Welcome to our dedicated page for Core Natural SEC filings (Ticker: CNR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Core Natural Resources, Inc. (NYSE: CNR) files a range of documents with the U.S. Securities and Exchange Commission that describe its coal operations, financial performance, risks, and corporate actions. As a registrant with common stock listed on the New York Stock Exchange, the company submits annual reports on Form 10-K, quarterly reports on Form 10-Q, and current reports on Form 8-K, along with exhibits and investor presentations.
In its 8-K filings, Core Natural Resources has reported quarterly results, leadership changes, financing arrangements, operational updates, and mine safety events. Examples include 8-Ks announcing second and third quarter 2025 financial results, an 8-K describing the appointment of a new chief executive officer and the related separation arrangements for the prior CEO, and an 8-K detailing a refinancing of tax-exempt bonds originally issued by its predecessor companies. Another 8-K outlines a receivables financing agreement and related sale and contribution agreements involving trade receivables.
Filings also address mine operations and safety. One 8-K reports an imminent danger order issued under section 107(a) of the Federal Mine Safety and Health Act at the Mountaineer II mine in West Virginia due to elevated methane levels in an isolated section, noting that mine personnel took actions to restore acceptable levels and that the order was terminated without injuries or illnesses. Other 8-Ks furnish press releases on efforts to resume longwall operations at the Leer South mine and the eventual resumption of those operations.
On this SEC filings page, users can review Core Natural Resources’ Forms 10-K and 10-Q for detailed financial statements, segment information for metallurgical, high calorific value thermal, and Powder River Basin coal operations, and risk factor discussions. They can also access 8-Ks covering earnings releases, financing transactions, governance changes, and mine safety disclosures. AI-powered summaries can help explain lengthy filings, highlight key figures and segment trends, and point out items such as capital return framework details, debt structure changes, and significant operational events described in the underlying documents.
Keating Ronald C reported acquisition or exercise transactions in this Form 4 filing.
Core Natural Resources, Inc. director Ronald C. Keating received a compensation grant of 1,390 restricted stock units under the company’s Omnibus Performance Incentive Plan. These units vest on the first anniversary of the grant date, and each unit represents a right to receive one share of common stock.
Doheny Edward L II reported acquisition or exercise transactions in this Form 4 filing.
Core Natural Resources, Inc. director Edward L. Doheny II received an equity grant of 1,390 shares of Common Stock in the form of restricted stock units. The units were granted at no cash cost per share and will vest on the first anniversary of the grant date.
All 1,390 units are unvested and each unit represents a contingent right to receive one share of Core Natural Resources common stock, so the director’s reported post-transaction holding consists entirely of these unvested restricted stock units.
Core Natural Resources, Inc. filed a Form 3 as the initial insider ownership report for director Edward L. Doheny II. The filing lists no reportable transactions or derivative positions, establishing a baseline from which any future changes in his ownership will be measured in later filings.
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 Schedule 13G filing showing Vanguard Capital Management beneficially owns 2,571,695 shares of Common Stock. The filing states this equals 5.06% of the class and lists 382,981 shares as sole voting power.
The filing identifies Vanguard Capital Management and affiliated business divisions as the reporting persons and is signed by Ashley Grim on 04/29/2026.
Core Natural Resources Inc ownership disclosure: Vanguard Portfolio Management reported beneficial ownership of 2,986,027 shares of Common Stock, representing 5.88% of the class as of 03/31/2026. The filing shows sole dispositive power over 2,986,027 shares and sole voting power for 28,145 shares. Vanguard states these holdings include securities held for Vanguard funds and managed accounts; no single other person is reported with over 5%.
Core Natural Resources Inc ownership disclosure: The Vanguard Group filed Amendment No. 7 to its Schedule 13G/A reporting that it beneficially owns 0 shares of Common Stock, representing 0% of the class. The filing notes an internal realignment on January 12, 2026 under SEC Release No. 34-39538, after which certain Vanguard subsidiaries report holdings separately.
Core Natural Resources, Inc. director and Executive Chair/CEO Brock James A reported bona fide gifts of a total of 48,880 shares of common stock on 2026-03-24.
The filing shows 24,440 shares gifted from an indirect holding by the Lee Ann Brock Trust and 24,440 shares gifted from his direct holdings, both at a reported price of $0.00 per share, reflecting non-cash transfers.
After these transactions, he holds 291,415 shares directly, including 44,640 unvested restricted stock units, and also has indirect holdings of 100,000 shares through SLAT-1 and 117,398 shares through GRAT-1. Footnotes state the gifts were made under a long-term strategy for estate planning purposes.
Core Natural Resources, Inc. insider Rosemary L. Klein, SVP, CLO & Corporate Secretary, reported open-market sales of company common stock. On March 19, 2026, she sold 10,000 shares at $105.00 per share and an additional 5,000 shares at $110.62 per share, totaling 15,000 shares.
After these transactions, Klein directly holds 53,679 shares of common stock, of which 11,045 shares are unvested restricted stock units, indicating she retains a meaningful equity stake and ongoing equity-based compensation exposure to the company.