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AMPH · Amphastar Pharmaceuticals, Inc. · Short Volume

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$25.94 -0.20 (-0.77%)
S&P 600 member Russell 2000 member Rebalance outlook locked
Market Cap
$1.10B
Shares
42.54M
Volume · Oct 20 360.18K Avg daily vol (3M) 470.54K

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 %
    2026-10-19 82,351 0 122,630 67.2%
    2026-10-16 80,289 0 135,811 59.1%
    2026-10-15 97,692 0 145,502 67.1%
    2026-10-14 101,098 10 144,571 69.9%
    2026-10-13 86,148 0 125,337 68.7%
    2026-10-12 52,639 0 112,345 46.9%
    2026-10-09 78,460 200 112,467 69.8%
    2026-10-08 82,118 0 172,522 47.6%
    2026-10-07 104,766 0 188,107 55.7%
    2026-10-06 123,907 256 174,099 71.2%
    2026-10-05 93,918 0 129,654 72.4%
    2026-10-02 115,603 866 148,229 78.0%
    2026-10-01 140,232 1,755 206,569 67.9%
    2026-09-30 114,707 10 204,696 56.0%
    2026-09-29 156,878 3,600 271,726 57.7%
    2026-09-28 193,453 0 284,701 67.9%
    2026-09-25 96,666 0 159,961 60.4%
    2026-09-24 118,579 0 195,459 60.7%
    2026-09-23 147,311 0 213,118 69.1%
    2026-09-22 107,479 0 166,361 64.6%
    2026-09-21 139,243 20 239,818 58.1%
    2026-09-18 114,925 0 161,785 71.0%
    2026-09-17 89,503 0 144,248 62.0%
    2026-09-16 127,227 0 176,635 72.0%
    2026-09-15 87,475 0 118,694 73.7%
    2026-09-14 111,071 0 172,418 64.4%
    2026-09-11 125,331 0 182,164 68.8%
    2026-09-10 130,263 124 165,127 78.9%
    2026-09-09 62,748 0 107,102 58.6%
    2026-09-08 113,472 661 165,986 68.4%
    2026-09-04 116,118 0 162,463 71.5%
    2026-09-03 101,892 0 147,866 68.9%
    2026-09-02 105,239 0 148,891 70.7%
    2026-09-01 67,361 0 105,995 63.6%
    2026-08-31 53,387 0 82,176 65.0%
    2026-08-28 63,425 0 84,730 74.9%
    2026-08-27 46,262 0 78,181 59.2%
    2026-08-26 102,281 0 153,731 66.5%
    2026-08-25 76,237 800 119,901 63.6%
    2026-08-24 39,158 0 67,059 58.4%
    2026-08-21 61,731 162 89,472 69.0%
    2026-08-20 76,087 365 124,147 61.3%
    2026-08-19 107,356 0 156,367 68.7%
    2026-08-18 85,844 99 156,145 55.0%
    2026-08-17 170,923 0 225,894 75.7%
    2026-08-14 88,388 0 115,378 76.6%
    2026-08-13 78,575 0 120,734 65.1%
    2026-08-12 84,721 0 141,566 59.8%
    2026-08-11 86,442 0 133,465 64.8%
    2026-08-10 183,660 0 254,005 72.3%
    Showing 1–50 of 65 days
    Key facts CIK 1297184 CUSIP 03209R103 13F (30d) 21 filings 21 filers Visit website Investor relations