secwatch.observer — SEC 8-K summary
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Issuer:     Core Natural Resources, Inc. (CNR)
CIK:        0001710366
Form:       8-K
Filed at:   2026-08-19T12:04:57+00:00
Accession:  0001193125-26-356186
Event type: leadership
Sentiment:  neutral
Materiality: 0.55
Item codes: 5.02, 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

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

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/0001193125-26-356186-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/d113945d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-26-356186

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer