WILLIAM BLAIR MUTUAL FUNDS INC
485BPOS, 1997-06-17
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<PAGE>   1
   
As filed with the Securities and Exchange           Registration Nos. 33-17463  
Commission on or about June 17, 1997                                  811-5344 
             

                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                   FORM N-1A

                             REGISTRATION STATEMENT
                       UNDER THE SECURITIES ACT OF 1933
                                                                ------
     [ ]              Pre-Effective Amendment No.  ------
                                                                ------
     [ ]            Post-Effective Amendment No.     17           X 
                                                  ------        ------
                                     and/or

                             REGISTRATION STATEMENT
                    UNDER THE INVESTMENT COMPANY ACT OF 1940
                     
                           Amendment No.   18                     X 
                                          ------                ------
                        WILLIAM BLAIR MUTUAL FUNDS, INC.
               (Exact Name of Registrant as Specified in Charter)

                             222 West Adams Street
                            Chicago, Illinois  60606
              (Address of Principal Executive Offices)  (Zip Code)

       Registrant's Telephone Number, Including Area Code: (312) 364-8000

                                             Copy to:                         
Rocky Barber                                 Charles F. Custer, Esquire       
222 West Adams Street                        Vedder, Price, Kaufman & Kammholz
Chicago, Illinois  60606                     222 North LaSalle Street         
(Name and Address of Agent for Service)      Chicago, Illinois                
    

                            ---------------------
          
   
Pursuant to Rule 24f-2 of the Investment Company Act of 1940, the Registrant
has registered an indefinite amount of capital stock under the Securities Act
of 1933.  The Rule 24f-2 Notice for the fiscal year ended December 31, 1996 was
filed on or about February 27, 1997.
    
It is proposed that this filing will become effective (check appropriate box)


   [x]     immediately upon filing pursuant to paragraph (b); or

   [ ]     on (date) pursuant to paragraph (b); or

   [ ]     60 days after filing pursuant to paragraph (a)(1); or

   [ ]     on May 1, 1997 pursuant to paragraph (a)(1); or

   [ ]     75 days after filing pursuant to paragraph (a)(2); or

   [ ]     on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

   [ ]     this post-effective amendment designates a new effective date for a
           previously filed post-effective amendment.






<PAGE>   2


                                      NOTE
   
The purpose of this filing is to fulfill the Registrant's undertaking pursuant
to Item 32(b) of Form N-1A regarding the Value Discovery Fund.
    




<PAGE>   3

                        WILLIAM BLAIR MUTUAL FUNDS, INC.

                             CROSS REFERENCE SHEET


<TABLE>
<CAPTION>
Item No. of Form N-1A                                               Caption
<S>                                                                 <C>
Part A                                                              Prospectus

1         . .  . . . .  . . . . . . . . . . . . . . . . .           Cover page
                                                                     
2         . . . . . . . . . . . . . . . . . . . . . . . .           Fund Expenses
   
3         . . . . . . . . . . . . . . . . . . . . . . . .           Financial Highlights; Supplement to Prospectus
    
4         . . . . . . . . . . . . . . . . . . . . . . . .           Growth Fund; Value Discovery Fund; International Growth Fund; 
                                                                    Income Fund; Ready Reserves Fund

5         . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund

5A        . . . . . . . . . . . . . . . . . . . . . . . .           Inapplicable

6         . . . . . . . . . . . . . . . . . . . . . . . .           Shareholder Services and Rights; Dividend and Distribution 
                                                                    Policy; Other Important Information; back cover

7         . . . . . . . . . . . . . . . . . . . . . . . .           How to Buy; How to Sell; Exchanges; Shareholder Services and 
                                                                    Rights; Determination of Net Asset Value

8         . . . . . . . . . . . . . . . . . . . . . . . .           How to Sell; Exchanges; Shareholder Services and Rights; 
                                                                    Other Important Information

9         . . . . . . . . . . . . . . . . . . . . . . . .           Inapplicable
   
    


</TABLE>





<PAGE>   4
   
<TABLE>
<CAPTION>         

Item No. of Form N-1A                                               Caption
<S>                                                                 <C>
Part B                                                              Statement of Additional Information

10        . . . . . . . . . . . . . . . . . . . . . . . .           Cover Page

11        . . . . . . . . . . . . . . . . . . . . . . . .           Table of Contents
                                                              

12        . . . . . . . . . . . . . . . . . . . . . . . .           Inapplicable

13        . . . . . . . . . . . . . . . . . . . . . . . .           Investment Policies and Restrictions; Investment Practices; 
                                                                    Appendix A; Appendix B

14        . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund

15        . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund

16        . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund; General Fund Information

17        . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund

18        . . . . . . . . . . . . . . . . . . . . . . . .           Shareholder Rights

19        . . . . . . . . . . . . . . . . . . . . . . . .           General Fund Information

20        . . . . . . . . . . . . . . . . . . . . . . . .           General Fund Information

21        . . . . . . . . . . . . . . . . . . . . . . . .           Management of the Fund

22        . . . . . . . . . . . . . . . . . . . . . . . .           Performance

23        . . . . . . . . . . . . . . . . . . . . . . . .           Financial Information of the Fund; Supplement to Statement of 
                                                                    Additional Information
    
</TABLE>





<PAGE>   5

Part C                                              Other Information


Information required to be included in Part C is set forth under the
appropriate Item, so numbered, in Part C to this Registration Statement.





<PAGE>   6
   
The following information supplements the Prospectus for William Blair Mutual 
Funds, Inc. Please file this Prospectus Supplement with your records.


                        WILLIAM BLAIR MUTUAL FUNDS, INC.
                   Supplement to Prospectus dated May 1, 1997

Financial Highlights
(For each share of the Fund outstanding throughout the period)

The following Financial Highlights for the Value Discovery Fund are based upon
the unaudited period from January 1 through May 31, 1997 and the fiscal period
ended December 31, 1996.






<TABLE>
<CAPTION>
                                                      FOR THE PERIOD
                                                       FROM JANUARY 1                  PERIOD ENDED
                                                     THROUGH MAY 31, 1997(a)     DECEMBER 31, 1996(b)(c)                 
<S>                                                  <C>                         <C>

Net asset value, beginning of period                     $10.000                        $10.000
              
Income from investment operations:

     Net investment income                                  .044                              -
                                                                                                
     Net realized and unrealized gain on investments        .446                              -
                                                                                                    
Total from investment operations                            .490                              -  
                                                                                                
Less distributions from:                                                                        
                                                                                                
     Net investment income                                    -                               -
     Net realized gain on investments                         -                               -
                                                                                                
Total distributions                                           -                               -
                   
Net asset value, end of period                          $10.490                         $10.000
Total return (%)                                           4.90
Ratios to average net asset (%):
     Expenses (d)                                          1.50
     Net investment income (d)                             1.24
Supplemental data:
     Net assets at end of period (000s)                 $18,839                              $2
Portfolio turnover rate (%)                                  28
Average Commission Rate                                   $0.06
</TABLE>
- ---------------
(a)  Ratios are annualized except total return for periods less than one year.
(b)  December 23, 1996 (Commencement of Operations) to December 31, 1996.
(c)  Audited.





<PAGE>   7

 (d)  Without the waiver of expenses in 1997, the expense ratio
      would have been 1.85% and the net investment income ratio
      would have been .87%.

                 The date of this supplement is June 17, 1997.

    



<PAGE>   8


PROSPECTUS / MAY 1, 1997       

WILLIAM BLAIR
MUTUAL FUNDS, INC.
- ----------------------------


GROWTH FUND
- ----------------------------

VALUE DISCOVERY FUND
- ----------------------------

INTERNATIONAL GROWTH FUND
- ----------------------------

INCOME FUND
- ----------------------------

READY RESERVES FUND
- ----------------------------

This prospectus contains important information about the individual portfolios,
including their investment objectives.  For your benefit and protection, please
read it before you invest, and keep it for future reference.

An investment in the Fund is neither insured nor guaranteed by the U.S.
Government and there can be no assurance that the Ready Reserves Fund will be
able to maintain a stable $1.00 share price.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.


William Blair Mutual Funds, Inc.
222 West Adams Street
Chicago, Illinois 060606
<PAGE>   9
TABLE OF
CONTENTS
<TABLE>
         <S>                                                                                                           <C>
         OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

         FUND EXPENSES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

         FINANCIAL HIGHLIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
                 GROWTH FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
                 VALUE DISCOVERY FUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
                 INTERNATIONAL GROWTH FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
                 INCOME FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
                 READY RESERVES FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

         GROWTH FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

         VALUE DISCOVERY FUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

         INTERNATIONAL GROWTH FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11

         INCOME FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15

         READY RESERVES FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  17

         YOUR ACCOUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
                 How to Buy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
                 How to Sell  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
                 Exchanges  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                 Shareholder Services and Rights  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
                 Dividend and Distribution Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
                 Taxes  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
                 Determination of Net Asset Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
                 Other Important Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30

         MANAGEMENT OF THE FUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31

         PERFORMANCE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

         INVESTMENT GLOSSARY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

         FOR MORE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
</TABLE>


<PAGE>   10
OVERVIEW -

William Blair Mutual Funds, Inc. (the "Fund") is a no-load, open-end
diversified mutual fund consisting of five portfolios, each with its own
investment objective and policies.  Each portfolio is managed by the investment
professionals of William Blair & Company, L.L.C. (the "Adviser"), an investment
adviser with over $7.8 billion in assets under management.

For most purposes, each portfolio operates like a separate mutual fund. Each
portfolio has its own goal, strategy and risk/reward profile. The Growth Fund,
the Value Discovery Fund and the International Growth Fund each invest
primarily in equity securities for long-term capital appreciation. Therefore,
they may be more appropriate investments for individuals with longer time
horizons and who are willing to accept higher short-term risk along with higher
potential long-term returns.  The Income Fund invests primarily in bonds and
may be more appropriate for individuals with a shorter time horizon and who are
seeking income.  The Ready Reserves Fund invests in money market securities,
which are short-term instruments and generally provide a lower level of income
than bonds, but also provide a low degree of volatility.

There can be no assurance that a portfolio will meet its investment objective.
Like all investments, each portfolio is subject to market fluctuations and
financial risks. Because you could lose money by investing in these portfolios,
be sure to read all the information carefully before investing.

The next several pages contain information on the expenses associated with an
investment in each portfolio, as well as financial highlights for all
portfolios.  Following the discussion of Fund expenses is concise information
on each of the portfolios, as follows:
<TABLE>
  <S>                          <C>
  -GOAL AND STRATEGY           the portfolio's investment objective and the method by which it will pursue its
                               goal

- ----------------------------------------------------------------------------------------------------------------
  -PORTFOLIO SECURITIES        the primary types of securities in which the portfolio invests
                               (Certain investments, policies and techniques are described more fully in the
                               "Investment Glossary" at the end of the prospectus.)
- ----------------------------------------------------------------------------------------------------------------
  -RISK FACTORS                the major risks associated with investing in the portfolio
- ----------------------------------------------------------------------------------------------------------------
  -PORTFOLIO                   the individuals assigned by the investment adviser to handle the day-to-day
   MANAGEMENT                  management of the portfolio
</TABLE>
<PAGE>   11
FUND EXPENSES -
William Blair Mutual Funds are no-load, which means you do not pay a sales
charge.

<TABLE>
<S>                                                                 <C>
Shareholder transaction expenses for William Blair Mutual Funds
- ---------------------------------------------------------------
Maximum sales load imposed on purchases                             NONE
Maximum sales load imposed on reinvestments                         NONE
Deferred sales load                                                 NONE
Redemption fee                                                      NONE
</TABLE>


Annual Fund operating expenses 
- ------------------------------
(as a percentage of average daily net assets)


Fund investors pay various expenses, either directly or indirectly.  This table
shows the expenses for the past year, adjusted to reflect any reimbursements.
Future expenses may be greater or less.
<TABLE>
<CAPTION>
                                                   
                                          Value   International           Ready
                               Growth   Discovery    Growth     Income   Reserves
                              ---------------------------------------------------
 <S>                          <C>        <C>         <C>         <C>      <C>
 Management fee                  .68%    1.15%       1.10%       .58%     .60%
 Other expenses                  .11      .35*        .34        .12      .11

 12b-1 fee                      None      None        None       None      None
                                ----      ----        ----       ----      ----
 Total Fund operating
 expenses                        .79%    1.50%*      1.44%       .70%     .71%
                                 ===     ====        ====        ===      === 
</TABLE>

*After expense reimbursement. The Value Discovery Fund commenced operations on
December 23, 1996; therefore, "other expenses" are based upon the annualized
estimates for the current fiscal year, after reimbursement.  During the
portfolio's first year of operations, the Adviser has agreed to voluntarily
absorb total operating expenses that exceed 1.50% of the portfolio's average
daily net assets. Without the Adviser's voluntary absorption of expenses, the
portfolio's other expenses and total operating expenses are estimated to be
 .80% and 1.95%, respectively.

Example:  The purpose of this example is to assist you in understanding the
various costs and expenses that an investor in a portfolio may bear directly or
indirectly.

This table shows what you would pay if you invested $1,000 over the various
time frames indicated.  The example assumes you reinvested all dividends and
that the average annual return was 5%.

<TABLE>
<CAPTION>
                               1 Year      3 Years      5 Years     10 Years
<S>                             <C>        <C>          <C>          <C>
GROWTH                          $ 8        $25          $44          $  98

VALUE DISCOVERY                 $15        $47           --             --

INTERNATIONAL GROWTH            $15        $46          $79          $ 174

INCOME                          $ 7        $22          $39          $  87

READY RESERVES                  $ 7        $23          $40          $  89
</TABLE>

THE EXAMPLE IS FOR COMPARISON PURPOSES ONLY AND IS NOT A REPRESENTATION OF A
PORTFOLIO'S ACTUAL EXPENSES AND RETURNS, EITHER PAST OR FUTURE.  IT IS BASED
UPON THE ANNUAL FUND OPERATING EXPENSES SHOWN ABOVE.   FIGURES ARE SHOWN FOR
THE VALUE DISCOVERY FUND FOR THE ONE- AND THREE-YEAR PERIODS ONLY BECAUSE IT IS
A NEW PORTFOLIO.


                                       2
<PAGE>   12
FINANCIAL HIGHLIGHTS -

The figures below for the periods ended December 31, which is each portfolio's 
year end, were audited by the Fund's independent auditors.

GROWTH FUND
<TABLE>
<CAPTION>
                                                                           Years Ended December 31
                                              ----------------------------------------------------------------------------------
                                              1996     1995     1994     1993     1992    1991    1990     1989    1988     1987
                                              ----     ----     ----     ----     ----    ----    ----     ----    ----     ----
<S>                                         <C>      <C>      <C>      <C>      <C>      <C>     <C>      <C>     <C>     <C>
Net asset value, beginning of period        $ 11.900 $  9.600 $  9.730 $  9.390 $  9.490 $ 6.970 $ 7.840  $ 7.810 $ 8.210 $ 9.100
Income from investment
operations:
  Net investment income                        (.010)    .034     .027     .035     .045    .070    .131     .125    .126    .148
  Net realized and unrealized gain (loss)
      on investments                           2.144    2.750     .581    1.389     .671   2.970   (.287)   2.178    .433    .839
                                            -------- -------- -------- -------- -------- ------- -------  ------- ------- -------
Total from investment operations               2.134    2.784     .608    1.424     .716   3.040   (.156)   2.303    .559    .616
Less distributions from:
  Net investment income                         .010     .030     .025     .035     .047    .070    .130     .130    .160    .135
  Net realized gain on investments              .544     .454     .713    1.049     .769    .450    .584    2.143    .799   1.371
                                            -------- -------- -------- -------- -------- ------- -------  ------- ------- -------
Total distributions                             .544     .484     .738    1.084     .816    .520    .714    2.273    .959   1.506
                                            -------- -------- -------- -------- -------- ------- -------  ------- ------- -------
Net asset value, end of period              $ 13.480 $ 11.900 $  9.600 $  9.730 $  9.390 $ 9.490 $ 6.970  $ 7.840 $ 7.810 $ 8.210
                                            ======== ======== ======== ======== ======== ======= =======  ======= ======= =======
Total return (%)                               17.99    29.07     6.45    15.51     7.61   44.37   (2.02)   30.45    7.12    7.99
Ratios to average net assets (%):
  Expenses                                       .78      .65      .71      .78      .83     .90     .87      .91     .92     .87
  Net investment income (loss)                  (.03)     .34      .32      .38     1.34     .83    1.70     1.36    1.46    1.46
Supplemental data:
  Net assets at end of period (000s)        $501,774 $363,036 $217,560 $150,046 $111,082 $91,433 $62,898  $67,421 $59,767 $66,279
  Portfolio turnover rate (%)                     43       32       46       55       27      33      34       34      18      22
  Average Commission Rate                   $  .0621       --       --       --       --      --      --       --      --      --


</TABLE>

VALUE DISCOVERY FUND

<TABLE>
<CAPTION>
                                       Period Ended December 31, 1996(a)
                                       -------------------------------
<S>                                               <C>
Net asset value, beginning of period              $  10.000

Income from investment operations:
  Net investment income                                   -
  Net realized and unrealized gain                         
     on investments                                       -
Total from investment operations                          -
Less distributions from:
  Net investment income                                   -
  Net realized gain on investments                        -
Total distributions                                       -
Net asset value, end of period                    $  10.000
                                                  =========
Total return (%)
Ratios to average net assets (%):
  Expenses                                                -
  Net investment income                                   -
Supplemental data:
  Net assets at end of period (000s)              $       2
  Portfolio turnover rate (%)                             -

</TABLE>

- ----------------------
(a) For the period December 23, 1996 (Commencement of Operations) to 
    December 31, 1996.


                                       3
<PAGE>   13
INTERNATIONAL GROWTH FUND
<TABLE>
<CAPTION>
                                                                   Years ended December 31               Period Ended
                                                   ---------------------------------------------------    December 31,
                                                     1996          1995          1994          1993       1992(a)(b)
                                                     ----          ----          ----          ----       ----------
<S>                                                <C>          <C>            <C>            <C>           <C>
Net asset value, beginning of period               $ 13.120     $  12.360      $  13.180      $ 10.130      $ 10.000
Income from investment operations:
   Net investment income (loss)                        .029          .105          0.016         0.008        (0.011)
   Net realized and unrealized gain (loss) on
      investments, foreign currency and
      other assets and liabilities                    1.299          .758         (0.025)        3.401         0.141
                                                   --------     ---------      ---------      --------      --------
Total from investment operations                      1.328          .890         (0.009)        3.409         0.130
Less distributions from:

   Net investment income                               .068(c)       .130(c)       0.024            --            --
   Net realized gain on investments                    .430            --          0.714         0.359            --
   Tax return of capital                                 --            --          0.073            --            --
                                                   --------     ---------      ---------      --------      --------
Total distributions                                    .498          .130          0.811         0.359            --
                                                   --------     ---------      ---------      --------      --------
Net asset value, end of period                     $ 13.950     $  13.120      $  12.360      $ 13.180      $ 10.130
                                                   ========     =========      =========      ========      ========
Total return (%)                                      10.20          7.22           (.04)        33.65          1.30
Ratios to average net assets (%)
   Expenses (e)                                        1.44          1.48           1.51          1.71          1.88
   Net investment income (loss) (d)                     .19           .87            .15           .11          (.56)

Supplemental data:
   Net assets at end of period (000s)              $105,148     $  89,762      $  70,403      $ 40,298      $ 10,767
   Portfolio turnover rate (%)                           89            77             40            83             5
   Average Commission Rate(e)                      $  .0051            --             --            --            --
                                                                                                                     
                                                                                
</TABLE>

(a)      Ratios are annualized except total return for period less than one
         year.
(b)      For the period from October 1, 1992 (Commencement of Operations) to
         December 31, 1992.
(c)      Includes $.022 and $.061 in passive foreign investment company
         transactions which are treated as ordinary income for Federal income
         tax purposes for 1996 and 1995, respectively.
(d)      Without the waiver of expenses in 1993 and 1992, the expense ratios
         would have been 2.08% and 2.55% and the net investment ratios would
         have been (.25)% and (1.22)%, respectively.
(e)      Foreign commissions usually are lower than U.S. commissions when 
         expressed as cents per share due to the lower per share prices of many
         non-U.S. securities.

INCOME FUND
<TABLE>
<CAPTION>
                                                                      Years Ended December 31                     
                                                                                                                    Period Ended
                                                    ---------------------------------------------------------------  December 31,
                                                       1996       1995       1994      1993       1992      1991     1990(a)(b)
                                                       ----       ----       ----      ----       ----      ----      ----------
<S>                                                 <C>         <C>      <C>        <C>         <C>        <C>         <C> 
Net asset value, beginning of period                 $  10.570  $  9.850  $  10.580  $  10.600  $   10.770  $  10.200  $  10.000
Income from investment operations:                                                                           
   Net investment income                                  .619      .646       .661       .651        .832        .95       .164
   Net realized and unrealized gain (loss)
     on investments                                      (.309)     .732      (.741)      .159       (.089)      .638       .126
                                                     ---------  --------  ---------  ---------   ---------  ---------  ---------
Total from investment operations                          .310     1.378      (.080)      .810        .743      1.583       .290
Less distributions from:
   Net investment income                                  .610      .658       .646       .651        .827       .870       .090
   Net realized gain on investments                         --        --       .004       .179        .086       .143         --
                                                     ---------  --------  ---------  ---------   ---------  ---------  ---------
Total distributions                                       .610      .658       .650       .830        .913      1.013       .090
                                                     ---------  --------  ---------  ---------   ---------  ---------  ---------
Net asset value, end of period                       $  10.270  $ 10.570  $   9.850  $  10.580  $   10.600  $  10.770  $  10.200
                                                     =========  ========  =========  =========   =========  =========  =========
Total return (%)                                          3.07     14.37       (.74)      7.82        7.17      16.47       2.91
Ratios to average net assets (%):
   Expenses (c)                                            .70       .68        .68        .70         .88        .92        .74
   Net investment income (c)                              5.97      6.24       6.33       5.96        7.69       8.33       8.39
   Supplemental data:
   Net assets at end of period (000s)                $ 150,006  $147,370  $ 143,790  $ 204,381  $  136,896  $  83,041  $  22,899
   Portfolio turnover rate (%)                              68        54         63        114          47         64        159

</TABLE>
- ----------------------

(a)      Ratios are annualized except total return for period less than one 
         year.
(b)      For the period from September 25, 1990 (Commencement of Operations) to
         December 31, 1990.
(c)      Without the waiver of expenses in 1991 and 1990, the expense ratios
         would have been 1.06% and 1.22% and the net investment income ratios
         would have been 8.19% and 7.67%, respectively.





                                       4
<PAGE>   14
READY RESERVES FUND
<TABLE>
<CAPTION>
                                                                    Years Ended December 31                     Period Ended
                                            ----------------------------------------------------------------    December 31
                                              1996    1995    1994    1993    1992    1991    1990    1989      1988(a) (b)
                                              ----    ----    ----    ----    ----    ----    ----    ----    ------------------
<S>                                       <C>      <C>      <C>        <C>       <C>       <C>       <C>      <C>      <C>
Net asset value, beginning of period      $ 1.0000 $ 1.0000 $ 1.0000   $ 1.0000  $ 1.0000  $ 1.0000  $ 1.0000 $ 1.0000 $ 1.0000
Income from investment operations:
   Net investment income                     .0478    .0530    .0361      .0261     .0327     .0551     .0755    .0848    .0399
   Net realized and unrealized gain      
   (loss) on investments                         _        _   (.0026)         _         _         _         _        _        _
                                           -------  -------  -------    -------  --------   -------    ------   ------  -------
Total from investment operations             .0478    .0530    .0335      .0261     .0327     .0551     .0755    .0848    .0399
Less distributions from:
   Net investment income                     .0471    .0530    .0361      .0261     .0327     .0551     .0755    .0848    .0399
                                           -------  -------  -------    -------  --------   -------    ------   ------  -------
Total distributions                          .0471    .0530    .0361      .0261     .0327     .0551     .0755    .0848    .0399
Capital contribution                             _        _    .0026          _         _         _         _        _        _
                                           -------  -------  -------    -------  --------   -------    ------   ------  -------
Net asset value, end of period            $ 1.0000 $ 1.0000 $ 1.0000   $ 1.0000  $ 1.0000  $ 1.0000  $ 1.0000 $ 1.0000 $ 1.0000
                                           =======  =======  =======    =======   =======   =======   =======  =======  =======
Total return (%)                              4.81     5.45     3.67(c)    2.64      3.32      5.64      7.81     8.86     7.79 (b)
Ratios to average daily net assets (%):
   Expenses                                     71      .72      .71        .71       .71       .71       .75      .80      .81
   Net investment income                      4.78     5.30     3.61       2.61      3.27      5.51      7.56     8.47     7.54
Supplemental data:
   Net assets at end of period (000s)     $760,808 $703,993   $1,277  $ 477,268  $448,797  $402,978  $415,292 $342,245 $203,704

</TABLE>

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

(a)      Ratios are annualized.
(b)      For the period from June 22, 1988 (Commencement of Operations) to
         December 31, 1988.
(c)      The total return includes the effect of the investment adviser's
         capital contribution.  Without the investment adviser's capital
         contribution, the total return would have been 3.40%.





                                       5
<PAGE>   15
GROWTH FUND -


The portfolio seeks long-term appreciation of capital by investing in
well-managed companies in growing industries.

GOAL AND STRATEGY
The Growth Fund seeks long-term appreciation of capital by investing in well
managed companies in growing industries.  The Adviser researches the market for
companies that have grown more rapidly than the gross national product from one
business cycle to the next. The portfolio may invest in cyclical industries
when the Adviser deems them to be at or near the bottom of their business cycle
and expects a multi-year period of sustained growth.

The Adviser intends to seek growth opportunities by investing in each of the
following classes of companies in varying proportions:

LARGE, high quality, seasoned growth companies that have demonstrated sustained
growth over a long period of time;

MEDIUM sized companies of emerging investment quality whose records of sales
and earnings growth are not as well established; and

SMALL, rapid growth companies that have had especially vigorous growth in
revenues and earnings.

The Adviser will invest in companies that it believes are well managed
considering some or all of the following investment criteria:

A leader in the field.  The company should be, or clearly have the expectation
of becoming, a significant provider in the primary markets it serves.

Unique or specialty company.  The company should have some distinctive
attribute that cannot easily be duplicated by present or potential
competitors.  This may take the form of proprietary products or processes, a
unique distribution system, an entrenched brand name or an especially strong
financial position.

Quality products or services.  The company's products or services should be
regarded as being of superior quality, which should enable the company to
obtain a premium price and to command greater customer loyalty.

Marketing capability.  The company should have a distinctive capability in
sales, service or distribution.

Value to customer.  The prices of the company's products or services should be
based upon their value to the customer, rather than their production cost.

Return on equity.  The company should have achieved, or have the potential to
achieve, an above average return on equity through efficient use of assets and
adequate margins, rather than excessive financial leverage.  Such companies
should be able to finance most or all of their growth internally and translate
revenue and income growth into rising per share earnings and dividends.

Conservative financial policies and accounting practices.  The company should
have a relatively simple, clean financial structure and adhere to conservative
and straightforward accounting practices.





                                       6
<PAGE>   16
The portfolio invests primarily in common stocks.
PORTFOLIO SECURITIES   
The portfolio invests primarily in common stocks.  The portfolio may,
however, hold convertible debentures and preferred stocks that  meet its
investment criteria.  To a limited extent, the portfolio may also invest in
certain types of securities and use certain investment techniques, such as 
depository receipts, illiquid securities, investment companies, when-issued and
delayed delivery securities and repurchase agreements, which are more fully
described in the Investment Glossary at the end of this prospectus.  The
Investment Glossary also describes the portfolio's policies with regard to
borrowing, concentration, diversification and portfolio turnover, along with
the risks associated with the portfolio's investments and policies.  Types of
investments and investment techniques that the portfolio intends to use only to
a very limited extent, such as warrants, are described in the Statement of
Additional Information.

Generally the portfolio will remain fully invested, and the Adviser will not
attempt to time the market.  However, if a significant adverse market action is
anticipated, investment-grade debt securities may be held without limit as a
temporary defensive measure.  Normally, the portfolio does not purchase any
stocks with a view to quick turnover for capital gains.

All investments are subject to market fluctuations and financial risks. The 
value of your investment will fluctuate in response to stock market movements.

INVESTMENT RISKS
To the extent that the portfolio invests in small companies, it takes on        
additional risks.  This is because small companies may be in earlier stages of
development, may be dependent upon a small number of products or services, may
lack substantial capital reserves and/or do not have proven track records.
Smaller companies may be more adversely affected by poor economic or market
conditions. In addition, small companies may be traded in low volumes, which
can increase volatility and liquidity risks.   Any convertible debentures
issued by small companies are likely to be lower-rated or non-rated securities,
which generally involve more credit risk than debentures in the higher rating
categories and generally include some speculative characteristics.

PORTFOLIO MANAGEMENT
The Growth Fund is co-managed by Rocky Barber and Mark A. Fuller, III.

Rocky Barber is a principal of William Blair & Company, L.L.C.  He joined
William Blair in 1986 as a portfolio manager and manager of the Investment
Management Department.  Besides his management responsibilities, he co-manages
the Growth Fund and is a member of the department's Growth team.  Previously,
he was an equity manager with Alliance Capital Management for nine years and
president of the Alliance Capital Bond Fund, a group of fixed-income mutual
funds.  Prior to that, Rocky was a financial analyst with the Stanford
University Endowment.  Rocky is president of William Blair Mutual Funds, Inc.,
a past president of the Board of Commissioners of the Winnetka Park District
and a past Chairman of the Board of Trustees of the Stanford Business School
Trust.  He currently serves on the Board of the LaRabida Children's Hospital
Foundation.  Education:  B.A., M.S. and  M.B.A., Stanford University; CFA.

Mark A. Fuller, III is a principal of William Blair & Company, L.L.C.  He has
been with William Blair since 1983.  He began his career in Institutional
Sales, developing long-standing relationships with each of the firm's research
analysts.  Today he is a portfolio manager for numerous accounts, co-manages
the firm's Growth Fund and is a member of the department's Small Cap and
Aggressive Growth teams.  Prior to joining William Blair, he was a sales
representative with IBM Corporation.  Education:  B.A., Northwestern
University; M.B.A., Northwestern University Kellogg Graduate School of
Management.





                                       7
<PAGE>   17
VALUE DISCOVERY FUND  -

The portfolio's objective is long-term capital appreciation.  Using a value
discipline, the portfolio invests primarily in the equity securities of small
companies.

GOAL AND STRATEGY
The Value Discovery Fund's investment objective is to seek long-term capital
appreciation. The portfolio pursues its objective by investing with a value
discipline primarily in the equity securities of small companies. In selecting
companies for investment, the Adviser evaluates the extent to which a company
meets the investment criteria set forth below. The weight given to a particular
investment criterion will depend upon the circumstances, and some portfolio
holdings may not meet all of the following criteria:

Material Price/Value Disparity--whether the company's current market value
reflects a material discount from the Adviser's estimate of the company's
intrinsic value.  In determining a company's intrinsic value, the Adviser
generally will assess whether a company's share price appears to be inexpensive
relative to any of the following: sales, projected earnings, projected cash
flow, discounted cash flow, asset values and liquidation value. The discount of
the market value from the intrinsic value is considered material when it
provides an adequate return opportunity compared to alternative small company
investments. The Adviser believes that the short-term market assessment of a
company's value can differ materially from a long-term perspective. Therefore,
price/value disparities can result from particular industries and companies
currently being in disfavor in the market. As the reasons for market disfavor
dissipate, a market reassessment can result in price appreciation. However,
there is no guarantee that this will result in market appreciation for a
company.

Probable Expansion in Profitability--whether the company has a reasonable
expectation of improving its level of profitability over a three year
investment horizon.  The Adviser believes an expansion in profit margins
generally results in improved market valuation. Therefore, the Adviser will
look for companies that it believes have the potential for normal, sustainable
levels of profitability greater than their current levels. Factors used to
assess the normal level of future profitability for a company include industry
profit levels and competitiveness and the company's competitive advantages and
business strategy.

Skilled and Committed Management--whether the company has a capable and skilled
management team and a clearly articulated and logical business strategy with a
reasonable probability of successful execution. Generally, this determination
will be made through due diligence with management, which often includes
on-site meetings. Factors used to assess management's ability to execute its
business strategy include tangible evidence of prior business success and
management's level of financial commitment to the company through equity
ownership.

Strong Capital Structure--whether the company has a relatively simple, clean
financial structure without excessive use of financial leverage. In addition,
the company should adhere to conservative and straightforward accounting
practices.

Positive Catalyst--the likelihood that the company will undergo a positive
corporate change within a three-year investment horizon. Examples of positive
corporate changes may include: successful execution of its business plan,
acquisitions, mergers, spin-offs, divestitures, new products and management
additions or changes. The portfolio seeks to invest in companies before a
positive catalyst becomes apparent to the market.





                                       8
<PAGE>   18
The portfolio will invest in common stocks of small companies.

PORTFOLIO SECURITIES
Generally, most of the portfolio will be invested in the common stocks of small
companies.  Debentures and preferred stocks may be held, however,  if
convertible into common stocks that meet the investment criteria of the
portfolio. The portfolio may invest up to 5% of its net assets in foreign
securities, which includes depository receipts. To a limited extent, the
portfolio may also invest in certain types of securities and use certain
investment techniques such as depository receipts, foreign securities, illiquid
securities, investment companies, real estate investment trusts, repurchase
agreements and when-issued and delayed delivery securities, which are more
fully described in the Investment Glossary at the end of this prospectus.  The
Investment Glossary also describes the portfolio's policies with regard to
borrowing, concentration, diversification and portfolio turnover, along with
the risks associated with the portfolio's investments and policies.  Types of
investments and investment techniques that the portfolio intends to use only to
a very limited extent, such as warrants and futures, are described in more
detail in the Statement of Additional Information.

Generally the portfolio will remain fully invested, and the Adviser will not
attempt to time the market.  However, if a significant adverse market action is
anticipated, investment-grade debt securities may be held without limit as a
temporary defensive measure. Normally, the portfolio does not purchase
securities with a view to quick turnover for capital gains.


All investments are subject to market fluctuations and financial risks. The
value of your investment will fluctuate in response to stock market movements.

INVESTMENT RISKS
Stocks of small companies carry higher risks that those of larger companies.    
This is because small companies may be in an earlier stage of development, may
be dependent on a small number of products or services, may lack substantial
capital reserves and/or do not have proven track records.  Smaller companies
may be more adversely affected by poor economic or market conditions. In
addition, small companies may be traded in low volumes, which can increase
volatility and liquidity risks.  From time to time, the portfolio may invest in
the equity securities of very small companies, often referred to as "micro cap"
companies. The considerations noted above are generally intensified for these
investments.  Any convertible debentures issued by small companies are likely
to be lower-rated or non-rated securities, which generally involve more credit
risk than debentures in the higher rating categories and generally include some
speculative characteristics.


PORTFOLIO MANAGEMENT
The portfolio is co-managed by Mr. Glen Kleczka, Mr. David Mitchell and Ms. 
Capucine Price. 

Glen Kleczka joined William Blair & Company, L.L. C. & Company, L.L.C.
in 1996 and leads the Value Discovery Fund portfolio management team.  Since
1989, he was a partner in the Private Markets and U.S. Equity groups of Brinson
Partners, Inc., managing the firm's Post-Venture Fund.  This $900 million fund
invested in small capitalization companies, many of which were previously
backed by venture capitalists.  Glen was a member of the firm's Private Markets
Committee, which approved all investments in venture capital deals and
partnership investments. Previously, he spent two years at CNA Financial Corp.
as a co-manager of their Variable Annuity Trust's $60 million equity
allocation.  Glen is a member of the Investment Analysts Society of Chicago. 
Education: B.S., Finance, Marquette University; M.S.  Finance & Investment
Banking, University of Wisconsin-Madison; and CFA.







                                       9
<PAGE>   19

David Mitchell joined William Blair & Company, L.L.C. in 1996 as portfolio
manager of the Value Discovery Fund.  Previously, he was a partner in the U.S.
Equity group at Brinson Partners, Inc.  At Brinson, he was a member of a four-
person team that managed a $900 million institutional micro-cap value product.
Before that, he was co-manager of Thomas Paine Investors, L.P., a limited
partnership invested in entrepreneurial companies.  Education: B.A., Economics,
Knox College; M.B.A., Northwestern University Kellogg Graduate School of
Management; and CFA.

Capucine "Cappy" Price joined William Blair & Company, L.L.C. in 1996
as portfolio manager of the Value Discovery Fund.  From 1993 to 1996, she was a
partner in the Private Markets and U.S. Equity groups of Brinson Partners, Inc.
Her primary responsibility was investment analysis for the firm's Post-Venture
Fund, a micro-cap, value-oriented stock fund.  Prior to joining Brinson
Partners, Inc., Cappy was an equity analyst and First Scholar with the First
National Bank of Chicago.  Education: B.A., Economics, University of Michigan;
M.A., Social Science, University of Chicago; M.B.A., Northwestern University
Kellogg Graduate School of Management.





                                       10
<PAGE>   20
INTERNATIONAL GROWTH FUND  -



The portfolio seeks long-term capital appreciation through investment in
well-managed, quality, growth companies.

Securities markets in different countries may offer enhanced diversification of
investors' portfolios because of differences in economic, financial, political
and social factors.

The portfolio allows investors to diversify their portfolios by investing in
various companies and economies outside the U.S., thereby taking advantage of
these differences.

The portfolio primarily invests in common stocks issued by foreign companies.

GOAL AND STRATEGY
The investment objective of the International Growth Fund is long-term capital
appreciation through investment in well-managed, quality growth companies.
Such companies will generally exhibit superior business fundamentals,
including leadership in their field, quality products or services, distinctive
marketing and distribution, pricing flexibility and revenue from products or
services consumed on a steady recurring basis. These business characteristics
should be accompanied by management that is shareholder return oriented and
uses conservative accounting policies.  Companies with above average returns on
equity, strong balance sheets and consistent, above average earnings growth at
reasonable valuation levels will be the primary focus.  Stock selection will
take into account both local and global comparisons.  Current income is not an
investment objective, although it is anticipated that capital appreciation will
normally be accompanied by modest investment income, which may vary depending
on the allocation of the investments.

In pursuing its investment objective, the portfolio will vary the geographic
diversification and types of securities in which it invests based upon
continuous evaluation by the Adviser of economic, market and political trends
throughout the world. The investment of the portfolio's assets in various
international securities markets tends to decrease the degree to which events in
any one country can affect the entire portfolio.  In making decisions regarding
the country allocation, the Adviser will consider such factors as the
conditions and growth potential of various economies and securities markets,
currency exchange rates, technological developments in the various countries
and other pertinent financial, social, national and political factors.  It is
anticipated that the majority of the portfolio's investments normally will be
divided among Continental Europe, the United Kingdom, Japan and the markets of
the Pacific Basin (including Australia and New Zealand).  Selective investments
may also be made in Canada and Latin America and in emerging markets worldwide.
While the portfolio normally will invest around 18% of its assets in emerging
markets, from time to time, it may invest as little as 5% and as much as 30% of
its assets in such markets.  The portfolio will invest in companies at
different stages of development ranging from large, well-established companies
to smaller companies at an earlier stage of development.  Fundamental company
analysis and stock selection will be the most important investment criteria.

The portfolio normally will allocate its investments among not less than six
different countries and will not concentrate investments in any particular
industry.   However, the portfolio may have more than 25% of its assets
invested in any major industrial or developed country.  No more than 50% of the
portfolio's equity securities may be invested in securities of issuers of any
one country at any given time.

PORTFOLIO SECURITIES
The portfolio ordinarily will invest at least 80% of its total assets
in a diversified portfolio of common stocks with above average growth,
profitability and quality characteristics, issued by companies domiciled
outside the U.S. and in securities convertible into, exchangeable for, or
having the right to buy such common stocks.  Such companies would include
companies that historically have had superior growth, profitability and quality
relative to local markets and relative to companies within the same industry
worldwide and that are expected to continue such performance.  For liquidity
purposes, up to 20% of the portfolio may be held in cash (U.S. dollars and
foreign currencies) or in short-term securities, such as repurchase agreements
and domestic and foreign money market instruments, such as government
obligations, certificates of deposit, bankers' acceptances, time deposits,
commercial paper and short-term





                                       11
<PAGE>   21
corporate debt securities.  The portfolio does not have any specific rating
requirements for its portfolio securities.  In addition, the portfolio may
enter into forward foreign currency transactions in an effort to protect
against changes in foreign exchange rates.


To a limited extent, the portfolio may also invest in types of securities and   
use certain investment techniques, such as depository receipts, foreign
currency futures, forward foreign currency transactions, illiquid
securities, investment companies, repurchase agreements and when-issued and
delayed delivery securities, which are more fully described in the Investment
Glossary at the end of this prospectus.  The Investment Glossary also describes 
the portfolio's policies with regard to borrowing, concentration,
diversification, and portfolio turnover, along with the risks associated with
such investments and policies.  Types of investments and investment techniques
that the portfolio intends to use only to a very limited extent, such as
warrants, are described in more detail in the Statement of Additional
Information.

Investments in foreign equity securities present opportunities for both
increased benefits and risks as compared to investments in the U.S. securities
market.

The value of your investment will fluctuate in response to the movement of
stock markets in various countries.
INVESTMENT RISKS
The risks of investing in securities of foreign issuers may include less        
publicly available information, less governmental regulation and supervision of
foreign stock exchanges, brokers and issuers, a lack of uniform accounting,
auditing and financial reporting standards, practices and requirements, the
possibility of expropriation, nationalization, confiscatory taxation, adverse
changes in investment or exchange control regulations, political instability,
restrictions on the flow of international capital and difficulty in obtaining 
and enforcing judgments against foreign entities.  Securities of some foreign 
issuers are less liquid and their prices more volatile than the securities of 
U.S. companies.  In addition, the time period for settlement of transactions in
foreign securities generally is longer than for domestic securities.  The 
portfolio may invest a portion of its assets in emerging markets, which may 
include developing countries or countries with new or developing capital 
markets.
Although the Fund will try to invest in companies and governments of countries
having stable or improving political environments, there is the possibility of
expropriation or confiscatory taxation, seizure or nationalization of foreign
bank deposits or other assets, establishment of exchange controls, the adoption
of foreign government restrictions and other adverse political, social or
diplomatic developments that could affect investment in these nations.

The risks described above, including the risks of nationalization and
expropriation of assets, are typically increased to the extent that the Fund
invests in issuers located in less developed and developing nations, whose
securities markets are sometimes referred to as "emerging securities markets."
Investments in securities located in such countries are speculative and subject
to certain special risks.  Political and economic structure in many of these
countries may be in their infancy and developing rapidly, and such countries
may lack the social, political and economic characteristics of more developed
countries.  Certain of these countries have in the past failed to recognize
private property rights and have at times nationalized and expropriated the
assets of private companies.

The currencies of certain emerging market countries have experienced a steady
devaluation relative to the U.S. dollar, and continued devaluations may
adversely affect the value of a fund's assets denominated in such currencies.
Many emerging market countries have experienced substantial rates of inflation
for many years, and continued inflation may adversely affect the economies and
securities markets of such countries.

In addition, unanticipated political or social developments may affect the
values of the Fund's investments in these countries and the availability to the
Fund of additional investments in these countries.  The small size, limited
trading volume and relative





                                       12
<PAGE>   22
inexperience of the securities markets in these countries may make the Fund's
investments in such countries illiquid and more volatile than investments in
more developed countries, and the Fund may be required to establish special
custodial or other arrangements before making investments in these countries.
There may be little financial or accounting information available with respect
to issuers located in these countries, and it may be difficult as a result to
assess the value or prospects of an investment in such issuers.

