X0508 4 2026-01-07 0001013871 NRG ENERGY, INC. NRG 0001940921 Chung Bruce 804 CARNEGIE CENTER PRINCETON NJ 08540 1 EVP & CFO 1 Common Stock, par value $.01 per share 2026-01-07 4 S 0 5000.0000 153.2515 D 86530.0000 D Common Stock, par value $.01 per share 2026-01-07 4 S 0 7383.0000 158.7937 D 79147.0000 D These transactions were executed in multiple trades. The prices reported reflect the weighted average sale prices. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. Christine Zoino, by Power of Attorney 2026-01-08