{"schema_version":"secwatch.filing_event.v1","accession":"0001558370-23-006343","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2023-04-20T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.009651+00:00","generated_at":"2026-06-16T22:35:35.478589+00:00","sec_items":["8.01","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Mustang Bio amends ATM equity program; up to $100M authorized, ~$8M remaining","bullets":["Amendment No. 3 to At Market Issuance Sales Agreement dated April 14, 2023.","Total ATM offering capacity remains $100M; ~$92M already sold, ~$8M available.","Adds Instruction I.B.6 limitations based on non-affiliate market cap; removes Oppenheimer & Co. as agent.","No securities sold under Instruction I.B.6 in prior 12 months; program continues under existing registration."],"urls":{"canonical":"https://secwatch.observer/filing/0001558370-23-006343","json":"https://secwatch.observer/filing/0001558370-23-006343.json","markdown":"https://secwatch.observer/filing/0001558370-23-006343.md","text":"https://secwatch.observer/filing/0001558370-23-006343.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023006343/0001558370-23-006343-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023006343/tmb-20230414x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T22:35:35.478589+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"}