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 | $90 | +650.0% | 1,966 | +859.0% | 0.07% | +655.6% |
| Q2 2023 | $12 | +500.0% | 205 | +355.6% | 0.01% | +350.0% |
| Q1 2023 | $2 | 0.0% | 45 | +18.4% | 0.00% | +100.0% |
| Q4 2022 | $2 | – | 38 | +192.3% | 0.00% | – |
| Q3 2022 | $0 | -100.0% | 13 | -50.0% | 0.00% | -100.0% |
| Q2 2022 | $1,000 | -85.7% | 26 | -87.1% | 0.00% | -80.0% |
| Q1 2022 | $7,000 | +40.0% | 201 | 0.0% | 0.01% | -28.6% |
| Q4 2021 | $5,000 | – | 201 | – | 0.01% | – |
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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% |