The securities held by the portfolio will usually be denominated in currencies
other than the U.S. dollar.  Therefore, changes in foreign exchange rates will
affect the value of the securities held in the portfolio either beneficially or
adversely.  Fluctuations in foreign currency exchange rates will also affect
the value of dividends and interest earned, gains and losses realized on the
sale of securities and net investment income and gains, if any, available for
distribution to shareholders.

The portfolio is expected to incur operating expenses that are higher
than those of mutual funds investing exclusively in U.S. equity securities,
since expenses such as custodial fees related to foreign investments are
usually higher than those associated with investments in U.S. securities. 
Similarly, brokerage commissions on purchases and sales of foreign securities 
are generally higher than on domestic securities.  In addition, dividends and
interest from foreign securities may be subject to foreign withholding taxes. 
(For more information, see "Your Account - Dividends, Distributions and
Taxes".)

Although the portfolio will normally invest at least 80% of its assets in the
equity securities of companies domiciled outside of the U.S., the portfolio may
significantly alter its make-up as a temporary defensive strategy.  A defensive
strategy would only be employed if, in the judgment of the Adviser, investments
in international equity securities became decidedly unattractive because of
current or anticipated adverse economic, financial, political and social
factors.  The types of securities that might be acquired and held for defensive
purposes could include non-convertible preferred stock, investment-grade debt
securities, fixed-income securities and securities issued by the U.S. or
foreign governments as well as domestic or foreign money market instruments.
At such time as the Adviser determines that the portfolio's defensive strategy
is no longer warranted, the portfolio will adjust its portfolio back to its
normal complement of international equity securities as soon as practicable.





                                       13
<PAGE>   23
PORTFOLIO MANAGEMENT
The portfolio is co-managed by Norbert W. Truderung and W. George Greig.

Norbert W. Truderung, a principal of William Blair & Company, L.L.C. joined the
firm in 1986.  He is a member of the Investment Management Department's
research committee and a senior vice president of William Blair Mutual Funds,
Inc.  Norbert is also a member of the department's Small and Aggressive Growth
teams.  Previously, Norbert spent eight years at The Northern Trust Company as
a senior investment research analyst and as portfolio manager for the bank's
international investment funds.  He was responsible for managing their
international research effort and served as a member of the bank's investment
policy committee.  From 1974-78, Norbert was an investment analyst at National
City Corporation (Cleveland).  He is a member of the Investment Analysts
Society of Chicago.  Education:  B.A., Baldwin-Wallace College; CFA.

W. George Greig joined William Blair & Company, L.L.C.'s Investment Management
Department in 1996 as an international portfolio manager.  He previously headed
international equities for PNC Bank in Philadelphia.  George was a founding
partner of Pilgrim Baxter & Associates, where he was an analyst, research
director and portfolio manager for over ten years.  He also served as chief
investment officer of Framlington Group plc during its association with Pilgrim
Baxter and founded and managed a joint venture between the two firms.
Education:  B.S., Massachusetts Institute of Technology; M.B.A., Wharton
School of the University of Pennsylvania.





                                       14
<PAGE>   24
INCOME FUND  -


The Income Fund's objective is to provide investors with as high a level of
current income as is consistent with the preservation of capital by investing
primarily in a diversified portfolio of high grade intermediate-term debt
securities.

GOAL AND STRATEGY
The Income Fund pursues its investment objective of providing investors with as
high a level of current income as is consistent with preservation of capital by
investing primarily in a diversified portfolio of high grade, intermediate-
term debt securities.

The anticipated dollar weighted average maturity of the portfolio is three to
seven years.  The anticipated weighted average modified duration for the
portfolio is two to five years, with a maximum duration on any instrument of
eight years.  The Adviser will not continue to hold a security whose duration
has moved above eight years.

PORTFOLIO SECURITIES
As a matter of fundamental policy, under normal conditions at least 90% of the
portfolio's assets will be invested in the following:

- -  U.S. DOLLAR DENOMINATED DEBT SECURITIES (domestic or foreign) with long-term
ratings of "A-" or better, or an equivalent rating, by at least one of the
following four nationally recognized statistical rating organizations ("Rating
Organizations"): Duff & Phelps, Inc., Fitch Investors Service, Inc., Moody's
Investors Service, Inc. and Standard & Poor's Corporation;

- -  OBLIGATIONS OF OR GUARANTEED BY THE UNITED STATES GOVERNMENT, its agencies
or instrumentalities.  These securities include direct obligations of the U.S.
Treasury, which differ only in their interest rates, maturities and time of
issuance and obligations issued or guaranteed by U.S. Government agencies or
instrumentalities, which differ in the degree of support provided by the U.S.
Government. Although these securities are subject to the market risks resulting
from fluctuation in interest rates, they will be paid in full if held to
maturity;

- -  COLLATERALIZED OBLIGATIONS, which are debt securities issued by a
corporation, trust or custodian, or by a U.S. Government agency or
instrumentality, that are collateralized by a portfolio or pool of assets, such
as mortgages, mortgage-backed securities, debit balances on credit card
accounts or U.S. Government securities.  The issuer's obligation to make
interest and/or principal payments is secured by the underlying pool or
portfolio of securities.  The Income Fund may invest in collateralized
obligations that are not guaranteed by a U.S. Government agency or
instrumentality only if the collateralized obligations are rated A- or better,
or an equivalent rating, by one of the Rating Organizations; and

- -  COMMERCIAL PAPER obligations rated within the highest grade by one of the
four Rating Organizations.

Up to 10% of the portfolio's total assets may be invested in unrated debt
securities, provided that the Adviser deems such securities to be of at least
"A-" quality and provided that the comparable debt of the issuer has a rating
of at least "A-" or its equivalent by one of the four Rating Organizations.

Generally the portfolio will remain fully invested, and the Adviser will not
attempt to time the market.  However, the portfolio for temporary defensive
purposes may invest up to 100% of its assets in other types of securities,
including high quality commercial paper, obligations of banks and savings
institutions, U.S. Government securities, government agency securities and
repurchase agreements, or it may retain funds in cash.  The portfolio does not
invest in equity securities.

To a limited extent, the portfolio may invest in certain types of securities    
and use certain investment techniques, such as illiquid securities, repurchase
agreements and when-issued and delayed delivery securities, which are more
fully described in the Investment Glossary at the end of this Prospectus.  The
Investment





                                       15
<PAGE>   25
Glossary also describes the portfolio's policies with regard to borrowing,
concentration, diversification, duration and portfolio turnover, along with
the risks associated with such investments and policies.  In addition, the
portfolio's policy regarding lending portfolio securities is described in more 
detail in the Statement of Information.
INVESTMENT RISKS
The portfolio's investments are subject to financial risks.  However,   
in the  opinion of the Adviser, the risk of loss of principal should be reduced
due to the relatively high quality of the investments in which the portfolio    
will primarily invest.  Obligations that are unrated are not necessarily of
lower quality than those that are rated, but may be less marketable and,
consequently, provide higher yields.  The portfolio's investments are subject
to price fluctuations resulting from various factors, including rising or
declining interest rates (market risks).  The value of the portfolio's
investments (other than an interest-only class of a collateralized obligation)
tends to decrease when interest rates rise and tends to increase when interest
rates fall.   The value of the portfolio's securities also is subject to the
ability of the issuers of such securities to make payment at maturity
(financial risks).  For example, not all securities issued or guaranteed by
agencies or instrumentalities of the U.S. Government are backed by the full
faith and credit of the United States.  Such securities involve different
degrees of government backing.  Some obligations issued or guaranteed by U.S.
Government agencies or instrumentalities in which the portfolio may invest are
backed by the full faith and credit of the United States, such as modified
pass-through certificates issued by the Government National Mortgage
Association, while others are backed exclusively by the agency or
instrumentality with limited rights of the issuer to borrow from the U.S.
Treasury (such as obligations of the Federal National Mortgage Association and
the Federal Home Loan Mortgage Corporation).  Others are backed only by the
credit of the issuer itself (such as obligations of the Student Loan Marketing
Association).  In addition, investments with longer maturities, which typically
provide better yields, may subject the portfolio to increased price changes
resulting from market yield fluctuations.

For a description of ratings, see Appendix B in the Statement of Additional
Information.

PORTFOLIO MANAGEMENT
The portfolio is managed by Bentley Myer, a principal of William Blair &
Company, L.L.C.  Bentley joined the firm in 1991 as a fixed-income portfolio
manager.  From 1983 to 1991 he was associated with LaSalle National Trust,
first as head of fixed-income investments and later as chief investment
officer.  Prior to that, Bentley was head of the municipal investment section
of the trust department of Harris Trust and Savings Bank.  He is currently a
Trustee of Delnor Community Hospital as well as a member of the Investment
Analysts Society of Chicago.  Education:  B.A., Middlebury College; M.B.A.,
Wharton School of the University of Pennsylvania.





                                       16
<PAGE>   26
READY RESERVES FUND -


The Ready Reserves Fund's investment objective is to obtain the maximum current
income consistent with preservation of capital by investing exclusively in high
quality money market instruments.

The portfolio will invest exclusively in short-term, high quality U.S. dollar
denominated domestic and foreign money market instruments.

GOAL AND STRATEGY
The Ready Reserves Fund pursues its investment objective of obtaining the
maximum current income consistent with preservation of capital by investing
exclusively in high quality money market instruments.  These instruments are
considered to be among the safest investments available because of their short
maturities, liquidity and high quality ratings.  The portfolio seeks to
maintain a net asset value of $1.00 per share.  Nevertheless, there is no
guarantee that the objective of the portfolio will be achieved or that the net
asset value of $1.00 per share of the portfolio will be maintained.

PORTFOLIO SECURITIES
The portfolio will invest exclusively in U.S. dollar denominated money market
instruments, including those issued by:

- - the U.S. Government, its agencies and instrumentalities;
- - U.S. and foreign banks;
- - Municipalities;
- - Foreign governments; and
- - Multinational organizations, such as the World Bank.

No more than 5% of the portfolio's assets may be invested in securities rated
in the second-highest short-term category (or unrated equivalents).  The rest
of the portfolio's investments must be in the highest short-term rating
category.

No more than 25% of the portfolio's assets may be invested in obligations that
are issued either by foreign banks or by foreign branches of U.S. banks, unless
these obligations are backed by the U.S. parent bank.  The portfolio maintains
an average maturity of 90 days or less and does not invest in securities with
maturities of more than 13 months.
   
To a limited extent, the portfolio may also invest in certain types of  
securities and use certain investment techniques, such as repurchase
agreements, Section 4(2) commercial paper, when-issued and delayed delivery
securities and variable rate securities, which are more fully described in the
Investment Glossary at the end of this Prospectus.  The Investment Glossary
also describes the portfolio's policies with regard to borrowing,
concentration, diversification and ratings, along with the risks associated
with such investments and policies.  Types of investments and investment
techniques that the portfolio intends to use only to a very limited extent are
described in the Statement of Additional Information.
    
INVESTMENT RISKS
The yield paid by the portfolio will vary with changes in interest rates.
While the portfolio seeks to maintain its $1.00 share price, there is no
guarantee that it will be able to do so.

PORTFOLIO MANAGEMENT
The portfolio is managed by Bentley Myer, a principal with William Blair &
Company, L.L.C.  Bentley joined the firm in 1991 as a fixed-income portfolio
manager.  From 1983 to 1991 he was associated with LaSalle National Trust,
first as head of fixed-income investments and later as chief investment
officer.  Prior to that, Bentley was head of the municipal investment section
of the trust department of Harris Trust and Savings Bank.  He is currently a
Trustee of Delnor Community Hospital as well as a member of the Investment
Analysts Society of Chicago.  Education:  B.A., Middlebury College; M.B.A.,
Wharton School of the University of Pennsylvania.





                                       17
<PAGE>   27

YOUR ACCOUNT -

HOW TO BUY

============================== 
MINIMUM INVESTMENTS

OPENING AN ACCOUNT
Regular Accounts        $5,000
IRAs                    $2,000

ADDING TO AN ACCOUNT
Ready Reserves Fund         $1
All Other Portfolios    $1,000
============================== 

BY MAIL    

OPENING AN ACCOUNT.  To open a new account by mail, make out a check for the
amount of your investment, payable to "William Blair Mutual Funds, Inc."  (the
"Fund").  Complete the account application included with this Prospectus, and
mail the completed application and the check to the Fund's Transfer Agent,
State Street Bank and Trust Company ("State Street"), P.O. Box 9104, Boston,
Massachusetts 02266-9104.  


For the Ready Reserves Fund, send your check and completed application to the
Distributor, William Blair Mutual Funds, Inc., 222 West Adams Street, Chicago,
Illinois 60606.  

ADDING TO AN ACCOUNT.  To purchase additional shares of the Fund, make out a
check for the amount of your investment, payable to "William Blair Mutual
Funds, Inc."   Mail the check, together with a letter that specifies the
portfolio name, the account number and the name(s) in which the account is
registered, to State Street Bank and Trust Company, P.O. Box 9104, Boston,
Massachusetts 02266-9104.


For the Ready Reserves Fund, send your check and letter to the Distributor,
William Blair Mutual Funds, Inc. 222 West Adams Street, Chicago, Illinois
60606.
    


BY WIRE
    
OPENING AN ACCOUNT.  First, call State Street at 1-800-635-2886 (in
Massachusetts, 1-800-635-2840) for an account number. Then instruct your bank
to wire federal funds to:

State Street Bank and Trust Co.
ABA # 011000028
DDA # 99029340
Attn: Custody & Shareholder Services
225 Franklin Street
Boston, Massachusetts 02110

Include the portfolio name in which you are investing, your assigned account    
number and the name(s) in which the account is registered.  Finally, complete
the account application, indicate the account number assigned to you by State
Street and mail it to William Blair Mutual Funds, Inc., 222 West Adams Street,
Chicago, Illinois 60606.

ADDING TO AN ACCOUNT.  To add to your account by wire, instruct your bank to
wire federal funds to:

State Street Bank and Trust Co.
ABA # 011000028
DDA # 99029340
Attn: Custody & Shareholder Services
225 Franklin Street
Boston, Massachusetts 02110

In your request, specify the portfolio name in which you are investing, your
account number and the name(s) in which the account is registered.

To add to an existing account by wire transfer of funds, you must have selected
this option on your account application.  

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

                                      18
<PAGE>   28
YOUR ACCOUNT-CONTINUED
================================================================================

ALL FIVE OF THE FUND'S PORTFOLIOS ARE NO-LOAD FUNDS.  A load is a sales
charge that you pay when you purchase or sell your mutual fund shares.  

 BY TELEPHONE

 OPENING AN ACCOUNT.  See "By Wire."     ADDING TO AN  ACCOUNT.  Call your
                                         State Street  account executive  at
                                         1-800-635-2886   (in   Massachusetts,
                                         1-800-635-2840).   For the Ready
                                         Reserves  Fund only,  call your
                                         William Blair  account executive at
                                         (312) 364-8000.
 
                                         Tell your account executive            
                                         the portfolio name, your  account
                                         number and the name(s) in which the
                                         account is registered. You may then
                                         pay for your new shares by mail or by
                                         wire.

                                         To add to an existing  account
                                         by telephone, you  must have selected
                                         this option on your account
                                         application.

MINIMUM INVESTMENTS. To open an account, the minimum initial investment for     
regular accounts is $5,000, and the minimum initial investment for Individual
Retirement Accounts ("IRAs") is $2,000.  To add to an account, the minimum
subsequent investment is generally $1,000 for all accounts, except accounts
holding shares of the Ready Reserves Fund, for which the subsequent minimum
investment is $1.  The portfolios may accept smaller amounts under a group
payroll deduction or similar plan.  These minimum amounts may be changed at any
time and may be waived for directors, principals, officers or employees of the
Fund or William Blair & Company, L.L.C. (the "Adviser").

PURCHASE PRICE.   All five portfolios of the Fund are "no-load," which means
that you do not pay a sales charge when you buy or sell shares.  All purchases
are made at a price based on the net asset value per share that is next
computed after receipt of your order in proper form by the Distributor, the
Transfer Agent or a designated agent thereof.  For the Ready Reserves Fund, the
net asset value per share will normally be $1.00.  (For more information, see
"Determination of Net Asset Value.")  If you fail to pay for your order, you
will be liable for any loss to the Fund and, if you are a current shareholder,
the Fund may redeem some or all of your shares to cover such loss.


NOTE:  All purchases made by check should be in U.S. dollars and made payable
to William Blair Mutual Funds, Inc., or in the case of a retirement account,
the custodian or trustee of such account.  Third party checks will not be
accepted.  When purchases are made by check or periodic account investment, the
Fund may delay sending redemption proceeds until it has determined that
collected funds have been received for the purchase of such shares, which may
be up to 15 calendar days.

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


                                       19

<PAGE>   29

YOUR ACCOUNT-CONTINUED
================================================================================

HOW TO SELL





You can arrange to take money out of your Fund account at any time by selling
("redeeming") some or all of you shares.  You may give instructions to redeem
your shares by mail, by wire or by telephone, as described below.

 BY MAIL


For all portfolios except the Ready Reserves Funds, to redeem shares by mail,
send a written redemption request signed by all account owners to State Street
Bank and Trust Company, P.O. Box 9104, Boston, Massachusetts 02266-9104.

For the Ready Reserves Fund, send your redemption request signed by all account 
owners to the Distributor, William Blair & Company, L.L.C., 222 West Adams
Street, Chicago, Illinois 60606, to the attention of your account executive. 
Amounts redeemed will be placed in your brokerage account.

FOR ALL FIVE PORTFOLIOS OF THE FUND, WRITTEN REDEMPTION REQUESTS MUST INCLUDE:

                               / a letter that contains your name, the
                               portfolio's name and the dollar amount or number
                               of shares to be redeemed;
                               / any stock certificates endorsed, or
                               accompanied by an endorsed stock power, to the
                               order of the Fund; and
                               / any other necessary documents, such as an
                               inheritance tax consent or evidence of authority
                               (for example, letters testamentary), dated not
                               more than 60 days prior to receipt thereof by
                               State Street or the Distributor.


 BY TELEPHONE
To redeem shares by telephone, you must have elected this option on your
account application.  For all portfolios except the Ready Reserves Fund,
contact the Fund's Transfer Agent at 1-800-635-2886 (in Massachusetts,
1-800-635-2840).

For the Ready Reserves Fund, you may redeem some or all of your shares by
telephone by calling your William Blair account executive at (312) 364-8000.
Amounts redeemed will be placed in your brokerage account.


 BY WIRE
To redeem some or all of your shares in any of the five portfolios by wire, you
may contact the Transfer Agent, or the Distributor in the case of the Ready
Reserves Fund, by mail or telephone, as explained above.  To redeem by wire,
you must have elected this option on your account application and attached a
voided, unsigned check or deposit slip for your bank account to the
application.
NOTE:  Redemption requests should NOT be sent to the Fund or to the Distributor
(except in the case of the READY RESERVES FUND).




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

                                       20
<PAGE>   30
YOUR ACCOUNT-CONTINUED
================================================================================


Signature guarantees must be obtained from a bank that is a member of the FDIC,
by a brokerage firm that is a member of the NASD, or by an eligible guarantor
who is a member of, or a participant in, a signature guarantee program.

SIGNATURE GUARANTEES.  Your redemption request must include a signature
guarantee if any of the following situations apply:

/ You wish to redeem shares having a value of $5,000 or more in a single
  transaction; 
/ Your account registration has changed; or 
/ You want a check in the amount of your redemption to be mailed to a different
  address than the one on your account application (address of record).

Signature guarantees, if required, must appear on the written redemption
request and on any endorsed stock certificate or stock power.

REDEMPTION PRICE.  The redemption price that you receive for your shares may be
more or less than the amount that you originally paid for them, depending upon
their net asset value at the time your redemption request is received in proper
order by the Distributor, the Transfer Agent or a designated agent thereof.
For the Ready Reserves Fund, the net asset value will usually be $1.00.

PAYMENT FOR REDEEMED SHARES.  Payment normally will be mailed to you at the
address of record for your account by the third business day after receipt by
State Street (or, in the case of the Ready Reserves Fund, the Distributor) of a
redemption request and any other required documentation and after any checks in
payment for your shares have cleared.

For the Ready Reserves Fund, if the Distributor receives notice of your request 
to redeem shares by 9:30 a.m., Chicago time, the redemption will be effected as
of that date and proceeds normally will be paid that day.  If notice of your
redemption request is received after that time, proceeds normally will not
be paid until the next business day.

AUTOMATIC REDEMPTION OF SMALL ACCOUNTS.  Because of the relatively high cost of
maintaining small accounts, the Fund reserves the right to redeem your shares
in any account that, following a redemption, is below a specified amount.
Currently, the MINIMUM IS $5,000 PER PORTFOLIO.  Before the redemption is
processed, you will be notified that the value of your account has fallen below
the minimum and allowed to make an additional investment.

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

                                       21
<PAGE>   31
YOUR ACCOUNT-CONTINUED
================================================================================

 SPECIAL REDEMPTION METHODS FOR THE
 READY RESERVES FUND


In addition to the above methods, shares of the Ready Reserves Fund can be
redeemed by two other methods unique to this portfolio.  Redemption requests
will be processed after the next daily dividend declaration at the net asset
value next determined upon receipt by the Distributor of a proper redemption
request.  In this way, you will receive the net asset value of your shares and
all declared but unpaid dividends on your shares through the date of
redemption.

1.  REDEMPTION BY CHECK.  To redeem shares by check, you must fill out the
appropriate section of your account application.  If your application for the
check writing privilege is approved, you will be provided with checks that may
be made payable to any person IN AN AMOUNT NOT LESS THAN $500 NOR MORE THAN $9
MILLION.  There currently is no charge for this service and no limit on the
number of checks that you may write; however, these provisions are subject to
change.

The payee of the check may cash or deposit it like any other check drawn on a
bank.  When the check is presented for payment, a sufficient number of full and
fractional shares from your account will be redeemed at their next determined
net asset value per share, usually $1.00, to cover the amount of the check.
This enables you to continue earning daily dividends until the check clears.
Canceled checks will be returned to you by State Street.  For joint accounts,
unless a single signer has been authorized on your account application, checks
must be signed by all joint account owners.

The Fund may refuse to honor checks whenever the right of redemption has been
suspended or postponed or whenever your account is otherwise impaired.  For
instance, your account would be considered to be impaired when (1) there are
insufficient assets to cover the check, (2) a "stop order" has been placed on
the check and (3) in other situations, such as where there is a dispute over
ownership of the your account.  A $25 SERVICE FEE will be charged when a check
is presented to redeem portfolio shares in excess of the value of your account
or for an amount less than $500.

2.  AUTOMATIC REDEMPTION.  The Distributor has instituted an automatic
redemption procedure available to Ready Reserve Fund shareholders who maintain
certain brokerage accounts with it.  The Distributor may use this procedure to
satisfy amounts due it by you as a result of purchases of securities or other
transactions in your brokerage account.  Under this procedure, if you so elect,
your brokerage account will be scanned at the opening of business each day and,
after application of any cash balances in the brokerage account, a sufficient
number of portfolio shares will be redeemed, effective that day at the next
determined net asset value, to satisfy any amounts which you are obligated to
pay to the Distributor. You will receive all dividends declared but unpaid
through the date of redemption.
- --------------------------------------------------------------------------------




                                       22
<PAGE>   32
YOUR ACCOUNT-CONTINUED
================================================================================
EXCHANGES


 . Growth Fund
 . Value Discovery Fund
 . International Growth Fund
 . Income Fund
 . Ready Reserves Fund


Subject to the following limitations, you may exchange shares of all five
portfolios for each other at their relative net asset values so long as the
portfolio shares to be acquired are registered in your state of residence.
There is NO SERVICE FEE for an exchange; however, ONLY FOUR (4) EXCHANGES FROM
A PORTFOLIO ARE ALLOWED WITHIN ANY 12-MONTH PERIOD.  Exchanges will be effected
by redeeming your shares of the portfolio held and purchasing shares of the
other portfolio or portfolios requested.


 BY MAIL


You may request an exchange of your shares by writing to William Blair Mutual
Funds, Inc., Attention: Exchange Department, P.O. Box 9104, Boston,
Massachusetts 02266-9104.


 BY TELEPHONE

You may also exchange your shares by telephone by completing the appropriate
section on your account application.  Once your telephone authorization is on
file, State Street will honor your requests to redeem shares by telephone at
1-800-635-2886 (in Massachusetts, 1-800-635-2840).  If you hold certificated
shares of the Fund, you must deposit them with State Street prior to any
exchange of such shares.

Neither the Fund nor State Street will be liable for any loss, expense or cost
arising out of any telephone request pursuant to the telephone exchange
privilege, including any fraudulent or unauthorized request, and you will bear
the risk of loss, so long as the Fund or its Transfer Agent reasonably
believes, based upon reasonable verification procedures, that the telephonic
instructions are genuine.  The VERIFICATION PROCEDURES include (1) recording
instructions, (2) requiring certain identifying information before acting upon
instructions and (3) sending written confirmations.

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



                                       23
<PAGE>   33
YOUR ACCOUNT-CONTINUED
================================================================================
SHAREHOLDER SERVICES AND RIGHTS


William Blair provides a variety of services to help you manage your account.

AUTOMATIC SWEEP PROGRAM.  You can purchase shares of the Ready Reserves Fund
through an automatic sweep program if you establish a brokerage account with
the Distributor, William Blair & Company, L.L.C., provided that you meet the
current minimum brokerage account size requirements.  The automatic sweep
program helps you to make convenient, efficient use of free credit balances in
your William Blair brokerage account.

TO PURCHASE SHARES of the Ready Reserves Fund through the automatic sweep
program, you must have a free credit balance in your brokerage account with the
Distributor. Currently, free credit balances are used automatically to purchase
shares of the portfolio.  If you have a FREE CREDIT BALANCE OF AT LEAST $1,000,
the Distributor will effect on your behalf an investment in the portfolio
shares on an expedited basis.

                            /If you have a free credit balance resulting from
                            securities transactions in your brokerage account
                            at the opening of business of the Distributor, it
                            generally will be invested in shares of the
                            portfolio on that same day, but in no event later
                            than the next business day.

                            / If you have a free credit balance resulting from
                            a deposit made prior to 2:00 p.m., Chicago time, or
                            a receipt of income (by check or wire), then it
                            will be invested in shares of the portfolio no
                            later than the next business day.

                            /If you have a free credit balance of at least $1
                            and less than $1,000, it will be invested in shares
                            of the portfolio within a maximum of five business
                            days from the day when the free credit balance is
                            created.

DIVIDEND OPTIONS.  You may choose to have your distributions reinvested in
additional shares of the Fund automatically or paid in cash by making the
appropriate election on your account application.  You may change your election
at any time by providing written notice to State Street.


                            1.  AUTOMATIC DIVIDEND REINVESTMENT PLAN.  The Fund
                            automatically reinvests all income dividends and
                            capital gain distributions in additional shares of
                            a portfolio's stock at net asset value on the
                            reinvestment date.  (For more information, see
                            "Dividend and Distribution Policy.")
                          

                            2.  CASH-DIVIDEND PLAN.  You may choose to have all
                            of your income dividends paid in cash and/or have
                            your capital gain distributions paid in cash.  Any
                            distributions you do not elect to have paid in cash
                            will be reinvested automatically in additional
                            shares of the Fund at net asset value.

                            3.  AUTOMATIC DEPOSIT OF DIVIDENDS.  You may elect
                            to have all income dividends and capital gain
                            distributions automatically deposited in a
                            previously established bank account.

AUTOMATIC INVESTMENT PLAN.  On your account application, you may authorize
State Street to automatically withdraw an amount of money (MINIMUM $250) from
your bank account on the fifth or twentieth day of each month.  This amount
will be invested in additional shares.  You may change your election at any
time by providing written notice to State Street.

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



                                       24
<PAGE>   34
YOUR ACCOUNT-CONTINUED
================================================================================


MINIMUM INVESTMENTS

Initial Investment      $2,000
Subsequent Investments  $1,000

SYSTEMATIC WITHDRAWAL PLAN.  You may establish this plan with shares presently
held or through a new investment, which the Fund suggests be at least $5,000.
Under this plan, you specify a dollar amount to be paid monthly, quarterly or
annually.  Shares corresponding to the specified dollar amount are
automatically redeemed from your account on the fifth business day preceding
the end of the month, quarter or year.  While this plan is in effect, all
income dividends and capital gain distributions on shares in your account will
be reinvested at net asset value in additional shares.  There is no charge for
withdrawals, but the MINIMUM WITHDRAWAL IS $250 PER MONTH.  Depending upon the
size of payments requested, and fluctuations in the net asset value of the
shares redeemed, redemptions under this plan may reduce or even exhaust your
account.

RETIREMENT PLANS. The Fund offers a variety of qualified retirement plans,
including Individual Retirement Accounts ("IRAs"), Simplified Employee Pension
Plans ("SEPs") and other qualified retirement plans.  Additional information
concerning such plans is available from the Fund.

The minimum initial retirement plan investment is $2,000 and the minimum
subsequent investment is $1,000.  State Street may act as custodian for the
portfolio's IRAs and certain other qualified retirement plans.  State Street
charges a $5 plan establishment fee, an annual $15 custodial fee and a $10 fee
for each lump sum distribution from a plan.  These fees may be waived under
certain circumstances.
With regard to retirement plans:

                            -   participation is voluntary;
                            -   you may terminate or change a plan at any time
                                without penalty or charge from the Fund;
                            -   the Fund will pay any additional expenses that
                                it incurs in connection with such plans;
                            -   on your account application you may select a
                                plan or plans in which to invest;
                            -   additional forms and further information may be
                                obtained by writing or calling the Fund;
                            -   the Fund reserves the right to change the
                                minimum amounts for initial and subsequent
                                investments or to terminate any of the plans;
                            -   the Fund reserves the right to waive investment
                                minimums at the discretion of the Distributor;
                                and
                            -   the Fund requires a copy of the trust agreement
                                when shares are to be held in trust.

CONSULTATION WITH A PROFESSIONAL TAX ADVISER IS RECOMMENDED, both because of
the complexity of Federal tax laws and because various tax penalties are
imposed for excess contributions to, and late or premature distributions from,
IRAs or other qualified retirement plans.  Termination of a plan shortly after
its adoption may have adverse tax consequences.

SHAREHOLDER RIGHTS.  All shares of each portfolio have equal rights with
respect to dividends, assets and liquidation of a portfolio and equal,
noncumulative voting rights.  Noncumulative voting rights allow the holder or
holders of a majority of shares, voting together for the election of directors,
to elect all the directors.  All shares of each portfolio will be voted in the
aggregate, except when a separate vote by portfolio is required under the
Investment Company Act of 1940.  Shares are fully paid and nonassessable when
issued, are transferable without restriction and have no preemptive or
conversion rights.  Under Maryland law, the Fund is not required to hold
shareholder meetings on an annual basis.  As required by law, the Fund will,
however, hold
- --------------------------------------------------------------------------------




                                       25
<PAGE>   35
YOUR ACCOUNT-CONTINUED
================================================================================
shareholder meetings when a sufficient number of shareholders request a
meeting, or as deemed desirable by the Board of Directors, for such purposes as
electing or removing directors, changing fundamental policies or approving an
investment management agreement.  (For additional information about shareholder
voting rights, see the Statement of Additional Information.)





                                       26
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YOUR ACCOUNT-CONTINUED
================================================================================
DIVIDEND AND DISTRIBUTION POLICY



INCOME DIVIDENDS
Each portfolio earns dividends from stocks and interest from bond, money
market, and other investments, which are passed along to shareholders as income
dividends.


CAPITAL GAIN DISTRIBUTIONS
The Fund realizes capital gains whenever it sells securities for a higher price
than it paid for them, which are passed along to shareholders as capital gain
distributions.


As a Fund shareholder, you are entitled to your portion of the Fund's net
income and gains on its investments.  The Fund passes its earnings along to you
as distributions.  The Fund's policy is to distribute substantially all net
investment income and all net realized capital gain, if any.   All
distributions of income and capital gain and any return of capital have the
effect of immediately thereafter decreasing net asset value per share.  Income
dividends and capital gain distributions will be automatically reinvested in
additional shares at net asset value on the reinvestment date, which is
generally the fifteenth day of each month if a business day, unless you
specifically request otherwise (see "Dividend Options" under "Shareholder
Services and Rights").  Cash payments are made by the Fund's Dividend Paying
Agent, State Street Bank and Trust Company, shortly following the reinvestment
date.

WHEN DIVIDENDS ARE PAID FOR EACH PORTFOLIO

                            - For the GROWTH FUND, VALUE DISCOVERY FUND and the
                            INTERNATIONAL GROWTH FUND, all income dividends, if
                            any, and capital gain distributions, if any, will
                            generally be paid in December and/or January.

                            - For the INCOME FUND, income dividends are
                            normally paid monthly, with net realized long-term
                            capital gain distributions, if any, generally being
                            paid in December and/or in January.  The Fund
                            attempts to maintain relatively level monthly
                            dividends for the Income Fund and therefore, from
                            time to time, may distribute or retain net
                            investment income and capital gain or make a return
                            of capital distribution in order to pursue that
                            goal.

                            - For the READY RESERVES FUND, on each day that the
                            Fund is open for business, the portfolio's net
                            investment income will be declared at 3:00 p.m.,
                            Chicago time, as a dividend to shareholders who
                            were of record prior to the declaration.

The Fund may vary these dividend practices at any time.  Income dividends and
any capital gain distributions on all five portfolios will vary from year to
year.  Dividends and distributions may be subject to withholding as required by
the Internal Revenue Service (see "Taxes").
- --------------------------------------------------------------------------------




                                       27
<PAGE>   37
YOUR ACCOUNT-CONTINUED
================================================================================
TAXES

As with any investment, you should consider how your investment in the Fund
will be taxed.  If your account is not a tax-deferred retirement account, you
should be aware of these tax implications.

TAXES ON DISTRIBUTIONS.  Distributions are subject to Federal income tax and
may also be subject to state or local taxes.  Your distributions are taxable
when they are paid, whether you take them in cash or reinvest them in more
shares of the Fund.  However, dividends declared by the Fund in October,
November or December to shareholders of record as of a date in one of those
months and paid before the following February 1 are treated as having been paid
on December 31 of the calendar year declared for Federal income tax purposes.
The Fund will inform you of the amount and nature of distributions paid.

Under the Federal tax laws, each portfolio's income dividends and short-term
capital gains distributions are taxed as ordinary income.  Long-term capital
gain distributions are taxed as long-term capital gains.  It is anticipated
that a portion of the ordinary income dividends for the Growth Fund and the
Value Discovery Fund will be eligible for the dividends-received deduction
available for corporate shareholders.  The ordinary income dividends of
International Growth Fund, Income Fund and Ready Reserves Fund are not eligible
for the dividends-received deduction available to corporate shareholders.

TAXES ON TRANSACTIONS.  Your redemptions--including exchanges for shares of
other Fund portfolios--are subject to capital gains tax.  A capital gain or
loss is the difference between the price that you paid for your shares and the
price that you receive when you sell them.  For the Ready Reserves Fund, so
long as a net asset value of $1.00 is maintained, the sale or redemption of
your shares will not result in a capital gain or loss. Any loss recognized on
the redemption of Fund shares held six months or less will be treated as a
long-term capital loss to the extent you have received any long-term capital
gain dividends on such shares.  A shareholder that redeems shares of the Fund
will recognize a capital gain or loss for Federal income tax purposes.  If you
realize a loss on the redemption of  portfolio shares within 30 days before or
after redemption, the two transactions may be subject to the wash sale rules of
the Internal Revenue Code, resulting in a postponement of the recognition of
such loss for federal income tax purposes.

"BUYING A DIVIDEND."  If you buy Fund shares before a portfolio deducts
a distribution from its net asset value, you will pay the full price for the
shares and then receive a portion of the price back in the form of a taxable
distribution.  See "Dividend and Distribution Policy" for payment schedules,
and call the Distributor if you have further questions.

EFFECT OF FOREIGN TAXES.  Investment income received from sources within
foreign countries may be subject to foreign income taxes, which generally will
reduce the Fund's distributions.  However, the United States has entered into
tax treaties with many foreign countries that entitle certain investors to a
reduced rate of tax or to certain exemptions from tax.  Accordingly, the
International Growth Fund will operate so as to qualify for such reduced tax
rates or tax exemptions whenever practicable.

For a more detailed discussion of taxes, see the Statement of Additional
Information.
- --------------------------------------------------------------------------------




                                       28
<PAGE>   38
YOUR ACCOUNT-CONTINUED
================================================================================
DETERMINATION OF NET ASSET VALUE

NET ASSET VALUE ("NAV")
The market value of a mutual fund's total assets, minus liabilities, divided by
the number of shares outstanding is its net asset value.  The value of a single
share is called its share value or share price.




WHEN AND HOW NET ASSET VALUE IS DETERMINED FOR THE PORTFOLIOS

Net asset value per share for the Growth Fund, the Value Discovery Fund and the
International Growth Fund will be determined as of the close
of trading, generally 3:00 p.m., Chicago time (4:00 p.m. Eastern time), on the
New York Stock Exchange.  Net asset value is computed on any day when the
Exchange is open. For the Income Fund and Ready Reserves Fund, net asset
value is calculated as of 3:00 p.m., Chicago time, on days when New York banks
are open for business (except Good Friday).  Net asset value will not be
computed on a day when no orders to purchase shares were received and no shares
were tendered for redemption.

When net asset value is computed, quotations of foreign securities in foreign
currencies are converted into the United States dollar equivalents at the
prevailing market rates as computed by Investors Bank & Trust Company, the
Fund's custodian.  Trading in securities on exchanges and over-the-counter
markets in Europe and the Far East is normally completed at various times prior
to 3:00 p.m., Chicago time, the current closing time of the New York Stock
Exchange.  Trading on foreign exchanges may not take place on every day that
the New York Stock Exchange is open.  Conversely, trading in various foreign
markets may take place on days when a New York Stock Exchange is not open and
on other days when a portfolio's net asset value is not calculated.
Consequently, calculation of the net asset value for the International Growth
Fund may not occur at the same time as determination of the most current market
prices of the securities included in the calculation, and the value of the net
assets held by the International Growth Fund may be significantly affected on
days when shares are not available for purchase or redemption.

For the purposes of calculating the net asset value of the Ready Reserves Fund,
portfolio securities are valued at their amortized cost, which means their
acquisition cost adjusted for the amortization of  a premium or discount.

HOW THE MARKET VALUE OF PORTFOLIO SECURITIES IS DETERMINED

DOMESTIC EQUITY SECURITIES.  The market value of portfolio domestic equity
securities is determined by valuing securities traded on national securities
markets at the last sale price or, in the absence of a recent sale on the date
of determination, at the latest bid price.  Securities traded only on the
over-the-counter market are valued at the latest bid price.

FOREIGN EQUITY SECURITIES.  The value of a foreign equity security is
determined based upon the last sale price on the foreign exchange or market on
which it is primarily traded and in the currency of that market, as of the
close of the appropriate exchange or, if there have been no sales during that
day, at the latest bid price.

FIXED-INCOME SECURITIES.  Fixed-income securities are valued by using market
quotations, independent pricing services that use prices provided by
market-makers or matrixes producing estimates of market values obtained from
yield data relating to instruments or securities with similar characteristics.

OTHER SECURITIES AND ASSETS.  Other securities, and all other assets, are
valued at a fair value as determined in good faith by, or under the direction
of, the Board of Directors.
- --------------------------------------------------------------------------------




                                       29
<PAGE>   39
YOUR ACCOUNT-CONTINUED
================================================================================
OTHER
IMPORTANT INFORMATION




WRITTEN CONFIRMATIONS.  Each purchase, exchange or redemption transaction is
confirmed in writing to the address of record by giving details of the purchase
or redemption.

CERTIFICATED SHARES.  In the interest of safekeeping and expediting transfers
and redemptions, most shareholders prefer not to receive certificates for their
shares.  Rather, the value of the shares is represented by your account
balance.  The Fund will, however, issue certificated shares upon your written
request.  Unless payment for shares is made by certified or cashier's check, a
share certificate will not be issued until thirty days after your purchase is
completed.

USE OF INTERMEDIARIES.  If you purchase or redeem shares of the Fund through an
investment dealer, bank or other institution, that institution may impose
charges for its services.  These charges would reduce your yield or return.
You may purchase or redeem shares of the Fund directly from the Fund or with
the Fund's Transfer Agent, State Street Bank, without any such charges.

TRANSFER OF SHARES.  Fund shares may be transferred by a written request
addressed to the Fund and delivered to State Street giving the name and social
security or taxpayer identification number of the transferee and accompanied by
the same signature guarantees and documents as would be required for a
redemption, together with specimen signatures of all transferees.

SUSPENSION OF OFFERING.  The Fund reserves the right to withdraw all or any
part of the offering made by this Prospectus and the Fund or the Distributor
may reject purchase orders.  From time to time, the Fund may temporarily
suspend the offering of its shares to new investors.  During the period of such
suspension, persons who are already  shareholders of a portfolio may be
permitted to continue to purchase additional shares of the portfolio, to have
dividends reinvested and to make redemptions.

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



                                       30
<PAGE>   40
MANAGEMENT OF THE FUND  o

BOARD OF DIRECTORS
Responsibility for overall management of the Fund rests with its directors and
officers.  Their duties include supervising the business affairs of the Fund,
monitoring investment activities and practices and considering and acting upon
future plans for the Fund. The business affairs and investments of the Fund are
managed on a day-to-day basis by the Fund's Adviser, William Blair & Company,
L.L.C.

THE ADVISER
William Blair & Company, L.L.C., 222 West Adams Street, Chicago, Illinois
60606, is the investment adviser and manager of the Fund and provides the Fund
with continuous professional investment supervision. The Adviser is also the
principal underwriter and distributor of the Fund and acts as agent of the Fund
in the sale of its shares. William Blair & Company, L.L.C. was founded over 60
years ago by William McCormick Blair. Today, the firm has more than 100
principals and 600 employees. The main office in Chicago houses all research
and investment management services.

The Investment Management Department oversees the assets of the five William
Blair mutual funds, along with corporate pension plans, endowments and
foundations and individual accounts. The department currently manages over $7.8
billion in equities, fixed-income securities and cash equivalents.

The Adviser firmly believes that clients are best served when portfolio
managers are encouraged to draw on their experience and develop new ideas. This
philosophy has helped build a hard-working, results-oriented team of over 20
portfolio managers, supported by over 25 analysts, with an exceptionally low
turnover rate. William Blair portfolio managers average more than ten years
with William Blair and more than two decades experience in the investment
industry.  The Adviser is registered as an investment adviser under the
Investment Advisers Act of 1940.

Pursuant to its management agreement, the Adviser directs the investment of the
assets of the Fund and is responsible for the overall management of the
business affairs of the portfolios, subject to the supervision of the Fund's
Board of Directors. The Adviser's duties include determining which investments
to buy and sell, placing brokerage orders and negotiating the terms of
securities transactions on behalf of the Fund. It also provides various other
services and facilities.

MANAGEMENT FEES

GROWTH FUND.  The Growth Fund pays the Adviser a monthly management advisory
fee at an annual rate of .75% of the average daily net assets of the portfolio.

VALUE DISCOVERY FUND.  The Value Discovery Fund pays the Adviser a monthly
management advisory fee at an annual rate of 1.15% of the average daily net
assets of the portfolio.  The management fee is greater than that paid by most
mutual funds.

INTERNATIONAL GROWTH FUND.  The International Growth Fund pays the Adviser a
monthly management advisory fee at an annual rate of 1.10% of the first $250
million of average daily net assets of the portfolio and 1.00% of average daily
net assets above $250 million. The management fee is greater than that paid by
most mutual funds.





                                       31
<PAGE>   41
INCOME FUND.  The Income Fund  pays the Adviser a monthly management advisory
fee at an annual rate of .25% of the first $250 million of average daily net
assets of the portfolio and .20% of average daily net assets in excess of $250
million, plus 5.0% of the gross income earned.  This fee structure results in
higher compensation to the Adviser when higher income is achieved, including
the higher income that is available from riskier securities.

READY RESERVES FUND.  The Ready Reserves Fund pays the Adviser a monthly
management advisory fee at an annual rate of .625% of the first $250 million of
average daily net assets of the portfolio, .60% of the next $250 million, .575%
of the next $2 billion and .55% of the average daily net assets in excess of
$2.5 billion.
   
EXPENSES
The Fund's expenses include the management advisory fees; transaction costs;
interest; taxes; legal, accounting, auditing, transfer agency and custodial
fees and certain other operational expenses.  During the Value Discovery Fund's
first year of operation, the Adviser has voluntarily agreed to waive the
advisory fee and to absorb other operating expenses if total operating expenses
exceed 1.50% of the portfolio's average daily net assets.  In addition, over a  
five-year period following the portfolio's commencement of operations the 
International Growth Fund and the Value Discovery Fund are reimbursing the
Adviser for expenses (up to $50,000) incurred by the Adviser in establishing
the portfolio.
    
CUSTODIAN, TRANSFER AGENT AND DIVIDEND PAYING AGENT
The Fund's Custodian is Investors Bank and Trust Company, 89 South Street,
Boston, Massachusetts 02205.  The Fund's Transfer Agent and Dividend Paying
Agent is State Street Bank and Trust Company, 225 Franklin Street, Boston,
Massachusetts  02110.

PERFORMANCE o

From time to time, the portfolios may advertise several types of performance
information that are based upon historical results and are not necessarily
representative of the future performance of a portfolio.

Average annual total return is a standard measure of portfolio performance.  It
assumes that any distributions of capital gains or dividends were reinvested
for the period quoted.  Yield is a standard measure of performance for income
funds and money funds.  Yield measures the net investment income per share
earned over a specific 30-day period for income funds and a 7-day period for
money funds.





                                       32
<PAGE>   42
INVESTMENT GLOSSARY   o
- --------------------------------------------------------------------------------
THE FOLLOWING GLOSSARY EXPLAINS SOME OF THE TYPES OF SECURITIES IN WHICH THE
PORTFOLIOS MAY INVEST,  INVESTMENT TECHNIQUES THEY MAY EMPLOY AND SOME OF THEIR
SPECIFIC ASSOCIATED RISKS.  FOR MORE INFORMATION, PLEASE SEE THE FUND'S
STATEMENT OF ADDITIONAL INFORMATION.
- --------------------------------------------------------------------------------
BORROWING.  To a certain extent, each portfolio may borrow money from banks for
limited purposes.   The GROWTH FUND VALUE DISCOVERY FUND AND INTERNATIONAL
GROWTH FUND may borrow up to 10% of their total assets; the INCOME FUND AND
READY RESERVES FUND may borrow up to 5% of their total assets.  Most borrowing
is intended only as a temporary measure for extraordinary or emergency
purposes, such as to help meet redemption requests, and not for leverage
purposes.

COLLATERALIZED OBLIGATIONS.  The INCOME FUND may invest in collateralized
obligations, which are debt securities issued by a corporation, trust or
custodian or by a U.S. Government agency or instrumentality, that are
collateralized by a portfolio or pool of assets, such as mortgages,
mortgage-backed securities, debit balances on credit card accounts or U.S.
Government securities.  The issuer's obligation to make interest and/or
principal payments is secured by the underlying pool or portfolio of
securities.  

A variety of types of collateralized obligations are available
currently, and others may become available in the future.  Some obligations are
for the guaranteed payment of only principal (the principal-only or "PO" class)
or only interest (the interest-only or "IO" class), while others are for the
guaranteed payment of both, or some variation thereof.  The yields to maturity
on PO and IO class  obligations are more sensitive than other obligations, with
the IO class obligations being extremely sensitive to the rate of principal
payments  (including prepayments) on the related underlying assets.  The
portfolio will invest only in PO and IO class mortgage obligations
collateralized by securities guaranteed by the U.S. Government.  Some types of
collateralized obligations may be less liquid than other types of securities.
Investments in collateralized obligations that are deemed to be illiquid, which
includes PO and IO class mortgage obligations, will be subject to the 15%
limitation on illiquid assets.

The mortgage-backed collateralized obligations in which the portfolio may
invest include pools of mortgage loans assembled for sale to investors by
various governmental agencies such as the Government National Mortgage
Association ("GNMA") and government-related organizations such as the Federal
National Mortgage Association ("FNMA") and the Federal Home Loan Mortgage
Corporation ("FHLMC").  Payments of principal and/or interest on such
mortgages, including prepayments, are guaranteed by the agency or       
instrumentality.  The agencies and instrumentalities are subject to varying
degrees of support by the U.S. Government.  The effective credit quality of
collateralized obligations is the credit quality of the collateral.  The
requirements as to collateralization are determined by the issuer or sponsor of
the collateralized obligation in order to satisfy rating agencies. These
collateralized obligations generally have excess collateral, but typically any
guarantee is limited to a specified percentage of the pool of assets.

The potential for appreciation in the event of a decline in interest rates may
be limited or negated by increased principal prepayments by certain
mortgage-backed securities,





                                       33
<PAGE>   43
such as GNMA Certificates and other collateralized obligations. During periods
of declining interest rates, mortgages underlying the security are prone to
prepayment, causing the security's effective maturity to be shortened.
Prepayment of high interest rate mortgage-backed securities during times of
declining interest rates will tend to lower the return of the portfolio and may
even result in losses to the portfolio if the prepaid securities were acquired
at a premium.  Because mortgage-backed securities tend to be sensitive to
prepayment rates on the underlying collateral, their value to the portfolio is
dependent upon the accuracy of the prepayment projections used, which are a
consensus derived from several major securities dealers.  The duration of many
mortgage backed securities changes substantially in response to changes in 
interest rates and prepayment rates.
DEPOSITORY RECEIPTS.  The GROWTH FUND, VALUE DISCOVERY FUND and INTERNATIONAL
GROWTH FUND may invest in foreign issuers through sponsored American Depository 
Receipts ("ADRs"), European Depository Receipts ("EDRs") and Global Depository
Receivables ("GDRs").  Generally an ADR is a dollar-denominated security issued
by a U.S. bank or trust company that represents, and may be converted into, the
underlying foreign security,  an EDR represents a similar securities
arrangement but is issued by a European bank and a GDR is issued by a
depository.  ADRs, EDRs and GDRs may be denominated in a currency different
from the underlying securities into which they may be converted.  Typically,
ADRs, in registered form, are designed for issuance in U.S. securities markets
and EDRs and GDRs, in bearer form, are designed for issuance in European
securities markets. Investments in depository receipts entail risks similar to
direct investments in foreign securities. These risks are detailed in the
section on "Investment Risks" under the "International Growth Fund" above and
in the Statement of Additional Information.

DURATION.  For the INCOME FUND, the duration of an instrument is different from
the maturity of an instrument in that duration measures the average period      
remaining until the discounted value of the amounts due (principal and
interest) under the instrument are to be paid, rather than by the instrument's
stated final maturity.  For example, a portfolio duration of five years means
that, if interest rates increased by one percent, the value of the portfolio
would decrease approximately by five percent.  Modified duration adjusts
duration to take into account the yield to maturity and the number of coupons
received each year.  For purposes of calculating duration, instruments allowing
prepayment will be assigned a maturity schedule by the Adviser based upon
general experience.

CONCENTRATION.  Each portfolio does not intend to invest more than 25% of its
total asset in any one industry; however, the Ready Reserves Fund may invest
more than 25% of its total assets in the domestic banking industry.  These
limitations do not apply to U.S. Government securities or government agency
securities, or to instruments, such as repurchase agreements, secured by these
instruments.

DIVERSIFICATION.  As a matter of fundamental policy, each portfolio will not
purchase the securities of any issuer if, as a result, more than 5% of its
total assets would be invested in such issuer.  For the Value Discovery Fund,
that limitation applies to 75% of the portfolio's net assets.  In addition,
each portfolio will not purchase more than 10% of the outstanding voting
securities of any issuer. These limitations do not apply to U.S. Government
securities or to government agency or instrumentality securities.

EXEMPTIVE RELIEF.  Based upon exemptive relief obtained by the INTERNATIONAL
GROWTH FUND under the 1940 Act, a portion of the equity and convertible
securities that may be acquired by the portfolio may be issued by foreign
companies that, in each of their most recent fiscal years, derived more than
15% of their gross revenues from their activities as a broker, a dealer, an
underwriter or an investment adviser.

FOREIGN CURRENCY FUTURES.  The INTERNATIONAL GROWTH FUND may purchase and sell
futures on foreign currencies as a hedge against possible variation in foreign
exchange rates. Foreign currency futures contracts are traded on boards of
trade and futures





                                       34
<PAGE>   44
exchanges.  A futures contract on a foreign currency is an agreement between
two parties to buy and sell a specified amount of a particular currency for a
particular price on a future date.  To the extent that the portfolio engages in
foreign currency futures transactions, but fails to consummate its obligations
under the contract, the net effect to the portfolio would be the same as
speculating in the underlying futures contract. Futures contracts entail
certain risks.  If the Adviser's judgment about the general direction of
interest rates or markets is wrong, the portfolio's overall performance may be
less than if no such contracts had been entered into. There may also be an
imperfect correlation between movements in prices of futures contracts and the
portfolio securities being hedged.  In addition, the market prices of futures
contracts may be affected by certain factors.  If participants in the futures
market elect to close out their contracts through offsetting transactions
rather than meet margin requirements, distortions in the normal relationship
between the securities and futures markets could result.  In addition, because
margin requirements in the future markets are less onerous than margin
requirements in the cash market, increased participation by speculators in the
futures market could cause temporary price distortions.  Due to price
distortions in the futures market and an imperfect correlation between
movements in the prices of securities and movements in the prices of futures
contracts, a correct forecast of market trends by the portfolio's Adviser may
still not result in a successful hedging transaction.  The portfolio could also
experience losses if it could not close out its futures position because of an
illiquid secondary market, and losses on futures contracts are not limited to
the amount invested in the contract.  The above circumstances could cause the
portfolio to lose money on the financial futures contracts and also on the
value of its portfolio securities.

To the extent required to comply with the 1940 Act and the rules and
interpretations thereunder, whenever the portfolio enters into a futures
contract, the portfolio will maintain a segregated account consisting of either
cash or liquid securities equal to the portfolio's potential obligation under
such contracts. The segregation of assets places a practical limit on the
extent to which the portfolio may engage in futures contracts.

To the extent required to comply with CFTC Rule 4.5 and in order to avoid
"commodity pool operator" status, the portfolio will not enter into a financial
futures contract if immediately thereafter the aggregate initial margin and
premiums for such contracts held by the portfolio would exceed 5% of the
liquidation value of the portfolio's assets.  The portfolio will not engage in
transactions in financial futures contracts for speculation, but only in an
attempt to hedge against changes in interest rates or market conditions
affecting the value of securities that the portfolio holds or intends to
purchase.  

FOREIGN SECURITIES. Securities of foreign companies may entail risks not
associated with domestic securities. The prices of such securities may be more
volatile, there may be less publicly available information about foreign
issuers and many foreign issuers are not subject to uniform accounting,
auditing and financial reporting standards comparable to those applicable to
domestic issuers. These risks are detailed in the section on "Investment Risks"
under the "International Growth Fund" above and in the Statement of Additional
Information.

FORWARD FOREIGN CURRENCY TRANSACTIONS.  The INTERNATIONAL GROWTH FUND may enter
into forward foreign currency contracts as a means of managing the risks
associated with changes in exchange rates.  A forward foreign currency contract
is an agreement to exchange U.S. dollars for foreign currencies at a specified
future date and specified amount which is set by the parties at the time of
entering into the contract.  The Adviser will generally use such currency
contracts to fix a definite price for





                                       35
<PAGE>   45
securities they have agreed to buy or sell and may also use such contracts to
hedge the portfolio's investments against adverse exchange rate changes.
Alternatively, the portfolio may enter into a forward contract to sell a
different foreign currency for a fixed U.S. dollar amount where the Adviser
believes that the U.S. dollar value of the currency to be sold pursuant to the
forward contract will fall whenever there is a decline in the U.S. dollar value
of the currency in which securities of the portfolio are denominated
("cross-hedge").  The profitability of forward foreign currency transactions
depends upon correctly predicting future changes in exchange rates between the
U.S. dollar and foreign currencies.  As a result, the portfolio may incur
either a gain or loss on such transactions.  While forward foreign currency
transactions may help reduce losses on securities denominated in a foreign
currency, they may also reduce gains on such securities depending on the actual
changes in the currency's exchange value relative to that of the offsetting
currency involved in the transaction.  The portfolio will not enter into
forward foreign currency transactions for speculative purposes.

ILLIQUID SECURITIES. The GROWTH FUND, VALUE DISCOVERY FUND, INTERNATIONAL
GROWTH FUND AND INCOME FUND may each invest up to 15% of its net assets in
illiquid securities. The Ready Reserves Fund may invest up to 10% of its net
assets in illiquid securities.  Illiquid securities are those securities
that are not readily marketable, including restricted securities and repurchase
obligations maturing in more than seven days.
INVESTMENT COMPANIES.  Subject to the provisions of the 1940 Act, the
GROWTH FUND, VALUE DISCOVERY FUND AND INTERNATIONAL GROWTH FUND, may each
invest in the shares of investment companies.  Investment in other investment
companies may provide advantages of diversification and increased liquidity;
however, there may be duplicative expenses, such as advisory fees or custodial
fees.  At the present time, each portfolio intends to limit its investment in
other investment companies, to no more than 10% of its total assets. 
Investments in foreign investment companies may be desirable for the
International Growth Fund and the Value Discovery Fund because several
foreign governments permit investments by non-residents in their markets only
through participation in certain investment companies specifically organized to
participate in such markets. In addition, investments in unit trusts and
country funds permit investments in foreign markets that are smaller than those
in which the portfolio would ordinarily invest directly.  Investments in such
pooled vehicles should enhance the geographical diversification of the
portfolio's assets while reducing the risks associated with investing in
certain smaller foreign markets.  Investments in such vehicles will provide
increased liquidity and lower transaction costs than are normally associated
with direct investments in such markets.  
PORTFOLIO TURNOVER RATE.  None of the portfolios intends to trade portfolio
securities for the purpose of realizing short-term profits.  However, each will
adjust its portfolio as considered advisable in view of prevailing or
anticipated market conditions and the portfolio's investment objective, and
there is no limitation on the length of time securities must be held by the
portfolio prior to being sold. Portfolio turnover rate will not be a limiting
factor for a portfolio. Although each portfolio's turnover rate will vary from
year to year, it is anticipated that each portfolio's turnover rate, under
normal circumstances, will be less than 100%. A higher portfolio turnover rate
would involve correspondingly higher transaction costs, which would be borne
directly by each portfolio.

RATINGS.  The READY RESERVES FUND has adopted certain investment policies
designed to limit the market and financial risks of the portfolio.  The
portfolio may only invest in securities that, based on their short-term ratings,
are deemed to be the highest grade, or if unrated, are of equivalent quality in
the judgment of the Adviser, subject to the supervision of the Board of
Directors.  However, the portfolio may invest up to five percent of its total
assets in securities deemed within the second highest grade, or if unrated, are
of equivalent quality.  In addition, portfolio investments will be limited to





                                       36
<PAGE>   46
instruments that the Adviser, under the supervision of the Board of Directors,
has determined present minimal credit risks.  Securities are deemed to be
highest grade if they are rated high quality by two Rating Organizations, or if
only rated by one Rating Organization, rated high quality by that Rating
Organization.  For example, commercial paper rated "Duff 1 minus," "Fitch 1,"
"Prime 1" and "A-1" by Duff & Phelps, Inc., Fitch Investors Service, Inc.,
Moody's Investors Service, Inc., and Standard & Poor's Corporation,
respectively, would be considered high quality.  Obligations that are unrated
are not necessarily of lower quality than those that are rated, but may be less
marketable and, consequently, provide higher yields.  Further, the portfolio
may invest in other corporate obligations maturing in thirteen months or less,
such as publicly traded bonds, debentures and notes, if they are rated within
the two highest grades by a Rating Organization.  For a description of these
ratings, see Appendix B to the Statement of Additional Information.

REAL ESTATE INVESTMENT TRUSTS. The VALUE DISCOVERY FUND may invest up to 15% of
its total assets in real estate investment trusts ("REITs"). REITs are subject
to volatility from risks associated with investments in real estate and
investments dependent on income from real estate, such as fluctuating demand
for real estate and sensitivity to adverse economic conditions. In addition,
the failure of a REIT to continue to qualify as a REIT for tax purposes would
have an adverse effect upon on the value of a portfolio's investment in that
REIT.

REPURCHASE AGREEMENTS.  Each portfolio may invest in repurchase agreements.
Repurchase agreements are instruments under which a portfolio acquires
ownership of a security and the seller, a broker-dealer or a bank,
agrees to repurchase the security at a mutually agreed upon time and price.
The repurchase agreement serves to fix the yield of the security during the
portfolio's holding period.  The portfolios currently intend to enter into
repurchase agreements only with member banks of the Federal Reserve System or
with primary dealers in U.S. Government securities.  In all cases, the Adviser,
subject to the supervision of the Board of Directors, must be satisfied with
the creditworthiness of the seller before entering into a repurchase agreement.
In the event of the bankruptcy or other default of the seller of a repurchase
agreement, the portfolio could incur expenses and delays enforcing its rights
under the agreement and experience a decline in the value of the underlying
securities and loss of income.  The maturity of a security subject to
repurchase may exceed one year, and, for the Income Fund, the modified duration
of a security subject to repurchase may exceed eight years. Repurchase 
agreements maturing in more than seven days, together with any
securities that are restricted as to disposition under the federal securities
laws or are otherwise considered to be illiquid, will not exceed 15% of the net
assets of the Growth Fund, Value Discovery Fund, International Growth Fund and
Income Fund and 10% of the net assets of the Ready Reserves Fund.

SECTION 4(2) PAPER.  The READY RESERVES FUND may invest in commercial paper
issued in reliance upon the so-called "private placement" exemption from
registration afforded by Section 4(2) of the Securities Exchange Act of 1933
("Section 4(2) paper").  Section 4(2) paper is restricted as to disposition
under the Federal securities laws, and generally is sold to institutional
investors such as the portfolio.  Any resale by the purchaser must be in an
exempt transaction.  Section 4(2) paper normally is resold to other
institutional investors through or with the assistance of the issuer or
investment dealers who make a market in the Section 4(2) paper, thus providing
liquidity.  The Adviser considers the legally restricted but readily saleable
Section 4(2) paper to be liquid; however, pursuant to the procedures approved
by the Fund's Board of Directors,





                                       37
<PAGE>   47
if a particular investment in Section 4(2) paper is not determined to be
liquid, that investment will be included within the limitation on illiquid
securities.  The Adviser monitors the liquidity of each investment in Section
4(2) paper on a continuing basis.

WHEN-ISSUED AND DELAYED DELIVERY SECURITIES.  From time to time, in the
ordinary course of business, each portfolio may purchase newly-issued
securities appropriate for the portfolio on a "when-issued" basis and may
purchase or sell securities appropriate for the portfolio on a "delayed
delivery" basis.  When-issued or delayed delivery transactions involve a
commitment by the portfolio to purchase or sell particular securities with
payment and delivery to take place at a future date. These transactions allow
the portfolio to lock in an attractive purchase price or yield on a security
the portfolio intends to purchase. Normally, settlement occurs within one month
of the purchase or sale. During the period between purchase and settlement, no
payment is made or received by the portfolio and, for delayed delivery
purchases, no interest accrues to the portfolio. Because the portfolio is
required to set aside cash or liquid securities at least equal in value to its
commitments to purchase when-issued or delayed delivery securities, the
Adviser's ability to manage the portfolio's assets may be affected by such
commitments. The portfolio will only make commitments to purchase securities on
a when-issued or delayed delivery basis with the intention of actually
acquiring the securities, but it reserves the right to sell them before the
settlement date if deemed advisable.

VARIABLE RATE SECURITIES. The READY RESERVES FUND may invest in instruments
having rates of interest that are adjusted periodically or that "float"
continuously or periodically according to formulae intended to minimize
fluctuation in values of the instruments ("Variable Rate Securities").  The
interest rate on a Variable Rate Security is ordinarily determined by reference
to, or is a percentage of, an objective standard such as a bank's prime rate,
the 90-day U.S. Treasury Bill rate or the rate of return on commercial paper
or bank certificates of deposit.  Generally, the changes in the interest rates
on Variable Rate Securities reduce the fluctuation in the market value of such
securities.  Accordingly, as interest rates decrease or increase, the potential
for capital appreciation or depreciation is less than for fixed-rate
obligations.  Further, the portfolio may invest in Variable Rate Securities
that have a demand feature entitling the portfolio to resell the securities to
the issuer or a third party at an amount approximately equal to the principal
amount thereof plus accrued interest ("Variable Rate Demand Securities").  As
is the case for other Variable Rate Securities, the interest rate on Variable
Rate Demand Securities varies according to some objective standard intended to
minimize fluctuation in the values of the instruments.  Many of these Variable
Rate Demand Securities are unrated, their transfer is restricted by the issuer
and there is little if any secondary market for the securities.  Thus, any
inability of the issuers of such securities to pay on demand could adversely
affect the liquidity of these securities.  The portfolio determines the
maturity of Variable Rate Securities in accordance with Securities and Exchange
Commission rules, allowing the portfolio to consider certain of such
instruments as having maturities shorter than the maturity date on the face of
the instrument if they are guaranteed by the U.S. Government or its agencies,
they have a stated maturity date of one year or less or they have demand
features prior to maturity.





                                       38
<PAGE>   48
[back cover]

FOR MORE INFORMATION  o

If you would like additional information about the William Blair Mutual Funds,
please request a free copy of the current annual/semi-annual report or
Statement of Additional Information.


THE ANNUAL AND SEMI-ANNUAL REPORTS TO SHAREHOLDERS include financial
statements, detailed performance information, portfolio holdings, a statement
from the portfolio manager and the auditor's report.  Shareholder reports are
incorporated by reference into this Prospectus, which means that they are part
of this Prospectus for legal purposes.


THE STATEMENT OF ADDITIONAL INFORMATION contains more detailed information
about the Fund and the portfolios.  The current Statement of Additional
Information has been filed with the Securities and Exchange Commission and is
incorporated by reference into this Prospectus, which means that it is part of
this Prospectus for legal purposes.

A copy of the current annual or semi-annual report or Statement of Additional
Information may be obtained without charge by writing or calling the Fund.


WILLIAM BLAIR MUTUAL FUNDS, INC.
222 West Adams Street
Chicago, Illinois 60606
(312) 364-8000

OR

STATE STREET BANK AND TRUST COMPANY
(the Fund's Transfer Agent)
P.O. Box 9104
Boston, MA 02266-9104
1-800-635-2886
(Massachusetts 1-800-635-2840)





No person has been authorized to give any information or to make any
representations not contained in this Prospectus and, if given or made, such
information or representations must not be relied upon as having been
authorized by the Fund or its distributor. The Prospectus does not constitute
an offering by the Fund or its distributor in any jurisdiction in which such
offering may not lawfully be made.





                                       39
<PAGE>   49

   
The following information supplements Statement of Additional Information for
the William Blair Mutual Funds, Inc.  Please file this Supplement with your
records.


                       WILLIAM BLAIR MUTUAL FUNDS, INC.
              Supplement to Statement of Additional Information
                              dated May 1, 1997


Financial Information of the Fund

The Value Discovery Fund's unaudited financial statements for the five-month
period ended May 31, 1997, are incorporated herein by reference.

















                The date of this Supplement is June 17, 1997.


    
<PAGE>   50

                        WILLIAM BLAIR & COMPANY, L.L.C.

                        WILLIAM BLAIR MUTUAL FUNDS, INC.
                             222 WEST ADAMS STREET
                            CHICAGO, ILLINOIS  60606
                                 (312) 364-8000

                      STATEMENT OF ADDITIONAL INFORMATION

This Statement of Additional Information is not a prospectus.  It should be
read in conjunction with the Prospectus of William Blair Mutual Funds, Inc.
(the "Fund") dated May 1, 1997.  The Prospectus may be obtained without charge
by writing or calling the Fund.
                             ______________________
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                                                     PAGE
                                                                                                                     ----
<S>                                                                                                                   <C>
MANAGEMENT OF THE FUND  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
         Investment Adviser and Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
         Directors and Officers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
         Brokerage and Portfolio Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7

INVESTMENT POLICIES AND RESTRICTIONS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         The Growth Fund  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
         Value Discovery Fund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
         International Growth Fund  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
         Income Fund  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
         Ready Reserves Fund  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13

INVESTMENT PRACTICES  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         Collateralized Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
         Foreign Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
         Forward Foreign Currency Transactions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
         Foreign Currency Futures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
         Futures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  21
         Illiquid Securities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Lending  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Repurchase Agreements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
         Restricted Securities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Small Companies  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         Warrants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
         When-Issued or Delayed Delivery Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23

GENERAL FUND INFORMATION  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Redemptions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Determination of Net Asset Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
         Performance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
         Tax Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         Retirement Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  31
         Independent Auditors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Custodian  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Transfer Agent Services  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
         Reports to Shareholders  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

SHAREHOLDER RIGHTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

FUND HISTORY  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33

FINANCIAL INFORMATION OF THE FUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

APPENDIX A  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

APPENDIX B  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
</TABLE>

                           _________________________

                                  May 1, 1997





<PAGE>   51
                             MANAGEMENT OF THE FUND


INVESTMENT ADVISER AND DISTRIBUTOR.  As stated in the Prospectus, William Blair
& Company, L.L.C. ("Adviser") is the Fund's investment adviser and manager.
Pursuant to an investment advisory and management agreement, the Adviser acts
as the Fund's adviser, manages its investments, administers its business
affairs, furnishes office facilities and equipment, provides clerical,
bookkeeping and administrative services, provides shareholder and information
services and permits any of its principals or employees to serve without
compensation as directors or officers of the Fund if elected to such positions.
In addition to the management advisory fee, each portfolio pays the expenses of
its operations, including a portion of the Fund's general administrative
expenses, allocated on the basis of the portfolio's net asset value.  Expenses
that will be borne directly by the portfolios include, but are not limited to,
the following:  the fees and expenses of independent auditors, counsel,
custodian and transfer agent, costs of reports and notices to shareholders,
stationery, printing, postage, costs of calculating net asset value, brokerage
commissions or transaction costs, taxes, registration fees, the fees and
expenses of qualifying the Fund and its shares for distribution under Federal
and state securities laws and membership dues in the Investment Company
Institute or any similar organization.

The advisory agreement for a portfolio continues in effect from year to year
for so long as its continuation is approved at least annually (a) by a majority
of the directors who are not parties to such agreement or interested persons of
any such party except in their capacity as directors of the Fund and (b) by the
shareholders of the portfolio or the Board of Directors.  The agreement may be
terminated at any time upon 60 days' notice by either party; the Fund may so
terminate the agreement either by vote of the Board of Directors or by majority
vote of the outstanding shares of the affected portfolio.  The agreement may
also be terminated at any time either by vote of the Board of Directors or by
majority vote of the outstanding voting shares of the subject portfolio if the
Adviser were determined to have breached the agreement.  The agreement would
terminate automatically upon assignment.  The agreement provides that the
Adviser shall not be liable for any error of judgment or of law, or for any
loss suffered by the Fund in connection with the matters to which the agreement
relates, except a loss resulting from willful misfeasance, bad faith or gross
negligence on the part of the Adviser in the performance of its obligations and
duties, or by reason of its reckless disregard of its obligations and duties
under the agreement.

Upon termination of the agreement and when so requested by the Adviser, the
Fund will refrain from using the name "William Blair" in its name or in its
business in any form or combination.

For the services and facilities furnished to each portfolio, the Fund pays the
Adviser an advisory fee, which is accrued daily and paid monthly on the first
business day of the following month.  The Growth Fund pays an advisory fee at a
rate of .75% of the portfolio's average daily net assets.  Prior to May 1,
1996, the Growth Fund paid an advisory fee at a rate of 0.625% of the
portfolio's average daily net assets up to $75 million and 0.50% of average
daily net assets above $75 million.  For the fiscal years ended December 31,
1996, 1995 and 1994, the Adviser received fees of $3,018,755, $1,561,478 and
$903,986, respectively.

The Value Discovery Fund pays an advisory fee at a rate of 1.15% of the
portfolio's average daily net assets.  For the fiscal year from December 23,
1996 (Commencement of Operations) to December 31, 1996, the Adviser waived fees
of $333.  The Adviser voluntarily has agreed to reimburse the portfolio during
its first year of operation should all operating expenses, including the
compensation of the Adviser but excluding taxes, interest, extraordinary
expenses and brokerage commissions or transaction costs, exceed 1.50% of
average daily net assets of the portfolio.

The International Growth Fund pays an advisory fee at a rate of 1.10% of the
first $250 million of average daily net assets plus 1.00% of average daily net
assets over $250 million.  Prior to May 1, 1996, the International Growth Fund
paid an advisory fee at a rate of 1.10% of the first $100,000,000 of average
daily net assets of the





                                2
<PAGE>   52
portfolio and .95% of average daily net assets above $100,000,000.  Under a
former investment sub-advisory agreement, the Adviser paid a sub-adviser a
monthly fee at an annual rate equal to .40% of the first $100 million of
average daily net assets of the portfolio and .275% of average daily net assets
above $100 million.  For the services and facilities furnished during the
fiscal years ended December 31, 1996, 1995 and 1994, the Adviser received fees
of $1,131,309, $886,557 and $651,754, respectively, of which $303,364 in 1996,
$322,384 in 1995 and $237,001 in 1994 was paid to the sub-adviser.

The Income Fund pays an advisory fee at a rate of .25% of the first $250
million of average daily assets plus .20% of average daily net assets over $250
million plus 5% of the gross income earned by the portfolio.  Prior to May 1,
1996, the Income Fund paid an advisory fee at a rate of .25% of the first $100
million of average daily net assets of the portfolio, .20% of the next $150
million and .15% of average daily net assets in excess of $250 million, plus
5.0% of the gross income earned.  For the services and facilities furnished to
the portfolio pursuant to the advisory agreement during the fiscal years ended
December 31, 1996, 1995 and 1994, the Fund paid $880,815, $868,277 and
$998,125, respectively.

The Ready Reserves Fund pays an advisory fee at a rate of .625% of the first
$250 million of average daily net assets, plus .600% of the next $250 million
of average daily net assets, plus .575% of the next $2 billion of average daily
net assets plus .55% of the average daily net assets over $2.5 billion.  Prior
to May 1, 1996, the Ready Reserves Fund paid an advisory fee at a rate of .625%
of the first $250 million of average daily net assets of the portfolio, .60% of
the next $250 million, .55% of the next $500 million, .50% of the next $2
billion, .45% of the next $2 billion and .40% of average daily net assets in
excess of $5 billion.  For the services and facilities furnished to the
portfolio pursuant to the advisory agreement during the fiscal years ended
December 31, 1996, 1995 and 1994, the Adviser received fees of $4,282,827,
$3,613,262 and $2,990,786, respectively.

The Adviser has agreed to reimburse the Fund should all operating expenses of
the Growth Fund, Income Fund or Ready Reserves Fund, including the compensation
of the Adviser but excluding taxes, interest, extraordinary expenses and
brokerage commissions or transaction costs, exceed 1.50% of the first $30
million of average net assets of the portfolio and 1.00% of average net assets
over $30 million of the portfolio on an annual basis.

William Blair & Company, L.L.C. also is the principal underwriter and
distributor ("Distributor") for shares of the Fund and acts as agent of the
Fund in the sale of its shares.  The offering of shares is continuous, although
the Distributor and the Fund reserve the right to cease the offer of shares at
any time.  The Distributor pays for the printing and distribution of copies of
the prospectus and shareholder reports used in connection with the offering of
shares to prospective investors.  The Distributor also pays for supplementary
sales literature and advertising costs. The foregoing services are provided at
no charge to the Funds. Terms of continuation, termination and
assignment under the underwriting agreement are substantially the same as those
described above with regard to the advisory agreement, except that termination
other than upon assignment or upon determination of breach requires six months'
notice.

Messrs. Barber, Fischer, Fuller and Ms. Gassmann, Messrs. Greig, Kaplan,
Kayser, Kleczka, McMullan, Mitchell, Myer, Sullivan, Truderung and Truettner,
who are directors or officers of the Fund, are also principals or employees of
the Adviser/Distributor as indicated under "Directors and Officers."

The Adviser/Distributor is a limited liability company, the affairs of which
are controlled by all its principals, none of whom owns more than 25% of the
firm.  The Chief Executive Officer of the firm is E. David Coolidge, III and
the Executive Committee is comprised of Harvey Bundy, III, E. David Coolidge,
III, Conrad Fischer, Edgar D. Jannotta, John P. Kayser, Richard P. Kiphart,
Albert J. Lacher, James D. McKinney and James M. McMullan.





                                3
<PAGE>   53
DIRECTORS AND OFFICERS.  The directors and officers of the Fund, their ages,
their principal occupations during the last five years, their affiliations, if
any, with William Blair & Company, L.L.C. and other significant affiliations
are set forth below.  Unless otherwise noted, the address of each officer and
director is 222 West Adams Street, Chicago, Illinois 60606.

CONRAD FISCHER (63),* (2) Chairman of the Board and Director; Principal,
William Blair & Company, L.L.C.; Trustee Emeritus, Chicago Child Care
Society, a non-profit organization.

VERNON ARMOUR (69), (1) (2) (3) Director; 135 South LaSalle St., Suite 1117,
Chicago, Illinois 60603; Private investor; Trustee, Illinois Institute of
Technology, Northwestern Memorial Hospital and OTHO S.A. Sprague Memorial
Institute.

GEORGE KELM (68), (1) (3) Director; 4 Court of Connecticut River, Lincolnshire,
Illinois 60069; Retired Chairman of the Board, Sahara Coal Company, Inc. and
Sahara Enterprises, Inc.; Director, Rolf Jensen & Associates, Inc.; Trustee,
Newberry Library and McCormick Theological Seminary.

ANN P. McDERMOTT (57), (3) Director; 330 Willow Road, Winnetka, Illinois 60093;
Trustee, Rush Presbyterian St. Luke's Medical Center; Women's Board, Rush
Presbyterian St. Luke's Medical Center; Honorary Director, Visiting Nurse
Association; Director, Presbyterian Homes; Northwestern University, Women's
Board; University of Chicago, Women's Board; Director, Washington State
University Foundation.

JAMES M. McMULLAN (62),* Director; Principal, William Blair & Company, L.L.C.;
Director, Securities Industry Association.

JOHN B. SCHWEMM (62), (1) (3) Director; 2 Turvey Lane, Downers Grove, Illinois
60515; Retired Chairman and Chief Executive Officer, R.R. Donnelley & Sons
Company, printer; Director, USG Corp., building material product company
and Walgreen Co., drug store chain.
W. JAMES TRUETTNER, JR. (65),* Director; Principal, William Blair &
Company, L.L.C.; Director, Glenview Foundation and International Travel 
Services.
ROCKY BARBER (45), President of the Fund and Chief Operating Officer of the
Growth Fund, the Value Discovery Fund, the International Growth Fund and the
Income Fund; Principal, William Blair & Company, L.L.C.; Vice President and
Secretary, LaRabida Hospital Foundation; President, Stanford Associates.

MARK A. FULLER, III (40), Senior Vice President; Principal, William Blair &
Company, L.L.C.

W. GEORGE GREIG (44), Senior Vice President; Portfolio Manager, William Blair & 
Co., L.L.C.; former Portfolio Manager, Provident Capital Management; Manager,
Akamai, partnership affiliated with Framlington Investment Management Limited;
Partner, Pilgrim, Baxter & Greig.

GLEN KLECZKA (34), Senior Vice President; Portfolio Manager, William Blair &
Company, L.L.C.; former Partner, Brinson Partners; former Portfolio    
Manager, CNA Financial Corp.

BENTLEY M. MYER (50), Senior Vice President and Chief Operating Officer, Ready
Reserves Fund; Principal, William Blair & Company, L.L.C.; Director, Delnor
Community Hospital.

NORBERT W. TRUDERUNG (44), Senior Vice President; Principal, William Blair &
Company, L.L.C.

JAMES S. KAPLAN (36), Vice President; Associate, William Blair & Company,
L.L.C.; former Vice President, First Union Bank.





                                4
<PAGE>   54
JOHN P. KAYSER (47), Vice President; Principal, William Blair & Company,
L.L.C., Director, DuPage Children's Museum.

TERENCE M. SULLIVAN (53), Vice President and Treasurer; Associate, William
Blair & Company, L.L.C..

JANET V. GASSMANN (30), Secretary; Administrative Assistant, William Blair &
Company, L.L.C.; former Administrative Assistant, Shearson Lehman Brothers,
Inc.

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

*Directors who are interested persons as defined in the Investment Company Act
of 1940.

(1)      Member of the Standing Audit Committee.

(2)      Member of Interim Valuation Committee.  This committee handles any
         questions regarding the valuation of portfolio securities that may
         arise between meetings of the Board of Directors.

(3)      Mr. Armour and Mr. Kelm maintain brokerage accounts with the Adviser
         and Ms. McDermott and Mr. Schwemm employ the Adviser to manage assets
         that they control.  In addition, as a result of his former
         affiliation with the Adviser as a partner of William Blair & Company,
         L.L.C. from 1973 to 1982, Mr. Armour has a beneficial interest in a
         Deferred Profit Sharing Plan that is managed by the Adviser.

The directors and officers affiliated with the Adviser receive no compensation
from the Fund.  Directors who are not affiliated with the Adviser currently
receive an annual fee of $4,000 plus $2,000 for each meeting attended in person
plus expenses.

The following table sets forth the compensation earned from the Fund for the
fiscal year ended December 31, 1996 by directors who are not affiliated with
the Adviser:

<TABLE>
<CAPTION>
                                                  PENSION OR
                             AGGREGATE        RETIREMENT BENEFITS    ESTIMATED ANNUAL
                         COMPENSATION FROM    ACCRUED AS PART OF       BENEFITS UPON      TOTAL COMPENSATION
        DIRECTOR              THE FUND           FUND EXPENSES          RETIREMENT        ------------------
                              --------           -------------          ----------
 <S>                          <C>                      <C>                   <C>                <C>
 Vernon Armour                $14,000                  0                     0                  $14,000

 C. Mathews Dick, Jr.*        $ 4,000                  0                     0                  $ 4,000
 
 George Kelm                  $12,000                  0                     0                  $12,000

 Ann P. McDermott             $12,000                  0                     0                  $12,000
 
 John H. Olwin, M.D.*         $ 4,000                  0                     0                  $ 4,000

 John B. Schwemm              $14,000                  0                     0                  $14,000
 
 John W. Straub*              $ 4,000                  0                     0                  $ 4,000
</TABLE>


________________________________
*Resigned as directors effective as of May 1, 1996.





                                5
<PAGE>   55
The following table provides certain information at January 31, 1997 with
respect to persons known to the Fund to be record holders of 5% or more of the
shares of the following portfolios:


<TABLE>
<CAPTION>
                                                                                            Percent of
 Name and                                                                                  Portfolio's
 Address of                                                                                Outstanding
 Record Owner                                                Number of Shares              Common Stock
 ------------                                                ----------------              ------------
      <S>                                                       <C>                           <C>
      GROWTH FUND
      -----------
      William Blair Employees                                   4,321,004                     11.53%
      Profit Sharing Plan
      222 West Adams Street
      Chicago, IL  60606

      Charles A. Schwab & Company                               3,830,249                     10.21%
      101 Montgomery Street
      San Francisco, CA  94104

      VALUE DISCOVERY FUND
      --------------------
      William Blair & Co., L.L.C.                                200,200                      15.56%
      Ralph G. Portis
      222 West Adams Street
      Chicago, IL  60606

      William Blair & Co., L.L.C.                                197,044                      15.31%
      Catlin Investments L.P.
      222 West Adams Street
      Chicago, IL  60606

      William Blair & Co., L.L.C.                                197,044                      15.31%
      Travis Investments L.P.
      222 West Adams Street
      Chicago, IL  60606


      William Blair & Co., L.L.C.                                100,100                       7.78%
      Elizabeth I. Blair
      222 West Adams Street
      Chicago, IL  60606
</TABLE>


As of January 31, 1997, the Fund's officers and directors as a group owned (or
held or shared investment or voting power with respect to) 779,366 shares or
2.1% of the Growth Fund's stock, 85,049 shares or 6.6% of the Value Discovery
Fund's stock, 397,419 shares or 5.5% of the International Growth Fund's stock,
199,551 shares or 1.4% of the Income Fund's stock and 6,845,640 shares or 0.8%
of the shares of the Ready Reserves Fund.  These figures do not include shares
of the portfolios that may be indirectly owned by certain officers of the Fund
as a result of their interest in the William Blair Profit Sharing Plan.





                                6
<PAGE>   56
BROKERAGE AND PORTFOLIO TRANSACTIONS.  Decisions on portfolio transactions
(including the decision to buy or sell, the appropriate price, allocation of
brokerage, use of a broker as agent or dealer as principal and negotiation of
commissions) normally are made by the Adviser.  In purchasing and selling
portfolio securities, the Fund seeks to obtain the most favorable overall
result, taking into account the net price, the method of execution and research
services provided by the broker.  Such research services include economic
forecasts and analytical, narrative and statistical reports on industries and
companies for consideration by the Fund and the Adviser's other clients.

Portfolio transactions may increase or decrease the return of a portfolio
depending upon the Adviser's ability to correctly time and execute such
transactions.  A portfolio turnover rate for any year is determined by dividing
the lesser of sales or purchases (excluding in either case cash equivalents,
such as short-term corporate notes) by the portfolio's monthly average net
assets and multiplying by 100 (with all securities with maturities and
expirations of one year or less excluded from the computation).  The
portfolio's turnover rate will also vary from year to year depending on market
conditions.  Since the Ready Reserves Fund's assets are invested in securities
with short (less than one year) effective maturities, its portfolio will turn
over many times a year.  Such securities, however, are excluded from the
Securities and Exchange Commission's required portfolio turnover rate
calculations, resulting in no portfolio turnover rate for reporting purposes.

Selection of a broker for a particular portfolio transaction depends on many
factors, some of which are subjective and which include the net price, the
confidentiality, reliability, integrity, the size and nature of the transaction
and the market in which it is to occur and any research or other services that
the broker has provided.  The Adviser determines the overall reasonableness of
brokerage commissions and of premiums and discounts on principal transactions
(which do not involve commissions), by review of comparable trades for the
Adviser's other clients and in the market generally.  If more than one broker
is believed to be equally qualified to effect a portfolio transaction, the
Adviser may assign the transaction to a broker that has furnished research
services, but the Adviser has no agreement, formula or policy as to allocation
of brokerage.  The Fund does not ordinarily market its shares through brokers
and any sales of the Fund's shares by a broker would be neither a qualifying
nor disqualifying factor in allocating brokerage.  All the Fund's 1996
portfolio transactions were with brokers that met the above requirements, some
of which provided research or other services to the Adviser.

