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AT: Atlantic Power Corporation owns interest in various power projects and a transmission line in the United States. Its portfolio of assets consists of 13 operational power generation projects with approximately 878 MW generation capacity; a 500 kilovolt 84-mile electric transmission line in California; a biomass project under construction in Georgia; and various development stage generating projects. The company also sells steam under sales agreements to industrial purchasers. It serves various utilities and other parties under power purchase agreements. The company was founded in 2004 and is headquartered in Boston, Massachusetts.
 

EDE: The Empire District Electric Company, together with its subsidiaries, primarily engages in the generation, purchase, transmission, distribution, and sale of electricity in Missouri, Kansas, Oklahoma, and Arkansas. The company generates electricity from steam, hydro, coal, and natural gas with fuel oil and tire-derived fuel (TDF) sources for residential, commercial, industrial, wholesale on-system, and wholesale off-system transactions customers, as well as for public authorities. As of December 31, 2009, it owned generating facilities with an aggregate generating capacity of 1,257 megawatts; transmission system of approximately 22 miles of 345 kV lines, 434 miles of 161 kV lines, 745 miles of 69 kV lines, and 81 miles of 34.5 kV lines; and distribution system of approximately 6,905 miles of lines. The company also owns and operates water pumping facilities and distribution systems consisting of a total of approximately 87 miles of water mains in 3 communities in Missouri. In addition, The Empire District Electric Company provides natural gas distribution to customers in 44 communities in northwest, north central, and west central Missouri. Its principal gas utility properties include approximately 87 miles of transmission mains and approximately 1,118 miles of distribution mains. Further, it engages in leasing fiber optics cable and equipment. The company was founded in 1909 and is based in Joplin, Missouri.
 

POM: Pepco Holdings, Inc., through its subsidiaries, engages in the transmission, distribution, and supply of electricity. The company also distributes and supplies natural gas. It distributes electricity to approximately 1.8 million customers in the mid-Atlantic region and delivers natural gas to approximately 123,000 customers in Delaware. In addition, the company involves in the retail supply of electricity and natural gas; provision of energy efficiency services to federal, state, and local government customers; and designs, constructs, and operates combined heat and power and central energy plants, as well as owns and operates two oil-fired generation facilities. Further, it offers high voltage electric construction and maintenance services, low voltage electric construction and maintenance services, and streetlight construction and asset management services to utilities, municipalities, and other customers in the Washington, District of Columbia. Additionally, the company holds investments in eight cross-border energy leases. Pepco Holdings, Inc. was founded in 1896 and is based in Washington, District of Columbia.