Roxxon Energy Corporation was created in 1974.
Imperial Energy Corporation was created in 2004.
Wisconsin Energy Corporation was created in 1987.
Mongolia Energy Corporation was created in 1972.
Energy Alberta Corporation was created in 2005.
Renewable Energy Corporation was created in 1996.
Valero Energy Corporation was created on 1980-01-01.
Vermont Energy Investment Corporation was created in 1986.
China Energy Conservation Investment Corporation was created in 1997.
Gujarat Energy Transmission Corporation Limited was created in 1999-05.
Sempra Energy was created in 1998 through the merger of two companies - Pacific Enterprises and Enova Corporation.
Wisconsin Energy Corporation's population is 2,009.
Wisconsin Energy Corporation's population is 4,545.