Financials & Filings Latest Quarterly Financial Results Show all 2020 Third Quarter Prothena Reports Third Quarter 2020 Financial Results and Provides R&D Update Form 10-Q Proxy Statements Filing date View Mar 25, 2020 View HTML 0001140361-20-006746.pdf 0001140361-20-006746.xls Mar 28, 2019 View HTML 0001140361-19-005885.pdf 0001140361-19-005885.xls Form 10-K Filing date View Mar 3, 2020 View HTML 0001559053-20-000005.pdf 0001559053-20-000005.xls EX-101.INS - XBRL INSTANCE DOCUMENT Mar 15, 2019 View HTML 0001559053-19-000007.pdf 0001559053-19-000007.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