19 /100
LOW RISK
Score updated May 29, 2026

SION — Sionna Therapeutics, Inc. Dilution Risk Tracker

Track SION dilution risk with DilutionWatch's stock tracker. DilutionScore™ measures dilution risk across 5 factors — lower scores indicate higher risk of share dilution.

⚠️ Not financial advice. Do your own research before making any investment decisions.

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📊 Score Breakdown

📋 Offering Ability
20
💰 Cash Runway
0
📊 Float Risk
65
⚠️ Warrant Exposure
15
🔄Convertible Debt

🌦️ Dilution Forecast

☀️
Clear
No significant dilution signals
0%
No significant dilution signals detected for SION.
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💹 Market Data

Market Cap$1.93B
Shares Outstanding45.15M
Float16.80M
Cash$216.15M
Debt$8.38M
Short InterestN/A

🏛 Institutional Holdings

QoQ: ↓ 2.0% shares (2025Q4 vs prior)
100 institutional holders · 43.98M shares
#1 RA CAPITAL MANAGEMENT, L.P. 9.91M shares
#2 TPG GP A, LLC 6.74M shares
#3 ORBIMED ADVISORS LLC 3.56M shares
+ 17 more holders Sign up free to view →

📉 Short Interest

Short Interest4.23M
Days to Cover9.3
% of Float25.2%
FINRA data as of Apr 30, 2026

📁 Recent SEC Activity

xbrl XBRL CONVERTIBLE Dec 31, 2025
Full SEC filing analysis available with free account

📰 Recent News

No recent news
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🔬 More Research for SION
📊 SION FDA Catalyst Timeline & Biotech Grade — BiotechSigns 📡 SION Signal Convergence & Dark Pool Activity — StonkWhisper

Part of the Guerilla Finance research network. Cross-reference multiple data sources for better due diligence.