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Company nameAmeren Corporation
Company typePublic (NYSE - AEE)
S&P 500 Component
HeadquartersSt. Louis, Missouri, U.S.
Key peopleThomas Voss, Chairman, CEO, & President; Greg Nelson, Senior VP and General Counsel
ProductsElectricity (16,900 megawatts) and Natural Gas
Revenue(+)US$7.64 billion (FY 2010)
Operating income(+)US$ 916 million (FY 2010)
Net income(+)US$139 million (FY 2010)
Total assets(+)US$23.5 billion (FY 2010)
Total equity(+)US$7.73 billion (FY 2010) (Dec. 31, 2010 Qtr tab) |homepage=
Employees9,474 (2010)

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Ameren Corporation NYSE - AEE was created December 31, 1997 by the merger of Missouri's Union Electric Company (formerly NYSE: UEP) and the neighboring Central Illinois Public Service Company (CIPSCO Inc. holding, formerly NYSE: CIP). It is now a holding company for several power companies and energy companies. The company is based in St. Louis, Missouri, serving 2.4 million electric, and 900,000 natural gas customers across 64,000 sq. mi.

Ameren is the holding company for the following:

*Ameren Missouri, Union Electric Company, 1997

*Ameren Illinois, was Ameren CIPS, acquired company was Central Illinois Public Service Company, 1997

*Ameren Illinois, was AmerenCILCO, acquired company was Central Illinois Light Company, 2003

*Ameren Illinois, was AmerenIP, acquired company was Illinois Power Company, 2004

*Ameren Energy Resources, holding company, 2000

**Ameren Energy Marketing

**Ameren Energy Generating

The Ameren Missouri subsidiary owns Bagnell Dam on the Osage River, which forms the Lake of the Ozarks. Ameren Missouri is responsible for managing water levels on the lake according to federal regulations.

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