{"schema_version":"secwatch.filing_event.v1","accession":"0001558370-23-005369","form_type":"8-K","ticker":"MBIO","cik":"0001680048","company_name":"MUSTANG BIO, INC.","filed_at":"2023-04-03T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.009174+00:00","generated_at":"2026-06-17T07:04:44.943701+00:00","sec_items":["3.03","5.03","8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Mustang Bio effects 15-for-1 reverse stock split to regain Nasdaq compliance","bullets":["Reverse split effective April 3, 2023; shares trade split-adjusted April 4.","Outstanding shares reduced from ~109.4M to ~7.3M; no fractional shares issued.","Split approved by ~62.2% of voting power; Board set ratio on March 15.","Aimed at meeting Nasdaq $1.00 minimum bid price requirement for continued listing.","Bylaws amended to change quorum requirement to majority of outstanding voting power."],"urls":{"canonical":"https://secwatch.observer/filing/0001558370-23-005369","json":"https://secwatch.observer/filing/0001558370-23-005369.json","markdown":"https://secwatch.observer/filing/0001558370-23-005369.md","text":"https://secwatch.observer/filing/0001558370-23-005369.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023005369/0001558370-23-005369-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023005369/tmb-20230328x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T07:04:44.943701+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":"28bb043949e7194b7eebffc111320028ec0c66e4","claim":"MUSTANG BIO, INC.: Filed Certificate of Amendment to effect a 15-for-1 reverse stock split of common stock (effective 2023-04-03).","evidence_excerpt":"On April 3, 2023, Mustang Bio, Inc. (the “ Company ”) filed a Certificate of Amendment (the “ Amendment ”) to its Amended and Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware to effect a 15-for-1 reverse stock split (the “ Reverse Stock Split ”) of the Company’s shares of common stock, $0.0001 par value (the “ Common Stock ”).","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023005369/0001558370-23-005369-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2023-04-03"}],"fact_type":"governance_change"},{"claim_id":"44ea0334cd58467bb8e683dbc0af9b98f3538ab9","claim":"MUSTANG BIO, INC.: Amended bylaws to change the quorum requirement for stockholder meetings from a majority of outstanding shares to a majority of outstanding voting power (effective 2023-03-28).","evidence_excerpt":"on March 28, 2023, the Board adopted the Amended and Restated Bylaws of the Company (the “ Amended Bylaws ”), effective immediately. The Amended Bylaws modify the Company’s prior bylaws to amend Article II, Section 6 to change the quorum requirement for meetings of stockholders to a majority of the outstanding voting power of the Company, calculated in accordance with the Company’s Amended and Restated Certificate of Incorporation, from a majority of the outstanding shares of stock of the Company issued and outstanding and entitled to vote thereat.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1680048/000155837023005369/0001558370-23-005369-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2023-03-28"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}