Constellation NewEnergy to Supply Electricity to U.S. General Services Administration

Constellation Energy (NYSE:CEG) announced today that its subsidiary, Constellation NewEnergy, Inc., has signed the U.S. General Services Administration (GSA) to an electricity and renewable energy supply contract that will serve more than 150 federal agency and institutional customer accounts in Washington, D.C. Under the two-year contract, which was competitively bid by GSA, Constellation NewEnergy will supply 1.8 million megawatt hours of electricity per year to sites that include the U.S. Capitol, Kennedy Center, Smithsonian Institution, FBI and the Federal Reserve, among others. This includes meeting the GSA requirement to serve 5 percent of the total load with renewable energy or renewable energy certificates (RECs). Constellation NewEnergy will supply more than 90,000 RECs annually to these federal customers.

"Constellation NewEnergy will apply its considerable public sector energy management experience to help the GSA and other federal agencies control energy costs and maintain budget certainty,” said Michael Kagan, president of Constellation NewEnergy. "This also marks the single largest annual REC purchase by a Constellation NewEnergy customer, and we are proud to be assisting the U.S. General Services Administration and the federal agencies it serves in supporting renewables and becoming more sustainable.”

Constellation NewEnergy is also a federally approved provider of demand response services for both military and civilian government agencies, enabling federal sites to shed load during times of peak energy demand. Constellation Energy subsidiaries are also helping to improve the efficiency of federal buildings through energy retrofit projects, energy saving performance contracts and deployment of renewable energy systems.

About Constellation NewEnergy

Constellation NewEnergy (www.newenergy.com) is a leading competitive supplier of electricity, natural gas and energy-related services to commercial, industrial and institutional customers throughout the United States. A subsidiary of Constellation Energy (NYSE: CEG), Constellation NewEnergy operates in all competitive energy markets throughout the U.S., providing products that enable customers to effectively manage and control energy costs.

About Constellation Energy

Constellation Energy (www.constellation.com) is a leading supplier of energy products and services to wholesale and retail electric and natural gas customers. It owns a diversified fleet of generating units located throughout the United States, totaling approximately 9,000 megawatts of generating capacity, and is among the leaders pursuing the development of new nuclear plants in the United States. The company delivers electricity and natural gas through the Baltimore Gas and Electric Company (BGE), its regulated utility in Central Maryland. A FORTUNE 500 company headquartered in Baltimore, Constellation Energy had revenues of $19.8 billion in 2008.