8.55
price up icon4.14%   0.34
after-market After Hours: 8.55
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Prothena Corporation Plc stock is traded at $8.55, with a volume of 1.12M. It is up +4.14% in the last 24 hours and up +21.62% over the past month. Prothena Corp PLC is a clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. The company's clinical pipeline of antibody-based product candidates targets a range of indications, including Amyloid Light-chain (AL) amyloidosis (NEOD001), Parkinson's disease and other related synucleinopathies (PRX002), and inflammatory diseases, including ATTR amyloidosis [Coramitug (PRX004)], Alzheimer's disease (PRX123), Neurodegeneration (PRXPRX019), and Others.
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Previous Close:
$8.21
Open:
$8.24
24h Volume:
1.12M
Relative Volume:
0.90
Market Cap:
$460.25M
Revenue:
$217.25M
Net Income/Loss:
$-50.92M
P/E Ratio:
-8.55
EPS:
-1
Net Cash Flow:
$-100.85M
1W Performance:
+4.27%
1M Performance:
+21.62%
6M Performance:
-42.81%
1Y Performance:
-58.78%
1-Day Range:
Value
$8.21
$8.585
1-Week Range:
Value
$8.06
$8.585
52-Week Range:
Value
$4.32
$22.71

Prothena Corporation Plc Stock (PRTA) Company Profile

Name
Name
Prothena Corporation Plc
Name
Phone
011-353-1-236-2500
Name
Address
77 SIR JOHN ROGERSON'S QUAY, BLOCK C, DUBLIN 2
Name
Employee
163
Name
Twitter
@ProthenaCorp
Name
Next Earnings Date
2025-02-18
Name
Latest SEC Filings
Name
PRTA's Discussions on Twitter

Compare PRTA with other stocks

Stocks Price Market Cap Revenue Net Income Cash Flow EPS
Biotechnology icon
PRTA
Prothena Corporation Plc
8.55 441.94M 217.25M -50.92M -100.85M -1.00
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Vertex Pharmaceuticals Inc
396.12 101.77B 11.39B 3.64B 3.50B 13.99
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REGN
Regeneron Pharmaceuticals Inc
573.38 60.12B 14.21B 4.46B 3.56B 39.68
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ALNY
Alnylam Pharmaceuticals Inc
452.00 59.45B 2.46B -319.09M -52.09M -2.47
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ARGX
Argen X Se Adr
750.78 44.90B 3.06B 1.28B 447.35M 21.30
Biotechnology icon
ONC
Beone Medicines Ltd Adr
341.80 35.07B 3.81B -644.79M -669.77M -6.24

Prothena Corporation Plc Stock (PRTA) Upgrades & Downgrades

Date Action Analyst Rating Change
May-28-25 Downgrade BofA Securities Neutral → Underperform
May-27-25 Downgrade Cantor Fitzgerald Overweight → Neutral
May-27-25 Downgrade Jefferies Buy → Hold
May-27-25 Downgrade Oppenheimer Outperform → Perform
Dec-20-24 Initiated Chardan Capital Markets Buy
Jan-30-24 Downgrade BofA Securities Buy → Neutral
Dec-12-23 Initiated Deutsche Bank Buy
Apr-24-23 Initiated SVB Securities Outperform
Jan-27-23 Initiated Piper Sandler Overweight
Nov-04-22 Downgrade RBC Capital Mkts Outperform → Sector Perform
Sep-28-22 Upgrade BofA Securities Neutral → Buy
Nov-19-21 Initiated JMP Securities Mkt Outperform
Jun-18-21 Upgrade BofA Securities Underperform → Neutral
Jun-08-21 Reiterated Oppenheimer Outperform
May-26-21 Initiated Citigroup Buy
Feb-26-21 Upgrade RBC Capital Mkts Sector Perform → Outperform
Feb-12-21 Upgrade Jefferies Hold → Buy
Feb-02-21 Upgrade BTIG Research Neutral → Buy
Dec-07-20 Initiated H.C. Wainwright Buy
Jul-09-20 Upgrade Oppenheimer Perform → Outperform
Nov-19-19 Upgrade Evercore ISI In-line → Outperform
May-21-18 Downgrade Barclays Equal Weight → Underweight
Apr-23-18 Downgrade Jefferies Buy → Hold
Apr-05-18 Reiterated Barclays Overweight
Nov-20-17 Downgrade Wedbush Outperform → Neutral
Sep-29-17 Reiterated BTIG Research Buy
Sep-15-17 Initiated RBC Capital Mkts Outperform
Aug-17-17 Initiated Evercore ISI Outperform
Jul-11-17 Initiated Jefferies Buy
Apr-12-17 Initiated Cantor Fitzgerald Overweight
Apr-12-17 Initiated Piper Jaffray Overweight
Mar-02-17 Initiated Instinet Buy
Dec-21-16 Initiated SunTrust Buy
Nov-03-16 Initiated Deutsche Bank Buy
Aug-04-16 Reiterated Barclays Overweight
May-13-16 Initiated Barclays Overweight
Feb-19-16 Reiterated Wedbush Outperform
Jan-21-16 Initiated Credit Suisse Outperform
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Prothena Corporation Plc Stock (PRTA) Latest News

