[Form 4] Core Natural Resources, Inc. Insider Trading Activity

Core Natural Resources, Inc. President & CFO Miteshkumar Thakkar reported equity compensation and related tax-withholding transactions in common stock.

Rhea-AI Filing Summary

Core Natural Resources, Inc. President & CFO Miteshkumar Thakkar reported equity compensation and related tax-withholding transactions in common stock. On February 17, he acquired 8,730 restricted stock units at $0.00 per share under the company’s Omnibus Performance Incentive Plan, vesting in three equal annual installments starting on the first anniversary of the grant date. Each unit represents a contingent right to receive one share of common stock. On February 18, he disposed of 806 and 1,223 shares of common stock at $88.96 per share through tax-withholding dispositions to cover liabilities from previously vested restricted stock units, rather than open-market sales. Following these transactions, he directly holds 61,657 shares of common stock, including 18,620 unvested restricted stock units.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Thakkar Miteshkumar

Role President & CFO

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common stock, par value $0.01 per share	806	$88.96	$72K
Exercise Price or Tax Liability	Common stock, par value $0.01 per share	1,223	$88.96	$109K
Grant/Award	Common stock, par value $0.01 per share	8,730	$0.00	$0.00

Holdings After Transaction: Common stock, par value $0.01 per share — 61,657 shares (Direct)

Footnotes (3)

1. F1. Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
2. F2. Represents shares of common stock withheld to satisfy the Reporting Person's tax liability from the vesting of restricted stock units previously granted to him.
3. F3. Of the 61,657 shares reported, 18,620 are unvested restricted stock units.

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Accepted by SEC EDGAR 02/19/2026 - 08:03 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^*

Thakkar Miteshkumar

(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)
	President & CFO

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

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

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	02/17/2026		A		8,730(1)	A	$0	63,686	D
Common stock, par value $0.01 per share	02/18/2026		F		806(2)	D	$88.96	62,880	D
Common stock, par value $0.01 per share	02/18/2026		F		1,223(2)	D	$88.96	61,657(3)	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. Represents a grant of restricted stock units pursuant to the Issuer's Omnibus Performance Incentive Plan, which vest annually in equal installments over a period of three years, beginning on the first anniversary of the grant date. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

2. Represents shares of common stock withheld to satisfy the Reporting Person's tax liability from the vesting of restricted stock units previously granted to him.

3. Of the 61,657 shares reported, 18,620 are unvested restricted stock units.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Miteshkumar Thakkar	02/19/2026
	** 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.