SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 In the Matter of: AMEREN CORPORATION QUARTERLY CERTIFICATE AMEREN SERVICES COMPANY PURSUANT TO RULE 24 UNDER THE UNION ELECTRIC COMPANY PUBLIC UTILITY HOLDING COMPANY CENTRAL ILLINOIS PUBLIC SERVICE ACT OF 1935 COMPANY File Nos. 70-9877, 70-9427, 70-9423 and 70-9133 ================================================================================ Ameren Corporation ("Ameren"), a registered holding company, and its subsidiaries named above, hereby file this certificate pursuant to Rule 24 reporting on transactions authorized by the Commission by orders dated October 5, 2001 (Holding Co. Act Release No. 27449), July 23, 1999 (Holding Co. Act Release No. 27053), March 22, 1999 (Holding Co. Act Release No. 26993), and March 13, 1998 (Holding Co. Act Release No. 26841). This certificate is filed with respect to transactions consummated during the quarter ended September 30, 2002. A. File No. 70-9877: 1. Sales of any Common Stock (other than pursuant to the Plans) and the purchase price per share and the market price per share at the date of the agreement of sale. During the 3rd quarter of 2002, Ameren Corporation issued an aggregate of 8,050,000 shares (7,000,000 base shares and 1,050,000 shares pursuant to the exercise of an option granted to the underwriters) of Common Stock at $42.00 per share. The offering closed on September 10, 2002. 2. The total number of shares of Common Stock issued or issuable under options, warrants or other stock-purchase rights granted during the quarter under the Plans. Dividend Reinvestment and Stock Purchase Plan: 393,111 Long Term Savings Plan 148: 18,579 Long Term Savings Plan 702: 17,526 Savings Investment Plan 253,309 Long Term Incentive Plan (Restricted Common Stock) 0 Total 682,525 3. If Common Stock has been transferred to a seller of securities of a company being acquired, the number of shares so issued, the value per share and whether the shares are restricted to the acquiror. N/A 4. The amount and terms of any Long-term Debt, Preferred Stock or other preferred or equity-linked securities issued by Ameren, directly or indirectly through a Financing Subsidiary, during the calendar quarter. No such securities were issued during the 3rd quarter of 2002. 5. The amount and terms of any Short-term Debt issued directly or indirectly by Ameren during the calendar quarter. A. There was no commercial paper issued during the 3rd quarter of 2002. B. There were no bank loans for the 3rd quarter of 2002. Maximum indebtedness at any one time: $0.00. 6. A description of the amount, terms and purpose of any Guarantee issued during the calendar quarter by Ameren and the name of the beneficiary of such Guarantee. Parent Subsidiary Amount Terms Purpose ------ ---------- ------ ----- ------- Ameren Corp. Ameren Energy Marketing $ 3,000,000 09/19/02-12/31/03 Credit Support Ameren Corp. Ameren Energy Fuels & Services Co. $ 5,000,000 07/08/02-12/31/03 Credit Support 7. The name and amount invested by Ameren in any Financing Subsidiary during the calendar quarter. N/A 8. The notional amount and principal terms of any Interest Rate Hedge or Anticipatory Hedge entered into during the quarter and the identity of the parties to such instruments. No such agreements were entered into during the 3rd quarter of 2002. 9. Consolidated balance sheet of Ameren as of the end of the calendar quarter. Incorporated by reference to Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2002 in File No. 1-14756. B. File No. 70-9427: 1. Balance Sheet and Income Statement for each Intermediate Subsidiary for the three, six or nine month period ended. To be filed confidentially under Rule 104. 2. Information concerning the nature and extent of services provided by Ameren Development, Ameren Energy, CIC or any other non-utility subsidiary that is authorized or permitted under the Act to sell goods and services during the quarter, identifying the associate company to which such services are sold, the service and the charge, and stating whether the charge was computed at cost, market or by another method (as specified herein). To be filed confidentially under Rule 104. 3. Information concerning the completion of any reorganization of Ameren's ownership in Intermediate Subsidiaries and/or Nonutility Subsidiaries, including the identity of the companies involved and their line of business and corporate structure both before and after the reorganization. N/A 2 C. File No. 70-9423: The maximum outstanding amount of all borrowings under or investments in the Utility Money Pool by each Utility Money Pool participant during the quarter, and the rate or range of rates charged on Utility Money Pool borrowings and paid on Utility Money Pool investments during the quarter. Maximum contribution/investment for CIPS - $113.4 million Maximum contribution/investment for Union Electric - $25.5 Maximum contribution/investment for Ameren Corporation - $302.9 million Maximum borrowing for Ameren Services - $130.2 million Maximum borrowing for Union Electric - $254.7 million Average interest rate for the Utility Money Pool for the quarter: 1.7% D. File No. 70-9133: 1. The amount and terms of any Short-term Debt issued by Union Electric or CIPS (other than through the Utility Money Pool) during the calendar quarter. There was no Short-term Debt issued by Union Electric or CIPS (other than through the Utility Money Pool) during the calendar quarter. 2. The notional amount and principal terms of any Interest Rate Hedge entered into during the quarter by Union Electric or CIPS and the identity of the parties to such instruments. No such agreements were entered into during the 3rd quarter of 2002. The undersigned registered holding company has duly caused this quarterly report to be signed on its behalf by the undersigned officer thereunto duly authorized pursuant to the requirements of the Public Utility Holding Company Act of 1935. Ameren Corporation By /s/ Jerre E. Birdsong Date: September 30, 2002 ----------------------------------------- Jerre E. Birdsong Vice President and Treasurer 3