AMPH
Amphastar Pharmaceuticals, Inc.
$18.72
-0.30 (-1.58%)
At close · Jul 10
Market Cap
$825.42M
Shares
44,092,919
Total shares sold short and not yet covered, reported to FINRA by broker-dealers and published twice a month (bi-monthly). Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.
Short Squeeze Score
68/100
Short interest 8.7% of shares — P86
Days to cover 5.2 — P82
Price vs VWAP -4.6% — P37
Short-volume trend +6.6% — P74
Short interest change +1.2% — P51
Worst FTD 0.00% of shares — P37
Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-06-30). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
| 2026-06-30 | 3,845,576 | 3,799,584 | +45,992 | 5.24 |
| 2026-06-15 | 3,799,584 | 3,747,543 | +52,041 | 7.13 |
| 2026-05-29 | 3,747,543 | 3,779,877 | -32,334 | 4.73 |
| 2026-05-15 | 3,779,877 | 3,585,957 | +193,920 | 4.71 |
| 2026-04-30 | 3,585,957 | 3,903,290 | -317,333 | 8.71 |
| 2026-04-15 | 3,903,290 | 3,527,477 | +375,813 | 8.63 |
| 2026-03-31 | 3,527,477 | 3,738,333 | -210,856 | 6.70 |
| 2026-03-13 | 3,738,333 | 3,658,291 | +80,042 | 5.15 |
| 2026-02-27 | 3,658,291 | 3,719,566 | -61,275 | 6.13 |
| 2026-02-13 | 3,719,566 | 3,843,799 | -124,233 | 11.17 |
| 2026-01-30 | 3,843,799 | 3,803,135 | +40,664 | 14.99 |
| 2026-01-15 | 3,803,135 | 4,096,041 | -292,906 | 9.91 |
| 2025-12-31 | 4,096,041 | 3,981,951 | +114,090 | 11.40 |
| 2025-12-15 | 3,981,951 | 3,343,646 | +638,305 | 10.62 |
| 2025-11-28 | 3,343,646 | 3,589,725 | -246,079 | 8.66 |
| 2025-11-14 | 3,589,725 | 4,194,131 | -604,406 | 6.57 |
| 2025-10-31 | 4,194,131 | 4,291,932 | -97,801 | 11.62 |
| 2025-10-15 | 4,291,932 | 3,977,178 | +314,754 | 11.92 |
| 2025-09-30 | 3,977,178 | 4,130,306 | -153,128 | 7.28 |
| 2025-09-15 | 4,130,306 | 4,155,237 | -24,931 | 10.03 |
| 2025-08-29 | 4,155,237 | 4,134,257 | +20,980 | 10.22 |
| 2025-08-15 | 4,134,257 | 4,024,867 | +109,390 | 5.10 |
| 2025-07-31 | 4,024,867 | 4,005,661 | +19,206 | 9.09 |
| 2025-07-15 | 4,005,661 | 4,062,426 | -56,765 | 8.27 |
Showing 1–24 of 24 settlements
Key facts
CIK
1297184
CUSIP
03209R103
13F (30d)
13 filings
12 filers
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