4.59
price down icon2.34%   -0.11
after-market After Hours: 4.70 0.11 +2.40%
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Prothena Corporation Plc stock is traded at $4.59, with a volume of 1.96M. It is down -2.34% in the last 24 hours and down -52.63% 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:
$4.70
Open:
$4.6
24h Volume:
1.96M
Relative Volume:
1.61
Market Cap:
$247.08M
Revenue:
$217.25M
Net Income/Loss:
$-50.92M
P/E Ratio:
-4.59
EPS:
-1
Net Cash Flow:
$-100.85M
1W Performance:
-30.24%
1M Performance:
-52.63%
6M Performance:
-71.68%
1Y Performance:
-77.29%
1-Day Range:
Value
$4.4216
$4.70
1-Week Range:
Value
$4.32
$5.35
52-Week Range:
Value
$4.32
$25.42

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

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Prothena Corporation Plc
4.59 354.18M 217.25M -50.92M -100.85M -1.00
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VRNA
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REGN
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490.28 63.52B 14.09B 4.50B 2.96B 39.28

Prothena Corporation Plc Stock (PRTA) Upgrades & Downgrades

Date Action Analyst Rating Change
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
View All

Prothena Corporation Plc Stock (PRTA) Latest News

pulisher
May 31, 2025

Piper Sandler Reduces Prothena (PRTA) Price Target to $81 from $110 Following AFFIRM-AL Trial Discontinuation - MSN

May 31, 2025
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May 31, 2025

Prothena Co. plc (NASDAQ:PRTA) Given Consensus Recommendation of “Hold” by Brokerages - Defense World

May 31, 2025
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May 31, 2025

Chardan Capital Decreases Earnings Estimates for Prothena - Defense World

May 31, 2025
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May 30, 2025

Citizens JMP Slashes Prothena (PRTA) to $29 from $78 After AFFIRM-AL Trial Fails - MSN

May 30, 2025
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May 30, 2025

Chardan Lowers Prothena (PRTA) Price Target Following AFFIRM-AL Trial Failure - Insider Monkey

May 30, 2025
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May 30, 2025

FY2027 EPS Estimates for Prothena Decreased by HC Wainwright - Defense World

May 30, 2025
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May 30, 2025

Prothena (NASDAQ:PRTA) Given “Underperform” Rating at Bank of America - Defense World

May 30, 2025
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May 29, 2025

Bank of America Reiterates “Underperform” Rating for Prothena (NASDAQ:PRTA) - Defense World

May 29, 2025
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May 29, 2025

Prothena (NASDAQ:PRTA) Earns “Underperform” Rating from Bank of America - Defense World

May 29, 2025
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May 29, 2025

The Prothena Corporation plc (NASDAQ:PRTA) Analysts Have Been Trimming Their Sales Forecasts - simplywall.st

May 29, 2025
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May 29, 2025

BofA cuts Prothena stock rating, slashes target to $4 By Investing.com - Investing.com Nigeria

May 29, 2025
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May 28, 2025

Prothena Corp (PRTA) Sees Downgrade and Price Target Cut by B of A Securities | PRTA Stock News - GuruFocus

May 28, 2025
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May 28, 2025

Oppenheimer Downgrades Prothena Corporation (NASDAQ:PRTA) to Perform from Outperform - Insider Monkey

May 28, 2025
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May 28, 2025

BofA Securities Downgrades Prothena to Underperform From Neutral, $4 Price Target - marketscreener.com

May 28, 2025
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May 28, 2025

Prothena (PRTA) Faces Downgrade After Clinical Trial Setback | P - GuruFocus

May 28, 2025
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May 28, 2025

Prothena (PRTA) Faces Downgrade After Clinical Trial Setback | PRTA Stock News - GuruFocus

May 28, 2025
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May 28, 2025

Prothena's Late-Stage Study for AL Amyloidosis Fails, Stock Down - MSN

May 28, 2025
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May 28, 2025

Prothena (PRTA) Downgraded by BofA Analyst with Lower Price Target | PRTA Stock News - GuruFocus

May 28, 2025
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May 28, 2025

Prothena (NASDAQ:PRTA) Price Target Lowered to $81.00 at Piper Sandler - Defense World

May 28, 2025
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May 28, 2025

Prothena (NASDAQ:PRTA) Price Target Cut to $29.00 by Analysts at JMP Securities - Defense World