pulisher
Sep 06, 2025

What high frequency data says about Prothena Corporation plcJuly 2025 Decliners & Community Consensus Picks - Newser

Sep 06, 2025
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Sep 06, 2025

Chart overlay techniques for tracking Prothena Corporation plcSell Signal & Stock Market Timing Techniques - Newser

Sep 06, 2025
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Sep 06, 2025

Will Prothena Corporation plc outperform its industry peers2025 Retail Activity & Low Risk High Win Rate Stock Picks - خودرو بانک

Sep 06, 2025
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Sep 06, 2025

Invesco Ltd. Trims Stock Holdings in Prothena Corporation plc $PRTA - Defense World

Sep 06, 2025
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Sep 05, 2025

What to do if you’re stuck in Prothena Corporation plcJuly 2025 Market Mood & High Accuracy Trade Signal Alerts - Newser

Sep 05, 2025
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Sep 05, 2025

Prothena Corporation plc stock outlook for YEAREarnings Overview Report & Stepwise Entry/Exit Trade Alerts - Newser

Sep 05, 2025
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Sep 05, 2025

Market Rankings: Can Prothena Corporation plc navigate macro headwindsJuly 2025 Big Picture & Free Verified High Yield Trade Plans - خودرو بانک

Sep 05, 2025
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Sep 05, 2025

Relative strength of Prothena Corporation plc in sector analysisBreakout Watch & Verified Technical Trade Signals - Newser

Sep 05, 2025
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Sep 04, 2025

Can swing trading help recover from Prothena Corporation plc lossesTrade Entry Report & Reliable Price Breakout Signals - Newser

Sep 04, 2025
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Sep 04, 2025

Will Prothena Corporation plc price bounce be sustainableJuly 2025 Patterns & Risk Controlled Stock Pick Alerts - Newser

Sep 04, 2025
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Sep 03, 2025

Applying Wyckoff theory to Prothena Corporation plc stockJuly 2025 Outlook & Technical Pattern Based Buy Signals - Newser

Sep 03, 2025
pulisher
Sep 03, 2025

Can Prothena Corporation plc lead its sector in growthJuly 2025 Levels & Free Technical Pattern Based Buy Signals - khodrobank.com

Sep 03, 2025
pulisher
Sep 03, 2025

Prothena (PRTA) Up 17.6% Since Last Earnings Report: Can It Continue? - Yahoo Finance

Sep 03, 2025
pulisher
Sep 03, 2025

Published on: 2025-09-03 09:24:25 - Newser

Sep 03, 2025
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Sep 03, 2025

Can Prothena Corporation plc benefit from deglobalizationJuly 2025 Macro Moves & Verified Swing Trading Watchlist - خودرو بانک

