{"schema_version":"secwatch.filing_event.v1","accession":"0001213900-26-062152","form_type":"8-K","ticker":"ZONE","cik":"0001956741","company_name":"CleanCore Solutions, Inc.","filed_at":"2026-05-28T20:30:16+00:00","discovered_at":"2026-05-28T20:31:00.560524+00:00","generated_at":"2026-05-28T20:33:35.854733+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"CleanCore director David Enholm resigns; CEO Tyler Hassen appointed to board","bullets":["David Enholm resigned from board effective May 21, 2026; no disagreement with company; remains CFO.","CEO Tyler Hassen appointed to fill board vacancy, effective May 21, 2026.","Hassen, 43, has been CEO since March 2026; prior roles at Basin Holdings and U.S. Dept. of Interior."],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-26-062152","json":"https://secwatch.observer/filing/0001213900-26-062152.json","markdown":"https://secwatch.observer/filing/0001213900-26-062152.md","text":"https://secwatch.observer/filing/0001213900-26-062152.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1956741/000121390026062152/0001213900-26-062152-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1956741/000121390026062152/ea0292418-8k_cleancore.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-28T20:33:35.854733+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":"4ecf997852","claim":"David Enholm resigned as member of the Board at CleanCore Solutions, Inc..","evidence_excerpt":"On May 21, 2026, David Enholm notified the Board of Directors (the “Board”) of CleanCore Solutions, Inc. (the “Company”) of his resignation as a member of the Board, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1956741/000121390026062152/0001213900-26-062152-index.htm","confidence":0.95},{"claim_id":"94a1b72efd","claim":"Tyler Hassen was appointed as director at CleanCore Solutions, Inc..","evidence_excerpt":"On May 21, 2026, the Board, upon the recommendation of the Nominating and Corporate Governance Committee of the Board (the “Nominating Committee”), appointed Tyler Hassen, the Company’s Chief Executive Officer, to fill the vacancy on the Board created by Mr. Enholm’s resignation, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1956741/000121390026062152/0001213900-26-062152-index.htm","confidence":0.95}],"comparable_filings":[{"accession":"0001213900-26-063573","ticker":"MZYX","company_name":"MOZAYYX Acquisition Corp.","filed_at":"2026-06-01T21:00:14+00:00","headline":"MOZAYYX Acquisition appoints Emma Rose Bienvenu as independent director","event_type":"leadership","sec_items":["5.02"],"materiality_score":0.3,"calibrated_materiality_score":0.3,"match_reasons":["same fact type: executive_change","same SEC item: 5.02","same event type: leadership","similar materiality"],"urls":{"canonical":"https://secwatch.observer/filing/0001213900-26-063573","json":"https://secwatch.observer/filing/0001213900-26-063573.json","markdown":"https://secwatch.observer/filing/0001213900-26-063573.md","edgar_index":"https://www.sec.gov/Archives/edgar/data/2097376/000121390026063573/0001213900-26-063573-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2097376/000121390026063573/ea0292919-8k_moxayyx.htm"},"side_by_side_evidence":{"fact_type":"executive_change","source_excerpt":"On May 21, 2026, David Enholm notified the Board of Directors (the “Board”) of CleanCore Solutions, Inc. 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(the “Company”) of his resignation as a member of the Board, effective immediately.","source_evidence_url":"https://www.sec.gov/Archives/edgar/data/1956741/000121390026062152/0001213900-26-062152-index.htm","comparable_excerpt":"appointed Mitch Little, former Senior Vice President, Worldwide Client Engagement of Microchip, as a member of the Board, effective June 1, 2026.","comparable_evidence_url":"https://www.sec.gov/Archives/edgar/data/827054/000082705426000020/0000827054-26-000020-index.htm"}},{"accession":"0001680247-26-000091","ticker":"PUMP","company_name":"ProPetro Holding Corp.","filed_at":"2026-06-01T20:16:36+00:00","headline":"Director Alex Volkov resigns from ProPetro board after Pioneer (Exxon) sells all shares","event_type":"leadership","sec_items":["5.02"],"materiality_score":0.3,"calibrated_materiality_score":0.3,"match_reasons":["same fact type: executive_change","same SEC item: 5.02","same event type: leadership","similar materiality"],"urls":{"canonical":"https://secwatch.observer/filing/0001680247-26-000091","json":"https://secwatch.observer/filing/0001680247-26-000091.json","markdown":"https://secwatch.observer/filing/0001680247-26-000091.md","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680247/000168024726000091/0001680247-26-000091-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680247/000168024726000091/pump-20260528.htm"},"side_by_side_evidence":{"fact_type":"executive_change","source_excerpt":"On May 21, 2026, David Enholm notified the Board of Directors (the “Board”) of CleanCore Solutions, Inc. 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