BIIB
Biogen Inc.
$191.95
-17.08 (-8.17%)
At close · Jul 14
Market Cap
$29.13B
Shares
147,637,117
Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.
Short Volume
| Date | Short Volume | Short Exempt | Total Volume | Short % |
|---|---|---|---|---|
| 2026-07-15 | 558,499 | 0 | 877,114 | 63.7% |
| 2026-07-14 | 1,202,445 | 6,356 | 1,741,969 | 69.0% |
| 2026-07-13 | 548,490 | 26 | 917,667 | 59.8% |
| 2026-07-10 | 165,851 | 278 | 291,168 | 57.0% |
| 2026-07-09 | 320,510 | 292 | 626,786 | 51.1% |
| 2026-07-08 | 304,989 | 706 | 883,468 | 34.5% |
| 2026-07-07 | 199,513 | 23 | 461,625 | 43.2% |
| 2026-07-06 | 279,008 | 545 | 482,520 | 57.8% |
| 2026-07-02 | 223,652 | 159 | 446,962 | 50.0% |
| 2026-07-01 | 191,789 | 1,089 | 409,444 | 46.8% |
| 2026-06-30 | 229,127 | 45 | 395,635 | 57.9% |
| 2026-06-29 | 235,927 | 1,264 | 473,249 | 49.9% |
| 2026-06-26 | 430,325 | 62 | 705,116 | 61.0% |
| 2026-06-25 | 179,376 | 0 | 373,822 | 48.0% |
| 2026-06-24 | 307,847 | 16,235 | 495,696 | 62.1% |
| 2026-06-23 | 172,727 | 0 | 327,247 | 52.8% |
| 2026-06-22 | 265,335 | 13,753 | 447,881 | 59.2% |
| 2026-06-18 | 155,793 | 65 | 260,065 | 59.9% |
| 2026-06-17 | 272,150 | 0 | 362,271 | 75.1% |
| 2026-06-16 | 159,126 | 314 | 373,601 | 42.6% |
| 2026-06-15 | 162,003 | 53 | 235,013 | 68.9% |
| 2026-06-12 | 246,197 | 1 | 349,577 | 70.4% |
| 2026-06-11 | 236,950 | 0 | 367,927 | 64.4% |
| 2026-06-10 | 265,392 | 0 | 359,640 | 73.8% |
| 2026-06-09 | 196,155 | 40 | 313,556 | 62.6% |
| 2026-06-08 | 196,008 | 0 | 469,033 | 41.8% |
| 2026-06-05 | 165,042 | 0 | 285,367 | 57.8% |
| 2026-06-04 | 157,209 | 2 | 285,063 | 55.1% |
| 2026-06-03 | 201,357 | 21 | 310,510 | 64.8% |
| 2026-06-02 | 215,048 | 30 | 336,535 | 63.9% |
| 2026-06-01 | 185,319 | 1,219 | 319,543 | 58.0% |
| 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% |
Showing 1–50 of 63 days
Key facts
CIK
875045
CUSIP
09062X103
13F (30d)
121 filings
87 filers
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