X0202 4 2007-09-07 0 0001013871 NRG ENERGY, INC. NRG 0001302354 Jacobs Christine A NRG ENERGY, INC. 211 CARNEGIE CENTER PRINCETON NJ 08540 0 1 0 0 Sr.Vice Pres, Plant Operations Common Stock, par value .01 per share 2007-09-07 4 F 0 2952 D 17802 D On May 2, 2007, NRG Energy, Inc. announced a 2-for-1 stock split, in the form of a stock dividend paid on May 31, 2007 to all holders of record of Common Stock on May 22, 2007. The Company's Common Stock began trading on a split-adjusted basis on June 1, 2007. On September 7, 2004, Ms. Jacobs was issued 5,000 Restricted Stock Units ("RSU's") by NRG Energy, Inc. pursuant to the Restricted Stock Unit Agreement by and between NRG Energy, Inc. and Ms. Jacobs. Each RSU is equivalent in value to one share of NRG's Common Stock, par value $0.01. On September 7, 2007 the RSU's became unrestricted. Ms. Jacobs elected to satisfy her tax withholding obligation upon the exchange of common stock for RSU's by surrendering a number of shares of common stock having a value on the date of the exchange equal to the tax withholding obligation. This form in being filed to reflect the surrender of 2,952 shares of common stock to satisfy her tax withholding obligation. Christine Jacobs 2007-09-12