AMEREN CORPORATION
1901 CHOUTEAU AVENUE
ST LOUIS, MO 63103
(314) 621 - 3222
www.ameren.com
COMPANY  PROFILE
 

AMEREN CORPORATION is a public utility holding company registered under the Public Utility Holding Company Act of 1935 (PUHCA) and does not own or operate any significant assets other than the stock of its subsidiaries, including its two utility operating subsidiaries, AmerenCIPS and AmerenUE.

AmerenCIPS is an Illinois corporation organized in 1902. It supplies electric and gas service to territories in central and southern Illinois having an estimated population of 820,000 within an area of approximately 20,000 square miles.

AmerenUE was incorporated in Missouri in 1922, and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the State of Missouri and supplies electric and gas service in territories in Missouri and Illinois having an estimated population of 2,600,000 within an area of approximately 24,500 square miles, including the greater St. Louis area.

On a consolidated basis the Company's operating revenues are derived from the sale of electric energy, from the sale of natural gas, and from other sources.

The Company also owns all of the common stock of other subsidiary companies as follows:

1. CIPSCO Investment Company, a nonregulated investment company incorporated in Illinois;

2. Ameren Services Company, a Missouri corporation which provides administrative, accounting, legal, engineering, executive, and other support services to Ameren and all of its subsidiaries;

3. AmerenEnergy, Inc., a Missouri corporation which primarily serves as a power marketing agent for the operating utility companies and provides a range of energy and risk management services to targeted customers;

4. Ameren Development Company, a nonregulated holding company incorporated in Missouri encompassing Ameren's nonregulated products and services; and

5. Ameren Energy Resources Company, a nonregulated Illinois holding company for an Illinois nonregulated generating subsidiary and its marketing affiliate

In addition, through its operating subsidiaries, the Company owns 60% of the Common Stock of Electric Energy, Inc., which owns and operates a generating plant with a nominal capacity of 1,000 mW. Of the plant's total output, 50% is committed to the Department of Energy, 15% to AmerenUE, 7.5% to AmerenCIPS, and the remainder to its other owners.