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Amphastar Pharma Short Interest Report
AMPHNASDAQ
Amphastar Pharma Stock Short Interest Report | NASDAQ:AMPH | Benzinga
Short interest in Amphastar Pharmaceuticals Inc (NASDAQ:AMPH) decreased during the last reporting period, falling from 3.59M to 3.34M. This put 14.79% of the company's publicly available shares short.
Based on the recent average volume of 385.89K shares traded per day, it would take 8.66 day(s) for holders of this short interest to close out their positions without sending the stock sharply higher.
Short Interest
3.34M
Short Interest %
14.8%
Days to Cover
8.66
| Get Alert | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| AMPH | Amphastar Pharmaceuticals, Inc | 11/28/2025 | 12/09/2025 | 14.79% | 22,601,799 | 3,343,646 | 385,893 | 8.66 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 11/14/2025 | 11/25/2025 | 15.88% | 22,601,799 | 3,589,725 | 546,145 | 6.57 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 10/31/2025 | 11/11/2025 | 18.56% | 22,601,799 | 4,194,131 | 360,887 | 11.62 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 10/15/2025 | 10/24/2025 | 18.54% | 23,144,702 | 4,291,932 | 360,143 | 11.92 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 09/30/2025 | 10/09/2025 | 17.18% | 23,144,702 | 3,977,178 | 546,368 | 7.28 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 09/15/2025 | 09/24/2025 | 17.85% | 23,144,702 | 4,130,306 | 411,975 | 10.03 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 08/29/2025 | 09/10/2025 | 17.95% | 23,144,702 | 4,155,237 | 406,559 | 10.22 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 08/15/2025 | 08/26/2025 | 17.86% | 23,144,702 | 4,134,257 | 810,532 | 5.1 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 07/31/2025 | 08/11/2025 | 17.39% | 23,144,702 | 4,024,867 | 442,912 | 9.09 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 07/15/2025 | 07/24/2025 | 16.84% | 23,788,710 | 4,005,661 | 484,164 | 8.27 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 06/30/2025 | 07/10/2025 | 17.08% | 23,788,710 | 4,062,426 | 521,557 | 7.79 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 06/13/2025 | 06/25/2025 | 17.15% | 23,788,710 | 4,080,346 | 502,123 | 8.13 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 05/30/2025 | 06/10/2025 | 17.22% | 23,788,710 | 4,096,720 | 454,981 | 9 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 05/15/2025 | 05/27/2025 | 16.84% | 23,788,710 | 4,005,726 | 653,028 | 6.13 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 04/30/2025 | 05/09/2025 | 13.28% | 24,151,817 | 3,206,270 | 465,275 | 6.89 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 04/15/2025 | 04/25/2025 | 12.29% | 24,151,817 | 2,967,637 | 784,370 | 3.78 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 03/31/2025 | 04/09/2025 | 10.94% | 31,281,427 | 3,422,379 | 601,463 | 5.69 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 03/14/2025 | 03/25/2025 | 12.32% | 31,281,427 | 3,852,850 | 636,431 | 6.05 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 02/28/2025 | 03/11/2025 | 13.20% | 31,281,427 | 4,128,332 | 736,476 | 5.61 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 02/14/2025 | 02/26/2025 | 13.02% | 31,281,427 | 4,072,042 | 401,414 | 10.14 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 01/31/2025 | 02/11/2025 | 13.17% | 31,281,427 | 4,119,788 | 490,819 | 8.39 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 01/15/2025 | 01/27/2025 | 14.71% | 31,281,427 | 4,600,052 | 657,526 | 7 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 12/31/2024 | 01/10/2025 | 15.39% | 31,281,427 | 4,815,210 | 718,031 | 6.71 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 12/13/2024 | 12/24/2024 | 13.96% | 31,281,427 | 4,365,856 | 484,849 | 9 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 11/29/2024 | 12/10/2024 | 13.18% | 31,281,427 | 4,124,250 | 411,610 | 10.02 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 11/15/2024 | 11/26/2024 | 13.54% | 31,281,427 | 4,235,323 | 476,198 | 8.89 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 10/31/2024 | 11/11/2024 | 13.88% | 31,281,427 | 4,341,583 | 267,396 | 16.24 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 10/15/2024 | 10/24/2024 | 13.19% | 32,101,959 | 4,232,894 | 273,281 | 15.49 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 09/30/2024 | 10/09/2024 | 13.56% | 32,101,959 | 4,352,216 | 361,534 | 12.04 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 09/13/2024 | 09/24/2024 | 12.85% | 32,101,959 | 4,126,510 | 370,270 | 11.14 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 08/30/2024 | 09/11/2024 | 13.11% | 32,101,959 | 4,208,460 | 319,689 | 13.16 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 08/15/2024 | 08/26/2024 | 13.11% | 32,101,959 | 4,209,460 | 437,825 | 9.61 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 07/31/2024 | 08/09/2024 | 14.16% | 32,101,959 | 4,546,013 | 374,038 | 12.15 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 07/15/2024 | 07/24/2024 | 13.19% | 32,101,959 | 4,234,643 | 455,443 | 9.3 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 06/28/2024 | 07/10/2024 | 12.98% | 32,101,959 | 4,167,480 | 330,058 | 12.63 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 06/14/2024 | 06/26/2024 | 12.92% | 32,101,959 | 4,146,983 | 378,909 | 10.94 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 05/31/2024 | 06/11/2024 | 11.73% | 32,101,959 | 3,764,831 | 282,364 | 13.33 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 05/15/2024 | 05/24/2024 | 11.74% | 32,101,959 | 3,769,533 | 397,537 | 9.48 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 04/30/2024 | 05/09/2024 | 12.42% | 32,101,959 | 3,987,025 | 316,652 | 12.59 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 04/15/2024 | 04/24/2024 | 12.06% | 32,065,932 | 3,866,483 | 340,376 | 11.36 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 03/28/2024 | 04/09/2024 | 12.07% | 30,435,220 | 3,674,842 | 351,660 | 10.45 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 03/15/2024 | 03/26/2024 | 11.81% | 30,435,220 | 3,595,530 | 572,698 | 6.28 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 02/29/2024 | 03/11/2024 | 12.22% | 30,435,220 | 3,720,310 | 551,482 | 6.75 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 02/15/2024 | 02/27/2024 | 11.88% | 30,246,769 | 3,593,022 | 367,840 | 9.77 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 01/31/2024 | 02/09/2024 | 10.56% | 30,246,769 | 3,194,684 | 412,914 | 7.74 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 01/12/2024 | 01/24/2024 | 9.73% | 30,246,769 | 2,944,087 | 684,797 | 4.3 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 12/29/2023 | 01/10/2024 | 9.20% | 30,246,769 | 2,781,357 | 362,050 | 7.68 | Get Alert |
| AMPH | Amphastar Pharmaceuticals, Inc | 12/15/2023 | 12/27/2023 | 9.35% | 30,246,769 | 2,827,421 | 537,740 | 5.26 | Get Alert |
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