{"filing":{"accession_number":"0001710366-26-000053","cik":"0001710366","ticker":"CNR","company_name":"Core Natural Resources, Inc.","form":"8-K","filing_date":"2026-08-06","report_date":"2026-08-06","primary_document":"cnr-20260806.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1710366/000171036626000053/cnr-20260806.htm"},"events":[{"id":25954,"run_id":23568,"accession_number":"0001710366-26-000053","anchor_item_number":"2.02","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.97,"summary":"Core Natural Resources issued a press release on August 6, 2026 announcing its second quarter 2026 financial results, disclosing net income of $126.5 million ($2.51 per diluted share), adjusted EBITDA of $323.6 million, and free cash flow of $148 million, along with comprehensive operational metrics, segment performance, and forward guidance.","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-06","form":"8-K","submitted_at":null,"items":[{"id":26904,"accession_number":"0001710366-26-000053","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Core Natural Resources issued a press release on August 6, 2026 announcing its second quarter 2026 financial results, disclosing net income of $126.5 million, adjusted EBITDA of $323.6 million, and free cash flow of $148 million. The filing explicitly states this is Item 2.02 (Results of Operations and Financial Condition) with the press release attached as Exhibit 99.1, which is the standard format for earnings releases. The disclosure includes detailed operational metrics, segment performance, and forward guidance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-09T02:49:46.119035+00:00","company_name":"","ticker":null,"filing_date":""},{"id":26905,"accession_number":"0001710366-26-000053","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure incorporates by reference Item 2.02 and furnishes an investor presentation. The exhibits include a detailed earnings release dated August 6, 2026, reporting Core Natural Resources' second quarter 2026 financial results: net income of $126.5 million ($2.51 per diluted share), adjusted EBITDA of $323.6 million, operating cash flow of $250.4 million, and free cash flow of $148 million. The release includes comprehensive operational metrics, segment performance, guidance, and capital return updates—all hallmarks of a quarterly earnings disclosure material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-09T02:49:46.119035+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":26904,"accession_number":"0001710366-26-000053","item_number":"2.02","item_title":"Results of Operations and Financial Condition.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.98,"reasoning":"Core Natural Resources issued a press release on August 6, 2026 announcing its second quarter 2026 financial results, disclosing net income of $126.5 million, adjusted EBITDA of $323.6 million, and free cash flow of $148 million. The filing explicitly states this is Item 2.02 (Results of Operations and Financial Condition) with the press release attached as Exhibit 99.1, which is the standard format for earnings releases. The disclosure includes detailed operational metrics, segment performance, and forward guidance.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-09T02:49:46.119035+00:00","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-06"},{"id":26905,"accession_number":"0001710366-26-000053","item_number":"7.01","item_title":"Regulation FD Disclosure.","event_type":"earnings_release","event_domain":"financial","is_material":true,"confidence":0.95,"reasoning":"The Item 7.01 disclosure incorporates by reference Item 2.02 and furnishes an investor presentation. The exhibits include a detailed earnings release dated August 6, 2026, reporting Core Natural Resources' second quarter 2026 financial results: net income of $126.5 million ($2.51 per diluted share), adjusted EBITDA of $323.6 million, operating cash flow of $250.4 million, and free cash flow of $148 million. The release includes comprehensive operational metrics, segment performance, guidance, and capital return updates—all hallmarks of a quarterly earnings disclosure material to investors.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-09T02:49:46.119035+00:00","company_name":"Core Natural Resources, Inc.","ticker":"CNR","filing_date":"2026-08-06"}]}