{"schema_version":"secwatch.filing_event.v1","accession":"0001641172-25-003271","form_type":"8-K","ticker":"MTNB","cik":"0001582554","company_name":"Matinas BioPharma Holdings, Inc.","filed_at":"2025-04-08T23:59:59+00:00","discovered_at":"2026-05-14T18:02:48.875624+00:00","generated_at":"2026-05-23T19:02:10.377602+00:00","sec_items":["3.02","8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Matinas BioPharma closes $1.65M second tranche of Series C preferred & warrant offering","bullets":["Second closing on April 8, 2025 raised $1.65M from sale of 1,650 Series C Convertible Preferred shares.","Total offering raises $3.3M; preferred initially convertible into up to 5.63M common shares, warrants for 11.26M additional shares.","Securities issued without registration under Section 4(a)(2) and Regulation D; proceeds for general corporate purposes.","First closing of 1,650 shares occurred on February 13, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001641172-25-003271","json":"https://secwatch.observer/filing/0001641172-25-003271.json","markdown":"https://secwatch.observer/filing/0001641172-25-003271.md","text":"https://secwatch.observer/filing/0001641172-25-003271.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1582554/000164117225003271/0001641172-25-003271-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1582554/000164117225003271/form8-k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T19:02:10.377602+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"}