Biogen Inc. historical data
| Date | Open | High | Low | Close | Adj. close | Volume |
|---|---|---|---|---|---|---|
| 2026-10-16 | 235.75 | 236.87 | 232.36 | 232.65 | 232.65 | 1,462,600 |
| 2026-10-15 | 236.46 | 240.99 | 235.22 | 235.35 | 235.35 | 1,572,400 |
| 2026-10-14 | 228.99 | 234.20 | 228.00 | 232.83 | 232.83 | 1,947,100 |
| 2026-10-13 | 230.34 | 231.04 | 226.71 | 228.90 | 228.90 | 1,049,100 |
| 2026-10-12 | 233.98 | 238.24 | 229.00 | 229.41 | 229.41 | 1,461,700 |
| 2026-10-09 | 220.62 | 227.20 | 219.23 | 225.71 | 225.71 | 815,000 |
| 2026-10-08 | 220.15 | 223.09 | 215.73 | 218.43 | 218.43 | 1,339,000 |
| 2026-10-07 | 222.93 | 228.00 | 221.40 | 222.15 | 222.15 | 1,298,100 |
| 2026-10-06 | 224.53 | 225.97 | 218.00 | 222.89 | 222.89 | 1,008,100 |
| 2026-10-05 | 219.90 | 223.85 | 218.22 | 223.59 | 223.59 | 951,300 |
| 2026-10-02 | 222.98 | 224.08 | 219.81 | 219.88 | 219.88 | 779,900 |
| 2026-10-01 | 225.50 | 228.31 | 222.50 | 222.82 | 222.82 | 1,755,300 |
| 2026-09-30 | 227.23 | 229.36 | 225.51 | 225.88 | 225.88 | 1,553,300 |
| 2026-09-29 | 227.02 | 229.41 | 224.45 | 227.07 | 227.07 | 1,161,200 |
| 2026-09-28 | 225.87 | 230.49 | 225.51 | 228.69 | 228.69 | 1,332,300 |
| 2026-09-25 | 228.27 | 228.92 | 223.76 | 227.60 | 227.60 | 958,000 |
| 2026-09-24 | 226.80 | 228.72 | 224.31 | 226.36 | 226.36 | 1,034,600 |
| 2026-09-23 | 226.94 | 229.19 | 222.36 | 227.53 | 227.53 | 1,494,300 |
| 2026-09-22 | 219.22 | 226.43 | 219.00 | 225.36 | 225.36 | 1,111,700 |
| 2026-09-21 | 216.14 | 221.92 | 214.59 | 219.07 | 219.07 | 928,500 |
| 2026-09-18 | 219.05 | 220.17 | 215.26 | 215.50 | 215.50 | 2,634,700 |
| 2026-09-17 | 217.68 | 219.41 | 215.33 | 219.05 | 219.05 | 836,700 |
| 2026-09-16 | 216.41 | 218.29 | 214.81 | 216.01 | 216.01 | 606,500 |
| 2026-09-15 | 216.71 | 216.71 | 213.54 | 216.17 | 216.17 | 756,000 |
| 2026-09-14 | 221.00 | 222.25 | 215.56 | 217.36 | 217.36 | 629,900 |
| 2026-09-11 | 216.75 | 219.76 | 214.71 | 217.15 | 217.15 | 1,075,600 |
| 2026-09-10 | 209.92 | 216.70 | 208.93 | 215.43 | 215.43 | 936,600 |
| 2026-09-09 | 210.50 | 213.48 | 209.00 | 210.73 | 210.73 | 694,600 |
| 2026-09-08 | 215.45 | 217.28 | 210.54 | 212.50 | 212.50 | 617,600 |
| 2026-09-04 | 221.15 | 223.82 | 219.82 | 220.83 | 220.83 | 465,100 |
| 2026-09-03 | 225.44 | 225.80 | 221.23 | 224.51 | 224.51 | 550,700 |
| 2026-09-02 | 218.20 | 225.59 | 216.97 | 222.67 | 222.67 | 1,268,200 |
| 2026-09-01 | 218.11 | 219.30 | 213.60 | 216.04 | 216.04 | 785,500 |
| 2026-08-31 | 216.47 | 218.89 | 213.58 | 216.65 | 216.65 | 831,000 |
| 2026-08-28 | 221.17 | 222.00 | 216.78 | 218.50 | 218.50 | 517,400 |
| 2026-08-27 | 219.39 | 222.11 | 217.53 | 221.50 | 221.50 | 497,300 |
| 2026-08-26 | 219.34 | 222.00 | 218.69 | 221.07 | 221.07 | 647,200 |
| 2026-08-25 | 218.93 | 222.85 | 218.00 | 220.77 | 220.77 | 495,400 |
| 2026-08-24 | 216.40 | 218.50 | 213.96 | 218.12 | 218.12 | 649,800 |
| 2026-08-21 | 217.76 | 219.12 | 215.00 | 216.78 | 216.78 | 722,300 |
| 2026-08-20 | 217.98 | 221.29 | 214.16 | 214.35 | 214.35 | 808,600 |
| 2026-08-19 | 215.33 | 222.15 | 215.08 | 221.56 | 221.56 | 886,800 |
| 2026-08-18 | 211.00 | 214.07 | 210.01 | 212.55 | 212.55 | 694,000 |
| 2026-08-17 | 208.36 | 210.49 | 207.62 | 209.15 | 209.15 | 617,100 |
| 2026-08-14 | 210.01 | 210.79 | 208.22 | 209.83 | 209.83 | 554,400 |
| 2026-08-13 | 212.98 | 215.61 | 208.79 | 210.65 | 210.65 | 860,100 |
| 2026-08-12 | 203.52 | 209.22 | 201.00 | 208.87 | 208.87 | 789,000 |
| 2026-08-11 | 206.63 | 207.57 | 203.53 | 203.89 | 203.89 | 936,800 |
| 2026-08-10 | 206.70 | 210.02 | 206.29 | 207.13 | 207.13 | 706,400 |
| 2026-08-07 | 207.38 | 208.31 | 204.16 | 207.94 | 207.94 | 840,500 |
| 2026-08-06 | 208.75 | 209.03 | 202.03 | 206.28 | 206.28 | 892,600 |
| 2026-08-05 | 210.60 | 212.18 | 205.80 | 206.63 | 206.63 | 873,700 |
| 2026-08-04 | 200.96 | 209.74 | 199.93 | 208.45 | 208.45 | 1,205,400 |
| 2026-08-03 | 203.34 | 203.85 | 199.58 | 201.82 | 201.82 | 940,900 |
| 2026-07-31 | 207.51 | 208.05 | 202.57 | 202.95 | 202.95 | 1,062,000 |
| 2026-07-30 | 204.38 | 210.19 | 203.09 | 207.93 | 207.93 | 892,900 |
| 2026-07-29 | 210.50 | 218.59 | 206.27 | 209.23 | 209.23 | 2,400,100 |
| 2026-07-28 | 201.01 | 207.72 | 199.40 | 205.61 | 205.61 | 1,831,900 |
| 2026-07-27 | 202.75 | 204.47 | 199.83 | 200.14 | 200.14 | 762,600 |
| 2026-07-24 | 202.24 | 203.30 | 200.04 | 202.19 | 202.19 | 596,300 |
Page 1 of 2 · 64 trading daysOlder →
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.