DUK: Company disclosure

Item 7.01. Regulation FD Disclosure. On July 2, 2026, Duke Energy Carolinas, LLC (“DEC”) reached a partial settlement (the “Stipulation”) with the Public Staff – North Carolina Utilities Commission (the “Public Staff”) in connection with DEC's application for adjustment of rates and charges and for Performance Based Regulation (“PBR”) filed with the North Carolina Utilities Commission (“NCUC”) on November 20, 2025. Testimony consistent with the Stipulation will be filed next week. The Stipulation includes, among other things, agreement on certain operating and maintenance costs and project-specific capital expenditures, rider mechanisms, and accounting adjustments. The Stipulation does not include an agreement on return on equity, capital structure, certain capital investments including the overall Multi-Year Rate Plan capital program, depreciation and decommissioning, storm-related cost recovery, or performance incentive mechanisms, among other items. The Stipulation will result in a one-time pre-tax accounting charge of approximately $10 million, to be recognized in the second quarter of 2026. An overview providing additional detail on the Stipulation is attached to this Form 8-K as Exhibit 99.1. The information in Exhibit 99.1 is being furnished pursuant to this Item 7.01 and shall not be deemed “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. 99.1 Duke Energy Carolinas, LLC Fact Sheet Regarding 2026 Partial Stipulation. 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document). SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the regi