Constellation Energy Group

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Constellation Energy Group (former NYSE ticker symbol CEG), headquartered in Baltimore, Maryland, was an energy producer, trader, and distributor. The company operated over 35 power plants in 11 states (mainly Maryland, Pennsylvania, New York, West Virginia, and California) under its operating company Constellation Energy Group. Constellation Energy's regulated utility, Baltimore Gas & Electric, operated in central Maryland. Constellation Energy was a Fortune 500 company and was one of the top electricity producers in the United States.

In April 2011, Exelon announced its intention to purchase Constellation Energy. The acquisition was approved by FERC and the companies officially combined on March 12, 2012 with Constellation Energy taking the Exelon name and the corporate headquarters moving to Exelon in Chicago, Illinois. Before its departure, Constellation Energy was the only remaining Fortune 500 company headquartered in Baltimore. The competitive and wholesale energy supply business of Constellation Energy would become a subsidiary of Exelon re-branded as Constellation, an Exelon company. Baltimore Gas & Electric, formerly the regulated utility of Constellation Energy, would become a regulated utility operating under Exelon Utilities.

www.constellation.com/about-constellation/who-we-are/pa...