of your shares on any business day
            during which the New York Stock Exchange is open for business except
            the following holidays: Columbus Day, Martin Luther King's Birthday
            and Veterans' Day.  Your shares will be redeemed at the net asset
            value next calculated after your redemption request is received by
            the Transfer Agent in proper form. Redemptions made after the New
            York Stock Exchange has closed will be made at the next day's net
            asset value. Remember that, if you redeem shortly after purchasing
            shares, the Fund may hold payment on the redemption of your shares
            until it is 

                                      25
<PAGE>
 
            reasonably satisfied that payments made by check have been collected
            (normally up to 15 calendar days after investment).


MINIMUM ACCOUNT BALANCE IS $1,000.

            Please maintain a balance in your Investor Class account of at least
            $1,000. If, due to redemptions, the value of your account in the
            Fund falls below $1,000, or you fail to invest at least $1,000, the
            account may be closed and the proceeds mailed to you at your address
            of record. You will be given 30 days' notice that your account will
            be closed unless you make an additional investment to increase your
            account balance to the $1,000 minimum.      

            REDEMPTIONS IN KIND

            If conditions arise that would make it undesirable for the Fund to
            pay for all redemptions in cash, the Fund may authorize payment to
            be made in marketable portfolio securities.  However, the Fund has
            obligated itself under the Investment Company Act of 1940 to redeem
            for cash all shares of the Fund presented for redemption by any one
            shareholder in any 90-day period up to the lesser of $250,000 or 1%
            of the Fund's net assets.  Securities delivered in payment of
            redemptions would be valued at the same value assigned to them in
            computing the Fund's net asset value per share.  Shareholders
            receiving such securities may incur brokerage costs or be subject to
            dealer markdowns when these securities are sold.

            DIVIDENDS, CAPITAL GAINS AND TAXES

EACH YEAR, THE FUND DISTRIBUTES SUBSTANTIALLY ALL OF ITS NET INVESTMENT INCOME
AND CAPITAL GAINS TO SHAREHOLDERS.

            The Fund intends to qualify as a regulated investment company under
            Subchapter M of the Internal Revenue Code, as amended (the "Code").
            As such, the Fund generally will not pay Federal income tax on the
            income and gains it pays as dividends to its shareholders.  In order
            to avoid a 4% Federal excise tax, the Fund intends to distribute
            each year substantially all of its net income and gains.

            Dividends from net investment income are declared and paid
            quarterly. Net investment income consists of the interest income,
            net short-term capital gains, if any, and dividends declared and
            received on investments, less expenses.  Distributions of net short-
            term capital gains (treated as dividends for tax purposes) and net
            long-term capital gains, if any, are normally declared and paid by
            the Fund once a year.

            During its initial operations, the Fund may be a personal holding
            company ("PHC") under the Code due to substantial ownership of the
            Fund's shares by a few shareholders.  In that event, the Fund
            intends to distribute all its PHC income so that there is no PHC tax
            imposed on the Fund.


DIVIDEND AND DISTRIBUTION PAYMENT OPTIONS

            Dividends and any distributions from the Fund are automatically
            reinvested in the Fund at net asset value, unless you elect to have
            the dividends of $10 or more paid in cash. New shares will be
            purchased at net asset value on the reinvestment date, which is
            generally up to three days prior to the payment date. You must
            notify the Fund in writing prior to the record date to change your
            payment options. If you elect to have dividends and/or distributions
            paid in cash, and the U.S. Postal Service cannot deliver the check,
            or if it

                                      26
<PAGE>
 
            remains uncashed for six months, it, as well as future dividends and
            distributions, will be reinvested in additional shares.


TAXES ON DISTRIBUTIONS

            Distributions are subject to federal income tax, and may also be
            subject to state or local taxes.  Distributions are taxable when
            they are paid, whether they are received in cash, or reinvested.
            However, distributions declared in December and paid in January are
            taxable as if they were paid on December 31.  For federal tax
            purposes, the Fund's income and short-term capital gain
            distributions are taxed as dividends; long-term capital gain
            distributions are taxed as long-term capital gains.  Some dividends
            may be exempt from state or local income tax as income derived from
            U.S. Government Securities.  You should consult your tax adviser on
            the taxability of your distributions.

"BUYING A DIVIDEND"

            At the time of purchase, the share price of the Fund may reflect
            undistributed income, capital gains or unrealized appreciation of
            securities. Any income or capital gains from these amounts which are
            later distributed to you are fully taxable. On the record date of a
            distribution, the Fund's share value is reduced by the amount of the
            distribution. If you buy shares just before the record date ("buying
            a dividend") you will pay the full price for the shares and then
            receive a portion of this price back as a taxable distribution.

YOU MAY REALIZE A CAPITAL GAIN OR LOSS WHEN YOU SELL OR EXCHANGE SHARES.

            If you sell or exchange your shares you will have a short or long-
            term capital gain or loss, depending on how long you owned the
            shares which were sold. In January, you will be sent a form
            indicating the proceeds from all sales, including exchanges. You
            should keep your annual year-end account statements to determine the
            cost (basis) of the shares to report on your tax returns.

            If we do not have your correct Social Security or Corporate Tax
            Identification Number ("TIN") and a signed certified application or
            Form W-9, Federal law requires the Fund to withhold 31% of your
            dividends and certain redemptions. In addition, you may be subject
            to a fine. You will also be prohibited from opening another account
            by exchange. If this TIN information is not received within 60 days
            after your account is established, your account may be redeemed at
            the current NAV on the date of redemption. The Fund reserves the
            right to reject any new account or any purchase order for failure to
            supply a certified TIN.

                                      27
<PAGE>
 
                                 CERTAIN SHAREHOLDERS OF THE FUND      
    
            The following table sets forth, as of _________, 1995, the name and
            holdings of each person known by the Fund to be a record owner of
            more than 5% of its outstanding shares.  As of such date, there were
            ____ Institutional shares, and _____ Investor shares, outstanding.
     
    
<TABLE>
<CAPTION>
 
% OF OUTSTANDING
NAME AND ADDRESS                  OWNED  SHARES
- --------------------------------  -----  -------
<S>                               <C>    <C>
 
Institutional Class
- --------------------------------
Ariel Capital Management, Inc.    ____   ___%
307 N. Michigan Avenue
Chicago, IL  60601
 
Investor Class
- --------------------------------
Ariel Capital Management, Inc.    ____      100%
307 N. Michigan Avenue
Chicago, IL  60601
</TABLE>      

            TOTAL RETURN, YIELD AND OTHER PERFORMANCE INFORMATION

THE FUND MAY ADVERTISE TOTAL RETURN AND YIELD, WHICH ARE BASED ON HISTORICAL
RESULTS AND ARE NOT INTENDED TO INDICATE FUTURE PERFORMANCE.

            A total return is a change in the value of an investment during the
            stated period, assuming all dividends and capital gain distributions
            are reinvested. A cumulative total return reflects performance over
            a stated period of time. An average annual total return is the
            hypothetical annual compounded return that would have produced the
            same cumulative total return if the performance had been constant
            over the entire period. Because average annual returns tend to
            smooth out variations in the returns, you should recognize that they
            are not the same as actual year-by-year results. In addition to
            advertising average annual returns for the required standard
            periods, such returns may be quoted for other periods, including
            periods of less than one year.

            Quotations of yield for the Fund will be based on the investment
            income per share (as defined by the Securities and Exchange
            Commission) during a particular 30-day (or one-month) period
            (including dividends and interest), less expenses accrued during the
            period ("net investment income"), and will be computed by dividing
            net investment income by the maximum public offering price per share
            on the last day of the period.

            The Fund also may provide current distribution information to its
            shareholders in shareholder reports or other shareholder
            communications or in certain types of sales literature provided to
            prospective investors.  Current distribution information for the
            Fund will be based on distributions for a specified period (i.e.,
                                                                        ---- 
            total dividends from net investment income), divided by the net
            asset value per share on the last day of the period and annualized.
            The rate of current distributions does not reflect deductions for
            unrealized losses from transactions in derivative instruments such
            as futures, which may reduce total return.  Current distribution
            rates differ from standardized yield rates in that they represent
            what the Fund has declared and paid to shareholders as of the end of
            a specified period rather than the Fund's actual net investment
            income for that period.

                                      28
<PAGE>
 
            Performance information for the Fund may also be compared to various
            unmanaged indices, such as the Lehman Brothers Aggregate Bond Index,
            the Lehman Brothers Government/Corporate Index, the Salomon Brothers
            Broad Investment-Grade Bond Index, indices prepared by Lipper
            Analytical Services, and other entities or organizations which track
            the performance of investment companies or investment advisers.
            Unmanaged indices (i.e., other than Lipper) generally do not reflect
                               ----                                             
            deductions for administrative and management costs and expenses.
            Any performance information should be considered in light of the
            Fund's investment objectives and policies, characteristics and
            quality of the portfolio and the market conditions during the time
            period indicated, and should not be considered to be representative
            of what may be achieved in the future.  For a description of the
            methods used to determine yield and total return for the Fund, see
            the Statement of Additional Information.

            From time to time, the Fund or its affiliates may provide
            information including, but not limited to, general economic
            conditions, comparative performance data and rankings with respect
            to comparable investments for the same period and for unmanaged
            market indices described in the Statement of Additional Information.

                                      29
<PAGE>
 
ADVISER,
SERVICES ADMINISTRATOR
Ariel Capital Management, Inc.
307 North Michigan Avenue
Chicago, Illinois 60601
1-800-29-ARIEL (1-800-292-7435) fax (312) 726-7473

SUB-ADVISER
Lincoln Capital Management Company
200 South Wacker Drive
Chicago, IL  60606

PRINCIPAL UNDERWRITER
Ariel Distributors, Inc.
307 North Michigan Avenue
Chicago, Illinois  60601

INDEPENDENT AUDITORS
Ernst & Young LLP
233 South Wacker Drive
Chicago, Illinois 60606

TRANSFER AGENT AND CUSTODIAN
Investors Fiduciary Trust Company
127 West 10th Street
Kansas City, Missouri 64105

LEGAL COUNSEL
D'Ancona & Pflaum
30 North LaSalle Street
Chicago, Illinois 60602

BOARD OF TRUSTEES

Mario L. Baeza, Esq.
President, Wasserstein Perella International; Managing Director and Chief
Executive Officer, Americas Division, Wasserstein Perella & Co., Inc.

William C. Dietrich, CPA
Chief Financial Officer, Home Shopping Alternatives, Inc.

Royce N. Flippin, Jr., MBA
President, Flippin Associates; formerly Director of Program Advancement,
Massachusetts Institute of Technology

John G. Guffey, Jr.
Chair, Calvert Social Investment Foundation
Treasurer and Director, Silby, Guffey and Co., Inc.

Mellody L. Hobson
Senior Vice President, Director of Marketing, Ariel Capital Management, Inc.

Christopher G. Kennedy, MBA
Executive Vice President and Director,
Merchandise Mart Properties, Inc.

Eric T. McKissack, CFA, MBA
Vice Chairman and Co-Chief Investment Officer,
Ariel Capital Management, Inc.

Bert N. Mitchell, MBA, CPA
Founder, Chairman and Chief Executive Officer, Mitchell/Titus & Co.

                                      30
<PAGE>
 
                             ARIEL INVESTMENT TRUST
                      STATEMENT OF ADDITIONAL INFORMATION

                                __________, 1995

                          FOR ARIEL PREMIER BOND FUND
                           307 North Michigan Avenue
                                   Suite 500
                            Chicago, Illinois 60601
                        1-800-29-ARIEL (1-800-292-7435)


Ariel Premier Bond Fund (the "Fund") is a series of Ariel Growth Fund, doing
business as Ariel Investment Trust (the "Trust").


This Statement of Additional Information is not a prospectus but provides
information that should be read in conjunction with the Fund's Prospectus dated
__________, 1995 and any supplement thereto, which may be obtained free of
charge by writing or calling the Fund.
<PAGE>
 
                               TABLE OF CONTENTS
<TABLE>     
<S>                                                           <C>
FUNDAMENTAL INVESTMENT RESTRICTIONS.........................   3
 
NON-FUNDAMENTAL INVESTMENT RESTRICTIONS.....................   4
 
ADDITIONAL INFORMATION ABOUT
INVESTMENT TECHNIQUES.......................................   5
 
IN KIND PURCHASES OF CLASS A SHARES OF THE FUND.............  11
 
SPECIAL TAX MATTERS.........................................  12
 
INVESTMENT ADVISER, SUB-ADVISER AND SERVICES ADMINISTRATOR..  12
 
METHOD OF DISTRIBUTION OF THE CLASS B SHARES................  13
 
TRANSFER AGENT AND CUSTODIAN................................  14
 
PORTFOLIO TRANSACTIONS......................................  14
 
INDEPENDENT AUDITORS........................................  14
 
GENERAL INFORMATION.........................................  14
 
TRUSTEES AND OFFICERS.......................................  15
 
COMPENSATION SCHEDULE.......................................  16
 
CALCULATION OF PERFORMANCE DATA.............................  16
 
FINANCIAL STATEMENTS........................................  18
 
APPENDIX A..................................................  22
 
APPENDIX B..................................................  23
 
</TABLE>
     

                                       2
<PAGE>
 
                      FUNDAMENTAL INVESTMENT RESTRICTIONS

The investment restrictions set forth below and the Fund's investment objective
are fundamental policies and may not be changed without the approval of the
holders of a majority of the outstanding shares of the Fund. As defined in the
Investment Company Act of 1940, this means the lesser of the vote of (a) 67% of
the shares of the Fund at a meeting where more than 50% of the outstanding
shares are present in person or by proxy, or (b) more than 50% of the
outstanding shares of the Fund.

      (1) COMMODITIES.  The Fund may not purchase or sell commodities or
commodity contracts except contracts in respect to financial futures.

