Welcome to our dedicated page for Core Natural Resources 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. filings document the company's coal operating results, mine-safety disclosures, governance votes and Regulation FD communications. Form 8-K reports include quarterly earnings releases, investor presentations, updates on longwall operations at Leer South and West Elk, and mine-safety events reported under the Federal Mine Safety and Health Act.
Proxy and annual meeting materials cover director elections, auditor ratification, executive compensation votes, common-stock voting matters and related governance disclosures. The filings also provide formal records of capital-structure information, operating and financial results, and material events affecting the company's metallurgical and thermal coal operations.
FMR LLC filed an Amendment No. 3 to a Schedule 13G/A reporting beneficial ownership of 4,045,764.99 shares of Core Natural Resources Inc. The filing states this represents 8.0% of the class and that FMR LLC has sole dispositive power over 4,045,764.99 shares. The filing identifies the issuer's address and CUSIP 218937100, and notes a power of attorney and an attached Exhibit 99 agreement.
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.
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.