{"url_path":"/sec/nrg/13dg/2026-02-06/000110465926011520","section_key":"body","section_title":"SCHEDULE 13G body","topic":"sec","document":{"doc_type":"SCHEDULE 13G","doc_date":"2026-02-06","source_url":"https://www.sec.gov/Archives/edgar/data/1013871/0001104659-26-011520-index.html","accession_number":"0001104659-26-011520","cik":"0001013871","ticker":"NRG","issuer_name":"NRG ENERGY, INC.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1013871/0001104659-26-011520-index.html","primary_entity_key":"0001013871","primary_entity_name":"NRG ENERGY, INC."},"word_count":347,"has_tables":true,"body_markdown":"EX-99.1\n2\ntm265300d3_ex99-1.htm\nEXHIBIT 99.1\n\n**Exhibit 99.1**\n\n** **\n\n**JOINT FILING AGREEMENT**\n\n**PURSUANT TO RULE 13d-1(k)**\n\nThe undersigned acknowledge\nand agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments\nto this statement on Schedule 13G may be filed on behalf of each of the undersigned without the necessity of filing additional joint\nfiling agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness\nand accuracy of the information concerning him or it contained herein or therein, but shall not be responsible for the completeness and\naccuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information\nis inaccurate.\n\nLightning Power Holdings, LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nFund III Lightning Holdings, LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nGranite Energy, LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nGranite Energy Holdings, LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nLS Power Equity Partners III, L.P\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nSignature:\n/s/ LS Power\nPartners III, L.P.\n\nName/Title:\nLS Partners III L.P./its general partner\n\nDate:\nFebruary 6, 2026\n\nSignature:\n/s/ LS Power\nFund III G.P., LLC\n\nName/Title:\nLS Power Fund III G.P., LLC/its general partner\n\nDate:\nFebruary 6, 2026\n\nLS Power Partners III, L.P.\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nSignature:\n/s/ LS Power\nFund III G.P., LLC\n\nName/Title:\nLS Power Fund III G.P., LLC/its general partner\n\nDate:\nFebruary 6, 2026\n\nLS Power Fund III G.P., LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nLS Power Equity Advisors, LLC\n\nSignature:\n/s/ Jeffrey\nWade\n\nName/Title:\nJeffrey Wade/Chief Compliance Officer\n\nDate:\nFebruary 6, 2026\n\nDavid Nanus\n\nSignature:\n/s/ David Nanus\n\nName/Title:\nDavid Nanus\n\nDate:\nFebruary 6, 2026\n\n** **"}