<PAGE>
LOOMIS SAYLES FUNDS
SUPPLEMENT DATED OCTOBER 2, 2000 TO
LOOMIS SAYLES EQUITY FUNDS PROSPECTUS
DATED FEBRUARY 1, 2000, AS REVISED AUGUST 1, 2000
AND THE LOOMIS SAYLES FIXED INCOME FUNDS
PROSPECTUS DATED FEBRUARY 1, 2000
Effective immediately, the Retail Class shares of Loomis Sayles Core Value Fund,
Loomis Sayles Intermediate Maturity Bond Fund, Loomis Sayles Investment Grade
Bond Fund, Loomis Sayles Short-Term Bond Fund, and Loomis Sayles Worldwide Fund
(the "Funds") will no longer be available for purchase. It is expected that on
or about December 18, 2000, the outstanding Retail Class shares of the Funds
will be automatically converted into Institutional Class shares of the Funds
having the same aggregate net asset value as the shares converted.
