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): June 4, 2003 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 North Biltmore Lane, Madison, Wisconsin 53718 ------------------------------------------------------------ (Address of principal executive offices, including zip code) (608) 458-3311 ------------------------------- (Registrant's telephone number) Item 5. Other Events. Alliant Energy Corporation ("Alliant Energy") files this Form 8-K Current Report for the purpose of filing the exhibits listed in Item 7 in anticipation of filing an amendment to Alliant Energy's Form S-3 Registration Statement (Reg. No. 333-104269). Exhibits 99(a) through 99(d) contain information identical to the corresponding sections of Alliant Energy's Form 10-K Annual Report for the year ended December 31, 2002, except that all such information has been updated to the extent required to report energy trading contracts on a net rather than gross basis in the income statement for all periods presented as a result of adopting Emerging Issues Task Force Issue 02-3, "Issues Involved in Accounting for Derivative Contracts Held for Trading Purposes and Contracts Involved in Energy Trading and Risk Management Activities," and the impact of separately classifying and reporting SmartEnergy, Inc. as a discontinued operation and asset held for sale based on Alliant Energy's January 2003 decision to sell SmartEnergy, Inc. as further discussed in Notes 1, 10(d) and 16 of the "Notes to Consolidated Financial Statements." Certain amounts have also been reclassified consistent with the 2003 presentation. The following are defined terms used in the Exhibits: Abbreviation or Acronym Definition ----------------------- ---------- AFUDC Allowance for Funds Used During Construction Alliant Energy Alliant Energy Corporation APB Accounting Principles Board Opinion ATC American Transmission Company LLC CAA Clean Air Act Cargill Cargill Incorporated Cargill-Alliant Cargill-Alliant, LLC Corporate Services Alliant Energy Corporate Services, Inc. DAEC Duane Arnold Energy Center DNR Department of Natural Resources Dth Dekatherm EAC Energy Adjustment Clause EBITDA Earnings Before Interest, Taxes, Depreciation and Amortization EIP 2002 Equity Incentive Plan EITF Emerging Issues Task Force EITF Issue 02-3 Issues Involved in Accounting for Derivative Contracts Held for Trading Purposes and Contracts Involved in Energy Trading and Risk Management Activities EITF Issue 98-10 Accounting for Contracts Involved in Energy Trading and Risk Management Activities Enermetrix Enermetrix, Inc. EPA U.S. Environmental Protection Agency EPS Earnings Per Average Common Share FASB Financial Accounting Standards Board FERC Federal Energy Regulatory Commission FIN FASB Interpretation No. FIN 45 Guarantor's Accounting and Disclosure Requirements for Guarantees, Including Indirect Guarantees of Indebtedness to Others FIN 46 Consolidation of Variable Interest Entities FUCO Foreign Utility Company GAAP Accounting Principles Generally Accepted in the U.S. IESU IES Utilities Inc. Integrated Services Alliant Energy Integrated Services Company International Alliant Energy International, Inc. Investments Alliant Energy Investments, Inc. IPC Interstate Power Company IP&L Interstate Power and Light Company IRS Internal Revenue Service IUB Iowa Utilities Board Kewaunee Kewaunee Nuclear Power Plant KWh Kilowatt-hour LTEIP Long-Term Equity Incentive Plan MAIN Mid-America Interconnected Network, Inc. 1 Abbreviation or Acronym Definition ----------------------- ---------- MAPP Mid-Continent Area Power Pool McLeod McLeodUSA Incorporated MD&A Management's Discussion and Analysis of Financial Condition and Results of Operations MGP Manufactured Gas Plants Moody's Moody's Investors Service MPUC Minnesota Public Utilities Commission MW Megawatt MWh Megawatt-hour NEPA National Energy Policy Act of 1992 NRC Nuclear Regulatory Commission PSCW Public Service Commission of Wisconsin PUHCA Public Utility Holding Company Act of 1935 Resources Alliant Energy Resources, Inc. SEC Securities and Exchange Commission SFAS Statement of Financial Accounting Standards SFAS 115 Accounting for Certain Investments in Debt and Equity Securities SFAS 133 Accounting for Derivative Instruments and Hedging Activities SFAS 143 Accounting for Asset Retirement Obligations SmartEnergy SmartEnergy, Inc. South Beloit South Beloit Water, Gas and Electric Company Southern Hydro Southern Hydro Partnership Synfuel Alliant Energy Synfuel LLC TBD To Be Determined Transportation Alliant Energy Transportation, Inc. U.S. United States of America Whiting Whiting Petroleum Corporation WP&L Wisconsin Power and Light Company 2 Item 7. Financial Statements and Exhibits. (c) Exhibits 23(a) Independent Auditors' Consent 99(a) Selected Financial Data 99(b) Management's Discussion and Analysis of Financial Condition and Results of Operations 99(c) Consolidated Financial Statements: Independent Auditors' Report Consolidated Statements of Income for the Years Ended December 31, 2002, 2001 and 2000 Consolidated Balance Sheets as of December 31, 2002 and 2001 Consolidated Statements of Cash Flows for the Years Ended December 31, 2002, 2001 and 2000 Consolidated Statements of Capitalization as of December 31, 2002 and 2001 Consolidated Statements of Changes in Common Equity for the Years Ended December 31, 2002, 2001 and 2000 Notes to Consolidated Financial Statements 99(d) Consolidated Financial Statement Schedule II--Valuation and Qualifying Accounts and Reserves for the Years Ended December 31, 2002, 2001 and 2000 3 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: June 4, 2003 By: /s/ John E. Kratchmer --------------------- John E. Kratchmer Vice President-Controller and Chief Accounting Officer 4 ALLIANT ENERGY CORPORATION Exhibit Index to Current Report on Form 8-K Dated June 4, 2003 Exhibit Number 23(a) Independent Auditors' Consent 99(a) Selected Financial Data 99(b) Management's Discussion and Analysis of Financial Condition and Results of Operations 99(c) Consolidated Financial Statements: Independent Auditors' Report Consolidated Statements of Income for the Years Ended December 31, 2002, 2001 and 2000 Consolidated Balance Sheets as of December 31, 2002 and 2001 Consolidated Statements of Cash Flows for the Years Ended December 31, 2002, 2001 and 2000 Consolidated Statements of Capitalization as of December 31, 2002 and 2001 Consolidated Statements of Changes in Common Equity for the Years Ended December 31, 2002, 2001 and 2000 Notes to Consolidated Financial Statements 99(d) Consolidated Financial Statement Schedule II--Valuation and Qualifying Accounts and Reserves for the Years Ended December 31, 2002, 2001 and 2000 5