Constellation Energy (NYSE: CEG) today announced that it has been named to the 2011 Dow Jones Sustainability Index (DJSI) North America, which tracks the financial performance of leading sustainability-driven companies. This marks the sixth time that Constellation Energy has been named to the index. The DJSI provides an objective benchmark on sustainability for investors and financial portfolio managers.

"We are pleased that Constellation Energy has again been selected by the Dow Jones Sustainability Index to be listed among the world's leaders for sustainability practices. This is a significant honor and reflects great work and good practices across a wide range of measures and business activities," said Paul J. Allen, senior vice president and chief environmental officer, Constellation Energy. "It is important to note that the DJSI has become an extremely competitive ranking index, and our success is a result of the efforts of a large team of business leaders and subject-matter experts who focus on excellence across the company every day."

Constellation Energy received the highest marks in the electricity industry in the Risk & Crisis Management category, an achievement that reflects the company's steadfast dedication to life safety, emergency preparedness and risk management. The company also saw marked improvement over last year's scores in the Market Opportunities category, which reflects our growth in offering renewable energy products and services to our customers.

Constellation Energy is one of 12 U.S. companies named to the 2011 DJSI North America in the electricity sector. The DJSI conducts an annual review of corporations both regionally and globally across a wide range of industry sectors. The results are based on a thorough analysis of set criteria, which include a corporation's economic, environmental and social performance. Investors worldwide monitor the lists annually to determine which companies are successfully establishing and achieving sustainability initiatives. The index also focuses on financial transparency and measures stock market performance. The rankings help encourage corporations to invest in sustainability initiatives, as well as to reduce the current and future risks associated with industry-wide performance benchmarks.

About Constellation Energy

Constellation Energy (www.constellation.com) is a leading competitive supplier of power, natural gas and energy products and services for homes and businesses across the continental United States. It owns a diversified fleet of generating units, totaling approximately 12,000 megawatts of generating capacity, and is a leading advocate for clean, environmentally sustainable energy sources, such as solar power and nuclear energy. 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 $14.3 billion in 2010.

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