Core Natural Resources (CNR) director corrects reported share holdings

Rhea-AI Filing Summary

Core Natural Resources, Inc. director Perera Valli filed an amended insider report to correct a prior clerical error in reported share ownership. The filing states that due to immaterial rounding errors, a previous Form 4 showed an incorrect total. The corrected amount of common stock directly beneficially owned is now reported as 9,329 shares, with no new buy or sell transaction indicated.

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

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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^*

Perera Valli

(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								9,329(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 9,329.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Valli Perera	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.

FAQ

What does Core Natural Resources (CNR) Form 4/A for Perera Valli report?

The Form 4/A reports a correction of Perera Valli’s directly beneficially owned shares. A prior filing contained immaterial clerical rounding errors, and the updated insider ownership is now correctly stated as 9,329 shares of Core Natural Resources common stock.

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

No new buy or sell transaction is indicated in this Form 4/A. The amendment corrects previously reported ownership figures caused by immaterial clerical rounding errors, updating Perera Valli’s directly beneficially owned position to 9,329 shares.

Why was Core Natural Resources (CNR) insider Perera Valli’s Form 4 amended?

The amendment was filed because a prior Form 4 contained immaterial clerical rounding errors. The corrected filing updates the total number of Core Natural Resources shares that Perera Valli directly beneficially owns, revising it to an accurate figure of 9,329 shares.

How many Core Natural Resources (CNR) shares does Perera Valli now report owning?

Perera Valli now reports direct beneficial ownership of 9,329 shares of Core Natural Resources common stock. This figure replaces an incorrectly rounded amount that was inadvertently reported in a previous Form 4 filing dated February 19, 2026.

Does the Core Natural Resources (CNR) Form 4/A indicate any change in insider ownership beyond the correction?

The Form 4/A reflects only a correction to previously misreported totals due to rounding errors. It restates Perera Valli’s direct beneficial ownership as 9,329 shares, without disclosing any new acquisition or disposition of Core Natural Resources stock.