AMPH · Amphastar Pharmaceuticals, Inc. · Short Volume
$25.94
-0.20 (-0.77%)
At close · Oct 20
Return incl. dividend (before tax)
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.
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
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