Vanguard Portfolio Management 13D and 13G filings for Arrowhead 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 |
| 2026-04-28 4:05 pm Purchase | 2026-03-31 | 13G | ARROWHEAD PHARMACEUTICALS INC ARWR | Vanguard Portfolio Management | 7,269,957 5.190% | 7,269,957 (New Position) | Filing |