Score Breakdown
Offering Ability
39
Cash Runway
25
Float Risk
35
Warrant Exposure
40
Convertible Debt
40
Dilution Forecast
☀️
Clear
No significant dilution signals
model est. 0%
No significant dilution signals detected for PRTA.
Market Data
Market Cap$532.96M
Shares Outstanding51.34M
Float36.75M
Cash$288.19M
Debt$7.65M
Short InterestN/A
Institutional Holdings
QoQ: ↑ 2.6% shares (2026Q1 vs prior)
187 institutional holders · 52.45M shares
#1
FMR LLC
7.55M shares
#2
Rubric Capital Management LP
5.00M shares
#3
BlackRock, Inc.
4.64M shares
+ 17 more holders Sign up free to view →
Institutional holder totals are aggregated from ownership filings and may use a different share basis or reporting date than public float. They are not a reconciliation against tradeable float.
Short Interest
Short Interest8.17M
Days to Cover14.0
% of Float22.2%
FINRA data as of Jul 31, 2026
Recent SEC Activity
Form 4
INSIDER TRANSACTION
2026-07-29
Form 4
INSIDER TRANSACTION
2026-07-29
Form 4
INSIDER TRANSACTION
2026-07-28
Form 4
INSIDER TRANSACTION
2026-07-28
Form 4
INSIDER TRANSACTION
2026-07-28
Full SEC filing analysis available with free account →
Recent News
No recent news
Factual PRTA Dilution Snapshot
Prothena Corporation plc (PRTA) has a DilutionScore of 38/100, rated Medium dilution risk. Score date: August 28, 2026.
- Recent SEC activity tracked for PRTA: Form 4 on 2026-07-29; Form 4 on 2026-07-29; Form 4 on 2026-07-28.
This automatically generated snapshot is assembled from stored DilutionWatch data fields and may contain data-source errors or omissions. It is not financial advice, not investment research, and not a recommendation. Do your own research and review the full disclaimer and terms of service.
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