May 28, 2025
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May 28, 2025

Prothena (NASDAQ:PRTA) Lowered to Hold Rating by Jefferies Financial Group - Defense World

May 28, 2025
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May 28, 2025

Prothena (NASDAQ:PRTA) Given New $14.00 Price Target at HC Wainwright - Defense World

May 28, 2025
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May 28, 2025

Traders Purchase High Volume of Put Options on Prothena (NASDAQ:PRTA) - Defense World

May 28, 2025
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May 27, 2025

Prothena (PRTA) Shares Plunge After Key Trial Setback - GuruFocus

May 27, 2025
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May 27, 2025

Prothena: Despite Phase 3 Trial Failure, Other Neurodegenerative Programs In Place (PRTA) - Seeking Alpha

May 27, 2025
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May 27, 2025

Peninsula biotech Prothena falters — again — and layoffs are on the waySan Francisco Business Times - The Business Journals

May 27, 2025
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May 27, 2025

Prothena Shares Fall, Stock Downgraded by Multiple Research Firms After Birtamimab Development Discontinued - marketscreener.com

May 27, 2025
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May 27, 2025

Prothena Corp (PRTA) Downgraded by Oppenheimer | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Jefferies Downgrades Prothena Corporation (PRTA) After Negative Trial Results - Insider Monkey

May 27, 2025
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May 27, 2025

Prothena stock hits 52-week low amid downgrades (PRTA:NASDAQ) - Seeking Alpha

May 27, 2025
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May 27, 2025

Prothena Corp (PRTA) Sees Target Price Reduction by Piper Sandler | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Piper Sandler cuts Prothena stock target to $81 from $110 By Investing.com - Investing.com UK

May 27, 2025
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May 27, 2025

PTC Therapeutics To Rally Around 61%? Here Are 10 Top Analyst Forecasts For Tuesday - Benzinga

May 27, 2025
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May 27, 2025

Cantor Fitzgerald cuts Prothena stock rating to Neutral By Investing.com - Investing.com UK

May 27, 2025
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May 27, 2025

Prothena Corp (PRTA) Target Price Slashed by JMP Securities | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Prothena (PRTA) Downgraded Following Unsuccessful Phase 3 Trial | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Expert Outlook: Prothena Corp Through The Eyes Of 5 Analysts - Benzinga

May 27, 2025
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May 27, 2025

Prothena Corp (PRTA) Analyst Update: Price Target Significantly Lowered | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Why Is Prothena Stock Trading Lower On Tuesday? - Benzinga

May 27, 2025
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May 27, 2025

Jefferies Downgrades Prothena to Hold From Buy, Adjusts Price Target to $6 From $32 - marketscreener.com

May 27, 2025
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May 27, 2025

Prothena Corp (PRTA) Price Target Lowered by HC Wainwright & Co. | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Prothena stock price target cut to $14 at H.C. Wainwright By Investing.com - Investing.com UK

May 27, 2025
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May 27, 2025

Chardan Adjusts PT on Prothena to $18 From $40 After Drug Removal From Model, Keeps Buy Rating - marketscreener.com

May 27, 2025
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May 27, 2025

Prothena (PRTA) Price Target Slashed Following Clinical Trial Ou - GuruFocus

May 27, 2025
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May 27, 2025

Prothena (PRTA) Faces Price Target Cut Following Trial Results | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Prothena (PRTA) Target Price Slashed Following Study Setback | P - GuruFocus

May 27, 2025
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May 27, 2025

Prothena (PRTA) Faces Setback with AFFIRM-AL Trial Results | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Jefferies Downgrades Prothena (PRTA) Following Study Setback | P - GuruFocus

May 27, 2025
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May 27, 2025

Prothena (PRTA) Downgraded by Oppenheimer After Trial Results | PRTA Stock News - GuruFocus

May 27, 2025
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May 27, 2025

Oppenheimer cuts Prothena stock rating after trial setback By Investing.com - Investing.com South Africa

May 27, 2025
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May 27, 2025

Jefferies cuts Prothena stock rating to hold, slashes target to $6 By Investing.com - Investing.com UK

May 27, 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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$1.08
price up icon 1.89%
$30.14
price down icon 3.74%
$573.26
price down icon 1.32%
$304.56
price up icon 3.98%
$4.50
price down icon 3.02%
$490.28
price down icon 19.01%
Cap:     |  Volume (24h):