SEC Filing Update: #SION Sionna Therapeutics, Inc. : $5.96

Sector: Healthcare | YTD: 🔽 -84.80% The SEC disclosed Today (21-SEP-2026) that RA CAPITAL MANAGEMENT has DECREASED #SION Shares by -34.62% 🔴 * Previous Holdings: 9.91M Shares * Current Holdings: 6.48M Shares * Decrease -3.43M * Decreased (%)-34.62% * Ownership: 14.3% https://www.thinksabio.com/reports/isr/SION Institutional ownership in #SION has been steadily rising over the past 4 quarters in Shares: Q3 2025: 42.84M Q4 2025: 43.95M Q1 2026: 45.41M Q2 2026: 46.72M 📈 Stay ahead of institutional buy/sell moves — Sign up free at ThinkSabio: Sign Up Free → 🐦 See this update on X: https://x.com/Thinksabio/status/2102175001004691695 RA Capital Management reduced its stake in Sion Pharmaceuticals from 9,905,045 shares to 6,476,193 shares, representing a 14.3% ownership position in the healthcare company.