Filed by: Prudential plc Pursuant to Rule 425 under the Securities Act of 1933 Subject Company: American General Corporation Exchange Act Commission File No: 001-07981 Proxy statement/prospectus Prudential plc and American General Corporation will be filing a proxy statement/prospectus and other relevant documents concerning the proposed transaction with the SEC. INVESTORS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ON THE PROPOSED TRANSACTION. Investors will be able to obtain the document free of charge at the SEC's website (www.sec.gov). In addition, the proxy statement/prospectus and other relevant documents concerning the proposed transaction and filed with the SEC may be obtained free of charge by contacting Prudential plc, Laurence Pountney Hill, London EC4R 0HH, England, Attention: Investor Relations (tel: (44 20) 7548 3537), and American General Corporation, 2929 Allen Parkway, Houston, Texas, 77019, Attention: Investor Relations (tel: (713) 522-1111). The following press release was issued by Prudential plc on April 4, 2001. FOR IMMEDIATE RELEASE 4 APRIL 2001 LONDON, UK -- Prudential plc has reviewed American International Group, Inc.'s press release regarding its proposal to the American General Corporation Board of Directors. Prudential notes that its merger agreement with American General remains in full force and effect. Prudential has no further comment at this time. ENQUIRIES: Rebecca Burrows (Investors) +44 20 7548 3537 Geraldine Davies (Media) +44 20 7548 3911 Prudential plc and American General Corporation will be filing a proxy statement/prospectus and other relevant documents concerning the proposed transaction with the SEC. INVESTORS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS WHEN IT BECOMES AVAILABLE AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ON THE PROPOSED TRANSACTION. Investors will be able to obtain the document free of charge at the SEC's website (www.sec.gov). In addition, the proxy statement/prospectus and other relevant documents concerning the proposed transaction and filed with the SEC may be obtained free of charge by contacting Prudential plc, Laurence Pountney Hill, London EC4R 0HH, England, Attention: Investor Relations (tel: (44 20) 7548 3537), and American General Corporation, 2929 Allen Parkway, Houston, Texas, 77019, Attention: Investor Relations (tel: (713) 522-1111).