To qualify for an EcoStar grant, a project must be located in an area where Constellation Energy does business. Applicants also are required to have a board of directors and be designated a 501(c)3 nonprofit organization.A complete list of the 93 organizations that received 2012 EcoStar grants and a brief description of each project can be found on the EcoStar section of Constellation Energy's website. About Exelon Exelon Corporation (NYSE:EXC) is the nation’s leading competitive energy provider, with approximately $33 billion in annual revenues. Headquartered in Chicago, Exelon has operations and business activities in 47 states, the District of Columbia and Canada. Exelon is the largest competitive U.S. power generator, with approximately 35,000 megawatts of owned capacity comprising one of the nation’s cleanest and lowest-cost power generation fleets. The company’s Constellation business unit provides energy products and services to approximately 100,000 business and public sector customers and approximately 1 million residential customers. Exelon’s utilities deliver electricity and natural gas to approximately 6.6 million customers in central Maryland (BGE), northern Illinois (ComEd) and southeastern Pennsylvania (PECO).