Core Natural SVP awarded 5,060 RSUs

Core Natural Resources, Inc. senior vice president and chief legal officer Rosemary L. Klein reported equity compensation and related tax-withholding transactions.

Rhea-AI Filing Summary

Core Natural Resources, Inc. senior vice president and chief legal officer Rosemary L. Klein reported equity compensation and related tax-withholding transactions. On February 17, 2026, she acquired 5,060 restricted stock units at $0.00 per unit, vesting in three equal annual installments. On February 18, 2026, she disposed of 497 and 746 shares of common stock at $88.96 per share to cover tax liabilities from vesting RSUs. After these transactions, she directly held 68,667 shares of common stock, including 11,033 unvested restricted stock units.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Klein Rosemary L

Role SVP, CLO & Corp. Sec.

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common stock, par value $0.01 per share	497	$88.96	$44K
Exercise Price or Tax Liability	Common stock, par value $0.01 per share	746	$88.96	$66K
Grant/Award	Common stock, par value $0.01 per share	5,060	$0.00	$0.00

Holdings After Transaction: Common stock, par value $0.01 per share — 68,667 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 her.
3. F3. Of the 68,667 shares reported, 11,033 are unvested restricted stock units.

FAQ

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

What did CNR insider Rosemary Klein report in this Form 4?

Rosemary Klein reported an equity award and tax-related share dispositions. She received 5,060 restricted stock units and had 1,243 shares withheld at $88.96 per share to satisfy tax obligations from previously granted RSUs that vested.

How many restricted stock units did CNR grant to Rosemary Klein?

Core Natural Resources granted Rosemary Klein 5,060 restricted stock units. These units were awarded under the company’s Omnibus Performance Incentive Plan and vest in three equal annual installments, beginning on the first anniversary of the grant date, subject to standard vesting conditions.

Were Rosemary Klein’s CNR share disposals open-market sales?

No, the reported disposals were not open-market sales. The 497 and 746 shares were withheld by the company at $88.96 per share to cover Klein’s tax liability arising from the vesting of previously granted restricted stock units.

What is Rosemary Klein’s CNR share ownership after these transactions?

After these transactions, Rosemary Klein directly holds 68,667 shares of Core Natural Resources common stock. Of this total, 11,033 represent unvested restricted stock units, which are subject to future vesting before becoming fully deliverable shares.

How do the new RSUs granted to Rosemary Klein at CNR vest?

The 5,060 restricted stock units granted to Klein vest annually in three equal installments. Vesting begins on the first anniversary of the grant date, with each unit representing a contingent right to receive one share of Core Natural Resources common stock upon vesting.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/19/2026 - 08:01 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^*

Klein Rosemary L

(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, CLO & Corp. Sec.

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		5,060(1)	A	$0	69,910	D
Common stock, par value $0.01 per share	02/18/2026		F		497(2)	D	$88.96	69,413	D
Common stock, par value $0.01 per share	02/18/2026		F		746(2)	D	$88.96	68,667(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 her.

3. Of the 68,667 shares reported, 11,033 are unvested restricted stock units.

	/s/ Rosemary L. Klein	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.