Constellation Energy

Call Constellation: 855-795-9889

Constellation is an energy company headquartered in Baltimore, Maryland, United States. It is a subsidiary of Exelon. The company provides electric power, natural gas, and energy management services. It has approximately two million customers across the continental United States.

The company was known as Constellation Energy Group (former NYSE ticker symbol CEG), until a merger with Exelon in 2012. When the acquisition was approved by FERC, Constellation Energy’s energy supply business was re-branded as Constellation, an Exelon company. As part of the 2012 merger, Baltimore Gas and Electric, the regulated utility operated by Constellation Energy, became a regulated utility operating under Exelon Utilities.

Before merging with Exelon, Constellation Energy Group operated more than 35 power plants in 11 states (mainly Maryland, Pennsylvania, New York, West Virginia, and California). Baltimore Gas and Electric created Constellation as a holding company in 1999. Constellation Energy was a Fortune 500 company and one of the largest electricity producers in the United States.

Constellation provides to commercial and industrial customers fixed, index, and blended pricing solutions of electric power, including renewable energy. Its wholesale electricity supply business manages the sales, dispatch, and delivery of energy from Exelon’s power generation portfolio to utilities, municipal co-ops, and energy retailers nationwide. As of 2018, Constellation had around 360 megawatts of solar generation assets that is either in operation or under construction across the United States, including Maryland, California, Arizona, New Jersey, and Texas. In 2011, Constellation was contracted to construct and operate what was then the largest rooftop solar array ever constructed for the Toys-R-Us distribution center in Flanders, NJ.

Company’s offsite renewables service (CORe) provides access to offsite renewable energy projects through a retail power contract. CORe combines location-specific renewable energy purchases and renewable energy certificates with a physical load-following energy supply contract.



100 Constellation Way, Baltimore, MD 21202



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