Mersana Therapeutics (MRSN) Options Chain & Prices $10.05 -0.37 (-3.55%) Closing price 10/21/2025 04:00 PM EasternExtended Trading$9.90 -0.16 (-1.54%) As of 10/21/2025 04:57 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 EventsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock MRSN Put and Call Options List 2/20/2026 1/16/2026 11/21/2025 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 VolatilityDeltaTradesEnd-of-day options data provided by Trade Alert and Intrinio. 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