Biogen Inc. historical data
| Date | Open | High | Low | Close | Adj. close | Volume |
|---|---|---|---|---|---|---|
| 2025-10-31 | 147.99 | 155.18 | 146.52 | 154.27 | 154.27 | 2,235,300 |
| 2025-10-30 | 140.10 | 154.44 | 138.00 | 149.61 | 149.61 | 2,745,200 |
| 2025-10-29 | 148.82 | 149.91 | 147.54 | 147.86 | 147.86 | 2,450,700 |
| 2025-10-28 | 150.01 | 150.30 | 148.37 | 149.13 | 149.13 | 1,662,800 |
| 2025-10-27 | 150.07 | 150.92 | 148.10 | 150.43 | 150.43 | 1,214,300 |
| 2025-10-24 | 151.09 | 151.92 | 148.98 | 149.89 | 149.89 | 1,338,300 |
| 2025-10-23 | 148.99 | 150.29 | 147.57 | 150.08 | 150.08 | 1,246,000 |
| 2025-10-22 | 147.37 | 149.12 | 146.25 | 147.72 | 147.72 | 1,403,100 |
| 2025-10-21 | 146.09 | 147.89 | 144.29 | 146.22 | 146.22 | 895,000 |
| 2025-10-20 | 143.31 | 147.47 | 142.41 | 146.63 | 146.63 | 1,316,200 |
| 2025-10-17 | 142.10 | 144.32 | 141.67 | 143.00 | 143.00 | 1,010,000 |
| 2025-10-16 | 144.05 | 147.48 | 141.70 | 142.26 | 142.26 | 1,469,100 |
| 2025-10-15 | 144.74 | 145.19 | 142.29 | 143.66 | 143.66 | 1,337,200 |
| 2025-10-14 | 144.09 | 146.88 | 142.20 | 145.31 | 145.31 | 1,283,400 |
| 2025-10-13 | 146.47 | 147.56 | 144.65 | 144.69 | 144.69 | 1,124,300 |
| 2025-10-10 | 150.00 | 150.20 | 144.74 | 146.57 | 146.57 | 1,725,000 |
| 2025-10-09 | 151.37 | 152.15 | 148.17 | 149.61 | 149.61 | 1,600,400 |
| 2025-10-08 | 152.36 | 152.36 | 149.64 | 150.97 | 150.97 | 1,333,300 |
| 2025-10-07 | 154.52 | 154.57 | 151.97 | 152.21 | 152.21 | 1,372,500 |
| 2025-10-06 | 159.60 | 159.70 | 153.10 | 154.05 | 154.05 | 1,817,900 |
| 2025-10-03 | 156.46 | 160.20 | 155.97 | 159.88 | 159.88 | 2,878,800 |
| 2025-10-02 | 154.00 | 157.85 | 152.22 | 155.25 | 155.25 | 2,882,300 |
| 2025-10-01 | 140.82 | 154.44 | 140.70 | 154.22 | 154.22 | 4,059,900 |
| 2025-09-30 | 138.46 | 141.04 | 136.94 | 140.08 | 140.08 | 1,368,900 |
| 2025-09-29 | 137.49 | 138.80 | 135.39 | 138.52 | 138.52 | 1,285,500 |
| 2025-09-26 | 136.79 | 138.00 | 135.81 | 137.37 | 137.37 | 1,677,100 |
| 2025-09-25 | 138.40 | 140.67 | 135.41 | 135.67 | 135.67 | 1,260,300 |
| 2025-09-24 | 138.52 | 139.28 | 136.20 | 137.67 | 137.67 | 1,309,100 |
| 2025-09-23 | 140.27 | 141.38 | 138.73 | 139.31 | 139.31 | 1,102,800 |
| 2025-09-22 | 142.12 | 142.64 | 140.02 | 140.66 | 140.66 | 1,445,800 |
| 2025-09-19 | 143.96 | 144.43 | 141.49 | 142.50 | 142.50 | 3,748,500 |
| 2025-09-18 | 146.30 | 146.45 | 143.37 | 143.81 | 143.81 | 1,514,400 |
| 2025-09-17 | 143.48 | 146.68 | 143.39 | 144.87 | 144.87 | 1,501,900 |
| 2025-09-16 | 143.51 | 147.23 | 143.02 | 143.68 | 143.68 | 1,935,800 |
| 2025-09-15 | 144.82 | 145.99 | 141.12 | 143.32 | 143.32 | 1,432,300 |
| 2025-09-12 | 148.08 | 150.28 | 144.84 | 144.86 | 144.86 | 1,810,700 |
| 2025-09-11 | 143.47 | 149.07 | 142.86 | 148.84 | 148.84 | 1,714,600 |
| 2025-09-10 | 143.00 | 143.45 | 139.54 | 142.61 | 142.61 | 1,278,800 |
| 2025-09-09 | 141.16 | 143.74 | 140.51 | 143.60 | 143.60 | 1,490,700 |
| 2025-09-08 | 140.00 | 143.23 | 137.20 | 141.35 | 141.35 | 1,624,300 |
| 2025-09-05 | 140.13 | 144.20 | 139.96 | 140.67 | 140.67 | 1,561,800 |
| 2025-09-04 | 141.78 | 142.28 | 137.14 | 139.94 | 139.94 | 1,529,000 |
| 2025-09-03 | 139.56 | 145.27 | 139.56 | 141.62 | 141.62 | 2,279,400 |
| 2025-09-02 | 133.55 | 140.06 | 133.53 | 139.63 | 139.63 | 2,466,900 |
| 2025-08-29 | 132.50 | 133.48 | 131.52 | 132.22 | 132.22 | 1,083,000 |
| 2025-08-28 | 136.36 | 136.36 | 132.04 | 132.65 | 132.65 | 1,557,800 |
| 2025-08-27 | 136.00 | 138.50 | 135.79 | 136.36 | 136.36 | 1,403,100 |
| 2025-08-26 | 135.85 | 136.91 | 135.22 | 136.72 | 136.72 | 1,579,900 |
| 2025-08-25 | 139.01 | 139.75 | 136.14 | 136.36 | 136.36 | 861,800 |
| 2025-08-22 | 140.41 | 142.32 | 138.65 | 139.31 | 139.31 | 1,198,900 |
| 2025-08-21 | 138.26 | 140.20 | 137.59 | 139.12 | 139.12 | 1,074,100 |
| 2025-08-20 | 139.10 | 140.50 | 137.77 | 138.99 | 138.99 | 1,286,300 |
| 2025-08-19 | 136.37 | 139.58 | 136.02 | 138.86 | 138.86 | 1,447,800 |
| 2025-08-18 | 140.00 | 141.18 | 135.74 | 135.91 | 135.91 | 1,813,900 |
| 2025-08-15 | 136.16 | 138.83 | 135.88 | 138.60 | 138.60 | 1,643,800 |
| 2025-08-14 | 134.51 | 135.23 | 132.16 | 134.94 | 134.94 | 1,169,800 |
| 2025-08-13 | 129.62 | 135.38 | 129.40 | 135.19 | 135.19 | 1,549,000 |
| 2025-08-12 | 128.47 | 131.10 | 128.25 | 128.93 | 128.93 | 1,127,600 |
| 2025-08-11 | 131.16 | 133.73 | 127.71 | 128.00 | 128.00 | 1,070,300 |
| 2025-08-08 | 127.50 | 131.26 | 127.00 | 130.67 | 130.67 | 1,327,700 |
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.