Sionna Therapeutics, Inc. · NASDAQ:SION

Atlas Venture Fund XI, L.P. reported a 5.40% stake in Sionna Therapeutics, Inc. (Schedule 13D/A)

Event Oct 16, 2025 · Filed Oct 20, 2025

Atlas Venture Fund XI, L.P. reported a 5.40% stake in Sionna Therapeutics, Inc., 2,382,495 shares, with active intent on Oct 16, 2025. Filed Oct 20, 2025 (Schedule 13D/A).

Stake
5.40%
Shares
2,382,495
Intent
Active
What changed
Stake changed
Filed together
6 holders

The filing in full

HolderStakeShares
Atlas Venture Fund XI, L.P.5.40%2,382,495
Atlas Venture Associates XI, L.P.5.40%2,382,495
Atlas Venture Associates XI, LLC5.40%2,382,495
Atlas Venture Opportunity Fund II, L.P.1.60%701,985
Atlas Venture Associates Opportunity II, LP1.60%701,985
Atlas Venture Associates Opportunity II, LLC1.60%701,985

Source

View original at SEC

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