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Prothena Corporation plc (PRTA)

Featured in Small-Cap Stocks

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Stock Summary Fair Value Profitability & Growth Quality & Risk Events & Dividends Technical Outlook FAQ

Jump between the core stock analysis sections, valuation data, fair value models, technical outlook, and FAQ.

Data update note: Fair value and stock analysis metrics are updated after regular market sessions when new data becomes available.
Ticker Fair Value Fair Value Upside/Downside Fair Value Rating Analyst Price Target Analyst Target Upside/Downside Analyst Target Rating Overall Financial Health Upcoming Dividend Ex-Date Dividend Payment Date Upcoming Dividend Dividend Yield Next Earnings Date P/E Ratio Price-to-Book Ratio Price-to-Sales Ratio Market Cap Enterprise Value Total Debt / Total Capital Free Float / Shares Outstanding Altman Z-Score Payout Ratio Free Cash Flow / Net Income
NASDAQ-PRTA
$11.48
32.8% Upside
Undervalued
$21.40
147.7% Upside
Bargain
Fair
—
—
—
0.0%
August 10, 2026
-3.0x
1.4x
7.8x
453.9 M
130 M
1.7%
70.1%
3.8
—
53.9%
Valuation • Fair Value

Prothena Corporation plc (NASDAQ-PRTA) Fair Value by Valuation Model

Compare the primary fair value estimate for Prothena Corporation plc (NASDAQ-PRTA) with model-based valuation references such as DCF, Ben Graham, DDM, EPV and comparable-company valuation.

Primary Valuation Read

Fair Value

$11.48

Estimated upside of 32.8% versus the current market price.

Fair Value Confidence

Med

Confidence level for the primary fair value estimate.

DCF Fair Value

NM

Discounted cash flow valuation reference.

Ben Graham Formula Value

$0

Classic Ben Graham valuation formula reference.

DDM Fair Value

NM

Dividend discount model valuation reference.

EPV Fair Value

$12.06

Earnings power value estimate.

Comps Fair Value

$11.38

Comparable-company valuation reference.

Analyst Price Target

$21.40

Analysts imply upside of 147.7%.

How to read these valuation models

Use this section to compare the primary fair value estimate for Prothena Corporation plc (NASDAQ-PRTA) with several model-based valuation references. Different models can produce different outputs because each method relies on a different set of assumptions, so the primary fair value estimate should be read alongside the model spread rather than in isolation.

Profitability • Growth

Profitability & Growth for Prothena Corporation plc (NASDAQ-PRTA)

A compact read on revenue, forward revenue expectations, EBITDA and operating profitability trends.

Revenue

57.94 M

Current operating scale indicator.

Revenue Forecast

91.25 M

Forward revenue estimate.

EBITDA

-92.332 M

Current operating profitability reference.

EBITDA Forecast

-355.7 M

Forward operating profitability estimate.

How to read profitability and growth

This section helps investors review Prothena Corporation plc (NASDAQ-PRTA) from an operating perspective by combining current scale, forward revenue expectations and EBITDA-related profitability measures.

Quality • Risk

Quality & Financial Risk for Prothena Corporation plc (NASDAQ-PRTA)

Review financial health, earnings quality and balance-sheet risk through Piotroski, Beneish, Altman and cash conversion metrics.

Financial Health

Fair

Mixed or neutral financial-health read.

Piotroski Score

2

Weak quality score that deserves closer review.

Beneish M-Score

NM

Forensic accounting screen.

Altman Z-Score

3.8

Relatively strong balance-sheet zone.

FCF / Net Income

53.9%

Cash conversion quality indicator.

How to read quality and risk

This section combines quality, balance-sheet and accounting-risk indicators for Prothena Corporation plc (NASDAQ-PRTA). Read the metrics together: no single score is a complete investment conclusion, but the combined view can highlight financial strength, earnings quality and areas that may deserve closer review.

Events • Dividends

Upcoming Events & Dividends for Prothena Corporation plc (NASDAQ-PRTA)

Track the next earnings date, ex-dividend date, dividend payment date, dividend yield and upcoming distribution details where available.

Next Earnings Date

August 10, 2026

Days to Earnings

20

Dividend Payment Date

Not available

Ex-Dividend Date

Not available

Dividend Yield

0.0%

Income yield reference.

Upcoming Dividend

Not available

Data is currently unavailable.

Payment Type

Not available

Data is currently unavailable.

Dividend Currency

Not available

Data is currently unavailable.

Payout Ratio

Not available

Data is currently unavailable.

How to read events and dividends

This section helps investors track time-sensitive items for Prothena Corporation plc (NASDAQ-PRTA), including the next earnings date and dividend-related milestones. These items can matter for short-term volatility, income planning and event-driven positioning.

