Sionna Therapeutics, Inc. · NASDAQ:SION

Ra Capital Management, L.P. reported a 14.30% stake in Sionna Therapeutics, Inc. (Schedule 13D/A)

Event Sep 17, 2026 · Filed Sep 21, 2026

Ra Capital Management, L.P. reported a 14.30% stake in Sionna Therapeutics, Inc., 6,476,193 shares, with active intent on Sep 17, 2026. Filed Sep 21, 2026 (Schedule 13D/A).

Stake
14.30%
Shares
6,476,193
Intent
Active
What changed
Stake changed
Filed together
5 holders

The filing in full

HolderStakeShares
RA Capital Management, L.P.14.30%6,476,193
Peter Kolchinsky14.30%6,476,193
Rajeev Shah14.30%6,476,193
RA Capital Healthcare Fund, L.P.7.60%3,448,812
RA Capital Nexus Fund III, L.P.4.90%2,198,082

Source

View original at SEC

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