Nature of Business and Basis of Presentation	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Basis of Presentation	Nature of Business and Basis of Presentation General NRG Energy, Inc., or NRG or the Company, provides electricity, natural gas, and smart-home technology solutions to approximately 8 million residential customers (comprised of 6 million retail energy and 2 million smart home), in addition to large commercial and industrial, data center, and wholesale customers. Across North America, NRG is redefining customers’ experience with energy under brand names such as NRG, Reliant, Direct Energy, Green Mountain Energy, and Vivint. As of June 30, 2026, the Company’s core power and natural gas business consists of approximately 25 GW of competitive power generation, including approximately 13 GW from the LSP Portfolio, and a natural gas portfolio that serves approximately 1,900 MMDth annually. On January 30, 2026, NRG completed the acquisition of the LSP Portfolio. The LSP Portfolio includes 18 natural gas-fired and dual fuel facilities totaling approximately 13 GW of capacity, located across nine states, as well as CPower, a leading demand response platform. The acquired operations of the LSP Portfolio are integrated into the existing NRG segment structure. Plant and market operations are combined into the corresponding geographical segments of Texas and East. The East segment also includes the customer operations of CPower. The Company’s business is segmented as follows: •Texas, which includes all activity related to customer, plant and market operations in Texas; •East, which includes all activity related to customer, plant and market operations in the East, and demand response; •West/Other, which includes the following assets and activities: (i) all activity related to customer, plant and market operations in the West and Canada, and (ii) other investments; •Vivint Smart Home; and •Corporate activities. The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with the SEC’s regulations for interim financial information and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The following notes should be read in conjunction with the accounting policies and other disclosures as set forth in the notes to the consolidated financial statements in the Company’s 2025 Form 10-K. Interim results are not necessarily indicative of results for a full year. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all material adjustments consisting of normal and recurring accruals necessary to present fairly the Company’s consolidated balance sheets as of June 30, 2026, and the results of operations, comprehensive income, cash flows and stockholders’ equity for the three and six months ended June 30, 2026 and 2025. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Reclassifications Certain prior period amounts have been reclassified for comparative purposes. The reclassifications did not affect consolidated results of operations, net assets or consolidated cash flows.

NRG Energy, Inc., or NRG or the Company, provides electricity, natural gas, and smart-home technology solutions to approximately 8 million residential customers (comprised of 6 million retail energy and 2 million smart home), in addition to large commercial and industrial, data center, and wholesale customers. Across North America, NRG is redefining customers’ experience with energy under brand names such as NRG, Reliant, Direct Energy, Green Mountain Energy, and Vivint. As of June 30, 2026, the Company’s core power and natural gas business consists of approximately 25 GW of competitive power generation, including approximately 13 GW from the LSP Portfolio, and a natural gas portfolio that serves approximately 1,900 MMDth annually.

On January 30, 2026, NRG completed the acquisition of the LSP Portfolio. The LSP Portfolio includes 18 natural gas-fired and dual fuel facilities totaling approximately 13 GW of capacity, located across nine states, as well as CPower, a leading demand response platform. The acquired operations of the LSP Portfolio are integrated into the existing NRG segment structure. Plant and market operations are combined into the corresponding geographical segments of Texas and East. The East segment also includes the customer operations of CPower.

•West/Other, which includes the following assets and activities: (i) all activity related to customer, plant and market operations in the West and Canada, and (ii) other investments;

The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with the SEC’s regulations for interim financial information and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The following notes should be read in conjunction with the accounting policies and other disclosures as set forth in the notes to the consolidated financial statements in the Company’s 2025 Form 10-K. Interim results are not necessarily indicative of results for a full year.

In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all material adjustments consisting of normal and recurring accruals necessary to present fairly the Company’s consolidated balance sheets as of June 30, 2026, and the results of operations, comprehensive income, cash flows and stockholders’ equity for the three and six months ended June 30, 2026 and 2025.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Certain prior period amounts have been reclassified for comparative purposes. The reclassifications did not affect consolidated results of operations, net assets or consolidated cash flows.