Stock Forecast • Technical Outlook

Prothena Corporation plc (NASDAQ-PRTA) Stock Forecast & Technical Outlook

Review Prothena Corporation plc (NASDAQ-PRTA) across multiple technical time frames, alongside analyst recommendation data, to form a faster read on market positioning and near-term sentiment.

Technical Signals by Time Frame

Switch between time frames to review the current technical signal for the stock.

Strong Sell Sell Neutral Buy Strong Buy
Time frame: 15-minute • intraday
Strong Sell

The 15-minute technical read for Prothena Corporation plc (NASDAQ-PRTA) is currently Strong Sell. Use it as a timing signal only, and compare it with valuation, fundamentals and upcoming events before drawing a broader view.

Strong Sell Sell Neutral Buy Strong Buy
Time frame: 1-hour • short-term
Strong Sell

The 1-hour technical read for Prothena Corporation plc (NASDAQ-PRTA) is currently Strong Sell. Use it as a timing signal only, and compare it with valuation, fundamentals and upcoming events before drawing a broader view.

Strong Sell Sell Neutral Buy Strong Buy
Time frame: daily • daily
Strong Sell

The daily technical read for Prothena Corporation plc (NASDAQ-PRTA) is currently Strong Sell. Use it as a timing signal only, and compare it with valuation, fundamentals and upcoming events before drawing a broader view.

Strong Sell Sell Neutral Buy Strong Buy
Time frame: weekly • weekly
Strong Sell

The weekly technical read for Prothena Corporation plc (NASDAQ-PRTA) is currently Strong Sell. Use it as a timing signal only, and compare it with valuation, fundamentals and upcoming events before drawing a broader view.

Strong Sell Sell Neutral Buy Strong Buy
Time frame: monthly • monthly
Neutral

The monthly technical read for Prothena Corporation plc (NASDAQ-PRTA) is currently Neutral. Use it as a timing signal only, and compare it with valuation, fundamentals and upcoming events before drawing a broader view.

Analyst Consensus for Prothena Corporation plc (NASDAQ-PRTA)

A consolidated view of buy, hold and sell recommendations based on the currently available analyst data.

Strong Sell Sell Neutral Buy Strong Buy
Consolidated analyst recommendation mix
Hold

Based on the available recommendation mix, Prothena Corporation plc (NASDAQ-PRTA) has a Hold consensus, with 1 buy, 2 hold and 0 sell recommendations in the current data set.

Buy 1
Hold 2
Sell 0
FAQ • Fast Investor Answers

Prothena Corporation plc (NASDAQ-PRTA) Stock FAQ

Quick answers about Prothena Corporation plc (NASDAQ-PRTA) stock, including fair value, valuation rating, analyst price target, dividends, earnings dates, market capitalization, financial health and other key stock analysis metrics.

Fair Value
$11.48
Estimated upside 32.8%
Valuation Rating
Undervalued
Estimated upside of 32.8%
Analyst Target
$21.40
Implied upside 147.7%
Financial Health
Fair
Current financial-health read

The current fair value estimate for Prothena Corporation plc (NASDAQ-PRTA) is $11.48. This implies an estimated upside of 32.8% versus the current market price.

Based on the current fair value estimate, the stock appears undervalued, with estimated upside of 32.8% versus the current market price.

The available analyst price target for Prothena Corporation plc (NASDAQ-PRTA) is $21.40. The analyst target implies estimated upside of 147.7%.

The current financial health read for Prothena Corporation plc (NASDAQ-PRTA) is Fair. This should be reviewed alongside valuation, profitability, debt and cash-flow quality metrics.

The next earnings date currently listed for Prothena Corporation plc (NASDAQ-PRTA) is August 10, 2026.

Based on the current data, dividend yield is 0.0%.

The current P/E ratio listed for Prothena Corporation plc (NASDAQ-PRTA) is -3.0x. Use it together with growth, margins and sector comparisons rather than as a standalone valuation signal.

The current market capitalization listed for Prothena Corporation plc is 453.9 M.

The current enterprise value listed for Prothena Corporation plc is 130 M. Enterprise value can provide a broader valuation view than market capitalization alone because it also considers net debt.

The ticker symbol for Prothena Corporation plc is NASDAQ-PRTA, and the stock is listed on NASDAQ.

Prothena Corporation plc (NASDAQ-PRTA) is listed on NASDAQ.

The current debt-to-total-capital ratio listed for Prothena Corporation plc is 1.7%, which helps investors evaluate the company’s financing structure and leverage profile.

The free float listed for Prothena Corporation plc is 70.1%. Free float helps investors understand how much of the share base is available for public trading.

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