497 1 gibpsfbony060605.txt 497 Prudential's Gibraltar Fund The Prudential Series Fund, Inc. Supplement dated June 6, 2005 to the Statements of Additional Information (SAI) of the Funds listed below. The Bank of New York (BNY), located at One Wall Street, New York, New York 10286, will serve as custodian for each Fund's portfolio securities and cash, and in that capacity will maintain certain financial and accounting books and records pursuant to an agreement with the applicable Fund, beginning on the dates specified below. These effective dates may vary for any Fund if circumstances require. Subcustodians will continue to provide custodial services for each Fund's foreign assets held outside the United States. Name of Fund Effective Date SAI Date Prudential's Gibraltar Fund July 25, 2005 May 1, 2005 The Prudential Series Fund, Inc. May 1, 2005 Conservative Balanced Portfolio July 25, 2005 Diversified Bond Portfolio July 25, 2005 Flexible Managed Portfolio July 25, 2005 Global Portfolio July 25, 2005 Government Income Portfolio July 25, 2005 High Yield Bond Portfolio July 25, 2005 Jennison 20/20 Focus Portfolio July 25, 2005 Jennison Portfolio July 25, 2005 Money Market Portfolio September 12, 2005 Natural Resources Portfolio July 25, 2005 Small Capitalization Stock Portfolio July 25, 2005 Strategic Partners Aggressive Growth Asset Allocation Portfolio September 12, 2005 Strategic Partners Balanced Asset Allocation Portfolio September 12, 2005 Strategic Partners Conservative Asset Allocation Portfolio September 12, 2005 Strategic Partners Growth Asset Allocation Portfolio September 12, 2005 Prudential U.S. Emerging Growth Portfolio July 25, 2005 Stock Index Portfolio July 25, 2005 Value Portfolio July 25, 2005 PSFSAISUP1