Core Natural Resources, Inc.

20. Commitments and Contingencies

The Company accrues for cost related to contingencies when a loss is probable and the amount is reasonably determinable. Disclosure of contingencies is included in the financial statements when it is at least reasonably possible that a material loss or an additional material loss in excess of amounts already accrued may be incurred.

The Company is a party to numerous claims and lawsuits with respect to various matters. As of December 31, 2024 and 2023, the Company had accrued $0.0 million and $0.0 million, respectively, for all legal matters. The ultimate resolution of any such legal matter could result in outcomes which may be materially different from amounts the Company has accrued for such matters.

In the normal course of business, the Company is a party to certain financial instruments withoff-balance sheet risk, such as bank letters of credit, performance or surety bonds, and other guarantees and indemnities related to the obligations of affiliated entities which are not reflected in the Consolidated Balance Sheets. However, the underlying liabilities that they secure, such as asset retirement obligations, workers’ compensation liabilities, and other obligations, are reflected in the Consolidated Balance Sheets. As of December 31, 2024, the Company had outstanding surety bonds with a face amount of $469.5 million to secure various obligations and commitments and $75.9 million of letters of credit used to collateralize certain obligations. The Company had posted $5.6 million in cash collateral related to various obligations; this amount is recorded within “Other noncurrent assets” on the Consolidated Balance Sheets.

As of December 31, 2024, the Company’s reclamation-related obligations of $246.4 million were supported by surety bonds of $401.8 million; and the Company has posted $0.6 million in cash collateral related to reclamation surety bonds. This amount is recorded within “Other noncurrent assets” on the Consolidated Balance Sheets. Additionally, through December 31, 2024, the Company has contributed $149.8 million to a fund that will serve to defease the long-term asset retirement obligation for its thermal asset base; this amount is recorded as “Fund for asset retirement obligations” on the Consolidated Balance Sheets. The funds will be utilized for final mine closure reclamation activities.

The Company has unconditional purchase obligations relating to purchases of materials and supplies and capital commitments, other than reserve acquisitions, and is also a party to transportation capacity commitments. The future commitments under these agreements total $234.4 million in 2025, and is immaterial thereafter.