{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-018163","form_type":"8-K","ticker":"VTGN","cik":"0001411685","company_name":"Vistagen Therapeutics, Inc.","filed_at":"2026-03-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.021173+00:00","generated_at":"2026-05-15T11:30:22.690351+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"low","headline":"Vistagen files new corporate presentation; no material updates disclosed","bullets":["Filed 8-K to announce use of updated corporate presentation dated March 2026.","Presentation covers pipeline and strategy but no specific financial or clinical data provided.","No earnings, guidance, or operational milestones were released in this filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-018163","json":"https://secwatch.observer/filing/0001628280-26-018163.json","markdown":"https://secwatch.observer/filing/0001628280-26-018163.md","text":"https://secwatch.observer/filing/0001628280-26-018163.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1411685/000162828026018163/0001628280-26-018163-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1411685/000162828026018163/vtgn-20260316.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T11:30:22.690351+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"}