Core Natural director amends share ownership

Core Natural Resources director Patrick A. Kriegshauser filed an amended Form 4 to correct his reported common stock holdings.

Rhea-AI Filing Summary

Core Natural Resources director Patrick A. Kriegshauser filed an amended Form 4 to correct his reported common stock holdings. A prior Form 4 contained immaterial clerical rounding errors in the total directly owned shares. The corrected amount of securities beneficially owned by him is 24,970 shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider KRIEGSHAUSER PATRICK A

Role Director

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 — 24,970 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. The corrected amount of securities beneficially owned by the reporting person is 24,970.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What change does Core Natural Resources (CNR) report in this Form 4/A?

The Form 4/A for Core Natural Resources updates director Patrick A. Kriegshauser’s directly owned common stock holdings to 24,970 shares. The prior filing contained immaterial clerical rounding errors in the reported beneficial ownership total, with no new buy or sell transaction disclosed.

Did Patrick A. Kriegshauser buy or sell Core Natural (CNR) shares in this amendment?

No, the Form 4/A does not report a new purchase or sale of Core Natural shares. It solely corrects the previously reported total of directly beneficially owned common stock to 24,970 shares after identifying minor clerical rounding errors in the earlier Form 4.

What is the corrected Core Natural (CNR) share count owned by the director?

After the correction, director Patrick A. Kriegshauser is shown as directly beneficially owning 24,970 shares of Core Natural Resources common stock. This updated figure replaces an inaccurately rounded total that had been inadvertently reported in the earlier Form 4 filing.

Why did Core Natural (CNR) file an amended Form 4/A for the director?

The amended Form 4/A was filed because the prior Form 4 contained immaterial clerical rounding errors in the total shares owned. The amendment clarifies that Patrick A. Kriegshauser directly beneficially owns 24,970 common shares, ensuring the ownership record is accurate.

Does this Core Natural (CNR) Form 4/A affect insider ownership status?

The Form 4/A refines, but does not fundamentally change, insider ownership status by correcting the total to 24,970 directly owned shares. The filing clarifies earlier rounding mistakes rather than reflecting a new acquisition or disposition of Core Natural Resources common stock.

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Accepted by SEC EDGAR 02/24/2026 - 05:13 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^*

KRIEGSHAUSER PATRICK A

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

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								24,970(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. The corrected amount of securities beneficially owned by the reporting person is 24,970.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Patrick A. Kriegshauser	02/24/2026
	** 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.