AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 241 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q2 2023. The put-call ratio across all filers is 0.69 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2023 | $819 | -99.9% | 21,852 | -36.5% | 0.08% | -22.9% |
| Q1 2021 | $631,000 | +25.2% | 34,425 | +4.3% | 0.10% | +320.0% |
| Q2 2018 | $504,000 | +26.0% | 33,000 | +47.3% | 0.02% | -7.4% |
| Q3 2017 | $400,000 | -61.6% | 22,400 | -60.4% | 0.03% | -56.5% |
| Q4 2016 | $1,042,000 | +203.8% | 56,544 | +212.4% | 0.06% | +244.4% |
| Q3 2016 | $343,000 | +109.1% | 18,100 | +57.4% | 0.02% | +125.0% |
| Q4 2015 | $164,000 | +12.3% | 11,500 | -7.9% | 0.01% | +14.3% |
| Q3 2015 | $146,000 | -32.1% | 12,486 | -13.3% | 0.01% | -22.2% |
| Q1 2015 | $215,000 | -38.9% | 14,400 | -52.5% | 0.01% | -64.0% |
| Q4 2014 | $352,000 | – | 30,300 | – | 0.02% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| EAM Investors, LLC | 173,018 | $3,187,000 | 0.42% |
| GLOBEFLEX CAPITAL L P | 50,686 | $934,000 | 0.23% |
| KALMAR INVESTMENTS INC /DE/ | 240,648 | $4,433,000 | 0.23% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 63,661 | $1,173,000 | 0.19% |
| OBERWEIS ASSET MANAGEMENT INC/ | 27,200 | $501,000 | 0.15% |
| Invictus RG | 11,950 | $220,000 | 0.15% |
| ACADIAN ASSET MANAGEMENT LLC | 1,502,151 | $27,668,000 | 0.13% |
| FOX RUN MANAGEMENT, L.L.C. | 12,600 | $232,000 | 0.12% |
| Piermont Capital Management Inc. | 26,153 | $482,000 | 0.11% |
| FEDERATED HERMES, INC. | 1,344,684 | $24,769,000 | 0.07% |