{"schema_version":"secwatch.filing_event.v1","accession":"0001493152-26-044451","form_type":"8-K","ticker":"MTNB","cik":"0001582554","company_name":"Matinas BioPharma Holdings, Inc.","filed_at":"2026-09-28T12:00:26+00:00","discovered_at":"2026-09-28T12:05:01.553571+00:00","generated_at":"2026-10-12T13:30:31.063828+00:00","sec_items":["3.03","5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Matinas BioPharma effects 1-for-15 reverse stock split on Sept 28, 2026; CUSIP changes to 576810 402","bullets":["Certificate of Amendment filed with Delaware on Sept 25, 2026; split effective 12:01 a.m. ET Sept 28, 2026, with NYSE American trading on a split-adjusted basis at the open.","Every 15 shares of $0.0001 par value common stock converted into 1 share; no fractional shares issued, with holders receiving a proportional cash payment instead.","Par value and authorized share count unchanged; outstanding options, warrants and convertible preferred stock were proportionally adjusted.","Stockholders approved the amendment at the June 23, 2025 annual meeting; the Board authorized the filing on Sept 16, 2026."],"urls":{"canonical":"https://secwatch.observer/filing/0001493152-26-044451","json":"https://secwatch.observer/filing/0001493152-26-044451.json","markdown":"https://secwatch.observer/filing/0001493152-26-044451.md","text":"https://secwatch.observer/filing/0001493152-26-044451.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1582554/000149315226044451/0001493152-26-044451-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1582554/000149315226044451/form8-k.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T13:30:31.063828+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"}