Prothena (PRTA) SEC Filings & 10K Form $14.33 -1.48 (-9.36%) Closing price 03/3/2025 04:00 PM EasternExtended Trading$16.04 +1.71 (+11.90%) As of 03/3/2025 07:42 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share SEC Filings Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrends Recent Prothena SEC Filings All Filing Types 1 10 10-D 10-K 10-M 10-Q 11-K 12b-25 13F 13H 144 15 15F 17-H 18 18-K 19b-4(e) 19b-4 19b-7 1-A 1-E 1-K 1-N 1-SA 1-U 1-Z 20-F 24F-2 25 2-E 3 4 40-F 5 6-K 7-M 8-A 8-K 8-M 9-M ABS DD-15E ABS-15G ABS-EE ADV ADV-E ADV-H ADV-NR ADV-W ATS ATS-R BD BD-N BDW C CA-1 CB CFPORTAL D F-1 F-10 F-3 F-4 F-6 F-7 F-8 F-80 F-N F-X ID MA MA-I MA-NR MA-W MSD MSDW n/a N-14 N-17D-1 N-17f-1 N-17f-2 N-18f-1 N-1A N-2 N-23c-3 N-27D-1 N-3 N-4 N-5 N-54A N-54C N-6 N-6EI-1 N-6F N-8A N-8B-2 N-8B-4 N-8F N-CR N-CSR N-MFP N-PX N-Q NRSRO N-SAR PF PILOT R31 S-1 S-11 S-20 S-3 S-4 S-6 S-8 SBSE SBSE-A SBSE-BD SBSE-C SBSE-W SCI SD SDR SE SF-1 SF-3 SIP T-1 T-2 T-3 T-4 T-6 TA-1 TA-2 TA-W TCR TH WB-APP X-17A-19 X-17A-5 Part I X-17A-5 Part II X-17A-5 Part IIA X-17A-5 Part IIB X-17A-5 Part III X-17A-5 Schedule I X-17F-1A Filing Types Include Ownership Filings Exclude Ownership Filings Only Show Ownership FIlings Ownership Filings Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame * Start Date * End Date Export to Excel DateFilerForm TypeView02/21/20251:49 PMProthena (Subject)SCULLY WILLIAM P (Filed by)Form SCHEDULE 13G/A02/20/20253:07 PMProthena (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 02/14/20255:34 PMNguyen Tran (Reporting)Prothena (Issuer)Form 4Statement of changes in beneficial ownership of securities 02/14/20252:35 PMFennell Todd W. (Filed by)Prothena (Subject)Form SCHEDULE 13G/A02/10/20259:25 AMProthena (Subject)WELLINGTON MANAGEMENT GROUP LLP (Filed by)Form SCHEDULE 13G/A01/03/20256:45 PMEcoR1 Capital, LLC (Filed by)Prothena (Subject)Form SCHEDULE 13D/A12/30/20243:07 PMProthena (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 11/13/20246:00 AMFennell Todd W. (Filed by)Prothena (Subject)Form SC 13G/A11/13/20245:06 AMProthena (Subject)SCULLY WILLIAM P (Filed by)Form SC 13G/A11/08/20249:46 AMProthena (Subject)WELLINGTON MANAGEMENT GROUP LLP (Filed by)Form SC 13G11/07/20248:33 AMProthena (Subject)WELLINGTON MANAGEMENT GROUP LLP (Filed by)Form SC 13G/A10/18/20249:54 AMProthena (Subject)STATE STREET CORP (Filed by)Form SC 13G/A10/03/20245:57 PMProthena (Issuer)Swanson Chad J. (Reporting)Form 3Initial statement of beneficial ownership of securities 10/03/20245:58 PMProthena (Issuer)Swanson Chad J. (Reporting)Form 4Statement of changes in beneficial ownership of securities 09/27/20243:13 PMProthena (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 08/08/20244:13 PMProthena (Filer)Form S-8Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans 05/17/20243:31 PMCOLLIER RICHARD T (Reporting)Prothena (Issuer)Form 4Statement of changes in beneficial ownership of securities 05/17/20243:35 PMCooke Shane (Reporting)Prothena (Issuer)Form 4Statement of changes in beneficial ownership of securities 03/29/20244:02 PMProthena (Filer)Form DEF 14A03/29/20244:05 PMProthena (Filer)Form DEFA14A03/29/20244:07 PMProthena (Filer)Form ARS03/05/20248:01 PMFord David A (Reporting)Prothena (Issuer)Form 3Initial statement of beneficial ownership of securities 03/05/20248:03 PMFord David A (Reporting)Prothena (Issuer)Form 4Statement of changes in beneficial ownership of securities (Data available from 1/1/2016 forward) Related Companies and Tools Related Companies Viking Therapeutics SEC Filings ACADIA Pharmaceuticals SEC Filings Crinetics Pharmaceuticals SEC Filings Merus SEC Filings Metsera SEC Filings Denali Therapeutics SEC Filings Xenon Pharmaceuticals SEC Filings MorphoSys SEC Filings HUTCHMED SEC Filings Bausch Health Companies SEC Filings SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NASDAQ:PRTA) was last updated on 3/4/2025 by MarketBeat.com Staff From Our PartnersHas Trump finally met his match?Dylan Jovine predicted the 2008 crash over a year before it happened. 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