{"schema_version":"secwatch.filing_event.v1","accession":"0001576280-23-000049","form_type":"8-K","ticker":"GH","cik":"0001576280","company_name":"Guardant Health, Inc.","filed_at":"2023-04-10T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.478463+00:00","generated_at":"2026-06-17T04:08:25.181281+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Guardant Health replaces EY with Deloitte as independent auditor; no disagreements cited","bullets":["Audit committee approved dismissal of Ernst & Young and engagement of Deloitte effective April 4, 2023.","EY's audit reports for FY2022 and FY2021 were unqualified with no adverse opinion.","No disagreements or reportable events occurred during the past two fiscal years or subsequent interim period.","EY agreed with the disclosures in a letter dated April 10, 2023, filed as Exhibit 16.1."],"urls":{"canonical":"https://secwatch.observer/filing/0001576280-23-000049","json":"https://secwatch.observer/filing/0001576280-23-000049.json","markdown":"https://secwatch.observer/filing/0001576280-23-000049.md","text":"https://secwatch.observer/filing/0001576280-23-000049.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/0001576280-23-000049-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/gh-20230404.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T04:08:25.181281+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":"a41c89edc6708a3915fcada9947639ebbed23bfe","claim":"Guardant Health, Inc. dismissed Ernst & Young LLP as its auditor.","evidence_excerpt":"dismissed Ernst & Young LLP (“Ernst & Young”) as the Company’s independent registered public accounting firm, each effective immediately.","evidence_source":"SEC 8-K Item 4.01/4.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1576280/000157628023000049/0001576280-23-000049-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"dismissal"},{"label":"Auditor","value":"Ernst & Young LLP"},{"label":"Successor","value":"Deloitte & Touche LLP"}],"fact_type":"auditor_change"},{"claim_id":"f18df5f70d1b36e25a407005f16f841ba98e0ed1","claim":"Guardant Health, Inc. engaged Deloitte & Touche LLP as its auditor.","evidence_excerpt":"approved the engagement of Deloitte & Touche LLP (“Deloitte”) 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/1576280/000157628023000049/0001576280-23-000049-index.htm","confidence":0.9,"family_label":"Auditor Changes","details":[{"label":"Action","value":"engagement"},{"label":"Auditor","value":"Deloitte & Touche LLP"}],"fact_type":"auditor_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}