<PAGE> 1
William Blair Mutual Funds, Inc.
24 f (2)
December 31, 1998
-----------------
<TABLE>
<CAPTION>
Year from
1/1/98 to 12/31/98
------------------
<S> <C> <C>
REGISTRATION NO. 33-17463
Pursuant to paragraph ( c ) of Rule 24f-2, the
filing fees accompanying this notice
were calculated in ten following manner:
(a) The actual sales price of Fund shares
sold and reinvested during the fiscal year. $4,258,308,489
(b) Reduced by:
( 1 ) The actual sales price of Fund sold in
private placement to the Adviser pursuant to
an investment letterto. 0
( 2 ) The difference between:
( i ) the actual aggregate redemption price of
Fund shares redeemed during the fiscal year,
(if filed before March 1); and 3,883,715,287
( ii ) the actual agregate redemption price of such
redeemed shares previoulsy applied pursuant to
Rule 24e-2(a) under Section 24 (e) (1) of the
Securities Act of 1933.
Step (b) results $ 374,593,202
==============
(c) Registration fee pursuant to Section 6(b) of
the Securities Act of 1933 (either one -
twenty-seven. Eight% or the minimum fee of $100).
</TABLE>
<PAGE> 2
William Blair Mutual Funds, Inc.
24 f (2)
December 31, 1998
-----------------
<TABLE>
<CAPTION>
Year Ended December 31, 1998
----------------------------
Sales Shares Amount
----- ------ ------
<S> <C> <C>
Growth Fund 10,367,161 $ 173,605,747
Ready Reserves Fund 3,808,318,090 $3,808,318,090
Income Fund 5,068,634 $ 53,183,171
International Growth Fund 5,983,274 $ 84,365,007
Value Discovery Fund 1,726,629 $ 23,034,712
Emerging Markets Growth Fund 605,605 $ 5,662,332
------------- --------------
3,832,069,393 $4,148,169,059
Reinvestments
-------------
Growth Fund 2,973,936 $ 51,776,169
Ready Reserves Fund 50,013,296 $ 50,013,296
Income Fund 748,506 $ 7,837,155
International Growth Fund 15,730 $ 226,668
Value Discovery Fund 22,782 $ 286,142
Emerging Markets Growth Fund 0 $ 0
------------- --------------
53,774,250 $ 110,139,430
Total sales and reinvestments
-----------------------------
Growth Fund 13,341,097 $ 225,381,916
Ready Reserves Fund 3,858,331,386 $3,858,331,386
Income Fund 5,817,140 $ 61,020,326
International Growth Fund 5,999,004 $ 84,591,675
Value Discovery Fund 1,749,411 $ 23,320,854
Emerging Markets Growth Fund 605,605 $ 5,662,332
------------- --------------
3,885,843,643 $4,258,308,489
============= ==============
</TABLE>
<PAGE> 3
William Blair Mutual Funds, Inc.
24 f (2)
December 31, 1998
-----------------
<TABLE>
<CAPTION>
Year Ended December 31, 1998
----------------------------
Redemptions Shares Amount
----------- ------ ------
<S> <C> <C>
Growth Fund 10,559,763 $ 177,421,587
Ready Reserves Fund 3,573,848,926 $3,573,848,926
Income Fund 3,271,815 $ 34,388,971
International Growth Fund 6,240,079 $ 88,864,567
Value Discovery Fund 642,707 $ 8,305,008
Emerging Markets Growth Fund 113,551 $ 886,228
------- -------
3,594,676,841 $3,883,715,287
Net sales and (redemptions)
---------------------------
Growth Fund 2,781,334 $ 47,960,329
Ready Reserves Fund 284,482,460 $ 284,482,460
Income Fund 2,545,325 $ 26,631,355
International Growth Fund (241,075) ($4,272,892)
Value Discovery Fund 1,106,704 $ 15,015,846
Emerging Markets Growth Fund 492,054 $ 4,776,104
------- ---------
291,166,802 $ 374,593,202
=========== ===========
</TABLE>
<PAGE> 4
William Blair Mutual Funds, Inc.
24 f (2)
December 31, 1998
-----------------
<TABLE>
<CAPTION>
SEC Fee
@.0278%
-----------
<S> <C>
Growth Fund $13,182.47
Ready Reserves Fund $78,194.43
Income Fund $ 7,319.95
International Growth Fund
Value Discovery Fund $ 4,127.29
Emerging Markets Growth Fund $ 1,312.77
-----------
$104,136.91
-----------
</TABLE>