17 /100
LOW RISK
Score updated May 29, 2026

PRTA — Prothena Corporation plc Dilution Risk Tracker

Track PRTA 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
30
⚠️ Warrant Exposure
15
🔄Convertible Debt

🌦️ Dilution Forecast

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

Market Cap$522.49M
Shares Outstanding52.35M
Float36.75M
Cash$329.46M
Debt$7.65M
Short InterestN/A

🏛 Institutional Holdings

QoQ: ↑ 11.2% shares (2025Q4 vs prior)
181 institutional holders · 51.10M shares
#1 FMR LLC 7.55M shares
#2 BlackRock, Inc. 4.11M shares
#3 Rubric Capital Management LP 3.68M shares
+ 17 more holders Sign up free to view →

📉 Short Interest

Short Interest6.87M
Days to Cover18.3
% of Float18.7%
FINRA data as of Apr 30, 2026

📁 Recent SEC Activity

No recent SEC insights

📰 Recent News

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

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