{"schema_version":"secwatch.filing_event.v1","accession":"0001999480-26-000016","form_type":"8-K","ticker":"ANRO","cik":"0001999480","company_name":"Alto Neuroscience, Inc.","filed_at":"2026-05-28T12:18:14+00:00","discovered_at":"2026-05-28T12:20:00.305607+00:00","generated_at":"2026-05-28T12:20:17.492172+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Alto Neuroscience appoints Andrew Miller to board; former Karuna Therapeutics president","bullets":["Andrew Miller, Ph.D., appointed to board effective May 27, 2026, filling vacancy after board size increased to seven.","Miller founded Karuna Therapeutics and served as President of R&D until its acquisition by Bristol Myers Squibb in March 2024.","Appointed to the Nominating and Corporate Governance Committee, replacing Christopher Nixon Cox.","Initial option grant for up to 48,200 shares (Black-Scholes value ≤$400k); annual retainer $40k plus $5k for NCGC service.","Board determined Miller is independent under NYSE and SEC rules."],"urls":{"canonical":"https://secwatch.observer/filing/0001999480-26-000016","json":"https://secwatch.observer/filing/0001999480-26-000016.json","markdown":"https://secwatch.observer/filing/0001999480-26-000016.md","text":"https://secwatch.observer/filing/0001999480-26-000016.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1999480/000199948026000016/0001999480-26-000016-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1999480/000199948026000016/alto-20260527.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-28T12:20:17.492172+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":"c5d0d5e62f","claim":"Andrew Miller was appointed as Director at Alto Neuroscience, Inc..","evidence_excerpt":"the Board of Directors (the “Board”) of Alto Neuroscience, Inc. 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