Healthcare / BiotechnologyUpdated 2026-05-10 22:07 UTC

PRTA stock hub

Prothena Corporation plc has a live ticker hub with the latest available market, valuation, profitability, growth, ownership, and risk indicators.

Browse stocks

PRTAis not in this month’s coverageGet our monthly research letter — no spam

Fair value midpoint

n/a

Fair value pending

Upside to midpoint

n/a

Based on latest report

Confidence

n/a

Data quality and model convergence

Market cap

561.8M

NASDAQ

Market data

Live price

Current market quote for this ticker.

Current price

PRTA

In the news

Latest news · PRTA

Recent company headlines from major financial publishers.

—

Fetching the latest headlines.

—

Fetching the latest headlines.

—

Fetching the latest headlines.

Calendar

Next earnings

Upcoming earnings date and setup when available.

Upcoming

DateLoading

Window—

EPS estimate—

Revenue estimate—

Sector context

Where the current metrics sit

Percentiles come from the backend screener cohort cache for the ticker's country and sector.

Forward P/En/a

P25 12.3P50 18.4P75 33.1

Trailing P/En/a

P25 14.9P50 23.2P75 38.5

ROE-40.3

P25 -105.6P50 -46.5P75 -3.1

ROIC-4,795.6

P25 -63.1P50 -27.3P75 0.5

Benchmarks - 1M

S&P 500n/a

Nasdaq Compositen/a

Dow Jones Industrial Averagen/a

Russell 2000n/a

Indicator catalog

All PRTA market and fundamental indicators

A searchable catalog of the available market, valuation, profitability, growth, balance-sheet, ownership, and analyst metrics for this ticker.

Available fields

208

Groups with data

Currency

USD

Showing 208 of 208 available metrics for this ticker.

Profile and market data

Ticker identity, listing, currency, market cap, and source dates.

Metric	Value
Cik	0001559053
Company name	Prothena Corporation plc
Country	Ireland
Country code	US
Cusip	G72800108
Employees	67
Employees Change	-96%
Employees Change Percent	-58.9
Enterprise value	$239.9M
Exchange	NASDAQ
Financial currency	USD
First seen	2026-05-09
Industry	Biotechnology
Isin	IE00B91XRN20
Last refreshed	2026-05-10
Market cap	$561.8M
Market cap category	Small-Cap
Price	$10.73
Price currency	USD
Rev Per Employee	864,776.12x
Sector	Healthcare
Sic	2834
Symbol	PRTA
Website	https://www.prothena.com

Valuation

Multiples, yields, enterprise-value ratios, and valuation checks.

Metric	Value
Earnings Yield	-26.91%
EV/Sales	4.14x
FCF yield	-14.5%
P/B ratio	1.82x
P/S ratio	9.7x

Profitability

Margins, returns on capital, cash conversion, and quality metrics.

Metric	Value
EBIT Margin	-160.84%
EBITDA Margin	-159.36%
Gross margin	-66.84%
Gross Profit	$-38.7M
Net Income	$-151.2M
Net Income Growth Quarters	3%
Net Income Growth Years	0%
Pretax Margin	-184.21%
Profit Margin	-260.92%
Profit Per Employee	$-2.3M
ROA	-13.78
Roa5y	-12.17
ROCE	-29.36
ROE	-40.3
Roe5y	-22.54
ROIC	-4,795.6

Growth

Revenue, earnings, cash-flow, and forward growth indicators.

Metric	Value
Cagr10y	-11.95%
Cagr1y	47.23%
Cagr3y	-48.5%
Cagr5y	-15.31%
EPS Growth Quarters	3
EPS Growth Years	0
Revenue Growth	-58x
Revenue Growth Q	1,706.37x
Revenue Growth Quarters	1x
Revenue Growth Years	0x
Revenue Growth3 Y	1.8x
Revenue Growth5 Y	131.47x

Financial strength

Debt, cash, solvency, accounting-quality, and balance-sheet signals.

Metric	Value
Asset Turnover	$0.14
Assets	$349.9M
Cash	$329.5M
Current Assets	$339.2M
Current Liabilities	$32.5M
Debt	$7.7M
Debt Equity	$0.02
Equity	$312.6M
Liabilities	$37.3M
Long Term Assets	$10.7M
Long Term Liabilities	$4.8M
Net Cash	$321.8M
Net Cash By Market Cap	$57.29
Net Cash Growth	-21.07%
Net Debt Equity	$-1.03
Tangible Book Value	$312.6M
Tangible Book Value Per Share	$5.89
WACC	2.96

Liquidity

Current-asset coverage and working-capital efficiency metrics.

Metric	Value
Current ratio	10.43
Net Working Capital	$-19.9M
Quick ratio	10.13
Working Capital	$306.7M
Working Capital Turnover	$0.17

Dividends and buybacks

Dividend yield, payout, buybacks, and shareholder-yield indicators.

Metric	Value
Buyback Yield	0%
Dividend Yield	0%

Performance and technicals

Returns, volatility, beta, momentum, RSI, and moving-average context.

