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 | ||||
|---|---|---|---|---|---|---|
| Q4 2022 | $3 | -100.0% | 18 | -80.6% | 0.00% | – |
| Q3 2022 | $6,000 | -14.3% | 93 | -48.0% | 0.00% | – |
| Q2 2022 | $7,000 | 0.0% | 179 | 0.0% | 0.00% | – |
| Q1 2022 | $7,000 | -75.0% | 179 | -87.3% | 0.00% | -100.0% |
| Q4 2018 | $28,000 | +3.7% | 1,410 | 0.0% | 0.00% | +100.0% |
| Q3 2018 | $27,000 | +35.0% | 1,410 | +7.6% | 0.00% | 0.0% |
| Q2 2018 | $20,000 | +233.3% | 1,310 | +322.6% | 0.00% | – |
| Q1 2018 | $6,000 | 0.0% | 310 | 0.0% | 0.00% | – |
| Q4 2017 | $6,000 | -78.6% | 310 | -80.1% | 0.00% | -100.0% |
| Q3 2017 | $28,000 | – | 1,560 | – | 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% |