NRG: Other company developments

Item 8.01 Other Events. On July 14, 2026, PJM Interconnection, L.L.C. (“PJM”) announced the results of its capacity auction for the 2028-2029 delivery year. The total cleared power plant generation capacity of NRG Energy, Inc. (the “Company”) in PJM was 6,839 MW at an average clearing price of $325 per MW-day. Forward-Looking Statements This Current Report on Form 8-K includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements are subject to certain risks, uncertainties and assumptions. Although the Company believes that its expectations are reasonable, it can give no assurance that these expectations will prove to be correct, and actual results may vary materially. Factors that could cause actual results to differ materially from those contemplated above include, among others, general economic conditions, hazards customary in the power industry, and the other risks and uncertainties detailed in the Company’s most recent Forms 10-K, 10-Q and 8-K filed with or furnished to the SEC at www.sec.gov . SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. NRG Energy, Inc. (Registrant) By: /s/ Christine A. Zoino Christine A. Zoino Corporate Secretary Dated: July 15, 2026