Biogen Inc.
BIIB | NASDAQ
$219.07
+$3.57 (+1.66%)
At close: Sep 21, 2026, 4:00 PM ET
$221.33
+$2.26 (+1.03%)
Pre-market:
Sep 22, 2026, 5:52 AM ET
Market Cap History History
Annual Market Cap Change Annual Change
| Date | Market Cap | Change | % Change |
|---|---|---|---|
| Sep 20, 2026 | $32.36B | $6.4B | +24.64% |
| Dec 25, 2025 | $25.96B | $3.91B | +17.75% |
| Dec 26, 2024 | $22.05B | -$15.42B | -41.16% |
| Dec 28, 2023 | $37.47B | -$2.52B | -6.30% |
| Dec 29, 2022 | $39.99B | $4.74B | +13.46% |
| Dec 30, 2021 | $35.24B | -$2.39B | -6.35% |
| Dec 30, 2020 | $37.63B | -$17.58B | -31.84% |
| Dec 26, 2019 | $55.22B | -$3.9B | -6.59% |
| Dec 27, 2018 | $59.11B | -$8.23B | -12.22% |
| Dec 28, 2017 | $67.35B | $5.27B | +8.49% |
| Dec 29, 2016 | $62.08B | -$5.44B | -8.06% |
| Dec 30, 2015 | $67.52B | -$13.36B | -16.52% |
| Dec 25, 2014 | $80.88B | $15.17B | +23.09% |
| Dec 26, 2013 | $65.71B | $31.17B | +90.26% |
| Dec 27, 2012 | $34.54B | $7.81B | +29.21% |
| Dec 29, 2011 | $26.73B | $10.53B | +65.05% |
| Dec 30, 2010 | $16.19B | $1.75B | +12.15% |
| Dec 30, 2009 | $14.44B | $654.31M | +4.75% |
| Dec 25, 2008 | $13.79B | -$2.93B | -17.51% |
| Dec 27, 2007 | $16.71B | $86.08M | +0.52% |
| Dec 28, 2006 | $16.63B | n/a | n/a |
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