Document

SD 1 cnr12312025formsd.htm SD Document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM SD

SPECIALIZED DISCLOSURE REPORT

Core Natural Resources, Inc.

(Exact name of the registrant as specified in its charter)

Delaware

001-38147

82-1954058

(State or other jurisdiction

of incorporation or organization)

(Commission File Number)

(IRS Employer

Identification No.)

275 Technology Drive, Suite 101

Canonsburg, Pennsylvania 15317

(Address of principal executive offices) (Zip code)

Nathan J. Tucker

Senior Vice President and Chief Financial Officer

(724) 416-8300

(Name and telephone number, including area code, of the person to contact in connection with this report.)

Check the appropriate box to indicate the rule pursuant to which this Form is being submitted, and provide the period to which the information in this Form applies:

☐ Rule 13p-1 under the Securities Exchange Act (17 CFR 240.13p-1) for the reporting period from January 1 to December 31, _____.

☒ Rule 13q-1 under the Securities Exchange Act (17 CFR 240.13q-1) for the fiscal year ended December 31, 2025.

Section 2 - Resource Extraction Issuer Disclosure

Item 2.01 Resource Extraction Issuer Disclosure and Report

Disclosure of Payments by Resource Extraction Issuers

The specified payment disclosure required by this Form is included as Exhibit 99.1 to this Specialized Disclosure Report on Form SD.

Section 3 - Exhibits

Item 3.01 Exhibits

Exhibit No. Description

99.1 Resource Extraction Payment Report as required by Item 2.01 of this Form

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.


			Core Natural Resources, Inc.
			(Registrant)
			By:			/s/ NATHAN J. TUCKER
						Nathan J. Tucker
						Senior Vice President and Chief Financial Officer

Date: September 23, 2026