UNITED STATES 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 29, 2002 Alliant Energy Corporation ------------------------------------------------------ (Exact name of registrant as specified in its charter) Wisconsin 1-9894 39-1380265 --------------- ---------------- ------------------- (State or other (Commission File (IRS Employer jurisdiction of Number) Identification No.) incorporation) 222 West Washington Avenue, Madison, Wisconsin 53703 ------------------------------------------------------------ (Address of principal executive offices, including zip code) (608) 252-3311 ------------------------------- (Registrant's telephone number) Item 5. Other Events. ------ ------------ On January 29, 2002, Alliant Energy Corporation issued a press release announcing its earnings for the fourth quarter and year ended December 31, 2001. A copy of such press release is filed as Exhibit 99.1 and is incorporated by reference herein. Item 7. Financial Statements and Exhibits. ------ --------------------------------- (a) Not applicable. (b) Not applicable. (c) Exhibits. The following exhibit is being filed herewith: -------- (99.1) Alliant Energy Corporation Press Release dated January 29, 2002. 2 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 hereunto duly authorized. ALLIANT ENERGY CORPORATION Date: January 29, 2002 By: ------------------------------ John E. Kratchmer Corporate Controller and Chief Accounting Officer 3 ALLIANT ENERGY CORPORATION Exhibit Index to Current Report on Form 8-K Dated January 29, 2002 Exhibit Number ------ (99.1) Alliant Energy Corporation Press Release dated January 29, 2002. 4