AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 250 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q3 2023. The put-call ratio across all filers is 1.02 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $12,556 | -20.0% | 273 | 0.0% | 0.00% | -25.0% |
| Q2 2023 | $15,690 | +97.3% | 273 | +28.8% | 0.00% | +100.0% |
| Q1 2023 | $7,951 | +50.2% | 212 | +12.2% | 0.00% | 0.0% |
| Q4 2022 | $5,295 | +76.5% | 189 | +61.5% | 0.00% | +100.0% |
| Q3 2022 | $3,000 | -25.0% | 117 | 0.0% | 0.00% | 0.0% |
| Q2 2022 | $4,000 | 0.0% | 117 | 0.0% | 0.00% | 0.0% |
| Q1 2022 | $4,000 | +33.3% | 117 | 0.0% | 0.00% | 0.0% |
| Q4 2021 | $3,000 | – | 117 | +1362.5% | 0.00% | – |
| Q2 2021 | $0 | -100.0% | 8 | -85.2% | 0.00% | – |
| Q4 2020 | $1,000 | 0.0% | 54 | +54.3% | 0.00% | – |
| Q3 2020 | $1,000 | – | 35 | +59.1% | 0.00% | – |
| Q2 2020 | $0 | – | 22 | -8.3% | 0.00% | – |
| Q1 2020 | $0 | -100.0% | 24 | -38.5% | 0.00% | – |
| Q3 2019 | $1,000 | – | 39 | +77.3% | 0.00% | – |
| Q2 2019 | $0 | -100.0% | 22 | -26.7% | 0.00% | – |
| Q1 2019 | $1,000 | 0.0% | 30 | -25.0% | 0.00% | – |
| Q4 2018 | $1,000 | 0.0% | 40 | 0.0% | 0.00% | – |
| Q3 2018 | $1,000 | – | 40 | +37.9% | 0.00% | – |
| Q2 2018 | $0 | -100.0% | 29 | -50.0% | 0.00% | – |
| Q1 2018 | $1,000 | 0.0% | 58 | +100.0% | 0.00% | – |
| Q4 2017 | $1,000 | 0.0% | 29 | 0.0% | 0.00% | – |
| Q3 2017 | $1,000 | 0.0% | 29 | 0.0% | 0.00% | – |
| Q2 2017 | $1,000 | – | 29 | 0.0% | 0.00% | – |
| Q1 2017 | $0 | – | 29 | +26.1% | 0.00% | – |
| Q4 2016 | $0 | – | 23 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| LAM GROUP, INC. | 130,250 | $4,884,375 | 4.79% |
| SHAKER INVESTMENTS LLC/OH | 82,253 | $3,084,488 | 1.72% |
| Mesirow Institutional Investment Management, Inc. | 325,669 | $12,212,588 | 1.33% |
| Portolan Capital Management | 340,593 | $12,772,238 | 1.22% |
| OBERWEIS ASSET MANAGEMENT INC/ | 178,200 | $6,682,500 | 1.04% |
| Granite Investment Partners, LLC | 536,821 | $20,130,788 | 0.84% |
| Capital Impact Advisors, LLC | 15,304 | $573,900 | 0.70% |
| Hillsdale Investment Management Inc. | 155,038 | $5,813,926 | 0.50% |
| GLOBEFLEX CAPITAL L P | 89,192 | $3,344,700 | 0.41% |
| Jackson Creek Investment Advisors LLC | 25,877 | $970 | 0.41% |