Amphastar Pharmaceuticals shares owned by Marshall Wace
Quarter-by-quarter ownership of Amphastar Pharmaceuticals (AMPH) shares owned by Marshall Wace
from 13F filings
Historical chart of Marshall Wace investment in Amphastar Pharmaceuticals
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Quarterly reported holdings in Amphastar Pharmaceuticals by Marshall Wace
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $23M | 874k | 26.65 |
| 2025-06-30 | $20M | 849k | 22.96 |
| 2025-03-31 | $30M | 1.0M | 28.99 |
| 2024-12-31 | $23M | 609k | 37.13 |
| 2024-09-30 | $28M | 569k | 48.53 |
| 2024-06-30 | $9.1M | 227k | 40.00 |
| 2023-03-31 | $2.4M | 64k | 37.50 |
| 2022-09-30 | $890k | 32k | 28.13 |
| 2022-06-30 | $989k | 28k | 34.77 |
| 2022-03-31 | $625k | 17k | 35.88 |
| 2020-06-30 | $3.0M | 132k | 22.46 |
| 2020-03-31 | $4.5M | 302k | 14.84 |
| 2019-12-31 | $5.7M | 294k | 19.29 |
| 2019-09-30 | $8.2M | 413k | 19.83 |