AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 167 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2021. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $2,483 | -20.0% | 54 | 0.0% | 0.00% | – |
| Q2 2023 | $3,103 | +53.2% | 54 | 0.0% | 0.00% | – |
| Q1 2023 | $2,025 | +72.0% | 54 | +28.6% | 0.00% | – |
| Q4 2022 | $1,177 | -70.6% | 42 | -70.8% | 0.00% | -100.0% |
| Q3 2022 | $4,000 | +33.3% | 144 | +89.5% | 0.00% | – |
| Q2 2022 | $3,000 | -25.0% | 76 | -27.6% | 0.00% | -100.0% |
| Q1 2022 | $4,000 | +100.0% | 105 | +38.2% | 0.00% | – |
| Q4 2021 | $2,000 | +100.0% | 76 | +81.0% | 0.00% | – |
| Q3 2021 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q2 2021 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q1 2021 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q4 2020 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q3 2020 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q2 2020 | $1,000 | 0.0% | 42 | 0.0% | 0.00% | – |
| Q1 2020 | $1,000 | – | 42 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| FRIESS ASSOCIATES LLC | 97,760 | $3,401,000 | 5.68% |
| Nantahala Capital Management | 1,000,000 | $34,790,000 | 1.74% |
| MESIROW FINANCIAL INVESTMENT MANAGEMENT - Fixed Income | 341,294 | $11,874,000 | 1.52% |
| Portolan Capital Management | 274,889 | $9,563,000 | 0.96% |
| Quantedge Capital Pte Ltd | 121,500 | $4,227,000 | 0.85% |
| SHAKER INVESTMENTS LLC/OH | 37,117 | $1,291,000 | 0.82% |
| GLOBEFLEX CAPITAL L P | 72,253 | $2,514,000 | 0.61% |
| EAM Investors, LLC | 68,855 | $2,395,000 | 0.58% |
| Hillsdale Investment Management Inc. | 197,738 | $6,879,000 | 0.55% |
| Capital Impact Advisors, LLC | 13,835 | $481,000 | 0.44% |