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): September 24, 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:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Appointment of Joyce Mullen to the Board of Directors

On September 24, 2026, the Board of Directors (the “Board”) of Duke Energy Corporation (the “Corporation”) appointed Joyce Mullen to the Board, effective September 28, 2026, with an initial term expiring at the 2027 Annual Meeting of Shareholders. The Board also appointed Ms. Mullen to the Audit Committee and the Operations and Nuclear Oversight Committee of the Board, effective September 28, 2026.

Ms. Mullen retired as president and chief executive officer of Insight Enterprises, Inc. (“Insight”), a Fortune 500 technology company, in April 2026 and continues to advise Insight’s leadership as executive vice president of strategic development. She joined Insight in October 2020 as president of North America. Before joining Insight, Ms. Mullen held several executive positions at Dell Technologies, where she led organizations encompassing sales, operations, supply chain, partner strategy, services delivery and logistics. Earlier in her career, she held leadership positions at Cummins Engine Company. Ms. Mullen also serves on the board of directors of The Toro Company.

The Board has affirmatively determined that Ms. Mullen is independent pursuant to the Corporation’s Standards for Assessing Director Independence, the listing standards of the New York Stock Exchange and the rules and regulations of the U.S. Securities and Exchange Commission.

As a non-employee director of the Corporation, Ms. Mullen will receive a pro-rated payment of the cash and stock annual retainer and will be eligible for other retainers, if applicable, in accordance with the Corporation’s Director Compensation Program, as set forth on Exhibit 10.1 of the Corporation’s Form 10-Q, filed with the SEC on August 4, 2026. Ms. Mullen will also be eligible to participate in the Corporation’s Directors’ Savings Plan, which is described in the Annual Proxy Statement filed with the SEC on March 20, 2026, and will be subject to the Corporation’s Stock Ownership Guidelines, which require outside directors to own common stock, or common stock equivalents, of the Corporation with a value equal to at least five times the annual Board cash retainer (i.e., an ownership level of $700,000) or retain 50% of their vested annual equity retainer.

There are no arrangements or understandings between Ms. Mullen and any other person pursuant to which Ms. Mullen was appointed to the Board. There are no transactions in which Ms. Mullen has or will have an interest that would be required to be disclosed pursuant to Item 404(a) of Regulation S-K under the Securities Exchange Act of 1934, as amended, at this time.

Item 8.01. Other Events.

On September 25, 2026, the Corporation issued a press release announcing Ms. Mullen’s appointment to the Board. A copy of the press release is attached hereto as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

SIGNATURE

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.