Biogen Inc. historical data
| Date | Open | High | Low | Close | Adj. close | Volume |
|---|---|---|---|---|---|---|
| 2026-01-29 | 174.88 | 177.20 | 173.51 | 176.18 | 176.18 | 1,146,700 |
| 2026-01-28 | 173.63 | 175.06 | 170.85 | 174.83 | 174.83 | 1,304,500 |
| 2026-01-27 | 173.02 | 176.14 | 172.23 | 174.12 | 174.12 | 748,100 |
| 2026-01-26 | 171.67 | 174.31 | 170.59 | 173.12 | 173.12 | 1,049,200 |
| 2026-01-23 | 173.17 | 173.90 | 170.04 | 171.59 | 171.59 | 1,250,500 |
| 2026-01-22 | 171.78 | 175.29 | 171.65 | 173.80 | 173.80 | 996,400 |
| 2026-01-21 | 165.31 | 172.87 | 165.31 | 172.62 | 172.62 | 1,447,100 |
| 2026-01-20 | 161.51 | 165.61 | 160.36 | 165.38 | 165.38 | 1,879,900 |
| 2026-01-16 | 168.87 | 169.34 | 163.74 | 164.42 | 164.42 | 1,816,100 |
| 2026-01-15 | 169.03 | 169.79 | 166.79 | 168.57 | 168.57 | 1,562,600 |
| 2026-01-14 | 177.73 | 178.41 | 165.58 | 169.31 | 169.31 | 3,635,800 |
| 2026-01-13 | 185.42 | 186.32 | 177.05 | 178.30 | 178.30 | 1,597,400 |
| 2026-01-12 | 188.00 | 188.00 | 182.73 | 185.63 | 185.63 | 1,280,300 |
| 2026-01-09 | 186.74 | 190.20 | 186.49 | 187.62 | 187.62 | 1,416,700 |
| 2026-01-08 | 187.02 | 187.77 | 183.50 | 186.00 | 186.00 | 1,622,700 |
| 2026-01-07 | 181.70 | 187.06 | 181.70 | 186.91 | 186.91 | 2,122,400 |
| 2026-01-06 | 174.94 | 182.97 | 174.30 | 182.61 | 182.61 | 2,115,700 |
| 2026-01-05 | 175.73 | 180.56 | 171.61 | 174.63 | 174.63 | 1,663,600 |
| 2026-01-02 | 175.37 | 178.24 | 174.28 | 177.82 | 177.82 | 1,095,600 |
| 2025-12-31 | 175.76 | 177.19 | 175.02 | 175.99 | 175.99 | 890,400 |
| 2025-12-30 | 176.30 | 176.99 | 175.72 | 176.40 | 176.40 | 609,800 |
| 2025-12-29 | 177.00 | 178.46 | 176.31 | 176.83 | 176.83 | 928,100 |
| 2025-12-26 | 175.30 | 177.19 | 175.00 | 177.08 | 177.08 | 687,400 |
| 2025-12-24 | 175.73 | 177.18 | 175.37 | 176.33 | 176.33 | 434,700 |
| 2025-12-23 | 174.26 | 175.58 | 173.08 | 174.82 | 174.82 | 1,281,600 |
| 2025-12-22 | 174.78 | 177.29 | 172.90 | 174.70 | 174.70 | 1,909,500 |
| 2025-12-19 | 171.32 | 176.42 | 170.00 | 174.80 | 174.80 | 14,994,800 |
| 2025-12-18 | 171.59 | 173.00 | 168.56 | 169.91 | 169.91 | 2,761,000 |
| 2025-12-17 | 171.43 | 173.83 | 169.55 | 172.10 | 172.10 | 2,783,500 |
| 2025-12-16 | 174.51 | 174.51 | 169.52 | 171.50 | 171.50 | 2,408,300 |
| 2025-12-15 | 173.67 | 175.94 | 170.45 | 175.74 | 175.74 | 2,291,500 |
