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 | $35,550 | -42.8% | 773 | -28.5% | 0.00% | – |
| Q2 2023 | $62,125 | -50.7% | 1,081 | -67.8% | 0.00% | – |
| Q1 2023 | $125,926 | +36.2% | 3,358 | +1.8% | 0.00% | – |
| Q4 2022 | $92,466 | +32.1% | 3,300 | +32.4% | 0.00% | – |
| Q3 2022 | $70,000 | 0.0% | 2,492 | +23.2% | 0.00% | – |
| Q2 2022 | $70,000 | +42.9% | 2,023 | +49.5% | 0.00% | – |
| Q1 2022 | $49,000 | +58.1% | 1,353 | +3.3% | 0.00% | – |
| Q4 2021 | $31,000 | +40.9% | 1,310 | +12.8% | 0.00% | – |
| Q3 2021 | $22,000 | -4.3% | 1,161 | 0.0% | 0.00% | – |
| Q2 2021 | $23,000 | +9.5% | 1,161 | 0.0% | 0.00% | – |
| Q1 2021 | $21,000 | -12.5% | 1,161 | -2.6% | 0.00% | – |
| Q4 2020 | $24,000 | +4.3% | 1,192 | 0.0% | 0.00% | – |
| Q3 2020 | $23,000 | -68.9% | 1,192 | -63.8% | 0.00% | – |
| Q2 2020 | $74,000 | +335.3% | 3,294 | +183.7% | 0.00% | – |
| Q1 2020 | $17,000 | -37.0% | 1,161 | -17.0% | 0.00% | – |
| Q4 2019 | $27,000 | +800.0% | 1,398 | +898.6% | 0.00% | – |
| Q1 2019 | $3,000 | -98.1% | 140 | -98.5% | 0.00% | -100.0% |
| Q2 2015 | $159,000 | +12.8% | 9,055 | -3.6% | 0.00% | 0.0% |
| Q1 2015 | $141,000 | +20.5% | 9,395 | -6.6% | 0.00% | – |
| Q4 2014 | $117,000 | – | 10,060 | – | 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% |