Core Natural Resources corrects insider share totals

Core Natural Resources, Inc. filed an amended insider report updating President & CFO Miteshkumar Thakkar’s direct holdings after earlier clerical rounding errors.

Accepted by SEC EDGAR 02/23/2026 - 04:17 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Core Natural Resources, Inc. filed an amended insider report updating President & CFO Miteshkumar Thakkar’s direct holdings after earlier clerical rounding errors. As corrected, he beneficially owns 61,661 shares of common stock, of which 18,624 shares are unvested restricted stock units.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Thakkar Miteshkumar

Role President & CFO

Type	Security	Shares	Price	Value
Holding	Common stock, par value $0.01 per share	--	--	--

Holdings: Common stock, par value $0.01 per share — 61,661 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 61,661, of which 18,624 shares represent unvested restricted stock units.

FAQ

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

What does Core Natural Resources (CNR) disclose in this amended Form 4/A?

The amended filing corrects a prior reporting error for President & CFO Miteshkumar Thakkar. It updates the total number of common shares he beneficially owns and the portion represented by unvested restricted stock units, following discovery of immaterial clerical rounding mistakes.

How many Core Natural Resources (CNR) shares does Miteshkumar Thakkar now beneficially own?

The filing states that Miteshkumar Thakkar now beneficially owns 61,661 shares of Core Natural Resources common stock. This total reflects a corrected figure after earlier rounding-related clerical errors in a previously filed Form 4 for his holdings.

How many unvested restricted stock units does the CNR President & CFO hold?

According to the amendment, 18,624 shares of the 61,661 total represent unvested restricted stock units. These RSUs are part of Miteshkumar Thakkar’s equity compensation and are included within his overall beneficial ownership reported in the corrected Form 4/A.

Why did Core Natural Resources (CNR) need to amend this Form 4 for Miteshkumar Thakkar?

The company reports that earlier disclosures contained immaterial clerical rounding errors. Those mistakes led to incorrect totals for directly beneficially owned shares and unvested restricted stock units, prompting this Form 4/A to present the accurate ownership amounts for the President & CFO.

Does the CNR Form 4/A describe any new stock transactions by the President & CFO?

The document characterizes the entry as a holdings-related correction rather than using standard buy or sell codes. It focuses on fixing previously misreported totals for directly beneficially owned shares and unvested restricted stock units, rather than detailing a new purchase or sale event.

What was incorrect in the prior Core Natural Resources (CNR) Form 4 filing?

The earlier Form 4 inadvertently misstated the total amount of securities directly beneficially owned and the amount of unvested restricted stock units. The amended filing explains that these inaccuracies stemmed from immaterial clerical rounding errors that have now been corrected in the updated share figures.

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

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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)
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								61,661(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 61,661, of which 18,624 shares represent unvested restricted stock units.

	/s/ Rosemary L. Klein, Attorney-in-Fact for Miteshkumar Thakkar	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.