Progress Energy was earlier a Fortune 500 energy corporation, but later it merged with Duke Energy to function as its subsidiary. This company has a generation capacity of over 21,000 megawatts and it includes two main electric utilities, which serve a customer base of about 3.1 million people in different locations. With its headquarters in Raleigh, North Carolina, the company was founded back in the year 1925. William D. Johnson was the CEO of the company, when it operated independently. The company owns and operates Crystal River 3, Brunswick, Shearon Harris, and Robinson nuclear power plants. It also holds many environmental records.