Institutional Ownership
Amphastar Pharmaceuticals In
CUSIP 03209R103COMAMPHQ1 2026
Shares Short
4.17M
As of Jul 15, 2026
Days to Cover
11.15
Short shares ÷ avg daily volume
Change vs Prior
+8.6%
vs previous settlement
Avg Daily Volume
374.3K
FINRA reported ADV
Short Interest History
17 settlements on record · FINRA consolidated
Higher short interest is bearish: increases show red, decreases green.
| Settlement | Shares Short | Prior | Change | Avg Daily Vol | Days to Cover |
|---|---|---|---|---|---|
| Jul 15, 2026 | 4.17M | 3.85M | +8.6% | 374.3K | 11.15 |
| Jun 30, 2026 | 3.85M | 3.80M | +1.2% | 734.2K | 5.24 |
| Jun 15, 2026 | 3.80M | 3.75M | +1.4% | 532.7K | 7.13 |
| May 29, 2026 | 3.75M | 3.78M | -0.9% | 792.6K | 4.73 |
| May 15, 2026 | 3.78M | 3.59M | +5.4% | 802.0K | 4.71 |
| Apr 30, 2026 | 3.59M | 3.90M | -8.1% | 411.6K | 8.71 |
| Apr 15, 2026 | 3.90M | 3.53M | +10.7% | 452.5K | 8.63 |
| Mar 31, 2026 | 3.53M | 3.74M | -5.6% | 526.8K | 6.70 |
| Mar 13, 2026 | 3.74M | 3.66M | +2.2% | 725.7K | 5.15 |
| Feb 27, 2026 | 3.66M | 3.72M | -1.6% | 596.7K | 6.13 |
| Feb 13, 2026 | 3.72M | 3.84M | -3.2% | 333.0K | 11.17 |
| Jan 30, 2026 | 3.84M | 3.80M | +1.1% | 256.4K | 14.99 |