{"schema_version":"secwatch.filing_event.v1","accession":"0001558370-23-019708","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2023-12-11T23:59:59+00:00","discovered_at":"2026-05-14T18:03:30.041266+00:00","generated_at":"2026-06-07T14:56:51.520413+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Mustang Bio: MB-106 achieves 100% complete response in follicular lymphoma in Phase 1/2","bullets":["100% complete response rate in 5 follicular lymphoma patients; 100% overall response in follicular and Waldenstrom macroglobulinemia.","Favorable safety: no CRS > Grade 1, no ICANS; outpatient administration feasible.","Complete responses seen in patients previously treated with CD19-targeted CAR-T therapy.","Plan to finalize Phase 2 dose in early 2024; End-of-Phase 1 FDA meeting expected H1 2024.","Registrational trial planned for relapsed/refractory WM with 58 patients; top-line data expected mid-2026."],"urls":{"canonical":"https://secwatch.observer/filing/0001558370-23-019708","json":"https://secwatch.observer/filing/0001558370-23-019708.json","markdown":"https://secwatch.observer/filing/0001558370-23-019708.md","text":"https://secwatch.observer/filing/0001558370-23-019708.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023019708/0001558370-23-019708-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023019708/tmb-20231211x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T14:56:51.520413+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}