{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-22-304802","form_type":"8-K","ticker":"PSNL","cik":"0001527753","company_name":"Personalis, Inc.","filed_at":"2022-12-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:51.028758+00:00","generated_at":"2026-06-21T04:44:44.647138+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Personalis CEO John West retires; CFO Aaron Tachibana named interim CEO","bullets":["CEO John West to retire as CEO and director effective Dec 31, 2022; will serve as advisor.","CFO Aaron Tachibana appointed interim CEO; Christopher Hall named President, effective Dec 31, 2022.","West receives 12 months base salary severance, COBRA subsidy, and 24-month equity acceleration.","West to provide consulting services from Jan 4 to Jun 30, 2023 at $5,000/month; option exercise extended to Dec 31, 2023.","Board initiates search for permanent CEO."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-22-304802","json":"https://secwatch.observer/filing/0001193125-22-304802.json","markdown":"https://secwatch.observer/filing/0001193125-22-304802.md","text":"https://secwatch.observer/filing/0001193125-22-304802.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1527753/000119312522304802/0001193125-22-304802-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1527753/000119312522304802/d429468d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-21T04:44:44.647138+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":"05606cc9b7","claim":"Christopher Hall was appointed as President at Personalis, Inc..","evidence_excerpt":"and Christopher Hall, the Company’s SVP and Head, Diagnostics Business, to serve as President, each effective December 31, 2022.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1527753/000119312522304802/0001193125-22-304802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President"}],"fact_type":"executive_change"},{"claim_id":"6e1c87bc40","claim":"John West retired as Chief Executive Officer and Director at Personalis, Inc..","evidence_excerpt":"On December 9, 2022, John West, co-founder, Chief Executive Officer and member of the board of directors (the “Board”) of Personalis, Inc. (the “Company”) notified the Company of his decision to retire as Chief Executive Officer and as a director of the Company, effective as of December 31, 2022.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1527753/000119312522304802/0001193125-22-304802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Chief Executive Officer and Director"}],"fact_type":"executive_change"},{"claim_id":"90867c2c43","claim":"Aaron Tachibana was appointed as interim Chief Executive Officer at Personalis, Inc..","evidence_excerpt":"The Board has appointed Aaron Tachibana, the Company’s Chief Financial Officer, to serve as interim Chief Executive Officer","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1527753/000119312522304802/0001193125-22-304802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"interim Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}