Biogen Inc. (BIIB)
NASDAQ: BIIB · Real-Time Price · USD
154.27
+4.66 (3.11%)
At close: Oct 31, 2025, 4:00 PM EDT
152.77
-1.50 (-0.97%)
After-hours: Oct 31, 2025, 5:55 PM EDT

Biogen Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Oct 31, 2025147.99155.18146.52154.27154.273.11%2,181,264
Oct 30, 2025140.10154.44138.00149.61149.611.18%2,745,188
Oct 29, 2025148.82149.91147.54147.86147.86-0.85%2,450,701
Oct 28, 2025150.01150.30148.37149.13149.13-0.86%1,662,855
Oct 27, 2025150.07150.92148.10150.43150.430.36%1,214,395
Oct 24, 2025151.09151.92148.98149.89149.89-0.13%1,338,315
Oct 23, 2025148.99150.29147.57150.08150.081.60%1,245,964
Oct 22, 2025147.37149.12146.25147.72147.721.03%1,403,299
Oct 21, 2025146.09147.89144.29146.22146.22-0.28%895,048
Oct 20, 2025143.31147.47142.41146.63146.632.54%1,316,452
Oct 17, 2025142.10144.33141.67143.00143.000.52%1,010,007
Oct 16, 2025144.05147.48141.70142.26142.26-0.97%1,469,099
Oct 15, 2025144.74145.19142.29143.66143.66-1.14%1,337,176
Oct 14, 2025144.09146.88142.20145.31145.310.43%1,283,553
Oct 13, 2025146.47147.56144.65144.69144.69-1.28%1,124,466
Oct 10, 2025150.00150.20144.74146.57146.57-2.03%1,724,990
Oct 9, 2025151.37152.15148.17149.61149.61-0.90%1,600,465
Oct 8, 2025152.36152.36149.64150.97150.97-0.81%1,333,277
Oct 7, 2025154.52154.58151.97152.21152.21-1.19%1,372,833
Oct 6, 2025159.61159.70153.10154.05154.05-3.65%1,817,888
Oct 3, 2025156.46160.20155.97159.88159.882.98%2,878,796
Oct 2, 2025154.00157.85152.22155.25155.250.67%2,882,551
Oct 1, 2025140.82154.44140.70154.22154.2210.09%4,059,913
Sep 30, 2025138.46141.04136.94140.08140.081.13%1,369,066
Sep 29, 2025137.49138.80135.39138.52138.520.84%1,285,534
Sep 26, 2025136.79138.00135.81137.37137.371.25%1,677,223
Sep 25, 2025138.40140.68135.41135.67135.67-1.45%1,260,311
Sep 24, 2025138.52139.28136.20137.67137.67-1.18%1,309,389
Sep 23, 2025140.27141.38138.73139.31139.31-0.96%1,103,063
Sep 22, 2025142.12142.64140.02140.66140.66-1.29%1,446,078
Sep 19, 2025143.96144.43141.49142.50142.50-0.91%3,748,754
Sep 18, 2025146.30146.45143.37143.81143.81-0.73%1,514,476
Sep 17, 2025143.48146.68143.39144.87144.870.83%1,502,045
Sep 16, 2025143.51147.23143.02143.68143.680.25%1,936,056
Sep 15, 2025144.82145.99141.12143.32143.32-1.06%1,432,587
Sep 12, 2025148.08150.28144.84144.86144.86-2.67%1,810,892
Sep 11, 2025143.47149.07142.86148.84148.844.37%1,714,600
Sep 10, 2025143.00143.45139.54142.61142.61-0.69%1,278,801
Sep 9, 2025141.16143.74140.51143.60143.601.59%1,490,789
Sep 8, 2025140.00143.23137.20141.35141.350.48%1,624,388
Sep 5, 2025140.13144.20139.96140.67140.670.52%1,561,897
Sep 4, 2025141.78142.28137.14139.94139.94-1.19%1,529,091
Sep 3, 2025139.56145.27139.56141.62141.621.43%2,244,285
Sep 2, 2025133.55140.06133.53139.63139.635.60%2,466,935
Aug 29, 2025132.50133.48131.52132.22132.22-0.32%1,083,013
Aug 28, 2025136.36136.36132.04132.65132.65-2.72%1,558,097
Aug 27, 2025136.00138.50135.79136.36136.36-0.26%1,403,137
Aug 26, 2025135.85136.91135.22136.72136.720.26%1,580,037
Aug 25, 2025139.01139.75136.14136.36136.36-2.12%861,976
Aug 22, 2025140.41142.32138.65139.31139.310.14%1,199,214