The Vanguard Group 13D and 13G filings for Altimmune, 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 |
| 2026-01-30 1:25 pm Purchase | 2025-12-31 | 13G | Altimmune, Inc. ALT | The Vanguard Group | 9,491,159 9.090% | 5,919,187 (+165.71%) | Filing |
| 2024-02-13 4:58 pm Purchase | 2023-12-29 | 13G | Altimmune, Inc. ALT | The Vanguard Group | 3,571,972 6.650% | 1,039,552 (+41.05%) | Filing |
| 2023-02-09 11:07 am Purchase | 2022-12-30 | 13G | Altimmune, Inc. ALT | The Vanguard Group | 2,532,420 5.150% | 2,532,420 (New Position) | Filing |