Biogen Inc. (BIIB) NASDAQ

Currency In USD

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BIIB Historical Return

If you invested $1000 in Biogen Inc. (BIIB) 10 years ago, it would be worth $809.41 as of October 15, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $839.57, while $1000 invested 1 year ago would be worth $1,643.32. This corresponds to total returns of -19.06%, -16.04%, 64.33%, respectively, with annualized returns of -2.09%, -3.43%, 64.33%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

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BIIB Historical Data

Date Range:

DateOpenCloseAdj CloseHighLowVolume
October 14, 2026228.99232.83232.83234.22281.86M
October 13, 2026230.34228.9228.9231.04226.711.05M
October 12, 2026233.98229.41229.41238.242291.46M
October 09, 2026220.62225.71225.71227.2219.23814,919
October 08, 2026220.15218.43218.43223.09215.731.34M
October 07, 2026222.93222.15222.15228221.41.3M
October 06, 2026224.53222.89222.89225.972181.01M
October 05, 2026219.9223.59223.59223.85218.22936,864
October 02, 2026222.98219.88219.88224.08219.81774,015
October 01, 2026225.5222.82222.82228.31222.51.75M
September 30, 2026227.23225.88225.88229.36225.511.55M
September 29, 2026227.02227.07227.07229.41224.451.1M
September 28, 2026225.87228.69228.69230.49225.511.31M
September 25, 2026228.27227.6227.6228.92223.76939,196
September 24, 2026226.8226.36226.36228.72224.311.02M
September 23, 2026226.94227.53227.53229.19222.361.39M
September 22, 2026219.22225.36225.36226.432191.11M
September 21, 2026216.14219.07219.07221.92214.59928,545
September 18, 2026219.05215.5215.5220.17215.262.63M
September 17, 2026217.68219.05219.05219.41215.33836,656
September 16, 2026216.41216.01216.01218.29214.81605,882
September 15, 2026216.71216.17216.17216.71213.54755,785
September 11, 2026216.75217.15217.15219.76214.711.08M
September 10, 2026209.92215.43215.43216.7208.93928,007
September 09, 2026210.5210.73210.73213.48209693,725
September 08, 2026215.45212.5212.5217.28210.54617,404
September 04, 2026221.15220.83220.83223.82219.82464,803
September 03, 2026225.44224.51224.51225.8221.23549,658
September 02, 2026218.2222.67222.67225.59216.971.27M
September 01, 2026218.11216.04216.04219.3213.6742,042
August 31, 2026216.47216.65216.65218.89213.58807,693
August 28, 2026221.17218.5218.5222216.78516,658
August 27, 2026219.39221.5221.5222.11217.53489,135
August 26, 2026219.34221.07221.07222218.69639,457
August 25, 2026218.93220.77220.77222.85218495,313
August 24, 2026216.4218.12218.12218.5213.96587,358
August 21, 2026217.76216.78216.78219.12215722,317
August 20, 2026217.98214.35214.35221.29214.16808,370
August 19, 2026215.33221.56221.56222.15215.08880,796
August 18, 2026211212.55212.55214.07210.01693,967
August 17, 2026208.36209.15209.15210.49207.62617,099
August 14, 2026210.01209.83209.83210.79208.22554,423
August 13, 2026212.98210.65210.65215.61208.79860,069
August 12, 2026203.52208.87208.87209.22201786,185
August 11, 2026206.63203.89203.89207.57203.53936,443
August 10, 2026206.7207.13207.13210.02206.29692,820
August 07, 2026207.38207.94207.94208.31204.16814,472
August 06, 2026208.75206.28206.28209.03202.03887,393
August 05, 2026210.6206.63206.63212.18205.8873,635
August 04, 2026200.96208.45208.45209.74199.931.2M
August 03, 2026203.34201.82201.82203.85199.58940,856
July 31, 2026207.51202.95202.95208.05202.571.06M
July 30, 2026204.38207.93207.93210.19203.09885,493
July 29, 2026210.5209.23209.23218.59206.272.4M
July 28, 2026201.01205.61205.61207.72199.41.82M
July 27, 2026202.75200.14200.14204.47199.83761,829
July 23, 2026197.04200.62200.62203.6196.921.02M
July 22, 2026203.7197.74197.74204.31197.4840,660
July 21, 2026199.47203.16203.16203.7198.59652,830
July 20, 2026204.08199.95199.95205.65199.62961,522
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