Mark M. Leaman

Invenergy LLC develops, owns, and operates power generation facilities. It offers financing, construction, ownership and operations, environment, and community engagement services. The firm develops and operates wind, solar, natural gas, combined heat and power generation, and energy storage projects. The company was founded by Michael Polsky in 2001 and is headquartered in Chicago, IL.

Part of Calpine Corp., Calpine Northbrook Energy LLC is a company that develops, owns, and operates independent power projects. The company is based in NorthBrook, IL. Calpine Northbrook Energy was acquired by Calpine Corp. from Wisconsin Energy Corp. on October 18, 2000 for $450 million. The company was founded by Michael P. Polsky.

Calpine Corp. operates as power generation company, which engages in the ownership and operation of natural-gas fired and geothermal power plants. It sells power and related services to wholesale customers who include commercial and industrial end-users, state and regional wholesale market operators, and retail customers. The company was founded by Peter Cartwright in June 1984 and is headquartered in Houston, TX.

Commonwealth Edison Co. engages in the provision of electric utility services. It focuses on the purchase and regulated retail sale of electricity. It also involves in the transmission and distribution of electricity to retail customers. The company was founded in September 1907 and is headquartered in Chicago, IL.