{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-277887","form_type":"8-K","ticker":null,"cik":"0001845337","company_name":"Day One Biopharmaceuticals, Inc.","filed_at":"2023-11-15T23:59:59+00:00","discovered_at":"2026-05-14T18:03:30.999788+00:00","generated_at":"2026-06-08T02:45:15.192860+00:00","sec_items":["4.01","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Day One Biopharma dismisses EY as auditor, appoints PwC effective Nov 10, 2023","bullets":["Audit Committee dismissed EY on Nov 10, 2023; no disagreements or reportable events in prior periods.","PwC appointed as independent registered public accounting firm for fiscal year ending Dec 31, 2023.","EY's reports for FY2021 and FY2022 were unqualified and contained no adverse opinions.","Neither the company nor anyone on its behalf consulted PwC on accounting matters before engagement."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-277887","json":"https://secwatch.observer/filing/0001193125-23-277887.json","markdown":"https://secwatch.observer/filing/0001193125-23-277887.md","text":"https://secwatch.observer/filing/0001193125-23-277887.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1845337/000119312523277887/0001193125-23-277887-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1845337/000119312523277887/d361807d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-08T02:45:15.192860+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":"c07702ae79ffc4557bee2e3e7b52e65682fab883","claim":"Day One Biopharmaceuticals, Inc. engaged PricewaterhouseCoopers LLP as its auditor.","evidence_excerpt":"On November 10, 2023, the Audit Committee approved the engagement of PricewaterhouseCoopers LLP (\"PwC\") as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1845337/000119312523277887/0001193125-23-277887-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"PricewaterhouseCoopers LLP"}],"fact_type":"auditor_change"},{"claim_id":"d4ce16c7ee28d40eca0fbff1d1b37f062e9a1e8d","claim":"Day One Biopharmaceuticals, Inc. dismissed Ernst & Young LLP as its auditor.","evidence_excerpt":"dismissed 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/1845337/000119312523277887/0001193125-23-277887-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"dismissal"},{"label":"Auditor","value":"Ernst & Young LLP"},{"label":"Successor","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"}