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 | $208,381 | -27.4% | 4,531 | -9.2% | 0.00% | -33.3% |
| Q2 2023 | $286,833 | -10.0% | 4,991 | -41.3% | 0.01% | -25.0% |
| Q1 2023 | $318,638 | -43.9% | 8,497 | -58.1% | 0.01% | -50.0% |
| Q4 2022 | $567,741 | -12.3% | 20,262 | -12.0% | 0.02% | -15.8% |
| Q3 2022 | $647,000 | -52.8% | 23,032 | -41.6% | 0.02% | -56.8% |
| Q2 2022 | $1,372,000 | +249.1% | 39,432 | +260.4% | 0.04% | +266.7% |
| Q1 2022 | $393,000 | -20.1% | 10,940 | -57.8% | 0.01% | +100.0% |
| Q3 2016 | $492,000 | +55.7% | 25,915 | +32.4% | 0.01% | +50.0% |
| Q2 2016 | $316,000 | – | 19,579 | – | 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% |