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CSTL · Castle Biosciences Inc · Short Volume

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$33.08 -0.11 (-0.33%) At close · Oct 23
Russell 2000 member Rebalance outlook locked
Market Cap
$1.01B
Shares
30.55M
Volume · Oct 23 203.08K Avg daily vol (3M) 399.95K

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 %
    2026-10-23 35,272 0 78,291 45.1%
    2026-10-22 70,325 0 156,961 44.8%
    2026-10-21 92,501 0 171,033 54.1%
    2026-10-20 41,858 0 96,285 43.5%
    2026-10-19 44,329 0 127,182 34.9%
    2026-10-16 65,642 0 127,305 51.6%
    2026-10-15 51,241 0 145,217 35.3%
    2026-10-14 47,220 0 83,010 56.9%
    2026-10-13 31,388 6 79,206 39.6%
    2026-10-12 38,343 0 94,573 40.5%
    2026-10-09 28,527 0 71,001 40.2%
    2026-10-08 50,053 0 97,312 51.4%
    2026-10-07 65,120 250 126,171 51.6%
    2026-10-06 123,806 0 218,127 56.8%
    2026-10-05 71,911 0 132,348 54.3%
    2026-10-02 35,137 0 52,071 67.5%
    2026-10-01 99,966 0 147,327 67.9%
    2026-09-30 100,958 0 177,863 56.8%
    2026-09-29 32,076 0 89,368 35.9%
    2026-09-28 24,457 0 92,545 26.4%
    2026-09-25 54,369 0 139,012 39.1%
    2026-09-24 66,134 0 138,271 47.8%
    2026-09-23 50,837 0 134,073 37.9%
    2026-09-22 33,222 0 138,931 23.9%
    2026-09-21 38,558 0 120,959 31.9%
    2026-09-18 53,470 600 80,895 66.1%
    2026-09-17 76,081 5,100 122,887 61.9%
    2026-09-16 108,359 1,629 215,969 50.2%
    2026-09-15 79,070 5 177,123 44.6%
    2026-09-14 21,772 0 45,768 47.6%
    2026-09-11 23,051 0 67,907 33.9%
    2026-09-10 37,244 0 99,683 37.4%
    2026-09-09 27,795 0 62,007 44.8%
    2026-09-08 51,771 0 76,349 67.8%
    2026-09-04 31,999 0 67,926 47.1%
    2026-09-03 37,919 0 79,216 47.9%
    2026-09-02 32,093 0 65,920 48.7%
    2026-09-01 82,650 0 135,445 61.0%
    2026-08-31 41,837 0 80,147 52.2%
    2026-08-28 35,111 0 93,947 37.4%
    2026-08-27 43,612 0 99,151 44.0%
    2026-08-26 67,781 0 201,582 33.6%
    2026-08-25 73,129 0 143,831 50.8%
    2026-08-24 84,810 0 149,939 56.6%
    2026-08-21 123,041 0 233,360 52.7%
    2026-08-20 72,406 0 132,657 54.6%
    2026-08-19 93,020 0 166,471 55.9%
    2026-08-18 69,975 0 130,172 53.8%
    2026-08-17 24,566 1,200 70,463 34.9%
    2026-08-14 22,275 0 97,330 22.9%
    Showing 1–50 of 64 days
    Key facts CIK 1447362 CUSIP 14843C105 13F (30d) 24 filings 24 filers Visit website Investor relations