# Core Natural Resources, Inc.: Form 10-K/A for the period ended Dec 31, 2025

- Company: [Core Natural Resources, Inc.](/companies/cnr.md) (CIK 1710366)
- Form: 10-K/A
- Filed: 2026-02-27
- Accepted by EDGAR: Feb 27, 2026, 16:23 ET
- Period: 2025-12-31
- Accession: 0001710366-26-000009
- Inline XBRL: yes
- Main document: https://www.sec.gov/Archives/edgar/data/1710366/000171036626000009/cnr-20251231.htm
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/1710366/000171036626000009/

## Sections

No standard item headings were found in this filing’s main document, so no sections were extracted. Read the original on sec.gov. https://www.sec.gov/Archives/edgar/data/1710366/000171036626000009/cnr-20251231.htm

Filed Feb 27, 2026.
Source: SEC EDGAR, the filing index for accession 0001710366-26-000009. Last ingested by Listed: Oct 24, 2026, 15:15 ET. No prices; not investment advice.