      (2) REAL ESTATE.  The Fund may not purchase real estate or real estate
mortgages, but may purchase securities backed by real estate or interests
therein (including mortgage interests) and securities of companies, including
real estate investment trusts, holding real estate or interests (including
mortgage interests) therein.  (This does not prevent the Fund from owning and
liquidating real estate or real estate interests incident to a default on
portfolio securities.)

     (3)  DIVERSIFICATION OF FUND INVESTMENTS.

          (a)  FUND ASSETS.  With respect to 75% of the value of its total
     assets, the Fund may not buy the securities of any issuer if more than 5%
     of the value of Fund's total assets would then be invested in that issuer.
     Securities issued or guaranteed by the U.S. government or its agencies or
     instrumentalities and repurchase agreements involving such securities
     ("U.S. Government Securities") are not subject to this limitation.

          (b)  SECURITIES OF ISSUERS.  With respect to 75% of the value of its
     total assets, the Fund may not purchase the securities of any issuer if
     after such purchase the Fund would then own more than 10% of such issuer's
     voting securities.  U.S. Government Securities are not subject to this
     limitation.

     (4)  INDUSTRY CONCENTRATION.  The Fund may not purchase the securities of
companies in any one industry if 25% or more of the value of the Fund's total
assets would then be invested in companies having their principal business
activity in the same industry.  U.S. Government Securities are not subject to
this limitation.

     (5)  SENIOR SECURITIES; BORROWING. The Fund may not issue senior securities
except as permitted under the Investment Company Act of 1940. The Fund may not
pledge or hypothecate any of its assets, except in connection with permitted
borrowing.

     (6)  UNDERWRITING.  The Fund does not engage in the underwriting of
securities.  (This does not preclude it from selling restricted securities in
its portfolio.)

     (7)  LENDING MONEY OR SECURITIES.  The Fund may not lend money, except that
it may purchase and hold debt securities publicly distributed or traded or
privately placed and may enter into repurchase agreements.  The Fund will not
lend securities if such a loan would cause more than one-third of the Fund's net
assets to then be subject to be such loans.

     (8)  OFFICER AND TRUSTEES.  The Fund may not purchase from or sell to any
of the Trust's officers or trustees, or firms of which any of them are members,
any securities (other than capital stock of the Fund), but such persons or firms
may act as brokers for the Fund for customary commissions.

                                       3
<PAGE>
 
                    NON-FUNDAMENTAL INVESTMENT RESTRICTIONS

These policies may be changed by the Board of Trustees without shareholder
approval.


     (1) MARGIN.  The Fund may not purchase any securities on margin, except
that the Fund may (a) obtain such short-term credit as may be necessary for the
clearance of purchases and sales of portfolio securities; or (b) make margin
deposits in connection with transactions in futures and forward contracts.
    
     (2) BORROWING.  The Fund may not purchase securities when money borrowed
exceeds 5% of its total assets.      

     (3) FUTURES.  The Fund may not purchase a futures contract, except in
respect to interest rates and then only if, with respect to positions which do
not represent bona fide hedging, the aggregate initial margin for  such
positions would not exceed 5% of the Fund's total assets.

     (4)  ILLIQUID SECURITIES.  The Fund may not purchase illiquid securities
(including restricted securities which are illiquid and repurchase agreements
maturing in more than seven days) if, as a result, more than 15% of its net
assets would be invested in such securities;

     (5) OWNERSHIP OF PORTFOLIO SECURITIES BY OFFICERS AND DIRECTORS.  The Fund
may not purchase or retain the securities of any issuer if any officer or
trustee of the Fund or its investment adviser owns beneficially more than  1/2
of 1% of the securities of such issuer and if together such individuals own more
than 5% of the securities of such issuer.

     (6) LENDING PORTFOLIO SECURITIES.  The Fund may not loan portfolio
securities (except as collateral in connection with permitted borrowing).

     (7) OIL AND GAS PROGRAMS.  The Fund may not invest in interests in oil,
gas, or other mineral exploration or development programs, although it may
invest in securities of issuers which invest in or sponsor such programs.

     (8) INVESTMENT COMPANIES.  The Fund may not purchase the securities of
other investment companies, except as they may be acquired as part of a merger,
consolidation or acquisition of assets.

     (9) UNSEASONED ISSUERS.  The Fund may not purchase the securities of
companies which, together with its predecessors, have a record of less than
three years' continuous operation if, as a result, more than 5% of the value of
its assets would be invested in securities of such companies.  U.S. Government
Securities and issuers of asset-backed securities are not subject to this
limitation.

                                       4
<PAGE>
 
                          ADDITIONAL INFORMATION ABOUT
                             INVESTMENT TECHNIQUES

LOANS OF PORTFOLIO SECURITIES

     The fundamental investment restrictions provide that the Fund may make
secured loans of portfolio securities in order to realize additional income,
provided that the Fund will not lend securities if such a loan would cause more
than one-third of the total value of its net assets to then be subject to such
loans.  However, as a matter of non-fundamental policy, the Fund does not
currently intend to make such loans.  This policy may be changed by the Board of
Trustees should they determine that such loans would benefit the Fund.


REPURCHASE AGREEMENTS

     The Fund may purchase securities subject to repurchase agreements which are
transactions in which the Fund purchases a security and simultaneously commits
to resell that security to the seller at a mutually agreed upon time and price.
The seller's obligation is secured by the underlying security. The repurchase
price reflects the initial purchase price plus an agreed upon market rate of
interest. While the underlying security may bear a maturity in excess of one
year, the term of the repurchase agreement is always less than one year.

     The Fund will engage in repurchase agreements with recognized securities
dealers and banks determined to present minimal credit risk by the Sub-Adviser.
In addition, the Fund will engage in repurchase agreements reasonably designed
to fully secure the seller's obligation, during the term of the agreement, to
repurchase the underlying security and the Fund will monitor the market value of
the underlying security during the term of the agreement. If the value of the
underlying security declines and is not at least equal to the repurchase price
due to the Fund pursuant to the agreement, the Fund will require the seller to
pledge additional securities or cash to secure the seller's obligations pursuant
to the agreement. If the seller defaults on its obligation to repurchase and the
value of the underlying security declines, the Fund may incur a loss and may
incur expenses in selling the underlying security.

MORTGAGE DOLLAR ROLLS

     The Fund may enter into "mortgage dollar rolls," which are transactions in
which the Fund sells a mortgage-related security (such as a GNMA security) to a
dealer and simultaneously agrees to repurchase a similar security (but not same
security) in the future at a pre-determined price.  A "dollar roll" can be
viewed as a collateralized borrowing in which the Fund pledges a mortgage-
related security to a dealer to obtain cash.  The dealer with which the Fund
enters into a dollar roll transaction is not obliged to return the same
securities as those originally sold by the Fund, but only securities which are
"substantially identical."  To be considered "substantially identical," the
securities returned to the Fund generally must: (1) be collateralized by the
same types of underlying mortgages; (2) be issued by the same agency and be part
of the same program; (3) have a similar original stated maturity; (4) have
identical net coupon rates; (5) have similar market yields (and therefore
price); and (6) satisfy "good delivery" requirements, meaning that the aggregate
principal amounts of the securities delivered and received back must be within
2.5% of the initial amount delivered.

     The Fund's obligations under a dollar roll agreement must be covered by
cash or high quality debt securities equal in value to the securities subject to
repurchase by the Fund, maintained in a segregated account.  To the extent that
the Fund collateralizes its obligations under a dollar roll agreement, the asset
coverage requirements of the Investment Company Act of 1940, described below,
will not apply to such transactions.

     The Fund may be released from its obligations under a dollar roll agreement
by selling its position to another party at any time prior to the settlement
date. The Fund may realize a gain or loss on such a sale. If the 

                                       5
<PAGE>
 
Fund realizes a gain, it will not be able to collect its profit until the
original settlement date of the agreement. Because dollar roll transactions may
be for terms ranging between one and six months, the amount of any such gain may
be deemed "illiquid" and subject to the Fund's overall limitations on
investments in illiquid securities.

     The Investment Company Act of 1940 requires the Fund to maintain continuous
asset coverage (total assets including borrowings, less liabilities exclusive of
borrowings) of 300% of the amount borrowed.  If the 300% asset coverage should
decline as a result of market fluctuations or other reasons, the Fund may be
required to sell some of its portfolio holdings within three days to reduce the
debt and restore the 300% asset coverage, even though it may be disadvantageous
from an investment standpoint to sell securities at that time.

TRANSACTIONS IN FUTURES

     As described in the Prospectus, the Fund may purchase and sell interest
rate futures contracts ("futures contracts") for the purpose of hedging its
portfolio of fixed-income securities against the adverse effects of anticipated
movements in interest rates or as an efficient means of regulating the Fund's
exposure to the bond market.  The Fund may trade futures contracts on any
interest rate related instrument.  The Fund is subject to the tax requirement
that less than 30% of its gross income be derived from the sale or other
disposition of stocks, securities and certain options, futures or forward
contracts held for less than three months.  This requirement may limit the
Fund's ability to engage in the hedging transactions and strategies described
below.  The Fund is also subject to certain requirements of the Commodity
Futures Trading Commission ("CFTC") which are described below.  See the Appendix
for a more complete description of futures transactions.

     The Fund will engage in transactions in futures contracts only for bona
fide hedging, yield enhancement and risk management purposes, in each case in
accordance with the rules and regulations of the CFTC.  The Fund will not engage
in a futures transaction if it would cause the aggregate of initial margin
deposits which do not represent bona fide hedging to exceed 5% of the value of
total assets.  The successful use of futures for hedging purposes depends on the
Sub-Adviser's ability to forecast interest rate movements.  Should interest
rates move in an unexpected manner, the Fund may not achieve the anticipated
benefits of the futures contracts and thus may be in a worse position than if
such strategies had not been used.

     The Fund may also use futures transactions to lengthen or shorten the
duration of the Fund's portfolio.  The Sub-Adviser can lengthen the duration of
the portfolio by purchasing futures and can shorten the duration by selling
futures.  Duration measures the interest rate sensitivity of the Fund's
portfolio.  A longer duration means more interest rate sensitivity and therefore
greater gains or losses when interest rates change.


RISK FACTORS IN TRANSACTIONS IN FUTURES

     The trading of futures contracts for hedging and duration management
purposes involves the risk of imperfect correlation between movements in the
price of the futures contracts and the price of the security being hedged.  The
hedge will not be fully effective where there is imperfect correlation between
the movements in the two financial instruments.  For example, if the price of
the futures contract moves more than the price of the hedged security, the Fund
would experience either a loss or gain on the future which is not completely
offset by movements in the price of the hedged securities.  To compensate for
imperfect correlations, the Fund may purchase or sell futures contracts in a
greater dollar amount than the hedged securities if the volatility of the hedged
securities is historically greater than the volatility of the futures contracts.
Conversely, the Fund may purchase or sell fewer futures contracts if the
volatility of the price of the hedged securities is historically less than that
of the futures contracts, although such transactions will in any event be
entered into solely for hedging purposes.  To the extent interest rates remain
stable during the period in which a futures contract is held by the Fund or such
rates move in a direction opposite to that anticipated, the Fund may realize a
loss on the hedging transaction which is not fully or partially offset by an
increase in the value of portfolio securities. As a result, the Fund's total
return for such period may be less than if it had not engaged in the hedging
transaction.

                                       6
<PAGE>
 
     The Fund may also purchase futures contracts to hedge against a possible
increase in the price of securities before the Fund is able to invest its cash
in fixed-income securities.  In such instances, it is possible that the market
may instead decline.  If the Fund does not then invest in such securities
because of concern as to possible further market decline or for other reasons,
the Fund may realize a loss on the futures contract that is not offset by a
reduction in the price of securities purchased.

     Because of low initial margin deposits made upon the opening of a futures
position, futures transactions involve substantial leverage.  As a result,
relatively small movements in the price of the futures contract can result in
substantial unrealized gains or losses.  When the Fund engages in the purchase
and sale of financial futures contracts for hedging purposes, however, any
losses incurred in connection therewith should, if the hedging strategy is
successful, be offset in whole or in part by increases in the value of
securities held by the Fund or decreases in the price of securities the Fund
intends to acquire.  In addition, the Fund will set aside cash or cash
equivalents equal, on a daily basis, to its obligations under such contracts in
order to mitigate the effects of such coverage.

     The anticipated offsetting movements between the price of the futures
contracts and the hedged security may be distorted due to differences in the
nature of the markets, such as differences in initial and variation margin
requirements, the liquidity of such markets and the participation of speculators
in such markets.

     The trading of futures contracts is also subject to certain market risks,
such as trading halts, suspensions, exchange or clearing house equipment
failures, government intervention, insolvency of a brokerage firm or clearing
corporation or other disruptions of normal trading activity, which could at
times make it difficult or impossible to liquidate existing positions.


MORTGAGE-RELATED AND OTHER ASSET-BACKED SECURITIES

     Mortgage-related securities (often referred to as "mortgage-backed"
securities) are interests in pools of residential or commercial mortgage loans,
including mortgage loans made by savings and loan institutions, mortgage
bankers, commercial banks and others.  Pools of mortgage loans are assembled as
securities for sale to investors by various governmental, government-related and
private organizations .  The Fund may also invest in debt securities which are
secured with collateral consisting of mortgage-related securities, and other
types of mortgage-related securities.

     Mortgage Pass-Through Securities.  Interests in pools of mortgage-related
securities differ from other forms of debt securities, which normally provide
for periodic payment of interest in fixed amounts with principal payments at
maturity or specified call dates.  Instead, these securities provide a monthly
payment which consists of both interest and principal payments.  In effect,
these payments are a "pass-through" of the monthly payments made by the
individual borrowers on their residential or commercial mortgage loans, net of
any fees paid to the issuer or guarantor of such securities.  Additional
payments are caused by repayments of principal resulting from the sale of the
underlying property, refinancing or foreclosure, net of fees or costs which may
be incurred.  Some mortgage-related securities (such as securities issued by the
Government National Mortgage Association ("GNMA")) are described as "modified
pass-through."  These securities entitle the holder to receive all interest and
principal payments owed on the mortgage pool, net of certain fees, at the
scheduled payment dates regardless of whether or not the mortgagor actually
makes the payment.

