Prothena (PRTA) Options Chain & Prices $9.59 -0.17 (-1.74%) Closing price 05/18/2026 04:00 PM EasternExtended Trading$9.85 +0.26 (+2.66%) As of 05/18/2026 04:10 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 Massive. 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 12/18/2026 9/18/2026 7/17/2026 6/18/2026 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 VolatilityDeltaTrades6/18/2026$10.00$0.793Put150 - 1505(+0)51.88% (-15.70%)-0.57097516/18/2026$10.00$0.427Call553453 - 274(+0)51.88% (-15.70%)0.43487946/18/2026$11.00$1.550Put3 - 3159(+0)54.00% (-13.42%)-0.78364416/18/2026$11.00$0.181Call2611091501221(+516)54.00% (-13.42%)0.22562115End-of-day options data provided by Trade Alert and Intrinio. Related Companies and Tools Related Companies Adaptive Biotechnologies Options Bausch Health Cos Options Ocular Therapeutix Options Zai Lab Options Sarepta Therapeutics Options Trevi Therapeutics Options Stoke Therapeutics Options Tyra Biosciences Options AnaptysBio Options Inhibrx Biosciences Options Options Chain Tools Short Interest TrackerShort Interest IncreasesShort Interest DecreasesUnusual Call VolumeUnusual Put Volume This page (NASDAQ:PRTA) was last updated on 5/19/2026 by MarketBeat.com Staff. 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