The Fund may pay to brokers that provide research services to the Adviser a
commission higher than another broker might have charged if it is determined
that the commission is reasonable in relation to the value of the brokerage and
research services that are provided, viewed in terms of either the particular
transaction or the Adviser's overall responsibility to its advisory accounts.
The extent to which such commissions exceed commissions solely for execution
cannot be determined, but such research services, which are involved in
portfolio transactions for the Fund and for the Adviser's other advisory
accounts, can be of benefit to both the Fund and such other accounts.  The
value of research services that are provided by brokers who handle portfolio
transactions for the Fund cannot be precisely determined and such services are
supplemental to the Adviser's own efforts, which are undiminished thereby.  The
Adviser does not believe that its expenses are reduced by reason of such
services, which benefit the Fund and the Adviser's other clients.  Transactions
in over-the-counter securities are generally executed as principal trades with
primary market makers, except where it is believed that a better combination of
price and execution could otherwise be obtained.
The Growth Fund paid total brokerage fees of $94,561, $254,434 and $198,271 in
1996, 1995 and 1994, respectively.  None of these brokerage fees were paid to a
broker that was an affiliated person of the Fund or to a broker of which an 
affiliated person was an affiliated person of the Fund or of the Adviser.
The Value Discovery Fund paid total brokerage fees of $12 for the
period from December 23, 1996 (Commencement of Operations) to December 31,
1996.  None of these brokerage fees were paid to a broker that was an
affiliated person of the Fund or to a broker of which an affiliated person was
an affiliated person of the Fund or of the Adviser.





                                7
<PAGE>   57
International Growth Fund paid brokerage fees of $779,507, $454,667 and
$301,194 in 1996, 1995 and 1994, respectively.  None of these brokerage fees 
were paid to a broker that was affiliated person of the Fund or to a broker of
which an affiliated person was an affiliated person of the Fund or of the 
Adviser.

Purchases and sales of portfolio securities for the Income Fund and Ready
Reserves Fund usually are principal transactions, either directly with the
issuer or with an underwriter or market maker, with no brokerage commissions
paid by the portfolio.  No brokerage commissions were paid by the Income Fund
or the Ready Reserves Fund during the fiscal years ended December 31, 1996,
1995 and 1994.  Purchases from underwriters will include a commission or
concession paid by the issuer to the underwriter and purchases from dealers
serving as market makers will include the spread between the bid and asked
prices.  The primary consideration in the allocation of transactions is prompt
execution of orders in an effective manner at the most favorable price.

The investment decisions for the Fund are reached independently from those for
other accounts managed by the Adviser.  Such other accounts also may make
investments in the same type of instruments or securities as the Fund at the
same time as the Fund.  When two or more accounts have funds available for
investment in similar instruments, available instruments are allocated as to
amount in a manner considered equitable to each account.  In some cases this
procedure may affect the size or price of the position obtainable for the Fund.
However, it is the opinion of the Board of Directors that the benefits
available because of the Adviser's organization outweigh any disadvantages that
may arise from exposure to simultaneous transactions.

No portfolio transactions are executed for the Fund with or through the Adviser
or any affiliated broker-dealer of the Adviser.  The Fund may purchase
securities from other members of an underwriting syndicate of which the Adviser
or an affiliated broker-dealer is a participant, but only under conditions set
forth in applicable rules of the Securities and Exchange Commission and in
accordance with procedures adopted and reviewed periodically by the Board of
Directors.


                      INVESTMENT POLICIES AND RESTRICTIONS

The Fund has adopted certain fundamental investment restrictions for each
portfolio that, along with the portfolio's investment objective, cannot be
changed without approval by holders of a "majority of the outstanding voting
securities" of the portfolio, which is defined in the Investment Company Act of
1940 (the "Act") to mean the lesser of (a) 67% of the shares of the portfolio
at a meeting where more than 50% of the outstanding voting shares of the
portfolio are present in person or by proxy; or (b) more than 50% of the
outstanding voting shares of the portfolio.  All percentage restrictions on
investments apply at the time the investment is made and shall not be
considered to violate the limitations unless, immediately after or as a result
of the investment, a violation of the restriction occurs.  There can be no
assurance that a portfolio will meet its investment objective.


THE GROWTH FUND.

(1)   The portfolio will operate as an open-end, diversified, management type
investment company, as defined in the Investment Company Act of 1940.

The Growth Fund may not:

(2)   Invest in any enterprise for the purpose of exercising control or
management thereof.

(3)   Buy or sell real estate or real estate loans.

(4)   Underwrite the securities of other issuers.





                                8
<PAGE>   58
(5)   Make loans to other persons.

(6)   Purchase or sell commodities or commodity contracts.

(7)   Issue senior securities.

(8)   Borrow money, except from banks for current obligations of a minor
character incurred in the ordinary course of business, nor borrow amounts in
excess of 10% of its gross assets.  (The portfolio does not presently intend to
borrow any amount in excess of 5% of its gross assets.)

(9)   Make an investment if doing so would cause more than 25% of its total
assets to be invested in any one industry.

The following are the portfolio's non-fundamental operating policies, which may
be changed by the Fund's Board of Directors without shareholder approval.

The Growth Fund may not:

(10)  Pledge, or create a lien on, its assets.

(11)  Purchase any security if doing so would cause more than 10% of the voting
securities of the issuer to be held by the portfolio.

(12)  Purchase, except for securities acquired as part of a merger,
consolidation or acquisition of assets, more than 3% of the stock of another
investment company.

(13)  Invest in futures contracts, puts, calls, straddles, spreads or any
combination thereof.

(14)  Invest in illiquid securities if, as a result of such investment, more
than 15% of its net assets would be invested in illiquid securities.

(15)  Sell securities short, unless the portfolio owns or has the right to
obtain securities equivalent in kind and amount to the securities sold short,
or unless it covers such short sale as required by the current rules and
positions of the Securities and Exchange Commission or its staff and provided
that transactions in futures contracts or other derivative instruments are not
deemed to constitute selling securities short.

(16)  Purchase securities on margin, except that the Fund may obtain such
short-term credits as are necessary for the clearance of transactions; and
provided that margin deposits in connection with futures contracts or other
derivative instruments shall not constitute purchasing securities on margin.

VALUE DISCOVERY FUND.

The Value Discovery Fund:

(1) May not with respect to 75% of its total assets, purchase the securities of
any issuer (except securities issued or guaranteed by the U.S. government or
its agencies or instrumentalities) if, as a result, (i) more than 5% of the
portfolio's total assets would be invested in the securities of that issuer or
(ii) the portfolio would hold more than 10% of the outstanding voting
securities of that issuer.





                                9
<PAGE>   59
(2) May (i) borrow money from banks and (ii) make other investments or engage in
other transactions permissible under the Investment Company Act of 1940 (the
"1940 Act") which may involve a borrowing, provided that the combination of (i)
and (ii) shall not exceed 33 1/3% of the value of the portfolio's total assets
(including the amount borrowed), less the portfolio's liabilities (other than
borrowings), or such other percentage permitted by law, except that the
portfolio may borrow up to an additional 5% of its total assets (not including
the amount borrowed) from a bank for temporary or emergency purposes (but not
for leverage or the purchase of investments).

Note:  Presently, the Value Discovery Fund only intends to borrow from banks
for temporary or emergency purposes.  However, the portfolio may borrow money
from banks and make other investments or engage in other transactions
permissible under the 1940 Act which may be considered a borrowing (such as
mortgage dollar rolls and reverse repurchase agreements).

(3) May not issue senior securities, except as permitted under the 1940 Act.

(4) May not act as an underwriter of another issuer's securities, except to the
extent that the portfolio may be deemed to be an underwriter within the meaning
of the Securities Act of 1933 in connection with the purchase and sale of
portfolio securities.

(5) May not purchase or sell physical commodities unless acquired as a result of
ownership of securities or other instruments (but this shall not prevent the
portfolio from purchasing or selling options, futures contracts, or other
derivative instruments or from investing in securities or other instruments
backed by physical commodities).

(6) May not make loans if, as a result, more than 33 1/3% of the portfolio's
total assets would be lent to other persons, except through (i) purchases of
debt securities or other debt instruments or (ii) engaging in repurchase
agreements.

(7) May not purchase the securities of any issuer if, as a result, 25% or more
of the portfolio's total assets would be invested in the securities of issuers,
the principal business activities of which are in the same industry.

(8) May not purchase or sell real estate unless acquired as a result of
ownership of securities or other instruments (but this shall not prohibit the
portfolio from purchasing or selling securities or other instruments backed by
real estate or of issuers engaged in real estate activities).

The following are the portfolio's non-fundamental operating policies, which may
be changed by the Fund's Board of Directors without shareholder approval.

The Value Discovery Fund may not:

(9) Sell securities short, unless the portfolio owns or has the right to obtain
securities equivalent in kind and amount to the securities sold short, or
unless it covers such short sale as required by the current rules and positions
of the Securities and Exchange Commission or its staff and provided that
transactions in futures contracts or other derivative instruments are not
deemed to constitute selling securities short.

(10) Purchase securities on margin, except that the Fund may obtain such
short-term credits as are necessary for the clearance of transactions; and
provided that margin deposits in connection with futures contracts or other
derivative instruments shall not constitute purchasing securities on margin.

(11) Invest in illiquid securities if, as a result of such investment, more than
15% of its net assets would be invested in illiquid securities.





                                10
<PAGE>   60
(12) Purchase except for securities acquired as part of a merger, consolidation
or acquisition of assets, more than 3% of the stock of another investment
company.

(13) Engage in futures transactions which are impermissible pursuant to Rule 4.5
under the Commodity Exchange Act and, in accordance with Rule 4.5, will use
futures transactions solely for bona fide hedging transactions (within the
meaning of the Commodity Exchange Act); provided, however, that the portfolio
may, in addition to bona fide hedging transactions, use futures transactions if
the aggregate initial margin and premiums required to establish such positions
do not exceed 5% of the portfolio's net assets. In addition, the aggregate
margin deposits required on all futures transactions being held will not exceed
5% of the portfolio's total assets.

(14) Pledge, mortgage or hypothecate any assets owned by the portfolio except as
may be necessary in connection with permissible borrowings or investments and
then such pledging, mortgaging or hypothecating may not exceed 33 1/3% of the
portfolio's total assets at the time of the borrowing or investment.


INTERNATIONAL GROWTH FUND.

The International Growth Fund may not:

(1)    Borrow money except as a temporary measure for extraordinary or emergency
purposes and then only in an amount up to 10% of the value of its total assets
(any such borrowing under this section will not be collateralized).  The
portfolio will not borrow for leverage purposes.

(2)    Pledge, mortgage or create a lien on its assets.

(3)    Make loans of money or portfolio securities, except through the purchase
of debt obligations and repurchase agreements.

(4)    Purchase any securities if, immediately after such purchase, more than
25% of the value of the portfolio's total assets would be invested in the
securities of issuers in the same industry.  There is no limitation as to the
portfolio's investments in obligations issued or guaranteed by the U.S.
government, its agencies or instrumentalities.  For purposes of this
restriction, the obligations of each foreign government are deemed to
constitute an industry.

(5)    Invest more than 5% of the value of its total assets in the securities of
any one issuer or purchase more than 10% of the outstanding voting securities,
or any class of securities, of any one issuer.  For purposes of this
restriction, all outstanding debt securities of an issuer are considered as one
class and all preferred stock of an issuer is considered as one class.  (This
restriction does not apply to obligations issued or guaranteed by the U.S.
government, or its agencies or instrumentalities.)

(6)    Underwrite securities by others, except to the extent the portfolio may
be deemed to be an underwriter, under the Federal securities laws, in
connection with the disposition of portfolio securities.

(7)    Purchase securities of other U.S. or foreign investment companies, except
that the portfolio may make such a purchase (a) in the open market provided
that immediately thereafter (i) not more than 10% of the portfolio's total
assets would be invested in such securities; (ii) not more than 5% of the
portfolio's total assets would be invested in securities of any one investment
company; and (iii) not more than 3% of the total outstanding voting stock of
any one investment company would be owned by the portfolio, or (b) as part of
an offer of exchange, reorganization or as a dividend.





                                11
<PAGE>   61
(8)    Make short sales of securities, or purchase any securities on margin, or
maintain a short position or participate on a joint or a joint and several
basis in any trading account in securities, except that the portfolio may (i)
obtain such short-term credits as may be necessary for the clearance of
purchases and sales of securities; (ii) purchase or sell futures contracts and
(iii) deposit or pay initial or variation margin in connection with financial
futures contracts or related options transactions.

(9)    Purchase or sell put options, call options, or combinations thereof,
except that the portfolio may engage in financial futures contracts and related
options transactions to seek to hedge against either a decline in the value of
securities included in the portfolio or an increase in the price of securities
which the portfolio plans to purchase in the future.

(10)   Purchase or sell commodities or commodity contracts, except that the
portfolio may enter into financial futures contracts, options on futures
contracts and forward foreign currency exchange contracts.

(11)   Purchase or sell real estate (although it may purchase securities of
issuers that engage in real estate operations, securities that are secured by
interests in real estate or securities that represent interests in real
estate, including real estate investment trusts).

(12)   Invest in interests in oil, gas or other mineral leases, rights or
royalty contracts or exploration or development programs, although it may
invest in the securities of issuers which invest in or sponsor such programs.

(13)   Invest for the purposes of exercising control or management of another
issuer.

(14)   Issue any "senior securities" as defined in the Act (except for engaging
in futures and options transactions and except for borrowing subject to the
restrictions set forth above).

(15)   Invest more than 5% of its total assets in securities of issuers which
with their predecessors have a record of less than three years continuous
operation.


INCOME FUND.

The Income Fund may not:

(1)   Purchase securities of any issuer (other than obligations of, or
guaranteed by, the United States Government, its agencies or instrumentalities)
if, as a result, more than 5% of the value of its total assets would be
invested in securities of that issuer.

(2)   Purchase more than 10% of any class of securities of any issuer, except
that such restriction shall not apply to securities issued or guaranteed by the
United States Government, its agencies or instrumentalities.  All debt
securities and all preferred stocks are each considered as one class.

(3)   Invest more than 5% of its total assets in securities of issuers which
with their predecessors have a record of less than three years continuous
operation.

(4)   Make short sales of securities or purchase any securities on margin
except to obtain such short-term credits as may be necessary for the clearance
of transactions.

(5)   Write, purchase or sell puts, calls or combinations thereof.





                                12
<PAGE>   62
(6)   Invest for the purpose of exercising control or management of another
      issuer.

(7)   Invest in commodities or commodity futures contracts or in real estate;
although it may invest in securities which are secured by real estate and
securities of issuers which invest or deal in real estate.

(8)   Invest in interests in oil, gas or other mineral exploration or
development programs, although it may invest in the securities of issuers which
invest in or sponsor such programs.

(9)   Underwrite securities issued by others except to the extent the portfolio
may be deemed to be an underwriter, under the Federal securities laws, in
connection with the disposition of portfolio securities.

(10)  Issue senior securities as defined in the Investment Company Act of 1940.

(11)  Purchase common stocks, preferred stocks, warrants or other equity
securities.

(12)  Make loans to others, except through the purchase of debt obligations or
repurchase agreements or the loaning of portfolio securities not exceeding 75%
of the value of its total assets.

(13)  Borrow money, except as a temporary measure and then only in an amount up
to 5% of the value of its total assets (any such borrowing under this section
will not be collateralized).  The portfolio will not borrow for leverage
purposes.

(14)  Concentrate more than 25% of the value of its total assets in any one
industry.  This restriction does not apply to U.S. Government securities or
government agency securities, or to instruments, such as repurchase agreements,
secured by these instruments.

The following are the portfolio's non-fundamental operating policies, which may
be changed by the Fund's Board of Directors without shareholder approval.

The Income Fund may not:

(1)   Invest in illiquid securities if, as a result of such investment, more
than 15% of its net assets would be invested in illiquid securities.

READY RESERVES FUND.

The Ready Reserves Fund may not:

(1)   Purchase securities of any issuer (other than obligations of, or
guaranteed by, the United States Government, its agencies or instrumentalities)
if, as a result, more than 5% of the value of its total assets would be
invested in securities of that issuer.

(2)   Purchase more than 10% of any class of securities of any issuer, except
that such restriction shall not apply to securities issued or guaranteed by the
United States Government, its agencies or instrumentalities.  All debt
securities and all preferred stocks are each considered as one class.

(3)   Invest more than 5% of its total assets in securities of issuers which
with their predecessors have a record of less than three years continuous
operation.

(4)   Make short sales of securities, or purchase any securities on margin
except to obtain such short-term credits as may be necessary for the clearance
of transactions.





                                13
<PAGE>   63
(5)   Write, purchase or sell puts, calls or combinations thereof.

(6)   Invest for the purpose of exercising control or management of another
issuer.

(7)   Invest in commodities or commodity futures contracts or in real estate,
although it may invest in securities which are secured by real estate and
securities of issuers which invest or deal in real estate.

(8)   Invest in interests in oil, gas or other mineral exploration or
development programs, although it may invest in the securities of issuers which
invest in or sponsor such programs.

(9)   Underwrite securities issued by others except to the extent the portfolio
may be deemed to be an underwriter, under the Federal securities laws, in
connection with the disposition of portfolio securities.

(10)  Issue senior securities as defined in the Investment Company Act of 1940.

(11)  Make loans to others (except through the purchase of debt obligations or
repurchase agreements in accordance with its investment objective and
policies).

(12)  Borrow money except as a temporary measure for extraordinary or emergency
purposes and then only in an amount up to 5% of the value of its total assets
(any such borrowing under this section will not be collateralized).  The
portfolio will not borrow for leverage purposes.

(13)  Concentrate more than 25% of the value of its total assets in any one
industry; provided, however, that the portfolio reserves freedom of action to
invest up to 100% of its total assets in certificates of deposit, time deposits
or bankers' acceptances or repurchase agreements with domestic branches of
domestic banks when management considers it to be in the interests of the
portfolio in attaining its investment objective.

(14)  Invest in securities restricted as to disposition under the Federal
securities laws (except commercial paper issued under Section 4(2) of the
Securities Act of 1933).

(15)  Purchase securities of other investment companies, except in connection
with a merger, consolidation, reorganization or acquisition of assets.


                              INVESTMENT PRACTICES

The Prospectus describes each portfolio's investment objective as well as
certain investment policies and investment techniques that the portfolio may
employ in pursuing its investment objective.  The following discussion
supplements the discussion contained in the Prospectus, including the
Investment Glossary at the end of the Prospectus.  Not all of the portfolios
may invest in all of the types of investments listed below.


COLLATERALIZED OBLIGATIONS.  Mortgage-Backed Securities.  Collateralized
obligations include mortgage-backed collateralized obligations
("mortgage-backed securities").  Mortgage-backed securities are securities that
directly or indirectly represent a participation in, or are secured by and
payable from, mortgage loans secured by real property.  There currently are
three basic types of mortgage-backed securities:  (1) those issued or
guaranteed by the U.S. Government or one of its agencies or instrumentalities,
such as GNMA (Government National Mortgage Association), FNMA (Federal National
Mortgage Association) and FHLMC (Federal Home Loan Mortgage Corporation); (2)
those issued by private issuers that represent an interest in or are
collateralized by mortgage-backed securities issued or guaranteed by the U.S.
Government or one of its agencies or instrumentalities and (3) those issued by
private issuers that represent an interest in or are collateralized by





                                14
<PAGE>   64
whole mortgage loans or mortgage-backed securities without a government
guarantee but that usually have some form of private credit enhancement.

The yield characteristics of mortgage-backed securities differ from traditional
debt securities.  Among the major differences are that interest and principal
payments are made more frequently, usually monthly, and that principal may be
prepaid at any time because the underlying mortgage loans generally may be
prepaid at any time.  As a result, if a portfolio purchases such a security at
a premium, a prepayment rate that is faster than expected will reduce yield to
maturity, while a prepayment rate that is slower than expected will increase
yield to maturity.  Conversely, if a portfolio purchases these securities at a
discount, faster than expected prepayments will increase yield to maturity, 
while slower than expected prepayments will reduce it.

Prepayments on a pool of mortgage loans are influenced by a variety of
economic, geographic, social and other factors, including changes in
mortgagors' housing needs, job transfers, unemployment, mortgagors' net equity
in the mortgaged properties and servicing decisions.  Generally, however,
prepayments on fixed rate mortgage loans will increase during a period of
falling interest rates and decrease during a period of rising interest rates.
Accordingly, amounts available for reinvestment by the portfolio are likely to
be greater during a period of declining interest rates and, as a result, are
likely to be reinvested at lower interest rates than during a period of rising
interest rates.  Mortgage-backed securities may decrease in value as a result
of increases in interest rates and may benefit less than other fixed income
securities from declining interest rates because of the risk of prepayment.

Guaranteed Mortgage Pass-Through Securities.  Mortgage pass-through securities
represent participation interests in pools of residential mortgage loans
originated by United States Governmental or private lenders and guaranteed, to
the extent provided in such securities, by the United States Government or one
of its agencies or instrumentalities.  Such securities, which are ownership
interests in the underlying mortgage loans, differ from conventional debt
securities, which provide for periodic payment of interest in fixed amounts
(usually semi-annually) and principal payments at maturity or on specified call
dates.  Mortgage pass-through securities provide for monthly payments that are
a "pass-through" of the monthly interest and principal payments (including any
prepayments) made by the individual borrowers on the pooled mortgage loans, net
of any fees paid to the guarantor of such securities and the services of the
underlying mortgage loans.  The guaranteed mortgage pass-through securities in
which the portfolio will invest will include those issued or guaranteed by
GNMA, FNMA and FHLMC.

GNMA is a wholly-owned corporate instrumentality of the United States within
the Department of Housing and Urban Development.  The National Housing Act of
1934, as amended (the "Housing Act"), authorizes GNMA to guarantee the timely
payment of the principal of and interest on certificates ("Ginnie Mae
Certificates") that are based upon and backed by a pool of mortgage loans
insured by the Federal Housing Administration under the Housing Act, or Title V
of the Housing Act of 1949 (FHA Loans), or guaranteed by the Veterans'
Administration under the Servicemen's Readjustment Act of 1944, as amended (VA
Loans), or by pools of other eligible mortgage loans.  Ginnie Mae Certificates
represent a pro rata interest in one or more pools of eligible mortgage loans.
The Housing Act provides that the full faith and credit of the United States
Government is pledged to the payment of all amounts that may be required to be
paid under any guarantee.  In order to meet its obligations under such
guarantee, GNMA is authorized to borrow from the United States Treasury with no
limitations as to amount.

FNMA is a federally chartered and privately owned corporation organized and
existing under the Federal National Mortgage Association Charter Act.  FNMA was
originally established in 1938 as a United States Government agency to provide
supplemental liquidity to the mortgage market and was transformed into a
stockholder owned and privately managed corporation by legislation enacted in
1968.  FNMA provides funds to the mortgage market primarily by purchasing home
mortgage loans from local lenders, thereby replenishing their funds for
additional lending.  FNMA acquires funds to purchase home mortgage loans from
many capital market





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<PAGE>   65
investors that may not ordinarily invest in mortgage loans directly, thereby
expanding the total amount of funds available for housing.

Each Fannie Mae Certificate will entitle the registered holder thereof to
receive amounts representing the holder's pro rata interest in scheduled
principal payments and interest payments (at such Fannie Mae Certificate's
pass-through rate, which is net of any servicing and guarantee fees on the
underlying mortgage loans) and any principal  prepayments, on the mortgage
loans in the pool represented by such Fannie Mae Certificate and such holder's
proportionate interest in the full principal amount of any foreclosed or
otherwise finally liquidated mortgage loan.  The full and timely payment of
principal of and interest on each Fannie Mae Certificate will be guaranteed by
FNMA, which guarantee is not backed by the full faith and credit of the United
States Government.  FNMA has limited rights to borrow from the United States
Treasury.

FHLMC is a corporate instrumentality of the United States created pursuant to
the Emergency Home Finance Act of 1970, as amended.  FHLMC was established
primarily for the purpose of increasing the availability of mortgage credit for
the financing of needed housing.  The principal activity of FHLMC currently
consists of the purchase of first lien, conventional, residential mortgage
loans and participation interests in such mortgage loans and the resale of the
mortgage loans so purchased in the form of mortgage securities, primarily
Freddie Mac Certificates.

FHLMC guarantees to each registered holder of a Freddie Mac Certificate the
timely payment of interest at the rate provided for by such Freddie Mac
Certificate, whether or not received.  FHLMC also guarantees to each holder of
a Freddie Mac Certificate ultimate collection of all principal of the related
mortgage loans, without any offset or deduction, but does not always guarantee
the timely payment of scheduled principal.  FHLMC may remit the amount due on
account of its guarantee of collection of principal at any time after default
on an underlying mortgage loan, but not later than 30 days following (i)
foreclosure sale, (ii) payment of a claim by any mortgage insurer or (iii) the
expiration of any right of redemption, whichever occurs later, but in any event
no later than one year after demand has been made upon the mortgagor for
accelerated payment of principal.  The obligations of FHLMC under its guarantee
are obligations solely of FHLMC and are not backed by the full faith and credit
of the United States Government.  FHLMC has limited rights to borrow from the
United States Treasury.

Private Mortgage Pass-Through Securities.  Private mortgage pass-through
securities ("private pass-throughs") are structured similarly to the Ginnie
Mae, Fannie Mae and Freddie Mac mortgage pass-through securities described
above and are issued by originators of and investors in mortgage loans,
including savings and loan associations, mortgage banks, commercial banks,
investment banks and special purpose subsidiaries of the foregoing.  Private
pass-throughs are usually backed by a pool of conventional fixed rate or
adjustable rate mortgage loans.  Since private pass-throughs typically are not
guaranteed by an entity having the credit status of GNMA, FNMA or FHLMC, such
securities generally are structured with one or more types of credit
enhancement.  See "Types of Credit Support," below.

Collateralized Mortgage Obligations and Multiclass Pass-Through Securities.
Collateralized mortgage obligations, or, "CMOs," are debt obligations
collateralized by mortgage loans or mortgage pass-through securities.
Typically, CMOs are collateralized by Ginnie Mae, Fannie Mae or Freddie Mac
Certificates, but also may be collateralized by whole loans or private
pass-throughs (such collateral collectively hereinafter referred to as
"Mortgage Assets").  Multiclass pass-through securities are equity interests in
a trust composed of Mortgage Assets.  Payments of principal of and interest on
the Mortgage Assets and any reinvestment income thereon, provide the funds to
pay debt service on the CMOs or make scheduled distributions on the multiclass
pass-through securities.  CMOs may be issued by agencies or instrumentalities
of the United States 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 subsidiaries of the
foregoing.





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In a CMO, a series of bonds or certificates is issued in multiple classes.
Each class of CMOs, often referred to as a "tranche," is issued at a specific
fixed or floating coupon rate and has a stated maturity or final distribution
date.  Principal prepayments on the Mortgage Assets may cause the CMOs to be
retired substantially earlier than their stated maturities or final
distribution dates.  Interest is paid or accrues on all classes of the CMOs on
a monthly, quarterly or semi-annual basis.  The principal of and interest on
the Mortgage Assets may be allocated among the several classes of a series of a
CMO in innumerable ways.  In a common structure, payments of principal,
including any principal prepayments, on the Mortgage Assets are applied to the
classes of the series of a CMO in the order of their respective stated
maturities or final distribution dates, so that no payment of principal will be
made on any class of CMOs until all other classes having an earlier stated
maturity or final distribution date have been paid in full.

Stripped Mortgage-Backed Securities.  Stripped mortgage-backed securities
("SMBS") are derivative multiclass mortgage securities.  SMBS may be issued by
agencies or instrumentalities of the United States 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 subsidiaries 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 the remainder of the principal.  In the most extreme
case, one class will receive all the interest (the interest-only or "IO"
class), while the other class will receive all the principal (the
principal-only or "PO" class).  The yield to maturity on an IO class is
extremely sensitive to the rate of principal payments (including prepayments)
on the related underlying Mortgage Assets and a rapid rate of principal
payments may have a material adverse effect on the portfolio's yield to
maturity.  If the underlying Mortgage Assets experience greater than
anticipated prepayments of principal, the portfolio may fail to fully recoup
its initial investment in these securities.

Although SMBS are purchased and sold by institutional investors through several
investment banking firms acting as brokers or dealers, these securities were
only recently developed and, accordingly, may have less liquidity than other
securities.  The portfolio will invest only in IO and PO class mortgage
obligations collateralized by securities guaranteed by the United States
Government.

Types of Credit Support.  Mortgage-backed and asset-backed securities are often
backed by a pool of assets representing the obligations of a number of
different parties.  To lessen the effect of failures by obligors on underlying
assets to make payments, such securities may contain elements of credit
support.  Such credit support falls into two categories: (i) liquidity
protection and (ii) protection against losses resulting from ultimate default
by an obligor on the underlying assets.  Liquidity protection refers to the
provision of advances, generally by the entity administering the pool of
assets, to ensure that the receipt of payments on the underlying pool occurs in
a timely fashion.  Protection against losses resulting from ultimate default
ensures ultimate payment of the obligations on at least a portion of the assets
in the pool.  Such protection may be provided through guarantees, insurance
policies or letters of credit obtained by the issuer or sponsor from third
parties, through various means of structuring the transaction or through a
combination of such approaches.

Examples of credit support arising out of the structure of the transaction
include "senior-subordinated securities" (multiple class securities with one or
more classes subordinate to other classes as to the payment of principal
thereof and interest thereon, with the result that defaults on the underlying
assets are borne first by the holders of the subordinated class), creation of
"reserve funds" (where cash or investments, sometimes funded from a portion of
the payments on the underlying assets, are held in reserve against future
losses) and "overcollateralization" (where the scheduled payments on, or the
principal amount of, the underlying assets exceeds that required to make
payment of the securities and pay any servicing or other fees).  The degree of
credit support provided for each issue is generally based upon historical
information respecting the level of credit





                                17
<PAGE>   67
risk associated with the underlying assets.  Delinquency or loss in excess of
that anticipated could adversely affect the return on an investment in such a
security.

Asset-Backed Securities.  The securitization techniques used to develop
mortgage-backed securities are now being applied to a broad range of assets.
Through the use of trusts and special purpose corporations, various types of
assets, primarily automobile and credit card receivables, are being securitized
in pass-through structures similar to the mortgage pass-through structures
described above or in a pay-through structure similar to the CMO structure.
The Income Fund may invest in these and other types of asset-backed securities
that may be developed in the future.

As with mortgage-backed securities, the yield characteristics of asset-backed
securities differ from traditional debt securities.  As with mortgage-backed
securities, asset-backed securities are often backed by a pool of assets
representing the obligations of a number of different parties and use similar
credit enhancement techniques.  See "Mortgage-Backed Securities," above.  In
general, however, the collateral supporting asset-backed securities is of
shorter maturity than mortgage loans and is less likely to  experience
substantial prepayments.  Although certain of the factors that affect the rate
of prepayments on mortgage-backed securities also affect the rate of
prepayments on asset-backed securities, during any particular period, the
predominant factors affecting prepayment rates on mortgage-backed securities
and asset-backed securities may be different.

Asset-backed securities present certain risks that are not presented by
mortgage-backed securities.  Primarily, these securities do not have the
benefit of the same security interest in the related collateral.  Credit card
receivables are generally unsecured and the debtors are entitled to the
protection of a number of state and federal consumer credit laws, many of which
give such debtors the right to set off certain amounts owed on the credit
cards, thereby reducing the balance due.  Most issuers of automobile
receivables permit the servicers to retain possession of the underlying
obligations.  If the servicers were to sell these obligations to another party,
there is a risk that the purchaser would acquire an interest superior to that
of the holders of the related automobile receivables.  In addition, because of
the large number of vehicles involved in a typical issuance and technical
requirements under state laws, the trustee for the holders of the automobile
receivables may not have a proper security interest in all the obligations
backing such receivables.  Therefore, there is the possibility that recoveries
on repossessed collateral may not, in some cases, be available to support
payments on these securities.
Inverse Floaters.  The Income Fund may invest in mortgage derivative
products like inverse floating rate debt instruments ("inverse floaters").  The
interest rate on an inverse floater resets in the opposite direction from the
market rate of interest to which the inverse floater is indexed.  The income
from an inverse floater may be magnified to the extent that its rate varies by
a magnitude that exceeds the magnitude of the change in the index rate of
interest.  The higher the degree of magnification in an inverse floater, the
greater the volatility in its market value.  Accordingly, the duration of an
inverse floater may exceed its stated final maturity.  The coupon of an inverse
floating rate note moves inversely to the movement of interest rates.  In
addition, mortgage-backed inverse floaters will experience approximately the
same changes in average lives and durations that other comparable fixed rate
mortgage-backed bonds do when prepayments rise and fall with declines and
increases in interest rates.  In a rising interest rate environment, the
declining coupon coupled with the increase in the average life can magnify the
price decline relative to a fixed rate obligation.  Conversely, rate declines
increase coupon income and gradually shorten the average life, which tends to
amplify the price increase.  Inverse floaters are typically priced based on a
matrix.

FOREIGN SECURITIES.  Investing in foreign securities involves a series of risks
not present in investing in U.S. securities. Most of the foreign securities
held by the portfolios will not be registered with the Securities and Exchange
Commission (the "SEC"), nor will the foreign issuers be subject to SEC
reporting requirements. Accordingly, there may be less publicly available
information concerning foreign issuers of securities held by the portfolio than
is available concerning U.S. companies. Disclosure and regulatory standards in
many respects are





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<PAGE>   68
less stringent in emerging market countries than in the U.S. and other major
markets. There also may be a lower level of monitoring and regulation of
emerging markets and the activities of investors in such markets and
enforcement of existing regulations may be extremely limited. Foreign companies
and in particular, companies in smaller and emerging capital markets are not
generally subject to uniform accounting, auditing and financial reporting
standards, or to other regulatory requirements comparable to those applicable
to U.S. companies. The portfolio's net investment income and capital gains from
its foreign investment activities may be subject to non-U.S. withholding taxes.

The costs attributable to foreign investing that the portfolio must bear
frequently are higher than those attributable to domestic investing; this is
particularly true with respect to emerging capital markets. For example, the
costs of maintaining custody of foreign securities exceeds custodian costs for
domestic securities and transaction and settlement costs of foreign investing
also frequently are higher than those attributable to domestic investing. Costs
associated with the exchange of currencies also make foreign investing more
expensive than domestic investing. Investment income on certain foreign
securities in which the portfolio may invest may be subject to foreign
withholding or other government taxes that could reduce the return of these
securities. Tax treaties between the United States and foreign countries,
however, may reduce or eliminate the amount of foreign tax to which the
portfolio would be subject.

Foreign markets also have different clearance and settlement procedures and in
certain markets there have been times when settlements have failed to keep pace
with the volume of securities transactions, making it difficult to conduct such
transactions. Delays in settlement could result in temporary periods when
assets of the portfolio are uninvested and no return is earned thereon. The
inability of the portfolio to make intended security purchases due to
settlement problems could cause the portfolio to miss investment opportunities.
Inability to dispose of a portfolio security due to settlement problems could
result either in losses to the portfolio due to subsequent declines in the
value of such portfolio security or, if the portfolio has entered into a
contract to sell the security, could result in possible liability to the
purchaser.
Foreign securities may be purchased through depository receipts, including
American Depository Receipts ("ADRs"), European Depository Receipts
("EDRs"), Global Depository Receivables (GDRs), or other securities convertible
into securities of foreign issuers.  These securities may not necessarily be 
denominated in the same currency as the securities into which they may be 
converted.  Generally, ADRs, in registered form, are denominated in U.S. 
dollars and are designed for use in the U.S. securities markets, while EDRs and 
GDRs may be denominated in other currencies and are designed for use
in the European securities markets. ADRs are receipts typically issued by a 
U.S. bank or trust company evidencing ownership of the underlying securities. 
EDRs and GDRs are European receipts evidencing a similar arrangement.  For 
purposes of the portfolio's investment policies, ADRs, EDRs and GDRs are deemed
to have the same classification as the underlying securities they represent, 
except that ADRs, EDRs and GDRs shall be treated as indirect foreign 
investments. Thus, an ADR, EDR or GDR representing ownership of common stock 
will be treated as common stock. ADR, EDR and GDR depository receipts do not 
eliminate all of the risks associated with directly investing in the securities
of foreign issuers.
ADR facilities may be established as either "unsponsored" or "sponsored."
While ADRs issued under these two types of facilities are in some respects
similar, there are distinctions between them relating to the rights and
obligations of ADR holders and the practices of market participants.

A depository may establish an unsponsored facility without participation by (or
even necessarily the acquiescence of) the issuer of the deposited securities,
although typically the depository requests a letter of non-objection from such
issuer prior to the establishment of the facility. Holders of unsponsored ADRs
generally bear all the costs of such facilities. The depository usually charges
fees upon the deposit and withdrawal of the deposited securities, the
conversion of dividends into U.S. dollars, the disposition of non-cash
distributions and the performance of other services. The depository of an
unsponsored facility frequently is under no obligation to pass through voting
rights to ADR holders with respect to the deposited securities. In addition, an
unsponsored facility is generally not





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<PAGE>   69
obligated to distribute communications received from the issuer of the
deposited securities or to disclose material information about such issuer in
the U.S. and thus there may not be a correlation between such information and
the market value of the depository receipts.

Sponsored ADR facilities are created in generally the same manner as
unsponsored facilities, except that the issuer of the deposited securities
enters into a deposit agreements with the depository. The deposit agreement
sets out the rights and responsibilities of the issuer, the depository and the
ADR holders. With sponsored facilities, the issuer of the deposited securities
generally will bear some of the costs relating to the facility (such as
dividend payment fees of the depository), although ADR holders continue to bear
certain other costs (such as deposit and withdrawal fees). Under the terms of
most sponsored arrangements, depositories agree to distribute notices of
shareholder meetings and voting instructions and to provide shareholder
communications and other information to the ADR holders at the request of the
issuer of the deposited securities.


FORWARD FOREIGN CURRENCY TRANSACTIONS.  The foreign securities held by the
International Growth Fund will usually be denominated in foreign currencies and
the portfolio may temporarily hold foreign currency in connection with such
investments.  As a result, the value of the assets held by the portfolio may be
affected favorably or unfavorably by changes in foreign currency exchange rates
and exchange control regulations.  The portfolio may enter into forward foreign
currency contracts ("forward currency contracts") in an effort to control some
of the uncertainties of foreign currency rate fluctuations.  A forward currency
contract is an agreement to purchase or sell a specific currency at a specified
future date and price agreed to by the parties at the time of entering into the
contract.  The portfolio will not engage in foreign currency contracts in which
the specified future date is more than one year from the time of entering into
the contract.  In addition, the portfolio will not engage in forward currency
contracts for speculation, but only as an attempt to hedge against changes in
foreign currency exchange rates affecting the values of securities which the
portfolio holds or intends to purchase.  Thus, the portfolio will not enter
into a forward currency contract if such contract would obligate the portfolio
to deliver an amount of foreign currency in excess of the value of the
portfolio securities or other assets denominated in that currency.

The International Growth Fund may use forward currency contracts to fix the
value of certain securities it has agreed to buy or sell.  For example, when
the portfolio enters into a contract to purchase or sell securities denominated
in a particular foreign currency, the portfolio could effectively fix the
maximum cost of those securities by purchasing or selling a foreign currency
contract, for a fixed value of another currency, in the amount of foreign
currency involved in the underlying transaction.  In this way, the portfolio
can protect the value of securities in the underlying transaction from an
adverse change in the exchange rate between the currency of the underlying
securities in the transaction and the currency denominated in the foreign
currency contract, during the period between the date the security is purchased
or sold and the date on which payment is made or received.

The International Growth Fund may also use forward currency contracts to hedge
the value, in U.S. dollars, of securities it currently owns.  For example, if
the portfolio held securities denominated in a foreign currency and anticipated
a substantial decline (or increase) in the value of that currency against the
U.S. dollar, the portfolio may enter into a foreign currency contract to sell
(or purchase), for a fixed amount of U.S. dollars, the amount of foreign
currency approximating the value of all or a portion of the securities held
which are denominated in such foreign currency.

Upon the maturity of a forward currency transaction, the portfolio may either
accept or make delivery of the currency specified in the contract or, at any
time prior to maturity, enter into a closing transaction which involves the
purchase or sale of an offsetting contract.  An offsetting contract terminates
the portfolio's contractual obligation to deliver the foreign currency pursuant
to the terms of the forward currency contract by obligating the portfolio to
purchase the same amount of the foreign currency, on the same maturity date and
with the same





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currency trader, as specified in the forward currency contract.  The portfolio
realizes a gain or loss as a result of entering into such an offsetting
contract to the extent the exchange rate between the currencies involved moved
between the time of the execution of the original forward currency contract and
the offsetting contract.

The use of forward currency contracts to protect the value of securities
against the decline in the value of a currency does not eliminate fluctuations
in the underlying prices of the securities the portfolio owns or intends to
acquire, but it does fix a future rate of exchange.  Although such contracts
minimize the risk of loss resulting from a decline in the value of the hedged
currency, they also limit the potential for gain resulting from an increase in
the value of the hedged currency.  The benefits of forward currency contracts
to the portfolio will depend on the ability of the portfolio's investment
manager to accurately predict future currency exchange rates.


FOREIGN CURRENCY FUTURES.  Generally, foreign futures contracts will be
executed on a U.S. exchange.  To the extent they are not, however, engaging in
such transactions will involve the execution and clearing of trades on or
subject to the rules of a foreign board of trade.  Neither the National Futures
Association nor any domestic (U.S.) exchange regulates activities of any
foreign boards of trade, including the execution, delivery and clearing of
transactions, or has the power to compel enforcement of the rules of a foreign
board of trade or any applicable foreign law.  This is true even if the
exchange is formally linked to a domestic market so that a position taken on
the exchange may be liquidated by a transaction on the appropriate domestic
market.  Moreover, applicable laws or regulations will vary depending on the
foreign country in which the foreign futures transaction occurs.  Therefore,
entities (such as the portfolio) which trade foreign futures contracts may not
be afforded certain of the protective measures provided by the Commodity
Exchange Act, Commodity Futures Trading Commission ("CFTC") regulations, the
rules of the National Futures Association or those of a domestic (U.S.)
exchange.  In particular, monies received from customers for foreign futures
transactions may not be provided the same protections as monies received in
connection with transactions on U.S. futures exchanges.  In addition, the price
of any foreign futures and, therefore, the potential profits and loss thereon,
may be affected by any variance in the foreign exchange rate between the time
the order for the futures contract is placed and the time it is liquidated,
offset or exercised.


FUTURES.  The Value Discovery Fund may purchase and sell futures contracts on
domestic stock indexes in order to facilitate exposure to the market or in
order to help meet redemption requests. The portfolio may purchase and sell
futures contracts on stock indexes, such as the Russell 2000 Index, as a 
substitute for purchasing or selling the underlying securities. The portfolio 
may not purchase or sell a futures contract unless, immediately after any such
transaction, the sum of the aggregate amount of initial margin deposits on its
existing futures positions is 5% or less of its total assets (after taking into
account certain technical adjustments).

The Value Discovery Fund may be subject to additional risks associated with
futures contracts, such as the possibility that the Adviser's forecasts of
market values and other factors are not correct, imperfect correlation between
the hedging instrument and the asset or liability being hedged, default by the
other party to the transaction and inability to close out a position because of
the lack of a liquid market. In addition to the possibility that there may be
an imperfect correlation, or no correlation at all, between movements in a
futures contract and the securities being hedged, the price of futures
contracts may not correlate perfectly with movement in the cash market due to
certain market distortions. As a result of these factors, a correct forecast of
general market trends or interest rate movements by the Adviser may still not
result in a successful hedging transaction over a short time frame.

The transactions described above are frequently referred to as derivative
transactions. In general, derivatives are instruments whose value is based
upon, or derived from, some underlying index, reference rate (e.g., interest
rates or currency exchange rates), security, commodity or other asset.





                                21
<PAGE>   71
ILLIQUID SECURITIES.  Illiquid securities are securities that are not readily
marketable.  The Board of Directors of the Fund, or its delegate, has the
ultimate authority to determine, to the extent permissible under the federal
securities laws, which securities are illiquid for purposes of this limitation.
Certain securities exempt from registration or issued in transactions exempt
from registration under the Securities Act of 1933, as amended (the "Securities
Act"), such as securities that may be resold to institutional investors under
Rule 144A under the Securities Act and Section 4(2) commercial paper, may be
considered liquid under guidelines adopted by the Fund's Board of Directors.

The Board of Directors has delegated to the Adviser the day-to-day determination
of the liquidity of a security, although it has retained oversight for such
determinations. The Board of Directors has approved procedures that allow the
Adviser to deem Section 4(2) commercial paper liquid only if the Adviser
determines that there is no significant difference between Section 4(2)
commercial paper and traditional commercial paper based upon an evaluation of
the following characteristics: (i) market characteristics, such as the nature of
the security and the nature of marketplace trades; (ii) trading characteristics,
such as the frequency of trades and quotes for the security, the number of
dealers willing to purchase or sell the security and the number of other
potential purchasers; and (iii) the quality of the issue or issuer. With respect
to a portfolio's foreign holdings, a foreign security may be considered liquid
by the Adviser (despite its restricted nature under the Securities Act) if the
security can be freely traded in a foreign securities market and the facts and
circumstances support a finding of liquidity.

LENDING.  The Income Fund may from time to time lend securities (but not in
excess of 75% of its assets) from its portfolio to brokers, dealers and
financial institutions, provided:  (1) the loan is secured continuously by
collateral consisting of U.S. Government securities, government agency
securities, U.S. Government instrumentality securities, cash or cash 
equivalents adjusted daily to have a market value at least equal to the current
market value of the securities loaned plus accrued interest; (2) the portfolio
may at any time call the loan and regain the securities loaned and (3) the 
Adviser (under the supervision of the Board of Directors) has reviewed the 
creditworthiness of the borrower and has found it satisfactory.  The portfolio
will receive from the borrower amounts equal to the interest paid on the 
securities loaned and will also earn income for having made the loan.  Any cash
collateral will be invested in short-term securities, the income from which 
will increase the return to the portfolio.  The risks
associated with lending portfolio securities are similar to those of entering
into repurchase agreements.  While the Value Discovery Fund has the authority
to lend portfolio securities, it has no current intention to do so.

REPURCHASE AGREEMENTS.  In a repurchase agreement, a portfolio buys a security
at one price and at the time of sale, the seller agrees to repurchase the
obligation at a mutually agreed upon time and price (usually within seven
days). The repurchase agreement thereby determines the yield during the
purchaser's holding period, while the seller's obligation to repurchase is
secured by the value of the underlying security.  The Adviser will monitor, on
an ongoing basis, the value of the underlying securities to ensure that the
value always equals or exceeds the repurchase price plus accrued interest.
Repurchase agreements could involve certain risks in the event of a default or
insolvency of the other party to the agreement, including possible delays or
restrictions upon a portfolio's ability to dispose of the underlying
securities.  The risk to a portfolio is limited to the ability of the seller to
pay the agreed upon sum on the delivery date.  In the event of default, a
repurchase agreement provides that the portfolio is entitled to sell the
underlying collateral.  The loss, if any, to the portfolio will be the
difference between the proceeds from the sale and the repurchase price.
However, if bankruptcy proceedings are commenced with respect to the seller of
the security, disposition of the collateral by the portfolio may be





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delayed or limited.  Although no definitive creditworthiness criteria are used,
the Adviser reviews the creditworthiness of the banks and non-bank dealers with
which the portfolio enters into repurchase agreements to evaluate those risks.
The Board of Directors will review and monitor the creditworthiness of
broker-dealers and banks with which a portfolio enters into repurchase
agreements.  A portfolio may, under certain circumstances, deem repurchase
agreements collateralized by U.S. government securities to be investments in
U.S. government securities.



RESTRICTED SECURITIES.  Restricted securities may be sold only in privately
negotiated transactions or in a public offering with respect to which a
registration statement is in effect under the Securities Act. Where
registration is required, a portfolio may be obligated to pay all or part of
the registration expenses and a considerable period may elapse between the time
of the decision to sell and the time the portfolio may be permitted to sell a
security under an effective registration statement. If, during such a period,
adverse market conditions were to develop, the portfolio might obtain a less
favorable price than prevailed when it decided to sell.  If through the
appreciation of restricted securities or the depreciation of unrestricted
securities, a portfolio would be in a position where more of its net assets
are invested in illiquid securities, including restricted securities that are
not readily marketable (except for 144A Securities and 4(2) commercial paper
deemed to be liquid by the Adviser), than is permitted by its investment
restrictions, the Fund will take such steps as it deems advisable, if any, to
protect liquidity.


SMALL COMPANIES.  While smaller companies generally have the potential for
rapid growth, investments in smaller companies often involve greater risks than
investments in larger, more established companies because smaller companies may
lack the management experience, financial resources, product diversification
and competitive strengths of larger companies. In addition, in many instances
the securities of smaller companies are traded only over-the-counter or on a
regional securities exchange and the frequency and volume of their trading is
substantially less than is typical of larger companies. Therefore, the
securities of smaller companies may be subject to greater and more abrupt price
fluctuations. When making large sales, the portfolio may have to sell portfolio
holdings at discounts from quoted prices or may have to make a series of small
sales over an extended period of time due to the trading volume of smaller
company securities. Investors should be aware that, based on the foregoing
factors, an investment in the Value Discovery Fund, and to a lesser extent,
the Growth Fund and the International Growth Fund, may be subject to greater 
price fluctuations than an investment in a fund that invests primarily in 
larger, more established companies. The Adviser's research efforts may also 
play a greater role in selecting securities for the portfolio than in a fund 
that invests in larger, more established companies.


WARRANTS.  Warrants are securities giving the holder the right, but not the
obligation, to buy the stock of an issuer at a given price (generally higher
than the value of the stock at the time of issuance) during a specified period
or perpetually. Warrants may be acquired separately or in connection with the
acquisition of securities. Warrants do not carry with them the right to
dividends or voting rights with respect to the securities that they entitle
their holder to purchase and they do not represent any rights in the assets of
the issuer. As a result, warrants may be considered to have more speculative
characteristics than certain other types of investments. In addition, the value
of a warrant does not necessarily change with the value of the underlying
securities and a warrant ceases to have value if it is not exercised prior to
its expiration date.


WHEN-ISSUED OR DELAYED DELIVERY TRANSACTIONS.  Each portfolio may purchase 
newly issued securities on a when-issued basis and may purchase or sell 
portfolio securities on a delayed delivery basis.  When a portfolio purchases 
securities on a when-issued or a delayed delivery basis, it becomes obligated 
to purchase the securities and it has all the





                                23
<PAGE>   73
rights and risks attendant to ownership of the securities, although delivery
and payment occur at a later date.  A portfolio will record the transaction and
reflect the liability for the purchase and the value of the security in
determining its net asset value.  The value of fixed-income securities to be
delivered in the future will fluctuate as interest rates vary.  A portfolio
generally has the ability to close out a purchase obligation on or before the
settlement date, rather than take delivery of the security.

At the time a portfolio makes the commitment to sell a security on a delayed
delivery basis, it will record the transaction and include the proceeds to be
received in determining its net asset value; accordingly, any fluctuations in
the value of the security sold pursuant to a delayed delivery commitment are
ignored in calculating net asset value so long as the commitment remains in
effect. Normally, settlement occurs within one month of the purchase or sale.

To the extent a portfolio engages in when-issued or delayed delivery purchases,
it will do so for the purpose of acquiring securities consistent with the
portfolio's investment objective and policies and not for the purpose of
investment leverage or to speculate on interest rate changes; but each
portfolio reserves the right to sell these securities before the settlement
date if deemed advisable.  To the extent required to comply with Securities and
Exchange Commission Release No. IC-10666, when purchasing securities on a
when-issued or delayed delivery basis, each portfolio will maintain in a
segregated account cash or liquid securities equal to the value of
such contracts.





                                24
<PAGE>   74
                            GENERAL FUND INFORMATION


REDEMPTIONS.  Suspension of Redemption or Delay in Payment.  The Fund may not
suspend the right of redemption or delay payment on its shares for more than
seven days except (a) during any period when the New York Stock Exchange is
closed (other than on weekends and customary holidays); (b) when trading in the
markets that the portfolio normally utilizes is restricted or any emergency
exists as determined by the Securities and Exchange Commission, so that
disposal of the portfolio's investments or determination of its net asset value
is not reasonably practicable or (c) for such other periods as the Securities
and Exchange Commission may permit by order for protection of the Fund's
shareholders.

Special Redemptions.  Although it is the present policy of all five of the
portfolios to redeem portfolio shares in cash, if the Board of Directors
determines that a material adverse effect would be experienced by the remaining
shareholders if payment of large redemptions were made wholly in cash, the
portfolios will pay the redemption price in whole or in part by a distribution
of portfolio instruments in lieu of cash, in conformity with the applicable
rules of the Securities and Exchange Commission, taking such instruments at the
same value used to determine net asset value and selecting the instruments in
such manner as the Board of Directors may deem fair and equitable.  If such a
distribution occurs, shareholders receiving instruments and selling them before
their maturity could receive less than the redemption value of such instruments
and could also incur transaction costs.  The portfolios have elected to be
governed by Rule 18f-1 under the Act, pursuant to which the portfolios are
obligated to redeem portfolio shares solely in cash up to the lesser of
$250,000 or 1% of the net asset value of the portfolio during any 90-day period
for any one shareholder of record.


DETERMINATION OF NET ASSET VALUE.  For the Growth Fund, the Value Discovery
Fund and the International Growth Fund, net asset value is not determined on
the days that the New York stock exchange is closed, which include New Year's
Day, President's Day, Good Friday, Memorial Day, Independence Day, Labor Day,
Thanksgiving Day and Christmas Day.

For the Income Fund and the Ready Reserves Fund, net asset value is not
determined on national holidays when New York banks are closed, which include
New Year's Day, Martin Luther King, Jr.'s Birthday, President's Day, Memorial
Day, Independence Day, Labor Day, Columbus Day, Veteran's Day, Thanksgiving Day
and Christmas Day.  Net asset value for these portfolios also is not determined
on Good Friday.

As mentioned in the prospectus, the Ready Reserves Fund values its portfolio
instruments at amortized cost in accordance with Rule 2a-7 under the Investment
Company Act of 1940, which means that they are valued at their acquisition cost
(as adjusted for amortization of premium or discount), rather than at current
market value.  This involves initially valuing an instrument at its cost and
thereafter assuming a constant amortization to maturity of any discount or
premium, regardless of the impact of fluctuating interest rates on the market
value of the instrument.  While this method provides certainty in valuation, it
may result in periods during which value, as determined by amortized cost, is
higher or lower than the price the portfolio would receive if it sold the
instrument.  Calculations are made to compare the value of the portfolio's
investments valued at amortized cost with market values.  Market valuations are
obtained by using actual quotations provided by market makers, estimates of
market value or values obtained from yield data relating to classes of money
market instruments published by reputable sources at the bid price for such
securities.

If a deviation of one-half of one percent or more were to occur between the net
asset value per share calculated by reference to market values and the
portfolio's $1.00 per share net asset value, or if there were any other
deviation that the Board of Directors determined would result in a material
dilution to shareholders or purchasers, the Board of Directors would promptly
consider what action, if any, should be initiated.  If the





                                25
<PAGE>   75
portfolio's net asset value per share (computed using market values) declined,
or was expected to decline, below $1.00 (computed using amortized cost), the
Board of Directors of the Fund might temporarily reduce or suspend dividend
payments in an effort to maintain the net asset value at $1.00 per share.  As a
result of such reduction or suspension of dividends or other action by the
Board of Directors, an investor would receive less income during a given period
than if such a reduction or suspension had not taken place.  Such action could
result in investors receiving no dividends for the period during which they
held shares and receiving, upon redemption, a price per share lower than that
which they paid.  On the other hand, if the portfolio's net asset value per
share (computed using market values) were to increase, or were anticipated to
increase, above $1.00 (computed using amortized cost), the Board of Directors
of the Fund might supplement dividends in an effort to maintain the net asset
value at $1.00 per share.

The Ready Reserves Fund has never had a deviation of one-half of one percent or
more between its net asset value per share calculated by reference to market
values and its $1.00 per share net asset value; therefore, no Board actions of
the type described above have been taken.  To use the amortized cost method of
valuation, the portfolio is limited to investing in instruments that the Board
of Directors has determined present minimal credit risks and that are within
certain rating categories of a nationally recognized statistical rating
organization.


PERFORMANCE.

Historical Performance

In general.  The historical performance or return of the Growth Fund, the Value
Discovery Fund, the International Growth Fund and the Income Fund may be shown
in the form of "average annual total return" and "total return" figures.  The
Income Fund's and Ready Reserves Fund's historical performance or return may
also be shown in the form of "yield figures."  These various measures of
performance are described below.

Average annual total return and total return measure both the net investment
income generated by and the effect of any realized and unrealized appreciation
or depreciation of, the underlying investments of the portfolio, assuming the
reinvestment of all dividends during the period.  Average annual total return
figures represent the average annual percentage change over the period in
question.  Total returns represent the aggregate percentage or dollar value
change over the period in question.  Yield is a measure of the net investment
income per share earned over a specified period, expressed as a percentage of
the net asset value.  Yield is an annualized figure, which means that it
assumes that a portfolio generates the same level of net investment income over
a one-year period.

The performance quotations for all of the portfolios are based upon historical
results and are not necessarily representative of future performance. Returns
and net asset value will fluctuate. The portfolios' performance depends upon
general market conditions, operating expenses and the performance of the
investment manager. Any additional fees charged by a dealer or other financial
services firm would reduce the returns described in this section.

In addition, from time to time the adviser has voluntarily absorbed certain
operating expenses of certain of the portfolios.  For the Income Fund, the
Adviser has voluntarily waived certain advisory management fees for the fiscal
years from 1990 to 1993 and to the extent described under "Management of the
Fund--Investment Adviser and Distributor." For the Value Discovery Fund, the
adviser is currently waiving certain advisory management fees.  Without such
waiver, the performance results noted above for these portfolios would have
been lower.

Average annual total return.  The portfolios' average annual total return is
computed in accordance with a standardized method prescribed by rules of the
Securities and Exchange Commission. The average annual total return for a
specific period is found by first taking a hypothetical $1,000 investment
("initial investment") in a





                                26
<PAGE>   76
portfolio's shares on the first day of the period and computing the "redeemable
value" of that investment at the end of the period. The redeemable value is
then divided by the initial investment and this quotient is taken to the nth
root (n representing the number of years in the period) and 1 is subtracted
from the result, which is then expressed as a percentage.  This calculation
assumes that all income dividends and capital gains distributions by the
portfolio have been reinvested at net asset value on the reinvestment dates
during the period.

The average annual total return for the Value Discovery Fund from commencement  
of operations on December 23, 1996 through December 31, 1996 was 0%.

The average annual total return for the Growth Fund, the International Growth
Fund and the Income Fund for the one-, five- and ten-year periods, or, if less,
from commencement of operations through December 31, 1996 are as follows:

<TABLE>
<CAPTION>
                                    1-YEAR     5-YEAR      10-YEAR OR
                                                          LIFE OF FUND
- -----------------------------------------------------------------------
 <S>                              <C>         <C>        <C>
 GROWTH FUND                      17.99       15.04      15.71

 INTERNATIONAL GROWTH FUND(1)     10.20         -        11.57

 INCOME FUND(2)                    3.07        6.20       8.01
- ----------------------
</TABLE>
(1) Commenced operations on October 1, 1992.
(2) Commenced operations on September 25, 1990.


Total return.  Total return performance for a specific period is calculated by
first taking an investment (assumed below to be $10,000) ("initial investment")
in a portfolio's shares on the first day of the period and computing the
"ending value" of that investment at the end of the period. The total return
percentage is then determined by subtracting the initial investment from the
ending value, dividing the remainder by the initial investment and expressing
the result as a percentage. This calculation assumes that all income and
capital gains dividends by the portfolio have been reinvested at net asset
value on the reinvestment dates during the period. Total return may also be
shown as the increased dollar value of the hypothetical investment over the
period.

The total return for the Value Discovery Fund from December 23, 1996
(Commencement of Operations) through December 31, 1996 was 0%.

The total return for the Growth Fund, the International Growth Fund and the
Income Fund for the one-, five- and ten-year periods, or, if less, from
commencement of operations through December 31, 1996 are as follows:


<TABLE>
<CAPTION>
                                   1-YEAR     5-YEAR     10-YEAR OR
                                                        LIFE OF FUND
- -----------------------------------------------------------------------
 <S>                              <C>        <C>        <C>

 GROWTH FUND                      17.99      101.50     329.70

 INTERNATIONAL GROWTH FUND(1)     10.20        -         59.90

 INCOME FUND(2)                    3.07       35.10      61.90
- ----------------------
</TABLE>

(1) Commenced operations on October 1, 1992.
(2) Commenced operations on September 25, 1990.





                                27
<PAGE>   77
Yield.  Like the portfolios' average annual total return, the yield for the
Income Fund portfolio is computed in accordance with a standardized method
prescribed by rules of the Securities and Exchange Commission.  The yield is
computed by dividing the net investment income per share earned during a
specific one-month or 30-day period by the offering price per share on the last
day of that period according to the following formula:

                         YIELD = 2[(((a-b)/cd)+1)(6) - 1]

<TABLE>
<S>              <C>      <C>     <C>
Where:           a        =       dividends and interest earned during the period
                 b        =       expenses accrued for the period (net of reimbursements)
                 c        =       the average daily number of shares outstanding during the period entitled to
                                  receive dividends
                 d        =       the offering price (net asset value) per share on the last day of the period
</TABLE>

The Income Fund's current yield for the 30-day period ended December 31, 1996
was 6.44%.  Semiannual compounding is assumed.

In computing the foregoing yield, the portfolio follows certain standardized
accounting practices specified by Securities and Exchange Commission rules.
These practices are not necessarily consistent with those that the portfolio
uses to prepare its annual and interim financial statements in accordance with
generally accepted accounting principles.

From time to time, the Fund may include in its sales literature and shareholder
reports a quotation of the current "distribution rate" for the Income Fund.
Distribution rate is simply a measure of the level of income and short-term
capital gain dividends distributed for a specified period.  It differs from
yield, which is a measure of the income actually earned by the Income Fund's
investments and from total return, which is a measure of the income actually
earned by, plus the effect of any realized or unrealized appreciation or
depreciation of, such investments during the period.  Distribution rate,
therefore, is not intended to be a complete measure of performance.
Distribution rate may sometimes be greater than yield since, for instance, it
may include short-term gains (which may be nonrecurring) and may not include
the effect of amortization of bond premiums.

The Ready Reserves Fund's yield quotations as they may appear in advertising
and sales materials also are calculated by a standard method prescribed by
rules of the Securities and Exchange Commission.  Under that method, the
current yield quotation is annualized based on a seven-day period and computed
as follows:  the portfolio's net investment income per share (accrued interest
on portfolio securities, plus or minus amortized purchase discount or premium,
less accrued expenses) is divided by the price per share (expected to remain
constant at $1.00) during the period ("base period return") and the result is
divided by seven and multiplied by 365 and the current yield figure is carried
to the nearest one-hundredth of one percent.  Realized capital gains or losses
and unrealized appreciation or depreciation of investments are not included in
the calculation.  The effective yield is determined by taking the base period
return and calculating the effect of assumed compounding according to the
following formula:

                   YIELD = [(BASE PERIOD RETURN +1)(365/7)] - 1

The Ready Reserve Fund's effective yield is calculated similarly to its current
yield, except that the net investment income earned is assumed to be compounded
when annualized. The Ready Reserves Fund effective yield will be slightly
higher than its current yield due to compounding.

The Ready Reserves Fund's current yield for the seven-day period ended December
31, 1996 was 4.78%.  The Ready Reserves Fund's effective yield for the same
period was 4.89%.





                                28
<PAGE>   78
The Ready Reserves Fund's yield fluctuates and the publication of an annualized
yield quotation is not a representation as to what an investment in the
portfolio will actually yield for any given future period.  Actual yields will
depend not only on changes in interest rates on money market instruments during
the period the investment in the portfolio is held, but also on such matters as
any realized gains and losses and changes in portfolio expenses.

Comparison of Portfolio Performance to Market Indices

From time to time, in marketing and other Fund literature, each portfolio's
performance may be compared to the performance of other mutual funds in general
or to the performance of particular types of mutual funds with similar goals,
as tracked by independent organizations.  Such market comparisons are set forth
briefly below.

From time to time, the portfolios' performance may be compared to that of
various, unmanaged stock indices such as the Standard & Poor's 500 Stock Index,
NASDAQ, Value Line and Russell 1,000, 2,000 and 3,000.  The portfolios'
performance may also be compared to the performance of other growth mutual
funds or mutual fund indices as reported by CDA Investment Technologies, Inc.
("CDA"), Lipper Analytical Services, Inc. ("Lipper") or Morningstar, Inc.
("Morningstar").

      . CDA: CDA is a widely recognized independent mutual fund reporting
      service that is based upon changes in net asset value with all dividends
      reinvested.

      . LIPPER: Lipper is a widely used independent research firm that ranks
      mutual funds' overall performance, investment objectives and assets.
      Lipper performance figures are based on changes in net asset value, with
      all income and capital gain dividends assumed to be reinvested.  Lipper's
      calculations do not include the effect of any sales charges imposed by
      other funds.  Lipper also issues a monthly yield analysis for fixed
      income funds.

      . MORNINGSTAR: Morningstar rates funds on the basis of historical risk
      and total return.  Morningstar's ratings range from five stars (highest)
      to one star (lowest) and represent Morningstar's assessment of the
      historical risk level and total return of a fund as a weighted average
      for three-, five- and ten-year periods.  Ratings are not absolute and do
      not represent future results.

The portfolios may also compare their performance with that of indices, such as
the Consumer Price Index, the Shearson Lehman Intermediate Government/Corporate
Bond Index and the Merrill Lynch Intermediate Term Corporate & Government Bond
Index.  Both the Shearson Lehman and the Merrill Lynch bond indices are
unmanaged and do not adjust for taxes payable on interest or dividends.  When
assessing a portfolio's performance as compared to that of any of these
indicies, it is important to note the differences and similarities between the
investments that the portfolio may purchase and the investments measured by the
applicable indices.

      . CONSUMER PRICE INDEX:  The Consumer Price Index is generally considered
      to be a measure of inflation.

      . SHEARSON LEHMAN GOVERNMENT/CORPORATE INTERMEDIATE BOND INDEX: This
      index generally represents the performance of intermediate government and
      investment grade corporate debt securities under various market
      conditions.

      . MERRILL LYNCH INTERMEDIATE TERM CORPORATE & GOVERNMENT BOND INDEX: This
      index also generally represents the performance of intermediate
      government and investment grade corporate debt securities under various
      market conditions.

Bank product performance may be based upon, among other things, the Bank Rate
Monitor National Index or various certificates of deposit indexes. Performance
of U.S. Treasury obligations may be based upon, among





                                29
<PAGE>   79
other things, various U.S. treasury bill indexes. Certain of these alternative
investments may offer fixed rates of return and guaranteed principal and may be
insured.  Money market fund performance may be based upon, among other things,
the IBC/Donoghue's Money Fund Average (All Taxable). Investors may also want to
compare the historical returns of various investments, performance indexes of
those investments or economic indicators, including but not limited to stocks,
bonds, certificates of deposit, money market funds and U.S. Treasury
obligations and the rate of inflation.

Comparative performance information other than that listed above may be used
from time to time in advertising the International Growth Fund, including data
from Micropal Ltd., an independent fund reporting service and independent
unmanaged indices, such as Morgan Stanley Capital International's Europe,
Australia and the Far East (EAFE) Index or Morgan Stanley Capital
International's All Country World (Free) Except United States (ACWFxUS) Index.

In addition, the portfolios may quote information from industry or financial
publications of general U.S. or international interest, such as information
from Morningstar, The Wall Street Journal, Money Magazine, Forbes, Barron's,
Fortune, The Chicago Tribune, USA Today, Institutional Investor and Registered
Representative.


TAX STATUS.  Each series (portfolio) of the Fund is treated as a separate
entity for accounting and tax purposes.  The Fund has qualified and elected to
be treated as a "regulated investment company" under Subchapter M of the
Internal Revenue Code (the "Code") and intends to continue to so qualify in the
future.  As such, and by complying with the applicable provisions of the Code
regarding the sources of its income, the timing of its distributions and the
diversification of its assets, the Fund will not be subject to federal income
tax on its taxable income (including net short-term and long-term capital
gains) that is distributed to shareholders in accordance with the timing
requirements of the Code.

Each portfolio intends to declare and make distributions during the calendar
year of an amount sufficient to prevent imposition of a 4% nondeductible
federal excise tax.  The required distribution generally is the sum of 98% of a
portfolio's net investment income for the calendar year plus 98% of its capital
gain income for the one-year period ending October 31, plus the sum of any
undistributed net investment income and capital gain net income from the prior
year, less any over-distribution from the prior year.

The Fund is required to withhold Federal income tax at the rate of 31%
(commonly called "backup withholding") from taxable distributions to
shareholders that do not provide the fund with a taxpayer identification
(social security) number or in other circumstances where shareholders have
failed to comply with Internal Revenue Service regulations.

Special tax provisions may accelerate or defer recognition of certain
gains or losses, change the character of certain gains or losses or alter the
holding periods of certain of a portfolio's securities.  Specifically, the
mark-to-market rules of the Internal Revenue Code (the "Code") may require a
portfolio to recognize unrealized gains and losses on certain forward
contracts, futures and foreign currency futures held by a portfolio at the end
of the Fund's fiscal year.  Under these provisions, 60% of any capital gain net
income or loss recognized will generally be treated as long-term and 40% as
short-term.  Although certain foreign currency forward contracts and foreign
currency futures contracts are marked-to-market, any gain or loss is generally
treated as ordinary under Section 988 of the Code (see below).  In addition,
the straddle rules of the Code require deferral of certain losses realized on
positions of a straddle to the extent that the portfolio has unrealized gains
in offsetting positions at year end. The portfolios have elected to
mark-to-market their investments in passive foreign investment companies for
Federal income tax purposes.

Foreign exchange gains and losses realized by the Fund in connection with
certain transactions that involve foreign currency-denominated debt securities,
certain foreign currency options, foreign currency forward





                                30
<PAGE>   80
contracts, foreign currencies, or payables or receivables denominated in a
foreign currency are subject to Section 988 of the Code, which generally causes
such gains and losses to be treated as ordinary income and losses and may
affect the amount, timing and character of distributions to shareholders.  For
example, if a portfolio sold a foreign stock or bond and part of the gain or
loss on the sale was attributable to an increase or decrease in the value of a
foreign currency, then the currency gain or loss may be treated as ordinary
income or loss. If such transactions result in higher net ordinary income, the
dividends paid by the portfolio will be increased; if such transactions result
in lower net ordinary income, a portion of dividends paid could be
classified as a return of capital.

The International Growth Fund may qualify for and make an election permitted
under the "pass through" provisions of Section 853 of the Internal Revenue
Code, which allows a regulated investment company to elect to have its foreign
tax credit taken by its shareholders instead of on its own tax return.  To be
eligible for this credit, more than 50% of the value of the Fund's total assets
at the close of its taxable year must consist of stock or other securities in
foreign corporations, and the Fund must have distributed at least 90% of its
taxable income.

If the Fund makes this election, it may not take any foreign tax credit and may
not take a deduction for foreign taxes paid.  However, the Fund is allowed to
include the amount of foreign taxes paid in a taxable year in its dividends
paid deduction.  Each shareholder would then include in his gross income, and
treat as paid by him, his proportionate share of the foreign taxes paid by the
Fund.

If the U.S. government were to impose any restrictions, through taxation or
other means, on foreign investments by U.S. investors such as those to be made
through the portfolio, the Board of Directors of the Fund will promptly review
the policies of the International Growth Fund to determine whether significant
changes in its investments are appropriate.

Non-U.S. investors not engaged in a U.S. trade or business with which their
investment in the Fund is effectively connected will be subject to U.S. Federal
income tax treatment that is different from that described above and in the
prospectus.  Such investors may be subject to nonresident alien withholding tax
at the rate of 30% (or a lower rate under an applicable tax treaty) on amounts
treated as ordinary dividends from the Fund and, unless an effective IRS Form
W-8 or authorized substitute for Form W-8 is on file, to 31% backup withholding
on certain other payments from the Fund.  Non-U.S. investors should consult
their tax advisers regarding such treatment and the application of foreign
taxes to an investment in the Fund.


RETIREMENT PLANS.  The Fund offers a variety of retirement investment programs
whereby contributions are invested in shares of the Fund's portfolios and any
income dividends or capital gain distributions are reinvested in additional
full and fractional shares of the Fund.

Individual Retirement Accounts.  The Fund has available Individual Retirement
Accounts ("IRAs") under Internal Revenue Service approved prototypes. IRA
contributions are fully deductible only to (1) taxpayers who are not active
participants in an employer-sponsored retirement plan and (2) taxpayers who are
active participants in an employer-sponsored plan but who have adjusted gross
income below a specified level. For these purposes, a taxpayer will be deemed
to be an active participant in an employer-sponsored retirement plan if for any
part of the plan year either he or his spouse is an active participant under a
qualified pension plan, a qualified profit sharing or money purchase plan, a
403(a) annuity plan, a 403(b) annuity program, a Simplified Employee Pension
("SEP") plan or a government plan (other than a plan maintained for state and
local employees under Section 457 of the Internal Revenue Code).

Married taxpayers filing a joint return who are active participants in an
employer-sponsored plan may make tax deductible IRA contributions up to $2,000
individually, or $4,000 jointly, if their adjusted gross income ("AGI") is
$40,000 or less. The IRA deduction is gradually phased out for AGI between
$40,000 and $50,000. For single





                                31
<PAGE>   81
taxpayers who are active participants in an employer-sponsored plan, a $2,000
deductible IRA contribution is available for taxpayers with AGI up to $25,000.
This deduction is gradually phased out for AGI between $25,000 and $35,000.  To
the extent that the IRA deduction is reduced or eliminated by the phase-out
rule, an individual may elect to make nondeductible IRA contributions which,
when combined with any deductible contributions, may not exceed $2,000
individually or $4,000 jointly for a spousal IRA. Tax deductible IRA
contributions are not subject to Federal income taxation until such
contributions are withdrawn.

Simplified Employee Pension Plans.  An employer may establish a SEP plan under
which the employer makes contributions to all eligible employees' IRAs. Any
portfolio's shares may be used for this purpose.

Qualified Retirement Plans.  A corporation, partnership, or sole proprietorship
may establish a qualified money purchase pension and profit sharing plan and
make contributions for each participant up to the lesser of 25% of each
participant's gross compensation (20% of gross compensation for self-employed
persons) or $30,000. Such contributions may be made by the employer and, if
certain conditions are met, participants may also make nondeductible voluntary
contributions.

Under the Internal Revenue Code, an investor has at least seven days in which
to revoke an IRA after receiving certain explanatory information about the
plan. Individuals who have received distributions from certain qualified plans
may roll over all or part of such distributions into an IRA, which will defer
taxes on the distributions and shelter investment earnings.  Trustees of
qualified retirement plans and 403(b)(7) accounts are required by law to
withhold 20% of the taxable portion of any distribution that is eligible to be
"rolled over."  The 20% withholding requirement, however, does not apply to
distributions from IRAs or any part of a distribution that is transferred
directly to another qualified retirement plan, 403(b)(7) account or IRA.
Shareholders are advised to consult with a tax professional regarding this
requirement.


INDEPENDENT AUDITORS.  The Fund's independent auditors are Ernst & Young LLP,
Sears Tower, 233 South Wacker Drive, Chicago, Illinois 60606.  Ernst & Young
audits and reports upon the Fund's annual financial statements, reviews certain
regulatory reports and the Fund's Federal tax returns and performs other
professional accounting, auditing, tax and advisory services when engaged to do
so by the Fund.
LEGAL COUNSEL. Vedder, Price, Kaufman & Kammholz, 222 North LaSalle Street,
Chicago, Illinois 60601 is the Fund's Counsel.
CUSTODIAN.  The Fund's custodian, Investors Bank and Trust Company, 89 South
Street, Boston, Massachusetts 02111, has custody of all securities and cash of
the Fund and attends to the collection of principal and income and payment for
and collection of proceeds of securities bought and sold by the Fund.


TRANSFER AGENT SERVICES.  State Street Bank and Trust Company ("State Street"),
225 Franklin Street, Boston, Massachusetts 02110, is the Fund's transfer agent
and dividend-paying agent. State Street, as the shareholder service agent,
provides certain bookkeeping, data processing and administrative services
pertaining to the maintenance of shareholder accounts.


REPORTS TO SHAREHOLDERS.  Shareholders will receive annual audited financial
statements and semi-annual unaudited financial statements.


                               SHAREHOLDER RIGHTS

All shares of each portfolio have equal rights with respect to dividends,
assets and liquidation of a portfolio and equal, noncumulative voting rights.
Noncumulative voting rights allow the holder or holders of a majority of





                                32
<PAGE>   82
shares, voting together for the election of directors, to elect all the
directors.  All shares of each portfolio will be voted in the aggregate, except
when a separate vote by portfolio is required under the Investment Company Act
of 1940.  Shares are fully paid and nonaccessable when issued, are transferable
without restriction and have no preemptive or conversion rights.

Under Maryland law, the Fund generally is not required to hold annual
shareholders' meetings.  Upon the written request of ten or more shareholders
that have held Fund shares for at least six months in an amount equal to the
lesser of 1% of the outstanding shares or $25,000, the Fund will either
disseminate appropriate materials (at the expense of the requesting
shareholders) or provide such shareholders access to a list of names and
addresses of all shareholders of record.  The written notice must state that
the shareholders making such request wish to communicate with the other
shareholders to obtain the signatures necessary to demand a meeting to consider
removal of a director.  The Fund will hold Shareholders' meetings when
requested to do so in writing by one or more shareholders collectively holding
at least 10% of the shares entitled to vote or when determined by the Board of
Directors in their discretion.  Shareholders' meetings also will be held in
connection with the following matters: (1) the election or removal of
directors, if a meeting is called for such purpose; (2) the adoption of any
contract for which shareholder approval is required by the Act; (3) any
termination of the Fund; (4) any amendment of the articles of incorporation
and (5) such additional matters as may be required by law, the articles of
incorporation, the by-laws of the Fund, or any registration of the Fund with
the Securities and Exchange Commission or any state, or that the directors may
consider necessary or desirable, such as changes in fundamental investment
objectives, policies or restrictions.

The Fund's directors serve until the next meeting of shareholders, if any,
called for the purpose of electing directors and until the election and
qualification of their successors or until a director sooner dies, resigns,
retires, or is removed by a majority vote of the shares entitled to vote or by
a majority of the directors.  In accordance with the Act, the Fund will hold a
shareholder meeting for the election of directors at such time that (1) less
than a majority of the directors has been elected by the shareholders and (2)
if, as a result of a vacancy in the Board of Directors, less than two-thirds of
the directors have been elected by the shareholders.  A director may be removed
from office by a vote of the holders of a majority of the outstanding shares
entitled to vote.

                                  FUND HISTORY
The Fund was organized as a Maryland corporation on September 22, 1987 under    
the name of William Blair Ready Reserves, Inc. On April 30, 1991, a
reorganization of the Fund and Growth Industry Shares, Inc., a Maryland
corporation, occurred such that Growth Industry Shares, Inc. was reorganized
into a separate portfolio of the Fund, now the Growth Fund portfolio, and the
Fund changed its name to William Blair Mutual Funds, Inc.  Presently, the Fund
is offering shares of the five portfolios described in the prospectus. 
The Board of Directors of the Fund may, however, establish additional
portfolios with different investment objectives, policies and restrictions in
the future.





                                33
<PAGE>   83
                       FINANCIAL INFORMATION OF THE FUND
The Fund's audited financial statements, including the notes thereto, contained 
in the Fund's annual reports to shareholders for the period ended December 31,
1996, are incorporated herein by reference. Additional copies of the reports to
shareholders may be obtained without charge by writing or calling the Fund.




                                34
<PAGE>   84
   

                       WILLIAM BLAIR MUTUAL FUNDS, INC.
                             Value Discovery Fund



                    Unaudited Financial Statement for the
                     Five-Month Period ended May 31, 1997
    
<PAGE>   85
<TABLE>   
<CAPTION> 

001001 7730 0068                                                                                                 MCPB4197 4197 
FUND# 77316                           INVESTORS BANK & TRUST FUND ACCOUNTING AND CUSTODY TRACKING SYSTEM            05/30/97
WM BLAIR VALUE DISCO                                      DETAILED FUND STATEMENT                                          1
   
                                            Assets and Liabilities for the Five-Month Period
                                                            ended May 31, 1997                                  
                                                                                                                             



          
          
  ACCT #   ACCOUNT NAME                            BALANCE          ACCT #   ACCOUNT NAME                            BALANCE
  ------   ------------                            -------          ------   ------------                            -------
  <S>      <C>                              <C>                     <C>      <C>                           <C>
              ASSETS                                                            LIABILITIES
  902010   SECURITIES OWNED @ MARKET        14,529,003.650          303020   A/P SECURITIES PURCHASED             512,478.12
  110000   SHORT TERM INVESTMENTS             4,573,587.26
  118020   A/R SECURITIES SOLD                  326,471.09          306220   PAYABLE FOR MGT FEE                   32,988.34
  118040   A/R CAP STOCK SOLD                     6,000.00          306580   ACC OTHER/MISC                        55,316.35
  118060   DIVIDENDS RECEIVABLE                   4,118.00          306803   ACCRUED ORGANIZATION EXP              37,117.79
  123000   INTEREST RECEIVABLE                      644.11                                                 -----------------
  150803   PREPAID ORG EXP                       37,117.79                      TOTAL ACCRUED EXPENSES            125,422.48
                                         -----------------                                                                  
              GROSS ASSETS                   19,476,941.90                                                 -----------------
                                                                                GROSS LIABILITIES                 637,900.60
           NET ASSETS                        18,839,041.30

           NET SHARES OUTSTANDING            1,769,014.571

           NET ASSET VALUE/SHARE                     10.65

           OFFERING PRICE/SHARE                      10.65

              NON-CURRENT ASSETS
  104000   ID COST                           13,365,366.30
</TABLE>

<PAGE>   86
<TABLE>     
<CAPTION>   

001001 7730 0068                                                                                          MCPB4197 4197
FUND# 77316                    INVESTORS BANK & TRUST FUND ACCOUNTING AND CUSTODY TRACKING SYSTEM            05/30/97
WM BLAIR VALUE DISCO                                 DETAILED FUND STATEMENT                                        2 
                                                                                                                         
                                           Statement of Operations for the Five-Month 
                                                   Period ended May 31, 1997
            
                
  ACCT #   ACCOUNT NAME                            BALANCE          ACCT #   ACCOUNT NAME                            BALANCE
  ------   ------------                            -------          ------   ------------                            -------
  <S>      <C>                           <C>                        <C>      <C>                           <C>
              INCOME                                                            GAIN/LOSS
  401200   DIVIDEND INCOME                       32,740.25                   UNREALIZED GAIN/LOSS               1,163,637.35
  401100   INTEREST INCOME                      132,164.17                                                 -----------------
                                         -----------------                     TOTAL UNREALIZED G/L             1,163,637.35
              GROSS INCOME                      164,904.42
                                                                    603060   INVESTMENT GAIN SHORT 3               59,175.83
              EXPENSES                                              603080   INVESTMENT LOSS SHORT 3              122,325.05-
  506220   MANAGEMENT FEE EXP                    32,988.34-         603100   INVESTMNT GAIN SHORT TERM             19,627.92
  506580   OTHER/MISC EXP                        54,953.95-         603120   INVESTMNT LOSS SHORT TERM              9,180.18-
  506803   ORGANIZATION EXP                       2,025.95-         603161   REALIZED G/L FUTURES                 161,655.00-
                                         -----------------                                                 ----------------- 
              GROSS EXPENSES                     89,968.24-                     REALIZED G/L YTD                  214,356.48-
           NET INCOME                            74,936.18                                                                  
                                                                                                           -----------------
                                         -----------------                      UNDISTRIBUTED G/L YTD             214,356.48-
           UNDISTRIBUTED INCOME YTD              74,936.18
           UNDISTRIBUTED INCOME PY                  362.40-                                               ------------------
                                         -----------------                   NET UNDISTRIBUTED G/L                214,356.48-
           NET UNDISTRIBUTED INCOME              74,573.78
           NET UNDISTRIBUTED/SHARE                    0.04

</TABLE>
<PAGE>   87
   

                                                                      
                                                                  


                       WILLIAM BLAIR MUTUAL FUNDS, INC.
                             Value Discovery Fund
                     Statements of Changes in Net Assets
<TABLE>    
<CAPTION>  


                                                                             (all amounts in thousands)
                                                                  FOR THE PERIOD              
                                                                  FROM JANUARY 1                 PERIOD ENDED
                                                               THROUGH MAY 31, 1997           DECEMBER 31, 1996(a)
                                                               --------------------           --------------------
<S>                                                              <C>                              <C>
Operations
 Net investment income                                             $       75                       $       --
 Net realized (loss) on investments                                      (214)                              --
 Change in net unrealized appreciation/depreciation
  on investments                                                        1,163                               --
                                                                   ----------                       ----------
  Net increase in net assets resulting from operations                  1,024                               --

Distribution to shareholders from
 Net investment income                                                     --                               --
 Net realized gain                                                         --                               --
                                                                   ----------                       ----------
                                                                           --                               --

Capital stock transactions                                             
 Shares sold                                                           15,971                            2,175
 Shares issued in reinvestment of income                                   
   dividends and capital gain distributions                                --                               --
 Less shares redeemed                                                    (331)                              --
                                                                   ----------                       ----------
Change from capital stock transactions                                 15,640                            2,175
                                                                   ----------                       ----------
                                                                       16,664                            2,175
 Change in net assets
Net assets                                                              
 Beginning of period                                                    2,175                               --
                                                                   ----------                       ----------
 End of period                                                     $   18,839                       $    2,175
- -------------------------                                          ==========                       ==========
 Undistributed net investment income
  at the end of the period                                         $       75                       $       --
- -------------------------                                          ==========                       ==========
Capital stock transactions
 Shares sold                                                            1,584                              218
 Shares issued in reinvestment of income
  dividends and capital gain distributions                                 --                               --
 Less shares redeemed                                                     (33)                              --
                                                                   ----------                       ----------
Change from capital stock transactions                                  1,551                              218
- -------------------------                                          ==========                       ==========
(a) For the period from December 23, 1996 (Commencement of Operations) to December 31, 1996.

</TABLE>
    
<PAGE>   88
                        ANNUAL REPORT/ DECEMBER, 1996

                        WILLIAM BLAIR MUTUAL FUNDS, INC.

