{"filing":{"accession_number":"0001193125-26-356186","cik":"0001710366","ticker":"CNR","company_name":"Core Natural Resources, Inc.","form":"8-K","filing_date":"2026-08-19","report_date":"2026-08-18","primary_document":"d113945d8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1710366/000119312526356186/d113945d8k.htm"},"events":[{"id":28404,"run_id":25980,"accession_number":"0001193125-26-356186","anchor_item_number":"5.02","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.94,"summary":"Nathan Tucker was appointed as Senior Vice President and Chief Financial Officer of Core Natural Resources, Inc. effective August 18, 2026, succeeding Mitesh Thakkar who expanded into an additional role. This C-suite appointment is material to investor assessment of company leadership and governance.","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-19","form":"8-K","submitted_at":null,"items":[{"id":30341,"accession_number":"0001193125-26-356186","item_number":"5.02","item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"Nathan Tucker was appointed as Senior Vice President and Chief Financial Officer effective immediately on August 18, 2026, taking over the CFO role from Mitesh Thakkar. While the filing also discloses Tucker's new compensation package and Thakkar's expanded role, the principal disclosed action is the appointment of Tucker to the CFO position. This is a material executive appointment at a major public company (NYSE: CNR) that would affect investor assessment of leadership and governance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-19T12:06:48.940354+00:00","company_name":"","ticker":null,"filing_date":""},{"id":30342,"accession_number":"0001193125-26-356186","item_number":"7.01","item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"The filing announces the election of Nathan Tucker as Senior Vice President and Chief Financial Officer of Core Natural Resources, effective immediately. While the press release also describes Mitesh Thakkar's expanded role, the principal disclosed action under Item 7.01 is Tucker's appointment to the CFO position. Executive appointments to C-suite roles are material events affecting investor assessment of company leadership and governance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-19T12:06:48.940354+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":30341,"accession_number":"0001193125-26-356186","item_number":"5.02","item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"Nathan Tucker was appointed as Senior Vice President and Chief Financial Officer effective immediately on August 18, 2026, taking over the CFO role from Mitesh Thakkar. While the filing also discloses Tucker's new compensation package and Thakkar's expanded role, the principal disclosed action is the appointment of Tucker to the CFO position. This is a material executive appointment at a major public company (NYSE: CNR) that would affect investor assessment of leadership and governance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-19T12:06:48.940354+00:00","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-19"},{"id":30342,"accession_number":"0001193125-26-356186","item_number":"7.01","item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"The filing announces the election of Nathan Tucker as Senior Vice President and Chief Financial Officer of Core Natural Resources, effective immediately. While the press release also describes Mitesh Thakkar's expanded role, the principal disclosed action under Item 7.01 is Tucker's appointment to the CFO position. Executive appointments to C-suite roles are material events affecting investor assessment of company leadership and governance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-19T12:06:48.940354+00:00","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-19"}]}