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                          VANGUARD/PRIMECAP FUND, INC.
                             PROSPECTUS SUPPLEMENT

                                OCTOBER 18, 1996


Beginning on October 31, 1996, shares of Vanguard/PRIMECAP Fund, Inc.
(the "Fund") will be available for purchase by all investors. The minimum
initial investment is $3,000 ($1,000 for IRAs and custodial accounts for
minors).  The Fund's Board of Directors may discontinue or limit the offering
of shares, or the Board may impose transaction fees on future purchases or
redemptions of shares, if such an action is determined by the Directors to be
in the best interests of shareholders.









                                                                            PS59



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