AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 213 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q1 2023. The put-call ratio across all filers is 0.26 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $51,969 | -20.0% | 1,130 | 0.0% | 0.00% | – |
| Q2 2023 | $64,941 | +154521.4% | 1,130 | 0.0% | 0.00% | – |
| Q1 2023 | $42 | +31.2% | 1,130 | 0.0% | 0.00% | – |
| Q4 2022 | $32 | -99.9% | 1,130 | 0.0% | 0.00% | – |
| Q3 2022 | $35,000 | -60.7% | 1,130 | -55.7% | 0.00% | -100.0% |
| Q2 2022 | $89,000 | +18.7% | 2,550 | +22.0% | 0.00% | 0.0% |
| Q1 2022 | $75,000 | -87.7% | 2,090 | -92.1% | 0.00% | -80.0% |
| Q4 2021 | $612,000 | +21.2% | 26,485 | -0.2% | 0.01% | +66.7% |
| Q3 2021 | $505,000 | -22.3% | 26,547 | -17.7% | 0.00% | -25.0% |
| Q2 2021 | $650,000 | +1.4% | 32,264 | -7.7% | 0.00% | 0.0% |
| Q1 2021 | $641,000 | -8.8% | 34,964 | 0.0% | 0.00% | -20.0% |
| Q4 2020 | $703,000 | +115.0% | 34,964 | +100.7% | 0.01% | +66.7% |
| Q3 2020 | $327,000 | -58.1% | 17,422 | -49.9% | 0.00% | -57.1% |
| Q2 2020 | $781,000 | +88.2% | 34,751 | +24.3% | 0.01% | +40.0% |
| Q1 2020 | $415,000 | -23.0% | 27,953 | 0.0% | 0.01% | 0.0% |
| Q4 2019 | $539,000 | +20.6% | 27,953 | +24.1% | 0.01% | +25.0% |
| Q3 2019 | $447,000 | -44.6% | 22,530 | -41.1% | 0.00% | -50.0% |
| Q2 2019 | $807,000 | +3.3% | 38,241 | 0.0% | 0.01% | 0.0% |
| Q1 2019 | $781,000 | +242.5% | 38,241 | +233.4% | 0.01% | +166.7% |
| Q4 2018 | $228,000 | +3.2% | 11,470 | 0.0% | 0.00% | +50.0% |
| Q3 2018 | $221,000 | – | 11,470 | – | 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% |