Metric	Value
10Y total return	-72%
1Y total return	47.19%
200-day SMA	9.44
3Y total return	-86.35%
50-day SMA	10.02
50-day SMA vs 200-day SMA	50over200
5Y total return	-56.42%
All Time High	79.75
All Time High Change	-86.55%
All Time High Date	2021-09-27
All Time Low	4.32
All Time Low Change	148.38%
All Time Low Date	2025-05-28
ATR	0.52
Beta	-0.23
Beta1y	0.4
Beta2y	0.98
Ch YTD	12.36
High	11.8
High52	11.8
High52 Date	2026-05-08
High52ch	-9.07%
Low	10.62
Low52	4.32
Low52 Date	2025-05-28
Low52ch	148.38%
Ma50ch	7.13%
Premarket Change Percent	1.71
Premarket Price	$10.7
Premarket Volume	1,038
Price vs 200-day SMA	13.67%
RSI	52.37
RSI Monthly	40.23
RSI Weekly	58.38
Sharpe ratio	0.91x
Sortino ratio	1.35
Total Return	0%
Tr YTD	12.36
Tr1m	3.57%
Tr1w	0.85%
Tr3m	20.43%

Analyst estimates

Ratings, targets, revisions, and forward estimate fields.

Metric	Value
Analyst Count	10
Analyst Count Top	6
Analyst Price Target Top	$20.2
Analyst Ratings	Buy
Analyst Ratings Top	Strong Buy
Earnings EPS Estimate	$-0.31
Earnings Revenue Estimate	2,000,000x
Earnings Revenue Estimate Growth	-29.28x
Operating Income	$-93.2M
Operating margin	-160.8
Price target	$19.13
Price Target Change	$78.29
Price Target Change Top	$88.26

Ownership and float

Institutional, insider, float, short-interest, and share-count fields.

Metric	Value
Float	39,650,349%
Float Percent	75.74%
Shares Insiders	20.07%
Shares Institutions	85.73%
Shares Out	52,353,237
Shares Qo Q	0.52%
Shares Yo Y	-0%
Short Float	17.85%
Short Ratio	13.51
Short Shares	13.52

Other indicators

Additional ticker metrics that do not fit the primary research groupings yet.

Metric	Value
Adjusted FCF	$-115M
Average Volume	412,784.8x
Bv Per Share	5.89
CAPEX	$-96,000
Ch10y	-72
Ch1m	3.57
Ch1w	0.85
Ch1y	47.19
Ch3m	20.43
Ch3y	-86.35
Ch5y	-56.42
Ch6m	1.61
Change	2%
Change From Open	-2.45
Close	10.52
Days Gap	4.56
Depreciation Amortization	856,000
Dollar Volume	8,570,791.4
Earnings Date	2026-05-07
Earnings Time	amc
EBIT	$-93.2M
EBITDA	$-92.3M
EPS	$-2.81
F Score	2
FCF	$-81.4M
FCF EV Yield	-33.94x
FCF Per Share	$-1.56
Financing CF	-7,037,000
Fiscal Year End	December
Founded	2,012
Income Tax	$44.4M
Investing CF	-96,000
Is Primary Listing	1
Is Spac	No
Last Earnings Date	2026-05-07
Last Report Date	2026-03-31
Last Split Type	Never
Last10k Filing Date	2026-02-27
Ma150	9.86
Ma150ch	8.85%
Ma20	10.81
Ma20ch	-0.69%
Net CF	-88,473,000
Next Earnings Date	2026-08-03
Open	11
Optionable	Yes
Position In Range	9.32
Post Close	10.73
Postmarket Change Percent	2.52
Postmarket Price	$11
Ppne	9,351,000
Pre Close	10.52
Price Date	2026-05-08
Ptbv Ratio	1.8
Relative Volume	1.94x
Revenue	57,940,000x
SBC By Revenue	58x
Share Based Comp	33,606,000
Tax By Revenue	76.7x
Tr6m	1.61%
Volume	798,769
Z Score	2.56

Fast facts

Decision checkpoints

A compact product layer over the same report payload.

Risk gate

n/a

Named kill scenarios are reviewed before any bullish rating can stand.

Moat score

n/a

Business quality stays separate from stock attractiveness.

Forward P/E

n/a

Valuation uses the full report model stack, not a single multiple.

Next action

Research pending

Final action steps are kept in the recommendation tab.

Income

Does PRTA pay a dividend?

Capital-return profile for this ticker.

Performance

PRTA stock returns vs the market

Total return (incl. dividends) compared to S&P 500.

Ownership

Who owns PRTA?

Insider, institutional, and short-interest positioning.

Institutional ownership

+85.7%

Float: +75.7% of shares outstanding

Insider ownership

+20.1%

Stake held by company insiders. Higher generally signals alignment.

Negative means the company is buying back shares.

Technical

PRTA momentum and risk profile

RSI, moving-average stack, beta, and risk-adjusted return.

RSI (14)

52.4

Neutral momentum band

Price vs 200-day MA

+13.7%

50/200-day relationship not available

Beta (5Y)

-0.23

Less volatile than the market

Sharpe ratio

0.91

Risk-adjusted return — higher is better; >1.0 is solid.

Questions

About PRTA

Hub-level FAQ points readers to the deeper analysis pages.

What is the current PRTA stock rating?

Prothena Corporation plc is currently shown with the latest rating in the latest report. The hub links directly to the full analysis surface where the rating, fair-value bridge, risks, and scorecard are documented together.

Where can I read the full PRTA analysis?

The full report lives at /stocks/PRTA/analysis. The bare ticker page is a product hub that summarizes the latest read and sends readers into the relocated analysis tabs without making the analysis surface depend on the hub.

What fair-value range is used for PRTA?

The latest report frames PRTA around the latest fair-value range. Treat that range as the entry point, then check the valuation, sensitivity, and bear-case tabs before making an investment decision.

How often is the PRTA page updated?

The hub updates with the latest published stock report and live backend market data. The analysis pages remain reachable under /analysis, so a hub rollback does not remove the report reader.