SL
UPB

Siren LLC’s Upstream Bio, Inc. Common Stock UPB Stock Holding History

Siren LLC’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
Q2 		$8.66M Hold
788,450
– – 0.45% 46
2025
Q1 		$4.83M Sell
788,450
-11,550
-1% -$70.7K 0.27% 55
2024
Q4 		$13.2M Buy
+800,000
New +$13.2M 0.58% 41