{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-23-002041","form_type":"8-K","ticker":"CCCC","cik":"0001662579","company_name":"C4 Therapeutics, Inc.","filed_at":"2023-02-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:46.055196+00:00","generated_at":"2026-06-20T02:27:59.875476+00:00","sec_items":["5.02","7.01"],"event_type":"leadership","sentiment":"negative","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"C4 Therapeutics CMO Adam Crystal resigns; Hagop Youssoufian named interim CMO","bullets":["Adam S. Crystal, M.D., Ph.D., resigns as CMO effective Feb 24, 2023 to pursue a head of R&D opportunity elsewhere.","Crystal will provide transitional consulting services on an as-needed basis until Sep 1, 2023.","Hagop Youssoufian, M.D., appointed interim CMO effective Feb 24, 2023; permanent search underway."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-23-002041","json":"https://secwatch.observer/filing/0001628280-23-002041.json","markdown":"https://secwatch.observer/filing/0001628280-23-002041.md","text":"https://secwatch.observer/filing/0001628280-23-002041.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1662579/000162828023002041/0001628280-23-002041-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1662579/000162828023002041/cccc-20230130.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-20T02:27:59.875476+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":"739e7eca08","claim":"Adam S. Crystal resigned as Chief Medical Officer at C4 Therapeutics, Inc..","evidence_excerpt":"On January 30, 2023, Adam S. Crystal, M.D., Ph.D., informed us of his intent to resign from his position as the Chief Medical Officer of C4 Therapeutics, Inc.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1662579/000162828023002041/0001628280-23-002041-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Medical Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}