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 | ||||
|---|---|---|---|---|---|---|
| Q4 2021 | $36,000 | +227.3% | 1,562 | +178.9% | 0.00% | +300.0% |
| Q4 2020 | $11,000 | +22.2% | 560 | +21.0% | 0.00% | 0.0% |
| Q3 2020 | $9,000 | -97.2% | 463 | -96.8% | 0.00% | -97.7% |
| Q2 2020 | $324,000 | +383.6% | 14,435 | +326.1% | 0.04% | +760.0% |
| Q4 2018 | $67,000 | +4.7% | 3,388 | -1.9% | 0.01% | +400.0% |
| Q4 2016 | $64,000 | -92.4% | 3,452 | -92.2% | 0.00% | -94.4% |
| Q3 2016 | $842,000 | – | 44,369 | – | 0.02% | – |
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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% |