Ameren

Ameren was created by the combination of three Illinois utilities (CIPSCO Incorporated, CILCO Inc. and Illinois Power Company) and Union Electric Company of St. Louis. The name comes from combining the words American and Energy.

Facts and Figures

Ameren Corporation is a Fortune 500 company that trades on the New York Stock Exchange under the symbol AEE. It is the parent company of Ameren Illinois, based in Collinsville, Ill., and Ameren Missouri in St. Louis. They also have a Transmission Company, also based in St. Louis, designs and builds regional transmission projects.

Ameren was created by the combination of three Illinois utilities (CIPSCO Incorporated, CILCO Inc. and Illinois Power Company) and Union Electric Company of St. Louis. The name comes from combining the words American and Energy.

Employing more than 9,000 personnel,  with 2.4 million electric customers and more than 900,000 natural gas customers across a 64,000-square-mile area, Missouri ranks as the largest electric power provider in Missouri, and Illinois ranks as Illinois’ third largest natural gas distribution operation in total number of customers. We generate a net capacity of nearly 10,200 megawatts of electricity and own more than 7,500 circuit miles of transmission lines.

Find more in the Fact Sheet (PDF).

Read about Alerts.

View more Utility Companies on Energy Partner Network.

Visit the Virtual Trade Show.
Perform an Advanced Search of the partner directory.