AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 145 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q2 2021. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q1 2022 | $21,000 | -60.4% | 600 | -79.3% | 0.00% | -60.0% |
| Q1 2021 | $53,000 | +783.3% | 2,900 | +866.7% | 0.01% | +400.0% |
| Q4 2020 | $6,000 | -93.3% | 300 | -93.3% | 0.00% | -88.9% |
| Q3 2019 | $89,000 | -27.0% | 4,500 | -22.4% | 0.01% | -25.0% |
| Q2 2019 | $122,000 | +6000.0% | 5,800 | +4466.9% | 0.01% | – |
| Q4 2016 | $2,000 | -98.6% | 127 | -98.3% | 0.00% | -100.0% |
| Q3 2016 | $139,000 | +531.8% | 7,360 | +466.2% | 0.02% | +275.0% |
| Q2 2015 | $22,000 | – | 1,300 | – | 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% |