                                  GROWTH FUND

                              VALUE DISCOVERY FUND

                           INTERNATIONAL GROWTH FUND

                                  INCOME FUND

                              READY RESERVES FUND


This report has been prepared for the information of the shareholders of William
Blair Mutual Funds, Inc. It is not to be construed as an offering to sell or buy
any securities of the Fund. Such offering is made only by the Prospectus.
<PAGE>   89
TABLE OF CONTENTS

Overview                                        3
   A Letter from the President                  3

Growth Fund                                     5
   A Letter from the Portfolio Managers         5
   Portfolio of Investments                     8

Value Discovery Fund                           10
   A Letter from the Portfolio Managers        10
   Portfolio of Investments                    11

International Growth Fund                      12
   A Letter from the Portfolio Manager         12
   Portfolio of Investments                    15

Income Fund                                    18
   A Letter from the Portfolio Manager         18
   Portfolio of Investments                    20

Ready Reserves Fund                            22
   A Letter from the Portfolio Manager         22
   Portfolio of Investments                    23

Notes to Financial Statements                  30
Board of Directors                             40
Officers                                       40



                                       2
<PAGE>   90
 
BLAIR MUTUAL OVERVIEW LOGO

- --------------------------------------------------------------------------------
                             Performance Highlights
 
<TABLE>
<CAPTION>
                                          1996            1995            1994             1993
<S>                                       <C>             <C>             <C>              <C>
 Growth Fund                              18.0%           29.1%            6.5%            15.5%
  S&P 500 Index                           23.3            37.5             1.3             10.0
  Russell 2000 Index                      16.5            28.4            (1.8)            18.9
 Value Discovery Fund (Inception 12/23/96)
 International Growth Fund                10.2             7.2           (0.04)            33.6
  Lipper International Index              14.4            10.0            (0.7)            39.2
  MSCI AC WLD ex US Index*                 6.7             9.9             6.6             34.9
 Income Fund                               3.0            14.4            (0.7)             7.8
  Lehman Intermediate Govt./Corp.
    Index                                  4.1            15.3            (1.9)             8.8
 Ready Reserves Fund                       4.8             5.5             3.7              2.6
  S&P-rated AAA Money Market Funds         4.8             5.4             3.6              2.0
</TABLE>
 
- --------------------------------------------------------------------------------
 
                              Investor Information
                     For the Period Ended December 31, 1996
 
<TABLE>
<CAPTION>
                                                     Value        International                   Ready
                                       Growth      Discovery         Growth          Income      Reserves
                                        Fund         Fund             Fund            Fund         Fund
<S>                                    <C>         <C>            <C>                <C>         <C>
 Ending Net Assets (in millions)        $502           $2             $105            $150         $761
 Portfolio Turnover Rate (%)              43           --               89              66           --
 Expense Ratio (%)                       .79           --             1.44             .70          .71
 Sales Load                             None         None             None            None         None
 Redemption Fees                        None         None             None            None         None
 Exchange Fees                          None         None             None            None         None
 12b-1 Fees                             None         None             None            None         None
</TABLE>
 
- --------------------------------------------------------------------------------
 
* Morgan Stanley Capital International All Country World Free except U.S. Index


A LETTER FROM THE PRESIDENT 



[PHOTO ROCKY BARBER]

Dear Shareholders:
 
  William Blair Mutual Funds experienced a dynamic year in 1996.  While it was a
difficult year to outperform the indices, all of our funds had good results. 
The Growth Fund's return of 18%, while weak in comparison to the very large
capitalization S&P 500, was competitive with the returns posted by other mutual
funds in its peer group.  On a relative basis, our other funds fared better,
with returns that were generally in line with their benchmarks.

  During the year, we made several changes that will affect the future
performance of the funds.  First, after many months of consideration and
planning, we decided to move the management of the International Growth Fund to
a dedicated team of in-house portfolio managers/analysts.  We believe this will
increase the focus on individual companies in the portfolio and renew the
emphasis on small and mid-sized (capitalization) growth issues outside of the
United States.  George Greig and his team of three assumed management
responsibility in the fourth quarter, and we look forward to a good 1997.  I
urge you to read his report and consider adding to and diversifying your
portfolio with this fund.


                                                                (continued)


                                        3
<PAGE>   91
        Just before year end we introduced a new portfolio, the Value Discovery
Fund, which invests in small emerging companies with inexpensive valuations
that do not adequately reflect their growth potential.  This portfolio is run
by a trio of experienced portfolio managers/analysts headed by Glen Kleczka.  We
think that smaller cap value is an under-researched area with substantial
capital gains potential for investors.
        Our administrative and client services areas have been revamped in
order to improve customer service and to maintain a low expense structure.  We
remain very proud of our relatively low expense ratios that allow more of the
portfolio return to flow to shareholders.  As we look to years ahead when
portfolio returns may not be double digits as has been the case in the equity
markets over the past two years, lower expenses will be a significant component
in delivering superior returns.
        We are very excited about the growth and opportunities within William
Blair Mutual Funds and look forward to serving your investment needs for many
years to come.

Rocky Barber




                                      4
<PAGE>   92
 
BLAIR MUTUAL GROWTH FUND LOGO
 
                             Performance Highlights
 
<TABLE>
<CAPTION>
                                                1996       1995       1994       1993        1992
<S>                                             <C>        <C>        <C>        <C>         <C>
 Growth Fund                                    18.0%      29.1%      6.5%       15.5%        7.6%
  S&P 500 Index                                 23.3       37.5       1.3        10.0         7.7
  Russell 2000 Index                            16.5       28.4       (1.8)      18.9        18.4
</TABLE>
 
- --------------------------------------------------------------------------------
 
                              Investor Information
 
<TABLE>
<CAPTION>
                                                     1996       1995       1994       1993       1992
<S>                                                  <C>        <C>        <C>        <C>        <C>
 Ending Net Assets (in millions)                     $502       $363       $218       $150       $111
 Portfolio Turnover Rate (%)                          43         32         46         55          27
 Expense Ratio (%)                                   .79        .65        .71        .78         .83
</TABLE>
 
- --------------------------------------------------------------------------------
 
[A LETTER FROM THE PORTFOLIO MANAGERS]

[PHOTO ROCKY BARBER]

[PHOTO MARK A. FULLER III]

Dear Shareholders:

        For the second year in a row the equity market has registered a strong
gain, with the S&P 500 up 23%.  However, the strength was again concentrated in
the very largest capitalization issues, and most mid-sized to smaller companies
settled for more modest returns.  These trends can be seen clearly in the
tables highlighted above and below.

                               1996         1995            1994
- -----------------------------------------------------------------------------
WILLIAM BLAIR GROWTH FUND      18.0%        29.1%            6.5%
Lipper Growth Fund Average     17.5         31.2            -1.6
- -----------------------------------------------------------------------------

Stronger than expected economic growth coupled with a substantial increase in
the value of the U.S. dollar provided the underpinnings of investor fervor for
large cap stocks.  As we look to 1997 we expect domestic growth to moderate and
dollar appreciation to subside.  Inflation and interest rates are likely to
remain well behaved, so while equity prices in general are historically high,
we do not fear a major sell-off in the market.  Indeed, we expect that slower
GNP growth in 1997 will increase the attractiveness of smaller stocks as many
of our companies are less dependent on a strong economy to support their
growth.  If, as we expect, larger companies only grow 5-10% in 1997, then
smaller companies in our portfolio growing 15-20+% will look relatively more
attractive than the past two years when almost all companies, whether large or
small, were 15-20% gains.

        Our larger cap stocks performed well in 1996, although much of the
strength was concentrated in the financial services sector and in "Wintel"
(short for Microsoft WINdows and InTEL)-the dynamic duo that have a dominant
position in PCs.  While the fund's exposure to smaller and medium sized
companies has been more limited over the past 18 months (currently about 20% in
the under $1 billion, or small, capitalization sector), even this more modest
allocation to an underperforming area has caused the fund as a whole to lag the
S&P 500 in 1995 and 1996.

        The final quarter of 1996 saw small cap stock performance shift away
from the quality growth franchise that we covet.  Our emphasis on companies
with more predictable growth has a defensive nature to it that serves us well
in most markets.  However,

                                                           


                                        5



<PAGE>   93
domestic economic data suggesting stronger growth helped boost more economically
sensitive sectors such as energy, capital goods and technology while more
defensive growth sectors such as health care, distribution and business services
lagged.
     Small cap holdings that performed particularly well in 1996 often were
driven by strong earnings trends that exceeded expectations. Good examples of
this include HEARTLAND EXPRESS, ACXIOM, CATALINA MARKETING AND QUINTILES
TRANSNATIONAL. Conversely, disappointments were treated very harshly, and single
day drops of 25% or more in the stock price were not unusual. As a result,
stocks such as DIGI INTERNATIONAL, SUNGLASS HUT AND PEAK TECHNOLOGIES failed to
sustain their growth trendlines and represented setbacks for the portfolio.
     The outlook for 1997 is quite dependent upon the level of economic growth
and the behavior of interest rates and inflation. While we can't predict the
future, after two years of strong gains it is prudent to lower our expectations
for the near term. We expect further slowing in corporate earnings growth this
year, primarily due to tough earnings comparisons against a surprisingly strong
1996. If the economy begins to slow in the second half of 1997, the relative
earnings growth of the Growth Fund will look very attractive against the market
and should improve our performance. In the meantime, while we recognize that the
use of small and large growth companies has hindered our performance for the
past two years, we remain committed to the investment philosophy and disciplines
that have served us well over the long term.


Rocky Barber                                        Mark A. Fuller III







                                       6
<PAGE>   94
 
             [GROWTH FUND WILLIAM BLAIR MUTUAL FUNDS, INC. LOGO]
 
                ILLUSTRATION OF AN ASSUMED INVESTMENT OF $10,000
      WITH REINVESTMENT OF CAPITAL GAIN DISTRIBUTIONS AND INCOME DIVIDENDS
 
<TABLE>
<CAPTION>
                                   [GRAPH]

         MEASUREMENT PERIOD                 GROWTH
        (FISCAL YEAR COVERED)                FUND            S&P 500
<S>                                    <C>               <C>
1/87                                         10000             10000
12/87                                        10799             10517
12/88                                        11567             12253
12/89                                        15090             16104
12/90                                        14785             15590
12/91                                        21345             20352
12/92                                        22969             21916
12/93                                        26532             24107
12/94                                        28245             24427
12/95                                        36456             33588
12/96                                        43013             41396
</TABLE>                                     
 
                                        7
<PAGE>   95
 
                       (BLAIR MUTUAL GROWTH FUND LOGO)
 
                            PORTFOLIO OF INVESTMENTS
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
Shares                                              Value
- ------                                              -----
<S>     <C>  <C>                                   <C>
COMMON STOCKS
APPLIED TECHNOLOGY -- 18.6%
   285   *   Acxiom Corporation                    $  6,849
   432   *   Airtouch Communications, Inc.           10,911
   187   *   American Management Systems              4,588
   250       Automatic Data Processing, Inc.         10,705
   142   *   B A Merchant Services, Inc., Class
               "A"                                    2,536
   115   *   BISYS Group, Inc.                        4,267
   140   *   Catalina Marketing Corporation           7,718
   222       Cognizant Corporation                    7,320
   100   *   Desktop Data                             1,930
   340       First Data Corporation                  12,423
   204   *   NFO Research, Inc.                       4,497
   288   *   Paging Network, Inc.                     4,393
    82       Reuters Holdings PLC (ADR)               6,244
   123       Shared Medical Systems Corporation       6,058
    83   *   Sterling Commerce, Inc.                  2,912
                                                   --------
                                                     93,351
                                                   --------
TECHNOLOGY -- 14.6%
   172   *   Broderbund Software, Inc.                5,131
    72   *   Electronic Arts                          2,156
    96       Intel Corporation                       12,574
   144   *   Intuit, Inc.                             4,540
   150       Linear Technology Corporation            6,581
   154   *   Microsoft Corporation                   12,695
    94       Molex Incorporated                       3,669
   152       Molex Incorporated, Class "A"            5,426
   115   *   Oracle Corporation                       4,811
    48   *   Solectron Corporation                    2,563
   177   *   Xilinx, Inc.                             6,529
   280   *   Zebra Technologies Corporation,
               Class "A"                              6,541
                                                   --------
                                                     73,216
                                                   --------
 
HEALTHCARE-RELATED SPECIALTIES -- 13.5%
    48   *   Amgen, Inc.                              2,611
   288   *   Elan PLC (ADR)                           9,579
   274   *   Health Care & Retirement
               Corporation                            7,856
   192   *   Healthsouth Rehabilitation
               Corporation                            7,418
   190       Medtronic, Inc.                         12,920
   224       Omnicare, Inc.                           7,206
    66   *   Quintiles Transnational
               Corporation                            4,371
    96   *   R. P. Scherer Corporation                4,825
   160       Smithkline Beecham PLC (ADR)            10,880
                                                   --------
                                                     67,666
                                                   --------
</TABLE>
 
<TABLE>
<CAPTION>
Shares                                              Value
- ------                                              -----
<S>                                                <C>
CONSUMER RETAIL -- 13.4%
   144       Albertson's, Inc.                     $  5,131
   240       CVS Corporation                          9,933
   188   *   Eckerd Corporation                       6,019
   230       Home Depot, Inc.                        11,552
    86   *   Kohl's Corporation                       3,392
   307   *   Office Depot, Inc.                       5,454
   155   *   PetSmart, Inc.                           3,384
   236   *   Staples, Inc.                            4,258
   118   *   Starbucks Corporation                    3,381
   209   *   Viking Office Products, Inc.             5,571
   154       Walgreen Company                         6,146
   133       Whole Foods Market, Inc.                 2,992
                                                   --------
                                                     67,213
                                                   --------
FINANCIAL SERVICES -- 11.1%
   204       Associates First Capital Corp.,
               Class "A"                              9,016
   304   *   Credit Acceptance Corporation            7,144
    76       Federal Home Loan Mortgage
               Corporation                            8,416
    96       Household International, Inc.            8,858
   266       MBNA Corporation                        11,059
   173       State Street Boston Corporation         11,149
                                                   --------
                                                     55,642
                                                   --------
DISTRIBUTION -- 9.0%
   217   *   Airgas, Inc.                             4,778
   154       Alco Standard Corporation                7,932
   128   *   Black Box Corporation                    5,292
   144       Cardinal Health, Inc.                    8,390
   123   *   Gulf South Medical Supply, Inc.          3,164
   299   *   JP Foodservice, Inc.                     8,322
   201   *   MSC Industrial Direct Co., Class
               "A"                                    7,426
                                                   --------
                                                     45,304
                                                   --------
BUSINESS SERVICES -- 9.0%
   106       Cintas Corporation                       6,206
   316   *   Heartland Express, Inc.                  7,703
   126   *   Interim Services, Inc.                   4,490
   228   *   Knight Transportation, Inc.              4,333
   145   *   Patterson Dental Co.                     4,083
   154       Reynolds & Reynolds, Inc., Class
               "A"                                    3,995
   125   *   Robert Half International, Inc.          4,304
   140   *   Rural/Metro Corporation                  5,054
   141       Wallace Computer Services, Inc.          4,877
                                                   --------
                                                     45,045
                                                   --------
INDUSTRIAL PRODUCTS -- 4.3%
   142       Danaher Corporation                      6,622
   245       M.A. Hanna Company                       5,366
   229       Minerals Technologies, Inc.              9,394
                                                   --------
                                                     21,382
                                                   --------
</TABLE>
 
                                        8
<PAGE>   96
 
 
<TABLE>
<CAPTION>
Shares                                              Value
- -----------------------------------------------    --------
COMMON STOCKS (CONTINUED)
SPECIALTY CONSUMER SERVICES
  AND PRODUCTS -- 4.1%
<S>     <C>  <C>                                   <C>
    54   *   Blyth Industries, Inc.                $  2,453
   134   *   Boston Chicken, Inc.                     4,802
   250   *   CUC International, Inc.                  5,937
   147   *   Day Runner, Inc.                         2,872
   180   *   Department 56, Inc.                      4,463
                                                   --------
                                                     20,527
                                                   --------
FOOD-RELATED COMPANIES -- .8%
   144       Pepsico, Inc.                            4,214
                                                   --------
                    TOTAL COMMON STOCK -- 98.4%     493,560
                                                   --------
             (cost $355,663)
 
<CAPTION>
Principal Amount                                    Value
- -----------------------------------------------    --------
<S>     <C>  <C>                                   <C>
SHORT-TERM INVESTMENTS
$  322       Associates Corp. of North America
               Demand Note, 5.23%, due 1/2/97      $    322
 2,000       Ford Motor Credit Corp., 5.42%,
               due 1/17/97                            2,000
 2,707       General Motors Acceptance
               Corporation 5.39%, due 1/24/97         2,707
 1,995       GE Capital Corp., 5.40%, due
               1/31/97                                1,995
                                                   --------
             TOTAL SHORT-TERM
               INVESTMENTS -- 1.4%                    7,024
                                                   --------
             (cost $7,024)
             TOTAL INVESTMENTS -- 99.8%             500,584
             (COST $362,687)
             CASH AND OTHER ASSETS, LESS
               LIABILITIES -- .2%                     1,190
                                                   --------
             NET ASSETS -- 100.0%                  $501,774
                                                   ========
</TABLE>
 
- ---------------
* Non-income producing securities
 
ADR = American Depository Receipt
 
                See accompanying Notes to Financial Statements.
 
                                        9
<PAGE>   97
 
VALUE DISCOVERY FUND  (BLAIR MUTUAL GROWTH FUND LOGO)

A Letter from the
Portolio Managers

[Photo Glen Kleczka]


[Photo Cappy Price]


[Photo David Mitchell]
 

Dear Shareholders:

        We are pleased to announce the addition of the Value Discovery Fund to
the William Blair Mutual Funds family.  The fund was officially launched
December 23, 1996 and is currently accepting capital contributions.
        The name "Value Discovery" was chosen for our fund because we will
invest using a value investment discipline.  Value investing can be likened to
a process of discovery.  Your investment team will discover companies whose
future growth prospects are underestimated by the market.  We will focus on
companies that possess excellent emerging growth characteristics but may not
yet have an established, historical growth record.  We believe these companies
are often overlooked as investors extrapolate past performance in formulating a
future outlook.  Emerging growth companies often trade like value stocks
because they lack an established record of growth.  Investors tend to assume
that a lack of historical growth portends diminished emerging growth
opportunities. We believe otherwise.
        Success in investment management means producing returns above and
beyond a market benchmark on a consistent basis.  Our goal is to consistently
outperform the Russell 2000 Index which tracks the performance of small
companies.  Value Discovery invests in companies with market capitalizations
from $20 million to $1.5 billion.  Of the over 20,000 publicly-traded
companies in the U.S., approximately 70% have market capitalizations of less
than $300 million, and 90% have less than $1.5 billion.  We will concentrate on
this universe of small companies to produce superior returns.  These companies,
we believe, are growing aster than larger companies and have less research
coverage by investment firms.
        The Value Discovery Fund will seek for purchase companies exhibiting
four distinct characteristics.  First, they will be financially strong, often
with substantial liquidity and no debt.  Second, they will be trading at
material discounts to our estimate of intrinsic value with meaningful stock
price support to reduce downside risk.  Third, they will have good secular
growth prospects and be well-positioned within growing industries.  Finally,
the Value Discovery Fund will identify investments with catalysts that can
result in earnings acceleration through faster growth or improving
profitability.
        We are proud to be a part of the William Blair Mutual Funds family, and
we welcome your investment.

Glen Kleczka                      Cappy Price             David Mitchell



                                       10
<PAGE>   98
 
          VALUE DISCOVERY FUND * WILLIAM BLAIR MUTUAL GROWTH FUND LOGO
 
                            PORTFOLIO OF INVESTMENTS
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<S>                                                           <C>
CASH AND OTHER ASSETS, LESS LIABILITIES                       $2,175
                                                              ------
NET ASSETS -- 100.0%                                          $2,175
                                                              ======
</TABLE>
 
                See accompanying Notes to Financial Statements.
 
                                       11
<PAGE>   99
 
INTERNATIONAL GROWTH FUND - WILLIAM BLAIR MUTUAL FUNDS, INC.

<TABLE>
<CAPTION>
- --------------------------------------Performance Highlights----------------------------------------
 
                                                        1996         1995         1994         1993
<S>                                                     <C>          <C>          <C>          <C>
 International Growth Fund                              10.2%         7.2%        (0.0)%       33.6%
  Lipper International                                  14.4         10.0         (0.7)        39.2
  MSCI AC WLD ex US Index*                               6.7          9.9          6.6         34.9
- ----------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
- ----------------------------------------Investor Information----------------------------------------
 
                                                        1996         1995         1994         1993
<S>                                                     <C>          <C>          <C>          <C>
 Ending Net Assets (in millions)                        $105          $90          $70          $40
 Portfolio Turnover Rate (%)                              89           77           40           83
 Expense Ratio (%)                                      1.44         1.48         1.51         1.71
- ----------------------------------------------------------------------------------------------------
</TABLE>

* Morgan Stanley Capital International All Country World Free except U.S. Index


A LETTER FROM THE       Dear Shareholders:
PORTFOLIO MANAGER       The year 1996 brought in a bumper crop of good economic
                        and political news.
[GEORGE GREIG PHOTO]       - Economic growth, while improving from 1995's
                             sluggish pace, remained moderate. Only two major
                             economies--Australia and Japan--grew at a rate
                             above 3%; only Italy and Switzerland fell below 1%
                             growth.
                           - Inflation trended below its long term average level
                             in every major economy worldwide, and fell below 4%
                             in every European country with the exception of
                             Greece. By the end of 1996, even China and Brazil
                             had experienced single-digit inflation. In spite of
                             generally improving economic growth, interest rates
                             fell everywhere except in the UK and the US.
                           - Central bankers achieved their collective goal of
                             steadily strengthening the dollar without causing
                             undue market volatility.
                           - Elections in the US and Japan came off exactly as
                             forecast: opinion polls in Britain remained
                             unchanged all year long; even the Prodi government
                             in Italy was viewed as stable. Something like a
                             political consensus for the European monetary union
                             and its fiscal preconditions seemed to be in place
                             by year-end. No significant new trade disputes
                             arose anywhere.
                           - Among the 25 emerging marker economies we follow,
                             none suffered a decline in real GDP during 1996,
                             none underwent an involuntary change in government,
                             only one experienced a significant real
                             devaluation, and all but three showed rising
                             foreign exchange reserves.     

If this seems like the ideal environment for financial markets, it was.
Twenty-percent or better market returns were commonplace in Europe, developed
Asia, and many emerging markets. The exceptions were few but significant: South
Africa, Chile, and Thailand all fell by more than 15% in dollar terms, as did
Japan, where investor confidence seemed to erode as they year wore on. We
continue to believe in corporate performance as the key driver of international
equity investment decision in 1997 and beyond. For many years, returns on
capital and returns to shareholders have been downplayed or ignored in Europe
and Japan. We believe that over the next several years these same criteria,
which have dominated the U.S. market, will begin to rise to the top of the
corporate agenda abroad.
        
     As you know, we implemented a management change within the fund during
1996, creating an in-house research and portfolio team to take charge of the
fund's day-to-day 
                                                                (continued)



 
                                       12
<PAGE>   100
 
         INTERNATIONAL GROWTH FUND - WILLIAM BLAIR MUTUAL FUNDS, INC.
 
 
management.  The team is now in place, and the composition of the portfolio has
been changed to reflect a strengthened commitment to both above-average
fundamental characteristics and the long-term quality growth approach for which
William Blair is known.
    The International Growth Fund will now be compared to the new Morgan
Stanley All County World Free except the U.S. Index.  Unlike the Morgan Stanley
Europe-Australia-Far East Index, this new benchmark includes emerging markets
and reduces the Japanese portion to approximately 30%, making it more
comparable to our fund in terms of investment approach.





George Greig

 
                                       13
<PAGE>   101
 
          INTERNATIONAL GROWTH FUND-WILLIAM BLAIR MUTUAL FUNDS, INC.

               ILLUSTRATION OF AN ASSUMED INVESTMENT OF $10,000
     WITH REINVESTMENT OF CAPITAL GAIN DISTRIBUTIONS AND INCOME DIVIDENDS


                                   [GRAPH]

<TABLE>
<CAPTION>
                     10/92      12/92      6/93       12/93      6/94     12/94      6/95     12/95      6/96      12/96
<S>                  <C>        <C>        <C>        <C>        <C>      <C>        <C>      <C>        <C>       <C>
Int'l Growth Fund   $10,000    10,130     11,390      13,534     13,985   13,528     13,332   14,505     15,687    15,687
MSCI All Country    $10,000     9,694     11,885      13,078     13,960   13,945     14,269   15,331     16,148    16,355
World Free Ex-U.S.*
Lipper Inter-       $10,000     9,876     11,311      13,745     13,717   13,644     13,983   15,012     16,316    17,178
national Index
MSCI EAFE**         $10,000     9,623     11,879      12,793     13,935   13,825     14,206   15,422     16,142    16,403
</TABLE>

*   MORGAN STANLEY CAPITAL INTERNATIONAL ALL COUNTRY WORLD FREE EXCEPT U.S. 
    INDEX
**  MORGAN STANLEY EUROPE-AUSTRALIA-FAR EAST INDEX






                                       14


<PAGE>   102
 
            INTERNATIONAL GROWTH FUND - BLAIR MUTUAL INTERNATIONAL
 
                            PORTFOLIO OF INVESTMENTS
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
   Shares                                          Value
   ------                                          -----
<C>      <C>  <S>                                 <C>
COMMON STOCKS -- EUROPE 43.6%
AUSTRIA -- 1.5%
    10        VA Technologie AG (Industrial
                engineering)                      $  1,570
                                                  --------
DENMARK -- 1.3%
     7        Novo Nordisk AS (Pharmaceutical)       1,318
                                                  --------
FINLAND -- 2.3%
    19        Nokia (AB) OY
                (Telecommunications equipment)       1,103
     9        Raision Tehtaat OY (Food)                535
     9        TT Tieto OY, "B" Shares
                (Consultants)                          746
                                                  --------
                                                     2,384
                                                  --------
FRANCE -- 5.6%
     6        Canal Plus (Media/television)          1,369
    38        Lagardere Groupe (Industrial
                holding company)                     1,043
    10        Louis Dreyfus Citrus (Food
                processing)                            328
    29    *   SGS Thomson Microelectronics
                (Semiconductors)                     2,051
     2        Sodexho (Contract catering)            1,114
                                                  --------
                                                     5,905
                                                  --------
GERMANY -- 5.6%
     1        Altana Industrie -- Aktiem Und
                Anlagen DM50 (Pharmaceuticals)         739
    11        Adidas AG ORD (Sporting goods)           950
    15    *   Leica Camera AG (Cameras)                468
     3    *   Mannesmann AG (General
                engineering)                         1,083
     8        Moebel Walther (Furniture
                stores)                                442
     9        SGL Carbon AG (Chemicals)              1,134
    18        Veba AG (Utility)                      1,040
                                                  --------
                                                     5,856
                                                  --------
ITALY -- 2.0%
   502        Banca Fideuram SPA (Fund
                management)                          1,102
   400        Telecom Italia Mobile (Cellular
                service)                             1,013
                                                  --------
                                                     2,115
                                                  --------
NETHERLANDS -- 3.1%
    20        ABN AMRO Holdings (Banks)              1,301
    26        Philips Electronics NV (Consumer
                electronics)                         1,053
    20        Van Ommeren (Specialty
                chemicals)                             903
                                                  --------
                                                     3,257
                                                  --------

   Shares                                          Value
   ------                                          -----
<C>      <C>  <S>                                 <C>
NORWAY -- 1.7%
    58    *   Tandberg (Digital television
                systems)                          $  1,811
                                                  --------
SWEDEN -- 5.7%
    28        Autoliv AB (Airbag
                manufacturers)                       1,224
    45        Astra AB (Pharmaceuticals)             2,217
    50        Ericsson AB Telecom
                (Telecommunication services)         1,542
    22        Kinnevik AB "B" Free Shares
                (Industrial holding company)           618
    22        Netcom Systems AB "B" Shares
                (Telecommunications)                   363
                                                  --------
                                                     5,964
                                                  --------
SWITZERLAND -- 1.8%
  0.43        Baloise Holdings (Insurance)             853
    10        CS Holdings (Banking)                  1,026
                                                  --------
                                                     1,879
                                                  --------
UNITED KINGDOM -- 13.0%
    40        Abbott Mead Vickers PLC
                (Advertising agency)                   442
    75        Cairn Energy (Energy utility)            538
    50        DFS Furniture Company (Furniture
                manufacturer/retailer)                 514
   125        First Leisure Corporation PLC
                (Entertainment)                        721
   250        Firstbus PLC (Transportation
                services)                              871
    70        Games Workshop (Toys)                    647
   135        Grand Metropolitan PLC
                (Breweries)                          1,064
   100        Harvey Nichols Group PLC
                (Department stores)                    596
   240        Hays PLC (Bulk
                distribution/personnel
                services)                            2,310
   200        Kwik Fit Holdings ORD PLC
                (Distributors)                         745
    60        Mercury Assets Management Group
                (Banks/Merchant)                     1,278
   125        Next PLC (Retail apparel)              1,215
    60        Page (Michael) Group PLC
                (Recruitment)                          426
    50        Rolls Royce PLC (Engineering)            220
    65        Standard Chartered PLC (Retail
                banks)                                 803
   126        Tesco PLC (Food Retailer)                768
    25        Wetherspoon (J.D.) PLC (Retail
                pubs)                                  505
                                                  --------
                                                    13,663
                                                  --------
COMMON STOCKS -- ASIA -- 36.7%
AUSTRALIA -- .6%
   125        QBE Insurance Group Limited
                (General insurer)                      659
                                                  --------
</TABLE>
 
                                      15
<PAGE>   103
 
<TABLE>
<CAPTION>

   Shares                                          Value
   ------                                          -----
<S>         <C>                                 <C>          
HONG KONG -- 6.4%
 2,200        Cafe de Coral Holdings, Limited
                (Fast food)                       $    590
 2,200    *   Founder Hong Kong, Limited
                (Electronic publishing)                846
 1,000    *   Glorious Sun Enterprises,
                Limited (Textile products)             417
   600    *   Guang Nan Holdings, Limited
                (Miscellaneous distribution)           516
    84        HSBC Holdings (Bank)                   1,802
   250    *   New World Infrastructure
                (Construction)                         730
   200        Shanghai Industrial Holdings,
                Limited (Tobacco/
                pharmaceutical holdings)               729
   185        Television Broadcasts, Limited
                (Broadcasting)                         739
 1,550        Tingyi (Cayman Island) Holdings
                (Food manufacturing)                   406
                                                  --------
                                                     6,775
                                                  --------
JAPAN -- 26.9%
    25        Aderans Company, Limited (Wigs)          611
    77        Anritsu Corporation (Electrical
                machinery)                             831
    95        Canon, Incorporated (Computer
                and office equipment)                2,099
    16        Chodai Company, Limited
                (Consulting services)                  404
    44        Credit Saison (Credit cards)             984
  0.20        DDI Corporation (Telecom service
                provider)                            1,322
    25        Enix Corporation (Entertainment
                software)                              563
    15        Fuji Machine Manufacturing
                (Automated assembly machine)           397
    21        Giken Seisakusho Company,
                Limited (Machinery)                    281
    17        Hirose Electronics Company,
                Limited (Connectors)                   985
    30        Hoya Corporation (Specialty
                glass)                               1,178
     6        Imagineer Company, Limited (Game
                software)                              363
    60        Jaccs Company (Consumer finance)         466
     7        Keyence Corporation
                (Electronics)                          864
    20        Meiwa Estate Corporation,
                Limited (Condominiums)                 501
   120        Minebea Company, Limited
                (Miniature bearings)                 1,003
    16        Nichiei Company, Limited
                (Finance company)                    1,181
    10        Nichii Gakkan Company (Medical
                recordkeeping)                         499
    15        Noritsu Kohki Company, Limited
                (Photo processing equipment)           706
    21        Oiles Corporation (Machinery)            638
 
<CAPTION>

 
   Shares                                          Value
- ------------                 JAPAN (CONTINUED)    --------
<S>         <C>                                 <C>          
    87        Ricoh Corporation, Limited
                (Color copier manufacturer)       $    999
    20        Rohm Company (Electronics)             1,314
    15        Ryohin Keikaku Company, Limited
                (Home furnishing/
                apparel stores)                      1,114
    10        SMC Corporation (Machinery)              672
    10        Sakai Moving Service
                (Residential moving)                   251
    36        Santen Pharmaceutical Company
                (Opthalmic pharmaceuticals)            746
    14        Secom Company, Limited
                (Services)                             847
    23        Sho Bond Construction
                Corporation (Construction)             630
    51        Sodick Company, Limited
                (Electronics)                          423
    41        Sony Corporation (Consumer
                electronics)                         2,686
    95        Takeda Chemical Industries,
                Limited (Pharmaceuticals)            1,993
     6        Tiemco Company, Limited (Sport
                fishing equipment)                     384
     9        World Company, Limited
                (Wholesale apparel)                    373
                                                  --------
                                                    28,308
                                                  --------
MALAYSIA -- 2.0%
    90        Commerce Asset Holdings Berhad
                (Retail bank)                          677
   120        Malaysia Assurance Alliance
                (Insurance)                            585
   158        YTL Corporation Berhad (Holding
                company/power generation)              848
                                                  --------
                                                     2,110
                                                  --------
SINGAPORE -- .8%
    95        City Developments (Real estate)          855
                                                  --------
COMMON STOCKS -- EMERGING MARKETS -- 14.9%
ARGENTINA -- .6%
    22        Banco Frances Rio Plata ADR
                (Bank)                                 606
                                                  --------
BRAZIL -- 3.4%
30,000        Lojas Arapua PN (Retail)                 554
16,000        Telebras S.A.
                (Telecommunications)                 1,147
     8        Telecommunicacoes Brasilera, ADR
                (Telecommunications)                   612
 3,200        Telecommunicacoes de Sao Paolo
                (Telecommunications)                   693
17,230        Uniao de Bancos Brasilera (Bank)         562
                                                  --------
                                                     3,568
                                                  --------
CHILE -- .9%
    17        Laboratorio Chile S.A. (Generic
                drugs)                                 280
     6        Quimica Y Minera Chile ADR
                (Mining)                               313
    19        Santa Isabel S.A. GDR (Food
                retailer)                              428
                                                  --------
                                                     1,021
                                                  --------
</TABLE>
 
                                       16
<PAGE>   104
 
 
<TABLE>
<CAPTION>

   Shares                                          Value
- ------------                 CHILE (CONTINUED)    --------
<S>           <C>                                <C>
CHINA -- .6%
   751    *   Huangshan Tourism Development
                Co. (Tourism)                     $    331
   300    *   Wuxi Little Swan (Appliance
                manufacturing)                         303
                                                  --------
                                                       634
                                                  --------
GREECE -- .4%
    13        Goody S.A. (Retail restaurants)          224
    20        Sarantis (Cosmetics)                     216
                                                  --------
                                                       440
                                                  --------
HUNGARY -- .6%
     6        Gedeon Richter RT
                (Pharmaceuticals)                      351
     8        Pannonplast Plastic Industries
                (Plastic pipe manufacturing)           294
                                                  --------
                                                       645
                                                  --------
INDIA -- .4%
    50        Gujarat Ambuja Cements (Building
                products)                              413
                                                  --------
INDONESIA -- 1.3%
   150        PT Ramayana Lestari Sentosa
                (Retail department store)              324
   650        PT Telecomunikasion
                (Telecommunications)                 1,087
                                                  --------
                                                     1,411
                                                  --------
ISRAEL -- .4%
    24        Koor Industries, Limited
                (Fertilizer)                           411
                                                  --------
KOREA -- 1.6%
    49        Korea Electric Power Corporation
                ADR (Electric utility)               1,015
     6        Samsung Display Devices, Limited
                (Electronic displays)                  330
     2        Sungmi Telecom Company
                (Telecommunication equipment)          298
                                                  --------
                                                     1,643
                                                  --------
PERU -- 1.2%
    17        Corporation Banco Credito del
                Peru (Bank)                            306
   505        Telefonica Del Peru S.A. CPT "B"
                Shares (Telephone company)             940
                                                  --------
                                                     1,246
                                                  --------
<CAPTION>
<S>           <C>                                <C>
PHILIPPINES -- .8%
 1,000        C & P Homes (Housing
                development)                      $    513
 1,250        Davao Union Cement Corporation,
                Class "B" (Cement)                     352
                                                  --------
                                                       865
                                                  --------
POLAND -- .6%
   12         Agros Holdings, Class "C" (Food)         315
   34         Electrim S.A. (Telecommunication
                wire manufacturing)                    308
                                                  --------
                                                       623
                                                  --------
SOUTH AFRICA -- 1.3%
   30         Liberty Life Association of
                Africa (Life/health insurance)         752
  100         Metropolitan Cash & Carry,
                Limited (Food retail)                  331
   30         Nasionale Pers Beperk
                (Publishing)                           277
                                                  --------
                                                     1,360
                                                  --------
THAILAND -- .5%
  200  (a)    Industrial Finance Corporation
                of Thailand (Bank)                     534
   54         Thai Farmers Bank Warrants
                (Bank)                                  --
                                                  --------
                                                       534
                                                  --------
TURKEY -- .3%
 2,000        Ardem Pisirici (Stove
                manufacturing)                         296
                                                  --------
TOTAL COMMON STOCKS 95.2%
              (COST $86,980)                       100,145
                                                  --------
SHORT-TERM INVESTMENTS -- 4.3%
 $4,485   Investors Bank & Trust Company
            Repurchase Agreement,
            5.91% ,dated 12/31/96
            Collateralized by U.S.
            Government Agency Security
            with market value of $4,710
            with 1/2/97 repurchase date
            (cost $4,485)                            4,485
                                                  --------
          TOTAL INVESTMENTS -- 99.5%               104,630
          (cost $91,465)
          OTHER ASSETS, LESS
            LIABILITIES -- .5%                         518
                                                  --------
          NET ASSETS -- 100.0%                    $105,148
                                                  ========
</TABLE>
 
- ---------------
 
 *  Non-income producing securities
 
ADR = American Depository Receipt
 
GDR = Global Depository Receipt
 
(a) Foreign registered securities (Alien Market)
 
At December 31, 1996, the Fund's Portfolio of Investments includes the following
categories: Technology -- 22%; Services -- 18%; Finance -- 17%; Manufacturing --
12%; Consumer Goods -- 9%; Utilities -- 8%; Retail -- 7%; Processing -- 3%;
Transportation -- 2%; and Other -- 2%
 
                See accompanying Notes to Financial Statements.
 
                                       17
<PAGE>   105
INCOME FUND-WILLIAM BLAIR MUTUAL FUNDS, INC. 
 
                             Performance Highlights
 
<TABLE>
<CAPTION>
                                                1996       1995       1994       1993       1992
<S>                                             <C>        <C>        <C>        <C>        <C>
 Income Fund                                    3.0%       14.4%      (0.7)%     7.8%       7.2%
  Lehman Intermediate Govt./Corp. Index         4.1        15.3       (1.9)      8.8        7.2
</TABLE>
 
 
                              Investor Information
 
<TABLE>
<CAPTION>
                                             1996       1995       1994       1993       1992
<S>                                          <C>        <C>        <C>        <C>        <C>
 Ending Net Assets (in millions)             $150       $147       $144       $204       $137
 Portfolio Turnover Rate (%)                   66         54         63        114         47
 Expense Ratio (%)                            .70        .68        .68        .70        .88
 
</TABLE> 

A LETTER FROM THE PORTFOLIO MANAGER

[BENTLEY MYER PHOTO]

Dear Shareholders:

        The big story in the bond market for the second half of 1996 was the
slowdown in the economy during the third quarter.  Real Gross Domestic Product
grew at a very robust rate of 4.7% during the second quarter, but slipped to
just 2.1% during the third quarter.  Early reports for the fourth quarter
suggest that the growth rate picked up, but not in any significant way.

        The bond market tracked these changes very closely with prices rising
strongly in the third quarter, only to reverse course later in the fourth
quarter.  Looking ahead, it appears that the economy will continue to grow at a
moderate rate into the first half of 1997.  There do not appear to be many
excesses that would lead the Federal Reserve Board to change their more neutral
policy and start raising short-term interest rates.  One exception is the
continuing upward movement in stock prices; a large correction could dampen
consumer confidence.

        Our strategy continued to run counter to market sentiment as we
started raising cash reserves during the third quarter rally.  This move hurt
our relative performance early on, but we have benefitted more recently as
interest rates moved back up.  U.S. Treasury notes and more conservative
mortgage-backed securities continue to be our preferred sector choices.  This
again runs against popular thinking which favors corporate bonds.  We continue
to have concerns in the corporate sector, as the risk and return
characteristics for most issues do not look attractive.

        Finally, in November we raised the monthly dividend from $.05 per share
to $.0525.  We waited until later in the year to raise this rate because we
wanted to make sure we could sustain the increased payment for some period of
time.  This more conservative approach will continue to be our policy in 1997
and beyond.

                                       
Bentley Myer








                                       18
<PAGE>   106
 
INCOME FUND - WILLIAM BLAIR MUTUAL FUNDS, INC.
 
                ILLUSTRATION OF AN ASSUMED INVESTMENT OF $10,000
      WITH REINVESTMENT OF CAPITAL GAIN DISTRIBUTIONS AND INCOME DIVIDENDS
 
<TABLE>
<CAPTION>
                                                            LEHMAN IN-
                                                            TERMEDIATE
                                                             GOVERN-
 MEASUREMENT PERIOD                       INCOME       MENT/CORPORATE
(FISCAL YEAR COVERED)                      FUND             INDEX
- ---------------------                     ------       ----------------
<S>                                         <C>              <C>
   9/90                                    10,000           10,000
   12/90                                   10,291           10,490
   6/91                                    10,781           10,946
   12/91                                   11,966           12,024
   6/92                                    12,390           12,387
   12/92                                   12,845           12,887
   6/93                                    13,565           13,687
   12/93                                   13,849           13,955
   6/94                                    13,555           13,652
   12/94                                   13,746           13,748
   6/95                                    14,935           15,069
   12/95                                   15,722           15,857
   6/96                                    15,670           15,823
   12/96                                   16,189           16,498
</TABLE>
 
                                       19
<PAGE>   107
 
INCOME FUND WILLIAM BLAIR MUTUAL FUNDS, INC.
 
