Biogen (BIIB) Stock Chart & Stock Price History $130.67 +2.92 (+2.29%) Closing price 08/8/2025 04:00 PM EasternExtended Trading$131.13 +0.46 (+0.35%) As of 08/8/2025 07:16 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 Biogen Stock Price Performance The Biogen (BIIB) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 35.31%, with a year-to-date return of -14.55%. In the past month, the stock has decreased 3.44%, reflecting recent market activity. As of the latest close, Biogen traded at $130.67 with a market cap of $19.16 billion and volume of 1.33 million shares. Five years ago, the stock traded at $300.26, representing a 56.48% decrease over that period. At the time, it had a market cap of $47.53 billion and a volume of 1.52 million shares. Receive BIIB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Biogen and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-1.67%1 Month Performance-3.44%3 Month Performance+10.55%Year-To-Date Performance-14.55%1 Year Performance-35.31%5 Year Performance-56.48% BIIB Stock Chart for Sunday, August, 10, 2025 BIIB Chart by TradingView Biogen 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 Capitalization08/08/2025$127.75$130.67+2.29%$131.26$127.001.33 million shs$19.16 billion08/07/2025$129.34$127.75-1.23%$130.68$127.651.72 million shs$18.73 billion08/06/2025$132.89$129.34-2.67%$132.67$128.901.54 million shs$18.96 billion08/05/2025$132.20$132.89+0.52%$134.16$131.571.40 million shs$19.48 billion08/04/2025$131.95$132.20+0.19%$133.98$130.391.90 million shs$19.38 billion08/01/2025$128.00$131.95+3.09%$132.90$124.562.80 million shs$19.33 billion07/31/2025$126.64$128.00+1.07%$135.43$127.243.24 million shs$18.76 billion07/30/2025$127.90$126.64-0.99%$129.78$125.971.89 million shs$18.56 billion07/29/2025$129.28$127.90-1.07%$129.26$127.601.11 million shs$18.74 billion07/28/2025$131.52$129.28-1.70%$131.85$128.431.05 million shs$18.94 billion Get the Latest News and Ratings for BIIB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Biogen and its competitors with MarketBeat's FREE daily newsletter. 07/25/2025$132.59$131.52-0.81%$133.05$130.13976,978 shs$19.27 billion07/24/2025$130.98$132.59+1.23%$132.65$130.001.28 million shs$19.43 billion07/23/2025$127.85$130.98+2.45%$131.25$128.361.13 million shs$19.19 billion07/22/2025$122.68$127.85+4.21%$127.94$123.381.32 million shs$18.73 billion07/21/2025$124.99$122.68-1.85%$125.42$121.051.40 million shs$18.31 billion07/18/2025$128.69$124.99-2.88%$129.58$124.681.52 million shs$18.31 billion07/17/2025$128.46$128.69+0.18%$129.21$127.311.15 million shs$18.86 billion07/16/2025$127.50$128.46+0.75%$129.51$127.421.23 million shs$18.82 billion07/15/2025$133.11$127.50-4.21%$133.36$127.471.32 million shs$18.68 billion07/14/2025$134.21$133.11-0.82%$134.21$132.40694,364 shs$19.50 billion07/11/2025$135.33$134.21-0.83%$134.59$132.371.14 million shs$19.67 billion07/10/2025$133.02$135.33+1.74%$137.19$132.77992,002 shs$19.83 billion07/09/2025$134.46$133.02-1.07%$137.84$131.671.53 million shs$19.49 billion Related Companies Amgen Stock Chart Gilead Sciences Stock Chart Ionis Pharmaceuticals Stock Chart Moderna Stock Chart Prothena Stock Chart Cassava Sciences Stock Chart Vertex Pharmaceuticals Stock Chart AbbVie Stock Chart Bristol Myers Squibb Stock Chart Eli Lilly and Company Stock Chart Receive BIIB Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Biogen and its competitors with MarketBeat's FREE daily newsletter. 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