Core Natural Resources, Inc. (CNR) stock intrinsic value fair value estimate & owner earnings analysis

Core Natural Resources (formerly CONSOL Energy) is a coal producer that changed shape on January 14, 2025, when it closed an all-stock merger with Arch Resources. It now has four parts: high-quality thermal coal (the Pennsylvania Mining Complex and the West Elk mine in Colorado), metallurgical coal for steelmaking (the Leer complex and other mines in West Virginia), Black Thunder and Coal Creek in Wyoming's Powder River Basin, and the Core Marine Terminal in Baltimore. In 2025 coal revenue was $4.13 billion, 56% of it from exports. What we measure. Because the merger roughly doubled the company, only 2025 describes the business as it now exists, and 2025 was a poor year: net loss of $153 million, thermal coal realized $60.34 per ton (down from $65.54) and metallurgical coal realized $102.36 per ton with only about $6 per ton of cash margin. Owner earnings (cash from operations, less working-capital swings, less stock compensation, less the capital spending needed to stand still) were $52.6 million, or $1.02 per share, versus $9.83 per share in 2024 for the pre-merger company. That is a 90% drop, and it needs explaining rather than simply adopting. Two named, one-time items depressed 2025. The company paid about $66 million of merger costs (advisers, severance and similar), which the filing calls non-recurring. And the Leer South longwall was sealed in January 2025 after a combustion incident and did not restart until December 2025, costing $101 million of fire and idling expense, of which $19 million was recovered from insurance. Adding back the $66 million and the $82 million net cost gives a normalized base of roughly $200 million a year, or about $3.90 per share on 2025's 51.4 million shares. We did not add back any lost coal sales during the outage, and we did not assume better prices. For comparison, in the first half of 2026 cash from operations was $370 million, capital spending $175 million and stock compensation $8.6 million, so the level we use is not stretched. We use the 2025 normalized level because the years before the merger describe a smaller business. Growth path. The actual owner-earnings growth in the latest full year was about minus 90%. The base case assumes 0% growth from the normalized level, which is above that trailing figure because the two causes above are dated and documented in the filing (merger costs paid in 2025; the Leer South restart in December 2025). No growth is credited beyond that: price recovery, new mines and share gains have not yet happened, so they are left out. The value of the shares is limited by mine life. Black Thunder holds 331.5 million tons of reserves against 47.4 million tons mined in 2025, about seven years at the current pace, so that mine's contribution ends then (we remove about one-eighth of earnings, which is the Powder River segment's share of 2025 adjusted EBITDA: $64 million of $512 million). The Pennsylvania Mining Complex has 529 million tons of reserves, about 17 years even at the whole thermal segment's 2025 volume of 30.5 million tons, and it supplies most of the company's earning power. The Leer complex has 170 million tons of reserves, including Leer West, which has no immediate development plans. Larger resource estimates exist but are not counted as reserves, so they are excluded. Closure costs are not deducted separately: the $535 million reclamation liability is covered by the roughly $36 million a year of reclamation payments already deducted in owner earnings. Base case, $38.63 per share: about $200 million a year for 7 years, about $175 million a year for the next 8 years (years 8 to 15), about $100 million a year for years 16 to 18 as the Pennsylvania reserves run down, then nothing, discounted at 6% and divided by about 50.5 million shares. The step-downs are our modelling of the reserve figures above, not company guidance. Bear case, $22.79 per share: the same mine-life shape but starting at about $118 million a year, which assumes disruption costs like the Leer South fire keep recurring, so only the merger costs are added back. Underground longwall mines carry combustion and idling risk, and West Elk also incurred $11 million of idling cost in late 2025 while moving to a new coal seam. Debt is modest ($459 million including finance leases, against $601 million of cash and restricted cash at year end), so leverage is not the main risk. Bull case, $71.85 per share: earnings run at about $372 million a year, which is the first-half 2026 result (cash from operations less capital spending and stock compensation, before working-capital changes) doubled to a full year, with the same mine-life shape. This treats two reported quarters as the new level. It is the outcome if the Leer South restart holds and current cash generation persists. Accounting judgements. Working-capital movement covers receivables, inventories, other current assets and payables only; reclamation payments, retiree medical and black-lung obligations stay in owner earnings because they are recurring cash costs. Capital spending from acquired mines in 2025 was treated as maintenance, not growth. Owner earnings for 2016 to 2020 include the minority share of a consolidated partnership, which flatters the per-share figures for 2016 to 2020. What would make this wrong: coal prices, which we neither forecast nor credit, another mine incident, faster loss of Powder River volumes, or the 2026 improvement proving to be temporary.