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 | $2,940 | -42.0% | 63,930 | -27.5% | 0.01% | -41.7% |
| Q2 2023 | $5,065 | +261.5% | 88,131 | +135.9% | 0.01% | +300.0% |
| Q1 2023 | $1,401 | +29.2% | 37,359 | -3.4% | 0.00% | 0.0% |
| Q4 2022 | $1,084 | -99.9% | 38,669 | -2.2% | 0.00% | 0.0% |
| Q3 2022 | $1,111,000 | -13.5% | 39,521 | +7.0% | 0.00% | 0.0% |
| Q2 2022 | $1,285,000 | +19.3% | 36,940 | +23.2% | 0.00% | +50.0% |
| Q1 2022 | $1,077,000 | +54.3% | 29,994 | +0.0% | 0.00% | +100.0% |
| Q4 2021 | $698,000 | +22.9% | 29,984 | +0.3% | 0.00% | 0.0% |
| Q3 2021 | $568,000 | -6.0% | 29,895 | -0.3% | 0.00% | 0.0% |
| Q2 2021 | $604,000 | +9.8% | 29,985 | -0.2% | 0.00% | 0.0% |
| Q1 2021 | $550,000 | -9.7% | 30,048 | -0.8% | 0.00% | 0.0% |
| Q4 2020 | $609,000 | +7.2% | 30,277 | -0.1% | 0.00% | -50.0% |
| Q3 2020 | $568,000 | -10.4% | 30,319 | +7.4% | 0.00% | 0.0% |
| Q2 2020 | $634,000 | +48.8% | 28,228 | -1.7% | 0.00% | 0.0% |
| Q1 2020 | $426,000 | -19.0% | 28,717 | +5.3% | 0.00% | +100.0% |
| Q4 2019 | $526,000 | -3.1% | 27,283 | -0.4% | 0.00% | -50.0% |
| Q3 2019 | $543,000 | -6.7% | 27,392 | -0.6% | 0.00% | 0.0% |
| Q2 2019 | $582,000 | +7.8% | 27,567 | +4.3% | 0.00% | 0.0% |
| Q1 2019 | $540,000 | +11.1% | 26,426 | +8.3% | 0.00% | 0.0% |
| Q4 2018 | $486,000 | +0.8% | 24,399 | -2.6% | 0.00% | 0.0% |
| Q3 2018 | $482,000 | +28.2% | 25,062 | +1.8% | 0.00% | +100.0% |
| Q2 2018 | $376,000 | -12.4% | 24,622 | +7.7% | 0.00% | 0.0% |
| Q1 2018 | $429,000 | 0.0% | 22,872 | +2.6% | 0.00% | 0.0% |
| Q4 2017 | $429,000 | +9.7% | 22,300 | +2.0% | 0.00% | 0.0% |
| Q3 2017 | $391,000 | +1.3% | 21,860 | +1.2% | 0.00% | -50.0% |
| Q2 2017 | $386,000 | +32.2% | 21,610 | +7.2% | 0.00% | +100.0% |
| Q1 2017 | $292,000 | -18.4% | 20,150 | +3.7% | 0.00% | -50.0% |
| Q4 2016 | $358,000 | -0.8% | 19,440 | +2.1% | 0.00% | 0.0% |
| Q3 2016 | $361,000 | – | 19,040 | – | 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% |