ST. LOUIS, April 27 /PRNewswire-FirstCall/ -- Thomas R. Voss, Ameren CEO and president, and Martin J. Lyons, Ameren senior vice president and CFO, will speak Monday, May 4, 2009, at 12:10 p.m. (Eastern Time) at the American Gas Association Financial Forum.

Ameren's presentation will be available on a live audio Webcast from 12:10 p.m. to 12:45 p.m. (Eastern Time) via a link on the Investors/Presentations section of Ameren's Web site, http://www.ameren.com. It will be available for replay at this site approximately one hour after the presentation for one year.

With assets of $23 billion, Ameren serves approximately 2.4 million electric customers and almost one million natural gas customers in a 64,000 square mile area of Missouri and Illinois.

SOURCE  Ameren Corporation

    -0-                           04/27/2009
    /CONTACT:  Analysts, Doug Fischer, +1-314-554-4859, or Media, Susan
Gallagher, +1-314-554-2175, both of Ameren Corporation/
    /Web Site:  http://www.ameren.com /
    (AEE)

CO:  Ameren Corporation; American Gas Association

ST:  Missouri
IN:  OIL EUT UTI
SU:  TDS CCA

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8117 04/27/2009 10:31 EDT http://www.prnewswire.com