Core Natural Resources, Inc.

For the period ended Jan 16, 2025. Filed Jan 16, 2025.

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A notice of a major event between regular reports, such as results, a deal or a change of executives. It is often the first formal record of the news.

Jan 16, 2025 · Filed Jan 16, 2025

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CNR$79.31+5.5%Stored close · as of Nov 6, 2026

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UNITED STATES**

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): January 16, 2025

Core Natural Resources, Inc.

(Exact name of registrant as specified in its charter)

Delaware	001-38147	82-1954058
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS. Employer Identification No.)

275 Technology Drive Suite 101

Canonsburg, Pennsylvania 15317

(Address, including zip code, of principal executive offices)

Registrant’s telephone number, including area code: (724)416-8300

(Former name or former address, if changed since last report)

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:

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.01 par value	CNR	New York Stock Exchange

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 7.01	Regulation FD Disclosure.

On January 16, 2025, Core Natural Resources, Inc. issued a press release regarding an incident at its Leer South mine. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.

The information set forth in this Item 7.01, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section. The information set forth in this Item 7.01, including Exhibit 99.1, shall not be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01	Financial Statements and Exhibits.

(d)	Exhibits

Exhibit No.	Description
99.1	Press release of Core Natural Resources, Inc., dated January 16, 2025.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

SIGNATURES

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: January 16, 2025	CORE NATURAL RESOURCES, INC.
	By:	/s/ Rosemary L. Klein
		Rosemary L. Klein
		Senior Vice President, Chief Legal Officer and Corporate Secretary

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