Duke Energy, 7255 72nd St N, Pinellas Park, FL 33781, US

Founded in 1981, Florida Power Corporation, a subsidiary of Progress Energy, provides electricity and related services to nearly 1.5 million customers in Florida. The company is headquartered in St. Petersburg, Fla., and serves a territory encompassing more than 20,000 square miles that includes the cities of St. Petersburg and Clearwater, as well as the Central Florida area surrounding Orlando. Its parent company, Progress Energy, headquartered in Raleigh, N.C., is a Fortune 250 diversified energy company with over 23,000 megawatts of generation capacity. Progress Energy's holdings include two electric utilities that serve approximately 3 million customers in North Carolina, South Carolina and Florida. The company is the recipient of the Edison Electric Institute's Edison Award.