{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-015323","form_type":"8-K","ticker":"STRO","cik":"0001382101","company_name":"SUTRO BIOPHARMA, INC.","filed_at":"2023-04-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:38.651555+00:00","generated_at":"2026-06-16T08:40:25.982467+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Sutro Biopharma CSO Dr. Trevor Hallam resigns, effective May 31, 2023","bullets":["Dr. Trevor Hallam resigns as President of Research and Chief Scientific Officer effective May 31, 2023.","Resignation is not due to any disagreement with management or the board.","No successor has been announced."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-015323","json":"https://secwatch.observer/filing/0000950170-23-015323.json","markdown":"https://secwatch.observer/filing/0000950170-23-015323.md","text":"https://secwatch.observer/filing/0000950170-23-015323.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1382101/000095017023015323/0000950170-23-015323-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1382101/000095017023015323/stro-20230424.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T08:40:25.982467+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":"0f0f1e05a6","claim":"Trevor Hallam resigned as President of Research and Chief Scientific Officer at SUTRO BIOPHARMA, INC..","evidence_excerpt":"On April 24, 2023, Dr. Trevor Hallam notified Sutro Biopharma, Inc. (the “ Company ”) that he will resign from his role as President of Research and Chief Scientific Officer of the Company, effective May 31, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1382101/000095017023015323/0000950170-23-015323-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"President of Research and Chief Scientific Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}