Prothena (PRTA) Insider Trading & Ownership $6.58 +0.03 (+0.46%) Closing price 05/23/2025 04:00 PM EasternExtended Trading$4.98 -1.60 (-24.30%) As of 05/23/2025 08:00 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 Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Prothena (NASDAQ:PRTA) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage9.20%Number OfInsiders Buying(Last 12 Months)1Amount OfInsider Buying(Last 12 Months)$2.75 MNumber OfInsiders Selling(Last 12 Months)0 Get PRTA Insider Trade Alerts Want to know when executives and insiders are buying or selling Prothena stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. Email Address PRTA Insider Buying and Selling by Quarter Prothena Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type 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 Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails1/14/2025William P ScullyMajor ShareholderBuy100,000$12.79$1,279,000.00 12/31/2024William P ScullyMajor ShareholderBuy32,000$13.01$416,320.00 12/20/2024William P ScullyMajor ShareholderBuy2,000$15.91$31,820.00 12/18/2024William P ScullyMajor ShareholderBuy73,436$13.93$1,022,963.48 (Data available from 1/1/2013 forward) PRTA Insider Trading Activity - Frequently Asked Questions Who is on Prothena's Insider Roster? The list of insiders at Prothena includes Brandon S. Smith, Carol D. Karp, Dennis J Selkoe, Gene G Kinney, Hideki Garren, Karin L. Walker, Lars Ekman, Michael J. Malecek, Richard T Collier, Shane Cooke, Tran Nguyen, Wagner M. Zago, and William P Scully. Learn more on insiders at PRTA. What percentage of Prothena stock is owned by insiders? 9.20% of Prothena stock is owned by insiders. Learn more on PRTA's insider holdings. Which Prothena insiders have been buying company stock? The following insider purchased PRTA shares in the last 24 months: William P Scully ($2,750,103.48). How much insider buying is happening at Prothena? Insiders have purchased a total of 207,436 PRTA shares in the last 24 months for a total of $2,750,103.48 bought. Which Prothena insiders have been selling company stock? The following insiders have sold PRTA shares in the last 24 months: Brandon S. Smith ($1,308,375.34), Carol D. Karp ($847,550.00), Dennis J Selkoe ($337,150.00), Hideki Garren ($1,252,487.18), Karin L. Walker ($1,624,800.00), Michael J. Malecek ($1,495,900.00), and Wagner M. Zago ($1,618,340.00). How much insider selling is happening at Prothena? Insiders have sold a total of 142,333 Prothena shares in the last 24 months for a total of $8,484,602.52 sold. Prothena Key ExecutivesDr. Gene G. Kinney Ph.D. (Age 55)President, CEO & Director Compensation: $1MMr. Tran B. Nguyen M.B.A. (Age 50)CFO & Chief Strategy Officer Compensation: $830.14kMr. Brandon S. Smith (Age 49)Chief Operating Officer Compensation: $757.79kMs. Carol D. Karp (Age 71)Chief Regulatory Officer Compensation: $701.48kDr. Wagner M. Zago (Age 51)Chief Scientific Officer Compensation: $478.79kMr. Mark C. Johnson C.F.A.Vice President of Investor RelationsMr. Michael J. Malecek (Age 58)Chief Legal Officer Compensation: $588.25kMr. David A. Ford (Age 55)Chief People Officer Dr. Chad Swanson Ph.D.Chief Development OfficerMs. Yvonne M. TchrakianCompany Secretary More Insider Trading Tools from MarketBeat Related Companies IRON Insider Ownership IDYA Insider Ownership EWTX Insider Ownership JANX Insider Ownership IMCR Insider Ownership ADPT Insider Ownership VERA Insider Ownership DYN Insider Ownership GPCR Insider Ownership ANIP Insider Ownership Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles Turbulence for Joby Shares: What's Behind the Recent Dip?UnitedHealth Insiders Double Down: Is UNH Stock a Value Play?Sprouts Stock: Insider Sales, But Strong Bullish Signals5 Hot Small-Cap Insiders Bought at the Peak of Tariff FearsThe Top-Ranked Insider Buys From April by Market Cap This page (NASDAQ:PRTA) was last updated on 5/24/2025 by MarketBeat.com Staff From Our PartnersCollect $7k per month from Tesla’s SECRET dividendTesla doesn't pay a traditional dividend.... 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