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RARE · Ultragenyx Pharmaceutical Inc. · Short Volume

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$16.08 +0.43 (+2.75%) At close · Oct 26
Russell 2000 member Rebalance outlook locked
Market Cap
$1.54B
Shares
98.59M
Volume · Oct 26 3.02M Avg daily vol (3M) 4.12M

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.

Pull daily short volume through the short interest API or MCP →
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    • Short Volume

    Date Short Volume Short Exempt Total Volume Short %
    2026-10-26 960,808 0 1,447,401 66.4%
    2026-10-23 274,250 0 557,538 49.2%
    2026-10-22 381,820 0 956,916 39.9%
    2026-10-21 509,230 0 1,046,358 48.7%
    2026-10-20 647,259 5,907 1,350,980 47.9%
    2026-10-19 484,858 0 1,225,333 39.6%
    2026-10-16 370,684 1,000 922,549 40.2%
    2026-10-15 573,532 0 1,366,923 42.0%
    2026-10-14 409,618 1,046 1,011,180 40.5%
    2026-10-13 326,235 0 1,556,460 21.0%
    2026-10-12 319,302 0 973,670 32.8%
    2026-10-09 384,188 1,717 1,054,263 36.4%
    2026-10-08 858,790 2,921 1,978,838 43.4%
    2026-10-07 566,412 679 1,796,103 31.5%
    2026-10-06 690,786 3,947 1,639,592 42.1%
    2026-10-05 693,812 259 2,004,684 34.6%
    2026-10-02 683,597 127 1,510,809 45.2%
    2026-10-01 753,757 9,102 1,272,154 59.3%
    2026-09-30 984,700 150 1,822,889 54.0%
    2026-09-29 995,749 502 2,390,630 41.7%
    2026-09-28 731,786 148 1,534,089 47.7%
    2026-09-25 859,494 636 2,268,411 37.9%
    2026-09-24 537,438 0 2,008,917 26.8%
    2026-09-23 1,225,131 7,262 2,392,908 51.2%
    2026-09-22 1,583,448 8,005 3,789,942 41.8%
    2026-09-21 914,121 2,805 2,651,826 34.5%
    2026-09-18 2,905,753 4,665 5,005,362 58.1%
    2026-09-17 2,216,234 8,501 5,152,928 43.0%
    2026-09-16 1,090,987 8,015 2,251,938 48.4%
    2026-09-15 930,129 10,639 2,271,852 40.9%
    2026-09-14 914,056 13,788 1,974,788 46.3%
    2026-09-11 517,142 5,265 1,175,318 44.0%
    2026-09-10 629,929 0 1,556,960 40.5%
    2026-09-09 709,891 0 1,677,077 42.3%
    2026-09-08 1,049,088 100 2,365,032 44.4%
    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%
    Showing 1–50 of 65 days
    Key facts CIK 1515673 CUSIP 90400D108 13F (30d) 26 filings 26 filers Visit website Investor relations