     The principal governmental guarantor of mortgage-related securities is
GNMA. GNMA is a wholly owned United States Government corporation within the
Department of Housing and Urban Development. GNMA is authorized to guarantee,
with the full faith and credit of the United States Government, the timely
payment of principal and interest on securities issued by institutions approved
by GNMA (such as savings and loan institutions, commercial banks and mortgage
bankers) backed by pools of FHA-insured or VA-guaranteed mortgages.

                                       7
<PAGE>
 
     Government-related guarantors (i.e., not backed by the full faith and
                                    ----                                  
credit of the United States Government) include the Federal National Mortgage
Association ("FNMA") and the Federal Home Loan Mortgage Corporation ("FHLMC").
FNMA is a government-sponsored corporation owned entirely by private
stockholders.  It is subject to general regulation by the Secretary of Housing
and Urban Development.  FNMA purchases conventional (i.e., not insured or
                                                     ----                
guaranteed by any government agency) residential mortgages from a list of
approved seller/servicers which include state and federally chartered savings
and loan associations, mutual savings banks, commercial banks and credit unions
and mortgage bankers.  Pass-through securities issued by FNMA are guaranteed as
to timely payment of principal and interest by FNMA but are not backed by the
full faith and credit of the United States Government.

     FHLMC was created by Congress in 1970 for the purpose of increasing the
availability of mortgage credit for residential housing.  It is a government-
sponsored corporation formerly owned by the twelve Federal Home Loan Banks and
now owned entirely by private stockholders.  FHLMC issues Participation
Certificates ("PCs") which represent interests in conventional mortgages from
FHLMC'S national portfolio.  FHLMC guarantees the timely payment of interest and
ultimate collection of principal, but PCs are not backed by the full faith and
credit of the United States Government.

     Commercial banks, savings and loan institutions, private mortgage insurance
companies, mortgage bankers and other secondary market issuers also create pass-
through pools of conventional residential mortgage loans.  Such issuers may, in
addition, be the originators and/or servicers of the underlying mortgage loans
as well as the guarantors of the mortgage-related securities.  Pools created by
such non-governmental issuers generally offer a higher rate of interest than
government and government-related pools because there are not direct or indirect
government or agency guarantees of payments in the former pools.  However,
timely payment of interest and principal of these pools may be supported by
various forms of insurance or guarantees, including individual loan, title, pool
and hazard insurance and letters of credit.  The insurance and guarantees are
issued by governmental entities, private insurers and the mortgage poolers.
Such insurance and guarantees and the creditworthiness of the issuers thereof
will be considered in determining whether a mortgage-related security meets the
Fund's investment quality standards.  There can be no assurance that the private
insurers or guarantors can meet their obligations under the insurance policies
or guarantee arrangements.  The Fund currently does not intend to purchase pass-
through securities that are not issued or guaranteed by an agency or
instrumentality of the U.S. Government.

     Mortgage-backed securities that are issued or guaranteed by the U.S.
Government, its agencies or instrumentalities, are not subject to the Fund's
industry concentration restrictions, set forth under "Fundamental Investment
Restrictions," by virtue of the exclusion from that test available to all U.S.
Government Securities.  In case of privately issued mortgage-related securities,
the Fund takes the position that mortgage-related securities do not represent
interests in any particular "industry" or group of industries.  The assets
underlying such securities may be represented by a portfolio of first lien
residential mortgages (including both whole mortgage loans and mortgage
participation interests) or portfolios of mortgage pass-through securities
issued or guaranteed by GNMA, FNMA or FHLMC.  Mortgage loans underlying a
mortgage-related security may in turn be insured or guaranteed by the Federal
Housing Administration or the Department of Veterans Affairs.

     Collateralized Mortgage Obligations (CMOs).  A CMO is a hybrid between a
mortgage-backed bond and a mortgage pass-through security.  Similar to a bond,
interest and prepaid principal are paid, in most cases, semiannually. CMOs may
be collateralized by whole mortgage loans, but are more typically collateralized
by portfolios of mortgage pass-through securities guaranteed by GNMA, FHLMC, or
FNMA, and their income streams.

     CMOs are structured into multiple classes, each bearing a different stated
maturity.  Actual maturity and average life will depend upon the prepayment
experience of the collateral.  CMOs can provide for a modified form of call
protection through a de facto breakdown of the underlying pool of mortgages
                     --------                                              
according to how quickly the loans are repaid.  Monthly payment of principal
received from the pool of underlying mortgages, including prepayments, is first
returned to investors holding the shortest maturity class.  Investors holding
the longer maturity

                                       8
<PAGE>
 
classes receive principal only after the first class has been retired. An
investor is partially guarded against a sooner than desired return of principal
because of the sequential payments.

     In a typical CMO transaction, a corporation ("issuer") issues multiple
series (e.g., A, B, C, Z) of CMO bonds ("Bonds").  Proceeds of the Bond offering
        ----                                                                    
are used to purchase mortgages or mortgage pass-through certificates
("Collateral").  The Collateral is pledged to a third party trustee as security
for the Bonds.  Principal and interest payments from the Collateral are used to
pay principal on the Bonds in the order A, B, C, Z.  The Series A, B and C Bonds
all bear current interest.  Interest on the Series Z Bond is accrued and added
to principal and a like amount is paid as principal on the Series A, B or C Bond
currently being paid off.  When the Series A, B and C Bonds are paid in full,
interest and principal on the Series Z Bond begins to be paid currently.  With
some CMOs, the issuer serves as a conduit to allow loan originators (primarily
builders or savings and loan associations) to borrow against their loan
portfolios.

     FHLMC Collateralized Mortgage Obligations.  FHLMC CMOs are debt obligations
of FHLMC issued in multiple classes having different maturity dates which are
secured by the pledge of a pool of conventional mortgage loans purchased by
FHLMC.  Unlike FHLMC Participation Certificates, payments of principal and
interest on the CMOs are made semiannually, as opposed to monthly.  The amount
of principal payable on each semiannual payment date is determined in accordance
with FHLMC's mandatory sinking fund schedule, which, in turn, is equal to
approximately 100% of FHA prepayment experience applied to the mortgage
collateral pool.  All sinking fund payments in the CMOs are allocated to the
retirement of the individual classes of bonds in the order of their stated
maturities.  Payment of principal on the mortgage loans in the collateral pool
in excess of the amount of FHLMC's minimum sinking fund obligation for any
payment date are paid to the holders of the CMOs as additional sinking fund
payments.  This "pass-through" of prepayments has the effect of retiring most
CMO classes prior to their stated final maturity.

     If collection of principal (including prepayments) on the mortgage loans
during any semiannual payment period is not sufficient to meet FHLMC'S minimum
sinking fund obligation on the next sinking fund payment date, FHLMC agrees to
make up the deficiency from its general funds.

     Criteria for the mortgage loans in the pool backing the FHLMC CMOs are
identical to those of FHLMC PCs.  FHLMC has the right to substitute collateral
in the event of delinquencies and/or defaults.

     Other Mortgage-Related Securities.  Other mortgage-related securities
include securities other than those described above that directly or indirectly
represent a participation in, or are secured by and payable from, mortgage loans
on real property, including stripped mortgage-backed securities.  Other
mortgage-related securities may be equity or debt securities issued by agencies
or instrumentalities of the U.S. Government or by private originators of, or
investors in, mortgage loans, including savings and loan associations,
homebuilders, mortgage banks, commercial banks, investment banks, partnerships,
trusts and special purpose entities of the foregoing.

     Stripped Mortgage-Backed Securities. Stripped mortgage-backed securities
("SMBS") are derivative multi-class mortgage securities. SMBS may be issued by
agencies or instrumentalities of the U.S. Government, or by private originators
of, or investors in, mortgage loans, including savings and loan associations,
mortgage banks, commercial banks, investment banks and special purpose entities
of the foregoing.

     SMBS are usually structured with two classes that receive different
proportions of the interest and principal distributions on a pool of mortgage
assets.  A common type of SMBS will have one class receiving some of the
interest and most of the principal from the mortgage assets, while the other
class will receive most of the interest and remainder of the principal.  In the
most extreme case, one class will receive all of the interest (the IO class),
while the other class will receive all of the principal (the principal-only or
"PO" class).  The yield to maturity on SMBS is extremely sensitive to the rate
of principal payments (including prepayments) on the related underlying mortgage
assets, and a change in the rate of principal payments may have a material
adverse effect on the Fund's 

                                       9
<PAGE>
 
yield to maturity from these securities or the Fund's ability to fully recoup
its initial investment in these securities, even if the security is in one of
the highest rating categories.

OTHER ASSET-BACKED SECURITIES

     The Fund may invest in securities that are backed by a diversified pool of
assets other than mortgages such as trade, credit card and automobile
receivables.  Asset-backed securities are generally issued by special purpose
entities in the form of debt instruments.  The characteristics and risks of
automobile and credit card receivables are described below.

     Automobile Receivable Securities.  The Fund may invest in asset-backed
securities which are backed by receivables from motor vehicle installment sales
contracts or installment loans secured by motor vehicles ("Automobile Receivable
Securities").  Since installment sales contracts for motor vehicles or
installment loans related to such contracts ("Automobile Contracts") typically
have shorter durations and lower incidences of prepayment, Automobile Receivable
Securities generally will exhibit a shorter average life and are less
susceptible to prepayment risk.

     Most entities that issue Automobile Receivable Securities create an
enforceable interest in their respective Automobile Contracts only by filing a
financing statement and by having the servicer of the Automobile Contracts,
which is usually the originator of the Automobile Contracts, take custody of the
Automobile Contract.  In such circumstances, if the servicer of the Automobile
Contracts were to sell the Automobile Contracts to another party, in violation
of its obligation not to do so, there is a risk that such party could acquire an
interest in the Automobile Contracts superior to that of the holders of
Automobile Receivable Securities.  Also, although most Automobile Contracts
grant a security interest in a motor vehicle being financed, in most states the
security interest in a motor vehicle must be noted on the certificate of title
to create an enforceable security interest against competing claims of other
parties.  Due to the large number of vehicles involved, however, the certificate
of title to each vehicle financed, pursuant to the Automobile Contracts
underlying the Automobile Receivable Security, is usually not amended to reflect
the assignment of the seller's security interest for the benefit of the holders
of the Automobile Receivable Securities.  Therefore, there is the possibility
that recoveries on repossessed collateral may not, in some cases, be available
to support payments on the securities.  In addition, various state and federal
securities laws give the motor vehicle owner the right to assert against the
holder of the owner's Automobile Contract certain defenses such owner would have
against the seller of the motor vehicle.  The assertion of such defenses could
reduce payments on the Automobile Receivable Securities.  Investment grade
Automobile Receivable Securities are typically over-collateralized and have
other forms of credit enhancement to mitigate these risks.

     Credit Card Receivable Securities.  The Fund may invest in asset-backed
securities backed by a diversified pool of receivables from revolving credit
card agreements ("Credit Card Receivable Securities").  Credit balances on
revolving credit card agreements ("Accounts") are generally paid down more
rapidly than are Automobile Contracts.  Most Credit Card Receivable Securities
provide for a fixed period during which only interest payments are paid to the
security holder.  Principal payments received on underlying Accounts are used to
purchase additional assets.  The initial fixed period usually may be shortened
upon the occurrence of specified events which signal a potential deterioration
in the quality of the assets backing the security, such as the imposition of a
cap on interest rates.  The ability of the issuer to make principal and interest
payments on Credit Card Receivable Securities thus depends upon the continued
generation of additional principal amounts in the underlying accounts during the
initial period and the non-occurrence of specified events.  An acceleration in
cardholders' payments rates or any other event which shortens the period during
which additional credit card charges on an Account may be transferred to the
pool of assets supporting the related Credit Card Receivable Security could
shorten the weighted average life and reduce the yield of the Credit Card
Receivable Security.

     Credit cardholders are entitled to the protection of a number of state and
federal consumer credit laws, many of which give such holder the right to set
off certain amounts against balances owed on the credit card, thereby 

                                       10
<PAGE>
 
reducing amounts paid on Accounts. In addition, unlike most other asset backed
securities, Accounts are unsecured obligations of the cardholder.

    
                IN KIND PURCHASES OF CLASS A SHARES OF THE FUND      
    
     Shares of the Fund are continuously offered at their net asset value next
determined after an order is accepted.  The methods available for purchasing
shares of the Fund are described in the Prospectus.  In addition, shares of the
Fund may be purchased using securities, so long as the securities delivered to
the Fund meet the investment objective and policies of the Fund, including its
investment restrictions, and are otherwise acceptable to the Sub-Adviser, which
reserves the right to reject all or any part of the securities offered in
exchange for shares of the Fund.  Among other things, the Sub-Adviser will
consider the following criteria in determining whether to accept securities for
"in-kind" purchase of Fund shares.      

     (1) The securities offered by the investor in exchange for shares of the
Fund must be readily marketable and must not be in any way restricted as to
resale or otherwise be illiquid.

     (2) The securities must have a value which is readily ascertainable in
accordance with the procedures used by the Fund to value its portfolio
securities.
    
     The Fund believes that this ability to purchase shares of the Fund using
securities provides a means by which holders of certain securities may obtain
diversification and continuous professional management of their investments
without the expense of selling those securities in the public market.  Benefits
to the Fund may include the ability to acquire desirable securities at a lower
transaction cost.       
    
     An investor who wishes to make an "in kind" purchase must furnish in
writing to the Fund a list with a full and exact description of all of the
securities which the investor proposes to deliver.  The Fund will advise him or
her as to those securities which it is prepared to accept and will provide the
investor with the necessary forms to be completed and signed by the investor.
The investor should then send the securities, in the proper form for transfer,
with the necessary forms to the Fund and certify that there are no legal or
contractual restrictions on the free transfer and sale of the securities.  The
securities will be valued as of the close of business on the day of receipt by
the Fund in the same manner as portfolio securities of the Fund are valued.
(See the section entitled "Net Asset Value" in the Prospectus.)  The number of
shares of the Fund, having a net asset value as of the close of business on the
day of receipt equal to the value of the securities delivered by the investor,
will be issued to the investor.      
    
