Logo image of PRTA

PROTHENA CORP PLC (PRTA) Stock Overview

NASDAQ:PRTA - IE00B91XRN20 - Common Stock

8.77 USD
+0.21 (+2.45%)
Last: 8/22/2025, 8:00:00 PM
8.77 USD
0 (0%)
After Hours: 8/22/2025, 8:00:00 PM

PRTA Key Statistics, Chart & Performance

Key Statistics
52 Week High22.83
52 Week Low4.32
Market Cap472.09M
Shares53.83M
Float43.21M
Yearly DividendN/A
Dividend YieldN/A
EPS(TTM)-5.03
PEN/A
Fwd PEN/A
Earnings (Next)11-10 2025-11-10/amc
IPO12-21 2012-12-21
Sector
GICS SectorHealth Care
GICS IndustryBiotechnology
GICS IndustryGroupPharmaceuticals, Biotechnology & Life Sciences
GICS SubIndustryBiotechnology


PRTA short term performance overview.The bars show the price performance of PRTA in the last week, last 2 weeks, last month, last 3 and 6 months. 1 week 2 week 1 month 3 months 6 months 0 20 -20 -40

PRTA long term performance overview.The bars show the price performance of PRTA in the last 1, 2 and 3 years. 1 year 2 years 3 years -20 -40 -60 -80

The current stock price of PRTA is 8.77 USD. In the past month the price increased by 31.29%. In the past year, price decreased by -59.6%.

PROTHENA CORP PLC / PRTA Daily stock chart

PRTA Competitors/Peers

The largest stocks on the US markets in the "Biotechnology" sub-industry
Full List
Symbol
Company Name
TA
FA
PE
Market Cap
ABBV ABBVIE INC 19.89 372.04B
AMGN AMGEN INC 13.47 158.13B
GILD GILEAD SCIENCES INC 14.83 142.41B
VRTX VERTEX PHARMACEUTICALS INC 23.32 101.30B
REGN REGENERON PHARMACEUTICALS 12.92 62.48B
ALNY ALNYLAM PHARMACEUTICALS INC N/A 59.56B
ARGX ARGENX SE - ADR 71.2 40.39B
ONC BEONE MEDICINES LTD-ADR 6.35 37.29B
INSM INSMED INC N/A 27.88B
BNTX BIONTECH SE-ADR N/A 26.66B
NTRA NATERA INC N/A 22.73B
BIIB BIOGEN INC 8.7 20.42B

About PRTA

Company Profile

PRTA logo image Prothena Corp. Plc is a clinical-stage neuroscience company, which engages in the discovery and development of novel therapies to change the course of devastating diseases. The firm is engaged in protein dysregulation and a pipeline of investigational therapeutics for rare peripheral amyloid diseases. The firm is advancing a pipeline of therapeutic candidates for a range of indications and targets to integrate scientific insights around neurological dysfunction and the biology of misfolded proteins. The Company’s pipeline includes both wholly owned and partnered programs being developed for the potential treatment of diseases, including AL amyloidosis, ATTR amyloidosis, Alzheimer’s disease, Parkinson’s disease and a range of other neurodegenerative diseases. Its clinical programs include birtamimab for the potential treatment of AL amyloidosis, prasinezumab for the potential treatment of Parkinson’s disease, NNC6019/PRX004 for the potential treatment of ATTR amyloidosis, and PRX005 and PRX012 for the potential treatment of Alzheimer’s disease.

Company Info

PROTHENA CORP PLC

77 Sir John Rogersons Quay, Block C, Grand Canal Docklands

DUBLIN D02 VK60 IE

CEO: Gene G. Kinney

Employees: 163

PRTA Company Website

PRTA Investor Relations

Phone: 35312362500

PROTHENA CORP PLC / PRTA FAQ

What is the stock price of PROTHENA CORP PLC today?

The current stock price of PRTA is 8.77 USD. The price increased by 2.45% in the last trading session.


What is the ticker symbol for PROTHENA CORP PLC stock?

