UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM U-9C-3 QUARTERLY REPORT For the quarter ended December 31, 2004 Filed Pursuant to Rule 58 of the Public Utility Holding Company Act of 1935 ALLIANT ENERGY CORPORATION 4902 N. Biltmore Lane Madison, Wisconsin 53718-2132 608-458-3311 ALLIANT ENERGY CORPORATION FORM U-9C-3 For the Quarter Ended December 31, 2004 CONTENTS Page ITEM 1 - Organization Chart 3 ITEM 2 - Issuances and Renewals of Securities and Capital Contributions 3 ITEM 3 - Associate Transactions 4 ITEM 4 - Summary of Aggregate Investment 5 ITEM 5 - Other Investments 6 ITEM 6 - Financial Statements and Exhibits 6 SIGNATURES 6 EXHIBIT A 7 2 ITEM 1 - ORGANIZATION CHART Omitted for the fourth quarter pursuant to instructions for "Item 1." ITEM 2 - ISSUANCES AND RENEWALS OF SECURITIES AND CAPITAL CONTRIBUTIONS: Investment level at December 31, 2004 ------------------------------------------ ---------------------- -------------- --------------------------------------------- Principal Company Type of Amount of Person to Issuing Security Security Whom Security was Issued Security Issued (in thousands) (1) ------------------------------------------ ---------------------- -------------- --------------------------------------------- ADI Thermal Power Corporation Common stock $200 Alliant Energy Resources, Inc. Alliant Energy Desdemona, LP Partnership capital $1,124 Industrial Energy Applications Delaware, Inc. Partnership capital $1 Alliant Energy Field Services, LLC Alliant South Texas Pipeline, LP Partnership capital $3,902 Industrial Energy Applications Delaware, Inc. Partnership capital $6 Alliant Energy Field Services, LLC BFC Gas Company LLC Capital $1,975 Industrial Energy Applications, Inc. CellTech Power, Inc. Series A preferred stock $252 Alliant Energy Resources, Inc. Cogenex Corporation (Incl. subsidiaries) Money pool borrowings $84,995 Alliant Energy Resources, Inc. Dais Analytic Corporation Common stock $90 Wisconsin Power and Light Company Distributed Energy Systems Corp. Common stock $2 AER Holding Company Distribution Vision 2010, LLC Capital $150 Alliant Energy Corporation Energy Performance Services, Inc. Money pool borrowings $14,727 Alliant Energy Resources, Inc. Heartland Energy Group, Inc. Common stock $5,011 Alliant Energy Integrated Services Company Money pool borrowings $2,227 Alliant Energy Resources, Inc. Industrial Energy Applications, Inc. Common stock $21,060 Alliant Energy Integrated Services Company Money pool borrowings $18,670 Alliant Energy Resources, Inc. New River Synfuel LLC Capital $63,731 Alpha Synfuel LLC Nth Power Technologies Fund II, LP Partnership capital $8,500 Alliant Energy Resources, Inc. Oak Hill Pipeline LP Partnership capital $849 Industrial Energy Applications Delaware, Inc. ReGENco LLC Class A units $1,083 Heartland Energy Services, Inc. RMT, Inc. (2) Common stock $11,822 Alliant Energy Integrated Services Company STM Power, Inc. Series B preferred stock $2,500 Alliant Energy Resources, Inc. TRANSLink Development Company LLC Capital $288 Alliant Energy TransCo LLC Loan $2,196 Alliant Energy TransCo LLC Williams Bulk Transfer Inc. Common stock $3,001 Alliant Energy Transportation, Inc. Money pool borrowings $1,421 Alliant Energy Resources, Inc. ------------------------------------------ ---------------------- -------------- --------------------------------------------- (1) Associate companies. (2) Includes RMT, Inc.; RMT North Carolina, Inc.; RMT, Inc., Michigan; and RMT International, Inc. 3 ITEM 3 - ASSOCIATE TRANSACTIONS For the Quarter Ended December 31, 2004 Part I -- Transactions performed by reporting companies on behalf of associate companies (a): ------------------------------------------------------------------------------------------------------------------------------ Reporting Associate Direct Indirect Total Company Company Types of Costs Costs Cost of Amount Rendering Receiving Services Charged Charged Capital Billed Services Services Rendered (in thousands) (in thousands) (in thousands) (in thousands) ------------------------------------------------------------------------------------------------------------------------------ RMT