{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-23-003560","form_type":"8-K","ticker":"ARWR","cik":"0000879407","company_name":"ARROWHEAD PHARMACEUTICALS, INC.","filed_at":"2023-02-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:48.360412+00:00","generated_at":"2026-06-19T15:00:57.545976+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Director Marianne De Backer resigns from Arrowhead board effective April 2, 2023","bullets":["Marianne De Backer notified Arrowhead of her resignation as director, effective April 2, 2023.","De Backer served as independent director, on Audit, Compensation, and as Chair of Nomination Committee.","Resignation due to her appointment as CEO and director of Vir Biotechnology; no disagreement with Arrowhead."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-23-003560","json":"https://secwatch.observer/filing/0001628280-23-003560.json","markdown":"https://secwatch.observer/filing/0001628280-23-003560.md","text":"https://secwatch.observer/filing/0001628280-23-003560.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/879407/000162828023003560/0001628280-23-003560-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/879407/000162828023003560/arwr-20230211.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-19T15:00:57.545976+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":"f65b990792","claim":"Marianne De Backer resigned as director at ARROWHEAD PHARMACEUTICALS, INC..","evidence_excerpt":"On February 11, 2023, Marianne De Backer , a director of Arrowhead Pharmaceuticals, Inc. (the “Company”), notified the Company of her decision to resign as a director, effective as of April 2, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/879407/000162828023003560/0001628280-23-003560-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}