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 | $9,767 | -20.0% | 212,368 | 0.0% | 0.02% | -14.8% |
| Q2 2023 | $12,205 | +880.3% | 212,368 | +539.7% | 0.03% | +800.0% |
| Q1 2023 | $1,245 | +315.0% | 33,200 | +210.3% | 0.00% | +200.0% |
| Q4 2022 | $300 | -99.9% | 10,700 | 0.0% | 0.00% | 0.0% |
| Q3 2022 | $301,000 | -93.2% | 10,700 | -91.6% | 0.00% | -90.0% |
| Q2 2022 | $4,420,000 | -11.9% | 127,053 | -9.1% | 0.01% | +11.1% |
| Q1 2022 | $5,017,000 | +153.9% | 139,753 | +64.7% | 0.01% | +200.0% |
| Q4 2021 | $1,976,000 | +110.9% | 84,846 | +72.1% | 0.00% | +50.0% |
| Q3 2021 | $937,000 | +53.1% | 49,300 | +62.2% | 0.00% | +100.0% |
| Q2 2021 | $612,000 | – | 30,400 | – | 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% |