{"schema_version":"secwatch.filing_event.v1","accession":"0001559053-23-000019","form_type":"8-K","ticker":"PRTA","cik":"0001559053","company_name":"PROTHENA CORP PUBLIC LTD CO","filed_at":"2023-05-16T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.382374+00:00","generated_at":"2026-06-14T23:39:46.755676+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Prothena appoints Dr. William H. Dunn, Jr. to Board of Directors","bullets":["Dr. William H. Dunn, Jr., M.D. appointed to Board effective May 16, 2023.","Board size increased to accommodate the new appointment.","Dr. Dunn will receive standard non-employee director compensation per 2023 proxy.","He will enter into the Company's standard Deed of Indemnification.","No arrangements or understandings with others led to his selection; no reportable interests."],"urls":{"canonical":"https://secwatch.observer/filing/0001559053-23-000019","json":"https://secwatch.observer/filing/0001559053-23-000019.json","markdown":"https://secwatch.observer/filing/0001559053-23-000019.md","text":"https://secwatch.observer/filing/0001559053-23-000019.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1559053/000155905323000019/0001559053-23-000019-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1559053/000155905323000019/prta-20230516.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T23:39:46.755676+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":"28a1bfdb28","claim":"William H. Dunn, Jr., M.D. was appointed as Director at PROTHENA CORP PUBLIC LTD CO.","evidence_excerpt":"On May 16, 2023, the Board of Directors (the “Board”) of Prothena Corporation plc (the “Company”) increased the size of the Board and appointed William H. Dunn, Jr., M.D. to serve as a director of the Company, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1559053/000155905323000019/0001559053-23-000019-index.htm","confidence":1.0,"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"}