AVLSA
SION

Atlas Venture Life Science Advisors’s Sionna Therapeutics, Inc. Common Stock SION Stock Holding History

Atlas Venture Life Science Advisors’s Portfolio SION Stock Details SION Fund Activity
Quarter Market Value Status Shares Shares
Change % 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		$64.1M Hold
3,694,020
– – 9.68% 4
2025
Q1 		$38.6M Buy
+3,694,020
New +$38.6M 7.41% 5