Fourth Quarter 2025 Earnings Supplement February 12, 2026 FORWARD-LOOKING STATEMENTS This communication contains certain "forward-looking statements" within the meaning of federal securities laws. Forward-looking statements may be identified by words such as "years ahead," "look forward" and similar expressions. Forward-looking statements are not statements of historical fact and reflect Core's current views about future events. No assurances can be given that the forward-looking statements contained in thi ...

Core Company Overview - Core Natural Resources, Inc. (NYSE: CNR) is a leading producer of high-quality metallurgical and thermal coals, operating a portfolio of large-scale, low-cost longwall mines, including the Pennsylvania Mining Complex, Leer, Leer South, and West Elk mines [5] - The company was formed in January 2025 through the merger of CONSOL Energy and Arch Resources, and is headquartered in Canonsburg, Pennsylvania [5] Recent Operational Developments - Core has resumed longwall operations at its Leer South metallurgical mine in West Virginia, which had been idle since January 13, 2025, due to combustion-related activity [1] - The West Elk longwall mine in Colorado is now achieving consistent productivity levels after transitioning to the B-Seam, with expectations for continued improved performance [2] Management Commentary - The chairman and CEO of Core commended the operations team for prioritizing safety during the recovery and restart of the longwall system at Leer South, emphasizing the strategic importance of this asset [3] - The senior vice president and COO highlighted the professionalism and dedication of the operations team, projecting that Leer South will operate efficiently and effectively in 2026 [4] Financial Outlook - Core anticipates a significant improvement in financial performance in 2026 due to the restart at Leer South, improved geological conditions at West Elk, and substantial insurance recoveries related to the combustion event [4] - The company expects to benefit from the cessation of fire-suppression and idling costs at Leer South, as well as ongoing merger-related synergies [4]

Financial Performance - Core reported net income of $31.6 million, or $0.61 per diluted share, and adjusted EBITDA of $141.2 million in Q3 2025, which included $18.4 million of fire extinguishment and idle mine cash costs at Leer South and a $19.4 million initial recovery of insurance proceeds related to the Leer South combustion-related event[6] - The company generated net cash provided by operating activities of $87.9 million and free cash flow of $38.9 million[6] - Core increased cash and cash equivalents by $31.5 million and overall liquidity by $47.5 million[6] Capital Return Program - Core returned $24.6 million to stockholders via share repurchases and quarterly dividends in Q3 2025, increasing the year-to-date capital return total to $218.3 million[6] - Since February 20, 2025, Core has reduced shares outstanding by approximately 5.2%[19] - As of September 30, 2025, Core had $797.4 million of remaining authorization under its existing $1.0 billion share repurchase program[22] Operational Highlights - The company achieved a strong production and sales volume performance at the Pennsylvania Mining Complex[6] - Core transitioned to a more advantageous reserve area at the West Elk mine[6] - The company raised PRB volume guidance again, taking advantage of improving domestic coal generation[6] - Core signed commitments across all segments and all periods totaling nearly 26 million tons[6] - In 2024, the company's sales volume was 85 million tons and revenue was $4.6 billion[7] Market Position and Strategy - The company has a 35% interest in Dominion Terminal Associates ("DTA")[13] - The company has 27 Mtpa export capacity via ownership interests in two marine terminals[13] - The high calorific value thermal segment has a committed book of ~17 million tons and the Powder River Basin segment has a committed book of business of ~40 million tons for delivery in 2026[28]

Financial Performance - The company reported a net loss of $366 million, or $070 per diluted share, but adjusted EBITDA of $1443 million, which included $212 million of fire extinguishment expense at Leer South[7] - Net cash provided by operating activities was $2202 million, and free cash flow was $1311 million[7] - Adjusted EBITDA increased by 17% quarter-over-quarter, rising from $1235 million in Q1 to $1443 million in Q2[14, 15] - Free cash flow increased significantly from $491 million in Q1 to $1311 million in Q2[15] Capital Allocation - The company returned $871 million to investors through share repurchases and dividends in Q2, bringing the year-to-date total to $1937 million[7] - $819 million was invested to repurchase 12 million shares, representing approximately 2% of shares outstanding, at an average price of $6964 per share during Q2[21] - Year-to-date, $1832 million has been invested to repurchase 26 million shares, or about 5% of shares outstanding[21] - As of June 30, 2025, $8168 million remained authorized under the $1 billion share repurchase program[21] Operational Highlights - The company is targeting annual cost savings and operating synergies between $150 million and $170 million following the merger[7, 22] - Powder River Basin segment achieved sales volumes of 126 million tons[16] - High calorific value thermal segment cash cost of coal sold decreased by 8% quarter-over-quarter, from $4278 to $3947 per ton[30]