[144] Core Natural Resources, Inc. SEC Filing

Rhea-AI Filing Summary

Core Natural Resources, Inc. (CNR) insider submitted a Form 144 notifying a proposed sale of 3,043 common shares through Morgan Stanley Smith Barney, with an aggregate market value of $234,524.01. The shares represent approximately 0.0059% of the 51,471,519 shares outstanding and are scheduled for sale on 09/17/2025 on the NYSE.

The shares were acquired via restricted stock vesting: 1,651 shares on 01/13/2025 and 1,392 shares on 02/09/2024. The filer reports no other sales in the past three months and certifies no undisclosed material adverse information.

Positive

• Transparency and compliance: The filer provided full Form 144 disclosure including broker, acquisition dates, and certification.
• Immaterial size: The proposed sale equals ~0.0059% of outstanding shares, unlikely to affect market valuation.

Negative

• Insider selling: Shares originate from restricted stock vesting, indicating an insider is monetizing compensation, which some investors view negatively.

Insights

Securities Analyst

TL;DR Insider plans to sell a very small stake (3,043 shares, ~0.006% of float) from recently vested restricted stock.

The sale size is immaterial to overall capitalization and is consistent with routine post-vesting liquidity events. Because the shares stem from restricted stock vesting, this appears to be disposition of compensation-related holdings rather than a sale triggered by operational concerns. The filing includes standard compliance representations and shows no prior sales in the preceding three months, which reduces signals of accelerated insider liquidation.

Corporate Governance Expert

TL;DR Form 144 disclosure demonstrates regulatory compliance but reflects an insider monetizing vested compensation.

The transaction is documented with broker details and acquisition dates, supporting transparency. From a governance perspective, routine sales of recently vested restricted stock are common and not necessarily indicative of governance or performance issues. The filer’s representation of no undisclosed material adverse information is standard; there is no evidence in this filing of material corporate developments.

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	3043	234524.01	51471519	09/17/2025	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	01/13/2025	Restricted stock vesting under a registered plan	Issuer			1651	09/17/2025	Not Applicable
Common	02/09/2024	Restricted stock vesting under a registered plan	Issuer			1392	09/17/2025	Not Applicable

* 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

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

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 Core Natural Resources (CNR) Form 144 disclose?

The filing notifies a proposed sale of 3,043 common shares valued at $234,524.01, to be executed on 09/17/2025 via Morgan Stanley Smith Barney.

How many shares does the sale represent relative to CNR outstanding shares?

The sale represents approximately 0.0059% of the 51,471,519 shares outstanding.

How were the shares acquired by the seller?

The shares were acquired through restricted stock vesting: 1,651 shares on 01/13/2025 and 1,392 shares on 02/09/2024.

Did the filer sell any CNR shares in the past three months?

The filing states "Nothing to Report" for securities sold during the past three months.

Which broker is handling the proposed sale?

The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services located at 1 New York Plaza, New York, NY.