---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-356186"
form_type: "8-K"
ticker: "CNR"
cik: "0001710366"
company_name: "Core Natural Resources, Inc."
filed_at: "2026-08-19T12:04:57+00:00"
generated_at: "2026-08-19T12:11:08.054147+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Core Natural Resources names Nathan Tucker CFO; Thakkar expands to operations role

## Summary
- Nathan Tucker appointed SVP and CFO effective Aug 18, 2026, succeeding Mitesh Thakkar.
- Thakkar remains President, now overseeing operations, marketing, logistics, and long-term strategy.
- Tucker's new package: $400,000 base salary, 65% target STI, 125% LTI opportunity.
- Tucker previously VP of finance since Core's Jan 2025 formation; joined CONSOL in 2010.
- Succession described as long-planned; chairman Jimmy Brock praised both executives.

## SEC filing metadata
- accession: 0001193125-26-356186
- form_type: 8-K
- ticker: CNR
- cik: 0001710366
- company_name: Core Natural Resources, Inc.
- filed_at: 2026-08-19T12:04:57+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/0001193125-26-356186-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/d113945d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-356186
- JSON: https://secwatch.observer/filing/0001193125-26-356186.json
- Plain text: https://secwatch.observer/filing/0001193125-26-356186.txt

## Key facts
- Executive change
  Nathan Tucker was appointed as Senior Vice President and Chief Financial Officer at Core Natural Resources, Inc..
  - Action: appointed
  - Role: Senior Vice President and Chief Financial Officer
  source text: the Board of Directors (the “Board”) of Core Natural Resources, Inc. (the “Company”) appointed Nathan Tucker to serve as the Company’s Senior Vice President and Chief Financial Officer, effective immediately, taking over the Chief Financial Officer role from Mitesh Thakkar
  evidence_url: https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/0001193125-26-356186-index.htm
- Executive change
  Mitesh Thakkar changed role as President at Core Natural Resources, Inc..
  - Action: expanded
  - Role: President
  source text: who will continue to serve as President of the Company and is assuming an expanded role with day-to-day responsibility for the Company’s primary operating functions, including operations, marketing, logistics, and long-term strategy.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/0001193125-26-356186-index.htm

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