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Biogen Stock Short Interest Report | NASDAQ:BIIB | Benzinga
Short interest in Biogen Inc (NASDAQ:BIIB) increased during the last reporting period, rising from 6.14M to 6.78M. This put 5.97% of the company's publicly available shares short.
Based on the recent average volume of 2.08M shares traded per day, it would take 3.26 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.
Short Interest
6.78M
Short Interest %
5.97%
Days to Cover
3.26
| Get Alert | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| BIIB | Biogen Inc. Common Stock | 11/28/2025 | 12/09/2025 | 5.97% | 113,582,697 | 6,777,473 | 2,080,199 | 3.26 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 11/14/2025 | 11/25/2025 | 5.41% | 113,582,697 | 6,140,844 | 1,922,869 | 3.19 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 10/31/2025 | 11/11/2025 | 4.97% | 113,582,697 | 5,644,654 | 1,566,934 | 3.6 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 10/15/2025 | 10/24/2025 | 4.57% | 113,495,023 | 5,191,008 | 1,926,364 | 2.69 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 09/30/2025 | 10/09/2025 | 4.30% | 113,495,023 | 4,880,043 | 1,636,581 | 2.98 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 09/15/2025 | 09/24/2025 | 4.52% | 113,495,023 | 5,125,778 | 1,704,531 | 3.01 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 08/29/2025 | 09/10/2025 | 4.16% | 113,495,023 | 4,720,975 | 1,316,930 | 3.58 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 08/15/2025 | 08/26/2025 | 3.66% | 113,495,023 | 4,155,186 | 1,549,085 | 2.68 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 07/31/2025 | 08/11/2025 | 3.49% | 113,495,023 | 3,959,672 | 1,423,928 | 2.78 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 07/15/2025 | 07/24/2025 | 3.44% | 113,408,257 | 3,896,146 | 1,204,591 | 3.23 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 06/30/2025 | 07/10/2025 | 3.53% | 113,408,257 | 4,000,596 | 1,304,129 | 3.07 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 06/13/2025 | 06/25/2025 | 2.99% | 113,408,257 | 3,389,242 | 1,319,385 | 2.57 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 05/30/2025 | 06/10/2025 | 3.35% | 113,408,257 | 3,795,285 | 1,780,738 | 2.13 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 05/15/2025 | 05/27/2025 | 2.94% | 113,408,257 | 3,339,605 | 1,732,151 | 1.93 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 04/30/2025 | 05/09/2025 | 2.81% | 113,408,257 | 3,184,274 | 1,469,396 | 2.17 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 04/15/2025 | 04/25/2025 | 2.65% | 129,813,829 | 3,446,446 | 2,053,207 | 1.68 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 03/31/2025 | 04/09/2025 | 2.58% | 129,813,829 | 3,343,887 | 1,602,989 | 2.09 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 03/14/2025 | 03/25/2025 | 2.55% | 129,813,829 | 3,310,573 | 1,914,508 | 1.73 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 02/28/2025 | 03/11/2025 | 2.87% | 129,813,829 | 3,719,971 | 1,620,071 | 2.3 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 02/14/2025 | 02/26/2025 | 2.99% | 129,813,829 | 3,883,735 | 1,652,272 | 2.35 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 01/31/2025 | 02/11/2025 | 2.90% | 129,158,232 | 3,741,109 | 1,286,729 | 2.91 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 01/15/2025 | 01/27/2025 | 2.92% | 129,158,232 | 3,769,744 | 1,251,215 | 3.01 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 12/31/2024 | 01/10/2025 | 2.85% | 129,158,232 | 3,676,606 | 1,668,315 | 2.2 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 12/13/2024 | 12/24/2024 | 2.00% | 129,158,232 | 2,576,781 | 1,327,099 | 1.94 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 11/29/2024 | 12/10/2024 | 2.11% | 129,158,232 | 2,722,956 | 1,546,388 | 1.76 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 11/15/2024 | 11/26/2024 | 2.09% | 129,158,232 | 2,695,410 | 1,849,871 | 1.46 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 10/31/2024 | 11/11/2024 | 2.42% | 129,158,232 | 3,120,565 | 1,240,246 | 2.52 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 10/15/2024 | 10/24/2024 | 2.38% | 129,100,534 | 3,067,263 | 1,411,029 | 2.17 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 09/30/2024 | 10/09/2024 | 2.21% | 129,100,534 | 2,849,021 | 1,273,973 | 2.24 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 09/13/2024 | 09/24/2024 | 2.84% | 129,100,534 | 3,667,853 | 856,837 | 4.28 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 08/30/2024 | 09/11/2024 | 2.59% | 129,100,534 | 3,337,604 | 691,064 | 4.83 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 08/15/2024 | 08/26/2024 | 2.07% | 129,100,534 | 2,678,663 | 1,061,522 | 2.52 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 07/31/2024 | 08/09/2024 | 2.12% | 129,100,534 | 2,734,637 | 1,156,972 | 2.36 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 07/15/2024 | 07/24/2024 | 2.81% | 129,035,787 | 3,627,047 | 774,005 | 4.69 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 06/28/2024 | 07/10/2024 | 2.13% | 129,035,787 | 2,742,123 | 1,245,561 | 2.2 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 06/14/2024 | 06/26/2024 | 2.38% | 129,035,787 | 3,068,285 | 947,387 | 3.24 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 05/31/2024 | 06/11/2024 | 2.34% | 129,035,787 | 3,017,787 | 973,189 | 3.1 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 05/15/2024 | 05/24/2024 | 2.69% | 129,035,787 | 3,475,964 | 1,039,286 | 3.34 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 04/30/2024 | 05/09/2024 | 2.44% | 129,035,787 | 3,147,944 | 1,596,300 | 1.97 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 04/15/2024 | 04/24/2024 | 2.53% | 129,035,787 | 3,264,315 | 981,139 | 3.33 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 03/28/2024 | 04/09/2024 | 2.76% | 128,799,690 | 3,552,970 | 1,244,559 | 2.85 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 03/15/2024 | 03/26/2024 | 2.06% | 128,799,690 | 2,659,287 | 1,350,003 | 1.97 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 02/29/2024 | 03/11/2024 | 2.17% | 128,799,690 | 2,795,826 | 1,235,331 | 2.26 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 02/15/2024 | 02/27/2024 | 2.40% | 128,799,690 | 3,095,241 | 1,259,867 | 2.46 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 01/31/2024 | 02/09/2024 | 2.38% | 128,337,004 | 3,055,686 | 949,016 | 3.22 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 01/12/2024 | 01/24/2024 | 2.93% | 128,337,004 | 3,762,064 | 951,639 | 3.95 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 12/29/2023 | 01/10/2024 | 3.05% | 128,337,004 | 3,909,008 | 881,734 | 4.43 | Get Alert |
| BIIB | Biogen Inc. Common Stock | 12/15/2023 | 12/27/2023 | 2.30% | 128,337,004 | 2,950,681 | 1,413,059 | 2.09 | Get Alert |
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