RCM
SION

RA Capital Management’s Sionna Therapeutics, Inc. Common Stock SION Stock Holding History

RA Capital Management’s Portfolio SION Stock Details SION Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Shares
Change % 		Capital Flow Portfolio Weight Portfolio Position
2025
Q2 		$181M Hold
10,445,322
– – 3.05% 10
2025
Q1 		$109M Buy
+10,445,322
New +$109M 1.82% 12