Constellation NewEnergy is a star player in the new energy arena of deregulated markets. The company is a competitive retail supplier that provides energy and related services to more than 19,000 large commercial and industrial customers. Constellation NewEnergy, a unit of Constellation Energy Group, (itself a subsidiary of Exelon) markets electricity and natural gas in 31 US states. It also supplies energy to customers in three Canadian provinces. The company delivers more than 13,000 MW of peak load electricity and 400 billion cu. ft. natural gas under annual contract. Constellation NewEnergy serves numerous FORTUNE 500 companies, including Staples, 3M, and Kimberly-Clark.