Exelon Corporation (NYSE:_EXC) is an American energy producer, trader, and distributor headquartered in the Chase Tower in the Chicago Loop area of Chicago, Illinois, US. It was created in October 2000 by the merger of PECO Energy Company and Unicom, of Philadelphia and Chicago respectively. Unicom owned Commonwealth Edison. Exelon operates regulated utilities in Illinois, Pennsylvania, and Maryland. In October 2009, Exelon had full or majority ownership of 17 nuclear reactors in 10 nuclear power plants. Exelon has operations and business activities in 47 states, the District of Columbia and Canada and is the largest competitive U.S. power generator with approximately 35,000 megawatts of owned capacity. Exelon currently ranks as the second largest electric and natural gas company in the United States by market capitalization. On June 30, 2005 the Federal Energy Regulatory Commission approved the merger of Exelon and Public Service Enterprise Group Inc., a New Jersey utility.
Contributions by TheLou75, Tswachter, and SmackBot.