{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-151981","form_type":"8-K","ticker":"CNR","cik":"0001710366","company_name":"Core Natural Resources, Inc.","filed_at":"2025-06-30T23:59:59+00:00","discovered_at":"2026-05-14T18:02:49.426448+00:00","generated_at":"2026-05-18T13:25:03.101978+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Core Natural Resources updates Leer South restart; delay of up to 4 months, insurance recovery >$100M","bullets":["Mine re-entered June 10; ventilation restored, longwall components in good condition.","On June 26, elevated CO levels forced evacuation and resealing of affected area.","Plan aims to reposition and restart longwall within next four months (Q4 2025).","Reiterates 2025 coking coal sales volume guidance despite delayed restart.","Expects Leer South-related insurance recoveries in excess of $100 million."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-151981","json":"https://secwatch.observer/filing/0001193125-25-151981.json","markdown":"https://secwatch.observer/filing/0001193125-25-151981.md","text":"https://secwatch.observer/filing/0001193125-25-151981.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1710366/000119312525151981/0001193125-25-151981-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1710366/000119312525151981/d82152d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-18T13:25:03.101978+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}