ST. LOUIS, July 7 /PRNewswire-FirstCall/ -- Ameren Energy Generating Company ("Genco"), a subsidiary of Ameren Corporation (NYSE: AEE), announced today the settlement of its offer to exchange up to $300,000,000 aggregate principal amount of its 7.00% Senior Notes, Series H due 2018 (the "Exchange Notes"), which have been registered under the Securities Act of 1933, as amended, for up to $300,000,000 aggregate principal amount of its outstanding 7.00% Senior Notes, Series G due 2018 (the "Outstanding Notes").

The exchange offer expired at 5:00 p.m., New York City time, on July 1, 2008. As of the expiration of the exchange offer, the entire aggregate principal amount of Outstanding Notes had been validly tendered for exchange and not validly withdrawn, which Genco has accepted for exchange.

Ameren Energy Generating Company is a subsidiary of St. Louis-based Ameren Corporation. Ameren companies serve 2.4 million electric customers and one million natural gas customers in a 64,000-square-mile area of Missouri and Illinois.

SOURCE  Ameren Corporation
    -0-                             07/07/2008
    /CONTACT:  Media, Susan Gallagher, +1-314-554-2175, sgallagher@ameren.com,
or Analysts, Theresa Nistendirk, +1-314-206-0693, tnistendirk@ameren.com, or
Investors, Investor Services, invest@ameren.com, all of Ameren Corporation/
    /Web site:  http://www.ameren.com /
    (AEE)

CO:  Ameren Corporation; Ameren Energy Generating Company; Genco
ST:  Missouri
IN:  OIL UTI
SU:

JR-JP
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9458 07/07/2008 17:15 EDT http://www.prnewswire.com