Dimensional Fund Advisors LP 13D and 13G filings for Amphastar Pharmaceuticals, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-07-14 1:27 pm Purchase | 2026-06-30 | 13G | AMPHASTAR PHARMACEUTICALS INC AMPH | Dimensional Fund Advisors LP | 2,305,107 5.200% | 2,305,107 (New Position) | Filing |