Core Natural Resources, Inc 8-K, filed May 4, 2026
Core Natural Resources, Inc. (CNR)
8-K
2026-05-04
For: 2026-04-29
View Original
Added on
May 04, 2026
About this 8-K
Core Natural Resources, Inc filed this 8-K on May 4, 2026, reporting on events of April 29, 2026.
Items reported
- Item 1.04: Mine safety shutdown or violations
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported): April 29, 2026
(Exact name of registrant as specified in its charter)
| (State or other jurisdiction of incorporation) | (Commission File Number) | (IRS Employer Identification No.) | ||||||||||||
(Address of principal executive offices)
(Zip code)
Registrant's telephone number, including area code:
(724 ) 416-8300
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
Securities registered pursuant to Section 12(b) of the Act:
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered | ||||||
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Item 1.04 Mine Safety – Reporting of Shutdowns and Patterns of Violations.
On April 29, 2026, Mingo Logan Coal LLC, a subsidiary of Core Natural Resources, Inc., received an imminent danger order under section 107(a) of the Federal Mine Safety and Health Act of 1977 at the Mountaineer II mine located in Logan County, West Virginia. The order states that an inspector found an accumulation of elevated methane levels at an air intake entry while equipment was energized in the mining section. Methane levels between the intake entry and the stopping line at certain crosscuts were in excess of 5.0%, and methane levels varied in the center of the intake entry from 1.0% to 2.2%. Mine personnel promptly took appropriate actions to alleviate the condition and to restore acceptable methane levels. The Mine Safety and Health Administration terminated the 107(a) order on the same day, and no injuries or illnesses resulted from the temporary condition.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
| Core Natural Resources, Inc. | ||||||||
| (Registrant) | ||||||||
| By: | /s/ MITESHKUMAR B. THAKKAR | |||||||
| Miteshkumar B. Thakkar | ||||||||
| President and Chief Financial Officer | ||||||||
Dated: May 4, 2026