Cinergy Corporation is a utility holding company with ownership of three regulated utilities: (1) Cincinnati Gas & Electric Company, which has electric and gas utility operations in Ohio, (2) Union Light, Heat and Power Company, which provides electric and gas services in Kentucky and (3) PSI Energy, Inc., an electric utility operator in Indiana. Other subsidiaries include non-regulated wholesale energy operations.

Luminant, a subsidiary of Vistra Energy, is a competitive power generation business, including mining, wholesale marketing and trading, and development operations. Luminant has nearly 17,000 megawatts of generation in Texas, including 2,300 MW fueled by nuclear power and 8,000 MW fueled by coal. The company is a large purchaser of wind-generated electricity. Vistra Energy is a premier Texas-based energy company focused on competitive energy.