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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): November 5, 2026

Commission File NumberExact 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 CodeIRS Employer Identification No.

1-32853

DUKE ENERGY CORPORATION

20-2777218

(a Delaware corporation)

525 South Tryon Street

Charlotte, North Carolina 28202

800-488-3853

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:

RegistrantTitle of each classTrading Symbol(s)Name of each exchange on which registered

Duke EnergyCommon Stock, $0.001 par valueDUKNew York Stock Exchange LLC

Duke Energy5.625% Junior Subordinated DebenturesDUKBNew York Stock Exchange LLC

due September 15, 2078

Duke EnergyDepositary SharesDUK PR ANew York Stock Exchange LLC

each representing a 1/1,000th interest in a share of 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $0.001 per share

Duke Energy3.10% Senior Notes due 2028DUK 28ANew York Stock Exchange LLC

Duke Energy3.85% Senior Notes due 2034DUK 34New York Stock Exchange LLC

Duke Energy3.75% Senior Notes due 2031DUK 31ANew York Stock Exchange LLC

Duke EnergyCorporate UnitsDUKUNew York Stock Exchange LLC

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. o

Item 2.02  Results of Operations and Financial Conditions.

On November 5, 2026, Duke Energy Corporation (the "Corporation") will issue and post a news release to its website (duke-energy.com/investors) announcing its financial results for the third quarter ended September 30, 2026. A copy of this news release is attached hereto as Exhibit 99.1. The information in Exhibit 99.1 is being furnished pursuant to this Item 2.02. In accordance with General Instruction B.2 of Form 8-K, the information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed "filed" for the 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 News Release to be issued by Duke Energy Corporation on November 5, 2026 (furnished pursuant to Item 2.02).

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

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.

DUKE ENERGY CORPORATION

/s/ ABIGAIL L. MOTSINGER

Abigail L. Motsinger

Senior Vice President, Chief Accounting Officer and Controller

Dated:November 5, 2026