=========================================================================== SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 26, 2000 AMBAC FINANCIAL GROUP, INC. (Exact name of Registrant as specified in its charter) Delaware 1-10777 13-3621676 (State of incorporation) (Commission file number) (I.R.S. employer identification no.) One State Street Plaza 10004 New York, New York (Zip code) (Address of principal executive offices) (212) 668-0340 (Registrant's telephone number, including area code) Page 1 of 15 Pages =========================================================================== Index to Exhibits on Page 4 Item 5. Other Events On January 26, 2000, Ambac Financial Group, Inc. (the "Registrant") issued a press release containing unaudited interim financial information and accompanying discussion for the 1999 fourth quarter and full-year earnings. Exhibit 99.05 is a copy of such press release and is incorporated herein by reference. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits (c) Exhibits. Exhibit Number Item -------------- ---- 99.05 Unaudited interim financial statements and accompanying discussion for the three months ended December 31, 1999 and the year ended December 31, 1999 contained in the press release issued by the Registrant on January 26, 2000. Page 2 of 15 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Ambac Financial Group, Inc. (Registrant) Dated: January 27, 2000 By: /s/ Frank J. Bivona ------------------- Frank J. Bivona Executive Vice President and Chief Financial Officer Page 3 of 15 INDEX TO EXHIBITS ----------------- Exhibit - ------- Number Description of Exhibit - ------ ---------------------- 99.05 Unaudited interim financial statements and accompanying discussion for the three months ended December 31, 1999 and the year ended December 31, 1999 contained in the press release issued by the Registrant on January 26, 2000. Page 4 of 15