{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-067919","form_type":"8-K","ticker":"ACLX","cik":"0001786205","company_name":"Arcellx, Inc.","filed_at":"2024-03-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:25.529252+00:00","generated_at":"2026-06-04T21:26:26.683200+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Arcellx dismisses EY, appoints PwC as independent auditor for FY 2024","bullets":["Board dismissed Ernst & Young as independent auditor on March 8, 2024; no disagreements on accounting principles.","PricewaterhouseCoopers appointed as successor auditor for FY 2024; engagement letter signed March 13, 2024.","Only reportable event was a prior material weakness in R&D expense controls, remediated as of Dec 31, 2022.","EY agreed with disclosures; letter filed as Exhibit 16.1."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-067919","json":"https://secwatch.observer/filing/0001193125-24-067919.json","markdown":"https://secwatch.observer/filing/0001193125-24-067919.md","text":"https://secwatch.observer/filing/0001193125-24-067919.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1786205/000119312524067919/0001193125-24-067919-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1786205/000119312524067919/d785063d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T21:26:26.683200+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":"6fc1c5c5ef3e2adcee83c17c208af7a7eb95e114","claim":"Arcellx, Inc. dismissed Ernst & Young LLP as its auditor.","evidence_excerpt":"On March 8, 2024, the Board of Directors (the “Board”) of Arcellx, Inc. (the “Company”), upon the recommendation of the Audit Committee of the Board (the “Audit Committee”), approved the dismissal of Ernst & Young LLP (“EY”) as the Company’s independent registered public accounting firm.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1786205/000119312524067919/0001193125-24-067919-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"dismissal"},{"label":"Auditor","value":"Ernst & Young LLP"}],"fact_type":"auditor_change"},{"claim_id":"e10da9048c023a5ef5f197e1b862414ba27e6079","claim":"Arcellx, Inc. engaged PricewaterhouseCoopers LLP as its auditor.","evidence_excerpt":"On March 8, 2024, the Board, upon the recommendation of the Audit Committee, approved the engagement of PwC as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2024, subject to PwC’s customary client acceptance procedures and the execution of an engagement letter.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1786205/000119312524067919/0001193125-24-067919-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"PricewaterhouseCoopers LLP"}],"fact_type":"auditor_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}