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 Apr 10, 2013 View HTML 0001193125-13-149288.pdf 0001193125-13-149288.xls Mar 31, 2014 View HTML 0001559053-14-000021.pdf 0001559053-14-000021.xls Form 10-K Filing date View Mar 29, 2013 View HTML 0001193125-13-133056.pdf 0001193125-13-133056.xls Mar 7, 2014 View HTML 0001559053-14-000007.pdf 0001559053-14-000007.xls EX-101.INS - XBRL INSTANCE DOCUMENT Form 10-Q Filing date View May 15, 2013 View HTML 0001193125-13-220259.pdf 0001193125-13-220259.xls EX-101.INS - XBRL INSTANCE DOCUMENT Aug 13, 2013 View HTML 0001193125-13-331182.pdf 0001193125-13-331182.xls EX-101.INS - XBRL INSTANCE DOCUMENT