DUK: 8-K company filing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2026 Commission file number Exact Name of Registrant as Specified in its Charter, State or other Jurisdiction of Incorporation, Address of Principal Executive Offices, Zip Code, and Registrant’s Telephone Number, Including Area Code IRS Employer Identification No. 1-32853 DUKE ENERGY CORPORATION (a Delaware corporation) 525 South Tryon Street Charlotte , North Carolina 28202 800 - 488-3853 20-2777218 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: Registrant Title of each class Trading Symbol(s) Name of each exchange on which registered Duke Energy Common Stock, $0.001 par value DUK New York Stock Exchange LLC Duke Energy 5.625% Junior Subordinated Debentures due September 15, 2078 DUKB New York Stock Exchange LLC Duke Energy Depositary Shares each representing a 1/1,000 th interest in a share of 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $0.001 per share DUK PR A New York Stock Exchange LLC Duke Energy 3.10% Senior Notes due 2028 DUK 28A New York Stock Exchan