AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 211 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2022. The put-call ratio across all filers is 0.20 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2023 | $14,213 | +33.8% | 379 | 0.0% | 0.00% | +100.0% |
| Q4 2022 | $10,620 | -3.5% | 379 | 0.0% | 0.00% | -50.0% |
| Q3 2022 | $11,000 | -35.3% | 379 | -20.9% | 0.00% | -33.3% |
| Q2 2022 | $17,000 | +6.2% | 479 | +10.9% | 0.00% | +50.0% |
| Q1 2022 | $16,000 | +77.8% | 432 | +14.0% | 0.00% | +100.0% |
| Q4 2021 | $9,000 | +28.6% | 379 | 0.0% | 0.00% | 0.0% |
| Q3 2021 | $7,000 | -12.5% | 379 | 0.0% | 0.00% | 0.0% |
| Q2 2021 | $8,000 | +14.3% | 379 | 0.0% | 0.00% | -66.7% |
| Q1 2021 | $7,000 | +75.0% | 379 | +96.4% | 0.00% | +50.0% |
| Q3 2019 | $4,000 | -33.3% | 193 | -29.0% | 0.00% | -33.3% |
| Q2 2019 | $6,000 | 0.0% | 272 | -12.8% | 0.00% | 0.0% |
| Q1 2019 | $6,000 | -14.3% | 312 | -6.6% | 0.00% | 0.0% |
| Q4 2018 | $7,000 | 0.0% | 334 | -3.5% | 0.00% | 0.0% |
| Q3 2018 | $7,000 | +75.0% | 346 | +20.6% | 0.00% | +50.0% |
| Q2 2018 | $4,000 | – | 287 | – | 0.00% | – |
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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% |