NOTE 5—ACCRUED LIABILITIES AND OTHER LIABILITIES

Accrued liabilities consisted of the following:

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The Company sponsors a defined contribution plan to assist eligible employees in providing for their future retirement needs. Contribution expenses related to the plan totaled $3.9 million, $4.0 million, and $3.1 million for the years ended December 31, 2025, 2024, and 2023, respectively.

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Other long-term liabilities were comprised primarily of worker’s compensation and occupational disease obligations discussed below.

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Workers’ Compensation and Occupational Disease Obligations

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We are self-insured for certain losses relating to workers’ compensation claims and occupational disease obligations under the Federal Mine Safety and Health Act of 1969, as amended. Starting in 2023, the Company also elected to self-insure employee medical expenses. We purchase insurance coverage to reduce our exposure to significant levels of these claims. Self-insured losses are accrued based upon estimates of the aggregate liability for uninsured claims incurred as of the balance sheet date using claims data and actuarial assumptions. The occupational disease

benefit obligation represents the present value of the actuarially computed liabilities for such benefits over the employees’ applicable years of service.

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As of December 31, 2025, the estimated aggregate liability for claims totaled $10.2 million, including $3.4 million of occupational disease obligations. Of the aggregate liability, $7.4 million was included in Other long-term liabilities on the Consolidated Balance Sheets. In addition, the Company recognized an expected recovery asset of $2.0 million in Other noncurrent assets related to the reimbursement of workers’ compensation amounts that are reimbursable under insurance purchased by the Company. As of December 31, 2024, the estimated aggregate liability totaled $8.3 million, including $2.4 million of occupational disease obligations. Of the aggregate liability, $5.2 million was included in Other long-term liabilities within the Consolidated Balance Sheets.

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The Company recognized an actuarial loss of $0.2 million in the fourth quarter of 2025 related to the annual measurement of our occupational disease benefit obligation, which was due, in part, to the decrease in the discount rate assumption. The occupational disease benefit liability was calculated using a discount rate of 5.6% and 5.9% at December 31, 2025 and 2024, respectively. Disclosures of net periodic benefit cost and estimated future cash payments related to occupational disease benefits have been omitted due to immateriality.