{"schema_version":"secwatch.filing_event.v1","accession":"0001171843-24-002452","form_type":"8-K","ticker":"ABUS","cik":"0001447028","company_name":"Arbutus Biopharma Corp","filed_at":"2024-05-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:18.457764+00:00","generated_at":"2026-06-03T00:17:17.125044+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Arbutus CSO Michael Sofia to retire Dec 31, 2024; no successor named yet.","bullets":["Dr. Michael Sofia, co-founder and Chief Scientific Officer, notified retirement effective December 31, 2024.","Sofia is a Lasker award-winning antiviral drug discovery scientist with 38-year career.","Interim CEO Michael McElhaugh thanked Sofia for contributions to HBV functional cure development.","No replacement for CSO role announced; company continues clinical development."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-24-002452","json":"https://secwatch.observer/filing/0001171843-24-002452.json","markdown":"https://secwatch.observer/filing/0001171843-24-002452.md","text":"https://secwatch.observer/filing/0001171843-24-002452.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1447028/000117184324002452/0001171843-24-002452-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1447028/000117184324002452/f8k_050124.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T00:17:17.125044+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":"4ca0a1d83f","claim":"Michael Sofia departed as Chief Scientific Officer at Arbutus Biopharma Corp.","evidence_excerpt":"On May 1, 2024, Dr. Michael Sofia notified Arbutus Biopharma Corporation (the “Company”) of his retirement as Chief Scientific Officer of the Company, effective December 31, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1447028/000117184324002452/0001171843-24-002452-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"notified retirement"},{"label":"Role","value":"Chief Scientific Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}