WP&L Environmental consulting $1,332 $- - $1,332 RMT IEA Environmental consulting 89 - - 89 RMT IP&L Environmental consulting 493 - - 493 RMT Resources Environmental consulting 58 - - 58 RMT Barge Environmental consulting 10 - - 10 RMT AEG Environmental consulting 13 - - 13 RMT AE EPC Environmental consulting 5 - - 5 ReGENco IP&L Integrated turbine & generator services 5 - - 5 ReGENco WP&L Integrated turbine & generator services 10 - - 10 ReGENco AEG Storage lease, handling & maintenance 127 - - 127 ------------------------------------------------------------------------------------------------------------------------------ Part II -- Transactions performed by associate companies on behalf of reporting companies (a): ------------------------------------------------------------------------------------------------------------------------- Associate Reporting Direct Indirect Total Company Company Types of Costs Costs Cost of Amount Rendering Receiving Services Charged Charged Capital Billed Services Services Rendered (in thousands) (in thousands) (in thousands) (in thousands) ------------------------------------------------------------------------------------------------------------------------- RMT IEA Environmental consulting $89 $- $- $89 RMT AE EPC Environmental consulting 5 - - 5 ------------------------------------------------------------------------------------------------------------------------- (a) The following abbreviations were used: ------------- ---------------------------------- ------------ ---------------------------------- Abbreviation Legal Name Abbreviation Legal Name ------------- ---------------------------------- ------------ ---------------------------------- AE EPC Alliant Energy EPC, LLC ReGENco ReGENco LLC AEG AEG Worldwide, Inc. Resources Alliant Energy Resources, Inc. Barge IEI Barge Services, Inc. RMT RMT, Inc. IEA Industrial Energy Applications,Inc. WP&L Wisconsin Power and Light Company IP&L Interstate Power and Light Company ------------- ---------------------------------- ------------ ---------------------------------- 4 ITEM 4 - SUMMARY OF AGGREGATE INVESTMENT (Dollars in thousands) Investments in energy-related companies: ----------------------------------------------------------------------------------------------------- Total consolidated capitalization as of December 31, 2004 (a) $5,348,000 Line 1 ----------------------------------------------------------------------------------------------------- Total capitalization multiplied by 15% (Line 1 multiplied by 0.15) 802,200 Line 2 ----------------------------------------------------------------------------------------------------- Greater of $50 million or total capitalization multiplied by 15% (Line 2) 802,200 Line 3 ----------------------------------------------------------------------------------------------------- Total current aggregate investment subsequent to April 21, 1998 (categorized by major line of energy-related business): Energy-related business category i 99,722 Energy-related business category ii 13,044 Energy-related business category iii - Energy-related business category iv - Energy-related business category v 3,949 Energy-related business category vi 72,395 Energy-related business category vii 5,384 Energy-related business category viii 20,918 (b) Energy-related business category ix 9,454 Energy-related business category x - __________ Total current aggregate investment 224,866 Line 4 ----------------------------------------------------------------------------------------------------- Difference between the greater of $50 million or 15% of capitalization and the total aggregate investment of the registered holding company system (Line 3 less Line 4) $577,334 Line 5 ----------------------------------------------------------------------------------------------------- Investments in gas-related companies: ---------------------------------------------------------------- Total current aggregate investment (categorized by major line of gas-related business): Gas-related business category i $- Gas-related business category ii - ---------------- Total current aggregate investment $- ---------------------------------------------------------------- (a) Includes common equity, cumulative preferred stock of subsidiaries, long-term debt, current maturities and sinking funds and short-term debt (variable rate demand bonds, commercial paper and other short-term borrowings). (b) Represents $20,918,000 of payments to purchase generation equipment that Alliant Energy intends to use to develop a qualifying facility. 