Biogen Inc. (BIIB)
NASDAQ: BIIB · Real-Time Price · USD
135.19
+6.26 (4.86%)
At close: Aug 13, 2025, 4:00 PM
135.24
+0.05 (0.04%)
After-hours: Aug 13, 2025, 7:57 PM EDT
Biogen Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Aug 13, 2025 | 129.62 | 135.38 | 129.40 | 135.19 | 135.19 | 4.86% | 1,521,590 |
| Aug 12, 2025 | 128.47 | 131.10 | 128.25 | 128.93 | 128.93 | 0.73% | 1,127,617 |
| Aug 11, 2025 | 131.16 | 133.73 | 127.71 | 128.00 | 128.00 | -2.04% | 1,070,293 |
| Aug 8, 2025 | 127.50 | 131.26 | 127.00 | 130.67 | 130.67 | 2.29% | 1,327,710 |
| Aug 7, 2025 | 130.02 | 130.68 | 127.65 | 127.75 | 127.75 | -1.23% | 1,718,239 |
| Aug 6, 2025 | 132.42 | 132.67 | 128.90 | 129.34 | 129.34 | -2.67% | 1,538,660 |
| Aug 5, 2025 | 131.91 | 134.16 | 131.57 | 132.89 | 132.89 | 0.52% | 1,395,619 |
| Aug 4, 2025 | 132.33 | 133.98 | 130.39 | 132.20 | 132.20 | 0.19% | 1,897,855 |
| Aug 1, 2025 | 128.96 | 132.90 | 124.56 | 131.95 | 131.95 | 3.09% | 2,798,550 |
| Jul 31, 2025 | 133.00 | 135.43 | 127.24 | 128.00 | 128.00 | 1.07% | 3,240,096 |
| Jul 30, 2025 | 128.56 | 129.78 | 125.97 | 126.64 | 126.64 | -0.99% | 1,892,068 |
| Jul 29, 2025 | 128.54 | 129.26 | 127.60 | 127.90 | 127.90 | -1.07% | 1,108,783 |
| Jul 28, 2025 | 131.35 | 131.85 | 128.43 | 129.28 | 129.28 | -1.70% | 1,045,656 |
| Jul 25, 2025 | 133.05 | 133.05 | 130.13 | 131.52 | 131.52 | -0.81% | 977,034 |
| Jul 24, 2025 | 130.78 | 132.65 | 130.00 | 132.59 | 132.59 | 1.23% | 1,280,623 |
| Jul 23, 2025 | 129.44 | 131.25 | 128.36 | 130.98 | 130.98 | 2.45% | 1,127,502 |
| Jul 22, 2025 | 123.38 | 127.94 | 123.38 | 127.85 | 127.85 | 4.21% | 1,319,120 |
| Jul 21, 2025 | 124.98 | 125.42 | 121.05 | 122.68 | 122.68 | -1.85% | 1,403,476 |
| Jul 18, 2025 | 129.37 | 129.58 | 124.68 | 124.99 | 124.99 | -2.88% | 1,524,966 |
| Jul 17, 2025 | 128.18 | 129.21 | 127.31 | 128.69 | 128.69 | 0.18% | 1,151,166 |
| Jul 16, 2025 | 128.50 | 129.51 | 127.42 | 128.46 | 128.46 | 0.75% | 1,234,689 |
| Jul 15, 2025 | 132.96 | 133.36 | 127.47 | 127.50 | 127.50 | -4.21% | 1,317,080 |
| Jul 14, 2025 | 133.56 | 134.21 | 132.40 | 133.11 | 133.11 | -0.82% | 694,370 |
| Jul 11, 2025 | 133.49 | 134.59 | 132.37 | 134.21 | 134.21 | -0.83% | 1,137,577 |
| Jul 10, 2025 | 133.45 | 137.19 | 132.77 | 135.33 | 135.33 | 1.74% | 992,049 |
| Jul 9, 2025 | 134.56 | 137.84 | 131.67 | 133.02 | 133.02 | -1.07% | 1,528,822 |
| Jul 8, 2025 | 130.32 | 135.58 | 130.32 | 134.46 | 134.46 | 3.33% | 1,350,819 |
| Jul 7, 2025 | 132.10 | 133.20 | 129.08 | 130.13 | 130.13 | -2.06% | 1,086,980 |
| Jul 3, 2025 | 133.49 | 134.42 | 132.21 | 132.87 | 132.87 | -0.24% | 633,328 |
| Jul 2, 2025 | 130.00 | 134.63 | 129.85 | 133.19 | 133.19 | 2.40% | 1,474,231 |
| Jul 1, 2025 | 124.94 | 134.75 | 124.94 | 130.07 | 130.07 | 3.57% | 1,919,845 |
| Jun 30, 2025 | 126.30 | 126.53 | 123.90 | 125.59 | 125.59 | -0.39% | 1,184,454 |
| Jun 27, 2025 | 127.20 | 128.25 | 125.60 | 126.08 | 126.08 | -0.66% | 1,100,003 |
| Jun 26, 2025 | 127.89 | 129.27 | 126.46 | 126.92 | 126.92 | -0.31% | 864,951 |
| Jun 25, 2025 | 126.30 | 127.98 | 125.13 | 127.31 | 127.31 | 0.79% | 1,095,917 |
| Jun 24, 2025 | 125.57 | 127.36 | 125.02 | 126.31 | 126.31 | 1.24% | 938,208 |
| Jun 23, 2025 | 126.90 | 127.68 | 123.21 | 124.76 | 124.76 | -1.79% | 1,190,232 |
| Jun 20, 2025 | 127.96 | 128.64 | 126.12 | 127.04 | 127.04 | 0.40% | 2,166,571 |
| Jun 18, 2025 | 127.06 | 127.88 | 125.24 | 126.54 | 126.54 | -0.02% | 2,331,174 |
| Jun 17, 2025 | 130.27 | 130.70 | 126.49 | 126.56 | 126.56 | -3.42% | 1,154,818 |
| Jun 16, 2025 | 131.49 | 131.58 | 128.83 | 131.04 | 131.04 | 0.30% | 1,112,006 |
| Jun 13, 2025 | 130.87 | 132.49 | 130.11 | 130.65 | 130.65 | -1.25% | 1,207,509 |
| Jun 12, 2025 | 132.93 | 134.12 | 131.47 | 132.31 | 132.31 | -0.56% | 1,147,651 |
| Jun 11, 2025 | 135.90 | 136.41 | 132.90 | 133.06 | 133.06 | -1.79% | 1,331,148 |
| Jun 10, 2025 | 134.25 | 136.84 | 133.42 | 135.49 | 135.49 | 1.00% | 991,129 |
| Jun 9, 2025 | 134.06 | 135.69 | 132.93 | 134.15 | 134.15 | 0.77% | 1,081,560 |
| Jun 6, 2025 | 131.55 | 133.72 | 131.45 | 133.13 | 133.13 | 2.12% | 1,166,151 |
| Jun 5, 2025 | 131.87 | 132.12 | 129.61 | 130.36 | 130.36 | -1.14% | 1,235,671 |
| Jun 4, 2025 | 132.45 | 133.66 | 131.67 | 131.86 | 131.86 | 0.02% | 1,472,904 |
| Jun 3, 2025 | 130.77 | 134.74 | 129.51 | 131.84 | 131.84 | 0.53% | 1,825,014 |