Altimmune (ALT) Options Chain & Prices $2.95 -0.17 (-5.45%) Closing price 08/20/2026 04:00 PM EasternExtended Trading$2.98 +0.03 (+0.98%) As of 08:41 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 EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock ALT Put and Call Options List 1/21/2028 3/19/2027 1/15/2027 12/18/2026 10/16/2026 10/2/2026 9/25/2026 9/18/2026 9/11/2026 9/4/2026 8/28/2026 8/21/2026 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 VolatilityDeltaTrades8/21/2026$2.50$0.446Call2 - 2448(+0)135.47% (-18.46%)0.9893518/21/2026$3.00$0.081Put1 - - 1451(-13)77.63% (+3.03%)-0.66419418/21/2026$3.00$0.026Call5711254495(+1376)77.63% (+3.03%)0.33557811End-of-day options data provided by Trade Alert and Intrinio. Related Companies and Tools Related Companies VERA Options VCEL Options BHVN Options NUVB Options PGEN Options ADMA Options AUPH Options MESO Options STOK Options AGIO Options Options Chain Tools Short Interest TrackerShort Interest IncreasesShort Interest DecreasesUnusual Call VolumeUnusual Put Volume This page (NASDAQ:ALT) was last updated on 8/21/2026 by MarketBeat.com Staff. From Our PartnersALERT: Drop these 5 stocks before the market opens tomorrow!The Wall Street Journal is already raising the alarm about a potential market crash, and Weiss Ratings researc...Weiss Ratings | SponsoredLouis Navellier: My #1 AI stock for 2026 (name & ticker inside)Louis Navellier's Stock Grader system helped him flag Nvidia before its 82,000% run and has identified the top...InvestorPlace | SponsoredReady to give options a try? 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