Prothena (PRTA) Options Chain & Prices $9.39 -0.06 (-0.63%) Closing price 08/24/2026 04:00 PM EasternExtended Trading$9.48 +0.09 (+0.96%) As of 05:37 AM 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 Massive. Learn more. Add Compare Share Share Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsInsider TradesNews and TrendsOptions ChainOwnershipSEC FilingsShort Interest PRTA Put and Call Options List 1/21/2028 3/19/2027 1/15/2027 12/18/2026 10/16/2026 9/18/2026 Options Date Put and Call Options Put Options Call Options Options Type All In The Money Out of The Money Moneyness With Volume Without Volume All Volume Strike Price Min Strike Price Max Export ExpiresStrike PriceClose PricePut/CallVolumeVolume AskVolume BidOpen InterestImplied VolatilityDeltaTrades9/18/2026$9.00$0.367Put100298831(+0)57.12% (-3.80%)-0.356101119/18/2026$10.00$0.276Call437351509(+1395)51.01% (-2.61%)0.352774119/18/2026$11.00$0.099Call3 - 250(+10)54.16% (-5.79%)0.1547263End-of-day options data provided by Trade Alert and Intrinio. 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