Core Natural Resources, Inc. (CNR) SEC Filings & Earnings Calls

PRB segment negative cash margin due to lower volumes and higher costs.

“PRB cash margin per ton $(0.57) vs $0.75 in Q1.”

PRB Segment Losses

“PRB Segment Analysis Adjusted EBITDA decreased $22 million in the period-to-period comparison, primarily due to a 2.4 million decrease in tons sold and a $1.45 increase in cash cost of coal sold per ton.” · word for word

Tariff and Trade Policy Uncertainty

“While the evolving global trade landscape relating to tariffs and retaliatory trade measures imposed by other countries on U.S. goods has not yet had a significant impact on our business or results of operations as of June 30, 2026, this and the potential for additional changes in U.S. or international trade policy have increased uncertainty regarding the ul”

Black Lung Liability Security Requirement

“In July 2026, the OWCP published proposed rule changes to the Black Lung Benefits Act, which eliminates the 100% collateral requirement for all operators, and proposes a complex financial review to be conducted to calculate a Composite Solvency Score ("CSS") for each operator.” · word for word

Input Cost Inflation (Diesel/Explosives)

“In addition to lower sales tons, cash cost of coal sold per ton was negatively impacted by increased fuel and explosives costs due to higher diesel prices compared to the prior year period.” · word for word

Elevated electricity costs at PAMC due to Arctic outbreak and challenging geology may pressure thermal segment margins.

“Elevated electricity costs at the Pennsylvania Mining Complex stemming from this winter’s Arctic outbreak as well as several weeks of challenging geology at the PAMC.” · word for word

Reduced PRB shipments due to temperate winter could indicate demand softness in thermal coal.

“Reduced shipments in the face of a relatively temperate winter overall.” · word for word

Tariff and Trade Policy Uncertainty

“While the evolving global trade landscape relating to tariffs and retaliatory trade measures imposed by other countries on U.S. goods has not yet had a significant impact on our business or results of operations as of March 31, 2026, this and the potential for additional changes in U.S. or international trade policy have increased uncertainty regarding the u” · word for word

Geopolitical Instability and Middle East Conflict

“Uncertainty in the financial markets, tariffs, foreign conflicts and executive actions by the executive branch of the U.S. Government and certain other foreign nations or sovereignties bring additional potential risks to the Company.” · word for word

Black Lung Liability Security Requirement

“Under the new standard, self-insured coal mine operators are required to post additional security for the Black Lung benefit liabilities. The final rule requires a security amount equal to 100% of a self-insured operator's projected black lung liabilities.” · word for word

Coal price volatility

“Volatility and wide fluctuation in coal prices based upon a number of factors beyond our control” · word for word

Demand decline from steel and power

“decreases in coal consumption patterns for steel production, electric power generation and industrial applications” · word for word

Environmental regulation

“the impact of current and future regulations to address climate change, the discharge, disposal and clean-up of hazardous substances and wastes and employee health and safety on our operating costs as well as on the market for coal” · word for word

Merger integration risk

“the risk that the businesses of the Company and Arch Resources, Inc. will not be integrated successfully; the risk that the anticipated benefits of the merger may not be realized or may take longer to realize than expected” · word for word

Key customer concentration

“our reliance on major customers, our ability to collect payment from our customers and uncertainty in connection with our customer contracts” · word for word

Environmental regulation risk

“Such regulations restricting emissions from coal-fired power plants or other industrial facilities could increase the costs of operating and affect demand for coal as a fuel source, therefore potentially affecting the volume of our sales.” · word for word

Climate change policy risk

“Federal, state and international GHG and climate change initiatives... have and are expected to continue to result in (i) the decreased utilization or accelerated closure of existing coal-fired EGUs...” · word for word

Surety bond market risk

“Any failure to maintain, or our inability to acquire, surety bonds required by federal and state laws or the related collateral required by bond issuers could have a material adverse effect on our ability to produce coal...” · word for word

Idle mine cash costs and fire extinguishment costs at Leer South and West Elk totaled $36.4 million in Q4, impacting profitability.

“adjusted EBITDA 1 of $103.1 million in the quarter, which included fire extinguishment costs at Leer South and idle mine cash costs at Leer South and West Elk totaling $36.4 million” · word for word

Dependence on insurance recoveries from Leer South combustion event for free cash flow and capital returns.

“Core anticipates incremental insurance recoveries stemming from the combustion-related event at Leer South, buoying further the outlook for free cash flow generation and capital returns.” · word for word

Exposure to coal price volatility, particularly seaborne thermal coal pricing which was modestly lower in Q4.

“realized coal revenue per ton sold 1 of $58.11, which was modestly lower than in Q3 due principally to weaker pricing on seaborne shipments.” · word for word

Operational disruption risk from combustion events at Leer South mine; future occurrences could impact production.

“Combustion-related activity was detected in a previously mined area... longwall system had been idle since January 13, 2025.” · word for word

Government shutdown delaying Leer South longwall restart.

“Government shutdown has delayed the planned restart of the Leer South longwall” · word for word

Leer South fire extinguishment and idle mine costs of $18.4M.

“Leer South fire extinguishment and idle mine cash costs of $18.4 million” · word for word

Integration risk from Arch merger

“The Merger joined two proven leadership teams and operating platforms to establish Core, a premier North American coal producer... The Company will continue to obtain information to assist in finalizing the fair values of assets acquired and liabilities assumed, which may differ materially from these preliminary estimates.” · word for word

Coal price volatility

“Coal revenue per ton is fixed or determinable based upon either fixed forward pricing or pricing derived from established indices and adjusted for nominal quality characteristics.”

High debt and interest expense

“Interest Expense $10,606 for Q3 2025 vs $4,664 for Q3 2024.”