Upstream Bio shares owned by Dr. Jeffrey R. Jay, M.D.
Quarter-by-quarter ownership of Upstream Bio (UPB) shares owned by Dr. Jeffrey R. Jay, M.D.
from 13F filings
Historical chart of Dr. Jeffrey R. Jay, M.D. investment in Upstream Bio
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Quarterly reported holdings in Upstream Bio by Dr. Jeffrey R. Jay, M.D.
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $5.6M | 300k | 18.81 |
| 2025-06-30 | $3.3M | 300k | 10.98 |
| 2025-03-31 | $1.8M | 300k | 6.12 |
| 2024-12-31 | $4.9M | 300k | 16.44 |