Core Natural Resources corrects insider holdings

Core Natural Resources, Inc. executive Slone Deck filed an amended insider report to correct previously misstated share holdings.

Rhea-AI Filing Summary

Core Natural Resources, Inc. executive Slone Deck filed an amended insider report to correct previously misstated share holdings. A prior Form 4 contained immaterial clerical rounding errors in the total directly owned shares and the amount of unvested restricted stock units.

The corrected disclosure states that Deck beneficially owns 70,219 shares of common stock, of which 10,929 shares are unvested restricted stock units. The amendment reflects a clarification of ownership amounts rather than a new buy or sell transaction.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Slone Deck

Role SVP, Strategy & Public Policy

Type	Security	Shares	Price	Value
holding	Common stock, par value $0.01 per share	--	--	--

Holdings After Transaction: Common stock, par value $0.01 per share — 70,219 shares (Direct)

Footnotes (1)

1. F1. On February 19, 2026, due to immaterial clerical rounding errors, the reporting person filed a Form 4 which inadvertently reported an incorrect total amount of securities directly beneficially owned by the reporting person and mistakenly indicated an incorrect amount of unvested restricted stock units owned. The corrected amount of securities beneficially owned by the reporting person is 70,219, of which 10,929 shares represent unvested restricted stock units.

FAQ

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What did Core Natural Resources (CNR) disclose in this amended Form 4?

Core Natural Resources disclosed that Slone Deck corrected previously reported share holdings. The amended filing states he beneficially owns 70,219 common shares, including 10,929 unvested restricted stock units, fixing immaterial clerical rounding errors in an earlier Form 4.

Did Slone Deck buy or sell Core Natural Resources (CNR) shares in this Form 4/A?

No new buy or sell transaction is described. The amendment corrects earlier clerical rounding errors in the number of shares and unvested restricted stock units reported as directly beneficially owned, without indicating any new trade in Core Natural Resources stock.

How many Core Natural Resources (CNR) shares does Slone Deck now report owning?

Slone Deck now reports beneficial ownership of 70,219 Core Natural Resources common shares. Within this total, 10,929 shares are identified as unvested restricted stock units, clarifying and correcting the amounts previously reported due to rounding errors.

What was corrected about the unvested restricted stock units in CNR’s filing?

The filing corrects the number of unvested restricted stock units reported for Slone Deck. It now specifies that 10,929 shares represent unvested restricted stock units, replacing an earlier, incorrect figure caused by immaterial clerical rounding errors in the prior Form 4.

Why did Core Natural Resources (CNR) file an amended Form 4 for Slone Deck?

The amended Form 4 was filed to fix immaterial clerical rounding errors. An earlier report inadvertently misstated both the total directly beneficially owned shares and the amount of unvested restricted stock units, prompting this correction to accurately reflect Slone Deck’s holdings.

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Accepted by SEC EDGAR 02/23/2026 - 04:12 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Slone Deck

(Last) (First) (Middle)

275 TECHNOLOGY DRIVE, SUITE 101

(Street)

CANONSBURG PA 15317

(City) (State) (Zip)

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)
	SVP, Strategy & Public Policy

3. Date of Earliest Transaction (Month/Day/Year)
02/17/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)
02/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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								70,219(1)	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. On February 19, 2026, due to immaterial clerical rounding errors, the reporting person filed a Form 4 which inadvertently reported an incorrect total amount of securities directly beneficially owned by the reporting person and mistakenly indicated an incorrect amount of unvested restricted stock units owned. The corrected amount of securities beneficially owned by the reporting person is 70,219, of which 10,929 shares represent unvested restricted stock units.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Deck Slone	02/23/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.