Upstream Bio shares owned by Siren
Historical chart of Siren investment in Upstream Bio
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All positions including Upstream Bio held by Siren consolidated in one spreadsheet with up to 7 years of data
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Quarterly reported holdings in Upstream Bio by Siren
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $15M | 789k | 18.81 |
| 2025-06-30 | $8.7M | 789k | 10.98 |
| 2025-03-31 | $4.8M | 789k | 6.12 |
| 2024-12-31 | $13M | 800k | 16.44 |