X0508 4 2025-09-10 0001013871 NRG ENERGY, INC. NRG 0002049789 Liyanearachchi Dak 804 CARNEGIE CENTER PRINCETON NJ 08540 1 Exec VP, Chief Technology Ofc. 1 Common Stock, par value $.01 per share 2025-09-10 4 S 0 10672.0000 155.0000 D 48571.0000 D This transaction was executed in multiple trades. The price reported reflects the weighted average sale price. 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 transaction was effected. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2025. Christine Zoino, by Power of Attorney 2025-09-11