Core Natural SVP updates reported share holdings

Core Natural Resources, Inc. senior vice president of marketing and sales Robert J. Braithwaite Jr. filed an amended insider report to correct his previously reported holdings.

Rhea-AI Filing Summary

Core Natural Resources, Inc. senior vice president of marketing and sales Robert J. Braithwaite Jr. filed an amended insider report to correct his previously reported holdings. The filing states that he directly beneficially owns 16,306 shares of common stock, of which 8,185 shares are unvested restricted stock units. The amendment reflects corrections to earlier clerical rounding errors rather than a new purchase or sale of shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Braithwaite Robert J. Jr.

Role SVP, Marketing & Sales

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 — 16,306 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 16,306, of which 8,185 shares represent unvested restricted stock units.

FAQ

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What does Core Natural Resources (CNR) insider Robert Braithwaite’s Form 4/A report?

The Form 4/A for Core Natural Resources updates Robert J. Braithwaite Jr.’s directly owned common stock to 16,306 shares, including 8,185 unvested restricted stock units. It corrects prior clerical rounding errors rather than reporting a new stock purchase or sale.

Did Core Natural Resources (CNR) insider Robert Braithwaite buy or sell shares in this Form 4/A?

The Form 4/A does not report a new buy or sell transaction. It corrects previously misreported totals, confirming Robert J. Braithwaite Jr. directly beneficially owns 16,306 shares, with 8,185 identified as unvested restricted stock units.

How many Core Natural Resources (CNR) shares does Robert Braithwaite now report owning?

Robert J. Braithwaite Jr. now reports direct beneficial ownership of 16,306 shares of Core Natural Resources common stock. The filing specifies that 8,185 of these shares are unvested restricted stock units, updating earlier figures affected by clerical rounding errors.

What portion of Robert Braithwaite’s Core Natural Resources (CNR) holdings are unvested RSUs?

According to the amended report, 8,185 shares of Robert J. Braithwaite Jr.’s total 16,306 Core Natural Resources shares are unvested restricted stock units. This clarifies the mix between regular common stock and equity awards in his directly beneficial holdings.

Why did Core Natural Resources (CNR) file an amended Form 4/A for Robert Braithwaite?

The amended filing corrects “immaterial clerical rounding errors” in a prior Form 4. It states that Robert J. Braithwaite Jr. actually owns 16,306 shares directly, including 8,185 unvested restricted stock units, replacing previously misreported ownership amounts.

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Accepted by SEC EDGAR 02/23/2026 - 04:18 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^*

Braithwaite Robert J. Jr.

(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, Marketing & Sales

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								16,306(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 16,306, of which 8,185 shares represent unvested restricted stock units.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Robert J. Braithwaite, Jr.	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.