{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-142735","form_type":"8-K","ticker":"RVMD","cik":"0001628171","company_name":"Revolution Medicines, Inc.","filed_at":"2025-06-18T23:59:59+00:00","discovered_at":"2026-05-14T18:02:49.119192+00:00","generated_at":"2026-05-19T03:02:28.542956+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Revolution Medicines director Barbara Weber resigns ahead of 2025 annual meeting due to Tango collaboration activation","bullets":["Barbara Weber, M.D., resigned from Revolution Medicines board effective immediately prior to June 26, 2025 annual meeting.","Resignation triggered by activation of clinical study under collaboration with Tango Therapeutics, not due to any disagreement.","Dr. Weber also stepped down from Nominating and Corporate Governance Committee and R&D Committee.","The company has not yet named a replacement for the board vacancy."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-142735","json":"https://secwatch.observer/filing/0001193125-25-142735.json","markdown":"https://secwatch.observer/filing/0001193125-25-142735.md","text":"https://secwatch.observer/filing/0001193125-25-142735.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/0001193125-25-142735-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/d935264d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T03:02:28.542956+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":"83ef8076eb","claim":"Barbara Weber, M.D. resigned as Director at Revolution Medicines, Inc..","evidence_excerpt":"On June 18, 2025, Barbara Weber, M.D., communicated her decision to resign from the board of directors (the “Board”) of Revolution Medicines, Inc.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/0001193125-25-142735-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}