                            PORTFOLIO OF INVESTMENTS
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
Principal
 Amount                Issue                          Value
- ---------              -----                         --------
<C>         <S>                                     <C>
U.S. GOVERNMENT AND U.S. GOVERNMENT AGENCY GUARANTEED
OBLIGATIONS -- 65.0%

U.S. TREASURY NOTES -- 30.3%
 $ 10,322   5.750%, due 8/15/03                      $ 10,019
   15,500   7.250%, due 5/15/04                        16,324
    5,000   7.250%, due 8/15/04                         5,267
   12,650   7.875%, due 11/15/04                       13,816
 --------                                            --------
   43,472   Total U.S. Treasury Obligations            45,426
 --------                                            --------
U.S. GOVERNMENT GUARANTEED OBLIGATIONS -- 9.1%
U.S. DEPARTMENT OF VETERANS
AFFAIRS -- 3.3%
    5,000   Mortgage Trust 1992-2,                      5,019
 --------     Tranche 2-D, 7.000%, due               --------
              9/15/15
FEDERAL HOUSING AUTHORITY -- 2.9%
    4,120   9.680%, due 3/1/25                          4,282
 --------                                            --------
SMALL BUSINESS ADMINISTRATION -- 1.2%
       --   Receipt for Multiple
              Originator Fees, #3
              0.785%, due 11/8/08                       1,503
              (Interest Only) WAC
      339   Loan #100023, 9.375%, due                     352
 --------     11/25/14                               --------
      339   Total Small Business                        1,855
 --------     Administration                         --------
              Obligations
GOVERNMENT NATIONAL MORTGAGE
  ASSOCIATION II -- 1.0%
                                
       20   12.000%, due 2/20/00                           21 
       21   12.500%, due 2/20/15                           24
      659   11.000%, due 3/20/16                          738
       17   10.500%, due 6/20/19                           18
      440   11.000%, due 8/20/19                          492
       69   10.500%, due 8/20/20                           75
       87   10.500%, due 9/20/20                           95
 --------                                            --------
    1,313   Total Government National                   1,463
 --------     Mortgage Association                   --------
              Obligations II
GOVERNMENT NATIONAL MORTGAGE
  ASSOCIATION -- 0.7%
                                
       11   12.500%, due 4/15/14                           12
       54   13.000%, due 11/15/14                          60
      909    8.500%, due 12/15/21                         953
 --------                                            --------
      974   Total Government National                   1,025
 --------     Mortgage Association                   --------
              Obligations
<CAPTION>
Principal
 Amount                Issue                          Value
- ---------              -----                         --------
<C>        <S>                                      <C>
 
GOVERNMENT NATIONAL MORTGAGE
  ASSOCIATION MOBILE HOME -- 0.0%
 $     35   9.750%, due 3/15/98                      $     36
       17   9.750%, due 1/15/99                            18
 --------                                            --------
       52   Total Government National                      54
 --------     Mortgage Association                   --------
              Mobile Home Obligations
U.S. GOVERNMENT AGENCY GUARANTEED
  OBLIGATIONS -- 25.6%
FEDERAL NATIONAL MORTGAGE
  ASSOCIATION (FNMA) -- 10.6%
      746   1991-79, Tranche S, 16.596%            
              FR, due 7/25/98                             799 
    1,123   8.500%, due 7/1/99                          1,145
      567   11.250%, due 12/15/11                         624
      569   12.250%, due 12/15/11                         641
       53   13.250%, due 8/1/14                            53           
    2,640   1992-200, Tranche SE,                    
              11.500%, due 11/25/22                     2,653
      266   1993-19, Tranche SH,                   
              11.234%, due 4/25/23                        259 
    4,842   5.724% FR, due 9/1/26                       4,949   
    4,701   5.900% FR, due 10/1/26                      4,801
 --------                                             --------
   15,507   Total FNMA Mortgage                        15,924
 --------     Obligations                            --------
FEDERAL HOME LOAN MORTGAGE
  CORP. (FHLMC) -- 8.7%
      403   #1475, Tranche SC, 9.457%                     386
              FR, due 2/15/08
    1,092   #1693, Tranche S+, 5.725%,                    893
              due 9/15/08
      166   #1214, Tranche EB, 9.900%                     166
              FR, due 2/15/15
    3,445   #555280, Pass Through,                      3,579
              8.500% , due 9/1/17
    2,000   #1289, Tranche PK, 7.500%,                  2,019
              due 5/15/18
    3,390   #1166, Tranche PG, 8.000%,                  3,439
              due 2/15/20
      603   #1492, Tranche SE, 10.133%,                   529
              due 3/15/23
    2,017   #1542, Tranche S, 14.346%,                  2,060
 --------     due 7/15/23                            --------
   13,116   Total FHLMC Mortgage                       13,071
 --------     Obligations                            --------
</TABLE>
 
                                       20
<PAGE>   108
 
<TABLE>
<CAPTION>

Principal                                   S & P
 Amount                Issue               Rating       Value
- ---------              -----             -----------   --------
                                         (Unaudited)
<S>                 <C>              <C>             <C>
FEDERAL HOME LOAN BANKS
  (FHLB) -- 6.3%
    4,000   #AI-03, Tranche 1, 6.953%,
              due 4/25/03                              $  4,005
    5,500   #BJ-03, Tranche 1, 6.750%,                    5,503
 --------     due 10/24/03                             --------
    9,500   Total FHLB Mortgage Obli-                     9,508
 --------     gations                                  --------
 $ 93,393   Total U.S. Government and                    97,627
 --------     U.S. Government Agency                   --------
              Guaranteed Obligations
COLLATERALIZED MORTGAGE
  OBLIGATIONS -- 20.3%
    3,256   Prudential Home Mortgage
              Securities Corp.,
              1992-45, Tranche A-8,           AAA         3,158
              6.370% FR, due 1/25/00
    1,418   Polk Co. HFA, 1991-1,
              Tranche A-2, 9.550%, due        AAA         1,471
              1/15/11
   12,452   Morgan Keegan Funding I,          AA-        12,701
              L.P., 8.000%, due 4/25/11
      416   Mortgage Obligation Struc-
              tured Trust, 1993-1,
              Tranche A-1, 6.350%, due        AAA           414
              10/25/18
    5,385   Citicorp, 1993-2, Tranche         AAA         5,430
              A-4, 7.500%, due 7/25/21
    5,000   Prudential Home Mortgage
              Securities Corp., 1993-8,
              Tranche A-10, 7.350%, due       AAA         5,023
              3/25/23
      174   Residential Finance Corp.,
              1991-11, Tranche A-2,            AA           175
              10.000%, due 4/01/21
      944   Residential Trust Corp.,
              1992-2, Tranche A,               AA           958
              7.943%, due 8/25/21
      212   Resolution Trust Corp.,
              1991-3, Tranche A-2,            AAA           224
              10.372%, due 8/25/21
      862   Resolution Trust Corp.,
 --------     1992-5, Tranche 5-C,
              8.621%, due 1/25/26                           886
                                               AA      --------
   30,119   Total Collateralized Mort-                   30,440
 --------     gage Obligations                         --------
 
<CAPTION>

Principal                                   S & P
 Amount                Issue               Rating       Value
- ---------              -----             -----------   --------
                                         (Unaudited)
<S>                 <C>              <C>             <C>
CORPORATE OBLIGATIONS -- 2.1%
 $  1,250   Sears, Roebuck Corp. Me-
              dium Term Note, 9.75%,
              due 3/21/00                      A-      $  1,374
    1,500   Household Finance Corp.
 --------     Medium Term Note, 10.38%,
              due 12/15/00                                1,705
                                                A      --------
    2,750   Total Corporate Obligations                   3,079
 --------                                              --------
  126,262   TOTAL LONG-TERM IN-                         131,146
 --------     VESTMENTS -- 87.4%                       --------
            (cost $130,611)
SHORT-TERM INVESTMENTS -- 11.5%
    1,456   Associates Corp. of North
              America Demand Note,                        1,456
              5.233%, due 1/1/97             A-1+
    3,250   Sears Commercial Paper,                       3,250
              5.408%, due 1/13/97             A-2
    4,000   General Motors Acceptance
              Corp., 5.300%, due                          4,000
              1/16/97                         A-2
    1,750   Sears Commercial Paper,                       1,750
              5.551%, due 1/23/97             A-2
    2,500   Sears Commercial Paper,                       2,500
              5.452%, due 1/24/97             A-2
    1,750   Ford Motor Credit Company,                    1,750
              5.300%, due 2/7/97              A-1
    2,500   General Motors Acceptance
 --------     Corp., 5.300%, due 3/3/97                   2,500
                                              A-2      --------
   17,206   TOTAL SHORT-TERM IN-
 --------     VESTMENTS -- 11.5%                         17,206
                                                       --------
            (cost $17,206)
 $143,468   TOTAL INVESTMENTS -- 98.9%
 ========                                               148,352
            (cost $147,817)
            OTHER ASSETS, LESS
              LIABILITIES -- 1.1%                         1,654
                                                       --------
            NET ASSETS -- 100.0%                       $150,006
                                                       ========
</TABLE>
 
- ---------------
WAC = Weighted Average Coupon
FR = Floating Rate
 
                See accompanying Notes to Financial Statements.
 
                                       21
<PAGE>   109
 
                    Blair Mutual Ready Reserves Fund Logo
 
                             Performance Highlights
 
<TABLE>
<CAPTION>
                                                1996       1995       1994       1993       1992
<S>                                             <C>        <C>        <C>        <C>        <C>
 Ready Reserves Fund                            4.8%       5.5%       3.7%       2.6%       3.3%
  S&P-rated AAA Money Market Funds              4.8        5.4        3.6        2.0        3.2
</TABLE>
 
                              Investor Information
 
<TABLE>
<CAPTION>
                                                     1996       1995       1994       1993       1992
<S>                                                  <C>        <C>        <C>        <C>        <C>
 Ending Net Assets (in millions)                     $761       $704       $521       $477       $449

 Expense Ratio (%)                                   .71        .72        .71        .71         .71
</TABLE>
 

A LETTER FROM THE PORTFOLIO MANAGER

[BENTLEY MYER PHOTO]

Dear Shareholders:

        The sentiment regarding changes in Federal Reserve Board policy swung
over a fairly wide range during the second half of 1996. Short-term interest
rates were expected to be increased early in the he period in response to signs
that the economy was expanding at a very rapid rate. As subsequent signs emerged
indicating a slowing in the growth rate of the economy, expectations changed to
an actual lowering in short rates. When the dust had settled at year end, the
federal funds rate stood at 5.25%, or exactly where it began the period. The
current forecast is for a continuation at this level, but, with the increased
amount of speculation in the money markets, there will probably be a change in
sentiment in the very near future.
        With the fairly narrow spread between shorter-and longer-maturity money
market rates, we have allowed our average maturity to drift down to a current
level of 37 days. This is at the lower end of our normal maturity range of 35 to
60 days. We are likely to maintain this average until we feel that we are
adequately compensated for extending our maturities. From a sector standpoint,
we sold some floating rate notes and reinvested the proceeds in highly rated,
fixed rate commercial paper. With Federal Reserve Board policy unlikely to
change in the near term, we felt more comfortable with a fixed rate option.
Assets continued to grow and have reached the $750 million level recently.
        We look forward to serving your money market needs in 1997.
 

Bentley M. Myer

                                       22
<PAGE>   110
 
            READY RESERVES FUND - WILLIAM BLAIR MUTUAL FUNDS, INC.
 
                            PORTFOLIO OF INVESTMENTS
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<S>           <C>            <C>        <C>        <C>
U.S. GOVERNMENT AGENCY GUARANTEED -- 2.2%
$  2,200    Agency for
            International
            Development
            VRN -- Peru           5.778%     1/1/97   $  2,200
     366    Agency for
            International
            Development
            VRN -- Zimbabwe       5.778%     1/1/97        366
   9,000    Student Loan
            Marketing
            Association VRN       5.645%     1/1/97      9,000
   5,000    Student Loan
            Marketing
            Association VRN       5.545%     1/1/97      5,000
- --------                                              --------
  16,566                                                16,566
- --------                                              --------
DEMAND NOTE-- 0.0%
     103    Associates
            Corporation of
            North America
            Demand Note VRN       5.233%     1/2/97        103
                                                      --------
FIXED RATE NOTES -- 0.3%
   2,000
- --------
            National Rural
            Utilities
            Cooperative
            Finance
            Corporation           8.160%    1/15/97      2,002
                                                      --------
COMMERCIAL PAPER -- 96.6%
INSURANCE -- 20.6%
   8,000
            A. I. Credit
            Corporation           5.280%    2/14/97      7,948
   2,858
            American General
            Finance
            Corporation           5.310%    1/22/97      2,849
   6,500
            American General
            Finance
            Corporation           5.300%    1/30/97      6,472
   1,707
            American General
            Finance
            Corporation           5.320%    1/30/97      1,700
   8,117
            American General
            Finance
            Corporation           5.370%     4/4/97      8,004
   6,000
            Aon Corporation       5.300%    1/21/97      5,982
   2,254
            Metlife Funding
            Incorporated          5.300%    1/23/97      2,247
 
<CAPTION>

Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<S>           <C>            <C>        <C>        <C>
$  3,483    Metlife Funding
            Incorporated          5.300%    1/23/97   $  3,472
  10,673    Metlife Funding
            Incorporated          5.290%    2/12/97     10,607
   7,000    Metlife Funding
            Incorporated          5.280%    2/13/97      6,956
   3,300    Metlife Funding
            Incorporated          5.330%    2/13/97      3,279
   3,846    Metlife Funding
            Incorporated          5.300%     3/6/97      3,810
   7,350    Metlife Funding
            Incorporated          5.300%    3/13/97      7,273
  10,643    Prudential Funding
            Corporation           5.520%    1/14/97     10,622
   6,640    Prudential Funding
            Corporation           5.320%    1/24/97      6,617
   7,263    Prudential Funding
            Corporation           5.330%     2/6/97      7,224
   8,000    Prudential Funding
            Corporation           5.410%    2/19/97      7,941
   5,000    SAFECO Credit
            Corporation           5.380%     1/3/97      4,999
   3,500    SAFECO Credit
            Corporation           5.320%     2/4/97      3,482
   6,500    SAFECO Credit
            Corporation           5.280%     2/6/97      6,466
   3,000    SAFECO Credit
            Corporation           5.280%     2/7/97      2,984
   2,577    USAA Capital
            Corporation           5.470%     1/2/97      2,577
   2,740    USAA Capital
            Corporation           5.410%    1/13/97      2,735
  10,000    USAA Capital
            Corporation           5.450%    1/16/97      9,977
   5,118    USAA Capital
            Corporation           5.290%    1/24/97      5,101
   8,000    USAA Capital
            Corporation           5.300%    2/13/97      7,949
   3,115    USAA Capital
            Corporation           5.300%    2/27/97      3,089
   5,000    USAA Capital
            Corporation           5.300%    3/17/97      4,945
- --------                                              --------
 158,184                                               157,307
- --------                                              --------
</TABLE>
 
                                       23
<PAGE>   111
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<C>         <S>                 <C>        <C>        <C>
FINANCE -- 20.2%
$  3,745    Associates
            Corporation of
            North America         5.310%    1/27/97   $  3,731
   6,436    Associates
            Corporation of
            North America         5.310%    1/28/97      6,410
   6,974    Associates
            Corporation of
            North America         5.320%    1/31/97      6,943
   3,000    Associates
            Corporation of
            North America         5.390%     2/4/97      2,985
   4,431    Associates
            Corporation of
            North America         5.300%    3/11/97      4,386
   3,608    Associates
            Corporation of
            North America         5.370%    3/18/97      3,567
   4,500    Associates First
            Capital
            Corporation           5.310%    2/11/97      4,473
   5,414    Avco Financial
            Services
            Incorporated          5.470%    1/15/97      5,402
  10,116    Beneficial
            Corporation           5.380%     2/5/97     10,063
   6,865    Beneficial
            Corporation           5.320%    2/10/97      6,824
   6,000    Block Financial
            Corporation           5.350%    1/27/97      5,977
   5,725    Block Financial
            Corporation           5.350%    3/12/97      5,665
   4,751    Block Financial
            Corporation           5.330%    3/14/97      4,700
   4,909    CIT Group Holdings    5.410%    3/17/97      4,854
   2,462    Household Finance
            Corporation           5.520%    1/10/97      2,459
   5,000    Household Finance
            Corporation           5.320%    1/10/97      4,993
   4,237    Norwest Financial,
            Inc.                  5.300%    1/29/97      4,220
   8,000    Norwest Financial,
            Inc.                  5.300%    1/31/97      7,965
   8,000    Norwest Financial,
            Inc.                  5.290%    2/18/97      7,944
   8,000    Norwest Financial,
            Inc.                  5.290%    2/19/97      7,942
   6,000    Norwest Financial,
            Inc.                  5.310%    2/21/97      5,955
   8,000    PHH Corporation       5.370%    1/29/97      7,967
   8,500    PHH Corporation       5.370%    1/30/97      8,463
   5,000    PHH Corporation       5.460%     2/4/97      4,974
   5,000    PHH Corporation       5.480%     2/5/97      4,973
   3,677    PHH Corporation       5.380%     2/7/97      3,657
   3,000    PHH Corporation       5.420%    2/12/97      2,981
   3,361    PHH Corporation       5.450%    2/14/97      3,339
- --------                                              --------
 154,711                                               153,812
- --------                                              --------


<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<C>         <S>                 <C>        <C>        <C>
MANUFACTURING -- 14.0%
$  8,000    Dover Corporation     5.470%     2/7/97   $  7,955
   6,582    John Deere Capital
            Corporation           5.390%    1/31/97      6,553
     841    Ford Motor Credit
            Company               5.310%     1/8/97        840
   2,976    Ford Motor Credit
            Company               5.550%     1/9/97      2,972
   3,071    Ford Motor Credit
            Company               5.300%    1/24/97      3,061
   7,678    Ford Motor Credit
            Company               5.330%     2/5/97      7,638
   3,520    General Electric
            Capital
            Corporation           5.370%    1/13/97      3,514
   6,293    General Electric
            Capital
            Corporation           5.500%    1/22/97      6,273
   4,500    General Electric
            Capital
            Corporation           5.310%    1/23/97      4,485
   5,800    General Electric
            Capital
            Corporation           5.320%    1/27/97      5,778
   5,981    General Electric
            Capital
            Corporation           5.410%    1/29/97      5,956
   3,000    General Electric
            Capital
            Corporation           5.410%    1/30/97      2,987
   3,436    General Electric
            Capital
            Corporation           5.560%     2/3/97      3,419
   3,110    General Electric
            Capital
            Corporation           5.310%     3/5/97      3,081
   2,100    General Electric
            Capital Services,
            Inc.                  5.370%    3/14/97      2,077
   8,946    General Electric
            Company               5.280%    2/14/97      8,888
   8,100    General Electric
            Company               5.300%    2/20/97      8,040
   3,102    General Electric
            Company               5.310%    2/24/97      3,077
   4,500    Minnesota Mining &
            Manufacturing Co.     5.290%    2/21/97      4,466
   3,000    Paccar Financial
            Corporation           5.300%    1/28/97      2,988
   6,000    Paccar Financial
            Corporation           5.280%    2/25/97      5,952
   6,000    Paccar Financial
            Corporation           5.280%    2/26/97      5,951
   1,050    Paccar Financial
            Corporation           5.300%    2/28/97      1,041
- --------                                              --------
 107,586                                               106,992
- --------                                              --------
</TABLE>
 
                                       24
<PAGE>   112
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<S>         <C>                 <C>        <C>        <C>
BROKERAGE -- 7.8%
$  8,000    Merrill Lynch &
            Company, Inc.         5.330%    1/14/97   $  7,985
   6,100    Merrill Lynch &
            Company, Inc.         5.330%    1/24/97      6,079
   5,000    Merrill Lynch &
            Company, Inc.         5.350%    1/31/97      4,978
   2,300    Merrill Lynch &
            Company, Inc.         5.390%    2/18/97      2,284
   8,600    Merrill Lynch &
            Company, Inc.
            Australia             5.420%    2/18/97      8,538
   6,702    Morgan Stanley
            Group Incorporated    5.320%    1/13/97      6,690
   5,216    Morgan Stanley
            Group Incorporated    5.320%    1/15/97      5,205
   5,000    Morgan Stanley
            Group Incorporated    5.320%    1/16/97      4,989
   2,500    Morgan Stanley
            Group Incorporated    5.550%    1/27/97      2,490
   4,226    Morgan Stanley
            Group Incorporated    5.320%    2/10/97      4,201
   5,700    Morgan Stanley
            Group Incorporated    5.320%    2/11/97      5,665
- --------                                              --------
  59,344                                                59,104
- --------                                              --------
CHEMICAL / FOREST -- 6.4%
   3,500    DuPont (E.I.) De
            Nemours & Co.         5.280%    2/11/97      3,479
   8,456    DuPont (E.I.) De
            Nemours & Co.         5.260%    2/12/97      8,404
   4,921    DuPont (E.I.) De
            Nemours & Co.         5.290%    2/27/97      4,880
   2,000    Great Lakes
            Chemical
            Corporation           5.370%    1/21/97      1,994
   5,325    Great Lakes
            Chemical
            Corporation           5.400%     3/7/97      5,273
   4,241    Great Lakes
            Chemical
            Corporation           5.380%    3/18/97      4,193
   2,500    Great Lakes
            Chemical
            Corporation           5.370%    3/28/97      2,468
   1,559    Great Lakes
            Chemical
            Corporation           5.450%     4/9/97      1,536
  11,400    Monsanto Co.          5.320%    1/15/97     11,376
   5,000    Monsanto Co.          5.300%     2/6/97      4,973
- --------                                              --------
  48,902                                                48,576
- --------                                              --------
</TABLE>
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<S>         <C>                 <C>        <C>        <C>
ENERGY -- 5.5%
$  4,909    Chevron U.K.
            Investment PLC        5.320%     1/6/97   $  4,905
   3,400    Chevron U.K.
            Investment PLC        5.510%     1/7/97      3,397
   6,100    Chevron U.K.
            Investment PLC        5.320%    1/13/97      6,089
   8,000    Chevron U.K.
            Investment PLC        5.430%    1/17/97      7,981
   3,500    Chevron U.K.
            Investment PLC        5.470%    1/23/97      3,488
   6,000    Chevron U.K.
            Investment PLC        5.310%     2/7/97      5,967
   5,150    Chevron U.K.
            Investment PLC        5.310%    3/20/97      5,091
   4,999    Mobil Finance
            Corporation
            (Australia)           5.310%    1/24/97      4,982
- --------                                              --------
  42,058                                                41,900
- --------                                              --------
MEDIA / ENTERTAINMENT -- 4.9%
   2,725    Knight Ridder
            Incorporated          5.300%    1/10/97      2,721
   7,500    Knight Ridder
            Incorporated          5.300%    1/14/97      7,486
   4,000    Knight Ridder
            Incorporated          5.300%    1/16/97      3,991
   4,000    Knight Ridder
            Incorporated          5.300%    1/17/97      3,991
   5,000    Knight Ridder
            Incorporated          5.300%    1/28/97      4,980
  10,000    Knight Ridder
            Incorporated          5.320%    2/20/97      9,926
   4,500    Knight Ridder
            Incorporated          5.300%    3/21/97      4,448
- --------                                              --------
  37,725                                                37,543
- --------                                              --------
UTILITIES - TELEPHONE -- 4.4%
   6,000    American Telephone
            & Telegraph Corp.     5.370%     3/6/97      5,943
   5,000    American Telephone
            & Telegraph Corp.     5.370%     3/7/96      4,951
   4,470    BellSouth Capital
            Funding
            Corporation           5.360%    1/21/97      4,456
   5,000    BellSouth Capital
            Funding
            Corporation           5.300%     2/3/97      4,976
   2,970    BellSouth Capital
            Funding
            Corporation           5.300%     2/4/97      2,955
  10,000    BellSouth
            Telecommunications
            Inc.                  5.300%    2/13/97      9,937
- --------                                              --------
  33,440                                                33,218
- --------                                              --------
</TABLE>
 
                                       25
<PAGE>   113
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<C>         <S>                 <C>        <C>        <C>
UTILITIES -- ENERGY & GAS -- 3.4%
$  6,000    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.320%     1/9/97   $  5,993
   4,000    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.300%    1/13/97      3,993
   4,000    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.300%    1/17/97      3,991
   5,101    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.310%    1/22/97      5,085
   4,500    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.290%     2/3/97      4,478
   2,000    National Rural
            Utilities
            Cooperative
            Finance
            Corporation           5.290%     2/3/97      1,990
- --------                                              --------
  25,601                                                25,530
- --------                                              --------
TRANSPORTATION -- 2.4%
  18,239    Norfolk Southern
            Corporation           5.350%    3/13/97     18,046
- --------                                              --------
         MERCHANDISING -- 2.3%
   4,303    Winn-Dixie Stores
            Inc.                  5.300%    1/28/97      4,286
  12,950    Winn-Dixie Stores
            Inc.                  5.380%    1/28/97     12,898
- --------                                              --------
  17,253                                                17,184
- --------                                              --------
</TABLE>
 
<TABLE>
<CAPTION>
Principal                       Interest              Amortized
 Amount           Issue           Rate     Maturity     Cost
- ---------         -----         --------   --------   ---------
<C>         <S>                 <C>        <C>        <C>
ELECTRONIC / TECHNOLOGY -- 2.0%
$ 12,000    Pitney Bowes
            Credit Corporation    5.300%    3/10/97   $ 11,880
   3,000    Xerox Corporation     5.350%     1/6/97      2,998
- --------                                              --------
  15,000                                                14,878
- --------                                              --------
DRUGS / HEALTH -- 1.2%
   4,500    Pfizer
            Incorporated          5.280%    3/19/97      4,449
   5,000    Warner - Lambert
            Company               5.300%     1/8/97      4,995
- --------                                              --------
   9,500                                                 9,444
- --------                                              --------
OTHER CONSUMER -- 1.0%
   5,000    Proctor & Gamble
            Company               5.270%     2/6/97      4,974
   2,500    Proctor & Gamble
            Company               5.300%    2/19/97      2,482
- --------                                              --------
   7,500                                                 7,456
- --------                                              --------
FOOD / BEVERAGE / TOBACCO -- 0.5%
   4,000    Campbell Soup
            Company               5.300%    1/17/97      3,991
- --------                                              --------
 739,043    Total Commercial
            Paper                                      734,981
                                                      --------
            PORTFOLIO WEIGHTED
            AVERAGE MATURITY                37 Days
$757,712    TOTAL INVESTMENTS -- 99.1%                 753,652
            CASH AND OTHER ASSETS, LESS
            LIABILITIES -- .9%                           7,156
                                                      --------
            NET ASSETS -- 100.0%                      $760,808
                                                      ========
</TABLE>
 
- ---------------
 
VRN = Variable Rate Note
 
                See accompanying Notes to Financial Statements.
 
                                       26
<PAGE>   114
 
                 [WILLILAM BLAIR MUTUAL FUNDS, INC. LOGO]
 
                      STATEMENTS OF ASSETS AND LIABILITIES
                               DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
                                                                           VALUE     INTERNATIONAL               READY
                                                               GROWTH    DISCOVERY      GROWTH        INCOME    RESERVES
                                                                FUND       FUND          FUND          FUND       FUND
                                                              --------   ---------   -------------   --------   --------
<S>                                                           <C>        <C>         <C>             <C>        <C>
                           ASSETS
Investments, at market (cost $362,687; $--; $91,465;
  $147,817; and $753,652, respectively)                       $500,584    $   --       $104,630      $148,352   $753,652
Cash                                                                --     1,174             --            --         --
Receivable for:
  Fund shares sold                                               1,708     1,004            481           280     17,830
  Investments sold                                                  --        --          3,254            87         --
  Interest and dividends                                           328        --             60         1,546        251
  Foreign withholding tax                                           --        --            128            --         --
Deferred organization costs                                         --        13             10            --         --
Other assets                                                        23        --             --            --          1
                                                              --------    ------       --------      --------   --------
    Total assets                                               502,643     2,191        108,563       150,265    771,734

                        LIABILITIES
Cash overdraft                                                      --        --          2,487            52         --
Payable for:
  Fund shares redeemed                                             436        --             17            69     10,350
  Investments purchased                                             --        --            768            --         --
  Dividends                                                         --        --             --            --         86
  Management fee and organization
    costs (Notes 1 and 2)                                          318        14            103            76        373
Other                                                              115         2             40            62        117
                                                              --------    ------       --------      --------   --------
    Total liabilities                                              869        16          3,415           259     10,926
                                                              --------    ------       --------      --------   --------
      Net assets                                              $501,774    $2,175       $105,148      $150,006   $760,808
                                                              ========    ======       ========      ========   ========

                          CAPITAL
Capital stock ($0.001 par value; 37,209; 218; 7,540;
  14,602; and 760,912 shares issued and outstanding,
  respectively)                                               $     37    $   --       $      8      $     15   $    761
Paid-in-surplus                                                363,163     2,175         92,434       155,462    760,151
Net unrealized appreciation (depreciation) on
  investments and foreign currency transactions
  (net of unrealized PFIC gain distribution of $442 for
  International Growth Fund only)                              137,897        --         12,723           535         --
Accumulated undistributed net realized gain (loss) on
  investments and foreign currency transactions                    677        --             --        (6,119)      (107)
Undistributed net investment income (loss)                          --        --            (17)          113          3
                                                              --------    ------       --------      --------   --------
      Net assets                                              $501,774    $2,175       $105,148      $150,006   $760,808
                                                              ========    ======       ========      ========   ========
Net asset value per share                                       $13.48    $10.00         $13.95        $10.27      $1.00
                                                                ======    ======         ======        ======      =====
</TABLE>
 
                See accompanying Notes to Financial Statements.
 
                                       27
<PAGE>   115
 
                 [WILLIAM BLAIR MUTUAL FUNDS, INC. LOGO]
 
                            STATEMENTS OF OPERATIONS
                      FOR THE YEAR ENDED DECEMBER 31, 1996
                           (all amounts in thousands)
 
<TABLE>
<CAPTION>
                                                                     VALUE     INTERNATIONAL              READY
                                                         GROWTH    DISCOVERY      GROWTH       INCOME    RESERVES
                                                          FUND      FUND(a)        FUND         FUND       FUND
                                                         -------   ---------   -------------   -------   --------
<S>                                                      <C>       <C>         <C>             <C>       <C>
Investment income
  Interest                                              $ 1,167    $  --          $   177     $10,173    $39,282
  Dividends                                               2,020       --            1,724          --         --
  Less foreign tax withheld                                 (15)      --             (217)         --         --
                                                        -------    -----          -------     -------    -------
    Total investment income                               3,172       --            1,684      10,173     39,282
Expenses
  Investment advisory fees (Note 2)                       3,019       --            1,131         881      4,283
  Custodian fees                                            119       --              204          48        174
  Transfer agent fees                                       113        1               17          25        325
  Professional fees                                          51        4               51          46         50
  Registration fees                                          51        1               28          17         51
  Organization costs                                         --       --               10          --         --
  Miscellaneous                                             155        1               46          50        226
                                                        -------    -----          -------     -------    -------
    Total expenses before waiver                          3,508        7            1,487       1,067      5,109
      Less expenses waived and 
        absorbed by Company (Note 2)                         --       (7)              --          --         --
                                                        -------    -----          -------     -------    -------
    Net investment income (loss)                           (336)      --              197       9,106     34,173
                                                        -------    -----          -------     -------    -------
                                                  
                                                  
Net realized and unrealized gain (loss)
  on investments, foreign currency transactions 
  and other assets and liabilities
    Net realized gain (loss) on investments              27,804       --            3,025      (2,156)      (107)
    Net realized gain on foreign currency transactions
      and other assets and liabilities                       --       --              514          --         --
                                                        -------    -----          -------     -------    -------
    Total net realized gain (loss)                       27,804       --            3,539      (2,156)      (107)
Change in net unrealized appreciation/
  depreciation on investments, and
  other assets and liabilities (Note 1)                  43,376       --            6,539      (2,404)        --
                                                        -------    -----          -------     -------    -------
  Net realized and unrealized gain (loss)
    on investments, foreign currency and
    other assets and liabilities                         71,180       --           10,078      (4,560)      (107)
                                                        -------    -----          -------     -------    -------
Net increase in net
  assets resulting from operations                      $70,844    $  --          $10,275     $ 4,546    $34,066
                                                        =======    =====          =======     =======    =======
</TABLE>
 
- -------------------------
(a) For the period from December 23, 1996 (Commencement of Operations) to
    December 31, 1996.
 
                See accompanying Notes to Financial Statements.
 
                                       28
<PAGE>   116
 
                       WILLIAM BLAIR MUTUAL FUNDS, INC.
 
                      STATEMENTS OF CHANGES IN NET ASSETS
                 FOR THE YEARS ENDED DECEMBER 31, 1996 AND 1995
                           (all amounts in thousands)
<TABLE>
<CAPTION>
                                                             VALUE
                                                           DISCOVERY       INTERNATIONAL
                                         GROWTH FUND         FUND           GROWTH FUND               INCOME FUND
                                     -------------------   ---------   ---------------------      -------------------
                                       1996       1995      1996(A)      1996         1995          1996       1995
                                     --------   --------   ---------   --------      -------      --------   --------
<S>                                  <C>        <C>        <C>         <C>           <C>          <C>        <C>
Operations
  Net investment income (loss)       $   (336)  $    993   $      --   $    197      $   704      $  9,106   $  9,265
  Net realized gain (loss) on
    investments, foreign currency
    transactions and   
    other assets and liabilities       27,804     13,274          --      3,539         (403)       (2,156)      (955)
                                                                                                                      
  Change in net unrealized
    appreciation/depreciation
    on investments and other assets
    and liabilities                    43,376     58,269          --      6,539        5,958        (2,404)    11,783
                                     --------   --------   ---------   --------      -------      --------   --------
    Net increase in net assets
      resulting from operations        70,844     72,536          --     10,275        6,259         4,546     20,093
Distributions to shareholders from
  Net investment income                  (343)      (817)         --       (491)(b)     (880)(b)    (8,980)    (9,438)
  Net realized gain                   (19,503)   (13,275)         --     (3,125)          --            --         --
                                     --------   --------   ---------   --------      -------      --------   --------
                                      (19,846)   (14,092)         --     (3,616)        (880)       (8,980)    (9,438)
Capital stock transactions
  Shares sold                         165,769    106,709       2,175     29,640       20,612        28,857     23,930
  Shares issued in reinvestment of
    income dividends and capital
    gain distributions                 18,035     12,714          --      3,461          717         6,494      6,875
  Less shares redeemed                (96,064)   (32,391)         --    (24,374)      (7,349)      (28,281)   (37,880)
                                     --------   --------   ---------   --------      -------      --------   --------
Change from capital stock
  transactions                         87,740     87,032       2,175      8,727       13,980         7,070     (7,075)
                                     --------   --------   ---------   --------      -------      --------   --------
 
  Change in net assets                138,738    145,476       2,175     15,386       19,359         2,636      3,580
Net assets
  Beginning of period                 363,036    217,560          --     89,762       70,403       147,370    143,790
                                     --------   --------   ---------   --------      -------      --------   --------
  End of period                      $501,774   $363,036   $   2,175   $105,148      $89,762      $150,006   $147,370
                                     ========   ========   =========   ========      =======      ========   ========
- -------------------------
  Undistributed net investment
    income (loss) at the end of the
    period                           $     --   $    319   $      --   $    257      $   343      $    113   $    (13)
                                     ========   ========   =========   ========      =======      ========   ========
- -------------------------
Capital stock transactions
  Shares sold                          12,563      9,647         218      2,196        1,688         2,771      2,337
  Shares issued in reinvestment of
    income dividends and capital
    gain distributions                  1,351      1,092          --        253           55           630        668
  Less shares redeemed                 (7,220)    (2,875)         --     (1,751)        (595)       (2,735)    (3,670)
                                     --------   --------   ---------   --------      -------      --------   --------
Change from capital stock
  transactions                          6,694      7,864         218        698        1,148           666       (665)
                                     ========   ========   =========   ========      =======      ========   ========
 
<CAPTION>
 
                                        READY RESERVES FUND
                                     -------------------------
                                        1996          1995
                                     -----------   -----------
<S>                                  <C>           <C>
Operations
  Net investment income (loss)       $    34,173   $    31,846
  Net realized gain (loss) on
    investments,
    foreign currency transactions
    and
    other assets and liabilities            (107)           --
  Change in net unrealized
    appreciation/depreciation
    on investments and other assets
    and liabilities                           --            --
                                      ----------    ----------
    Net increase in net assets
      resulting from operations           34,066        31,846
Distributions to shareholders from
  Net investment income                  (34,170)      (31,846)
  Net realized gain                           --            --
                                      ----------    ----------
                                         (34,170)      (31,846)
Capital stock transactions
  Shares sold                          2,994,231     2,514,548
  Shares issued in reinvestment of
    income dividends and capital
    gain distributions                    33,371        31,117
  Less shares redeemed                (2,970,683)   (2,362,949)
                                      ----------    ----------
Change from capital stock
  transactions                            56,919       182,716
                                      ----------    ----------
  Change in net assets                    56,815       182,716
Net assets
  Beginning of period                    703,993       521,277
                                      ----------    ----------
  End of period                      $   760,808   $   703,993
                                      ==========    ==========
- -------------------------
  Undistributed net investment
    income (loss) at the end of the
    period                           $         3   $        --
                                      ==========    ==========
- -------------------------
Capital stock transactions
  Shares sold                          2,994,231     2,514,548
  Shares issued in reinvestment of
    income dividends and capital
    gain distributions                    33,371        31,117
  Less shares redeemed                (2,970,683)   (2,362,949)
                                      ----------    ----------
Change from capital stock
  transactions                            56,919       182,716
                                      ==========    ==========
</TABLE>
 
- ---------------
 
(a) For the period from December 23, 1996 (Commencement of Operations) to
December 31, 1996.
(b) Includes $160 and $414 relating to PFIC transactions which are treated as
ordinary income for Federal income tax purposes in 1996 and 1995, respectively.
 
                See accompanying Notes to Financial Statements.
 
                                       29
<PAGE>   117
                         NOTES TO FINANCIAL STATEMENTS
 
(1)  SIGNIFICANT ACCOUNTING POLICIES
     
(a)  Description of the Fund
 
     William Blair Mutual Funds, Inc. (the "Fund") is a no-load, open-end
diversified mutual fund currently consisting of five portfolios, each with its
own investment objective and policies.
 
     The Growth Fund is a portfolio whose principal objective is to provide
long-term appreciation of capital by investing in well-managed companies in
growing industries.
 
     The Value Discovery Fund, which commenced operations on December 23, 1996,
is a portfolio whose principal objective is to seek long-term capital
appreciation by investing with a value discipline primarily in the securities of
small companies.
 
     The International Growth Fund is a portfolio which invests primarily in
common stocks issued by companies domiciled outside the United States and
securities convertible into, exchangeable for, or having the right to buy such
common stocks. The investment objective of the portfolio is long-term capital
appreciation through investment in well-managed, quality, growth companies.
 
     The Income Fund is a portfolio designed to provide investors with as high a
level of current income as is consistent with preservation of capital.
 
     The Ready Reserves Fund is a money market portfolio designed for investors
who are looking for professional management of their reserve assets. The Ready
Reserves Fund portfolio seeks to obtain maximum current income consistent with
preservation of capital and invests exclusively in high quality money market
instruments.
 
     All of the portfolio's investments are subject to market fluctuations.
 
(b)  Investment Securities
 
     Equity securities traded on national securities markets are valued at the
last sale price or, in the absence of a sale on the date of valuation, at the
latest bid price. Long-term fixed-income securities are valued by using market
quotations or independent services that use prices provided by market makers or
estimates of market values obtained from yield data relating to instruments or
securities with similar characteristics. The value of a foreign security is
determined based upon its sale price on the foreign exchange or market on which
it is primarily traded as of the close of the appropriate exchange or, if there
have been no sales on the date of valuation at the latest bid price. Other
securities are valued at fair value as determined in good faith by the Board of
Directors. Short-term securities in all Funds except Ready Reserves Fund are
valued at cost which approximates market value. Securities in Ready Reserves
Fund are valued on the amortized cost method. Under this method, any premium or
discount, as of the date an investment security is acquired, is amortized on a
straight-line basis to maturity.
 
     Interest income is determined on the basis of interest accrued, adjusted
for amortization of premium or discount. Dividend income is recorded on the
ex-dividend date, except that certain dividends from foreign securities are
recorded as soon as the information is available. Securities transactions are
recorded on the trade date. Realized gains and losses from securities
transactions are reported on an identified cost basis.
 
     Put bonds may be redeemed at the discretion of the holder on specified
dates prior to maturity. Variable rate bonds and floating rate notes earn
interest at a coupon rate which fluctuates at specific time intervals. The
interest rates shown in the Income Fund and Ready Reserves Fund Portfolios of
Investments are the rates in effect at December 31, 1996.
 
                                      30
<PAGE>   118
 
(c) Share Valuation and Dividends to Shareholders
 
    Shares are sold and redeemed on a continuous basis at net asset value. Each
Fund determines net asset value per share by dividing the value of its assets,
less liabilities, by the number of shares outstanding as of the earlier of 3:00
p.m. or the daily close of business of the New York Stock Exchange for Growth
Fund, Value Discovery Fund and International Growth Fund or on each day when New
York banks are open for business (except Good Friday) for Income Fund and Ready
Reserves Fund. Dividends from net investment income of the Growth Fund, Value
Discovery Fund and International Growth Fund are declared at least annually.
Dividends from the Income Fund and Ready Reserves Fund are declared monthly and
daily, respectively. Capital gain distributions, if any, are declared annually
in December. Dividends payable to shareholders are recorded on the ex-dividend
date. Dividends are determined in accordance with Federal income tax principles
which may treat certain transactions differently from generally accepted
accounting principles.
 
(d) Repurchase Agreements
 
    The Fund may enter into repurchase agreements with its custodian, whereby
the Fund acquires ownership of a debt security and the custodian agrees, at the
time of the sale, to repurchase the debt security from the Fund at a mutually
agreed upon time and price. The Fund's policy is to take possession of
securities under repurchase agreements. The Fund minimizes credit risk by (i)
monitoring credit exposure of the custodian and (ii) monitoring collateral value
on a daily basis.
 
(e) Foreign Currency Translation and Forward Foreign Currency Contracts
 
    All assets and liabilities of the International Growth Fund denominated in
foreign currencies are translated into U.S. dollar amounts at the current
exchange rate at the day of valuation. The International Growth Fund may enter
into forward foreign currency contracts as a means of managing the risks
associated with changes in exchange rates for the purchase or sale of a specific
amount of a particular foreign currency. Additionally, from time to time, the
Fund may enter into contracts to hedge the value, in U.S. dollars, of securities
it currently owns. Forward foreign currency contracts and foreign currencies are
valued at the forward and current exchange rates, respectively, prevailing on
the day of valuation. Gains and losses from foreign currency transactions
associated with purchases and sales of investments are included with the net
realized or unrealized gain or loss on investments.
 
(f) Income Taxes
 
    Each Fund intends to comply with the special provisions of the Internal
Revenue Code available to regulated investment companies and, therefore, no
provision for Federal income taxes has been made in the accompanying financial
statements since the Funds intend to distribute their taxable income to their
shareholders and be relieved of all Federal income taxes. At December 31, 1996,
the Fund's most recent tax year-end, the Income Fund and the Ready Reserves Fund
have capital loss carryforwards of $6,121,000 and $107,000, respectively. These
loss carryforwards, which expire in 2004, can be used to offset net capital
gains.
 
    A reclassification of $7,737,000 has been made in 1996 in the capital
accounts of the Growth Fund from accumulated undistributed net realized gain on
investments into paid-in surplus to reflect a difference between financial and
income tax basis reporting resulting from an in-kind redemption of fund shares.
 
    The International Growth Fund has elected to mark-to-market its investment
in Passive Foreign Investment Companies ("PFIC's) for Federal income tax
purposes. In accordance with this election, the fund recognized unrealized
appreciation of $133,000 and $414,000 in 1996 and 1995, respectively. In
addition, the fund recorded net realized gains of $132,000 on sales of PFIC's
during 1996, of which $105,000 had been recognized in prior years. Dividends to
shareholders from net investment income included $160,000 and $414,000 relating
to PFIC's during 1996 and 1995, which are treated as ordinary income for Federal
income tax purposes.
 
                                       31
<PAGE>   119
 
(g) Organization Costs
 
     The initial organization costs of the Value Discovery Fund and
International Growth Fund have been paid by William Blair & Company L.L.C. (the
"Company"). The Funds will reimburse the Company for the amount of such expenses
not exceeding $50,000. The deferred organization costs are being amortized on
the straight-line method and repaid to the Company over a five year period.
 
