================================================================================ 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): March 21, 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 6 Pages ================================================================================ Index to Exhibits on Page 4 Item 5. Other Events On March 21, 2000, Ambac Financial Group, Inc. (the "Registrant") issued a press release announcing that the Registrant and MBIA Inc. had decided to restructure their international joint venture. Exhibit 99.07 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 -------------- ---- 99.07 Press Release announcing that Ambac and MBIA are restructuring their International Joint Venture. Page 2 of 6 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: March 22, 2000 By: /s/ Frank J. Bivona ---------------------------------- Frank J. Bivona Executive Vice President and Chief Financial Officer Page 3 of 6 INDEX TO EXHIBITS ----------------- Exhibit - ------- Number Description of Exhibit - ------ ---------------------- 99.07 Release announcing that Ambac and MBIA are restructuring their International Joint Venture. Page 4 of 6