<Page> U.S. 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) April 14, 2003 ------------------- Citigroup Inc. - -------------------------------------------------------------------------------- (Exact name of Registrant as specified in its charter) Delaware 1-9924 52-1568099 --------------- ----------- ------------------- (State or other (Commission (IRS Employer jurisdiction of File Number) Identification No.) incorporation) 399 Park Avenue, New York, New York 10043 - -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip Code) (212) 559-1000 - -------------------------------------------------------------------------------- (Registrant's telephone number, including area code) <Page> Citigroup Inc. Current Report on Form 8-K ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (c) Exhibits. Exhibit Number -------------- 99.1 Press Release, dated April 14, 2003, issued by Citigroup Inc. 99.2 Citigroup Inc. Quarterly Financial Data Supplement for the quarter ended March 31, 2003. ITEM 12. RESULTS OF OPERATIONS AND FINANCIAL CONDITION. On April 14, 2003, Citigroup Inc. announced its results of operations for the quarter ended March 31, 2003. A copy of the related press release is being filed as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference in its entirety. In addition, a copy of the Citigroup Inc. Quarterly Financial Data Supplement for the quarter ended March 31, 2003 is being filed as Exhibit 99.2 to this Form 8-K and is incorporated herein by reference in its entirety. The information furnished under Item 12 of this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2, shall be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended. <Page> SIGNATURE 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 hereunto duly authorized. Dated: April 14, 2003 CITIGROUP INC. By: /s/ William P. Hannon ----------------------------------- Name: William P. Hannon Title: Controller Principal Accounting Officer <Page> EXHIBIT INDEX Exhibit Number - -------------- 99.1 Press Release, dated April 14, 2003, issued by Citigroup Inc. 99.2 Citigroup Inc. Quarterly Financial Data Supplement for the quarter ended March 31, 2003.