Biogen Inc. (BIIB)
NASDAQ: BIIB · Real-Time Price · USD
194.13
-1.49 (-0.76%)
At close: Feb 18, 2026, 4:00 PM EST
193.60
-0.53 (-0.27%)
After-hours: Feb 18, 2026, 5:38 PM EST
Biogen Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Feb 18, 2026 | 195.32 | 195.68 | 193.11 | 194.13 | 194.13 | -0.76% | 1,048,914 |
| Feb 17, 2026 | 197.46 | 200.29 | 193.37 | 195.62 | 195.62 | -0.46% | 968,512 |
| Feb 13, 2026 | 196.27 | 199.50 | 195.52 | 196.52 | 196.52 | 0.52% | 1,352,184 |
| Feb 12, 2026 | 190.15 | 196.00 | 189.00 | 195.50 | 195.50 | 2.25% | 1,655,827 |
| Feb 11, 2026 | 188.35 | 192.00 | 187.20 | 191.20 | 191.20 | 1.17% | 996,829 |
| Feb 10, 2026 | 194.07 | 195.72 | 188.74 | 188.99 | 188.99 | -2.49% | 1,835,626 |
| Feb 9, 2026 | 199.83 | 201.00 | 191.88 | 193.81 | 193.81 | -3.66% | 2,009,320 |
| Feb 6, 2026 | 187.01 | 202.41 | 184.60 | 201.18 | 201.18 | 8.53% | 3,404,036 |
| Feb 5, 2026 | 184.87 | 187.73 | 184.54 | 185.36 | 185.36 | -0.05% | 2,526,078 |
| Feb 4, 2026 | 177.25 | 186.24 | 177.10 | 185.45 | 185.45 | 4.92% | 2,035,580 |
| Feb 3, 2026 | 177.79 | 182.67 | 176.19 | 176.76 | 176.76 | -1.30% | 1,547,031 |
| Feb 2, 2026 | 179.30 | 180.76 | 177.58 | 179.09 | 179.09 | -0.44% | 1,288,700 |
| Jan 30, 2026 | 177.09 | 180.14 | 175.96 | 179.89 | 179.89 | 2.11% | 1,487,364 |
| Jan 29, 2026 | 174.88 | 177.20 | 173.51 | 176.18 | 176.18 | 0.77% | 1,146,703 |
| Jan 28, 2026 | 173.63 | 175.06 | 170.85 | 174.83 | 174.83 | 0.41% | 1,304,662 |
| Jan 27, 2026 | 173.02 | 176.14 | 172.23 | 174.12 | 174.12 | 0.58% | 748,078 |
| Jan 26, 2026 | 171.67 | 174.31 | 170.59 | 173.12 | 173.12 | 0.89% | 1,049,188 |
| Jan 23, 2026 | 173.17 | 173.90 | 170.04 | 171.59 | 171.59 | -1.27% | 1,250,463 |
| Jan 22, 2026 | 171.78 | 175.29 | 171.65 | 173.80 | 173.80 | 0.68% | 996,425 |
| Jan 21, 2026 | 165.31 | 172.87 | 165.31 | 172.62 | 172.62 | 4.38% | 1,447,089 |
| Jan 20, 2026 | 161.51 | 165.61 | 160.37 | 165.38 | 165.38 | 0.58% | 1,879,947 |
| Jan 16, 2026 | 168.87 | 169.34 | 163.74 | 164.42 | 164.42 | -2.46% | 1,816,538 |
| Jan 15, 2026 | 169.03 | 169.79 | 166.79 | 168.57 | 168.57 | -0.44% | 1,562,727 |
| Jan 14, 2026 | 177.73 | 178.41 | 165.58 | 169.31 | 169.31 | -5.04% | 3,635,883 |
| Jan 13, 2026 | 185.42 | 186.32 | 177.05 | 178.30 | 178.30 | -3.95% | 1,597,380 |
| Jan 12, 2026 | 188.00 | 188.00 | 182.73 | 185.63 | 185.63 | -1.06% | 1,280,360 |
| Jan 9, 2026 | 186.74 | 190.20 | 186.49 | 187.62 | 187.62 | 0.87% | 1,416,702 |
| Jan 8, 2026 | 187.02 | 187.77 | 183.50 | 186.00 | 186.00 | -0.49% | 1,622,749 |
| Jan 7, 2026 | 181.70 | 187.06 | 181.70 | 186.91 | 186.91 | 2.35% | 2,122,447 |
| Jan 6, 2026 | 174.94 | 182.97 | 174.30 | 182.61 | 182.61 | 4.57% | 2,115,650 |
| Jan 5, 2026 | 175.73 | 180.56 | 171.61 | 174.63 | 174.63 | -1.79% | 1,663,631 |
| Jan 2, 2026 | 175.37 | 178.24 | 174.28 | 177.82 | 177.82 | 1.04% | 1,095,744 |
| Dec 31, 2025 | 175.76 | 177.19 | 175.02 | 175.99 | 175.99 | -0.23% | 890,441 |
| Dec 30, 2025 | 176.30 | 176.99 | 175.72 | 176.40 | 176.40 | -0.24% | 609,867 |
| Dec 29, 2025 | 177.00 | 178.46 | 176.31 | 176.83 | 176.83 | -0.14% | 928,193 |
| Dec 26, 2025 | 175.30 | 177.19 | 175.00 | 177.08 | 177.08 | 0.43% | 687,403 |
| Dec 24, 2025 | 175.73 | 177.18 | 175.37 | 176.33 | 176.33 | 0.86% | 434,748 |
| Dec 23, 2025 | 174.26 | 175.58 | 173.08 | 174.82 | 174.82 | 0.07% | 1,281,705 |
| Dec 22, 2025 | 174.78 | 177.29 | 172.90 | 174.70 | 174.70 | -0.06% | 1,909,529 |
| Dec 19, 2025 | 171.32 | 176.42 | 170.00 | 174.80 | 174.80 | 2.88% | 14,994,759 |
| Dec 18, 2025 | 171.59 | 173.00 | 168.56 | 169.91 | 169.91 | -1.27% | 2,761,018 |
| Dec 17, 2025 | 171.43 | 173.83 | 169.55 | 172.10 | 172.10 | 0.35% | 2,783,560 |
| Dec 16, 2025 | 174.51 | 174.51 | 169.52 | 171.50 | 171.50 | -2.41% | 2,408,490 |
| Dec 15, 2025 | 173.67 | 175.94 | 170.45 | 175.74 | 175.74 | 0.94% | 2,291,589 |
| Dec 12, 2025 | 173.49 | 175.08 | 171.27 | 174.10 | 174.10 | 0.93% | 1,781,471 |
| Dec 11, 2025 | 177.47 | 180.79 | 172.00 | 172.50 | 172.50 | -2.84% | 2,721,790 |
| Dec 10, 2025 | 173.30 | 178.17 | 169.24 | 177.55 | 177.55 | 0.97% | 2,147,901 |
| Dec 9, 2025 | 179.91 | 181.99 | 175.39 | 175.84 | 175.84 | -2.55% | 1,506,685 |
| Dec 8, 2025 | 181.30 | 182.12 | 179.21 | 180.44 | 180.44 | -0.47% | 1,474,568 |
| Dec 5, 2025 | 181.96 | 183.15 | 181.10 | 181.30 | 181.30 | -0.37% | 1,209,961 |