News Releases

AmerenUE, a subsidiary of Ameren Corporation (NYSE: AEE), announced today that it is offering $260 million of 5.40% senior secured notes due 2016. The transaction is expected to close on Dec. 8, 2005. AmerenUE intends to use the net offering proceeds of approximately $257.3 million to repay outstanding short-term debt. The lead underwriters for the offering are Barclays Capital Inc., BNY Capital Markets, Inc., and J.P. Morgan Securities Inc.

The offering may be made by means of a prospectus and a related prospectus supplement, copies of which may be obtained when available from Barclays Capital Inc. at 200 Park Ave., New York, N.Y., 10166, Attention: Fixed Income Syndicate, Phone: 212-412-2663; BNY Capital Markets, Inc. at One Wall St., New York, N.Y., 10286. Attention: Debt Capital Markets, Phone: 212-635-8974; and J.P. Morgan Securities Inc., at 270 Park Ave., New York, N.Y., 10017, Attention: High Grade Syndicate Desk-8th Floor, Phone: 212-834-4533.

AmerenUE is a subsidiary of St. Louis-based Ameren Corporation. Ameren companies serve 2.3 million electric customers and 900,000 natural gas customers in a 64,000-square-mile area of Missouri and Illinois.

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