{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-22-035014","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2022-03-17T23:59:59+00:00","discovered_at":"2026-05-14T18:04:07.786942+00:00","generated_at":"2026-06-26T22:02:33.700557+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Mustang Bio SVP of Finance & Corporate Controller resigns, consulting arrangement made","bullets":["Brian Achenbach resigns as SVP of Finance & Corporate Controller, effective March 27, 2022.","Resignation is voluntary; no disagreement with Company on operations, financial reporting, or controls.","Consulting arrangement with Achenbach begins March 28, 2022, to ensure transition."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-22-035014","json":"https://secwatch.observer/filing/0001104659-22-035014.json","markdown":"https://secwatch.observer/filing/0001104659-22-035014.md","text":"https://secwatch.observer/filing/0001104659-22-035014.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/0001104659-22-035014-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/tm229637d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-26T22:02:33.700557+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":"22f4ebfdde","claim":"Brian Achenbach resigned as Senior Vice President of Finance & Corporate Controller at MUSTANG BIO, INC..","evidence_excerpt":"On March 11, 2022, Mr. Brian Achenbach notified Mustang Bio, Inc. (the “Company”) that he was resigning from his role as the Company’s Senior Vice President of Finance & Corporate Controller, effective March 27, 2022, to pursue an opportunity outside of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/0001104659-22-035014-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Senior Vice President of Finance & Corporate Controller"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}