RARE · Ultragenyx Pharmaceutical Inc.
Market Cap
$1.51B
Shares
98.59M
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 % |
|---|---|---|---|---|
| 2026-09-04 | 2,257,754 | 372,110 | 5,580,455 | 40.5% |
| 2026-09-03 | 6,455,598 | 746,401 | 13,466,913 | 47.9% |
| 2026-09-02 | 400,535 | 0 | 772,680 | 51.8% |
| 2026-09-01 | 242,610 | 0 | 896,221 | 27.1% |
| 2026-08-31 | 258,114 | 12 | 595,515 | 43.3% |
| 2026-08-28 | 197,005 | 600 | 495,918 | 39.7% |
| 2026-08-27 | 209,563 | 0 | 486,037 | 43.1% |
| 2026-08-26 | 339,695 | 610 | 652,594 | 52.1% |
| 2026-08-25 | 590,125 | 211 | 1,938,826 | 30.4% |
| 2026-08-24 | 262,603 | 9 | 591,525 | 44.4% |
| 2026-08-21 | 479,704 | 1,635 | 949,673 | 50.5% |
| 2026-08-20 | 763,848 | 149 | 1,494,937 | 51.1% |
| 2026-08-19 | 219,555 | 0 | 589,071 | 37.3% |
| 2026-08-18 | 204,631 | 537 | 617,153 | 33.2% |
| 2026-08-17 | 181,721 | 0 | 431,950 | 42.1% |
| 2026-08-14 | 209,483 | 0 | 521,355 | 40.2% |
| 2026-08-13 | 125,184 | 38 | 245,552 | 51.0% |
| 2026-08-12 | 214,033 | 2 | 433,492 | 49.4% |
| 2026-08-11 | 376,583 | 0 | 791,828 | 47.6% |
| 2026-08-10 | 380,387 | 0 | 819,920 | 46.4% |
| 2026-08-07 | 503,929 | 0 | 1,462,934 | 34.4% |
| 2026-08-06 | 314,607 | 141 | 573,529 | 54.9% |
| 2026-08-05 | 568,133 | 227 | 1,098,754 | 51.7% |
| 2026-08-04 | 211,677 | 15 | 633,341 | 33.4% |
| 2026-08-03 | 269,712 | 1,484 | 948,205 | 28.4% |
| 2026-07-31 | 234,724 | 24 | 442,059 | 53.1% |
| 2026-07-30 | 322,942 | 0 | 642,912 | 50.2% |
| 2026-07-29 | 423,611 | 0 | 653,014 | 64.9% |
| 2026-07-28 | 387,257 | 0 | 614,496 | 63.0% |
| 2026-07-27 | 333,226 | 0 | 535,654 | 62.2% |
| 2026-07-24 | 275,794 | 0 | 540,244 | 51.0% |
| 2026-07-23 | 202,755 | 0 | 411,278 | 49.3% |
| 2026-07-22 | 203,384 | 0 | 460,404 | 44.2% |
| 2026-07-21 | 298,959 | 200 | 628,168 | 47.6% |
| 2026-07-20 | 177,570 | 172 | 478,273 | 37.1% |
| 2026-07-17 | 218,101 | 430 | 522,230 | 41.8% |
| 2026-07-16 | 178,828 | 10 | 363,554 | 49.2% |
| 2026-07-15 | 155,457 | 0 | 335,215 | 46.4% |
| 2026-07-14 | 133,137 | 0 | 348,501 | 38.2% |
| 2026-07-13 | 285,154 | 0 | 563,295 | 50.6% |
| 2026-07-10 | 371,920 | 0 | 558,594 | 66.6% |
| 2026-07-09 | 426,508 | 0 | 829,023 | 51.4% |
| 2026-07-08 | 431,407 | 0 | 1,017,236 | 42.4% |
| 2026-07-07 | 578,904 | 117 | 1,822,974 | 31.8% |
| 2026-07-06 | 201,400 | 0 | 559,711 | 36.0% |
| 2026-07-02 | 276,272 | 1 | 493,841 | 55.9% |
| 2026-07-01 | 374,384 | 550 | 817,176 | 45.8% |
| 2026-06-30 | 919,195 | 501 | 2,760,046 | 33.3% |
| 2026-06-29 | 586,561 | 5,253 | 1,989,789 | 29.5% |
| 2026-06-26 | 467,069 | 0 | 1,238,442 | 37.7% |
Showing 1–50 of 63 days
Key facts
CIK
1515673
CUSIP
90400D108
13F (30d)
220 filings
219 filers
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