{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-24-056459","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2024-05-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:19.552230+00:00","generated_at":"2026-06-03T00:37:19.793261+00:00","sec_items":["1.01","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Mustang Bio closes $4M public offering of shares and warrants; amends existing warrants","bullets":["Gross proceeds of $4M from offering of shares and warrants at $0.237 per combined unit.","Net proceeds ~$3.3M; potential additional $12M if all series A-1, A-2, A-3 warrants cash-exercised.","Amended 2,588,236 existing warrants from $1.58 to $0.237 exercise price effective May 2.","Offering includes 16.9M shares and three series of warrants each for 16.9M shares.","H.C. Wainwright acted as placement agent; proceeds for working capital."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-24-056459","json":"https://secwatch.observer/filing/0001104659-24-056459.json","markdown":"https://secwatch.observer/filing/0001104659-24-056459.md","text":"https://secwatch.observer/filing/0001104659-24-056459.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000110465924056459/0001104659-24-056459-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000110465924056459/tm2413360d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T00:37:19.793261+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":"5ff2b35db2e010862cbc5d45fd155a60d79509db","claim":"MUSTANG BIO, INC. amended Warrant Amendment Agreement with the Investor (effective 2024-04-29).","evidence_excerpt":"onnection with the Offering, the Company also entered into a warrant amendment agreement (the “Warrant Amendment Agreement”) with the Investor.","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000110465924056459/0001104659-24-056459-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"amendment"},{"label":"Counterparty","value":"the Investor"},{"label":"Effective","value":"2024-04-29"}],"fact_type":"material_agreement"},{"claim_id":"6211263af4b2a570a0cae3f2d3b28d4dcd6d83ec","claim":"MUSTANG BIO, INC. entered into Purchase Agreement with a certain institutional investor (effective 2024-04-29).","evidence_excerpt":"the Company entered into a securities purchase agreement (the “Purchase Agreement”) with a certain institutional investor (the “Investor”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000110465924056459/0001104659-24-056459-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"equity purchase"},{"label":"Counterparty","value":"a certain institutional investor"},{"label":"Effective","value":"2024-04-29"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}