{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-25-003782","form_type":"8-K","ticker":null,"cik":"0001037676","company_name":"ARCH RESOURCES, INC.","filed_at":"2025-01-15T23:59:59+00:00","discovered_at":"2026-05-14T18:03:02.763212+00:00","generated_at":"2026-05-28T00:47:07.261758+00:00","sec_items":["1.01","1.02","2.01","3.01","3.03","5.01","5.02","5.03","7.01","8.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":1.0,"calibrated_materiality_score":1.0,"confidence":"high","headline":"Arch Resources merger with CONSOL completed; Core Natural Resources begins trading Jan 15 under CNR","bullets":["Arch stockholders received 1.326 Core shares per share; Core to trade NYSE under CNR starting Jan 15.","Core upsized RCF to $600M from $355M, extended maturity to April 2029, and reduced interest rate by 75 bps.","Estimated annual synergies of $110M-$140M from the merger of equals.","Board of eight: four former CONSOL directors, four former Arch directors; Jimmy Brock exec chair, Paul Lang CEO.","More than 99% stockholder approval at both companies' meetings."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-25-003782","json":"https://secwatch.observer/filing/0001104659-25-003782.json","markdown":"https://secwatch.observer/filing/0001104659-25-003782.md","text":"https://secwatch.observer/filing/0001104659-25-003782.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/tm252363d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-28T00:47:07.261758+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":[{"claim_id":"1f29a08d21","claim":"Rosemary L. Klein was appointed as Director at ARCH RESOURCES, INC..","evidence_excerpt":"Messrs. Miteshkumar B. Thakkar and George J. Schuller Jr. and Ms. Rosemary L. Klein, who were members of the board of directors of Merger Sub immediately prior to the Effective Time, became members of Arch’s board of directors.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"420212fcfc","claim":"Rosemary L. Klein was appointed as Vice President and Corporate Secretary at ARCH RESOURCES, INC..","evidence_excerpt":"each of the officers of Merger Sub immediately prior to the Effective Time became the officers of Arch, including the following individuals: Miteshkumar B. Thakkar President and Treasurer George J. Schuller Jr. Vice President Rosemary L. Klein Vice President and Corporate Secretary","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Vice President and Corporate Secretary"}],"fact_type":"executive_change"},{"claim_id":"5033a8aff5","claim":"Miteshkumar B. Thakkar was appointed as Director at ARCH RESOURCES, INC..","evidence_excerpt":"Messrs. Miteshkumar B. Thakkar and George J. Schuller Jr. and Ms. Rosemary L. Klein, who were members of the board of directors of Merger Sub immediately prior to the Effective Time, became members of Arch’s board of directors.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"57f929bc15","claim":"Miteshkumar B. Thakkar was appointed as President and Treasurer at ARCH RESOURCES, INC..","evidence_excerpt":"each of the officers of Merger Sub immediately prior to the Effective Time became the officers of Arch, including the following individuals: Miteshkumar B. Thakkar President and Treasurer George J. Schuller Jr. Vice President Rosemary L. Klein Vice President and Corporate Secretary","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President and Treasurer"}],"fact_type":"executive_change"},{"claim_id":"9b43f123e0","claim":"George J. Schuller Jr. was appointed as Director at ARCH RESOURCES, INC..","evidence_excerpt":"Messrs. Miteshkumar B. Thakkar and George J. Schuller Jr. and Ms. Rosemary L. Klein, who were members of the board of directors of Merger Sub immediately prior to the Effective Time, became members of Arch’s board of directors.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"facd01de08","claim":"George J. Schuller Jr. was appointed as Vice President at ARCH RESOURCES, INC..","evidence_excerpt":"each of the officers of Merger Sub immediately prior to the Effective Time became the officers of Arch, including the following individuals: Miteshkumar B. Thakkar President and Treasurer George J. Schuller Jr. Vice President Rosemary L. Klein Vice President and Corporate Secretary","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Vice President"}],"fact_type":"executive_change"},{"claim_id":"2385879598299c98031e7b0a565ef1464fba35d9","claim":"ARCH RESOURCES, INC.: Amended and restated certificate of incorporation in connection with merger at Effective Time.","evidence_excerpt":"At the Effective Time, Arch’s Restated Certificate of Incorporation was amended and restated in accordance with the Merger Agreement","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"}],"fact_type":"governance_change"},{"claim_id":"d889b2c51cef594e1036fc1f3153b20f3845b7cf","claim":"ARCH RESOURCES, INC.: Bylaws of Merger Sub became bylaws of Arch, subject to exceptions in Merger Agreement.","evidence_excerpt":"the bylaws of Merger Sub in effect immediately prior to the Effective Time became the bylaws of Arch (subject to certain exceptions as set forth in the Merger Agreement)","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"}],"fact_type":"governance_change"},{"claim_id":"c1f97e546796c389b9d2bfa7d8b3f0dace16a76a","claim":"ARCH RESOURCES, INC. underwent a change of control involving CONSOL Energy Inc. (closed 2025-01-14).","evidence_excerpt":"On January 14, 2025 (the \"Closing Date\"), Arch Resources, Inc., a Delaware corporation (\"Arch\" or the \"Company\"), completed its previously announced merger of equals transaction with CONSOL Energy Inc., a Delaware corporation (\"CONSOL\"), pursuant to the terms of that certain Agreement and Plan of Merger, dated as of August 20, 2024 (the \"Merger Agreement\"), by and among the Company, CONSOL and Mountain Range Merger Sub Inc., a Delaware corporation and wholly owned subsidiary of CONSOL (\"Merger Sub\"). Pursuant to the terms of the Merger Agreement, Merger Sub merged with and into Arch (the \"Merger\"), with Arch continuing as the surviving corporation and as a wholly owned subsidiary of CONSOL.","evidence_source":"SEC 8-K Item 2.01/5.01","evidence_url":"https://www.sec.gov/Archives/edgar/data/1037676/000110465925003782/0001104659-25-003782-index.htm","confidence":0.98,"family_label":"M&A Transactions","details":[{"label":"Action","value":"change of control"},{"label":"Counterparty","value":"CONSOL Energy Inc."},{"label":"Closing","value":"2025-01-14"}],"fact_type":"ma_transaction"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}