AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 130 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2020. The put-call ratio across all filers is - and the average weighting 0.0%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q2 2023 | $11 | +57.1% | 196 | -29.7% | 0.00% | – |
| Q4 2022 | $7 | -100.0% | 279 | -65.1% | 0.00% | – |
| Q3 2021 | $16,000 | 0.0% | 800 | 0.0% | 0.00% | – |
| Q2 2021 | $16,000 | +45.5% | 800 | +27.4% | 0.00% | – |
| Q3 2020 | $11,000 | +450.0% | 628 | +528.0% | 0.00% | – |
| Q2 2020 | $2,000 | -80.0% | 100 | -81.9% | 0.00% | – |
| Q3 2019 | $10,000 | -44.4% | 552 | -35.9% | 0.00% | – |
| Q2 2019 | $18,000 | +80.0% | 861 | +65.9% | 0.00% | – |
| Q4 2018 | $10,000 | +25.0% | 519 | +15.1% | 0.00% | – |
| Q3 2018 | $8,000 | +60.0% | 451 | +19.9% | 0.00% | – |
| Q2 2018 | $5,000 | -85.7% | 376 | -81.0% | 0.00% | -100.0% |
| Q3 2017 | $35,000 | -30.0% | 1,975 | -30.6% | 0.00% | -50.0% |
| Q2 2017 | $50,000 | -81.9% | 2,844 | -80.6% | 0.00% | -89.5% |
| Q3 2016 | $277,000 | – | 14,629 | – | 0.02% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| LAM GROUP, INC. | 130,250 | $3,649,605 | 3.75% |
| SHAKER INVESTMENTS LLC/OH | 81,287 | $2,277,662 | 1.41% |
| Mesirow Institutional Investment Management, Inc. | 374,414 | $10,491,080 | 1.38% |
| OBERWEIS ASSET MANAGEMENT INC/ | 134,000 | $3,754,680 | 0.80% |
| Portolan Capital Management | 270,791 | $7,587,564 | 0.75% |
| Hillsdale Investment Management Inc. | 172,238 | $4,826,109 | 0.41% |
| Capital Impact Advisors, LLC | 14,669 | $411,025 | 0.40% |
| Watershed Asset Management, L.L.C. | 9,555 | $267,731 | 0.34% |
| Quantedge Capital Pte Ltd | 35,153 | $984,987 | 0.33% |
| FEDERATED HERMES, INC. | 3,284,217 | $92,023,760 | 0.25% |