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PRTA

$9.02-3.01%

PROTHENA CORP PUBLIC LTD CO

Market Cap
$490M
Sector
Materials
Industry
Biotechnology
Beta
-0.22
5yr monthly vs SPY
Price Chart
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Signals

Insider Velocity
24.9x
buying
Congress
—
recent trades
Short Volume
74%
W/W -13.9pp

Market & Alt Data

News
8
recent articles
Activist
13D
EcoR1
Analyst Consensus
Buy
12 analysts

Buy Activity

Buy Velocity Score
24.85x
Current Rate (90d)
2883.33/mo
Baseline Rate
0.00/mo
Unique Buyers (90d)
2

Sell Activity

Sell Velocity Score
24.85x
Sell Rate (90d)
178.31/mo
Sell Baseline
0.00/mo
Unique Sellers (90d)
2
Sort by
Type
Trade DateFiledOwnerRoleTypeSharesPriceValueOwned After
2026-09-022026-09-03SCULLY WILLIAM P10% OwnerPurchase27.0K$9.47$256K827.0KView
2026-08-202026-08-21SCULLY WILLIAM P10% OwnerPurchase50.0K$8.79$439K800.0KView
2026-08-072026-08-10SCULLY WILLIAM P10% OwnerPurchase37.5K$8.62$323K790.0KView
2026-07-292026-07-30Kingston Anne EvansChief Strategy OfficerSale7,662$8.47$65K55.8KView
2026-07-292026-07-30Isaacs Michael JohnGeneral Counsel & Company Sec.Sale8,386$8.47$71K35.7KView
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Recent News

Prothena to Participate in the H.C. Wainwright 28th Annual Global Investment Conference
Yahoo · 2026-09-09
Real Parkinson’s Disease Hope from Jupiter Neurosciences
Yahoo · 2026-08-19
KMDA or PRTA: Which Is the Better Value Stock Right Now?
Yahoo · 2026-08-14
PRTA's Q2 Loss Narrower Than Expected, Pipeline Progress in Focus
Yahoo Finance · 2026-08-07

Informational purposes only, not investment advice.

Prothena (PRTA) Reports Q2 Loss, Misses Revenue Estimates
Yahoo Finance · 2026-08-06
Prothena to Report Second Quarter 2026 Financial Results on August 6
Yahoo Finance · 2026-07-30
Earnings Beat: Prothena Corporation plc Just Beat Analyst Forecasts, And Analysts Have Been Updating Their Models
Yahoo Finance · 2026-05-11
Prothena Posts Q1 Earnings as Revenues Surge on Milestone Payment
Yahoo Finance · 2026-05-08

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