AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 204 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q1 2022. The put-call ratio across all filers is 16.41 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $23 | -20.7% | 496 | -2.9% | 0.00% | – |
| Q2 2023 | $29 | +52.6% | 511 | 0.0% | 0.00% | – |
| Q1 2023 | $19 | +18.8% | 511 | -11.3% | 0.00% | – |
| Q4 2022 | $16 | -99.9% | 576 | -0.2% | 0.00% | – |
| Q3 2022 | $16,000 | -20.0% | 577 | +2.5% | 0.00% | – |
| Q2 2022 | $20,000 | +5.3% | 563 | +6.4% | 0.00% | – |
| Q1 2022 | $19,000 | +280.0% | 529 | +129.0% | 0.00% | – |
| Q4 2021 | $5,000 | – | 231 | – | 0.00% | – |
Download | ||||||
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% |