Welcome to our dedicated page for Core Natural SEC filings (Ticker: CNR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Core Natural Resources, Inc. (NYSE: CNR) files a range of documents with the U.S. Securities and Exchange Commission that describe its coal operations, financial performance, risks, and corporate actions. As a registrant with common stock listed on the New York Stock Exchange, the company submits annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K, along with exhibits and investor presentations.
In its 8-K filings, Core Natural Resources has reported quarterly results, leadership changes, financing arrangements, operational updates, and mine safety events. Examples include 8-Ks announcing second and third quarter 2025 financial results, an 8-K describing the appointment of a new chief executive officer and the related separation arrangements for the prior CEO, and an 8-K detailing a refinancing of tax-exempt bonds originally issued by its predecessor companies. Another 8-K outlines a receivables financing agreement and related sale and contribution agreements involving trade receivables.
Filings also address mine operations and safety. One 8-K reports an imminent danger order issued under section 107(a) of the Federal Mine Safety and Health Act at the Mountaineer II mine in West Virginia due to elevated methane levels in an isolated section, noting that mine personnel took actions to restore acceptable levels and that the order was terminated without injuries or illnesses. Other 8-Ks furnish press releases on efforts to resume longwall operations at the Leer South mine and the eventual resumption of those operations.
On this SEC filings page, users can review Core Natural Resources’ Forms 10-K and 10-Q for detailed financial statements, segment information for metallurgical, high calorific value thermal, and Powder River Basin coal operations, and risk factor discussions. They can also access 8-Ks covering earnings releases, financing transactions, governance changes, and mine safety disclosures. AI-powered summaries can help explain lengthy filings, highlight key figures and segment trends, and point out items such as capital return framework details, debt structure changes, and significant operational events described in the underlying documents.
Core Natural Resources, Inc. (CNR) insider John Rothka, the company’s Chief Accounting Officer, reported two automatic sales under a Rule 10b5-1 plan. On 10/08/2025 he sold 1,000 shares at $95, and on 10/09/2025 he sold 1,000 shares at $100, reducing his direct holdings to 9,307 shares. The filing notes the trades were executed under a trading plan adopted on 03/24/2025. Of the remaining shares, 828 are unvested restricted stock units, which limits immediately tradable stock. The Form 4 was signed by an attorney-in-fact on 10/10/2025, and indicates routine, preauthorized sales rather than open-market discretionary trades.
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.
Core Natural Resources, Inc. (CNR) filed a Form 144 notice showing a proposed sale of 1,000 common shares, with an aggregate market value of $92,700, planned for 10/08/2025 on the NYSE. The shares were acquired on 12/12/2019 as Restricted Stock Units & Performance Stock Units from the issuer. The filing lists 51,471,519 shares outstanding, which provides context for the size of the planned sale relative to total shares.
The notice also discloses a sale of 2,500 common shares executed under a 10b5-1 plan on 10/03/2025 for gross proceeds of $225,000. The filer certifies they are not aware of undisclosed material adverse information and includes the standard representations required when relying on a 10b5-1 plan.
Core Natural Resources, Inc. appointed James A. Brock as Chief Executive Officer, effective October 6, 2025. He will also continue to serve as Chair of the Board. On the same date, former CEO and director Paul A. Lang separated from the company and resigned from the Board, moving into a consulting role through December 31, 2025.
Under an expected Separation and Release Agreement, and subject to a general release of claims, Mr. Lang will receive a lump sum cash payment of $7,950,553, plus 18 months of COBRA premiums and 36 months of life insurance premiums, in satisfaction of obligations under his prior letter agreement. His outstanding time-vesting RSUs will be settled under existing terms, and his performance-based RSUs will be settled in cash based on target performance at $88.45 per share, the closing stock price on October 6, 2025. He will also receive base salary during the consulting period and reimbursement of certain relocation costs, while remaining subject to confidentiality, non-compete, and non-solicitation covenants.
Insider sale under prearranged plan at Core Natural Resources (CNR)
Chief Accounting Officer John Rothka reported an automatic sale of 2,500 shares of Core Natural Resources common stock on 10/03/2025 at a price of $90 per share under a Rule 10b5-1 trading plan adopted on 03/24/2025. After the sale he beneficially owns 11,307 shares, of which 828 are unvested restricted stock units. The Form 4 was signed by an attorney-in-fact on 10/06/2025.
Core Natural Resources, Inc. filed a Form 144 notifying the proposed sale of 2,500 shares of common stock through Morgan Stanley Smith Barney LLC on or about 10/03/2025. The filing lists an aggregate market value of $214,500.00 and indicates 51,471,519 shares outstanding for the issuer. The shares were acquired on 12/12/2019 as Restricted and Performance Stock Units, and no sales by the holder in the past three months are reported. The filer attests they are not aware of undisclosed material adverse information and the sale is being notified under Rule 144.
Richard A. Navarre, a director of Core Natural Resources, Inc. (CNR), reported a sale of common stock on 09/25/2025. The filing shows 5,000 shares were sold at $82.20 per share to cover tax liabilities arising from the vesting of previously granted restricted stock awards tied to the August 20, 2024 merger agreement. After the sale, the reporting person beneficially owned 21,830 shares, of which 4,576 shares remain unvested restricted stock units. The Form 4 was signed by an attorney-in-fact on 09/26/2025.
Core Natural Resources, Inc. (CNR) reported a Rule 144 notice for the proposed sale of 5,000 common shares by a person whose shares vested under a registered plan on 01/13/2025. The shares are held at Morgan Stanley Smith Barney LLC and the seller plans an approximate sale date of 09/25/2025 on the NYSE. The filing discloses an aggregate market value of $410,975.50 for the shares and states payment for the vested shares was for services rendered. No other sales in the prior three months were reported.
Core Natural Resources director Patrick A. Kriegshauser reported a transaction on 09/17/2025 showing the sale of 3,043 shares of the company's common stock at $77.07 per share. The sale was executed to cover the reporting person's tax liability arising from the vesting of previously granted restricted stock awards tied to the Agreement and Plan of Merger dated August 20, 2024. After the sale, the filing shows the reporting person beneficially owns 23,348 shares, of which 3,348 remain unvested restricted stock units. The Form 4 was signed on 09/18/2025 by an attorney-in-fact.
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.