NRG Energy, Inc. (NRG) is an integrated wholesale power generation and retail electricity company in the United States. NRG is a wholesale power generator engaged in the ownership and operation of power generation facilities; the trading of energy, capacity and related products; and the transacting in and trading of fuel and transportation services. NRG is a retail energy company engaged in the supply of energy, services, and sustainable products to retail customers in competitive markets through multiple channels and brands like Reliant Energy, Green Mountain Energy, and Energy Plus (collectively, the Retail Business). In March 2014, the Company acquired Roof Diagnostics Solar (RDS). In April 2014, the Company announced that it has completed the acquisitions of substantially all assets of Edison Mission Energy (EME) and competitive retail electricity business of Dominion Resources, Inc.