     The exchange of securities by the investor pursuant to this offer will
constitute a taxable transaction and may result in a gain or loss for Federal
income tax purposes.  Each investor should consult his or her tax adviser to
determine the tax consequences under Federal and state law of making such an "in
kind" purchase.       


                                 SPECIAL TAX MATTERS

          The Fund may write, purchase or sell futures, or forward contracts.
Futures contracts that are "Section 1256 contracts" will be "marked to market"
for federal income tax purposes at the end of each taxable year, i.e., each such
futures contract will be treated as sold for its fair market value on the last
day of the taxable year.  Code Section 1092, which applies to certain
"straddles" may affect the taxation of the Fund's transactions in futures and
forward contracts.  Under Section 1092, the Fund will be required to postpone
recognition for tax purposes of losses incurred in certain closing transactions
involving futures and forward contracts.

                                       11
<PAGE>
 
          One of the requirements for qualification as a regulated investment
company is that less than 30% of the Fund's gross income is derived from gains
from the sale or other disposition of securities held for less than three
months, therefore the Fund may be restricted in effecting closing transactions
within three months after entering into futures or forward contracts.

          As a result of the "mark to market" rules discussed above and
amortization of income from bonds purchased at a discount, the Fund may realize
taxable income not represented by actual receipt of cash.  If such income is
significant, then the Fund may have to sell portfolio securities to pay out
required distributions in order to avoid taxation at the Fund level.

Dual-Class Structure.  The Fund intends to seek a ruling from the Internal
Revenue Service ("IRS") to the effect that differing distributions between the
classes of its shares will not result in the Fund's dividends and other
distributions being regarded as "preferential dividends" under the Code.
Generally, a preferential dividend is a dividend which the Fund cannot treat as
having been distributed for purposes of (i) determining whether the Fund
qualifies as a regulated investment company ("RIC") for federal tax purposes,
and (ii) determining the Fund's tax liability.  While rulings similar to those
to be requested have been issued previously by the IRS, complete assurance
cannot be given that the Fund will receive such a ruling.  Although an adverse
determination by the IRS is not currently expected, the Fund may be required to
reassess its dual class share structure (and reserves the right to do so) if the
IRS does not rule favorably since that could impact the Fund's ability to
qualify as a RIC.


           INVESTMENT ADVISER, SUB-ADVISER AND SERVICES ADMINISTRATOR
    
          Ariel Capital Management, Inc. (the "Adviser"), 307 North Michigan
Avenue, Suite 500, Chicago, Illinois 60601, which is controlled by John W.
Rogers, Jr., acts as investment adviser and services administrator under a
management agreement with the Trust ("Management Agreement").      

          The Management Agreement between the Trust and the Adviser will remain
in effect as to the Fund indefinitely, provided continuance is approved at least
annually by vote of the Board of Trustees of the Trust or by the holders of a
majority of the outstanding shares of the Fund; and further provided that such
continuance is also approved annually by the vote of a majority of the Trustees
of the Trust who are not parties to the Agreement or interested persons of
parties to the Agreement or interested persons of such parties, cast in person
at a meeting called for the purpose of voting on such approval. The Management
Agreement may be terminated without penalty by the Trust or the Adviser upon 60
days' prior written notice; it automatically terminates in the event of its
assignment.      

          Pursuant to the Management Agreement, the Adviser provides the Fund
with office space, administrative services, furnishes executive and other
personnel to the Fund and is responsible for providing or overseeing the Fund's
day-to-day management and administration.      

                                       12
<PAGE>
 
         
          Lincoln Capital Management Company (the "Sub-Adviser"), 200 South
Wacker Drive, Chicago, IL  60606, acts as the Sub-Adviser of the Fund.  Under a
Sub-Advisory agreement with the Advisor, the Sub-Adviser manages the day-to-day
investment operations for the Fund. The Fund pays no fees directly to the Sub-
Adviser. The Fund pays all operating expenses not expressly assumed by the
Adviser, including custodial and transfer agency fees, federal and state
securities registration fees, legal and audit fees, and brokerage commissions
and other costs associated with the purchase and sale of portfolio securities,
except that, pursuant to the Management Agreement, the Adviser must reimburse
the Fund if the Fund's annual expenses (excluding brokerage, taxes, interest,
Distribution Plan expenses and extraordinary items) exceed 1.50% of the first
$30 million of the Fund's average daily net assets and 1% of such assets in
excess of $30 million.      

          The Adviser and Sub-Advisor have adopted Codes of Ethics which
regulate the personal securities transactions of the Adviser's and the Sub-
Adviser's investment personnel and other employees and affiliates with access to
information regarding securities transactions of the Fund. Both Codes of Ethics
require investment personnel to disclose all personal securities holdings upon
commencement of employment and all subsequent trading activity to the firm's
Compliance Officer. Investment personnel are prohibited from engaging in any
securities transactions, including the purchase of securities in a private
offering, without the prior consent of the Compliance Officer. Additionally,
such personnel are prohibited from purchasing securities in an initial public
offering and are prohibited from trading in any securities (i) for which the
Fund has a pending buy or sell order, (ii) which the Fund is considering buying
or selling, or (iii) which the Fund purchased or sold within seven calendar
days.


                  METHOD OF DISTRIBUTION OF THE CLASS B SHARES      

          The Trust has entered into an agreement with Ariel Distributors, Inc.
("Ariel Distributors") whereby Ariel Distributors serves as the principal
underwriter to distribute the Fund's shares on a no-load basis.  Pursuant to the
Underwriting Agreement, Ariel Distributors receives a fee at the annual rate of
0.25% of the Fund's average daily net assets of the Class B shares for
distribution services to such class and for assuming certain marketing expenses.
     
          The Trust has also adopted a Distribution Plan pursuant to Rule 12b-1
under the Investment Company Act of 1940 with respect to the Class B shares of
the Fund (the "Distribution Plan").  Rule 12b-1 permits an investment company to
finance, directly or indirectly, any activity which is primarily intended to
result in the sale of its shares only if it does so in accordance with the
provisions of such Rule.  The Distribution Plan authorizes the Trust to pay up
to 0.30% annually of the average daily net assets of the Class B shares in
connection with the distribution of the Class B shares.  Consistent with the
Underwriting Agreement, however, payments under the Distribution Plan are
currently limited by the Board of Trustees to 0.25% annually of such average
daily net asset value.      

          The Distribution Plan was approved by the Board of Trustees, including
the Trustees who are not "interested persons" of the Fund (as that term is
defined in the Investment Company Act of 1940) and who have no direct financial
interest in the operation of the Plan or in any agreements related to the
Distribution Plan (the "Independent Trustees").  The selection and nomination of
the Independent Trustees is committed to the discretion of such Independent
Trustees.  In establishing the Distribution Plan, the Trustees considered
various factors including the amount of the distribution fee.  The Trustees
determined that there is a reasonable likelihood that the Distribution Plan will
benefit the Trust and its shareholders.

          The Distribution Plan may be terminated as to the Class B shares by
vote of a majority of Independent Trustees, or by vote of a majority of the
outstanding Class B shares.  Any change in the Distribution Plan that would
materially increase the distribution cost to the class requires approval of the
shareholders       

                                       13
<PAGE>
 
    
of that class; otherwise, the Distribution Plan may be amended by the Trustees,
including a majority of the Independent Trustees.      

          The Distribution Plan will continue in effect indefinitely, if not
terminated in accordance with its terms, provided that such continuance is
annually approved by (i) the vote of a majority of Independent Trustees, and
(ii) the vote of a majority of the entire Board of Trustees.

          Apart from the Distribution Plan, the Adviser, at its expense, may
incur costs and pay expenses associated with the distribution of shares of the
Fund, including compensation to broker-dealers in consideration of promotional
or administrative services.


                          TRANSFER AGENT AND CUSTODIAN

          Investors Fiduciary Trust Company (''IFTC'') has been retained by the
Trust to act as transfer agent, custodian, dividend disbursing agent and
shareholder servicing agent. These responsibilities include: responding to
shareholder inquiries and instructions concerning their accounts; crediting and
debiting shareholder accounts for purchases and redemptions of Fund shares and
confirming such transactions; updating of shareholder accounts to reflect
declaration and payment of dividends; keeping custody of all of the Fund's
investments; and preparing and distributing quarterly statements to shareholders
regarding their accounts.


                             PORTFOLIO TRANSACTIONS

          In addition to its management of the Fund's portfolio, the Sub-Adviser
also acts as investment adviser to various private accounts.  There may be times
when an investment decision may be made to purchase or sell the same security
for the Fund and one or more clients of the Sub-Adviser.  In those
circumstances, the transactions will be allocated as to amount and price in a
manner considered equitable to each.  In some instances, this procedure could
adversely affect the Fund but the Fund deems that any disadvantage in the
procedure would be outweighed by the increased selection available and the
increased opportunity to engage in volume transactions.


                              INDEPENDENT AUDITORS

          The Fund's independent auditors, Ernst & Young LLP, 233 South Wacker
Drive, Chicago, IL 60606, audit and report on the Fund's annual financial
statements, review certain regulatory reports and the Fund's federal income tax
returns, and perform other professional accounting, auditing, tax and advisory
services when engaged to do so by the Fund. Shareholders will receive annual
audited financial statements and semi-annual unaudited financial statements.


                              GENERAL INFORMATION

          The Fund, together with Ariel Growth Fund and the Ariel Appreciation
Fund are the three series of Ariel Growth Fund (doing business as Ariel
Investment Trust), an open-end, diversified management investment company
organized as a serial Massachusetts business trust on April 1, 1986. The
Declaration of Trust contains an express disclaimer of shareholder liability for
acts or obligations of the Trust. The shareholders of a Massachusetts business
trust might, however, under certain circumstances, be held personally liable as
partners for its obligations. The Declaration of Trust provides for
indemnification and reimbursement of expenses out of Trust assets for any
shareholder held personally liable for obligations of the Trust.

                                       14
<PAGE>
 
          Each share of a series of the Trust represents an equal proportionate
interest in that series and is entitled to such dividends and distributions out
of the income belonging to such shares as declared by the Board. Upon any
liquidation of the Trust, shareholders are entitled to share pro rata in the net
assets belonging to that series available for distribution.

          The Prospectus and this Statement of Additional Information do not
contain all the information in the Fund's registration statement. The
registration statement is on file with the Securities and Exchange Commission
and is available to the public.


                             TRUSTEES AND OFFICERS

          Set forth below are the principal business affiliations of the
Trustees and Officers during the last five years:
    
MARIO L. BAEZA, ESQ., Trustee. Mr. Baeza is President of Wasserstein Perella
International Limited, and Managing Director and Chief Executive Officer,
Americas Division, Wasserstein Perella & Co., Inc. Formerly, he was a partner
with Debevoise and Plimpton. Address: 875 Third Avenue, New York, New York
10022.       
    
WILLIAM C. DIETRICH, CPA, Trustee. Mr. Dietrich is Chief Financial Officer for
Home Shopping Alternatives, Inc. He formerly served as Chief Financial Officer
for Shoppers Express, Inc. and Practice Director for Johnson, Lambert & Co.
Address: 6 Yearling Court, Rockville, Maryland 20816.      
    
ROYCE N. FLIPPIN, JR., MBA, Trustee.  Mr. Flippin is President of Flippin
Associates.  Formerly, he was Director of Program Advancement at the
Massachusetts Institute of Technology and was the Director of Athletics,
Physical Education and Recreation at MIT and Princeton University. Address: 120
Massachusetts Avenue, Cambridge, Massachusetts 02139.       
    
JOHN G. GUFFEY, JR., Trustee. Mr. Guffey is chairman of the Calvert Social
Investment Foundation, organizing director of the Community Capital Bank in
Brooklyn, New York, and a financial consultant to various organizations. In
addition, he is the Treasurer and Director of Silby, Guffey and Co., Inc., a
venture capital firm. Mr. Guffey was formerly an officer and is a
trustee/director of each of the investment companies in the Calvert Group of
Funds, except for Acacia Capital Corporation. Address: 7205 Pomander Lane, Chevy
Chase, Maryland 20815.      
    
CHRISTOPHER G. KENNEDY, MBA Trustee. Mr. Kennedy is Executive Vice President and
a Director of Merchandise Mart Properties, Inc., a real estate management firm.
Prior to 1991, he was a student at the J.L. Kellogg Graduate School of
Management at Northwestern University. Address: The Merchandise Mart, 200 World
Trade Center, Suite 470, Chicago, Illinois 60654.      
    
BERT N. MITCHELL, MBA, CPA, Chairman of the Board and Trustee. Mr. Mitchell is
the Chairman and Chief Executive Officer of Mitchell, Titus & Co., the nation's
largest minority-owned certified public accounting firm. Address: One Battery
Park Plaza, New York, New York 10004.      
    
/1/MELLODY L. HOBSON, Trustee. Ms. Hobson is Senior Vice President, Director of
Marketing of Ariel Capital Management. Prior to 1991, she was a student at
Princeton University, Princeton, New Jersey. Address: 307 North Michigan Avenue,
Suite 500, Chicago, Illinois 60601.      
    
/1/ERIC T. MCKISSACK, Trustee and President. Mr. McKissack is Vice Chairman and
Co-Chief Investment Officer of Ariel Capital Management. Formerly, Mr. McKissack
was a research analyst at First National Bank of Chicago. Address: 307 North
Michigan Avenue, Suite 500, Chicago, Illinois 60601.      

                                       15
<PAGE>
 
    
/1/ROGER P. SCHMITT, Vice President, Secretary and Assistant Treasurer. Mr.
Schmitt is Chief Operating Officer of Ariel Capital Management. Formerly, Mr.
Schmitt was Marketing Manager with IBM Corporation. Address: 307 North Michigan
Avenue, Suite 500, Chicago, Illinois 60601.      
    
