This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. In connection with the proposed business combination transaction between NRG and GenOn, NRG filed with the SEC a registration statement on Form S-4 that includes a joint proxy statement of NRG and GenOn and that also constitutes a prospectus of NRG. The registration statement was declared effective by the SEC on October 5, 2012. NRG and GenOn first mailed the joint proxy statement to their respective stockholders on or about October 10, 2012. In addition, the joint proxy statement/prospectus was supplemented on October 25, 2012, and GenOn first mailed the supplement to its stockholders on or about October 26, 2012.