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SEC FORM 4
$252,148.00

Sionna Therapeutics, Inc. (SION)

Sale of 33,800 shares at $7.46 per share.

Reporting Persons RA CAPITAL MANAGEMENT, L.P. · RA Capital Healthcare Fund LP · RA Capital Nexus Fund, L.P. · RA Capital Nexus Fund III, L.P. · Kolchinsky Peter · Shah Rajeev M. · Transaction Code S

Traded Sep 17, 2026 · Disclosed Sep 21, 2026

Source: SEC Form 4 · 0001231919-26-001201 · filed 2026-09-21 · View filing →

Composed from the Form 4 as filed with the SEC. Share counts, prices and dates are the filing's own; the disclosure lag is counted in business days from the transaction date to the filing date. What is a Form 4?

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Desq Long. "Sionna Therapeutics, Inc. (SION)." Disclosed 2026-09-21. https://desqlong.com/cards/0001231919-26-001201-2 (retrieved 2026-09-26).