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 | $61,719 | -77.4% | 1,342 | -71.7% | 0.01% | -83.8% |
| Q2 2023 | $272,580 | +630.5% | 4,743 | +376.7% | 0.08% | +566.7% |
| Q1 2023 | $37,313 | -65.3% | 995 | -74.1% | 0.01% | -66.7% |
| Q4 2022 | $107,457 | +76.2% | 3,835 | +77.0% | 0.04% | +20.0% |
| Q3 2022 | $61,000 | -14.1% | 2,167 | +5.6% | 0.03% | -31.8% |
| Q2 2022 | $71,000 | -37.7% | 2,053 | -35.3% | 0.04% | -22.8% |
| Q1 2022 | $114,000 | +90.0% | 3,172 | +22.8% | 0.06% | +103.6% |
| Q4 2021 | $60,000 | – | 2,584 | – | 0.03% | – |
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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% |