<PAGE>
Numeric Investors L.P.
n/i numeric investors Micro Cap Fund
n/i numeric investors Growth Fund
n/i numeric investors Growth & Value Fund
n/i numeric investors Larger Cap Value Fund
n/i numeric investors Small Cap Value Fund
(Investment Portfolios of The RBB Fund, Inc.)
Supplement dated October 26, 1999
to Prospectus dated December 28, 1998
The description of the investment adviser on page 14 of the Prospectus is
amended as follows:
All investment decisions with respect to the Funds are made by a team of
Numeric's Portfolio Management Department, which is subject to the supervision
of Langdon B. Wheeler. Mr. Wheeler is the founder, President and Chief
Investment Officer of Numeric Investors L.P.(R). Mr. Wheeler received his MBA
from Harvard University and an undergraduate degree from Yale University. No one
person is responsible for making recommendations to that team.
