Alnylam Pharmaceuticals (ALNY) Stock Chart & Stock Price History $283.34 +29.80 (+11.75%) Closing price 03/21/2025 04:00 PM EasternExtended Trading$284.54 +1.20 (+0.42%) As of 03/21/2025 07:59 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Alnylam Pharmaceuticals Stock Price Performance 5 Day Performance+11.80%1 Month Performance+13.82%3 Month Performance+16.48%6 Month Performance+4.55%Year-To-Date Performance+20.41%1 Year Performance+93.39% 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. Email Address ALNY Stock Chart for Monday, March, 24, 2025 ALNY Chart by TradingViewRemove Ads Alnylam Pharmaceuticals 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 Capitalization03/21/2025$253.60$283.34+11.73%$289.44$261.003.15 million shs$36.68 billion03/20/2025$253.44$253.60+0.06%$261.90$252.39799,079 shs$32.83 billion03/19/2025$244.30$253.44+3.74%$255.35$243.44987,380 shs$32.81 billion03/18/2025$253.11$244.30-3.48%$263.30$243.87873,930 shs$31.63 billion03/17/2025$241.76$253.11+4.69%$253.30$240.94597,969 shs$32.77 billion03/14/2025$241.75$241.76+0.00%$244.04$239.53478,821 shs$31.30 billion03/13/2025$242.43$241.75-0.28%$245.14$239.02475,338 shs$31.38 billion03/12/2025$238.74$242.43+1.55%$246.37$240.39592,953 shs$31.38 billion03/11/2025$233.07$238.74+2.43%$243.45$230.79603,109 shs$30.91 billion03/10/2025$244.52$233.07-4.68%$244.33$232.84566,279 shs$30.17 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. 03/07/2025$248.13$244.52-1.45%$251.12$240.98476,135 shs$31.65 billion03/06/2025$249.23$248.13-0.44%$252.84$244.57570,724 shs$32.12 billion03/05/2025$242.93$249.23+2.59%$249.82$241.55645,250 shs$32.26 billion03/04/2025$243.53$242.93-0.25%$244.67$238.42545,555 shs$31.45 billion03/03/2025$246.75$243.53-1.30%$250.00$241.91833,613 shs$31.53 billion02/28/2025$237.18$246.75+4.03%$249.34$236.501.18 million shs$31.94 billion02/27/2025$243.86$237.18-2.74%$246.38$236.551.16 million shs$30.71 billion02/26/2025$245.20$243.86-0.55%$251.60$243.45686,686 shs$31.57 billion02/25/2025$248.94$245.20-1.50%$251.56$238.461.24 million shs$31.74 billion02/24/2025$250.59$248.94-0.66%$256.47$248.45689,134 shs$32.23 billion Related Companies Regeneron Pharmaceuticals Stock Price Chart Biogen Stock Price Chart United Therapeutics Stock Price Chart BioMarin Pharmaceutical Stock Price Chart Incyte Stock Price Chart Neurocrine Biosciences Stock Price Chart Exelixis Stock Price Chart Repligen Stock Price Chart Exact Sciences Stock Price Chart Halozyme Therapeutics 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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