Upstream Bio, Inc. - UPB
Ownership (Schedule 13D / 13G) · latest 50 filings
· Back to all files
Visible: 0
| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Nov 14, 2025 | SCHEDULE 13G/A | HBM Healthcare Investments (Cayman) Ltd. | 4.1% | 2,195,111 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | TCG Crossover GP I, LLC | 3.9% | 2,117,103 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | TCG Crossover Fund I, L.P. | 3.9% | 2,117,103 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | Chen Yu | 3.9% | 2,117,103 | View |
| Oct 24, 2025 | SCHEDULE 13G | Norges Bank | 5.3% | 2,882,647 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.