Altimmune (ALT) Stock Chart & Stock Price History $4.53 -0.10 (-2.16%) Closing price 04/15/2025 04:00 PM EasternExtended Trading$4.46 -0.07 (-1.57%) As of 07:01 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 Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Altimmune Stock Price Performance 5 Day Performance+2.72%1 Month Performance-23.48%3 Month Performance-32.49%6 Month Performance-33.97%Year-To-Date Performance-37.17%1 Year Performance-39.76% Receive ALT Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Altimmune and its competitors with MarketBeat's FREE daily newsletter. Email Address ALT Stock Chart for Wednesday, April, 16, 2025 ALT Chart by TradingViewRemove Ads Altimmune Stock Price History Daily Weekly Monthly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization04/15/2025$4.63$4.53-2.16%$4.71$4.431.28 million shs$348.87 million04/14/2025$4.41$4.63+4.99%$4.75$4.432.29 million shs$356.58 million04/11/2025$4.16$4.41+6.01%$4.41$4.121.42 million shs$339.63 million04/10/2025$4.23$4.16-1.65%$4.28$3.932.12 million shs$320.38 million04/09/2025$3.67$4.23+15.26%$4.47$3.603.99 million shs$325.77 million04/09/2025$3.67$4.23+15.26%$4.47$3.603.99 million shs$325.77 million04/08/2025$3.98$3.67-7.79%$4.21$3.552.76 million shs$282.64 million04/08/2025$3.98$3.67-7.79%$4.21$3.552.76 million shs$282.64 million04/07/2025$4.24$3.98-6.13%$4.22$3.753.56 million shs$306.52 million04/04/2025$4.46$4.24-4.93%$4.44$4.132.99 million shs$326.54 million Get the Latest News and Ratings for ALT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Altimmune and its competitors with MarketBeat's FREE daily newsletter. 04/03/2025$4.78$4.46-6.69%$4.73$4.432.01 million shs$343.48 million04/02/2025$4.74$4.78+0.84%$4.96$4.652.83 million shs$368.13 million04/01/2025$5.00$4.74-5.20%$5.13$4.702.39 million shs$365.05 million03/31/2025$5.32$5.00-6.02%$5.12$4.783.60 million shs$385.07 million03/28/2025$5.57$5.32-4.49%$5.57$5.301.33 million shs$409.71 million03/27/2025$5.59$5.57-0.36%$5.63$5.451.62 million shs$428.97 million03/26/2025$5.89$5.59-5.09%$5.92$5.561.43 million shs$430.51 million03/25/2025$6.05$5.89-2.64%$6.04$5.841.59 million shs$453.61 million03/24/2025$5.79$6.05+4.44%$6.16$5.822.30 million shs$465.94 million03/21/2025$5.78$5.79+0.22%$5.87$5.602.04 million shs$446.14 million03/20/2025$5.81$5.78-0.52%$5.87$5.641.69 million shs$445.14 million03/19/2025$5.61$5.81+3.57%$5.88$5.551.74 million shs$447.45 million03/18/2025$5.97$5.61-6.03%$5.89$5.482.53 million shs$432.05 million03/17/2025$5.92$5.97+0.84%$6.01$5.455.87 million shs$459.77 million Related Companies Amphastar Pharmaceuticals Stock Price Chart Calliditas Therapeutics AB (publ) Stock Price Chart Adaptive Biotechnologies Stock Price Chart Ardelyx Stock Price Chart Qilian International Holding Group Stock Price Chart Evotec Stock Price Chart Aurinia Pharmaceuticals Stock Price Chart Ocular Therapeutix Stock Price Chart Iovance Biotherapeutics Stock Price Chart Syndax Pharmaceuticals Stock Price Chart Receive ALT Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Altimmune and its competitors with MarketBeat's FREE daily newsletter. 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