{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-112515","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2023-10-30T23:59:59+00:00","discovered_at":"2026-05-14T18:03:30.040637+00:00","generated_at":"2026-06-09T06:04:25.049866+00:00","sec_items":["1.01","3.02","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Mustang Bio raises ~$4.4M in registered direct offering with warrants","bullets":["Gross proceeds of ~$4.4M before fees; offering includes 2,588,236 shares (or equivalents) at $1.70 each.","Concurrent private placement of warrants to purchase 2,588,236 shares at $1.58, exercisable for 5.5 years.","Net proceeds to be used for working capital and general corporate purposes.","Placement agent H.C. Wainwright received 7.0% cash fee and 155,294 warrants exercisable at $2.125.","Offering closed on October 30, 2023."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-112515","json":"https://secwatch.observer/filing/0001104659-23-112515.json","markdown":"https://secwatch.observer/filing/0001104659-23-112515.md","text":"https://secwatch.observer/filing/0001104659-23-112515.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000110465923112515/0001104659-23-112515-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000110465923112515/tm2329367d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-09T06:04:25.049866+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":"add71d8ec1acb08784478bb2f31e5b9f6f3f1936","claim":"MUSTANG BIO, INC. entered into Securities Purchase Agreement with single institutional accredited investor valued at up to $4.4 million in gross proceeds (effective 2023-10-26).","evidence_excerpt":"On October 26, 2023, Mustang Bio, Inc. (the “ Company ”) entered into a Securities Purchase Agreement (the “ Purchase Agreement ”) with a single institutional accredited investor (the “ Investor ”) pursuant to which the Company agreed to issue and sell, in a registered direct offering priced at-the-market under the rules of The Nasdaq Stock Market (the “ Registered Offering ”), (i) 920,000 shares (the “ Shares ”) of common stock of the Company, $0.0001 par value per share (the “ Common Stock ”), at a price per Share of $1.70 and (ii) pre-funded warrants (the “ Pre-funded Warrants ”) to purchase up to 1,668,236 shares of Common Stock, at a price per Pre-funded Warrant equal to $1.699, the price per Share, less $0.001..","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000110465923112515/0001104659-23-112515-index.htm","confidence":0.97,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"equity purchase"},{"label":"Counterparty","value":"single institutional accredited investor"},{"label":"Value","value":"up to $4.4 million in gross proceeds"},{"label":"Effective","value":"2023-10-26"}],"fact_type":"material_agreement"},{"claim_id":"e43ea9d43a3e1c80fd33f46d60fd4c544a23a9b2","claim":"MUSTANG BIO, INC. entered into Engagement Letter with H.C. Wainwright & Co., LLC valued at Wainwright was paid a cash fee equal to 7.0% of the gross proceeds received by the Company in the Of (effective 2023-10-09).","evidence_excerpt":"H.C. Wainwright & Co., LLC (“ Wainwright ”) acted as the exclusive placement agent in connection with the Offerings under an Engagement Letter, dated as of October 9, 2023, between the Company and Wainwright (the “ Engagement Letter ”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000110465923112515/0001104659-23-112515-index.htm","confidence":0.95,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"underwriting"},{"label":"Counterparty","value":"H.C. Wainwright & Co., LLC"},{"label":"Value","value":"Wainwright was paid a cash fee equal to 7.0% of the gross proceeds received by the Company in the Of"},{"label":"Effective","value":"2023-10-09"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}