/1/EDWARD SINGLETON, Treasurer and Assistant Secretary. Mr. Singleton is Chief
Financial Officer of Ariel Capital Management. He also operates an accounting
and tax consulting business. Formerly, Mr. Singleton was Manager of Tax and
Regulatory Compliance for American Drug Stores, Inc., a subsidiary of American
Stores Company. Address: 307 North Michigan Avenue, Suite 500, Chicago, Illinois
60601.      

- --------------
/1/Officers and trustees deemed to be ''interested persons'' of the Fund under
   the Investment Company Act of 1940.

                             COMPENSATION SCHEDULE

     During the fiscal year ended September 30, 1994, compensation paid to the
trustees of the Trust not affiliated with the Adviser was as follows:
<TABLE>
<CAPTION>
 
 
                    NAME                      COMPENSATION
                    ----------------------    -------------
                   <S>                        <C>
                    Mario L. Baeza               $8,200
                    William C. Dietrich          $7,400
                    Royce N. Flippin, Jr.        $8,200
                    John G. Guffey, Jr.          $7,400
                    Christopher G. Kennedy       $0*
                    Bert N. Mitchell             $8,200
 
</TABLE>
*Mr. Kennedy was not a Trustee during the fiscal year ended September 30, 1994.

                        CALCULATION OF PERFORMANCE DATA

TOTAL RETURN

     The Fund may advertise performance in terms of average annual total return
for 1-, 5- and 10-year periods, or for such lesser periods as the Fund has been
in existence.  Average annual total return is computed by finding the average
annual compounded rates of return over the periods that would equate the initial
amount invested to the ending redeemable value, according to the following
formula:

                         P(1 + T) to the nth power = ERV
 
Where:     P    =   a hypothetical initial payment of $1,000
           T    =   average annual total return
           n    =   number of years
           ERV  =   ending redeemable value of a hypothetical $1,000 payment
                    made at the beginning of the 1-, 5- or 10-year periods at
                    the end of the year or period.
 
     The calculation assumes all charges are deducted from the initial $1,000
payment and assumes all dividends and distributions by the Fund are reinvested
at the price stated in the prospectus on the reinvestment dates during the
period, and includes all recurring fees that are charged to all shareholder
accounts.

                                       16
<PAGE>
 
YIELD

     The Fund may advertise performance in terms of a 30-day yield quotation.
The 30-day yield quotation is computed by dividing the net investment income per
share earned during the period by the maximum offering price per share on the
last day of the period, according to the following formula:

                               a-b
                    Yield=2[( ------ + 1) to the sixth power - 1]
                                cd
 
Where:  a  =   dividends and interest earned during the period
        b  =   expenses accrued for the period (net of reimbursement)
        c  =   the average daily number of shares outstanding during the period
               that were entitled to receive dividends 
        d  =   the maximum offering price per share on the last day of the
               period
 
NONSTANDARDIZED TOTAL RETURN

     The Fund may provide the above described standard total return results for
a period which ends not earlier than the most recent calendar quarter end and
which begins either twelve months before or at the time of commencement of the
Fund's operations.  In addition, the Fund may provide nonstandardized total
return results for differing periods, such as for the most recent six months.
Such nonstandardized total return is computed as otherwise described under
"Total Return" except that no annualization is made.


DISTRIBUTION RATES

     In its sales literature, the Fund may also quote its distribution rate
along with the above described standard total return and yield information.  The
distribution rate is calculated by annualizing the latest distribution and
dividing the result by the offering price per share as of the end of the period
to which the distribution relates.  A distribution can include gross investment
income from debt obligations purchased at a premium and in effect include a
portion of the premium paid.  A distribution can also include gross short-term
capital gains without recognition of any unrealized capital losses.  Further, a
distribution can include income from the sale of options by the Fund even though
such option income is not considered investment income under generally accepted
accounting principles.

     Because a distribution can include such premiums, capital gains and option
income, the amount of the distribution may be susceptible to control by the
Adviser through transactions designed to increase the amount of such items.
Also, because the distribution rate is calculated in part by dividing the latest
distribution by net asset value, the distribution rate will increase as the net
asset value declines.  A distribution rate can be greater than the yield rate
calculated as described above.

                                  
                              FINANCIAL STATEMENTS     

                              
                            Ariel Premier Bond Fund

                      Statement of Assets and Liabilities

                                  May 23, 1995      

                                       17
<PAGE>

<TABLE>    
<CAPTION>
 
                                                    ASSETS
<S>                                                 <C>
 
     Cash                                           $10,000
 
     Unamortized organization costs                  28,000
 
     Prepaid initial registration expenses           24,765
                                                    -------
 
        Total Assets                                 62,765
                                                    -------
 
 
     LIABILITIES
 
     Payable to Adviser                              24,765
 
     Accrued professional fees                       28,000
                                                    -------
 
        Total Liabilities                            52,765
                                                    -------
 
 
     NET ASSETS                                     $10,000
                                                    =======
 
     Capital shares (no par value), unlimited
     shares authorized outstanding                    1,000
                                                    =======
 
     Net asset value, redemption price and
     offering price per share (net assets/shares
     outstanding)                                    $10.00
                                                    =======
</TABLE>     
    
The accompanying notes to statement of assets and liabilities are an integral
part of this statement.

                            Ariel Premier Bond Fund

                  Notes to Statement of Assets and Liabilities

                                  May 23, 1995

(1)  Organization
     ------------

     Ariel Growth Fund (doing business as Ariel Investment Trust) (the "Trust")
     is a Massachusetts business trust registered under the Investment Company
     Act of 1940, as amended, as an open-end management investment company.  The
     Growth Fund and the Appreciation Fund are existing diversified portfolios
     of the Trust.  The Premier Bond Fund (the "Fund") (a new series of the
     Trust) has had no operations, other than those relating to organizational
     matters, including the sale and issuance of 1,000 shares of Class A to
     Ariel Capital Management, Inc. (the "Adviser") on May 23, 1995 for
     consideration in the amount of $10,000.  Shares of the Fund will be issued
     in two classes designated Class A (an institutional class) and Class B (a
     retail class).

(2)  Significant Accounting Policies
     -------------------------------

     (a)  Organization Costs

          Costs incurred by the Fund in connection with its organization,
          registration and the initial public offering of shares have been
          deferred and will be amortized on a straight-line basis over a period
          of five years from the date upon
     

                                      18
<PAGE>
 
    
          which the Fund commences its investment activities. If any of the
          original shares of the Fund purchased by the Adviser are redeemed by
          any holder thereof prior to the end of the amortization period, the
          redemption proceeds will be reduced by the pro rata share of the
          unamortized expenses as of the date of redemption. The pro rata share
          by which the proceeds are reduced will be derived by dividing the
          number of original shares of the Fund being redeemed by the total
          number of original shares outstanding at the time of redemption.

     (b)  Federal Income Taxes

          The Fund intends to comply with the requirements of the Internal
          Revenue Code necessary to qualify as a regulated investment company
          and to make the requisite distributions of income to its shareholders
          which will be sufficient to relieve it from all or substantially all
          Federal income taxes.

(3)  Investment Adviser
     ------------------

     The Fund has an agreement with the Adviser to furnish investment advisory
     services to the Fund.  Under the terms of this agreement, the Fund will pay
     the Adviser a monthly fee at the annual rate of the following percentages
     on average daily net assets: 0.45% on the first billion dollars, 0.425% on
     the next billion dollars and 0.40% on average daily net assets over $2
     billion.

(4)  Distribution Plan
     -----------------

     Pursuant to Rule 12b-1 of the Investment Company Act of 1940, the Trust has
     adopted a distribution plan which permits the Fund to pay certain expenses
     associated with the distribution of its shares up to 0.30% annually of the
     Fund's average daily net asset value.  Such expenses are currently limited
     to an annual rate of 0.25% of the Fund's average daily net assets by the
     Board of Trustees.  Furthermore, the Class A shares of the Premier Bond
     Fund are not subject to a 12b-1 fee.  Ariel Distributors, Inc., an
     affiliate of the Adviser, serves as the Trust's principal underwriter
     pursuant to the Underwriting Agreement with the Trust.



                         REPORT OF INDEPENDENT AUDITORS
                         ------------------------------


To the Shareholder and Board of Trustees of
     Ariel Investment Trust - Ariel Premier Bond Fund


     We have audited the accompanying statement of assets and liabilities of the
Ariel Premier Bond Fund (the "Fund") constituting a new series of Ariel
Investment Trust (the "Trust"), as of May 23, 1995.  This statement of assets
and liabilities is the responsibility of the Trust's management.  Our
responsibility is to express an opinion on this statement of assets and
liabilities based on our audit.

     We conducted our audit in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the statement of assets and liabilities is
free of material misstatement.  An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the statement of assets and
liabilities.  An audit also includes assessing the accounting principles used
and significant estimates made by management, as well as evaluating the overall
statement of assets and liabilities presentation.  We believe that our audit of
the statement of assets and liabilities provides a reasonable basis for our
opinion.

     In our opinion, the statement of assets and liabilities referred to above
presents fairly, in all material respects, the financial position of the Fund at
May 23, 1995, in conformity with generally accepted accounting principles.
     

                                       19
<PAGE>

     
Chicago, Illinois                                   /s/ Ernst & Young LLP
May 23, 1995
     

                                       20
<PAGE>
 
                                   APPENDIX A

                             Interest Rate Futures

     The Fund may purchase and sell interest rate futures contracts with respect
to interest rate related instruments.

     A futures contract creates a binding obligation on the purchaser (the
"long") to accept delivery, and the seller (the "short") to make delivery, of
the face amount of the security underlying the futures contract in a stated
delivery month, at a price fixed in the contract or to make a cash settlement in
lieu of actual delivery.  A majority of transactions in futures contracts,
however, do not result in actual delivery of the underlying security, but are
settled through liquidation by entering into an offsetting transaction.  Futures
contracts are traded only on commodity exchanges ("contract markets") approved
by the Commodity Futures Trading Commission ("CFTC").  Transactions in futures
contracts must be executed through a broker/dealer which is registered with the
CFTC or a futures commission merchant ("FCM") which is a member of the relevant
contract market.

     The purchase or sale of a futures contract differs from the purchase or
sale of a security in that the total cash value reflected by the futures
contract is not paid.  Instead, an amount of cash or securities acceptable to
the Fund's FCM and the relevant contract market, which varies, but may be 5% or
less of the contract amount, must be deposited with the FCM.  This amount is
known as "initial margin," and represents a "good faith" deposit (like a down
payment) assuring the performance of both the purchaser and the seller under the
futures contract.  Subsequent payments to and from the FCM, known as "variation
margin," are required to be made on a daily basis as the price of the futures
contract fluctuates, making the long or short positions in the futures contract
more or less valuable, a process known as "marking to market."  Prior to the
settlement date of the futures contract, the position may be closed out by
taking an opposite position which will operate to terminate the position in the
futures contract.  A final determination of variation margin is then made,
additional cash is required to be paid to or released by the FCM, and the Fund
realizes a loss or gain.  In addition, a commission is paid on each completed
purchase and sale transaction.

     The Fund will deal only in standardized contracts on recognized exchanges.
The clearing members of an exchange's clearing corporation guarantee the
performance of their futures contracts through the clearing corporation, a
nonprofit organization managed by the exchange membership which is also
responsible for handling daily accounting of deposits or withdrawals of margin.

                                       21
<PAGE>
 
                                  APPENDIX B


CORPORATE BOND AND COMMERCIAL PAPER RATINGS

The following is a description of Moody's Investors Service, Inc.'s bond
ratings:

Aaa: Bonds which are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as ''gilt
edged.'' Interest payments are protected by a large or by an exceptionally
stable margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are unlikely to impair the
fundamentally strong position of such issues.

Aa: Bonds which are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group, they compromise what are generally known as high
grade bonds. They are rated lower than the best bonds because margins of
protection may not be as large as in Aaa securities or fluctuation of protective
elements may be of greater amplitude or there may be other elements present
which make long-term risks appear somewhat larger than Aaa securities.

A: Bonds which are rated A possess many favorable investment attributes and are
to be considered as upper-medium-grade obligations. Factors giving security to
principal and interest are considered adequate, but elements may be present
which suggest a susceptibility to impairment sometime in the future.

Baa: Bonds which are rated Baa are considered as medium grade obligations, i.e.
they are neither highly protected nor poorly secured. Interest payments and
principal security appear adequate for the present but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.

The following is a description of Standard & Poor's Corporation's investment
grade bond ratings:

AAA: Bonds rated AAA are considered highest grade obligations. They possess the
ultimate degree of protection as to principal and interest. They move with
market interest rates, and thus provide the maximum safety on all counts.

AA: Bonds rated AA are high-grade obligations. In the majority of instances,
they differ from AAA issues only to a small degree. Prices of AA bonds also move
with the long-term money market.

A: Bonds rated A are upper medium grade obligations. They have considerable
investment strength, but are not entirely free from adverse effects of change in
economic and trade conditions. Interest and principal are regarded as safe. They
predominantly reflect money rates in their market behavior but, to some extent,
also economic conditions.

BBB: Bonds rated BBB are medium grade obligations. They are considered
borderline between definitely sound obligations and those where the speculative
element begins to predominate. These bonds have adequate asset coverage and are
normally protected by satisfactory earnings. Their susceptibility to changing
conditions, particularly to depressions, necessitates constant monitoring. These
bonds are more responsive to business and trade conditions than to interest
rates. This group is the lowest that qualifies for commercial bank investment.

Commercial paper rated A by Standard & Poor's Corporation has the following
characteristics: liquidity ratios are adequate to meet cash requirements; long-
term senior debt is rated ''A'' or better; the issuer has access to at least two
adequate channels of borrowing; basic earnings and cash flow have an upward
trend with allowance made for 

                                       22
<PAGE>
 
unusual circumstances; typically, the issuer's industry is well-established and
the issuer has a strong position within the industry; and the reliability and
quality of management are unquestioned. The relative strength or weakness of the
above factors determines whether an issuer's commercial paper is rated A-1, A-2,
or A-3.

