AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 4 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2023. The put-call ratio across all filers is - and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q4 2023 | $1,162,533 | +42.7% | 18,796 | +6.1% | 0.53% | +32.7% |
| Q3 2023 | $814,529 | -11.0% | 17,711 | +11.3% | 0.40% | -7.0% |
| Q2 2023 | $914,693 | +13.7% | 15,916 | -25.8% | 0.43% | +8.1% |
| Q1 2023 | $804,488 | +133.3% | 21,453 | +74.3% | 0.40% | +141.5% |
| Q4 2022 | $344,786 | +0.5% | 12,305 | +0.8% | 0.16% | -4.1% |
| Q3 2022 | $343,000 | +69.0% | 12,208 | +109.4% | 0.17% | +71.0% |
| Q2 2022 | $203,000 | – | 5,829 | – | 0.10% | – |
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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% |