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Biogen Inc. (BIIB)
NASDAQ: BIIB · Real-Time Price · USD
188.24
+3.37 (1.82%)
At close: Mar 9, 2026, 4:00 PM EDT
187.90
-0.34 (-0.18%)
After-hours: Mar 9, 2026, 5:20 PM EDT

Biogen Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Mar 9, 2026183.91187.23182.60187.26-1.29%305,535
Mar 6, 2026186.25186.25181.24184.87184.87-1.71%772,743
Mar 5, 2026187.97190.99185.95188.08188.08-0.98%893,267
Mar 4, 2026185.06190.37183.16189.94189.943.22%951,766
Mar 3, 2026185.01187.05181.79184.02184.02-2.14%1,049,589
Mar 2, 2026190.22190.75186.72188.05188.05-1.97%690,801
Feb 27, 2026187.51192.46186.62191.82191.822.02%1,402,201
Feb 26, 2026190.30190.74185.90188.02188.02-1.42%988,117
Feb 25, 2026194.23196.73189.89190.73190.73-2.25%942,723
Feb 24, 2026196.03198.72194.43195.13195.13-0.62%716,382
Feb 23, 2026191.82197.05189.11196.34196.342.24%878,939
Feb 20, 2026190.78192.60189.95192.03192.03-0.03%799,225
Feb 19, 2026193.51195.00191.05192.08192.08-1.06%993,273
Feb 18, 2026195.32195.68193.11194.13194.13-0.76%1,049,036
Feb 17, 2026197.46200.29193.37195.62195.62-0.46%986,535
Feb 13, 2026196.27199.50195.52196.52196.520.52%1,352,792
Feb 12, 2026190.15196.00189.00195.50195.502.25%1,657,480
Feb 11, 2026188.35192.00187.20191.20191.201.17%996,929
Feb 10, 2026194.07195.72188.74188.99188.99-2.49%1,836,221
Feb 9, 2026199.83201.00191.88193.81193.81-3.66%2,096,252
Feb 6, 2026187.01202.41184.60201.18201.188.53%3,404,876
Feb 5, 2026184.87187.73184.54185.36185.36-0.05%2,542,641
Feb 4, 2026177.25186.24177.10185.45185.454.92%2,076,363
Feb 3, 2026177.79182.67176.19176.76176.76-1.30%1,594,142
Feb 2, 2026179.30180.76177.58179.09179.09-0.44%1,288,816
Jan 30, 2026177.09180.14175.96179.89179.892.11%1,487,978
Jan 29, 2026174.88177.20173.51176.18176.180.77%1,146,709
Jan 28, 2026173.63175.06170.85174.83174.830.41%1,304,662
Jan 27, 2026173.02176.14172.23174.12174.120.58%748,078
Jan 26, 2026171.67174.31170.59173.12173.120.89%1,049,188
Jan 23, 2026173.17173.90170.04171.59171.59-1.27%1,250,463
Jan 22, 2026171.78175.29171.65173.80173.800.68%996,425
Jan 21, 2026165.31172.87165.31172.62172.624.38%1,447,089
Jan 20, 2026161.51165.61160.37165.38165.380.58%1,879,947
Jan 16, 2026168.87169.34163.74164.42164.42-2.46%1,816,538
Jan 15, 2026169.03169.79166.79168.57168.57-0.44%1,562,727
Jan 14, 2026177.73178.41165.58169.31169.31-5.04%3,635,883
Jan 13, 2026185.42186.32177.05178.30178.30-3.95%1,597,380
Jan 12, 2026188.00188.00182.73185.63185.63-1.06%1,280,360
Jan 9, 2026186.74190.20186.49187.62187.620.87%1,416,702
Jan 8, 2026187.02187.77183.50186.00186.00-0.49%1,622,749
Jan 7, 2026181.70187.06181.70186.91186.912.35%2,122,447
Jan 6, 2026174.94182.97174.30182.61182.614.57%2,115,650
Jan 5, 2026175.73180.56171.61174.63174.63-1.79%1,663,631
Jan 2, 2026175.37178.24174.28177.82177.821.04%1,095,744
Dec 31, 2025175.76177.19175.02175.99175.99-0.23%890,441
Dec 30, 2025176.30176.99175.72176.40176.40-0.24%609,867
Dec 29, 2025177.00178.46176.31176.83176.83-0.14%928,193
Dec 26, 2025175.30177.19175.00177.08177.080.43%687,403
Dec 24, 2025175.73177.18175.37176.33176.330.86%434,748
Dec 23, 2025174.26175.58173.08174.82174.820.07%1,281,705
Dec 22, 2025174.78177.29172.90174.70174.70-0.06%1,909,529
Dec 19, 2025171.32176.42170.00174.80174.802.88%14,994,759
Dec 18, 2025171.59173.00168.56169.91169.91-1.27%2,761,018
Dec 17, 2025171.43173.83169.55172.10172.100.35%2,783,560
Dec 16, 2025174.51174.51169.52171.50171.50-2.41%2,408,490
Dec 15, 2025173.67175.94170.45175.74175.740.94%2,291,589
Dec 12, 2025173.49175.08171.27174.10174.100.93%1,781,471
Dec 11, 2025177.47180.79172.00172.50172.50-2.84%2,721,790
Dec 10, 2025173.30178.17169.24177.55177.550.97%2,147,901
Dec 9, 2025179.91181.99175.39175.84175.84-2.55%1,506,685
Dec 8, 2025181.30182.12179.21180.44180.44-0.47%1,474,568
Dec 5, 2025181.96183.15181.10181.30181.30-0.37%1,209,961
Dec 4, 2025181.86182.69179.27181.98181.980.68%1,246,342
Dec 3, 2025180.17182.94178.05180.75180.750.32%1,845,129
Dec 2, 2025177.32180.55174.53180.18180.181.35%1,866,647
Dec 1, 2025180.15181.78175.88177.78177.78-2.37%1,947,020
Nov 28, 2025182.07182.74180.69182.09182.090.08%566,362
Nov 26, 2025181.96183.93180.76181.94181.94-0.01%1,483,073
Nov 25, 2025177.07182.97176.09181.96181.962.91%2,344,782
Nov 24, 2025177.65185.17175.57176.82176.820.87%4,164,240
Nov 21, 2025168.54176.02167.42175.30175.304.23%2,268,169
Nov 20, 2025168.15170.91165.75168.18168.180.15%1,914,503
Nov 19, 2025168.83168.90165.79167.93167.93-0.53%1,765,993
Nov 18, 2025164.40170.78163.00168.83168.832.52%2,257,470
Nov 17, 2025167.00167.97163.50164.68164.68-1.71%2,245,006
Nov 14, 2025164.72169.00163.00167.55167.551.71%2,620,813
Nov 13, 2025161.57167.87161.20164.73164.732.01%2,993,001
Nov 12, 2025160.00162.56158.05161.48161.481.20%1,659,866
Nov 11, 2025156.76159.95154.20159.56159.562.11%1,504,613
Nov 10, 2025155.41156.55153.77156.26156.260.48%1,258,595
Nov 7, 2025156.70156.70151.83155.51155.51-0.78%1,552,011
Nov 6, 2025155.76157.80153.76156.74156.742.16%1,848,716
Nov 5, 2025149.66153.68148.51153.43153.432.75%1,806,070
Nov 4, 2025150.89152.90149.05149.33149.33-1.39%2,029,011
Nov 3, 2025153.60155.33149.63151.44151.44-1.83%2,197,357
Oct 31, 2025147.99155.18146.52154.27154.273.11%2,235,290
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