Issuers rated Prime-1 by Moody's Investors Services, Inc., are considered to
have superior capacity of repayment of short-term promissory obligations. Such
repayment capacity will normally be evidenced by the following characteristics:
leading market positions in well-established industries; high rates of return on
funds employed; conservative capitalization structure with moderate reliance on
debt and ample asset protection; broad margins in earnings coverage of fixed
financial charges and high internal cash generation; and well-established access
to a range of financial markets and assured sources of alternate liquidity.
Issuers rated Prime-2 have a strong capacity for repayment of short-term
promissory obligations. This will normally be evidenced by many of the
characteristics cited above but to a lesser degree. Earnings trends and coverage
ratios, while sound, will be more subject to variation. Capitalization
characteristics, while still appropriate, may be more affected by external
conditions. Ample alternate liquidity is maintained.

                                       23
<PAGE>
 
                           PART C.  OTHER INFORMATION

ITEM 24.  FINANCIAL STATEMENTS AND EXHIBITS

     (a)  Financial statements - None

          No financial statements are necessary because the sole purpose of this
          Post-Effective Amendment is to add a new series which currently has no
          assets or history of operations.

     (b)  Exhibits:

          1.   Declaration of Trust (incorporated by reference to Registrant's
               initial registration statement, August 1, 1986).

          2.   By-Laws (incorporated by reference to Registrant's initial
               registration statement, August 1, 1986).

          3.   Not Applicable.

          4a.  Specimen Stock Certificate with respect to Ariel Growth Fund
               series (incorporated by reference to Registrant's Pre-Effective
               Amendment No. 2, November 4, 1986).

          4b.  Specimen Stock Certificate with respect to Ariel Appreciation
               Fund series (incorporated by reference to Registrant's Post-
               Effective Amendment No. 7, December 29, 1989).

          5a.  Investment Advisory Agreement with respect to Ariel Premier Bond
               Fund.

          5b.  Sub-Advisory Agreement (incorporated by reference to Registrant's
               Post-Effective Amendment No. 15, June 6, 1995).

          5c.  Administrative Services Agreement with respect to Ariel Premier
               Bond Fund.

          6.   Underwriting Agreement (incorporated by reference to Registrant's
               Post-Effective Amendment No. 15, June 6, 1995).

          7.   Not Applicable.

          8.   Custodian Agreement (incorporated by reference to Registrant's
               Post-Effective Amendment No. 13, July 6, 1994).
<PAGE>
 
          9.   Transfer Agency Contract (incorporated by reference to
               Registrant's Post-Effective Amendment No. 13, July 6, 1994).

          10.  Opinion and Consent of Counsel as to Legality of Shares Being
               Registered (incorporated by reference to Registrant's Post-
               Effective Amendment No. 12, November 17, 1993).

          11.  Not applicable.

          12.  Not Applicable.

          13.  Not Applicable.

          14.  Retirement Plans (incorporated by reference to Registrant's Post-
               Effective Amendment No. 13, July 6, 1994).

          15.  Rule 12b-1 Distribution Plan with respect to Ariel Growth Fund
               and Ariel Appreciation Fund (incorporated by reference to
               Registrant's initial registration statement, August 1, 1986).

          16.  Schedule for Computation of Performance Quotation (incorporated
               by reference to Registrant's Post-Effective Amendment No. 15,
               June 6, 1995).

          17.  Not Applicable.
    
          18a. Power of Attorney 

          18b. Plan Pursuant to Rule 18f-3      

ITEM 25.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT

               Not Applicable.

ITEM 26.  NUMBER OF HOLDERS OF SECURITIES

     As of July 31, 1995, there were 10,389 holders of record of Registrant's
shares of beneficial interest for Ariel Growth Fund.

     As of July 31, 1995, there were 12,652 holders of record of Registrant's
shares of beneficial interest for Ariel Appreciation Fund.

                                       2
<PAGE>
 
     As of July 31, 1995, there were no holders of record of Registrant's shares
of beneficial interest for Ariel Premier Bond Fund.

ITEM 27.  INDEMNIFICATION

     Registrant's Declaration of Trust, which Declaration is Exhibit 1 of the
Initial Registration Statement dated August 1, 1986, provides, in summary, that
officers, trustees, employees, and agents shall be indemnified by Registrant
against liabilities and expenses incurred by such persons in connection with
actions, suits, or proceedings arising out of their offices or duties of
employment, except that no indemnification can be made to such a person if he
has been adjudged liable of willful misfeasance, bad faith, gross negligence, or
reckless disregard of his duties.  In the absence of such an adjudication, the
determination of eligibility for indemnification shall be made by independent
counsel in a written opinion or by the vote of a majority of a quorum of
trustees who are neither "interested persons" of Registrant, as that term is
defined in Section 2(a)(19) of the Investment Company Act of 1940, nor parties
to the proceeding.

     Registrant's Declaration of Trust also provides that Registrant may
purchase and maintain liability insurance on behalf of any officer, trustee,
employee or agent against any liabilities arising from such status.  In this
regard, Registrant maintains, jointly with the Adviser, a Directors & Officers
(Partners) Liability Insurance policy with American International Surplus Lines
Insurance Company, 15 Mountain View Road, Warren, New Jersey 07061, providing
Registrant and the Adviser with $4 million in directors and officers liability
coverage.  Pursuant to an agreement between the Registrant and the Adviser, no
more than $2 million can be used by either party.

ITEM 28.  BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

     Ariel Capital Management, Inc., the Registrant's investment adviser,
renders investment advisory services to individual, institutional and pension
and profit-sharing plan accounts.  The following directors of the adviser have
been engaged in other professions and/or employment capacities during the past
two fiscal years, as indicated below.
<TABLE>
<CAPTION>
 
                              NAME OF COMPANY,
NAME AND TITLE                PRINCIPAL BUSINESS
WITH ADVISER                  ADDRESS                      CAPACITY
- ----------------------------  ---------------------------  -----------
<S>                           <C>                          <C>
 
James E. Bowman, Jr., M.D.    University of Chicago        Professor
Director                      Dept. of Pathology
                              Chicago, IL 60637
 
 
</TABLE>

                                       3
<PAGE>
 
<TABLE>
<S>                           <C>                          <C>
Randall C. Hampton            The Northern Trust           Senior Vice
 Vice-Chairman                30 S. LaSalle Street         President
                              Chicago, IL 60675
 
Herbert D. Odom, D.D.S.       Mal-Mart Medical Group       President
Director                      6333 S. Green Street         and Chief
                              Chicago, IL 60621            Executive
                                                           Officer
 
Henry B. Pearsall             JWE Enterprises              Chairman
                              380 S. Schmale Rd.
                              Carol Stream, IL
 
Anna Perez                    Creative Artists             Director of
Director                      Agency, Inc.                 Media
                              9830 Wilshire Blvd.
                              Beverly Hills CA 90212
 
Robert I. Solomon             Silliker Laboratories        Vice
Director                      900 Maple Road               President,
                              Homewood, IL 60430           Marketing
 
Paula Wolff                   Governors' State University  President
Director                      University Park, IL 60466
 
</TABLE>

ITEM 29. PRINCIPAL UNDERWRITERS

     Ariel Distributors, Inc., located at 307 North Michigan Avenue, Suite 500,
Chicago IL  60601, serves as the principal underwriter of the Registrant.  Ariel
Distributors, Inc. does not act as principal underwriter for any other
investment company.

     (b) Positions of Ariel Distributors' Officers and Directors:
<TABLE>
<CAPTION>
  NAME AND PRINCIPAL         POSITION(S) WITH     POSITION(S) WITH 
   BUSINESS ADDRESS            UNDERWRITER            REGISTRANT
  -----------------          ----------------     ----------------
<S>                          <C>                  <C>
John Washington              President,              None
Rogers, Jr.                  Treasurer and
                             Chairman of the
                             Board

Eric T. McKissack            Vice-Chairman         Trustee and
                                                    President
                                                 
Randall C. Hampton           Vice-Chairman             None
                                                 
Jim Atkinson                 Executive Vice-           None
                             President of
                             Finance and
                             Administration
</TABLE> 

                                       4
<PAGE>
 
<TABLE>
<CAPTION>
  NAME AND PRINCIPAL         POSITION(S) WITH     POSITION(S) WITH 
   BUSINESS ADDRESS            UNDERWRITER           REGISTRANT
  -----------------          ----------------     ----------------
<S>                          <C>                  <C>
Edward Singleton             Chief Financial    Treasurer and
                             Officer, Vice        Assistant
                             President            Secretary

Roger P. Schmitt             Chief Operating   Vice President,
                             Officer, Vice      Secretary and
                             President,           Assistant
                             Secretary            Treasurer

Mellody Hobson               Senior Vice           Trustee
                             President

Betty J. Bennett             Vice President          None

Tinh D. Bui                  Vice President          None

Cheryl A. Cargie             Vice President          None

Gary J. Leong                Vice President          None

Franklin Morton              Vice President          None
</TABLE> 
 
     The business address of the above individuals is 307 North
     Michigan Avenue, Suite 500, Chicago, Illinois 60601.
<TABLE> 
<CAPTION>  
 NAME AND PRINCIPAL        POSITION(S) WITH       POSITION(S) WITH 
  BUSINESS ADDRESS             UNDERWRITER          REGISTRANT                                    
 ------------------        ----------------       ----------------
<S>                        <C>                    <C> 
James E. Bowman, Jr.           Director                None
University of
Chicago
Dept. of Pathology
Chicago, Illinois
60637

Herbert D. Odom,               Director                None
D.D.S.
Mal-Mart Medical
Group
6333 S. Green St.
Chicago, Illinois
60621

Henry B. Pearsall              Director                None
JWE Enterprises
380 S. Schmale Road
Carol Stream, IL
</TABLE> 

                                       5
<PAGE>
 
<TABLE> 
<CAPTION>  
 NAME AND PRINCIPAL        POSITION(S) WITH       POSITION(S) WITH 
  BUSINESS ADDRESS             UNDERWRITER          REGISTRANT                                    
 ------------------        ----------------       ----------------
<S>                        <C>                    <C> 
Robert I. Solomon              Director                None
Silliker
Laboratories
900 Maple Road
Homewood, Illinois
60430

Paula Wolff                    Director                None
Governors' State
University
University Park,
Illinois
60466
</TABLE>
ITEM 30.  LOCATION OF ACCOUNTS AND RECORDS.

     All documents and records are located at Ariel Capital Management, Inc.,
307 North Michigan Avenue, Chicago, Illinois  60601

ITEM 31.  MANAGEMENT SERVICES.

          Not applicable.

ITEM 32.  UNDERTAKINGS.

          The Registrant undertakes to furnish to each person to whom a
     Prospectus is delivered, a copy of the Registrant's latest Annual Report to
     Shareholders, upon request and without charge.

                                       6
<PAGE>
 
                               ARIEL GROWTH FUND

                                   SIGNATURES
                                   ----------

     Pursuant to the requirements of the Securities Act of 1933 and/or the
Investment Company Act of 1940, the Registrant certifies that it has duly caused
this Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Chicago and State of Illinois on the
25th day of August, 1995.


                          ARIEL GROWTH FUND


                    By:  /s/Sheldon R. Stein
                         -------------------
                          Sheldon R. Stein,
                          Attorney-in-fact


     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.



        Signature              Title                    Date
      -------------            -----                    ----

Eric T. McKissack*         Chief Executive          August 25, 1995
- ------------------         Officer and Trustee                       
Eric T. McKissack                              


Edward Singleton*          Principal Financial      August 25, 1995
- ------------------         and Accounting Officer               
Edward Singleton                                  
 



                          *By:/s/Sheldon R. Stein
                              -------------------
                               Sheldon R. Stein,
                               Attorney-in-Fact


     *Sheldon R. Stein signs this document on behalf of the Registrant pursuant 
to the Power of Attorney filed as Exhibit 18(a) to this Registration Statement
and on behalf of the foregoing officers pursuant to the Powers of Attorney filed
as Exhibit 18(a) of Post-Effective Amendment No. 15 to Registrant's Registration
Statement under the Securities Act of 1933.

                                       7
<PAGE>
 
     ARIEL GROWTH FUND

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities and on the dates indicated.
<TABLE>
<CAPTION>
 
Signature                   Title        Date
- -------------------------  -------  ---------------
<S>                        <C>      <C>
 
Mario Baeza*               Trustee  August 25, 1995
- -------------------------
Mario Baeza
 
William C. Dietrich*       Trustee  August 25, 1995
- -------------------------
William C. Dietrich
 
Royce N. Flippin, Jr.*     Trustee  August 25, 1995
- -------------------------
Royce N. Flippin, Jr.
 
John G. Guffey, Jr.*       Trustee  August 25, 1995
- -------------------------
John G. Guffey, Jr.
 
Christopher G. Kennedy*    Trustee  August 25, 1995
- -------------------------
Christopher G. Kennedy
 
Bert N. Mitchell*          Trustee  August 25, 1995
- -------------------------
Bert N. Mitchell
 
Mellody Hobson*            Trustee  August 25, 1995
- -------------------------
Mellody Hobson
</TABLE>

     *Sheldon R. Stein signs this document on behalf of each of the foregoing
persons pursuant to the Powers of Attorney filed as Exhibit 18(a) to 
Post-Effective Amendment No. 15 to Registrant's Registration Statement under the
Securities Act of 1933.

                                        /s/Sheldon R. Stein
                                      ----------------------
                                         Sheldon R. Stein,
                                         Attorney-in-Fact

                                       8
<PAGE>
 
                                 EXHIBIT INDEX
                                 -------------
                                        
1.   Declaration of Trust (incorporated by reference to Registrant's initial
     registration statement, August 1, 1986).

