{"schema_version":"secwatch.filing_event.v1","accession":"0001559053-24-000005","form_type":"8-K","ticker":"PRTA","cik":"0001559053","company_name":"PROTHENA CORP PUBLIC LTD CO","filed_at":"2024-02-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:24.603357+00:00","generated_at":"2026-06-05T22:03:12.057886+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Prothena appoints Daniel G. Welch as director and Chair Designate","bullets":["Board expanded to add Daniel G. Welch as director effective Feb 21, 2024; to be proposed as Chair at next AGM.","Welch granted option for 132,000 ordinary shares, vesting over five years at the Feb 21 closing price.","Annual cash retainer of $90,000 as Chair Designate and future Chair, plus standard non-employee director compensation.","Welch will enter standard indemnification agreement; no material interest in any related transactions."],"urls":{"canonical":"https://secwatch.observer/filing/0001559053-24-000005","json":"https://secwatch.observer/filing/0001559053-24-000005.json","markdown":"https://secwatch.observer/filing/0001559053-24-000005.md","text":"https://secwatch.observer/filing/0001559053-24-000005.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1559053/000155905324000005/0001559053-24-000005-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1559053/000155905324000005/prta-20240221.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T22:03:12.057886+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":"2d1cac6de1","claim":"Daniel G. Welch was appointed as Director and Chair Designate at PROTHENA CORP PUBLIC LTD CO.","evidence_excerpt":"On February 21, 2024, the Board of Directors (the “Board”) of Prothena Corporation plc (the “Company”) increased the size of the Board and appointed Daniel G. Welch 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/1559053/000155905324000005/0001559053-24-000005-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director and Chair Designate"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}