Duke Energy CORP

Regulatory Filings • Nov 20, 2025

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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 20, 2025

| Commission
file number | Registrant, State of
Incorporation or Organization, Address of Principal Executive Offices and Telephone Number | 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 |
| 1-04928 | DUKE ENERGY CAROLINAS, LLC (a North Carolina limited liability company) 525 South Tryon Street Charlotte , North Carolina 28202 800 - 488-3853 | 56-0205520 |
| 1-3382 | DUKE
ENERGY PROGRESS, LLC (a North
Carolina limited liability company) 411
Fayetteville Street Raleigh , North
Carolina 27601 800 - 488-3853 | 56-0165465 |

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 1/1,000th
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 Exchange LLC |
| Duke Energy | 3.85% Senior Notes due 2034 | DUK
34 | New York Stock Exchange LLC |
| Duke Energy | 3.75% Senior Notes due 2031 | DUK31A | New 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. ¨

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Item 7.01. Regulation FD Disclosure.

On November 20, 2025, Duke Energy Carolinas, LLC (“DEC”) and Duke Energy Progress, LLC (“DEP”, and together with DEC, the “Companies”) each filed rate cases with the North Carolina Utilities Commission (“NCUC”) seeking approval for increases in retail revenues. Both filings include requests for Performance Based Regulation mechanisms, featuring a two-year Multi-Year Rate Plan as well as residential decoupling, performance incentive mechanisms, and an earnings sharing mechanism.

If approved by the NCUC, for DEC, the net increase in retail revenues in year one would be approximately $727 million (10.9%), followed by $275 million (4.1%) in year two – a total 15.0% increase; and for DEP, the net increase in retail revenues in year one would be approximately $528 million (10.9%), followed by $200 million (4.1%) in year two – a total 15.1% increase. DEP’s revenue request is net of a proposed Production Tax Credit (“PTC”) Rider, which would flow back monetized PTCs to customers beginning in 2027. DEC already has an established PTC Rider in place.

The Companies have requested the NCUC approve the requested total Year 1 rates to be effective no later than January 1, 2027. Although a procedural schedule has not yet been established by the NCUC, hearings are expected to commence in third-quarter 2026.

An overview providing additional detail on the filings 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 and Duke Energy Progress, LLC Fact Sheet Regarding 2025 Multi-Year Rate Case Filing.

104 Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document).

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SIGNATURE

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

| Date: November 20, 2025 | DUKE ENERGY
CORPORATION — By: | /s/ David S.
Maltz |
| --- | --- | --- |
| | Name: | David S. Maltz |
| | Title: | Vice President, Legal,
Chief Governance Officer and Corporate Secretary |
| | DUKE ENERGY
CAROLINAS, LLC | |
| Date: November 20,
2025 | By: | /s/ David S. Maltz |
| | Name: | David S. Maltz |
| | Title: | Vice President, Legal, Chief
Governance Officer and Corporate Secretary |
| | DUKE ENERGY PROGRESS, LLC | |
| Date: November 20, 2025 | By: | /s/ David S. Maltz |
| | Name: | David S. Maltz |
| | Title: | Vice President, Legal, Chief Governance Officer and
Corporate Secretary |

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Co-Registrant CIK	0000017797
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