| 2025-12-12 | 173.49 | 175.08 | 171.27 | 174.10 | 174.10 | 1,781,500 |
| 2025-12-11 | 177.47 | 180.79 | 172.00 | 172.50 | 172.50 | 2,721,400 |
| 2025-12-10 | 173.30 | 178.17 | 169.24 | 177.55 | 177.55 | 2,147,900 |
| 2025-12-09 | 179.91 | 181.99 | 175.39 | 175.84 | 175.84 | 1,506,600 |
| 2025-12-08 | 181.30 | 182.12 | 179.21 | 180.44 | 180.44 | 1,474,200 |
| 2025-12-05 | 181.96 | 183.15 | 181.10 | 181.30 | 181.30 | 1,210,000 |
| 2025-12-04 | 181.86 | 182.69 | 179.27 | 181.98 | 181.98 | 1,246,300 |
| 2025-12-03 | 180.17 | 182.94 | 178.05 | 180.75 | 180.75 | 1,845,100 |
| 2025-12-02 | 177.32 | 180.55 | 174.53 | 180.18 | 180.18 | 1,866,300 |
| 2025-12-01 | 180.15 | 181.78 | 175.88 | 177.78 | 177.78 | 1,946,900 |
| 2025-11-28 | 182.07 | 182.74 | 180.69 | 182.09 | 182.09 | 566,400 |
| 2025-11-26 | 181.96 | 183.93 | 180.76 | 181.94 | 181.94 | 1,482,900 |
| 2025-11-25 | 177.07 | 182.97 | 176.09 | 181.96 | 181.96 | 2,344,500 |
| 2025-11-24 | 177.65 | 185.17 | 175.57 | 176.82 | 176.82 | 4,164,200 |
| 2025-11-21 | 168.54 | 176.02 | 167.42 | 175.30 | 175.30 | 2,268,000 |
| 2025-11-20 | 168.15 | 170.91 | 165.75 | 168.18 | 168.18 | 1,914,500 |
| 2025-11-19 | 168.83 | 168.90 | 165.79 | 167.93 | 167.93 | 1,766,000 |
| 2025-11-18 | 164.40 | 170.78 | 163.00 | 168.83 | 168.83 | 2,257,400 |
| 2025-11-17 | 167.00 | 167.97 | 163.50 | 164.68 | 164.68 | 2,244,600 |
| 2025-11-14 | 164.72 | 169.00 | 163.00 | 167.55 | 167.55 | 2,620,400 |
| 2025-11-13 | 161.57 | 167.87 | 161.20 | 164.73 | 164.73 | 2,993,000 |
| 2025-11-12 | 160.00 | 162.56 | 158.05 | 161.48 | 161.48 | 1,659,700 |
| 2025-11-11 | 156.76 | 159.95 | 154.20 | 159.56 | 159.56 | 1,504,500 |
| 2025-11-10 | 155.41 | 156.55 | 153.77 | 156.26 | 156.26 | 1,258,600 |
| 2025-11-07 | 156.70 | 156.70 | 151.83 | 155.51 | 155.51 | 1,552,000 |
| 2025-11-06 | 155.76 | 157.80 | 153.76 | 156.74 | 156.74 | 1,848,500 |
| 2025-11-05 | 149.66 | 153.68 | 148.51 | 153.43 | 153.43 | 1,806,000 |
| 2025-11-04 | 150.89 | 152.90 | 149.05 | 149.33 | 149.33 | 2,028,900 |
| 2025-11-03 | 153.60 | 155.33 | 149.63 | 151.44 | 151.44 | 2,197,200 |
Stock splits
| Date | Split (new : old) |
|---|---|
| 2001-01-18 | 3:1 |
| 1999-12-21 | 2:1 |
Dividends
No dividends on record.
Open, high, low and close are as traded (USD). Adjusted close accounts for splits and dividends. Educational only, not financial advice.