VANGUARD HORIZON FUND INC, 497, 2000-06-30

VANGUARD HORIZON FUND INC
497, 2000-06-30

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                                     [SHIP]
                            [THE VANGUARD GROUP LOGO]

                       VANGUARD(R) AGGRESSIVE GROWTH FUND
              SUPPLEMENT TO THE PROSPECTUS DATED FEBRUARY 18, 2000


NAME CHANGE
Effective  August 1,  2000,  Vanguard  Aggressive  Growth  Fund will be  renamed
Vanguard(R)  Strategic  Equity Fund. The new name more  accurately  reflects the
stated objective and investment approach of the Fund. The investment  objective,
strategies, and adviser of the Fund will remain the same.

(C)2000 The Vanguard Group, Inc. All rights reserved.
Vanguard Marketing Corporation, Distributor.                       PS114N-072000