|Description||power generation company|
|Green Mountain Energy, 9/10||$350M|
NRG Energy, Inc., together with its subsidiaries, operates as a wholesale power generation company. The company engages in the ownership, development, construction, and operation of power generation facilities. It also engages in transacting in and trade of fuel and transportation services; the trade of energy, capacity, and related products in the United States and internationally; and the supply of electricity and energy services to retail electricity customers in the Texas market. As of December 31, 2009, the companyâ€™s power generation assets consisted of approximately 10,660 megawatt (MW) of gas-fired; 7,560 MW of coal-fired; 3,715 MW of oil-fired; 1,175 MW of nuclear; and 365 MW of renewable generating capacity in the United States. In addition, NRG Energy also owns approximately 115 MW of thermal capacity domestically, as well as 1,005 MW of power generation capacity overseas in Australia and Germany.
The company was founded in 1989 and is headquartered in Princeton, New Jersey.