5 ITEM 5 - OTHER INVESTMENTS (Dollars in thousands) ----------------------------------------- ----------- -------------- -------------------------------------------------- Other Investment Other Major Line Of In Last Investment Energy-Related U-9C-3 In This Reason for Difference Business Report U-9C-3 Report In Other Investment ----------------------------------------- ----------- -------------- -------------------------------------------------- Energy-related business category i* Industrial Energy Applications, Inc. $40,005 $39,730 In the fourth quarter of 2004, Industrial Energy Applications, Inc. repaid $275 of money pool borrowings to Alliant Energy Resources, Inc. Energy-related business category v* Heartland Energy Group, Inc. $3,289 $3,289 No change. Energy-related business category vi* BFC Gas Company LLC $1,975 $1,975 No change. Energy-related business category vii* RMT, Inc. (1) $11,822 $11,822 No change. Energy-related business category ix* Oak Hill Pipeline LP $849 $849 No change. ----------------------------------------- ----------- -------------- -------------------------------------------------- * Item 5 includes aggregate investments that were invested or committed to be invested in energy-related companies, prior to the date Rule 58 was effective for Alliant Energy Corporation (April 21, 1998 - Date Alliant Energy Corporation became a registered holding company), for which there is recourse, directly or indirectly, to Alliant Energy Corporation or any subsidiary thereof. (1) Includes RMT, Inc.; RMT North Carolina, Inc.; RMT, Inc., Michigan; and RMT International, Inc. ITEM 6 - FINANCIAL STATEMENTS AND EXHIBITS List all financial statements and exhibits filed as a part of this report. A. FINANCIAL STATEMENTS: Omitted for the fourth quarter pursuant to instructions for "Item 6." B. EXHIBITS: 1. Exhibit A - Certificate of Alliant Energy Corporation 2. Copies of contracts required by Item 3: Copies of contracts required to be provided by Item 3 have been filed under confidential treatment pursuant to Rule 104 (b). SIGNATURES Pursuant to the requirements of the Public Utility Holding Company Act of 1935, Alliant Energy Corporation has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on the 24th day of March 2005. ALLIANT ENERGY CORPORATION -------------------------- Registrant By: /s/ John E. Kratchmer Vice President-Controller and Chief Accounting Officer ------------------------- (Principal Accounting Officer) John E. Kratchmer 6 Exhibit A ALLIANT ENERGY CORPORATION 4902 N. Biltmore Lane, Madison, Wisconsin 53718-2132 CERTIFICATE Pursuant to the requirements of Rule 58 of the Public Utility Holding Company Act of 1935, the undersigned certifies that a conformed copy of the quarterly report on Form U-9C-3 shall be filed with the interested state commissions promptly after filing with the SEC. The names and addresses of each state commission having jurisdiction over the retail rates of the public utility companies that are associate companies of any of the reporting companies are: Iowa Utilities Board 350 Maple Street Des Moines, Iowa 50319-0069 Illinois Commerce Commission 527 E. Capitol Avenue Springfield, Illinois 62701 Minnesota Public Utilities Commission 121 7th Place E. Suite 350 St. Paul, MN 55101-2147 Public Service Commission of Wisconsin 610 North Whitney Way, P.O. Box 7854 Madison, Wisconsin 53707-7854 ALLIANT ENERGY CORPORATION -------------------------- Registrant By: /s/ John E. Kratchmer Vice President-Controller and Chief Accounting Officer -------------------------- (Principal Accounting Officer) John E. Kratchmer 7