AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 211 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q4 2022. The put-call ratio across all filers is 0.20 and the average weighting 0.1%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $2,333 | +268.6% | 50,727 | +200.7% | 0.03% | +285.7% |
| Q1 2023 | $633 | +113.1% | 16,870 | +59.3% | 0.01% | +75.0% |
| Q4 2022 | $297 | -99.8% | 10,588 | +138.8% | 0.00% | +100.0% |
| Q3 2022 | $125,000 | -68.4% | 4,434 | -61.0% | 0.00% | -50.0% |
| Q2 2022 | $396,000 | -3.2% | 11,382 | -0.2% | 0.00% | +33.3% |
| Q1 2022 | $409,000 | -51.1% | 11,401 | -68.3% | 0.00% | -40.0% |
| Q4 2021 | $837,000 | -44.7% | 35,947 | -54.8% | 0.01% | -28.6% |
| Q3 2021 | $1,513,000 | +1398.0% | 79,603 | +1350.8% | 0.01% | +600.0% |
| Q1 2021 | $101,000 | -93.6% | 5,487 | -93.5% | 0.00% | -90.0% |
| Q3 2020 | $1,572,000 | +678.2% | 83,818 | +514.5% | 0.01% | +400.0% |
| Q1 2020 | $202,000 | +48.5% | 13,640 | +94.1% | 0.00% | +100.0% |
| Q4 2019 | $136,000 | -64.9% | 7,028 | -62.9% | 0.00% | -75.0% |
| Q1 2019 | $387,000 | +140.4% | 18,933 | +133.4% | 0.00% | +300.0% |
| Q4 2018 | $161,000 | 0.0% | 8,112 | -23.1% | 0.00% | 0.0% |
| Q2 2018 | $161,000 | -45.1% | 10,544 | -35.6% | 0.00% | -66.7% |
| Q3 2017 | $293,000 | +164.0% | 16,385 | +164.7% | 0.00% | +200.0% |
| Q2 2017 | $111,000 | -73.9% | 6,190 | -73.2% | 0.00% | -75.0% |
| Q4 2016 | $426,000 | – | 23,102 | – | 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% |