NRG Energy, Inc. (NYSE: NRG) and GenOn Energy, Inc. (NYSE: GEN) today jointly announced that the Federal Energy Regulatory Commission (FERC) and New York Public Service Commission (N.Y. PSC) have approved the previously announced merger of NRG and GenOn. The combination of NRG and GenOn will create the nation’s largest competitive generator of electricity, with about 47,000 megawatts of generating capacity. The combined company’s diverse portfolio of both conventional and renewable generation facilities can power nearly 40 million American homes. The FERC and N.Y. PSC approvals represent the final regulatory authorizations required to close the transaction. The N.Y. PSC approved the merger at an open meeting today. NRG and GenOn expect the written order memorializing the N.Y. PSC approval of the merger will be issued before the end of the week and the companies will close the transaction promptly after receiving the written order. About NRG NRG is at the forefront of changing how people think about and use energy. A Fortune 300 company, NRG is a pioneer in developing cleaner and smarter energy choices for our customers: whether as one of the largest solar power developers in the country, or by building the first privately funded electric vehicle charging infrastructure or by giving customers the latest smart energy solutions to better manage their energy use. Our diverse power generating facilities can support more than 20 million homes and our retail electricity providers – Reliant, Green Mountain Energy Company and Energy Plus – serve more than two million customers. More information is available at www.nrgenergy.com. About GenOn GenOn is one of the largest competitive generators of wholesale electricity in the United States. With power generation facilities located in key regions of the country and a generation portfolio of approximately 22,000 megawatts, GenOn is helping meet the nation’s electricity needs. GenOn’s portfolio of power generation facilities includes baseload, intermediate and peaking units using coal, natural gas and oil to generate electricity. GenOn has experienced leadership, dedicated team members, financial strength and a solid commitment to safety, the environment, operational excellence and the communities in which it operates. GenOn routinely posts all important information on its web site at www.genon.com. Forward Looking Statements In addition to historical information, the information presented in this communication includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Exchange Act. These statements involve estimates, expectations, projections, goals, assumptions, known and unknown risks and uncertainties and can typically be identified by terminology such as “may,” “will,” “should,” “could,” “objective,” “projection,” “forecast,” “goal,” “guidance,” “outlook,” “expect,” “intend,” “seek,” “plan,” “think,” “anticipate,” “estimate,” “predict,” “target,” “potential” or “continue” or the negative of these terms or other comparable terminology. Such forward-looking statements include, but are not limited to, statements about the anticipated benefits of the proposed transaction between NRG and GenOn, each party’s and the combined company’s future revenues, income, indebtedness, capital structure, plans, expectations, objectives, projected financial performance and/or business results and other future events, each party’s views of economic and market conditions, and the expected timing of the completion of the proposed transaction.