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Prothena Corporation plc (PRTA)
Assess today's live Prothena Corporation plc (PRTA) share price, performance and insights using our live NASDAQ: PRTA stock exchange data.
Analyse the historical data and Prothena Corporation plc share price performance charts on this page. Our technical summary section provides analysis on Prothena share price buy/sell indicators using real-time data (or discuss the Prothena (PRTA) stock price today with other investors in the Prothena NASDAQ share price and sentiment chat forum).
Use the dropdown to select a relevant stock exchange for the current NASDAQ PRTA share price (ISIN: IE00B91XRN20) to enhance your trading decisions with our free investment tools and resources.
What Is the Prothena Corporation plc Share Price Today?
The Prothena share price today is 9.73.
What Is the Stock Symbol for Prothena Corporation plc
The stock symbol (or 'ticker') for Prothena Corporation plc is "PRTA."
What Stock Exchange Does Prothena Corporation plc Trade On?
Prothena Corporation plc is listed and trades on the NASDAQ stock exchange.
Is Prothena Corporation plc a Good Stock to Buy?
Determining whether Prothena Corporation plc—or any stock—is a good buy requires comprehensive analysis. To evaluate its potential, investors can sign up to InvestingPro, where they can assess share price, fair value and other essential metrics.
Analyse the historical data and Prothena Corporation plc share price performance charts on this page. Our technical summary section provides analysis on Prothena share price buy/sell indicators using real-time data (or discuss the Prothena (PRTA) stock price today with other investors in the Prothena NASDAQ share price and sentiment chat forum).
Use the dropdown to select a relevant stock exchange for the current NASDAQ PRTA share price (ISIN: IE00B91XRN20) to enhance your trading decisions with our free investment tools and resources.
What Is the Prothena Corporation plc Share Price Today?
The Prothena share price today is 9.73.
What Is the Stock Symbol for Prothena Corporation plc
The stock symbol (or 'ticker') for Prothena Corporation plc is "PRTA."
What Stock Exchange Does Prothena Corporation plc Trade On?
Prothena Corporation plc is listed and trades on the NASDAQ stock exchange.
Is Prothena Corporation plc a Good Stock to Buy?
Determining whether Prothena Corporation plc—or any stock—is a good buy requires comprehensive analysis. To evaluate its potential, investors can sign up to InvestingPro, where they can assess share price, fair value and other essential metrics.
NASDAQ
Currency in USD
Fair Value
An estimate of a stock's true price based on valuation models like discounted cash flow, peer valuation multiples, and dividend discount models.
Day's Range
9.68
10.09
52 wk Range
4.32
16.67
Earnings results expected in 15 days
1/2
Fair Value
An estimate of a stock's true price based on valuation models like discounted cash flow, peer valuation multiples, and dividend discount models.
Day's Range
9.6810.09
52 wk Range
4.3216.67
Key Statistics
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Prev. Close
Open
Volume
Average Volume (3m)
1-Year Change
Book Value / Share
Fair Value
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Shares Outstanding
Revenue
Net Income
EPS
EPS Growth Forecast
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N/A
(N/A)
Dividends Payment Streak
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Return on Assets
Return on Equity
Gross Profit Margin
Price/Book
EBITDA
EV/EBITDA
Beta
Prev. Close
Open
Volume
Average Volume (3m)
1-Year Change
Book Value / Share
Fair Value
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Shares Outstanding
Revenue
Net Income
EPS
EPS Growth Forecast
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N/A
(N/A)
Dividends Payment Streak
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Return on Assets
Return on Equity
Gross Profit Margin
Price/Book
EBITDA
EV/EBITDA
Beta
PRTA Scorecard
Company’s Health
Assesses a company's financial position by analysing its market value, financial ratios, industry benchmarks, and competitors.
UnlockFair Value
An estimate of a stock's true price based on valuation models like discounted cash flow, peer valuation multiples, and dividend discount models.
Unlock PriceTechnical Analysis
Strong Buy
Price Target
20.33
Upside
+108.98%
Members' Sentiments
Bearish
Bullish
ProTips
Tips that distill complex financial data into concise, actionable investment insights.
