AMPHASTAR PHARMACEUTICALS IN's ticker is AMPH and the CUSIP is 03209R103. A total of 135 filers reported holding AMPHASTAR PHARMACEUTICALS IN in Q1 2019. The put-call ratio across all filers is - and the average weighting 0.0%.
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 ↓ |
|---|---|---|---|
| Alambic Investment Management, L.P. | 29,423 | $583,000 | 0.44% |
| Matarin Capital Management, LLC | 223,184 | $4,426,000 | 0.34% |
| Summit Global Investments | 42,725 | $847,000 | 0.10% |
| FEDERATED HERMES, INC. | 1,747,921 | $34,661,000 | 0.08% |
| ROTHSCHILD & CO ASSET MANAGEMENT US INC. | 347,307 | $6,887,000 | 0.08% |
| MARSHALL WACE, LLP | 413,293 | $8,196,000 | 0.06% |
| BOSTON ADVISORS LLC | 42,365 | $840,000 | 0.04% |
| MARTINGALE ASSET MANAGEMENT L P | 214,444 | $4,254,000 | 0.04% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 177,321 | $3,516,000 | 0.04% |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 231,041 | $4,582,000 | 0.04% |