Prothena (PRTA) Options Chain & Prices $10.35 +0.18 (+1.77%) Closing price 10/8/2025 04:00 PM EasternExtended Trading$10.35 0.00 (0.00%) As of 10/8/2025 07:29 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 Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock PRTA Put and Call Options List 1/21/2028 1/15/2027 3/20/2026 1/16/2026 12/19/2025 11/21/2025 10/17/2025 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 to Excel ExpiresStrike PriceClose PricePut/CallVolumeVolume AskVolume BidOpen InterestImplied VolatilityDeltaTrades10/17/2025$9.00$1.446Call211562(+0)84.72% (+8.40%)0.866591210/17/2025$10.00$0.612Call1 - 1231(-1)65.07% (+2.42%)0.649583110/17/2025$11.00$0.176Call2 - - 19(+4)63.61% (+3.67%)0.288761End-of-day options data provided by Trade Alert and Intrinio. 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