Financials & Filings Latest Quarterly Financial Results Show all 2020 Fourth Quarter Prothena Reports Fourth Quarter and Full Year 2020 Financial Results, and Provides Financial Guidance and R&D Update Form 10-K Proxy Statements Filing date View Mar 31, 2021 View HTML 0001140361-21-011035.pdf 0001140361-21-011035.xls Mar 25, 2020 View HTML 0001140361-20-006746.pdf 0001140361-20-006746.xls Form 10-K Filing date View Feb 26, 2021 View HTML 0001559053-21-000008.pdf 0001559053-21-000008.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Mar 3, 2020 View HTML 0001559053-20-000005.pdf 0001559053-20-000005.xls EX-101.INS - XBRL INSTANCE DOCUMENT Form 10-Q Filing date View Nov 4, 2020 View HTML 0001559053-20-000040.pdf 0001559053-20-000040.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA Aug 6, 2020 View HTML 0001559053-20-000026.pdf 0001559053-20-000026.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA