1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 31, 1997 AMEREN CORPORATION (Exact name of registrant as specified in its charter) Missouri 43-1723446 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) 1901 Chouteau Avenue, St. Louis, Missouri 63103 (Address of principal executive offices and Zip Code) Registrant's telephone number, including area code: (314) 621-3222 2 ITEM 2. ACQUISITION OR DISPOSITION OF ASSETS Reference is made to Registrant's Current Report Form 8-K dated December 31, 1997 (the "December 31, 1997 8-K"), as filed with the Securities and Exchange Commission on January 2, 1998. During the preparation of the December 31, 1997 8-K Exhibits 99-2 and 99-3 for electronic filing with the Securities and Exchange Commission, certain columns of numbers were transposed and other formatting errors occurred. A complete copy of Exhibit 99-2, which includes corrected pages 11, 12, and 25 thereto, is attached hereto as Exhibit 99-2 and incorporated herein by reference. A complete copy of Exhibit 99-3, which includes corrected pages 7 and 9 thereto, is attached hereto as Exhibit 99-3 and incorporated herein by reference. Any references to Exhibits 99-2 and 99-3 in the December 31, 1997 8-K are deemed to refer to the versions of such Exhibits filed herewith. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS The copies of Exhibits 99-2 and 99-3 attached hereto supersede the December 31, 1997 8-K Exhibits 99-2 and 99-3 in their entirety. (a) Exhibits. Exhibit 99-2 - Supplemental Consolidated Financial Statements. Exhibit 99-3 - Supplemental Consolidated Condensed Quarterly Financial Statements. SIGNATURE 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 thereunto duly authorized. AMEREN CORPORATION (Registrant) By /s/ James C. Thompson --------------------- James C. Thompson Secretary Date: January 12, 1998 -2- 3 Exhibit Index Exhibit No. Description - ----------- ----------- 99-2 Supplemental Consolidated Financial Statements. 99-3 Supplemental Consolidated Condensed Quarterly Financial Statements. -3-