Form 4 Filing: RA CAPITAL MANAGEMENT, L.P. Acquires (Grant) shares of $SION

STOCK AWARD / GRANT

⚡ MATERIALITY: 1/10

corporate issuer

Sionna Therapeutics, Inc.

Ticker: $SION

Transaction Value

N/A (Non-Open-Market)

Price/Share: $0.00 (Non-Open-Market)

transaction date

2026-06-17

Shares: 17,340

Market Price Activity

HillSignal AI Analytical Report

SEC Form 4 documents direct changes in beneficial ownership of securities for public corporations. The reporting insider, RA CAPITAL MANAGEMENT, L.P., holds the title of Director at Sionna Therapeutics, Inc..

On 2026-06-17, the insider transacted 17,340 shares.This transaction is a non-open-market event (such as a stock grant or option exercise) with a reported price per share of $0.00.

Executive Summary Summary

RA CAPITAL MANAGEMENT, L.P. (Director) was granted $0 of $SION

Post-Transaction Position: 17,340 shares

SEC Accession No: 0001231919-26-000674 (CIK: 1346824)

Verified Multi-Source Index

Verify the accuracy of this insider transaction and corporate entity independently. HillSignal pulls data directly from official SEC databases; use the sources below to corroborate.

SEC EDGAR FilingView Source Form 4

Yahoo Finance$SION Quote & Profile

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Google News$SION News Coverage