X0508 4 2023-09-03 0001013871 NRG ENERGY, INC. NRG 0001940921 Chung Bruce 804 CARNEGIE CENTER PRINCETON NJ 08540 1 EVP & CFO 0 Common Stock, par value $.01 per share 2023-09-03 4 F 0 217.0000 0 D 52386.0000 D On September 3, 2021, the Reporting Person was issued a supplemental grant of 1,762 Restricted Stock Units ("RSUs") by NRG Energy, Inc. under NRG Energy, Inc.'s Amended and Restated Long Term Incentive Plan. Each RSU is equivalent in value to one share of NRG's common stock, par value $.01. On September 3, 2023, 587 shares vested. The Reporting Person elected to satisfy their tax obligation upon the exchange of common stock for RSUs having a value on the date of the exchange equal to the withholding obligation. This form reflects the surrender of 217 shares of common stock to satisfy the grantee's tax withholding obligation. In connection with the vesting of the RSUs described above, 46 DERs vested, resulting in the Reporting Person holding 1,204 dividend equivalent rights in the aggregate. Dividend equivalent rights accrue on theReporting Person's restricted stock units or relative performance stock units, which become exercisable proportionately with the restricted stock units or relative performance stock units. Christine Zoino, by Power of Attorney 2023-09-06