X0508 4 2023-11-01 0001013871 NRG ENERGY, INC. NRG 0001322455 Schaumburg Anne C 804 CARNEGIE CENTER PRINCETON NJ 08540 1 0 Common Stock, par value $.01 per share 2023-11-01 4 A 0 539.0000 0 A 101114.0000 D Common Stock, par value $.01 per share 2023-12-15 4 A 0 462.0000 0 A 101576.0000 D Represents dividend equivalent rights accrued on the Reporting Person's deferred stock units, which become exercisable proportionately with the deferred stock units to which they relate and may only be settled in NRG common stock. Each dividend equivalent right is the economic equivalent of one share of NRG common stock. Reflects a de minimus adjustment of 2 securities beneficially owned following reported transaction as a result of rounding fractional shares. Includes 8,575 dividend equivalent rights. This acquistion is being reported late due to an inadvertent clerical error and not any error of the Reporting Person. Represents 462 Deferred Stock Units issued to the Reporting Person under NRG Energy, Inc.'s Amended and Restated Long-Term Incentive Plan resulting from a supplemental grant in connection with an increase in equity compensation. Each Deferred Stock Unit is equivalent in value to one share of NRG Energy, Inc.'s Common Stock, par value $.01 per share. The Reporting Person will receive from NRG Energy, Inc. one such share of Common Stock for each Deferred Stock Unit he owns upon termination of service on NRG Energy, Inc.'s Board of Directors. Christine Zoino, by Power of Attorney 2023-12-19