{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-22-157549","form_type":"8-K","ticker":"ACLX","cik":"0001786205","company_name":"Arcellx, Inc.","filed_at":"2022-05-23T23:59:59+00:00","discovered_at":"2026-05-14T18:04:02.312418+00:00","generated_at":"2026-06-25T08:18:46.081015+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Arcellx appoints Michelle Gilson as CFO effective May 23, replacing interim CFO","bullets":["Michelle Gilson named CFO, principal financial and accounting officer, effective May 23, 2022.","Prior role: Managing Director and Senior Equity Research Analyst at Canaccord Genuity covering biotech.","Annual base salary of $420,000; eligible for annual bonus up to 40% of base salary.","Granted option to purchase 103,515 shares (4-year vest) and 67,285 RSUs (3-year vest).","Severance agreement provides 18-month salary and bonus upon qualifying change-in-control termination."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-22-157549","json":"https://secwatch.observer/filing/0001193125-22-157549.json","markdown":"https://secwatch.observer/filing/0001193125-22-157549.md","text":"https://secwatch.observer/filing/0001193125-22-157549.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1786205/000119312522157549/0001193125-22-157549-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1786205/000119312522157549/d334887d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-25T08:18:46.081015+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":"8d69816a08","claim":"Lance Thibault departed as interim Chief Financial Officer at Arcellx, Inc..","evidence_excerpt":"On the Effective Date, Lance Thibault, who has served as the Company’s interim Chief Financial Officer since January 2022, will cease to be the interim Chief Financial Officer of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1786205/000119312522157549/0001193125-22-157549-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"ceased to be interim Chief Financial Officer"},{"label":"Role","value":"interim Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"fad2926a06","claim":"Michelle Gilson was appointed as Chief Financial Officer at Arcellx, Inc..","evidence_excerpt":"On May 20, 2022, Arcellx, Inc. (the “ Company ”) appointed Michelle Gilson as its Chief Financial Officer, effective May 23, 2022","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1786205/000119312522157549/0001193125-22-157549-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}