Quickly burning through cash
Technical Analysis
Summary
Strong Sell
Sell
Neutral
Buy
Strong Buy
Strong Sell
Technical Indicators
Strong Sell
Moving Averages
Sell
Prothena Company Profile
Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation in the United States. Its product pipeline include Prasinezumab, an investigational humanized monoclonal antibody which is in phase 2b clinical trial, as well as phase 1 and 2 clinical trials for the treatment of parkinson’s disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in phase 2 clinical trial for potential treatment of transthyretin amyloidosis; BMS-986446, an investigational antibody, which is in phase 2 clinical trial to treat Alzheimer’s disease; PRX012, an investigational antibody, which is in phase 1 clinical trial to treat Alzheimer’s disease; PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer’s disease; and PRX019, an investigational antibody, which is in phase 1 clinical trial for the potential treatment of neurodegenerative diseases. It has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and master collaboration agreement with Bristol Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. Prothena Corporation plc was incorporated in 2012 and is based in Dublin, Ireland.
Compare PRTA to Peers and Sector
Metrics to compare | PRTA | Sector Sector - Average of metrics from a broad group of related Healthcare sector companies | Relationship RelationshipPRTAPeersSector | |
|---|---|---|---|---|
P/E Ratio | −1.9x | −2.8x | −0.6x | |
PEG Ratio | 0.02 | 0.09 | 0.00 | |
Price/Book | 1.8x | 4.3x | 2.6x | |
Price / LTM Sales | 44.4x | 152.1x | 3.4x | |
Upside (Analyst Target) | 86.1% | 118.2% | 42.5% | |
Fair Value Upside | Unlock | 14.8% | 5.0% | Unlock |
Analyst Ratings
4 Buy
2 Hold
1 Sell
Ratings:
7 analysts
Overall Consensus
Buy
Analysts 12-Month Price Target:
Average 20.33
(+108.98% Upside)
Earnings
Latest Release
Nov 06, 2025
EPS / Forecast
-0.68 / -0.72
Revenue / Forecast
2.40M / 6.64M
People Also Watch
FAQ
What Is the Prothena (PRTA) Share Price Today?
The live Prothena share price today is 9.73
What Stock Exchange Does Prothena (PRTA) Trade On?
Prothena is listed and trades on the Nasdaq Stock Exchange.
What Is the Ticker (Stock Symbol) for Prothena?
The stock symbol (also called a 'ticker') for Prothena is "PRTA."
What Is the Current Prothena Market Cap?
As of today, Prothena market capitalisation is 523.77M.
What Is Prothena's (PRTA) Earnings Per Share (TTM)?
The Prothena EPS is currently -5.21 (Trailing Twelve Months).
When Is the Next Prothena Earnings Date?
Prothena's next earnings report will be released on 12 Feb 2026.
Is PRTA a Buy or Sell From a Technical Analyst Perspective?
Based on today's Prothena moving averages and other technical indicators, the daily buy/sell signal is Strong Buy.
How Many Times Has Prothena Stock Split?
Prothena has split 0 times. (See the PRTA stock split history page for full effective split date and price information.)
How Many Employees Does Prothena Have?
Prothena has 163 employees.
What is the current trading status of Prothena (PRTA)?
As of 28 Jan 2026, Prothena (PRTA) is trading at a price of 9.73, with a previous close of 9.94. The stock has fluctuated within a day range of 9.68 to 10.09, while its 52-week range spans from 4.32 to 16.67.
What Is Prothena (PRTA) Price Target According to Analysts?
The average 12-month price target for Prothena is USD20.33, with a high estimate of USD36 and a low estimate of USD8. 4 analysts recommend buying the stock, while 1 suggest selling, leading to an overall rating of Buy. The stock has an +108.98% Upside potential.
What Is the PRTA Premarket Price?
PRTA's last pre-market stock price is 10.04. The pre-market share volume is 260.00, and the stock has decreased by 0.10, or 1.01%.
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