CUSIP 03209R103COMAMPHQ4 2025
25 filings · latest Oct 17, 2025
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 5.46M | $146.27M |
| 2 | Vanguard Group Inc | 2.61M | $69.85M |
| 3 | Td Asset Management Inc | 1.96M | $52.57M |
| 4 | Dimensional Fund Advisors LP | 1.80M | $48.20M |
| 5 | State Street Corp | 1.53M | $41.02M |
| 6 | Fuller & Thaler Asset Management, Inc. | 1.39M | $37.34M |
| 7 | Marshall Wace, LLP | 1.24M | $33.13M |
| 8 | Epoch Investment Partners, Inc. | 1.13M | $30.17M |
| 9 |
| 4 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 5.9% | 2.81M | SEC |
| 5 | Feb 9, 2024 | Zhang Jack Y. | 13G/A | 26.2% | 13.44M | SEC |
| 6 | Jan 23, 2024 | Blackrock Inc. | 13G/A | 12.6% | 6.04M | SEC |
| 7 | Jan 17, 2024 | Federated Hermes, Inc. | 13G/A | 6.8% | 3.27M | SEC |
| 8 | Feb 9, 2023 | Vanguard Group Inc | 13G/A | 5.4% | 2.62M | SEC |
| 9 | Feb 1, 2023 | Federated Hermes, Inc. | 13G/A | 6.8% | 3.28M | SEC |
| 10 | Jan 27, 2023 | Zhang Jack Y. | 13G/A | 25.5% | 13.11M | SEC |
See the full Schedule 13D/13G history for Amphastar Pharmaceuticals In.
Unlock full history| Boston Trust Walden Corp |
| 1.09M |
| $29.12M |
| 10 | Geode Capital Management, LLC | 886.8K | $23.75M |