{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-24-005998","form_type":"8-K","ticker":"ARWR","cik":"0000879407","company_name":"ARROWHEAD PHARMACEUTICALS, INC.","filed_at":"2024-02-22T23:59:59+00:00","discovered_at":"2026-05-14T18:03:27.115682+00:00","generated_at":"2026-06-05T21:25:24.194911+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Arrowhead appoints Hongbo Lu to board; expands to 8 members","bullets":["Hongbo Lu, Ph.D., appointed as independent director effective April 1, 2024, increasing board from 7 to 8.","Lu brings over 20 years of healthcare investment experience, including Managing Partner at Vivo Capital and LAV.","She receives standard non-employee director compensation plus sign-on RSU grant valued at $761,666 vesting over three years.","No family relationships or material interests with Arrowhead directors or officers disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-24-005998","json":"https://secwatch.observer/filing/0001628280-24-005998.json","markdown":"https://secwatch.observer/filing/0001628280-24-005998.md","text":"https://secwatch.observer/filing/0001628280-24-005998.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/879407/000162828024005998/0001628280-24-005998-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/879407/000162828024005998/arwr-20240221.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T21:25:24.194911+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":"86ec733234","claim":"Hongbo Lu was appointed as Director at ARROWHEAD PHARMACEUTICALS, INC..","evidence_excerpt":"On February 21, 2024, the Board of Directors of Arrowhead Pharmaceuticals, Inc. (the “Company”) announced that it would increase the size of the Company's board of directors (\"Board\") from seven to eight members and appoint Hongbo Lu, Ph.D., as an independent director of the Company, effective April 1, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024005998/0001628280-24-005998-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"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"}