{"schema_version":"secwatch.filing_event.v1","accession":"0001559053-22-000040","form_type":"8-K","ticker":"PRTA","cik":"0001559053","company_name":"PROTHENA CORP PUBLIC LTD CO","filed_at":"2022-10-31T23:59:59+00:00","discovered_at":"2026-05-14T18:03:51.144755+00:00","generated_at":"2026-06-22T21:39:36.151907+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Prothena enters sublease for 31,157 sq ft in Brisbane, CA; rent starts July 2023","bullets":["PBI subleases ~31,157 sq ft from Arcus Biosciences at 1800 Sierra Point Parkway, Brisbane, CA.","Term ends Sep 30, 2028; rent begins Jul 1, 2023 with monthly base rent ~$241,467 in year 1.","Rent increases ~3.5% annually; first six months rent abated.","Improvement allowance of ~$9.35M from sublandlord for construction and prep.","Standby letter of credit ~$860,360 posted to secure obligations."],"urls":{"canonical":"https://secwatch.observer/filing/0001559053-22-000040","json":"https://secwatch.observer/filing/0001559053-22-000040.json","markdown":"https://secwatch.observer/filing/0001559053-22-000040.md","text":"https://secwatch.observer/filing/0001559053-22-000040.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1559053/000155905322000040/0001559053-22-000040-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1559053/000155905322000040/prta-20221028.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-22T21:39:36.151907+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":"c895e044a43f3723db66c5b53c084281db31b5cd","claim":"PROTHENA CORP PUBLIC LTD CO entered into Sublease with Arcus Biosciences, Inc. valued at approximately $9,347,100.00 (effective 2022-10-28).","evidence_excerpt":"On October 28, 2022, Prothena Biosciences Inc (“PBI”), a wholly owned subsidiary of Prothena Corporation plc (the “Company”), entered into a Sublease (the “Sublease”) with Arcus Biosciences, Inc., a Delaware corporation (“Sublandlord”), to sublease approximately 31,157 square feet of office and laboratory space located at 1800 Sierra Point Parkway, Brisbane, California (the “New Facility”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1559053/000155905322000040/0001559053-22-000040-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"lease"},{"label":"Counterparty","value":"Arcus Biosciences, Inc."},{"label":"Value","value":"approximately $9,347,100.00"},{"label":"Effective","value":"2022-10-28"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}