Gary L. Rainwater

Ameren Energy Resources Generating Co. generates and supplies electricity. It operates non-rate-regulated electric generation, transmission, and natural gas distribution businesses. The company was founded in 1913 and is headquartered in Peoria, IL.

Central Illinois Public Service Co., Inc. distributes electricity and natural gas. It provides energy delivery services to 400,000 electric customers in 576 communities. The company was founded in 1902 and is headquartered in Springfield, IL.

Illinois Power Co. provides electricity services. It owns and operates power stations. The company offers its services through ConnectUtilities.com along with phone, cable TV, satellite TV, Internet (DSL or Cable High Speed Internet), and newspaper. Illinois Power is headquartered in Decatur, IL

Illinois Power Generating Co. engages in generating and supplying electricity. It owns and operates a merchant generation business in Illinois. The company was founded in March 2000 and is headquartered in Houston, TX.

Part of Ameren Corp., Ameren Services Co. provides administrative support services. The company is based in St. Louis, MO.

Union Electric Co. provides energy related services. It operates a rate-regulated electric generation, transmission, and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. It manages a portfolio of natural gas supply resources. The company was founded in 1881 and is headquartered in St. Louis, MO.

CILCORP, Inc. distributes electricity and natural gas. The company also provides rate-regulated electric generation, transmission and distribution, natural gas distribution, and non-rate-regulated electric generation businesses in Missouri and Illinois. The company was founded in 1985 and is located in Peoria, IL.

Part of Ameren Corp., CILCO is a company that provides liquefied petroleum gas production and distribution services. The company is based in Lowpoint, IL.