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 | $35,550 | -42.8% | 773 | -28.5% | 0.00% | – |
| Q2 2023 | $62,125 | -50.7% | 1,081 | -67.8% | 0.00% | – |
| Q1 2023 | $125,926 | +36.2% | 3,358 | +1.8% | 0.00% | – |
| Q4 2022 | $92,466 | +32.1% | 3,300 | +32.4% | 0.00% | – |
| Q3 2022 | $70,000 | 0.0% | 2,492 | +23.2% | 0.00% | – |
| Q2 2022 | $70,000 | +42.9% | 2,023 | +49.5% | 0.00% | – |
| Q1 2022 | $49,000 | +58.1% | 1,353 | +3.3% | 0.00% | – |
| Q4 2021 | $31,000 | +40.9% | 1,310 | +12.8% | 0.00% | – |
| Q3 2021 | $22,000 | -4.3% | 1,161 | 0.0% | 0.00% | – |
| Q2 2021 | $23,000 | +9.5% | 1,161 | 0.0% | 0.00% | – |
| Q1 2021 | $21,000 | -12.5% | 1,161 | -2.6% | 0.00% | – |
| Q4 2020 | $24,000 | +4.3% | 1,192 | 0.0% | 0.00% | – |
| Q3 2020 | $23,000 | -68.9% | 1,192 | -63.8% | 0.00% | – |
| Q2 2020 | $74,000 | +335.3% | 3,294 | +183.7% | 0.00% | – |
| Q1 2020 | $17,000 | -37.0% | 1,161 | -17.0% | 0.00% | – |
| Q4 2019 | $27,000 | +800.0% | 1,398 | +898.6% | 0.00% | – |
| Q1 2019 | $3,000 | -98.1% | 140 | -98.5% | 0.00% | -100.0% |
| Q2 2015 | $159,000 | +12.8% | 9,055 | -3.6% | 0.00% | 0.0% |
| Q1 2015 | $141,000 | +20.5% | 9,395 | -6.6% | 0.00% | – |
| Q4 2014 | $117,000 | – | 10,060 | – | 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% |