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UPB
Jane Street’s
Upstream Bio, Inc. Common Stock
UPB
Stock Holding History
Jane Street’s Portfolio
UPB Stock Details
UPB Fund Activity
Bought
Maintained
Sold
Quarter
Market Value
Status
Shares
Shares
Change %
Capital Flow
Portfolio Weight
Portfolio Position
2025
Q1
–
Sell
-45,549
Closed
-$749K
–
6864
2024
Q4
$749K
Buy
+45,549
New
+$749K
﹤0.01%
3355
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Fund Activity
Fund Portfolios
Latest stock portfolios of the world's best investors and hedge funds
Fund Trends
Stocks ranked by hedge fund and large institutional investor activity
Large Buys & Sells
Recent large buys and sells by hedge funds and large institutional investors
Analyst Outlook
Analyst Upside
Stocks ranked by analyst price target upside potential
Latest Price Targets
Latest analyst price targets & ratings by research analysts
Analysts
Research analysts, their latest ratings and performance metrics
Analyst Firms
Research analyst firms, their latest ratings and performance metrics
WSR Indexes
Fund Manager Index
Stock index based on fund manager activity updated each quarter
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