AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 119 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2019. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2023 | $509,644 | +74.3% | 8,868 | +13.7% | 0.08% | +87.5% |
| Q1 2023 | $292,463 | +17.0% | 7,799 | -37.1% | 0.04% | -9.1% |
| Q2 2021 | $250,000 | -15.3% | 12,390 | -22.9% | 0.04% | +12.8% |
| Q1 2021 | $295,000 | -31.1% | 16,077 | -24.4% | 0.04% | -30.4% |
| Q4 2020 | $428,000 | -4.5% | 21,272 | -11.0% | 0.06% | -1.8% |
| Q3 2020 | $448,000 | +853.2% | 23,900 | +662.6% | 0.06% | +850.0% |
| Q1 2020 | $47,000 | +88.0% | 3,134 | +146.6% | 0.01% | +50.0% |
| Q4 2019 | $25,000 | – | 1,271 | – | 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% |