Biogen (BIIB) Stock Chart & Stock Price History $193.76 0.00 (0.00%) Closing price 05/22/2026 04:00 PM EasternExtended Trading$193.50 -0.26 (-0.13%) As of 05/22/2026 07:14 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 Massive. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy 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 increased 54.01%, with a year-to-date return of 10.10%. In the past month, the stock has increased 5.09%, reflecting recent market activity. As of the latest close, Biogen traded at $193.76 with a market cap of $28.61 billion and volume of 892,915 shares. Five years ago, the stock traded at $273.45, representing a 29.14% decrease over that period. At the time, it had a market cap of $41.17 billion and a volume of 938,253 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. Subscribe Now View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. By 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. 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Read our full terms of service and privacy policy. 5 Day Performance+3.17%1 Month Performance+5.09%3 Month Performance+1.59%Year-To-Date Performance+10.10%1 Year Performance+54.01%5 Year Performance-29.14% BIIB Stock Chart for Monday, May, 25, 2026 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 DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization05/22/2026$189.47$193.76+2.26%$194.75$190.01892,915 shs$28.61 billion05/21/2026$187.80$189.47+0.89%$190.27$185.851.47 million shs$27.97 billion05/20/2026$190.56$187.80-1.45%$193.38$186.37919,714 shs$27.73 billion05/19/2026$191.91$190.56-0.70%$193.03$188.641.05 million shs$28.13 billion05/18/2026$192.95$191.91-0.54%$193.37$189.191.05 million shs$28.33 billion05/15/2026$191.37$192.95+0.83%$194.91$190.661.25 million shs$28.49 billion05/14/2026$204.53$191.37-6.43%$205.00$189.492.81 million shs$28.25 billion05/13/2026$199.36$204.53+2.59%$205.97$198.861.27 million shs$30.20 billion05/12/2026$197.95$199.36+0.71%$202.40$196.471.15 million shs$29.43 billion05/11/2026$193.45$197.95+2.33%$200.31$194.751.77 million shs$29.22 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. 05/08/2026$191.38$193.45+1.08%$195.20$189.50931,535 shs$28.25 billion05/07/2026$190.68$191.38+0.37%$192.10$188.86735,565 shs$28.26 billion05/06/2026$189.13$190.68+0.82%$191.17$188.30741,347 shs$28.15 billion05/05/2026N/A$189.13$189.69$186.00586,061 shs$27.92 billion04/30/2026$194.38$189.28-2.62%$195.98$187.161.55 million shs$27.78 billion04/29/2026$183.38$194.38+6.00%$195.89$180.182.45 million shs$28.53 billion04/28/2026$180.67$183.38+1.50%$184.41$181.891.24 million shs$26.91 billion04/27/2026$184.38$180.67-2.01%$186.15$179.151.10 million shs$26.52 billion04/24/2026$187.88$184.38-1.86%$186.65$183.17723,329 shs$27.06 billion Related Companies Amgen Stock Chart Gilead Sciences Stock Chart Ionis Pharmaceuticals Stock Chart Moderna Stock Chart Prothena Stock Chart Vertex Pharmaceuticals Stock Chart AbbVie Stock Chart Bristol Myers Squibb Stock Chart Johnson & Johnson 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. This page (NASDAQ:BIIB) was last updated on 5/25/2026 by MarketBeat.com Staff. 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