AVLSA
SION

Atlas Venture Life Science Advisors’s Sionna Therapeutics SION Stock Holding History

Atlas Venture Life Science Advisors’s Portfolio SION Stock Details SION Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		$64.1M Hold
2025
Q1 		$38.6M Buy