{"schema_version":"secwatch.filing_event.v1","accession":"0001559053-26-000009","form_type":"8-K","ticker":"PRTA","cik":"0001559053","company_name":"PROTHENA CORP PUBLIC LTD CO","filed_at":"2026-02-27T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.427897+00:00","generated_at":"2026-05-15T23:02:23.980715+00:00","sec_items":["7.01","8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Prothena authorizes up to $100M share repurchase plan through Dec 31, 2026","bullets":["Board authorized repurchase of up to $100M of ordinary shares; plan expires Dec 31, 2026.","Company had $308.4M cash and no debt as of Dec 31, 2025.","Guidance (excluding buyback) expects ~$255M cash at year-end 2026.","Potential to earn up to $105M in clinical milestone payments from partners in 2026.","Repurchases are discretionary; no obligation to buy any shares."],"urls":{"canonical":"https://secwatch.observer/filing/0001559053-26-000009","json":"https://secwatch.observer/filing/0001559053-26-000009.json","markdown":"https://secwatch.observer/filing/0001559053-26-000009.md","text":"https://secwatch.observer/filing/0001559053-26-000009.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1559053/000155905326000009/0001559053-26-000009-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1559053/000155905326000009/prta-20260227.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T23:02:23.980715+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}