Every 8-K that Core Natural Resources, Inc. (CNR) has filed with the SEC in the last 24 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 8-K covers material events a company has to report between its quarterly reports, so if you follow CNR and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full CNR filings page.
Core Natural Resources, Inc. (CNR) announced a planned leadership transition in its finance and operating functions. The board appointed Nathan Tucker as senior vice president and chief financial officer, effective immediately, succeeding Mitesh Thakkar in the CFO role. Thakkar will continue as president and is assuming an expanded role with day-to-day responsibility for the company’s primary operating functions, including operations, marketing, logistics, and long-term strategy.
Tucker, age 39, has served as Core’s vice president of finance since its formation in January 2025, and previously held finance and investor relations roles at CONSOL Energy Inc. The board approved a new compensation package for Tucker, including a $400,000 annual base salary, a target short-term incentive opportunity equal to 65% of base salary, and a long-term incentive opportunity equal to 125% of base salary. He also entered into a severance agreement consistent with those of other executive officers. Core emphasized that these changes are part of a long-term succession process and issued a press release describing the executive succession plan.
Core Natural Resources, Inc. reported strong second-quarter 2026 results, with net income of $126.5 million ($2.51 per diluted share), adjusted EBITDA of $323.6 million and revenue of $1.1 billion. Net cash provided by operating activities was $250.4 million and free cash flow was $148.0 million.
The company completed a full-limit settlement of its Leer South insurance claim, recognizing $125.4 million of proceeds in the quarter and $154.5 million in total. High calorific value thermal volumes rose to 8.4 million tons, generating cash margin per ton of $19.53, while the metallurgical segment sold 2.6 million tons with cash margin per ton of $28.48. Powder River Basin volumes were 10.2 million tons with a modest negative cash margin due to lower shipments and higher fuel costs.
Core returned $68.0 million to stockholders in Q2 through $63.0 million of share repurchases and a $0.10 per share dividend, bringing cumulative returns since February 2025 to $360.1 million and repurchases to 4.3 million shares, roughly 7.9 percent of the initial share count. Liquidity was $1.0 billion at June 30, 2026, including $474.0 million of cash and short-term investments and a small net cash position. 2026 guidance targets total sales of 87.3–92.4 million tons and segment cash costs per ton of $39.00–$40.50 for high C.V. thermal, $86.00–$91.00 for metallurgical and $13.25–$13.75 for the Powder River Basin.
Core Natural Resources, Inc. furnished a new investor presentation outlining its first quarter 2026 performance and strategic outlook. The company reported Q1 2026 net income of $21.0 million, adjusted EBITDA of $179.9 million, and free cash flow of $55.5 million, on revenue of $1.1 billion. Operations were led by strong results at the Leer South and West Elk mines, with the metallurgical segment achieving higher sales margins and the high calorific value thermal segment maintaining solid margins despite elevated electricity costs.
Core highlighted its capital return program, noting $47.0 million returned to stockholders in Q1 2026 and a total of $292.1 million since February 2025, primarily via share repurchases. As of March 31, 2026, the company reported total liquidity of $935 million, cash and cash equivalents of $413 million, net debt of $37 million, and a remaining share repurchase authorization of $733.8 million. Management also emphasized long-term demand for metallurgical and high calorific value thermal coal, optionality in rare earth elements and critical minerals, and growth initiatives in its Innovations business.
Core Natural Resources, Inc. reported a mine safety incident involving its subsidiary, Wolf Run Mining LLC, at the Leer South mine in Barbour County, West Virginia. On May 13, 2026, the Mine Safety and Health Administration (MSHA) issued an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977 after an inspector found elevated methane concentrations in an area of the mine.
MSHA terminated the order early on May 14, 2026. After further discussions with Leer South’s mine management, MSHA determined on May 18, 2026 that an imminent danger had never existed and formally vacated the order.
Core Natural Resources reported a profitable and cash‑generative first quarter of 2026, highlighting improved operations across its coal portfolio. The company earned net income of $21.0 million, or $0.41 per diluted share, on revenues of $1.1 billion, and generated adjusted EBITDA of $179.9 million.
Cash flow was strong, with net cash provided by operating activities of $119.4 million and free cash flow of $55.5 million. Core returned $47.0 million to stockholders in the quarter, including $41.9 million of share repurchases and dividends, and has returned $292.1 million since launching its capital return program in 2025.
Operationally, the metallurgical segment improved margins as cash cost of coal sold per ton fell to $92.35, while the high calorific value thermal and Powder River Basin segments maintained solid cash margins despite weather and volume headwinds. For 2026, Core issued guidance targeting total coal sales of 85.6 to 91.4 million tons and segment cash cost ranges that support continued margin generation.
Core Natural Resources, Inc. reported a mine safety event involving its subsidiary Mingo Logan Coal LLC at the Mountaineer II mine in Logan County, West Virginia. On April 29, 2026, the mine received an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977.
