---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-234041"
form_type: "8-K"
ticker: "CNR"
cik: "0001710366"
company_name: "Core Natural Resources, Inc."
filed_at: "2025-10-08T23:59:59+00:00"
generated_at: "2026-05-17T04:19:34.770685+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Core Natural Resources appoints board chair Jimmy Brock as CEO; Paul Lang departs

## Summary
- James A. Brock appointed CEO effective October 6, 2025, succeeding Paul A. Lang.
- Paul A. Lang separated as CEO and resigned from board; will provide transition consulting through Dec 31, 2025.
- Lang to receive lump sum cash of $7,950,553 plus benefits and RSU settlements per separation agreement.
- Brock previously executive chair since Jan 2025; prior CEO of CONSOL Energy before merger with Arch Resources.

## SEC filing metadata
- accession: 0001193125-25-234041
- form_type: 8-K
- ticker: CNR
- cik: 0001710366
- company_name: Core Natural Resources, Inc.
- filed_at: 2025-10-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1710366/000119312525234041/0001193125-25-234041-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1710366/000119312525234041/d66172d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-234041
- JSON: https://secwatch.observer/filing/0001193125-25-234041.json
- Plain text: https://secwatch.observer/filing/0001193125-25-234041.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.