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 | ||||
|---|---|---|---|---|---|---|
| Q2 2023 | $22,643 | +503.8% | 394 | +294.0% | 0.00% | – |
| Q1 2023 | $3,750 | -97.2% | 100 | -97.4% | 0.00% | – |
| Q2 2022 | $133,000 | +47.8% | 3,826 | +53.0% | 0.00% | – |
| Q1 2022 | $90,000 | +4400.0% | 2,500 | +2400.0% | 0.00% | – |
| Q2 2021 | $2,000 | -85.7% | 100 | -87.5% | 0.00% | – |
| Q2 2017 | $14,000 | -39.1% | 801 | -50.0% | 0.00% | – |
| Q1 2017 | $23,000 | -4.2% | 1,601 | +23.1% | 0.00% | – |
| Q4 2016 | $24,000 | – | 1,301 | – | 0.00% | – |
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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% |