Biogen Inc. (BIIB)
NASDAQ: BIIB · Real-Time Price · USD
168.18
+0.25 (0.15%)
At close: Nov 20, 2025, 4:00 PM EST
169.79
+1.61 (0.96%)
Pre-market: Nov 21, 2025, 8:26 AM EST
Biogen Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Nov 20, 2025 | 168.15 | 170.91 | 165.75 | 168.18 | 168.18 | 0.15% | 1,912,874 |
| Nov 19, 2025 | 168.83 | 168.90 | 165.79 | 167.93 | 167.93 | -0.53% | 1,765,993 |
| Nov 18, 2025 | 164.40 | 170.78 | 163.00 | 168.83 | 168.83 | 2.52% | 2,257,470 |
| Nov 17, 2025 | 167.00 | 167.97 | 163.50 | 164.68 | 164.68 | -1.71% | 2,245,006 |
| Nov 14, 2025 | 164.72 | 169.00 | 163.00 | 167.55 | 167.55 | 1.71% | 2,620,813 |
| Nov 13, 2025 | 161.57 | 167.87 | 161.20 | 164.73 | 164.73 | 2.01% | 2,993,001 |
| Nov 12, 2025 | 160.00 | 162.56 | 158.05 | 161.48 | 161.48 | 1.20% | 1,659,866 |
| Nov 11, 2025 | 156.76 | 159.95 | 154.20 | 159.56 | 159.56 | 2.11% | 1,504,613 |
| Nov 10, 2025 | 155.41 | 156.55 | 153.77 | 156.26 | 156.26 | 0.48% | 1,258,595 |
| Nov 7, 2025 | 156.70 | 156.70 | 151.83 | 155.51 | 155.51 | -0.78% | 1,552,011 |
| Nov 6, 2025 | 155.76 | 157.80 | 153.76 | 156.74 | 156.74 | 2.16% | 1,848,716 |
| Nov 5, 2025 | 149.66 | 153.68 | 148.51 | 153.43 | 153.43 | 2.75% | 1,806,070 |
| Nov 4, 2025 | 150.89 | 152.90 | 149.05 | 149.33 | 149.33 | -1.39% | 2,029,011 |
| Nov 3, 2025 | 153.60 | 155.33 | 149.63 | 151.44 | 151.44 | -1.83% | 2,197,357 |
| Oct 31, 2025 | 147.99 | 155.18 | 146.52 | 154.27 | 154.27 | 3.11% | 2,235,290 |
| Oct 30, 2025 | 140.10 | 154.44 | 138.00 | 149.61 | 149.61 | 1.18% | 2,745,188 |
| Oct 29, 2025 | 148.82 | 149.91 | 147.54 | 147.86 | 147.86 | -0.85% | 2,450,701 |
| Oct 28, 2025 | 150.01 | 150.30 | 148.37 | 149.13 | 149.13 | -0.86% | 1,662,855 |
| Oct 27, 2025 | 150.07 | 150.92 | 148.10 | 150.43 | 150.43 | 0.36% | 1,214,395 |
| Oct 24, 2025 | 151.09 | 151.92 | 148.98 | 149.89 | 149.89 | -0.13% | 1,338,315 |
| Oct 23, 2025 | 148.99 | 150.29 | 147.57 | 150.08 | 150.08 | 1.60% | 1,245,964 |
| Oct 22, 2025 | 147.37 | 149.12 | 146.25 | 147.72 | 147.72 | 1.03% | 1,403,299 |
| Oct 21, 2025 | 146.09 | 147.89 | 144.29 | 146.22 | 146.22 | -0.28% | 895,048 |
| Oct 20, 2025 | 143.31 | 147.47 | 142.41 | 146.63 | 146.63 | 2.54% | 1,316,452 |
| Oct 17, 2025 | 142.10 | 144.33 | 141.67 | 143.00 | 143.00 | 0.52% | 1,010,007 |
| Oct 16, 2025 | 144.05 | 147.48 | 141.70 | 142.26 | 142.26 | -0.97% | 1,469,099 |
| Oct 15, 2025 | 144.74 | 145.19 | 142.29 | 143.66 | 143.66 | -1.14% | 1,337,176 |
| Oct 14, 2025 | 144.09 | 146.88 | 142.20 | 145.31 | 145.31 | 0.43% | 1,283,553 |
| Oct 13, 2025 | 146.47 | 147.56 | 144.65 | 144.69 | 144.69 | -1.28% | 1,124,466 |
| Oct 10, 2025 | 150.00 | 150.20 | 144.74 | 146.57 | 146.57 | -2.03% | 1,724,990 |
| Oct 9, 2025 | 151.37 | 152.15 | 148.17 | 149.61 | 149.61 | -0.90% | 1,600,465 |
| Oct 8, 2025 | 152.36 | 152.36 | 149.64 | 150.97 | 150.97 | -0.81% | 1,333,277 |
| Oct 7, 2025 | 154.52 | 154.58 | 151.97 | 152.21 | 152.21 | -1.19% | 1,372,833 |
| Oct 6, 2025 | 159.61 | 159.70 | 153.10 | 154.05 | 154.05 | -3.65% | 1,817,888 |
| Oct 3, 2025 | 156.46 | 160.20 | 155.97 | 159.88 | 159.88 | 2.98% | 2,878,796 |
| Oct 2, 2025 | 154.00 | 157.85 | 152.22 | 155.25 | 155.25 | 0.67% | 2,882,551 |
| Oct 1, 2025 | 140.82 | 154.44 | 140.70 | 154.22 | 154.22 | 10.09% | 4,059,913 |
| Sep 30, 2025 | 138.46 | 141.04 | 136.94 | 140.08 | 140.08 | 1.13% | 1,369,066 |
| Sep 29, 2025 | 137.49 | 138.80 | 135.39 | 138.52 | 138.52 | 0.84% | 1,285,534 |
| Sep 26, 2025 | 136.79 | 138.00 | 135.81 | 137.37 | 137.37 | 1.25% | 1,677,223 |
| Sep 25, 2025 | 138.40 | 140.68 | 135.41 | 135.67 | 135.67 | -1.45% | 1,260,311 |
| Sep 24, 2025 | 138.52 | 139.28 | 136.20 | 137.67 | 137.67 | -1.18% | 1,309,389 |
| Sep 23, 2025 | 140.27 | 141.38 | 138.73 | 139.31 | 139.31 | -0.96% | 1,103,063 |
| Sep 22, 2025 | 142.12 | 142.64 | 140.02 | 140.66 | 140.66 | -1.29% | 1,446,078 |
| Sep 19, 2025 | 143.96 | 144.43 | 141.49 | 142.50 | 142.50 | -0.91% | 3,748,754 |
| Sep 18, 2025 | 146.30 | 146.45 | 143.37 | 143.81 | 143.81 | -0.73% | 1,514,476 |
| Sep 17, 2025 | 143.48 | 146.68 | 143.39 | 144.87 | 144.87 | 0.83% | 1,502,045 |
| Sep 16, 2025 | 143.51 | 147.23 | 143.02 | 143.68 | 143.68 | 0.25% | 1,936,056 |
| Sep 15, 2025 | 144.82 | 145.99 | 141.12 | 143.32 | 143.32 | -1.06% | 1,432,587 |
| Sep 12, 2025 | 148.08 | 150.28 | 144.84 | 144.86 | 144.86 | -2.67% | 1,810,892 |