NRG Energy is an energy company. Co. produces and sells electricity and related products and services in primary power markets in the United States and Canada. Co. sells energy, services, and sustainable products and services directly to retail customers under the names NRG, Reliant, Green Mountain Energy, Stream and XOOM Energy, as well as other brand names owned by Co. Co.'s segments are: Retail, which includes retail energy, portable solar and battery products home services, and a variety of bundled products; and Generation, which includes plant operations, commercial operations, development, engineering and construction, asset management, energy services and other related functions.