The order followed an inspector’s finding of elevated methane levels at an air intake entry while equipment was energized. Methane between the intake entry and the stopping line at certain crosscuts exceeded 5.0%, and levels in the center of the intake entry ranged from 1.0% to 2.2%. Mine personnel promptly acted to reduce methane and restore acceptable levels.
The Mine Safety and Health Administration terminated the 107(a) order the same day, and no injuries or illnesses resulted from this temporary condition.
Core Natural Resources, Inc. reported results from its Annual Meeting of Stockholders held on April 30, 2026. Stockholders elected eight directors for one-year terms, including new board members Edward L. Doheny II and Ronald C. Keating. As of the March 6, 2026 record date, there were 50,750,366 shares of common stock entitled to vote.
Stockholders ratified Ernst & Young LLP as independent registered public accounting firm for the year ending December 31, 2026, and approved on an advisory basis the compensation paid to named executive officers for 2025. The company also furnished a press release introducing Doheny and Keating and outlining their extensive leadership and board experience.
Core Natural Resources, Inc. reported a Q4 2025 net loss of $79.0 million, or ($1.54) per diluted share, on revenues of $1.042 billion. Despite the loss, adjusted EBITDA reached $103.1 million, reflecting fire and idle-mine costs of $36.4 million partly offset by $23.9 million of insurance proceeds.
The company generated net cash from operating activities of $107.3 million and free cash flow of $27.0 million in the quarter. It returned $26.8 million to stockholders through buybacks and dividends, bringing 2025 capital returns to $245.1 million, and has $775.7 million remaining under its $1.0 billion repurchase authorization.
For 2026, Core guides to total coal sales of 85.6–91.4 million tons across metallurgical, high calorific value thermal, and Powder River Basin segments, with segment cash cost ranges indicating expected margin improvement. Liquidity was strong at $948.9 million as of December 31, 2025, including $432.2 million of cash and cash equivalents.
Core Natural Resources, Inc. reported a mine safety event at its Mountaineer II mine in Logan County, West Virginia. On January 8, 2026, subsidiary Mingo Logan Coal LLC received an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977 after an inspector found elevated methane levels in an isolated section of the mine. Mine personnel took actions to correct the issue and restored acceptable methane levels. The Mine Safety and Health Administration subsequently terminated the 107(a) order, and no injuries or illnesses resulted from this temporary condition.
Core Natural Resources, Inc. disclosed that it has resumed longwall operations at its Leer South mine in West Virginia and provided an update on productivity levels at its West Elk mine in Colorado. This information is contained in a press release dated December 18, 2025, which is furnished as Exhibit 99.1 under Regulation FD and is not deemed filed under Section 18 of the Exchange Act or Sections 11 and 12(a)(2) of the Securities Act.
Core Natural Resources, Inc. furnished an update noting it issued a press release announcing its 2025 third‑quarter results and posted an investor presentation. Both materials are available as exhibits and on the company’s website.
The information is furnished, not filed, and is not subject to Section 18 liabilities. Exhibit 99.1 contains the press release, and Exhibit 99.2 contains the investor presentation.
Core Natural Resources, Inc. appointed James A. Brock as Chief Executive Officer, effective October 6, 2025. He will also continue to serve as Chair of the Board. On the same date, former CEO and director Paul A. Lang separated from the company and resigned from the Board, moving into a consulting role through December 31, 2025.
Under an expected Separation and Release Agreement, and subject to a general release of claims, Mr. Lang will receive a lump sum cash payment of $7,950,553, plus 18 months of COBRA premiums and 36 months of life insurance premiums, in satisfaction of obligations under his prior letter agreement. His outstanding time-vesting RSUs will be settled under existing terms, and his performance-based RSUs will be settled in cash based on target performance at $88.45 per share, the closing stock price on October 6, 2025. He will also receive base salary during the consulting period and reimbursement of certain relocation costs, while remaining subject to confidentiality, non-compete, and non-solicitation covenants.
Core Natural Resources, Inc. (NYSE: CNR) filed a Form 8-K dated June 30, 2025 to furnish a press release (Exhibit 99.1) that updates stakeholders on the company’s ongoing efforts to resume longwall operations at its Leer South mine. No financial statements, earnings figures or forward-looking projections were included in the filing, and management did not characterize the likely timing, cost or production impact associated with the restart.
The disclosure is made under Item 7.01, Regulation FD, indicating management’s intention to keep investors informed while avoiding the “filed” status that would subject the information to Section 18 liability. In Item 9.01, the company lists the furnished press release and the required iXBRL cover page (Exhibit 104). The filing contains no other material events, strategic transactions, or changes in control, nor does it amend previously reported financial data.
Investors should note that the Leer South mine is evidently not yet fully operational, as the company is still working toward resumption of longwall mining. Because production volumes, revenue guidance and cost implications are not disclosed, the magnitude of any operational interruption or subsequent ramp-up cannot be assessed from this filing alone. The 8-K therefore serves primarily as a procedural notice that additional details are available in the accompanying press release rather than a source of quantitative information.