Exelon
Exelon Generation has one of the industry’s largest portfolios of electricity generation capacity, with a nationwide reach and strong positions in the Midwest and Mid-Atlantic. It is the largest owner/operator of nuclear plants in the United States. Exelon delivers electricity to approximately 5.4 million customers in northern Illinois via ComEd and southeastern Pennsylvania via PECO, as well as natural gas to 486,000 customers in the Philadelphia area via PECO.
URL: http://www.exeloncorp.com