Alnylam Pharmaceuticals (ALNY) Stock Chart & Stock Price History $446.51 -5.82 (-1.29%) Closing price 08/29/2025 04:00 PM EasternExtended Trading$446.62 +0.11 (+0.02%) As of 08/29/2025 05:37 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 Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Alnylam Pharmaceuticals Stock Price Performance The Alnylam Pharmaceuticals (ALNY) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 69.98%, with a year-to-date return of 89.75%. In the past month, the stock has increased 11.13%, reflecting recent market activity. As of the latest close, Alnylam Pharmaceuticals traded at $446.51 with a market cap of $58.53 billion and volume of 827,614 shares. Five years ago, the stock traded at $130.41, representing a 242.39% increase over that period. At the time, it had a market cap of $15.24 billion and a volume of 475,400 shares. Receive ALNY Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Alnylam Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. 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Read our full terms of service and privacy policy. 5 Day Performance-1.69%1 Month Performance+11.13%3 Month Performance+46.59%Year-To-Date Performance+89.75%1 Year Performance+69.98%5 Year Performance+242.39% ALNY Stock Chart for Monday, September, 1, 2025 ALNY Chart by TradingView Alnylam Pharmaceuticals Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/29/2025$452.33$446.51-1.29%$453.96$444.79827,614 shs$58.53 billion08/28/2025$454.18$452.33-0.41%$457.29$451.12641,005 shs$59.29 billion08/27/2025$451.20$454.18+0.66%$455.45$447.63906,724 shs$59.53 billion08/26/2025$443.64$451.20+1.70%$451.50$444.251.18 million shs$59.14 billion08/25/2025$454.38$443.64-2.36%$458.75$442.381.20 million shs$58.15 billion08/22/2025$467.55$454.38-2.82%$469.81$454.201.08 million shs$59.56 billion08/21/2025$458.31$467.55+2.02%$467.71$454.68760,116 shs$61.29 billion08/20/2025$458.28$458.31+0.01%$466.31$456.061.22 million shs$60.08 billion08/19/2025$456.87$458.28+0.31%$462.88$450.881.32 million shs$60.07 billion08/18/2025$448.91$456.87+1.77%$457.92$447.101.61 million shs$59.89 billion Get the Latest News and Ratings for ALNY and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Alnylam Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 08/15/2025$442.73$448.91+1.40%$449.52$438.22713,353 shs$58.84 billion08/14/2025$432.52$442.73+2.36%$443.98$428.991.26 million shs$58.03 billion08/13/2025$429.93$432.52+0.60%$438.23$421.812.09 million shs$56.69 billion08/12/2025$435.00$429.93-1.17%$437.00$428.301.51 million shs$56.36 billion08/11/2025$438.93$435.00-0.90%$445.20$426.19988,636 shs$57.02 billion08/08/2025$435.10$438.93+0.88%$439.36$427.66901,269 shs$57.53 billion08/07/2025$428.14$435.10+1.63%$436.77$425.811.15 million shs$57.03 billion08/06/2025$418.91$428.14+2.20%$428.69$415.001.18 million shs$56.12 billion08/05/2025$419.55$418.91-0.15%$426.76$410.491.81 million shs$54.91 billion08/04/2025$401.80$419.55+4.42%$422.64$398.911.46 million shs$54.99 billion08/01/2025$392.24$401.80+2.44%$401.80$382.191.78 million shs$52.39 billion07/31/2025$339.80$392.24+15.43%$402.43$350.003.35 million shs$51.14 billion Related Companies Amgen Stock Price Chart Gilead Sciences Stock Price Chart Vertex Pharmaceuticals Stock Price Chart Regeneron Pharmaceuticals Stock Price Chart Biogen Stock Price Chart Incyte Stock Price Chart United Therapeutics Stock Price Chart Neurocrine Biosciences Stock Price Chart BioMarin Pharmaceutical Stock Price Chart Exelixis Stock Price Chart Receive ALNY Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Alnylam Pharmaceuticals and its competitors with MarketBeat's FREE daily newsletter. 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