(2) INVESTMENT ADVISORY, TRANSACTIONS WITH AFFILIATES AND DIRECTOR'S FEES
 
     The Company provides investment advisory and other administrative and
accounting services to the Funds under terms of the Management Agreement. The
Funds pay the Company a monthly fee determined as a specified percentage of
average daily net assets. The rates for the Growth Fund, International Growth
Fund, Income Fund and Ready Reserves Fund were modified effective May 1, 1996. A
summary of the annual rates expressed as a percentage of average daily net
assets, are as follows:
 
<TABLE>
<CAPTION>
                                   PRIOR TO MAY 1, 1996                 AFTER MAY 1, 1996
                             --------------------------------    --------------------------------
<S>                          <C>                                 <C>
Growth Fund                  0.625% of the first $75 million     0.75%
                             0.500%, in excess of $75 million
International Growth Fund    1.10% of the first $100 million     1.10% of the first $250 million
                             .95%, in excess of $100 million     1.00%, in excess of $250 million
Income Fund
  Management Fee             0.25% of the first $100 million     0.25% of the first $250 million
                             0.20%, in excess of $150 million    0.20%, in excess of $250 million
                             0.15%, in excess of $250 million
                             5.00% of gross income               5.00% of gross income
Ready Reserves Fund          0.625% of the first $250 million    0.625% of the first $250 million
                             0.600%, of the next $250 million    0.600%, of the next $250 million
                             0.550%, of the next $500 million    0.575%, of the next $2 billion
                             0.500%, of the next $2 billion      0.550%, in excess of $2.5 billion
                             0.450%, of the next $2 billion      
                             0.400%, in excess of $5 billion
</TABLE>
 
     The advisory fee for the Value Discovery Fund is equal to 1.15% of average
daily net assets. The Company has voluntarily agreed to waive the advisory fee
and to absorb other operating expenses if total expenses exceed 1.50% of average
daily net assets.
 
     Prior to September 30, 1996, the Company had a sub-advisory agreement with
Framlington Overseas Investment Management Ltd. (UK) for the International
Growth Fund whereby the Company paid a monthly fee at an annual rate equal to
0.40% of the first $100 million in average daily net assets and 0.275% of
average daily net assets in excess of $100 million. On October 1, 1996 the
Company began to directly manage the International Growth Fund.
 
     The Funds paid fees of $64,000 to non-affiliated directors of the Funds for
the period ended December 31, 1996.
 
                                       32
<PAGE>   120
 
(3) INVESTMENT TRANSACTIONS
 
     Investment transactions, excluding money market instruments, for the period
ended December 31, 1996, are as follows:
 
<TABLE>
<CAPTION>                                            
                                                                            INTERNATIONAL
                                                                 GROWTH        GROWTH        INCOME
                                                                  FUND          FUND          FUND
                                                                --------    -------------    -------
                                                                     (all amounts in thousands)
<S>                                                             <C>         <C>              <C>
Purchases                                                       $269,794       $91,070       $89,218
Proceeds from sales and maturities                               182,189        87,977        85,575
Gross unrealized appreciation (depreciation) at
  December 31, 1996 is as follows:
  Unrealized appreciation                                       $147,017       $15,125       $ 1,603
  Unrealized depreciation                                         (9,120)       (2,402)       (1,068)
                                                                --------    ----------       -------
Net unrealized appreciation                                     $137,897       $12,723       $   535
                                                                ========    ==========       =======
</TABLE>
 
     Cost of investments is the same for financial statement and Federal income
tax purposes except for International Growth Fund where the cost is $91,907.
 
                                       33
<PAGE>   121
 
FINANCIAL HIGHLIGHTS
 
<TABLE>
<CAPTION>
                                                                                YEARS ENDED DECEMBER 31,
                                                                --------------------------------------------------------
                        GROWTH FUND                               1996        1995        1994        1993        1992
                        -----------                             --------    --------    --------    --------    --------
<S>                                                             <C>         <C>         <C>         <C>         <C>
Net asset value, beginning of period                            $ 11.900    $  9.600    $  9.730    $  9.390    $  9.490
Income from investment operations:
 Net investment income (loss)                                      (.010)       .034        .027        .035        .045
 Net realized and unrealized gain on investments                   2.144       2.750        .581       1.389        .671
                                                                 -------     -------     -------     -------     -------
Total from investment operations                                   2.134       2.784        .608       1.424        .716
Less distributions from:
 Net investment income                                              .010        .030        .025        .035        .047
 Net realized gain                                                  .544        .454        .713       1.049        .769
                                                                 -------     -------     -------     -------     -------
Total distributions                                                 .554        .484        .738       1.084        .816
                                                                 -------     -------     -------     -------     -------
Net asset value, end of period                                  $ 13.480    $ 11.900    $  9.600    $  9.730    $  9.390
                                                                 =======     =======     =======     =======     =======
Total return (%)                                                   17.99       29.07        6.45       15.51        7.61
Ratios to average daily net assets (%):
 Expenses                                                            .79         .65         .71         .78         .83
 Net investment income (loss)                                       (.08)        .34         .32         .38        1.34
Supplemental data:
 Net assets at end of period (in thousands)                     $501,774    $363,036    $217,560    $150,046    $111,082
 Portfolio turnover rate (%)                                          43          32          46          55          27
 Average commission rate                                        $  .0621
 
<CAPTION>
                    VALUE DISCOVERY FUND                          1996(A)
                    --------------------                          -------
<S>                                                               <C>        <C>         <C>         <C>         <C>
Net asset value, beginning of period                              $10.000
Income from investment operations:
 Net investment income (loss)                                         --
 Net realized and unrealized gain on investments                      --
                                                                  -------
Total from investment operations                                      --
Less distributions from:
 Net investment income                                                --
 Net realized gain                                                    --
                                                                  -------
Total distributions                                                   --
Net asset value, end of period                                    $10.000
                                                                  =======
Total return (%)                                                      --
Ratios to average daily net assets (%):
 Expenses                                                             --
 Net investment income                                                --
Supplemental data:
 Net assets at end of period (in thousands)                       $    2
 Portfolio turnover rate (%)                                          --
</TABLE>
 
- ---------------
 
(a) For the period December 23, 1996 (Commencement of Operations) to December
    31, 1996.
 
                                       34
<PAGE>   122
 
<TABLE>
<CAPTION>
                                                                    YEARS ENDED DECEMBER 31,          PERIOD ENDED
                                                             --------------------------------------   DECEMBER 31,
                 INTERNATIONAL GROWTH FUND                     1996      1995      1994      1993      1992(A)(B)
                 -------------------------                   --------   -------   -------   -------   ------------
<S>                                                          <C>        <C>       <C>       <C>       <C>
Net asset value, beginning of period                         $ 13.120   $12.360   $13.180   $10.130     $10.000
Income from investment operations:
 Net investment income (loss)                                    .029      .105      .016      .008       (.011)
 Net realized and unrealized gain (loss) on investments,
   foreign currency and other assets and liabilities            1.299      .785     (.025)    3.401        .141
                                                             --------  --------   -------   -------     -------
Total from investment operations                                1.328      .890     (.009)    3.409        .130
Less distributions from:
 Net investment income                                           .068(c)    .130(c)    .024      --          --
 Net realized gain                                               .430        --      .714      .359          --
 Tax return of capital                                             --        --      .073(d)      --         --
                                                             --------  --------   -------   -------     -------
Total distributions                                              .498      .130      .811      .359          --
                                                             --------  --------   -------   -------     -------
Net asset value, end of period                               $  13.95   $13.120   $12.360   $13.180     $10.130
                                                             ========  ========  ========  ========     =======
Total return (%)                                                10.20      7.22      (.04)    33.65        1.30
Ratios to average daily net assets (%):
 Expenses(e)                                                     1.44      1.48      1.51      1.71        1.88
 Net investment income (loss)(e)                                  .19       .87       .15       .11        (.56)
Supplemental data:
 Net assets at end of period (in thousands)                  $105,148   $89,762   $70,403   $40,298     $10,767
 Portfolio turnover rate (%)                                       89        77        40        83           5
 Average commission rate                                       $.0051
</TABLE>
 
<TABLE>
<CAPTION>
                                                                           YEARS ENDED DECEMBER 31,
                                                             ----------------------------------------------------
                        INCOME FUND                            1996       1995       1994       1993       1992
                        -----------                          --------   --------   --------   --------   --------
<S>                                                          <C>        <C>        <C>        <C>        <C>
Net asset value, beginning of period                         $ 10.570   $  9.850   $ 10.580   $ 10.600   $ 10.770
Income from investment operations:
 Net investment income                                           .619       .646       .661       .651       .832
 Net realized and unrealized gain (loss) on investments         (.309)      .732      (.741)      .159      (.089)
                                                             --------  ---------    --------   -------    -------
Total from investment operations                                 .310      1.378      (.080)      .810       .743
Less distributions:
 Net investment income                                           .610       .658       .646       .651       .827
 Net realized gain                                                 --         --       .004       .179       .086
                                                             --------  ---------    --------   -------    -------
Total distributions                                              .610       .658       .650       .830       .913
                                                             --------  ---------    --------   -------    -------
Net asset value, end of period                               $ 10.270   $ 10.570   $  9.850   $ 10.580   $ 10.600
                                                             ========  =========   ========   ========   ========
Total return (%)                                                 3.07      14.37       (.74)      7.82       7.17
Ratios to average daily net assets (%):
 Expenses                                                         .70        .68        .68        .70        .88
 Net investment income                                           5.97       6.24       6.33       5.96       7.69
Supplemental data:
 Net assets at end of period (in thousands)                  $150,006   $147,370   $143,790   $204,381   $136,896
 Portfolio turnover rate (%)                                       66         54         63        114         47
</TABLE>
 
- ---------------
 
(a) Ratios are annualized except total returns for periods less than one year.
 
(b) For the period October 1, 1992 (Commencement of Operations) to December 31,
    1992.
 
(c) Includes $.022 and $.061 in PFIC transactions which are treated as ordinary
    income for Federal income tax purposes for 1996 and 1995, respectively.
 
(d) Includes $431 relating to a tax return of capital.
 
(e) Without the waiver of expenses in 1993 and 1992, the expense ratios would
    have been 2.08% and 2.55% and the net investment income (loss) ratios would
    have been (.25)% and (1.22)%, respectively.
 
                                      35
<PAGE>   123
 
<TABLE>
<CAPTION>
                                                             YEARS ENDED DECEMBER 31,
                                               ----------------------------------------------------
             READY RESERVES FUND                 1996       1995       1994       1993       1992
             -------------------               --------   --------   --------   --------   --------
<S>                                            <C>        <C>        <C>        <C>        <C>
 
Net asset value, beginning of period           $   1.00   $   1.00   $   1.00   $   1.00   $   1.00
 
Income from investment operations:
 
  Net investment income                             .05        .05        .04        .03        .03
 
  Net realized loss on investments                   --         --       (.01)        --         --
                                               --------   --------   --------   --------   --------
Total from investment operations                    .05        .05        .03        .03        .03
 
Less distributions:
 
  Net investment income                             .05        .05        .04        .03        .03
                                               --------   --------   --------   --------   --------
Total distributions                                 .05        .05        .04        .03        .03
                                               --------   --------   --------   --------   --------
 
Capital contribution                                 --         --        .01         --         --
                                               --------   --------   --------   --------   --------
Net asset value, end of period                 $   1.00   $   1.00   $   1.00   $   1.00   $   1.00
                                               ========   ========   ========   ========   ========
Total return (%)                                   4.81       5.45       3.67(a)     2.64      3.32
 
Ratios to average daily net assets (%):
 
  Expenses                                          .71        .72        .71        .71        .71
 
  Net investment income                            4.78       5.30       3.61       2.61       3.27
 
Supplemental data:
 
  Net assets at end of period (in thousands)   $760,808   $703,993   $521,277   $477,268   $448,797
</TABLE>
 
- ---------------
 
(a) The total return includes the impact of the Company's capital contribution.
    Without the Company's capital contribution, the total return would have been
    3.40%.
 
                                       36
<PAGE>   124
 
                         REPORT OF INDEPENDENT AUDITORS
 
To the Board of Directors and Shareholders
WILLIAM BLAIR MUTUAL FUNDS, INC.
 
     We have audited the accompanying statements of assets and liabilities,
including the portfolios of investments, of William Blair Mutual Funds, Inc.
(comprised of Growth Fund, Value Discovery Fund, International Growth Fund,
Income Fund and Ready Reserves Fund) (collectively, the "Funds") as of December
31, 1996, and the related statements of operations for the year then ended and
changes in net assets for each of the two fiscal years in the period then ended,
except for the Value Discovery Fund for which the period is December 23, 1996
(Commencement of Operations) to December 31, 1996, and the financial highlights
for the periods indicated therein. These financial statements and financial
highlights are the responsibility of the Funds' management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of investments owned as of
December 31, 1996, by correspondence with the custodian and brokers. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.
 
     In our opinion, the financial statements and financial highlights referred
to above present fairly, in all material respects, the financial position of
William Blair Mutual Funds, Inc. at December 31, 1996, and the results of their
operations, the changes in their net assets and the financial highlights for the
periods indicated therein, in conformity with generally accepted accounting
principles.
 
                                                Ernst & Young LLP 
                                                ERNST & YOUNG LLP
 
Chicago, Illinois
February 3, 1997
 
                                       37
<PAGE>   125
 
SPECIAL MEETINGS OF SHAREHOLDERS
 
     A Special Meeting of Shareholders was held on March 7, 1996. At the
meeting, shareholders of the Fund were asked to consider and act upon six
issues: the election of the seven nominees for director; the approval of an
amendment to the Fund's Articles of Incorporation authorizing the establishment
of separate classes of shares; approval of an amendment to the Fund's Articles
of Incorporation to permit the redemption of series of shares; ratification of
the selection of Ernst & Young LLP as the Fund's independent auditors; approval
of the new management agreement; and approval of an amendment to the Growth
Fund's investment objective. The results of all matters voted on by shareholders
of the Funds at the Special Meeting were as follows:
 
A. ELECTION OF THE SEVEN NOMINEES FOR DIRECTOR:
 
<TABLE>
<CAPTION>
                                                                       FOR                 WITHHELD
                                                                   -----------            ----------
<S>                             <C>                                <C>                    <C>
Growth Fund                     Conrad Fischer                      25,290,662               291,076
                                Vernon Armour                       25,281,674               300,064
                                George Kelm                         25,282,580               299,158
                                Ann P. McDermott                    25,239,304               342,434
                                James M. McMullan                   25,289,797               290,941
                                John B. Schwemm                     25,288,928               292,810
                                W. James Truettner, Jr.             25,290,636               291,102

International Growth Fund       Conrad Fischer                       7,468,902                 7,388
                                Vernon Armour                        7,468,902                 7,388
                                George Kelm                          7,468,902                 7,388
                                Ann P. McDermott                     7,469,739                 6,551
                                James M. McMullan                    7,468,902                 7,388
                                John B. Schwemm                      7,468,902                 7,388
                                W. James Truettner, Jr.              7,468,902                 7,388

Income Fund                     Conrad Fischer                      14,003,865                18,594
                                Vernon Armour                       14,002,528                19,931
                                George Kelm                         14,002,528                19,931
                                Ann P. McDermott                    14,002,528                19,931
                                James M. McMullan                   14,003,865                18,594
                                John B. Schwemm                     14,002,528                19,931
                                W. James Truettner, Jr.             14,003,865                18,594

Ready Reserves Fund             Conrad Fischer                     697,546,412            13,663,682
                                Vernon Armour                      697,546,412            13,663,682
                                George Kelm                        697,546,412            13,663,682
                                Ann P. McDermott                   697,546,412            13,663,682
                                James M. McMullan                  697,546,412            13,663,682
                                John B. Schwemm                    697,546,412            13,663,682
                                W. James Truettner, Jr.            697,546,412            13,663,682
</TABLE>
 
B. APPROVAL OF AN AMENDMENT TO THE FUND'S ARTICLES OF INCORPORATION AUTHORIZING
   THE ESTABLISHMENT OF SEPARATE CLASSES OF SHARES:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                   <C>               <C>              <C>
Growth Fund                                            16,414,473        7,774,224        1,392,442
International Growth Fund                               6,089,506        1,359,521           27,263
Income Fund                                            13,266,777          651,876          103,805
Ready Reserves Fund                                   678,899,931       23,022,369        9,287,794
</TABLE>
 
                                       38
<PAGE>   126
 
C. APPROVAL OF AN AMENDMENT TO THE FUND'S ARTICLES OF INCORPORATION TO PERMIT
   THE REDEMPTION, BY BOARD ACTION, OF SERIES OF SHARES:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                  <C>               <C>               <C>
Growth Fund                                            19,070,938          638,950        2,028,043
International Growth Fund                               7,392,951           55,406           27,933
Income Fund                                             8,879,866           62,738           59,115
Ready Reserve Fund                                    396,287,229       19,043,815        8,847,982
</TABLE>
 
D. RATIFICATION OF THE SELECTION OF ERNST & YOUNG LLP AS THE FUND'S INDEPENDENT
   AUDITORS FOR THE FISCAL YEAR ENDING DECEMBER 31, 1996:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                  <C>               <C>               <C>
Growth Fund                                            25,241,034          149,453          191,251
International Growth Fund                               7,469,995          837,686            5,458
Income Fund                                            13,969,024           16,354           37,081
Ready Reserves Fund                                   693,504,783       12,871,620        4,833,691
</TABLE>
 
E. APPROVAL OF THE NEW MANAGEMENT AGREEMENT:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                  <C>               <C>              <C>
Growth Fund                                            17,620,139        3,680,445          437,348
International Growth Fund                               7,316,082          105,284           54,924
Income Fund                                             8,764,699          136,333          100,687
Ready Reserves Fund                                   391,001,236       21,852,722       11,325,068
</TABLE>
 
F. APPROVAL OF AN AMENDMENT TO THE GROWTH FUND PORTFOLIO'S INVESTMENT OBJECTIVE:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                   <C>               <C>                <C>
Growth Fund                                            20,154,604        1,256,369          326,958
</TABLE>
 
     Another Special Meeting of Stockholders of the International Growth Fund of
William Blair Mutual Funds, Inc. was held on December 17, 1996. At the meeting,
shareholders were asked to consider and act upon one issue:
 
A. APPROVAL OR DISAPPROVAL OF AMENDMENTS TO REFORM THE PRIOR AND CURRENT
   MANAGEMENT AGREEMENTS, RATIFYING PRIOR AND CURRENT PAYMENTS MADE UNDER THE
   AGREEMENTS AS REFORMED:
 
<TABLE>
<CAPTION>
                                                          FOR            AGAINST          ABSTAIN
                                                      -----------       ----------       ----------
<S>                                                   <C>                 <C>              <C>
International Growth Fund                               6,465,834           11,541            6,223
</TABLE>
 
                                       39
<PAGE>   127
BOARD OF DIRECTORS

CONRAD FISCHER, CHAIRMAN
        Principal, William Blair & Company, L.L.C.

VERNON ARMOUR
        Private Investor

GEORGE KELM
        Retired Chairman of the Board, Sahara Coal Company, Inc.

JAMES M. MCMULLAN
        Principal, William Blair & Company, L.L.C.

ANN P. MCDERMOTT
        Director and Trustee
        Profit and not-for-profit organizations

JOHN B. SCHWEMM
        Retired Chairman and CEO, R.R. Donnelley & Sons Company

W. JAMES TRUETTNER, JR., SENIOR VICE PRESIDENT
        Principal, William Blair & Company, L.L.C.

OFFICERS

Rocky Barber, President
Mark A. Fuller, III, Senior Vice President
George Greig, Senior Vice President
Bentley M. Myer, Senior Vice President
Norbert W. Truderung, Senior Vice President
James S. Kaplan, Vice President
John P. Kayser, Vice President
Terence M. Sullivan, Vice President
Walter Rucinski, Treasurer
Janet V. Gassmann, Secretary

INVESTMENT ADVISER

        William Blair & Company, L.L.C.

TRANSFER AGENT

        State Street Bank and Trust Company
        P.O. Box 9104
        Boston, MA  02266-9104
        800-635-2840
        (Massachusetts 800-635-2840)

WILLIAM BLAIR MUTUAL FUNDS, INC.
222 West Adams Street
Chicago, IL  60606
<PAGE>   128

                        WILLIAM BLAIR MUTUAL FUNDS, INC.

                                     PART C

                               OTHER INFORMATION


ITEM 24.         Financial Statements and Exhibits

         (a)     Financial Statements:

                 (i)      Financial Statements included in Part A of the
                          Registration Statement:

                          For Growth Fund, Value Discovery Fund, International
                          Growth Fund, Income Fund, and Ready Reserves Fund:

                          Financial Highlights
   
                          For Value Discovery Fund:

                          Financial Highlights in Supplement to Prospectus
    
                 (ii)     Financial Statements included in Part B of the
                          Registration Statement:

                          The following information contained in the Annual
                          Report for William Blair Mutual Funds, Inc. (Growth
                          Fund, Value Discovery Fund, International Growth
                          Fund, Income Fund, and Ready Reserves Fund) for the
                          fiscal year ended December 31, 1996 is incorporated
                          by reference into Part A.

                          William Blair Mutual Funds, Inc.

                              Growth Fund, Value Discovery Fund, International
                              Growth Fund, Income Fund, and Ready Reserves Fund

                                     Statements of Assets and Liabilities at 
                                     December 31, 1996

                                     Statements of Operations for the Year
                                     Ended December 31, 1996 (for the period 
                                     from December 23, 1996 (Commencement of 
                                     Operations) to December 31, 1996 for the 
                                     Value Discovery Fund)

                                     Statements of Changes in Net Assets for
                                     the Years Ended December 31, 1996 and 
                                     1995 (for the period from December 23, 
                                     1996 (Commencement of Operations) to 
                                     December 31, 1996 for the Value Discovery
                                     Fund)


                                     C-1


<PAGE>   129


                         Notes to Financial Statements
   
                 Value Discovery Fund:

                 Statement of Assets and Liabilities at May 31, 1997

                 Statement of Operations for the five month period ended May
                 31, 1997

                 Statement of Changes in Net Assets for the five month period
                 ended May 31, 1997
    
                 Growth Fund, Value Discovery Fund, International Growth Fund,
                 Income Fund, and Ready Reserves Fund

                        Schedules II, III, IV, V, VI and VII are omitted as 
                        the required information is not present

                        Schedule I has been omitted as the required information
                        is presented in the Portfolio of Investments at
                        December 31, 1996

   
<TABLE>
<CAPTION>
         (b)     Exhibits
         <S>              <C>
         99.B.1  a.       Articles of Incorporation.(1)
         99.B.1  b.       Form of Amendment to Articles of Incorporation.(1)
         99.B.2           By-laws, as amended.(1)
         99.B.3           Inapplicable
         99.B.4           See items 1 and 2 above.
         99.B.5  a.       Form of Management Agreement dated May 1, 1996, as amended.(3)
         99.B.5  b.       Form of Management Agreement dated December 23, 1996.(2)
         99.B.6           Underwriting Agreement.(1)
         99.B.7           Inapplicable.
         99.B.8           Custodian Agreement.(1)
         99.B.9           Inapplicable.
         99.B.10          Inapplicable.
         99.B.11          Consent of Ernst & Young LLP.*
         99.B.12          Inapplicable.
         99.B.13          Subscription Agreement.(1)
         99.B.14          Inapplicable.
         99.B.15          Inapplicable.
         99.B.16          Schedule for calculation of performance quotation.(1)
             27           Financial Data Schedule.*
         99.B.18          Inapplicable.
         99.485(b)        Representation of Counsel (Rule 485(b)).*
- ---------------------                                                      
</TABLE>

(1)      Incorporated herein by reference to Post-Effective Amendment No. 13 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about March 1, 1996.

(2)      Incorporated herein by reference to Post-Effective Amendment No. 15 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about November 5, 1996.



                                     C-2
    
<PAGE>   130
   

(3)      Incorporated herein by reference to Post-Effective Amendment No. 15 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about November 5, 1996.

*        Filed Herewith.
    

ITEM 25.         Persons Controlled by or under Common Control with Registrant

                 Inapplicable.

ITEM 26.         Number of Holders of Securities
   
                 Number of holders of securities as of May 31, 1997:


<TABLE>
<CAPTION>
                     Title of Class                                                 Number of
                     --------------                                               Record Holders
                                                                                  --------------

                     <S>                                                          <C>
                     Shares of common stock of:

                        Growth Fund                                                    9,972
                                                                                      ------      
                        Value Discovery Fund                                             312
                                                                                      ------      
                        International Growth Fund                                      1,331
                                                                                      ------      
                        Income Fund                                                    2,017
                                                                                      ------      
                        Ready Reserves Fund                                           21,119
                                                                                      ------
</TABLE>
    
ITEM 27.         Indemnification

                 Section 2-418 of the Maryland General Corporation Law provides
for indemnification of directors, officers, employees and agents.

                 Article XII of the Registrant's Articles of Incorporation
provides for indemnification of directors and officers under certain
circumstances but does not allow such indemnification in cases of willful
misfeasance, bad faith, gross negligence, or reckless disregard of the duties
involved in the conduct of his office.

         The Investment Management Agreement between the Registrant and William
Blair & Company, L.L.C. (the "Adviser") provides that, in the absence of
willful misfeasance, bad faith, gross negligence or reckless disregard of
obligations or duties thereunder on the part of the Adviser, the Adviser shall
not be liable for any error of judgment or mistake of law, or for any loss
suffered by the Fund in connection with the matters to which such Agreement
relates.

         Insofar as indemnification for liabilities arising under the
Securities Act of 1933 (the "1933 Act") may be permitted to directors,
officers, and controlling persons of the Registrant pursuant to the foregoing
provisions, or otherwise, the Registrant has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against
public policy

                                     C-3



<PAGE>   131


as expressed in the 1933 Act and is, therefore, unenforceable.  In the event
that a claim for indemnification against such liabilities (other than the
payment by the Registrant of expenses incurred or paid by a director, officer,
or controlling person of the Registrant in the successful defense of any
action, suit, or proceeding) is asserted by such director, officer, or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the 1933 Act and will be governed by the final adjudication of
such issue.

ITEM 28.         Business and Other Connections of Investment Adviser

                 Registrant's investment manager is William Blair & Company,
L.L.C., a limited liability company.  In addition to its services to Registrant
as investment manager as set forth in Parts A and B of this Registration
Statement on Form N-1A, William Blair & Company, L.L.C.  is a registered
broker-dealer and investment adviser and engages in investment banking.

         The principal occupations of the principals and primary officers of
William Blair & Company, L.L.C. are their services as principals and officers
of that Company.  The address of William Blair & Company, L.L.C. and Registrant
is 222 West Adams Street, Chicago, Illinois 60606.

         Set forth below is information as to any other business, profession,
vocation, or employment of a substantial nature in which each principal of
William Blair & Company, L.L.C. is, or at any time during the last two fiscal
years has been, engaged for his own account or in the capacity of director,
officer, employee, partner, or trustee:


<TABLE>
<CAPTION>
                  Name and Position with                Name of Company and/or                                                 
                  William Blair & Company, L.L.C.       Principal Business                       Capacity                      
                  ----------------------------------------------------------------------------------------------------------   
                  <S>                                   <C>                                      <C>

                  James L. Barber, Jr.,                 LaRabida Hospital Foundation             Vice President of the Board
                  Principal                                                                      of Directors

                                                        Stanford Associates                      President

                                                        William Blair Mutual Funds, Inc.         President


                  Bowen Blair,                          The Art Institute of Chicago             Trustee
                  Senior Principal
                                                        Chicago Historical Society               Trustee

                                                        Field Museum of Natural History          Trustee

</TABLE>

                                     C-4



<PAGE>   132


<TABLE>
<CAPTION>

                  Name and Position with                Name of Company and/or                                                 
                  William Blair & Company, L.L.C.       Principal Business                       Capacity                      
                  ----------------------------------------------------------------------------------------------------------   
                  <S>                                   <C>                                      <C>
                  Edward McC. Blair, Sr.,               The Art Institute of Chicago             Life Trustee
                  Senior Principal
                                                        College of The Atlantic                  Board of Trustees

                                                        Pullman Educational Foundation           Life Trustee

                                                        Rush Presbyterian-St. Luke               Life Trustee
                                                        Medical Center

                                                        University of Chicago                    Life Trustee





                  Edward McC. Blair, Jr.,               Chicago Dock and Canal Trust             Trustee
                  Principal
                                                        Chicago Zoological Society               Deputy Chairman

                                                        Research Medical, Inc.                   Director

                                                        University of Chicago Hospital           Trustee





                  Kurt Beuchel,                         Social Security Fund of the              Member
                  Principal                             Principality of Liechtenstein            Investment Advisory Board

                  David G. Chandler,                    The Bruss Company                        Director
                  Principal
                                                        Encore Paper Company                     Director

                                                        Electronic Manufacturing Systems,        Director
                                                        Inc.

                                                        Gibraltar Packaging Group                Director

                                                        International Jensen Incorporated        Director

                                                        Morton Grove Pharmaceuticals, Inc.       Director

                                                        Predelivery Service Corporation          Director



                  E. David Coolidge, III,               Pittway Corporation                      Director
                  Chief Executive Officer

                  Conrad Fischer                        APM Limited Partnership                  General Partner
                  Chief Investment Officer
                                                        Chicago Child Care                       Trustee, Emeritus

                                                        William Blair Mutual Funds, Inc.         Chairman and Director


                  Thomas A. FitzSimmons,                Credit Acceptance Corporation            Director
                  Principal

                  Mark A. Fuller, III,                  Fuller Investment Company                President
                  Principal
                                                        Fulsen Howney Partners                   Partner

                                                        Three Rio Grande, LLC                    Principal

                                                        William Blair Mutual Funds, Inc.         Senior Vice President



</TABLE>


                                     C-5

<PAGE>   133

<TABLE>
<CAPTION>
                  Name and Position with                Name of Company and/or                                                   
                  William Blair & Company, L.L.C.       Principal Business                       Capacity                        
                  ----------------------------------------------------------------------------------------------------------     
                  <S>                                   <C>                                     <C>
                  John K. Greene,                       Chicago Horticultural                    Trustee
                  Principal                             Society              
                                                

                                                        Children's Home & Aid Society            Trustee
                                                        of Illinois, Inc.

                                                        Hazelden                                 Chairman Illinois Board of
                                                                                                 Directors

                                                        Vulcan Materials Co.                     Director

                  
                  Thomas L. Greene,                     Tyler School of Secretarial              25% Owner
                  Principal                             Science

                  James P. Hickey,                      Eagle Point Software                     Director
                  Principal

                  Edgar D. Jannotta, Sr.,               AAR Corporation                          Director
                  Senior Principal
                                                        AON Corporation                          Director

                                                        Bandag, Incorporated                     Director

                                                        Commonwealth Edison Company              Director

                                                        Molex, Incorporated                      Director

                                                        New York Stock Exchange, Inc.            Director

                                                        Oil-Dri Corporation of America           Director

                                                        Safety-Kleen Corporation                 Director

                                                        Sloan Valve Company                      Director

                                                        Unicom Corporation                       Director
</TABLE>


                                     C-6


<PAGE>   134

<TABLE> 
<CAPTION>
                  Name and Position with                Name of Company and/or                                                   
                  William Blair & Company, L.L.C.       Principal Business                       Capacity                        
                  ----------------------------------------------------------------------------------------------------------     
                  <S>                                   <C>                                      <C>
                  Edgar D. Jannotta, Jr.,               Big Sky Joint Venture                    General Partner
                  Principal
                                                        The Bruss Company                        Director

                                                        CARA Corporation                         Director

                                                        Chicago Communities in Schools           Director

                                                        Corporate Project                        Director
                                                        Resources, Inc.

                                                        Daisytek International                   Director

                                                        Electronic Manufacturing Services,       Director
                                                        Inc.

                                                        Gibraltar Packaging                      Director

                                                        Greater Chicago Food Depository          Co-Chairman Finance

                                                        GNWC Wire & Cable, Inc.                  Steering Committee

                                                        Midsouth Building Supplies               Director

                                                        Towne Holdings, Inc.                     Director

                  Richard P. Kiphart,                   McCormick Theological Seminary           Board of Directors
                  Principal

                  Robert Lanphier, IV,                  Ag. Med, Inc. (Private)                  Chairman
                  Principal

                  James McMullan,                       Security Industry Association            Director
                  Principal
                                                        William Blair Mutual Funds, Inc.         Director

                  David W. Morrison,                    Bell Flavors & Fragrances, Inc.          Director
                  Principal

                  Timothy M. Murray,                    AGI, Inc.                                Director
                  Principal
                                                        The Bruss Company                        Director

                                                        Daisytek International                   Director

                                                        GNWC Wire & Cable, Inc.                  Director

                                                        Mede America, Inc.                       Director

                                                        MRC Group, Inc.                          Director

                                                        Portland Food Products, Incorporated     Director

                                                        Towne Holdings, Inc.                     Director
                                                                                                         
</TABLE>

                                     C-7





<PAGE>   135

<TABLE>           
<CAPTION>


                  Name and Position with                Name of Company and/or                                                
                  William Blair & Company, L.L.C.       Principal Business                       Capacity                     
                  ----------------------------------------------------------------------------------------------------------  
                  <S>                                   <C>                                      <C>
                  Bentley M. Myer,                      Delnor Community Hospital                Director
                  Principal                             Foundation

                                                        William Blair Mutual Funds, Inc.         Senior Vice President

                  David G. O'Neill,                     Elder Care Information Network           Director
                  Principal

                  Neal L. Seltzer,                      Scholarship and Guidance Foundation      Director
                  Principal

                  Ronald B. Stansell,                   AFO Limited Partnership                  Limited Partner
                  Principal

                  Thomas H. Story,                      Security APL, Inc.                       Member, Advisory Council
                  Principal

                  Mark Timmerman,                       DIY Home Warehouse, Incorporated         Director
                  Principal
                                                        Prophet 21, Incorporated
                                                                                                 Director

                  Norbert W. Truderung,                 William Blair Mutual Funds, Inc.         Senior Vice President
                  Principal

                  W. James Truettner, Jr.,              Glenview Foundation                      Director
                  Principal
                                                        International Travel Services            Director

                                                        Roberts Industries                       Director

                                                        William Blair Mutual Funds, Inc.         Senior Vice President and
                                                                                                 Director
</TABLE>


                                     C-8


<PAGE>   136

ITEM 29.         Principal Underwriters

                 (a)      Inapplicable.

                 (b)      The principal business address of each principal and
                          officer of William Blair & Company, L.L.C., principal
                          underwriter for Registrant, is 222 West Adams Street,
                          Chicago, Illinois 60606.  See Item 28 for information
                          with respect to officers and principals of William
                          Blair & Company, L.L.C.

                 (c)      Inapplicable.

ITEM 30.         Location of Accounts and Records

                 All such accounts, books and other documents are maintained by
the Registrant's officers at the offices of the Registrant and the offices of
the Investment Adviser, William Blair & Company, L.L.C., 222 West Adams Street,
Chicago, Illinois 60606.  Shareholder account information and original
shareholder correspondence is also available at the offices of the Transfer
Agent and Dividend Paying Agent, State Street Bank and Trust Company, P.O. Box
9104, Boston, Massachusetts  02205-9104.

ITEM 31.         Management Services

                 Inapplicable.

ITEM 32.         Undertakings

                 (a)      Inapplicable.
   
                 (b)      Inapplicable.
    
                 (c)      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.


                                     C-9


<PAGE>   137

                                   SIGNATURES
   
Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, the registrant has duly caused this amended 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 13th day of
June, 1997.
    
                                             WILLIAM BLAIR MUTUAL FUNDS, INC.


                                             By:/s/James L. Barber, Jr.      
                                                -----------------------------
                                                James L. Barber, Jr., President


Pursuant to the requirements of the Securities Act of 1933, this post-effective
amendment to the registration statement has been signed below by the following
persons in the capacity and on the date indicated.


<TABLE>
<CAPTION>
Signature                                      Title                              Date
- ---------                                      -----                              ----
<S>                                            <C>                                <C>
   
/s/Vernon Armour                               Director                           June 13, 1997
- -------------------------                                                                      
Vernon Armour


/s/Ann P. McDermott                            Director                           June 13, 1997
- -------------------------                                                                       
Ann P. McDermott


/s/Conrad Fischer                              Director (Chairman of              June 13, 1997
- -------------------------                      the Board)                                        
Conrad Fischer                                            


/s/George Kelm                                 Director                           June 13, 1997
- -------------------------                                                                         
George Kelm


/s/James M. McMullan                           Director                           June 13, 1997
- -------------------------                                                                        
James M. McMullan


/s/John B. Schwemm                             Director                           June 13, 1997
- -------------------------                                                                       
John B. Schwemm


/s/W. James Truettner, Jr.                     Director                           June 13, 1997
- -------------------------                                                                      
W. James Truettner, Jr.


    
</TABLE>





<PAGE>   138

<TABLE>
<CAPTION>
   
Signature                                                  Title                                      Date
- ---------                                                  -----                                      ----
<S>                                                <C>                                            <C>      
/s/James L. Barber, Jr.                              President (Principal                          June 13, 1997
- -------------------------                            Executive Officer)                              
James L. Barber, Jr.                                                

/s/Terence M. Sullivan                               Treasurer (Principal                          June 13, 1997
- -----------------------                              Financial Officer 
Terence M. Sullivan                                  Principal
                                                     Accounting Officer)
                                                                    
    

</TABLE>





<PAGE>   139

                                 EXHIBIT INDEX
   
<TABLE>
<CAPTION>
<S>              <C>
99.B.1   a.      Articles of Incorporation.(1)
99.B.1   b.      Form of Amendment to Articles of Incorporation.(1)
99.B.2           By-laws, as amended.(1)
99.B.3           Inapplicable
99.B.4           See items 1 and 2 above.
99.B.5   a.      Form of Management Agreement dated May 1, 1996, as amended.(3)
99.B.5   b.      Form of Management Agreement dated December 23, 1996.(2)
99.B.6           Underwriting Agreement.(1)
99.B.7           Inapplicable.
99.B.8           Custodian Agreement.(1)
99.B.9           Inapplicable.
99.B.10          Inapplicable.
99.B.11          Consent of Ernst & Young LLP.*
99.B.12          Inapplicable.
99.B.13          Subscription Agreement.(1)
99.B.14          Inapplicable.
99.B.15          Inapplicable.
99.B.16          Schedule for calculation of performance quotation.(1)
    27           Financial Data Schedule.*
99.B.18          Inapplicable.
99.485(b)        Representation of Counsel (Rule 485(b)).*
- ---------------------                                              
</TABLE>

(1)      Incorporated herein by reference to Post-Effective Amendment No. 13 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about March 1, 1996.

(2)      Incorporated herein by reference to Post-Effective Amendment No. 15 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about November 5, 1996.

(3)      Incorporated herein by reference to Post-Effective Amendment No. 15 to
         Registrant's Registration Statement on Form N-1A as filed on or
         about November 5, 1996.

*        Filed Herewith.

    




<PAGE>   1

                                                                 EXHIBIT 99.B.11

                        CONSENT OF INDEPENDENT AUDITORS


We consent to the reference to our firm under the captions "Financial
Highlights" and "Independent Auditors" and to the use of our report dated
February 3, 1997 with respect to William Blair Mutual Funds, Inc. (comprised of
Growth Fund, Value Discovery Fund, International Growth Fund, Income Fund, and
Ready Reserved Fund) in the Registration Statement (Form N-1A) of William Blair
Mutual Funds, Inc., and its incorporation by reference in the related
Prospectus and Statement of Additional Information, filed with the Securities
and Exchange Commission in this Post- Effective Amendment No. 17 to the
Registration Statement under the Securities Act of 1933 (Registration No.
33-17463) and this Amendment No. 18 to the Registration Statement under the
Investment Company Act of 1940 (Registration No. 811-5344).


                                                     /s/Ernst & Young LLP
                                                     ERNST & YOUNG LLP

Chicago, Illinois
June 13, 1997






<PAGE>   1

                                                          EXHIBIT 99.485(b)
                           [VEDDER PRICE LETTERHEAD]

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549

         RE:  William Blair Mutual Funds - Value Discovery Fund

To the Commission:

         We are counsel to the above-referenced investment company (the "Fund")
and as such have participated in the preparation and review of Post-Effective
Amendment No. 17 to the Fund's registration statement being filed pursuant to
Rule 485(b) under the Securities Act of 1933.  In accordance with paragraph
(b)(4) of Rule 485, we hereby represent that such amendment does not contain
disclosures which would render it ineligible to become effective pursuant to
paragraph (b) thereof.

                                        Very truly yours,

                                        /s/ VEDDER, PRICE, KAUFMAN & KAMMHOLZ
                                            VEDDER, PRICE, KAUFMAN & KAMMHOLZ






<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 5
   <NAME> VALUE DISCOVERY FUND
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               MAY-31-1997
<INVESTMENTS-AT-COST>                           13,398
<INVESTMENTS-AT-VALUE>                          14,561
<RECEIVABLES>                                    4,892
<ASSETS-OTHER>                                      37
<OTHER-ITEMS-ASSETS>                                00
<TOTAL-ASSETS>                                  19,510
<PAYABLE-FOR-SECURITIES>                           545
<SENIOR-LONG-TERM-DEBT>                             00
<OTHER-ITEMS-LIABILITIES>                          126
<TOTAL-LIABILITIES>                                671
<SENIOR-EQUITY>                                     00
<PAID-IN-CAPITAL-COMMON>                        17,815
<SHARES-COMMON-STOCK>                            1,769
<SHARES-COMMON-PRIOR>                              218
<ACCUMULATED-NII-CURRENT>                           75
<OVERDISTRIBUTION-NII>                              00
<ACCUMULATED-NET-GAINS>                          (214)
<OVERDISTRIBUTION-GAINS>                            00
<ACCUM-APPREC-OR-DEPREC>                            00
<NET-ASSETS>                                    18,839
<DIVIDEND-INCOME>                                   33
<INTEREST-INCOME>                                  133
<OTHER-INCOME>                                      00
<EXPENSES-NET>                                      91
<NET-INVESTMENT-INCOME>                             75
<REALIZED-GAINS-CURRENT>                         (214)
<APPREC-INCREASE-CURRENT>                        1,163
<NET-CHANGE-FROM-OPS>                            1,024
<EQUALIZATION>                                      00
<DISTRIBUTIONS-OF-INCOME>                           00
<DISTRIBUTIONS-OF-GAINS>                            00
<DISTRIBUTIONS-OTHER>                               00
<NUMBER-OF-SHARES-SOLD>                          1,585
<NUMBER-OF-SHARES-REDEEMED>                         33
<SHARES-REINVESTED>                                 00
<NET-CHANGE-IN-ASSETS>                          16,664
<ACCUMULATED-NII-PRIOR>                             00
<ACCUMULATED-GAINS-PRIOR>                           00
<OVERDISTRIB-NII-PRIOR>                             00
<OVERDIST-NET-GAINS-PRIOR>                          00
<GROSS-ADVISORY-FEES>                               70
<INTEREST-EXPENSE>                                  00
<GROSS-EXPENSE>                                     91
<AVERAGE-NET-ASSETS>                            14,630
<PER-SHARE-NAV-BEGIN>                           10.000
<PER-SHARE-NII>                                   .040
<PER-SHARE-GAIN-APPREC>                           .450
<PER-SHARE-DIVIDEND>                                00
<PER-SHARE-DISTRIBUTIONS>                           00
<RETURNS-OF-CAPITAL>                                00
<PER-SHARE-NAV-END>                             10.490
<EXPENSE-RATIO>                                   1.50
<AVG-DEBT-OUTSTANDING>                              00
<AVG-DEBT-PER-SHARE>                                00
        


</TABLE>


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