AI Upstream LLC 13D and 13G filings for Upstream Bio, 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 |
| 2024-10-22 4:06 pm Purchase | 2024-10-15 | 13D | Upstream Bio, Inc. UPB | AI Upstream LLC | 5,494,410 10.700% | 5,494,410 (New Position) | Filing |