If you invested $1000 in Biogen Inc. (BIIB) 10 years ago, it would be worth $873.28 as of July 06, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $626.63, while $1000 invested 1 year ago would be worth $1,660.8. This corresponds to total returns of -12.67%, -37.34%, 66.08%, respectively, with annualized returns of -1.35%, -8.92%, 66.08%.
Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.
Date Range:
| Date | Open | Close | Adj Close | High | Low | Volume |
|---|---|---|---|---|---|---|
| July 02, 2026 | 212.74 | 216.12 | 216.12 | 219.02 | 210.75 | 1.15M |
| July 01, 2026 | 215.25 | 209.74 | 209.74 | 215.81 | 209.67 | 1.14M |
| June 30, 2026 | 218 | 216.06 | 216.06 | 218 | 212.58 | 1.04M |
| June 29, 2026 | 215.74 | 216.63 | 216.63 | 219.72 | 214.08 | 1.24M |
| June 26, 2026 | 202.53 | 216.03 | 216.03 | 218.06 | 202.29 | 2.36M |
| June 25, 2026 | 201.63 | 201.96 | 201.96 | 206.67 | 200.2 | 1.28M |
| June 24, 2026 | 199.34 | 199.59 | 199.59 | 202.06 | 198.66 | 1.28M |
| June 23, 2026 | 198.88 | 197.19 | 197.19 | 201.22 | 197.01 | 992,373 |
| June 22, 2026 | 199.48 | 199.71 | 199.71 | 200.98 | 194.74 | 1.67M |
| June 18, 2026 | 200.22 | 196.58 | 196.58 | 200.99 | 193.2 | 1.72M |
| June 17, 2026 | 195.14 | 198.67 | 198.67 | 201.75 | 194.04 | 1M |
| June 16, 2026 | 199.69 | 195.61 | 195.61 | 200.26 | 194.04 | 906,696 |
| June 15, 2026 | 198.37 | 198.64 | 198.64 | 199.37 | 195.89 | 877,518 |
| June 12, 2026 | 200.57 | 200.05 | 200.05 | 203.45 | 199.06 | 837,285 |
| June 11, 2026 | 195.49 | 199.96 | 199.96 | 201.18 | 194.24 | 909,629 |
| June 10, 2026 | 200.21 | 194.24 | 194.24 | 201.94 | 194.1 | 1.07M |
| June 09, 2026 | 195.51 | 199.1 | 199.1 | 199.63 | 193.45 | 922,061 |
| June 08, 2026 | 197.25 | 192.62 | 192.62 | 198.7 | 192.18 | 1.11M |
| June 05, 2026 | 196.45 | 195.34 | 195.34 | 200.66 | 195.14 | 880,127 |
| June 04, 2026 | 198 | 196.45 | 196.45 | 199.9 | 196.35 | 718,925 |
| June 03, 2026 | 187.69 | 195.96 | 195.96 | 196.36 | 187.48 | 876,834 |
| June 02, 2026 | 190.09 | 188.83 | 188.83 | 190.58 | 184.9 | 964,377 |
| June 01, 2026 | 194.5 | 192.23 | 192.23 | 195.28 | 191.67 | 841,494 |
| May 29, 2026 | 195.55 | 196 | 196 | 198.46 | 195.11 | 1.86M |
| May 28, 2026 | 196.97 | 196.39 | 196.39 | 198 | 194.5 | 555,954 |
| May 27, 2026 | 194.11 | 196.97 | 196.97 | 199.8 | 194.11 | 893,034 |
| May 26, 2026 | 194.3 | 193.08 | 193.08 | 195.5 | 192.27 | 930,137 |
| May 22, 2026 | 190.53 | 193.76 | 193.76 | 194.75 | 190.01 | 892,907 |
| May 21, 2026 | 187.4 | 189.47 | 189.47 | 190.27 | 185.85 | 1.47M |
| May 20, 2026 | 191.41 | 187.8 | 187.8 | 193.38 | 186.37 | 919,583 |
| May 19, 2026 | 191.72 | 190.56 | 190.56 | 193.03 | 188.64 | 1.05M |
| May 18, 2026 | 191.25 | 191.91 | 191.91 | 193.37 | 189.19 | 1.05M |
| May 15, 2026 | 191.83 | 192.95 | 192.95 | 194.89 | 190.66 | 1.25M |
| May 14, 2026 | 200.25 | 191.37 | 191.37 | 205 | 189.49 | 2.81M |
| May 13, 2026 | 199.33 | 204.53 | 204.53 | 205.97 | 198.9 | 1.23M |
| May 12, 2026 | 198.47 | 199.36 | 199.36 | 202.4 | 196.47 | 1.15M |
| May 11, 2026 | 194.76 | 197.95 | 197.95 | 200.31 | 194.75 | 1.57M |
| May 08, 2026 | 189.68 | 193.45 | 193.45 | 195.2 | 189.5 | 862,815 |
| May 07, 2026 | 190.34 | 191.38 | 191.38 | 192.1 | 188.86 | 733,398 |
| May 06, 2026 | 189.13 | 190.68 | 190.68 | 191.17 | 188.3 | 740,794 |
| May 05, 2026 | 187.38 | 189.13 | 189.13 | 189.69 | 186 | 463,610 |
| May 04, 2026 | 186.28 | 187.21 | 187.21 | 187.51 | 185.44 | 626,557 |
| May 01, 2026 | 189.28 | 187.06 | 187.06 | 190.57 | 186.17 | 680,856 |
| April 30, 2026 | 194.02 | 189.28 | 189.28 | 195.98 | 187.16 | 1.53M |
| April 29, 2026 | 183.12 | 194.38 | 194.38 | 195.89 | 180.18 | 2.45M |
| April 28, 2026 | 182.45 | 183.38 | 183.38 | 184.41 | 181.89 | 1.24M |
| April 27, 2026 | 183.16 | 180.67 | 180.67 | 186.15 | 179.15 | 1.1M |
| April 24, 2026 | 186.65 | 184.38 | 184.38 | 186.65 | 183.17 | 722,998 |
| April 23, 2026 | 189.46 | 187.88 | 187.88 | 190.32 | 187.01 | 816,060 |
| April 22, 2026 | 189.31 | 190.07 | 190.07 | 192.75 | 188.67 | 1.33M |
| April 21, 2026 | 184.52 | 185.95 | 185.95 | 187.74 | 181.75 | 1.06M |
| April 20, 2026 | 179.54 | 183.34 | 183.34 | 184.26 | 178.72 | 1.48M |
| April 17, 2026 | 176.29 | 177.35 | 177.35 | 178.41 | 175.69 | 1.24M |
| April 16, 2026 | 178.82 | 176.02 | 176.02 | 179.99 | 174.85 | 937,563 |
| April 15, 2026 | 179.36 | 180.54 | 180.54 | 180.87 | 177.7 | 1.15M |
| April 14, 2026 | 177.71 | 178.96 | 178.96 | 181.77 | 177.45 | 1.55M |
| April 13, 2026 | 172.62 | 176.37 | 176.37 | 176.79 | 171.22 | 1.41M |
| April 10, 2026 | 177.97 | 172.97 | 172.97 | 177.97 | 172.32 | 1.5M |
| April 09, 2026 | 177.81 | 177.11 | 177.11 | 180.06 | 174.97 | 1.27M |
| April 08, 2026 | 178.24 | 179.9 | 179.9 | 180.24 | 176.35 | 1.29M |