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. 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.
Core Natural Resources, Inc. director Richard A. Navarre reported an open-market sale of 6,000 shares of common stock at $91.70 per share. After the transaction, he directly holds 18,034 shares, of which 2,200 are unvested restricted stock units.
Core Natural Resources, Inc. filed Amendment No. 1 to its Annual Report for the year ended December 31, 2025. The sole purpose is to amend Item 15 and Exhibit 96.1 by filing an updated Technical Report Summary for the Leer Complex in West Virginia.
The company explains that the original Technical Report Summary contained incorrect images for Figure 6.3-1 (Stratigraphic Column) and Figure 7.5-1 (Drillhole Collar Locations, Map View). The underlying text and conclusions of the report are unchanged, and no new financial statements are included. As of June 30, 2025, the aggregate value of common stock held by non-affiliates was approximately $3,514,239,816, and shares of common stock outstanding totaled 50,979,544 as of January 30, 2026.
Core Natural Resources, Inc. director Holly K. Koeppel filed an amended Form 4 to correct her reported direct ownership of common stock. A prior Form 4 contained immaterial clerical rounding errors, and the corrected total number of shares directly beneficially owned is now reported as 14,970.
Core Natural Resources, Inc. director Joseph P. Platt Jr. filed an amended insider report to correct a previously misstated share balance. The amendment explains that an earlier Form 4 contained immaterial clerical rounding errors in the total number of common shares directly beneficially owned.
The corrected figure shows that Platt directly owns 40,660 shares of common stock, par value $0.01 per share. The filing does not reflect a new purchase or sale of shares, but instead updates the reported ownership amount to the accurate total.
Core Natural Resources, Inc. director Richard A. Navarre filed an amended Form 4 to correct his reported shareholdings. The filing states that an earlier Form 4 contained immaterial clerical rounding errors and now shows that he directly and beneficially owns 24,034 shares of common stock.
Core Natural Resources, Inc. director Perera Valli filed an amended insider report to correct a prior clerical error in reported share ownership. The filing states that due to immaterial rounding errors, a previous Form 4 showed an incorrect total. The corrected amount of common stock directly beneficially owned is now reported as 9,329 shares, with no new buy or sell transaction indicated.
Core Natural Resources director Patrick A. Kriegshauser filed an amended Form 4 to correct his reported common stock holdings. A prior Form 4 contained immaterial clerical rounding errors in the total directly owned shares. The corrected amount of securities beneficially owned by him is 24,970 shares.