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): August 9, 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) 4902 N. Biltmore Lane, Madison, Wisconsin 53718 ----------------------------------------------------------- (Address of principal executive offices, including zip code) (608) 458-3311 ------------------------------- (Registrant's telephone number) Item 7. Financial Statements and Exhibits. ------ --------------------------------- (a) Not applicable. (b) Not applicable. (c) Exhibits. The following exhibits are being filed herewith: -------- (99.1) Statement Under Oath of Principal Executive Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002. (99.2) Statement Under Oath of Principal Financial Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002. Item 9. Regulation FD Disclosure. ------ ------------------------ On August 9, 2002, pursuant to Securities Exchange Commission ("SEC") Order No. 4-460, Erroll B. Davis, Jr., the principal executive officer of Alliant Energy Corporation (the "Company"), filed with the SEC a Statement Under Oath of Principle Executive Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002, and Thomas M. Walker, the principal financial officer of the Company, filed with the SEC a Statement Under Oath of Principle Financial Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002. The officers executed such statements in the exact form of Exhibit A to the Order. The Company is filing copies of such statements in the form in which such officers executed them as Exhibits 99.1 and 99.2, which are incorporated by reference herein. 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: August 9, 2002 By: /s/ John E. Kratchmer ------------------------------- John E. Kratchmer Corporate Controller and Chief Accounting Officer 3 ALLIANT ENERGY CORPORATION Exhibit Index to Current Report on Form 8-K Dated August 9, 2002 Exhibit Number ------ (99.1) Statement Under Oath of Principal Executive Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002. (99.2) Statement Under Oath of Principal Financial Officer Regarding Facts and Circumstances Relating to Exchange Act Filings dated August 9, 2002. 4