The exchange symbol of PROTHENA CORP PLC is PRTA and it is listed on the Nasdaq exchange.


On which exchange is PRTA stock listed?

PRTA stock is listed on the Nasdaq exchange.


What is the price forecast or stock price prediction for PROTHENA CORP PLC stock?

14 analysts have analysed PRTA and the average price target is 26.52 USD. This implies a price increase of 202.39% is expected in the next year compared to the current price of 8.77. Check the PROTHENA CORP PLC stock analysts ratings, price target forecast and up-and down grades for more detailed information.


What is PROTHENA CORP PLC worth?

PROTHENA CORP PLC (PRTA) has a market capitalization of 472.09M USD. This makes PRTA a Small Cap stock.


How many employees does PROTHENA CORP PLC have?

PROTHENA CORP PLC (PRTA) currently has 163 employees.


What are the support and resistance levels for PROTHENA CORP PLC (PRTA) stock?

PROTHENA CORP PLC (PRTA) has a support level at 8.76 and a resistance level at 12.86. Check the full technical report for a detailed analysis of PRTA support and resistance levels.


Is PROTHENA CORP PLC (PRTA) expected to grow?

The Revenue of PROTHENA CORP PLC (PRTA) is expected to decline by -81.97% in the next year. Check the estimates tab for more information on the PRTA EPS, Sales, EBIT and EBITDA future analyst estimates.


Should I buy PROTHENA CORP PLC (PRTA) stock?

There is no straightforward answer here. It depends on your investment strategy as different types of investors will look at different aspects. In any case it is important to make an informed decision and these pages can help you forming an opinion:


Does PROTHENA CORP PLC (PRTA) stock pay dividends?

PRTA does not pay a dividend.


When does PROTHENA CORP PLC (PRTA) report earnings?

PROTHENA CORP PLC (PRTA) will report earnings on 2025-11-10, after the market close.


What is the Price/Earnings (PE) ratio of PROTHENA CORP PLC (PRTA)?

PROTHENA CORP PLC (PRTA) does not have a PE ratio as the earnings reported over the last twelve months were negative (-5.03).


What is the Short Interest ratio of PROTHENA CORP PLC (PRTA) stock?

The outstanding short interest for PROTHENA CORP PLC (PRTA) is 10.12% of its float. Check the ownership tab for more information on the PRTA short interest.


PRTA Technical Analysis

ChartMill assigns a technical rating of 4 / 10 to PRTA. When comparing the yearly performance of all stocks, PRTA is a bad performer in the overall market: 86.53% of all stocks are doing better.


Chartmill TA Rating
Chartmill Setup Rating

PRTA Fundamental Analysis

ChartMill assigns a fundamental rating of 3 / 10 to PRTA. While PRTA has a great health rating, there are worries on its profitability.


Chartmill FA Analysis
Valuation
Growth
Profitability
Health
Dividend

PRTA Financial Highlights

Over the last trailing twelve months PRTA reported a non-GAAP Earnings per Share(EPS) of -5.03. The EPS decreased by -403% compared to the year before.


Industry RankSector Rank
PM (TTM) N/A
ROA -75.91%
ROE -93.4%
Debt/Equity 0
Chartmill High Growth Momentum
EPS Q2Q%-241.8%
Sales Q2Q%-96.65%
EPS 1Y (TTM)-403%
Revenue 1Y (TTM)-95.24%

PRTA Forecast & Estimates

14 analysts have analysed PRTA and the average price target is 26.52 USD. This implies a price increase of 202.39% is expected in the next year compared to the current price of 8.77.

For the next year, analysts expect an EPS growth of -78.72% and a revenue growth -81.97% for PRTA


Analysts
Analysts74.29
Price Target26.52 (202.39%)
EPS Next Y-78.72%
Revenue Next Year-81.97%

PRTA Ownership

Ownership
Inst Owners74.37%
Ins Owners20.17%
Short Float %10.12%
Short Ratio3.35