2.   By-Laws (incorporated by reference to Registrant's initial registration
     statement, August 1, 1986).

3.   Not Applicable.

4a.  Specimen Stock Certificate with respect to Ariel Growth Fund series
     (incorporated by reference to Registrant's Pre-Effective Amendment No. 2,
     November 4, 1986).

4b.  Specimen Stock Certificate with respect to Ariel Appreciation Fund series
     (incorporated by reference to Registrant's Post-Effective Amendment No. 7,
     December 29, 1989).

5a.  Investment Advisory Agreement with respect to Ariel Premier Bond Fund.

5b.  Sub-Advisory Agreement (incorporated by reference to Registrant's Post-
     Effective Amendment No. 15, June 6, 1995).

5c.  Administrative Services Agreement with respect to Ariel Premier Bond Fund.

6.   Underwriting Agreement (incorporated by reference to Registrant's Post-
     Effective Amendment No. 15, June 6, 1995).

7.   Not Applicable.

8.   Custodian Agreement (incorporated by reference to Registrant's Post-
     Effective Amendment No. 13, July 6, 1994).

9.   Transfer Agency Contract (incorporated by reference to Registrant's Post-
     Effective Amendment No. 13, July 6, 1994).
 
10.  Opinion and Consent of Counsel as to Legality of Shares Being Registered
     (incorporated by reference to Registrant's Post-Effective Amendment No.
     12).

11.  Not applicable.

12.  Not Applicable.

13.  Not Applicable.

14.  Retirement Plans (incorporated by reference to Registrant's Post-Effective
     Amendment No. 13, July 6, 1994).

15.  Rule 12b-1 Distribution Plan (incorporated by reference to Registrant's
     initial registration statement, August 1, 1986).

                                       9
<PAGE>
 
16.  Schedule for Computation of Performance Quotation (incorporated by
     reference to Registrant's Post-Effective Amendment No. 15, June 6, 1995).

17.  Not Applicable.
    
18a. Power of Attorney 

18b. Plan Pursuant to Rule 18f-3      

                                       10

<PAGE>

 
                                                                    EXHIBIT 5(a)

                         INVESTMENT ADVISORY AGREEMENT
                    WITH RESPECT TO ARIEL PREMIER BOND FUND

     INVESTMENT ADVISORY AGREEMENT, made this 15th day of August, 1995, by and
between ARIEL CAPITAL MANAGEMENT, INC., an Illinois corporation (the "Adviser"),
and ARIEL GROWTH FUND, a Massachusetts business trust, d/b/a ARIEL INVESTMENT
TRUST (the "Trust") with respect to the ARIEL PREMIER BOND FUND series of the
Trust (the "Fund").

     In consideration of the mutual covenants hereinafter set forth, IT IS
HEREBY AGREED between the parties as follows:

     1.  Employment of the Adviser.  The Trust hereby employs the Adviser to
         -------------------------                                          
manage the investment and reinvestment of the assets of the Fund, subject to the
supervision of the Trust's Board of Trustees on the terms hereinafter set forth.
The Adviser hereby accepts such employment and agrees during such period to
render the services herein set forth for the compensation herein provided.  The
Adviser shall for all purposes herein be deemed to be an independent contractor
and shall, except as expressly provided or authorized (whether herein or
otherwise), have no authority to act for or represent the Trust in any way or
otherwise be deemed an agent of the Trust.  Subject to the requirements of the
Investment Company Act of 1940 (the "1940 Act"), at the expense of the Adviser,
the Adviser may contract with any other person or persons to provide any of the
services to be provided pursuant to this Agreement, including the contracting of
services to be provided under paragraphs 2(a), 2(b), 2(c) and 2(d) hereunder to
a sub-adviser approved by the Trust in accordance with the 1940 Act, and shall
have the authority to direct the activities of such other person or persons in
the manner it deems appropriate.

     2.  Services to be Provided by the Adviser.  The Adviser undertakes to
         --------------------------------------                            
provide the following services and to assume the following obligations:

     a.  The Adviser shall see to the management of the investment and
reinvestment of the assets of the Fund, subject to and in accordance with the
investment objectives and policies of the Fund and any directions which the
Trust's Board of Trustees may issue from time to time.  In pursuance of the
foregoing, the Adviser shall make all determinations with respect to the
investment of the assets of the Fund and the purchase and sale of portfolio
securities and shall take such action necessary to implement the same.

     b.  The Adviser shall, in the name of the Trust, place orders for the
execution of the Fund's portfolio transactions in accordance with the policies
with respect thereto set forth in the Trust's registration statements under the
1940 Act and the Securities Act of 1933, as such registration statements may be
amended from time-to-time.
<PAGE>
 
     c.  The Adviser shall determine the manner in which voting rights, rights
to consent to corporate action, and any other rights pertaining to the Fund's
portfolio securities shall be exercised.

     d.  The Adviser shall render regular reports to the Trust's Board of
Trustees concerning the Fund's investment activities.

     e.  The Adviser shall be responsible for certain management services that
are necessary or desirable to the operation of the Fund.  Such services shall
consist of:  maintaining the Fund's organizational existence; providing office
space and personnel; preparing, filing and distributing notices, proxy
materials, reports to regulatory bodies, and reports to shareholders of the
Fund; maintaining portfolio and general accounting records; and other incidental
management services as are necessary to the conduct of the Fund's affairs except
such notices, materials, reports, records and services as are to be provided
under the Administrative Services Agreement in respect to the Fund.  In
connection with such services, the Adviser shall be responsible for creating and
maintaining necessary records of the Trust and of the Fund in accordance with
all applicable laws, rules and regulations, including but not limited to records
required by Section 31(a) of the Investment Company Act of 1940 (the "1940
Act").  All records shall be the property of the Trust and shall be available
for inspection and use by the SEC, the Trust or any person retained by the
Trust.  Where applicable, such records shall be maintained for the periods and
in the places required by Rule 31a-2 under the 1940 Act.

     3.  Expenses to be Paid by Adviser.  The Adviser shall pay all of the
         ------------------------------                                   
Fund's expenses other than interest, taxes, brokerage commissions, extraordinary
expenses (expenses which are not regular operating expenses such as expenses of
litigation including any indemnification of officers and directors as a result
of litigation), expenses of marketing and distribution of Fund shares as
permitted by Rule 12b-1 under the 1940 Act and expenses borne by the
Administrator under the Administrative Agreement.

     4.  Compensation of Adviser.
         ----------------------- 

     a.  As compensation for the services rendered and obligations assumed
hereunder by the Adviser, the Trust shall pay to the Adviser out of the assets
of the Fund within ten (10) days after the last day of each calendar month a fee
calculated on the basis of the value of average daily net assets of the Fund at
an annual rate as follows:

     Annual Rate        Value of Average Daily Net Assets of the Fund
     -----------        ---------------------------------------------

     0.43%        Less than $500 Million
     0.41%        $500 Million or more but less than $1 Billion
     0.39%        $1 Billion or more but less than $1.5 Billion
     0.37%        $1.5 Billion or more but less than $2 Billion
     0.35%        $2 Billion or more

                                       2
<PAGE>
 
     Such fee shall be computed and accrued daily.  Upon termination of this
Agreement before the end of any calendar month, the fee for such period shall be
prorated.  For purposes of calculating the fee of the Adviser, the daily value
of the Fund's net assets shall be computed by the same method as the Trust uses
to compute the value of net assets in connection with the determination of the
net asset value of the Fund's shares.

     b.  The Adviser may (i) waive all or a part of its fee and (ii) from its
own resources, incur distribution expenses including payments to brokers and
dealers in consideration of their promotional or administrative services.

     4.  Activities of the Adviser.  The services of the Adviser hereunder are
         -------------------------                                            
not to be deemed exclusive, and the Adviser shall be free to render similar
services to others.  It is understood that Trustees and officers of the Trust
are or may become interested in the Adviser as stockholders, officers or
otherwise, and that stockholders and officers of the Adviser are or may become
similarly interested in the Trust, and that the Adviser may become interested in
the Trust as a shareholder or otherwise.

     5.  Use of Names.  The Trust shall not use the name "Ariel" or the name of
         ------------                                                          
the Adviser in any prospectus, sales literature or other material relating to
the Trust or to the Fund in any manner not approved prior thereto by the
Adviser; provided, however, that the Adviser shall approve all uses of its name
which merely refer in accurate terms to its appointment hereunder or which are
required by the Securities and Exchange Commission or a State Securities
Commission; and, provided, further, that in no event shall such approval be
unreasonably withheld.  The Adviser shall not use the name of the Trust or of
the Fund in any material relating to the Adviser in any manner not approved
prior thereto by the Trust; provided, however, that the Trust shall approve all
uses of its name and of the name of the Fund which merely refer in accurate
terms to the appointment of the Adviser hereunder or which are required by the
SEC or a State Securities Commission; and, provided further, that in no event
shall such approval be unreasonably withheld.

     6.  Liability of the Adviser.  Absent willful misfeasance, bad faith, gross
         ------------------------                                               
negligence, or reckless disregard of obligations or duties hereunder on the part
of the Adviser, the Adviser shall not be subject to liability to the Trust or to
any shareholder of the Trust for any act or omission in the course of, or
connected with, rendering services hereunder or for any losses that may be
sustained in the purchase, holding or sale of any security.

                                       3
<PAGE>
 
     7.  Limitation of Trust's Liability.  The Adviser acknowledges that it has
         -------------------------------                                       
received notice of and accepts the limitations upon the Trust's liability set
forth in Article XI of its Declaration of Trust.  The Adviser agrees that the
Trust's obligations hereunder in any case shall be limited to the Trust and to
its assets and that the Adviser shall not seek satisfaction of any such
obligation from the shareholders of the Trust nor from any Trustee, officer,
employee or agent of the Trust.

     8.  Force Majeure.  The Adviser shall not be liable for delays or errors
         -------------                                                       
occurring by reason of circumstances beyond its control, including but not
limited to acts of civil or military authority, national emergencies, work
stoppages, fire, flood, catastrophe, acts of God, insurrection, war, riot, or
failure of communication or power supply.  In the event of equipment breakdowns
beyond its control, the Adviser shall take reasonable steps to minimize service
interruptions but shall have no liability with respect thereto.

     9.  Effectiveness, Renewal, Termination and Amendment.  This Agreement
         -------------------------------------------------                 
shall be effective as of the date hereof and continue for an initial term
through January 31, 1997 unless sooner terminated as hereinafter provided.  It
shall continue from year to year after the initial term as long as its
continuance is approved annually in accordance with the 1940 Act.  This
Agreement may be terminated at any time, without payment of any penalty, by the
Trust's Board of Trustees, or by a vote of the majority of the outstanding
voting securities of the Fund upon 60 days' prior written notice to the Adviser
and by the Adviser upon 60 days' prior written notice to the Trust.  This
Agreement may be amended as to the Fund at any time by the parties, subject to
approval by the Trust's Board of Trustees and, if required by law or applicable
SEC regulations, a vote of a majority of the outstanding voting securities of
the Fund.  This Agreement shall terminate automatically in the event of its
assignment.  The terms "assignment" and "vote of a majority of the outstanding
voting securities" shall have the meaning set forth in the 1940 Act.

     10.  Severability.  If any provision of this Agreement shall be held or
          ------------                                                      
made invalid by a court decision, statute, rule or otherwise, the remainder of
this Agreement shall not be affected thereby.

     11.  Miscellaneous.  This Agreement shall supersede the prior agreement
          -------------                                                     
between the parties provided for investment advisory services for the Fund.
Each party agrees to perform such further actions and execute such further
documents as are necessary to effectuate the purposes hereof.  This Agreement
shall be construed and enforced in accordance with and governed by the laws of
the State of Illinois.  The captions in this Agreement are included for
convenience only and in no way define or delimit any of the provisions hereof or
otherwise affect their construction or effect.

                                       4
<PAGE>
 
     IN WITNESS WHEREOF, the parties have duly executed this Agreement as of the
date first written above.

                                       ARIEL GROWTH FUND
                  
                  
                                       By: /s/Eric T. McKissack
                                       Title: President
                  
                  
                  
                                       ARIEL CAPITAL MANAGEMENT, INC.
                  

                                       By: /s/John W. Rogers
                                       Title: President

                                       5

<PAGE>

                                                                    EXHIBIT 5(c)

                       ADMINISTRATIVE SERVICES AGREEMENT
                    WITH RESPECT TO ARIEL PREMIER BOND FUND

     ADMINISTRATIVE SERVICES AGREEMENT, made as of the 15th day of August, 1995,
by and between ARIEL CAPITAL MANAGEMENT, INC., an Illinois corporation (the
"Administrator"), and ARIEL GROWTH FUND, a Massachusetts business trust doing
business as Ariel Investment Trust (the "Trust"), in respect to the series known
as ARIEL PREMIER BOND FUND (the "Fund").

     In consideration of the mutual covenants hereinafter set forth, it is
agreed as follows:

     1.  Employment of the Administrator.  The Trust hereby employs the
         --------------------------------                              
Administrator to perform certain administrative services for the Trust in
respect to the Fund, subject to the control and direction of the Trust's Board
of Trustees, for the period and on the terms hereinafter set forth. The
Administrator hereby accepts such employment and agrees during such period to
render the services and to assume the obligations herein set forth for the
compensation herein provided.  The Administrator shall for all purposes herein
be deemed to be an independent contractor and shall, except as expressly
provided or authorized (whether herein or otherwise), have no authority to act
for or represent the Trust in any way or otherwise be deemed an agent of the
Trust.

