Sec Form 4 Filing - Rothka John @ Core Natural Resources, Inc. - 2025-01-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Rothka John 2. Issuer Name and Ticker or Trading Symbol Core Natural Resources, Inc. [ CNR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Accounting Officer (Last) (First) (Middle) 275 TECHNOLOGY DRIVE, SUITE 101 3. Date of Earliest Transaction (MM/DD/YY) 01/14/2025 (Street) CANONSBURG, PA15317 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common stock, par value $0.01 per share 01/14/2025 A 492 ( 1 ) ( 2 ) ( 3 ) A $ 0 13,600 D Common stock, par value $0.01 per share 01/14/2025 F 140 ( 4 ) D $ 101.95 13,460 D Common stock, par value $0.01 per share 01/14/2025 A 515 ( 1 ) ( 2 ) ( 5 ) A $ 0 13,975 D Common stock, par value $0.01 per share 01/14/2025 F 147 ( 4 ) D $ 101.95 13,828 D Common stock, par value $0.01 per share 01/14/2025 F 849 ( 6 ) D $ 101.95 12,979 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Rothka John 275 TECHNOLOGY DRIVE, SUITE 101 CANONSBURG, PA15317 Chief Accounting Officer Signatures /s/ Rosemary L. Klein, Attorney-in-Fact 01/16/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger, dated as of August 20, 2024 (the "Merger Agreement"), by and among Core Natural Resources, Inc. (formerly known as CONSOL Energy Inc.), a Delaware corporation (the "Company"), Mountain Range Merger Sub Inc., a Delaware corporation and wholly-owned subsidiary of the Company ("Merger Sub") and Arch Resources, Inc., a Delaware corporation ("Arch"), on January 14, 2025, Merger Sub merged with and into Arch, with Arch surviving the merger as a wholly-owned subsidiary of the Company (the "Merger"). At the effective time of the Merger (the "Effective Time"), pursuant to the terms of the Merger Agreement, each (i) restricted stock unit award of the Company held by the Reporting Person that was outstanding immediately prior to the Effective Time fully vested and settled in the number of shares of common stock, par value $0.01 per share, ( 2 )(Continued from footnote 1) of the Company covered by such award and (ii) each performance stock unit ("PSU") of the Company held by the Reporting Person that was outstanding immediately prior to the Effective Time fully vested, was cancelled and automatically converted into the number of shares of common stock, par value $0.01 per share, of the Company covered by such award based on the greater of actual performance and target performance. As such, the number reported consists solely of unrestricted shares of common stock, par value $0.01 per share, of the Company. ( 3 )The Reporting Person's shares of common stock, par value $0.01 per share, of the Company were earned pursuant to the PSUs of the Company granted on February 7, 2023. The Compensation Committee of the Board of Directors certified the results on 01/13/2025, which resulted in 123.20% of the common stock being paid out for each of the PSUs at the Effective Time. ( 4 )Represents shares of common stock withheld to satisfy the Reporting Person's tax liability from the vesting of PSUs previously granted to the Reporting Person that fully vested in connection with the terms of the Merger Agreement. ( 5 )The Reporting Person's shares of common stock, par value $0.01 per share, of the Company were earned pursuant to the PSUs of the Company granted on February 6, 2024. The Compensation Committee of the Board of Directors certified the results on 01/13/2025, which resulted in 100.00% of the common stock being paid out for each of the PSUs at the Effective Time. ( 6 )Represents shares of common stock withheld to satisfy the Reporting Person's tax liability from the vesting of restricted stock units previously granted to the Reporting Person that fully vested in connection with the terms of the Merger Agreement.

Remarks: Exhibit 24 - Power of Attorney.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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