CEG Constellation Energy Grp. Common Stock

Constellation Energy (NYSE:CEG) today announced that it will be participating at the 2009 Edison Electric Institute (EEI) International Utility Conference.

Who:

� Kevin W. Hadlock, chief financial officer, Baltimore Gas and Electric Company �

What:

2009 Edison Electric Institute International Utility Conference �

When:

Tuesday, March 17, 2009

The presentation will not be webcast, but investors and other interested parties will be able to access a copy of the presentation materials on the Investor Relations page of Constellation Energy�s Web site, www.constellation.com.

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.