[144] Core Natural Resources, Inc. SEC Filing

Rhea-AI Filing Summary

Form 144 notice reports a proposed sale of 1,000 common shares on 10/09/2025 through Morgan Stanley Smith Barney LLC with an aggregate market value of $97,710. The shares were acquired as Restricted and Performance Stock Units on 12/12/2019 and the filer lists 51,471,519 shares outstanding for the issuer. The filing also discloses two recent 10b5-1 plan sales by John Rothka: 1,000 shares on 10/08/2025 for $95,000 and 2,500 shares on 10/03/2025 for $225,000.

The form includes the usual 10b5-1 representation that the seller does not possess undisclosed material adverse information and notes that the securities were originally issued by the issuer. The filing supplies broker details and acquisition/payment dates but does not name the specific beneficial owner on the header fields.

Insights

Corporate Governance Analyst

TL;DR: Scheduled insider sale disclosed under Rule 144, with prior 10b5-1 transactions also reported.

The filing documents a planned Rule 144 sale of 1,000 common shares on 10/09/2025, acquired as Restricted and Performance Stock Units on 12/12/2019. Using a broker and declaring a 10b5-1 plan for past sales aligns with standard insider liquidity practices and formal disclosure requirements.

Key dependencies include adherence to the 10b5-1 plan terms and the seller's attestation that no undisclosed material adverse information exists as of the plan date. Monitor filings for any additional insider filings or material issuer disclosures within the next 30 days.

Equity Markets Analyst

TL;DR: The transaction size is immaterial to public float but continues a sequence of small 10b5-1 sales.

The proposed sale of 1,000 shares represents a very small fraction of the stated 51,471,519 shares outstanding, suggesting limited direct market-impact risk from this single notice. Recent 10b5-1 sales totaling 3,500 shares in early October show ongoing scheduled liquidity rather than a one-time large divestiture.

Market effect will depend on trade execution; watch for trade reports around 10/09/2025 and any contemporaneous issuer announcements that could change trading context within the trading week.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1000	97710.00	51471519	10/09/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	12/12/2019	Restricted and Performance Stock Units	ISSUER			1000	12/12/2019	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for JOHN ROTHKA 275 Technology Drive Suite 101 Canonsburg PA 15317	Common	10/08/2025	1000	95000.00
10b5-1 Sales for JOHN ROTHKA 275 Technology Drive Suite 101 Canonsburg PA 15317	Common	10/03/2025	2500	225000.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the CNR Form 144 disclose about the proposed sale?

The notice reports a proposed sale of 1,000 common shares on 10/09/2025 via Morgan Stanley Smith Barney LLC with aggregate market value $97,710.

When were the shares being sold originally acquired (CNR)?

The shares were acquired as Restricted and Performance Stock Units on 12/12/2019 and payment date is listed as 12/12/2019.

Has the filer recently sold other shares under a 10b5-1 plan?

Yes. The filing lists two 10b5-1 sales by John Rothka: 1,000 shares on 10/08/2025 for $95,000 and 2,500 shares on 10/03/2025 for $225,000.

How large is this sale relative to the issuer's outstanding shares?

The proposed 1,000-share sale is reported against 51,471,519 shares outstanding, a very small percentage of the total.

Does the filing state whether the seller knows of any undisclosed material information?

Yes. By signing, the seller represents they do not know any material adverse information about the issuer that is not publicly disclosed, consistent with Rule 10b5-1 attestations.