Sep 03, 2025
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Sep 03, 2025

Best data tools to analyze Prothena Corporation plc stockJuly 2025 Momentum & Community Consensus Picks - Newser

Sep 03, 2025
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Sep 03, 2025

Can Prothena Corporation plc deliver alphaEarnings Growth Report & Proven Capital Preservation Methods - خودرو بانک

Sep 03, 2025
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Sep 03, 2025

Screener Results Flag Prothena Corporation plc as Oversold2025 Historical Comparison & Weekly Hot Stock Watchlists - beatles.ru

Sep 03, 2025
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Sep 02, 2025

How do insiders feel about Prothena Corporation plcJuly 2025 Technicals & Free Weekly Watchlist of Top Performers - خودرو بانک

Sep 02, 2025
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Sep 02, 2025

Is Prothena Corporation plc a turnaround storyJuly 2025 Snapshot & Free Safe Entry Trade Signal Reports - خودرو بانک

Sep 02, 2025
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Sep 02, 2025

How institutional ownership impacts Prothena Corporation plc stockJuly 2025 Chart Watch & Free Reliable Trade Execution Plans - Newser

Sep 02, 2025
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Sep 02, 2025

Is Prothena Corporation plc showing insider buyingBear Alert & Reliable Entry Point Trade Alerts - خودرو بانک

Sep 02, 2025
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Sep 01, 2025

Is Prothena Corporation plc exposed to political riskWeekly Trade Recap & Daily Technical Stock Forecast Reports - خودرو بانک

Sep 01, 2025
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Aug 31, 2025

Tick level data insight on Prothena Corporation plc volatilityJuly 2025 News Drivers & Entry and Exit Point Strategies - Newser

Aug 31, 2025
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Aug 31, 2025

Prothena Corporation plc Chart Enters High Volatility ZoneVolume Spike & Weekly Breakout Opportunity Watchlist - beatles.ru

Aug 31, 2025
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Aug 31, 2025

Can technical indicators confirm Prothena Corporation plc’s reversalIPO Watch & Free Weekly Chart Analysis and Trade Guides - Newser

Aug 31, 2025
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Aug 31, 2025

Multi factor analysis applied to Prothena Corporation plcQuarterly Investment Review & Low Risk Investment Opportunities - Newser

Aug 31, 2025
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Aug 31, 2025

Will a bounce in Prothena Corporation plc offer an exitJuly 2025 Volume & AI Driven Stock Reports - Newser

Aug 31, 2025
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Aug 31, 2025

Live Scanner Shows Breakout on Prothena Corporation plcPortfolio Gains Report & Fast Gain Stock Tips - beatles.ru

Aug 31, 2025
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Aug 30, 2025

Prothena Corporation plc Breaks Losing Streak — Is the Trend Reversing getLinesFromResByArray error: size == 0 - 강소기업뉴스

Aug 30, 2025
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Aug 30, 2025

Using data models to predict Prothena Corporation plc stock movementWeekly Risk Summary & Daily Oversold Stock Bounce Ideas - Newser

Aug 30, 2025
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Aug 30, 2025

Is Prothena Corporation plc still worth holding after the dipSwing Trade & Weekly Top Performers Watchlists - Newser

Aug 30, 2025
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Aug 29, 2025

Ranking Prothena Corporation plc among high performing stocks via toolsWeekly Risk Report & Target Return Focused Picks - Newser

Aug 29, 2025
pulisher
Aug 29, 2025

FDA Tightens Safety Guidelines For Biogen Leqembi Alzheimer's Therapy - Benzinga

Aug 29, 2025

Prothena Corporation Plc Stock (PRTA) Financials Data

Revenue

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Net Income

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Cash Flow

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EPS

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$86.64
price up icon 1.40%
$27.54
price up icon 0.58%
$25.98
price up icon 9.16%
$112.46
price up icon 8.66%
$145.10
price up icon 1.80%
biotechnology ONC
$341.80
price up icon 7.24%
Cap:     |  Volume (24h):