{"schema_version":"secwatch.filing_event.v1","accession":"0001564590-21-059679","form_type":"8-K","ticker":"LENZ","cik":"0001815776","company_name":"LENZ Therapeutics, Inc.","filed_at":"2021-12-08T23:59:59+00:00","discovered_at":"2026-05-14T18:04:14.281622+00:00","generated_at":"2026-06-28T02:53:04.928169+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"negative","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Graphite Bio COO Katherine Stultz to depart effective Dec 31, 2021","bullets":["Katherine V. Stultz, Chief Operating Officer, agreed to end employment on December 31, 2021.","Departure decision announced on December 6, 2021; no replacement named.","No severance or compensatory details disclosed in the filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001564590-21-059679","json":"https://secwatch.observer/filing/0001564590-21-059679.json","markdown":"https://secwatch.observer/filing/0001564590-21-059679.md","text":"https://secwatch.observer/filing/0001564590-21-059679.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1815776/000156459021059679/0001564590-21-059679-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1815776/000156459021059679/grph-8k_20211206.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T02:53:04.928169+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":"f0cd936965","claim":"Katherine V. Stultz departed as Chief Operating Officer at LENZ Therapeutics, Inc..","evidence_excerpt":"On December 6, 2021, Graphite Bio, Inc. (the “Company”) and Katherine V. Stultz, the Company’s Chief Operating Officer, agreed that Ms. Stultz’s employment with the Company will end effective as of the close of business on December 31, 2021.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1815776/000156459021059679/0001564590-21-059679-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"agreed that employment will end"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}