Core Natural Resources, Inc. filings document the company's coal operating results, mine-safety disclosures, governance votes and Regulation FD communications. Form 8-K reports include quarterly earnings releases, investor presentations, updates on longwall operations at Leer South and West Elk, and mine-safety events reported under the Federal Mine Safety and Health Act.
Proxy and annual meeting materials cover director elections, auditor ratification, executive compensation votes, common-stock voting matters and related governance disclosures. The filings also provide formal records of capital-structure information, operating and financial results, and material events affecting the company's metallurgical and thermal coal operations.
Core Natural Resources, Inc. executive Schuller George John Jr., SVP and Chief Operating Officer, filed an amended Form 4 to correct previously reported share ownership. A prior filing contained immaterial clerical rounding errors in the total amount of securities directly beneficially owned and in the amount of unvested restricted stock units.
The corrected figure shows he beneficially owns 27,344 shares of common stock, of which 16,280 shares are unvested restricted stock units. This amendment updates ownership information rather than reporting a new purchase or sale.
Core Natural Resources, Inc. Chief Accounting Officer John Rothka filed an amended Form 4 to correct earlier clerical errors in his reported equity holdings. The amendment confirms that on February 18, 2026, 79 shares of common stock were withheld to satisfy his tax liability.
The filing also updates his directly beneficially owned position to 9,990 shares of common stock, of which 1,314 shares are unvested restricted stock units. The company describes the prior discrepancies as immaterial clerical rounding errors.
Core Natural Resources, Inc. senior vice president of marketing and sales Robert J. Braithwaite Jr. filed an amended insider report to correct his previously reported holdings. The filing states that he directly beneficially owns 16,306 shares of common stock, of which 8,185 shares are unvested restricted stock units. The amendment reflects corrections to earlier clerical rounding errors rather than a new purchase or sale of shares.
Core Natural Resources, Inc. filed an amended Form 4 for executive Rosemary L. Klein to correct previously misstated holdings caused by immaterial clerical rounding errors. The corrected beneficial ownership is 68,679 shares, of which 11,045 are unvested restricted stock units.
This amendment does not reflect new stock purchases or sales; it replaces inaccurate share and RSU amounts reported in an earlier Form 4 filed on February 19, 2026.
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.
Core Natural Resources, Inc. filed an amended insider report to correct previously misreported share holdings for executive Kurt R. Salvatori. Due to earlier clerical rounding errors, the updated filing now shows he directly beneficially owns 24,599 common shares, including 10,455 unvested restricted stock units.
Core Natural Resources, Inc. executive Slone Deck filed an amended insider report to correct previously misstated share holdings. A prior Form 4 contained immaterial clerical rounding errors in the total directly owned shares and the amount of unvested restricted stock units.
The corrected disclosure states that Deck beneficially owns 70,219 shares of common stock, of which 10,929 shares are unvested restricted stock units. The amendment reflects a clarification of ownership amounts rather than a new buy or sell transaction.
Core Natural Resources, Inc. filed an amended Form 4 for Executive Chair and CEO Brock James A to correct earlier clerical errors. The update clarifies that 2,960 shares of common stock were withheld on February 18, 2026 to cover the executive's tax liability. The amendment also states that the corrected amount of securities directly beneficially owned is 266,975 shares, of which 44,640 shares are unvested restricted stock units. These changes revise prior rounding and reporting mistakes rather than recording a new discretionary stock transaction.
Core Natural Resources, Inc. director Patrick A. Kriegshauser reported an equity award in the form of restricted stock units. On February 17, 2026, he acquired 1,610 common-share-equivalent restricted stock units at a stated price of $0.00 per share as a grant or award.
The units were granted under the company’s Omnibus Performance Incentive Plan and vest on the first anniversary of the grant date, with each unit representing a contingent right to receive one share of common stock. After this award, Kriegshauser’s direct holdings total 24,958 shares and units, of which 1,610 are unvested restricted stock units.
Core Natural Resources, Inc. President & CFO Miteshkumar Thakkar reported equity compensation and related tax-withholding transactions in common stock. On February 17, he acquired 8,730 restricted stock units at $0.00 per share under the company’s Omnibus Performance Incentive Plan, vesting in three equal annual installments starting on the first anniversary of the grant date. Each unit represents a contingent right to receive one share of common stock. On February 18, he disposed of 806 and 1,223 shares of common stock at $88.96 per share through tax-withholding dispositions to cover liabilities from previously vested restricted stock units, rather than open-market sales. Following these transactions, he directly holds 61,657 shares of common stock, including 18,620 unvested restricted stock units.