BIIB
Biogen Inc.Company with tickers: BIIB
CIK
875045
CUSIP
09062X103
Shares Outstanding
147,637,117
13F Activity (30d)
704 filings
673 filers
Short Volume (Last 90 Days)
| Date | Short Volume | Short Exempt | Total Volume | Short % |
|---|---|---|---|---|
| 2026-05-29 | 234,662 | 0 | 406,243 | 57.8% |
| 2026-05-28 | 123,097 | 144 | 187,136 | 65.8% |
| 2026-05-27 | 226,153 | 1 | 309,125 | 73.2% |
| 2026-05-26 | 206,807 | 75 | 272,504 | 75.9% |
| 2026-05-22 | 211,064 | 2 | 307,198 | 68.7% |
| 2026-05-21 | 208,628 | 0 | 855,812 | 24.4% |
| 2026-05-20 | 212,620 | 2,400 | 303,310 | 70.1% |
| 2026-05-19 | 296,191 | 0 | 431,599 | 68.6% |
| 2026-05-18 | 314,508 | 214 | 435,751 | 72.2% |
| 2026-05-15 | 352,691 | 0 | 466,630 | 75.6% |
| 2026-05-14 | 822,048 | 1,075 | 1,230,815 | 66.8% |
| 2026-05-13 | 366,010 | 0 | 555,948 | 65.8% |
| 2026-05-12 | 266,246 | 1,213 | 534,032 | 49.9% |
| 2026-05-11 | 341,214 | 0 | 489,890 | 69.7% |
| 2026-05-08 | 222,332 | 605 | 319,415 | 69.6% |
| 2026-05-07 | 216,173 | 0 | 286,628 | 75.4% |
| 2026-05-06 | 141,229 | 0 | 238,218 | 59.3% |
| 2026-05-05 | 146,949 | 0 | 196,865 | 74.6% |
| 2026-05-04 | 159,284 | 132 | 225,519 | 70.6% |
| 2026-05-01 | 200,283 | 0 | 279,424 | 71.7% |
| 2026-04-30 | 325,270 | 0 | 560,551 | 58.0% |
| 2026-04-29 | 592,111 | 83 | 969,922 | 61.0% |
| 2026-04-28 | 270,922 | 0 | 427,070 | 63.4% |
| 2026-04-27 | 252,869 | 0 | 469,421 | 53.9% |
| 2026-04-24 | 169,086 | 0 | 291,339 | 58.0% |
| 2026-04-23 | 224,320 | 5 | 298,955 | 75.0% |
| 2026-04-22 | 445,259 | 0 | 573,772 | 77.6% |
| 2026-04-21 | 318,217 | 4 | 465,694 | 68.3% |
| 2026-04-20 | 341,572 | 178 | 579,253 | 59.0% |
| 2026-04-17 | 189,809 | 460 | 335,845 | 56.5% |
| 2026-04-16 | 127,807 | 154 | 264,228 | 48.4% |
| 2026-04-15 | 228,393 | 28 | 344,709 | 66.3% |
| 2026-04-14 | 408,399 | 2 | 607,748 | 67.2% |
| 2026-04-13 | 371,442 | 450 | 656,670 | 56.6% |
| 2026-04-10 | 247,076 | 6 | 407,021 | 60.7% |
| 2026-04-09 | 312,890 | 0 | 560,105 | 55.9% |
| 2026-04-08 | 236,764 | 0 | 495,732 | 47.8% |
| 2026-04-07 | 255,684 | 51 | 544,890 | 46.9% |
| 2026-04-06 | 399,369 | 4 | 880,715 | 45.3% |