     2.  Obligations of and Services to be Provided by the  Administrator.  The
         ----------------------------------------------------------------      
Administrator undertakes to provide, arrange for or facilitate the following
services deemed necessary or desirable to the operation of the Fund and its
separate classes of shares:

     a.  transfer agency and shareholder servicing; preparing printing and
distributing notices, proxy materials, reports to regulatory bodies and reports
to shareholders related to a specific class; accounting servicing and accounting
records related to a specific class; state securities qualifications; Securities
and Exchange Commisson registrations; and shareholder meetings.  All records
shall be the property of the Trust and shall be available for inspection and use
by the SEC, the Trust or any person retained by the Trust.  Where applicable,
such records shall be maintained by the Administrator for the periods and in the
places required by Rule 31a-2 under the 1940 Act.

     b.  The Administrator may contract with any other person or persons to
provide any of the services to be provided pursuant to this Agreement under such
terms as it deems reasonable and shall have the authority to direct the
activities of such other person or persons in the manner it deems appropriate.
The Administrator shall bear the expenses of providing its services to the
Trust.  The Administrator also
<PAGE>
 
shall pay all of the Fund's expenses related to the services to be provided
under this Agreement, all fees and expenses of Trustees incurred as a result of
a matter solely related to one class of shares of the Fund and the Fund's
auditing and legal fees for professional services solely related to one class of
the shares of the Fund, provided, however that the Administrator shall not be
responsible to pay any of the legal or accounting fees or other expenses of the
Trust related to any litigation matter affecting the Fund.

     3.  Compensation of Administrator.
         ----------------------------- 

     a.  As compensation for the services rendered and obligations assumed
hereunder by the Administrator, the Trust shall pay to the Administrator out of
the assets of the Fund within ten (10) days after the last day of each calendar
month a fee calculated on the basis of average daily net assets of the
Institutional Class and Investor Class of the Fund, respectively, at an annual
rate as follows:

     Institutional Class:  0.15% if the total net assets of the class are less
     --------------------                                                     
     than $500 million; 0.125% if the total net assets of the class are $500
     million or more but are less than $1 billion; and 0.10% if the total net
     assets of the class are $1 billion or more.

     Investor Class:  0.25% if the total net assets of the class are less than
     ---------------                                                          
     $1 billion; 0.225% if the total net assets of the class are $1 billion or
     more but are less than $2 billion; and 0.20% if the total net assets of the
     class are $2 billion or more.

     Such fee shall be computed and accrued daily.  Upon termination of this
Agreement before the end of any calendar month, the fee for such period shall be
prorated.  For purposes of calculating the fee of the Administrator, the daily
value of the Fund's net assets shall be computed by the same method as the Trust
uses to compute the value of net assets in connection with the determination of
the net asset value of the Fund's shares.

          b.   The Administrator may (i) waive all or a part of its fee and (ii)
from its own resources, incur distribution expenses including payments to
brokers and dealers in consideration of their promotional or administrative
services.

                                       2
<PAGE>
 
     4.   Activities of the Administrator.  The services of the Administrator
          -------------------------------                                    
hereunder are not to be deemed exclusive, and the Administrator shall be free to
render similar services to others.  It is understood that Trustees and officers
of the Trust are or may become interested in the Administrator as stockholders,
officers or otherwise, and that stockholders and officers of the Administrator
are or may become similarly interested in the Trust, and that the Administrator
may become interested in the Trust as a shareholder or otherwise.

     5.   Use of Names.  The Trust shall not use the name Ariel or the name of
          ------------                                                        
the Administrator in any prospectus, Statement of Additional Information, sales
literature or other material relating to the Trust or to any Fund in any manner
not approved prior thereto by the Administrator; provided, however, that the
Administrator shall approve all uses of its name which merely refer in accurate
terms to its appointment hereunder or which are required by the SEC or a State
Securities Commission; and, provided, further, that in no event shall such
approval be unreasonably withheld.  The Administrator shall not use the name of
the Trust or of any Fund in any material relating to the Administrator in any
manner not approved prior thereto by the Trust; provided, however, that the
Trust shall approve all uses of its name and of the name of any Fund which
merely refer in accurate terms to the appointment of the Administrator hereunder
or which are required by the Securities and Exchange Commission or a State
Securities Commission; and, provided further, that in no event shall such
approval be unreasonably withheld.

     6.   Liability of the Administrator.  Absent willful misfeasance, bad
          ------------------------------                                  
faith, gross negligence, or reckless disregard of obligations or duties
hereunder on the part of the Administrator, the Administrator shall not be
subject to liability to the Trust or to any shareholder of the Trust for any act
or omission in the course of, or connected with, rendering services hereunder or
for any losses that may be sustained in the purchase, holding or sale of any
security.

     7.   Limitation of Trust's Liability.  The Administrator acknowledges that
          -------------------------------                                      
it has received notice of and accepts the limitations upon the Trust's liability
set forth in Article XI of its Declaration of Trust.  The Administrator agrees
that the Trust's obligations hereunder in any case shall be limited to the Trust
and to its assets (or the assets of the Fund) and that the Administrator shall
not seek satisfaction of any such obligation from the shareholders of the Trust
nor from any Trustee, officer, employee or agent of the Trust.

                                       3
<PAGE>
 
     8.   Force Majeure.  The Administrator shall not be liable for delays or
          -------------                                                      
errors occurring by reason of circumstances beyond its control, including but
not limited to acts of civil or military authority, national emergencies, work
stoppages, fire, flood, catastrophe, acts of God, insurrection, war, riot, or
failure of communication or power supply.  In the event of equipment breakdowns
beyond its control, the Administrator shall take reasonable steps to minimize
service interruptions but shall have no liability with respect thereto.

     9.   Effectiveness, Renewal, Termination and Amendment.  This Agreement
          -------------------------------------------------                 
shall be effective as of the date hereof and continue for an initial term
through January 31, 1997 unless sooner terminated as hereinafter provided.  It
shall continue from year to year after the initial term as long as its
continuance is approved annually in accordance with the 1940 Act.  This
Agreement may be terminated at any time, without payment of any penalty, by the
Trust's Board of Trustees, or by a vote of the majority of the outstanding
voting securities of the Fund upon 60 days' prior written notice to the
Administrator and by the Administrator upon 60 days' prior written notice to the
Trust.  This Agreement may be amended as to the Fund at any time by the parties,
subject to approval by the Trust's Board of Trustees and, if required by law or
applicable SEC regulations, a vote of a majority of the outstanding voting
securities of the Fund.  This Agreement shall terminate automatically in the
event of its assignment.  The terms "assignment" and "vote of a majority of the
outstanding voting securities" shall have the meaning set forth in the 1940 Act.

     10.  Severability.  If any provision of this Agreement shall be held or
          ------------                                                      
made invalid by a court decision, statute, rule or otherwise, the remainder of
this Agreement shall not be affected thereby.

     11.  Miscellaneous.  This Agreement shall supersede prior agreements
          -------------                                                  
between the parties related to the Administrator performing any of the services
and assuming any of the obligations it assumed hereunder.  Each party agrees to
perform such further actions and execute such further documents as are necessary
to effectuate the purposes hereof.  This Agreement shall be construed and
enforced in accordance with and governed by the laws of the State of Illinois.
The captions in this Agreement are included for convenience only and in no way
define or delimit any of the provisions hereof or otherwise affect their
construction or effect.

                                       4
<PAGE>
 
     IN WITNESS WHEREOF, the parties have duly executed this Agreement as of the
date first written above.


                         ARIEL GROWTH FUND


                         By: /s/Eric T. McKissack
                             ------------------------
                         Title: President



                         ARIEL CAPITAL MANAGEMENT, INC.


                         By: /s/John W. Rogers
                         Title: President

                                       5

<PAGE>
 
                                                                   EXHIBIT 18(a)

                               ARIEL GROWTH FUND


                               POWER OF ATTORNEY

     KNOW ALL PEOPLE BY THESE PRESENTS, that the undersigned, on behalf of Ariel
Growth Fund, constitutes and appoints Sheldon R. Stein, Arthur Don, John W.
Rogers, Jr., Mellody Hobson and Roger P. Schmitt, and each of them, his or her
attorneys-in fact, each with the power of substitution, for it in any and all
capacities, to sign any post-effective amendments to the registration statement
under the Securities Act of 1933 (Registration No. 33-7699) and/or the
Investment Company Act of 1940 (Registration No. 811-4786), whether on Form N-1A
or any successor forms thereof, and to file the same, with exhibits thereto and
other documents in connection therewith, with the Securities and Exchange
Commission and all appropriate state or federal regulatory authorities.  The
undersigned hereby ratifies and confirms all that each of the aforenamed
attorneys-in-fact, or his or her substitute or substitutes, may do or cause to
be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney as
of the 15th day of August, 1995.



                                        /s/Eric T. McKissack
                                        --------------------------
                                        Eric T. McKissack,
                                        President


     The undersigned certifies that the following resolution was adopted by the 
Board of Trustees of Ariel Growth Fund (doing business as Ariel Investment 
Trust) on August 15, 1995:

     RESOLVED, that the President or any Vice President of Ariel Growth Fund 
(doing business as Ariel Investment Trust)(the "Trust") be and each of them 
hereby is authorized to execute on behalf of the Trust a power of attorney, 
substantially in the form attached hereto as Exhibit A, in connection with the 
filing of any post-effective amendment to the registration statement under the 
Securities Act of 1933 (Registration No. 33-7699) and/or the Investment Company 
Act of 1940 (Registration No. 811-4786), whether on Form N-1A or any successor 
forms thereof, and to file the same, with exhibits thereto and other documents 
in connection therewith, with the Securities and Exchange Commission and any 
other governmental regulatory authority.


Dated: August 25, 1995



                                        /s/Roger P. Schmitt
                                        ------------------------------
                                        Roger P. Schmitt, Secretary

<PAGE>
 
                                                                   EXHIBIT 18(b)

                Ariel Growth Fund, d/b/a Ariel Investment Trust
          Plan Pursuant to Rule 18f-3 for the Ariel Premier Bond Fund
          -----------------------------------------------------------
                          As Amended, August 15, 1995

     Ariel Growth Fund, d/b/a Ariel Investment Trust (the "Trust") may offer
different classes of shares of its Ariel Premier Bond Fund series pursuant to
Rule 18f-3 under the Investment Company Act of 1940 (the "Act") under the
following Plan.

     1.  The current Plan for the Ariel Premier Bond Fund (the "Fund")
encompasses two classes of shares that may be offered as follows:

     (a) Institutional Class shares will be sold and redeemed at net asset
value.  Except for the issuance of the initial organizational shares, the
minimum initial investment for the Institutional Class is $1,000,000, subject to
modification by the Board of Trustees.  The minimum initial investment
requirement may be waived at the discretion of the investment adviser or
principal underwriter under circumstances in which the investment adviser or
principal underwriter anticipates that the account will reach at least
$1,000,000 in a reasonable period of time.  Institutional Class shares are not
subject to Rule 12b-1 distribution fees.

     (b) Investor Class shares will be sold and redeemed at net asset value.
Investor Class is a "retail" class.  Except for the issuance of the initial
organizational shares and retirement accounts, the minimum initial investment
for the Investor Class is $1,000, subject to modification by the Board of
Trustees.  The minimum initial investment requirement may be waived at the
discretion of the investment adviser or principal underwriter.  Investor Class
shares are subject to Rule 12b-1 fees at an annual rate of 0.25% of the average
daily net assets attributable to such shares.

     (c) The Trust pays a fee under an Administrative Services Agreement
involving services to be performed and expenses to be assumed by the
Administrator which are expected to differ by class.  Under the Administrative
Services Agreement, the fees paid to the administrator are based on average
daily net assets at an annual rate as follows:

     Institutional Class:  0.15% if the total assets of the class are less than
     $500 million; 0.125% if the total assets of the class are $500 million or
     more but are less than $1 billion; and 0.10% if the total assets of the
     class are $1 billion or more.

     Investor Class:  0.25% if the total assets of the class are less than $1
     billion; 0.225% if the total assets of the class are $1 billion or more but
     are less than $2 billion; and 0.20% if the total assets of the class are $2
     billion or more.
<PAGE>
 
     (d) Shares of either class may be exchanged, or issued in exchange for,
shares of the other class or for shares of Ariel Growth Fund or Ariel
Appreciation Fund (other single class series of Ariel Investment Trust) or for
shares of any money market mutual fund approved by the Board of Trustees for
such exchange privilege, at relative net asset values provided that after the
exchange, the value of the account in the class or fund into which the exchange
is made meets the minimum initial investment requirement for such class or fund.
Shares of each class may be redeemed at the option of the Trust if by reason of
redemption the shareholder account falls below a minimum value from time to time
determined by the Trustees (and set forth in the applicable prospectus), which
minimum value may vary between the classes.  The minimum value is currently
$1,000,000 for Institutional Class shares and $1,000 for Investor Class shares.
Exchange privileges for an account may be terminated if excessive use is made,
i.e., more than five exchanges from any fund per calendar year.  The privilege
may be generally modified or terminated upon mailing to shareholders at their
addresses of record 60 or more days before such notice is effective.

     (e) Shares of either class may be redeemed in kind subject to the
requirements of Rule 18f-1 under the Act and subject to any further restriction
or prohibition under any state blue sky law.

     2.   Income, realized and unrealized capital gains and losses, and expenses
to be paid by the Fund and not allocated to a particular class as provided
below, shall be allocated to each class on the basis of relative net assets.

     Under the Investment Advisory and Administrative Services Agreements the
investment adviser and administrator pays all of the expenses of the Fund except
interest, taxes, brokerage commissions, extraordinary expenses (expenses which
are not regular operating expenses such as expenses of litigation including any
indemnification of officers and directors as a result of litigation) and
expenses of marketing and distribution of Fund shares as permitted by Rule 12b-1
under the Act.

     The only expenses to be allocated to a specific class are those incurred
solely by or for such class.  It is anticipated that the only expenses that
would be paid by the Trust out of the assets of the Fund and allocated to each
class other than on the basis of relative net assets of each class are Rule 12b-
1 expenses of the Investor Class (described in 1(b) above), the fees paid under
the Administrative Services Agreement (described in 1(c) above) and
extraordinary expenses related to a specific class such as litigation solely
related to a particular class.

     3.   Each class will vote separately with respect to any matter as required
by applicable law or which separately affects that class.  The shares of each
class have one vote per share and a pro-rata fractional vote for a fraction of a
share.

                                       2


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