X0306 4 2012-12-14 1 0001126294 GenOn Energy, Inc. GEN 0001184021 MOLER ELIZABETH A 1000 MAIN STREET HOUSTON TX 77002 1 0 0 0 Common Stock 2012-12-14 4 D 0 54994 D 0 D The reporting person disposed of these shares in connection with the merger (the "Merger") involving GenOn Energy, Inc. and NRG Energy, Inc.("NRG") in exchange for shares of NRG common stock, based on the exchange ratio of 0.1216 and having a market value of $23.00 per share on the effective date of the Merger, plus cash consideration for fractional shares. /s/ Elizabeth A. Moler 2012-12-18