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. 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. director Joseph P. Platt Jr. reported an equity award on a Form 4. He acquired 1,610 restricted stock units of common stock as a grant under the company’s Omnibus Performance Incentive Plan at a stated price of $0.00 per share.
The restricted stock units 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, he directly holds 40,648 shares of the company’s common stock, including 1,610 unvested restricted stock units.
Core Natural Resources, Inc. Executive Chair and CEO Brock James A reported routine equity compensation activity. On February 17, he received a grant of 21,190 restricted stock units that vest in three equal annual installments, each unit representing one share of common stock. On February 18, he disposed of 66,365 shares and 4,440 shares at $88.96 per share to cover tax liabilities from previously granted RSUs as they vested, rather than through open-market sales. After these transactions he held 266,967 shares directly, including 44,632 unvested RSUs, along with additional indirect holdings through the Lee Ann Brock Trust, SLAT-1, and GRAT-1.
Core Natural Resources SVP Slone Deck reported routine equity compensation and related tax withholding transactions. On February 17, 2026, Deck received a grant of 5,060 restricted stock units that vest in equal annual installments over three years, each unit representing one share of common stock. On February 18, 2026, the company withheld 487 and 731 shares of common stock at $88.96 per share to cover Deck’s tax obligations from previously vesting awards. Following these transactions, Deck held 70,207 shares of common stock directly, including 10,917 unvested restricted stock units.
Core Natural Resources, Inc. director Holly K. Koeppel reported an equity award of company stock. She acquired 1,610 shares of common stock on a grant basis, recorded at a price of $0.00 per share, as part of an incentive arrangement rather than an open-market purchase.
According to the footnotes, this grant consists of restricted stock units issued under the company’s Omnibus Performance Incentive Plan, which vest on the first anniversary of the grant date, with each unit converting into one share of common stock. After this award, Koeppel holds 14,958 shares of common stock in total, including 1,610 unvested restricted stock units.
Core Natural Resources, Inc. reports a transformed business following its January 14, 2025 all‑stock merger of equals between CONSOL Energy and Arch Resources and subsequent rebranding to Core Natural Resources, trading under ticker CNR.
For 2025, the company generated $4,165 million in revenue with total coal production of 87.8 million tons, including 30.5 million tons of high calorific value thermal coal, 8.4 million tons of metallurgical coal and 48.9 million tons from Powder River Basin operations. High‑CV thermal realizations averaged $60.34 per ton, metallurgical coal $102.36 per ton and PRB coal $14.46 per ton.
The company highlights large, long‑life reserves, including 529.0 million tons at the Pennsylvania Mining Complex, 170.2 million tons at the Leer metallurgical complex and 331.5 million tons at Black Thunder, plus extensive additional resources. Management emphasizes safety performance, strong contracted domestic thermal positions, expanded export and metallurgical platforms, and disciplined capital allocation, including a $600 million revolving credit facility and long‑dated tax‑exempt bonds, to support cash generation and potential shareholder returns.
Core Natural Resources, Inc. reported a Q4 2025 net loss of $79.0 million, or ($1.54) per diluted share, on revenues of $1.042 billion. Despite the loss, adjusted EBITDA reached $103.1 million, reflecting fire and idle-mine costs of $36.4 million partly offset by $23.9 million of insurance proceeds.
The company generated net cash from operating activities of $107.3 million and free cash flow of $27.0 million in the quarter. It returned $26.8 million to stockholders through buybacks and dividends, bringing 2025 capital returns to $245.1 million, and has $775.7 million remaining under its $1.0 billion repurchase authorization.
For 2026, Core guides to total coal sales of 85.6–91.4 million tons across metallurgical, high calorific value thermal, and Powder River Basin segments, with segment cash cost ranges indicating expected margin improvement. Liquidity was strong at $948.9 million as of December 31, 2025, including $432.2 million of cash and cash equivalents.
Core Natural Resources, Inc. reported a mine safety event at its Mountaineer II mine in Logan County, West Virginia. On January 8, 2026, subsidiary Mingo Logan Coal LLC received an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977 after an inspector found elevated methane levels in an isolated section of the mine. Mine personnel took actions to correct the issue and restored acceptable methane levels. The Mine Safety and Health Administration subsequently terminated the 107(a) order, and no injuries or illnesses resulted from this temporary condition.
Core Natural Resources, Inc. has a shareholder planning to sell 60000 common shares of the company under Rule 144 through Wells Fargo Clearing Services, with an approximate sale date of 12/18/2025 on the NYSE and an aggregate market value of 5395281.29. The filing notes that 51239470 shares were outstanding.
The securities to be sold were acquired through a 264499 share restricted stock award dated 02/27/2017 from the issuer and a 7500 share open market purchase on 05/09/2025 paid in cash. The same shareholder previously sold 28870 securities of Core Natural Resources, Inc. on 11/13/2025 for gross proceeds of 2427447.15, and represents that they are not aware of undisclosed material adverse information about the issuer.
Core Natural Resources, Inc. disclosed that it has resumed longwall operations at its Leer South mine in West Virginia and provided an update on productivity levels at its West Elk mine in Colorado. This information is contained in a press release dated December 18, 2025, which is furnished as Exhibit 99.1 under Regulation FD and is not deemed filed under Section 18 of the Exchange Act or Sections 11 and 12(a)(2) of the Securities Act.
Core Natural Resources (CNR) reported insider transactions by Executive Chair and CEO James A. Brock. On November 13, 2025, 140,760 common shares were transferred at $0 from a revocable trust for the benefit of his spouse to a spousal lifetime access trust (SLAT-1). The filing also notes 24,440 shares held indirectly via the Lee Ann Brock Trust.
Separately on the same date, the reporting person contributed 117,398 common shares, previously reported as directly owned, to a grantor retained annuity trust (GRAT-1). These estate-planning transfers were reported as indirect holdings and involved no purchase or sale proceeds.