Core Natural Resources (CNR) accounting chief sells 3,800 shares at $91.62

Rhea-AI Filing Summary

Core Natural Resources, Inc. Chief Accounting Officer John Rothka reported an open-market sale of 3,800 shares of common stock at a weighted average price of $91.62 per share. After the sale, he directly holds 6,190 shares, including 1,314 unvested restricted stock units that continue to represent future equity-based compensation.

Insider Trade Summary

Net Seller: 3,800 shares ($348,156)

Net Sell 1 txn

Insider Rothka John

Role Chief Accounting Officer

Sold 3,800 shs ($348K)

Type	Security	Shares	Price	Value
Sale	Common stock, par value $0.01 per share	3,800	$91.62	$348K

Holdings After Transaction: Common stock, par value $0.01 per share — 6,190 shares (Direct)

Footnotes (1)

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.25 to $91.75, inclusive. The reporting person undertakes to provide to Core Natural Resources, Inc., any security holder of Core Natural Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. Of the 6,190 shares reported, 1,314 are unvested restricted stock units.

Form 4 Insider Transactions: What Each Field Means →

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^*

Rothka John

(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)
	Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

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	03/10/2026		S		3,800	D	$91.62(1)	6,190(2)	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $91.25 to $91.75, inclusive. The reporting person undertakes to provide to Core Natural Resources, Inc., any security holder of Core Natural Resources, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

2. Of the 6,190 shares reported, 1,314 are unvested restricted stock units.

	/s/ Rosemary L. Klein, Attorney-in-Fact for John Rothka	03/11/2026
	** 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 insider transaction did Core Natural Resources (CNR) report?

Core Natural Resources reported that Chief Accounting Officer John Rothka sold 3,800 shares of common stock in an open-market transaction at a weighted average price of $91.62 per share. This Form 4 filing details the sale and his remaining share ownership.

At what price did the CNR officer sell shares in this Form 4?

The officer sold 3,800 Core Natural Resources shares at a weighted average price of $91.62. Individual trade prices ranged from $91.25 to $91.75, with multiple transactions making up the total sale disclosed in the Form 4 filing.

How many Core Natural Resources (CNR) shares does the insider hold after the sale?

After the reported sale, John Rothka directly holds 6,190 Core Natural Resources shares. This total includes 1,314 unvested restricted stock units, which are equity awards that may vest over time subject to applicable service or performance conditions.

What portion of the CNR insider’s holdings are unvested restricted stock units?

Of the 6,190 shares reported as held after the transaction, 1,314 are unvested restricted stock units. These units represent future potential share deliveries rather than currently vested, freely tradable shares in Core Natural Resources, according to the Form 4 footnote.

What type of transaction code appears in this Core Natural Resources Form 4?

The Form 4 uses transaction code “S,” indicating a sale in an open-market or private transaction. This code confirms that the insider disposition involved selling common stock rather than option exercises, gifts, tax withholding, or other non-sale related movements.

Does the Form 4 indicate how CNR shares were traded within the price range?

Yes. The Form 4 explains that the reported price is a weighted average, with shares sold in multiple trades between $91.25 and $91.75. The insider offers to provide detailed breakdowns of share quantities at each specific price upon request.