Based in Philadelphia, PECO is an electric and natural gas utility subsidiary of Exelon Corporation (NYSE: EXC). PECO serves 1.6 million electric and 494,000 natural gas customers in southeastern Pennsylvania and employs about 2,400 people in the region. PECO delivered 82.1 billion cubic feet of natural gas and 38.1 billion kilowatt-hours of electricity in 2011. Founded in 1881, PECO is one of the Greater Philadelphia Region's most active corporate citizens, providing leadership, volunteer and financial support to numerous arts and culture, education, environmental, economic development and community programs and organizations.