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Prothena Corporation plc (PRTA)

NASDAQ: PRTA · USD

$8.41

-0.15 (-1.8%)· Recorded snapshot

Coverage state: Market snapshot only — no published research

Market snapshot recorded 2026-07-31 02:00 UTC. No published research is attached to this ticker. Prices and fundamentals on this server-rendered page are dated snapshots, not a real-time trading feed.

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Market cap	440.3M
Revenue (ttm)	57.9M
Net income (ttm)	-151.2M
EPS (ttm)	-$2.81
Shares out	52.4M
Volume	502,233
Beta	-0.31
Price target	$21.4	+154.5%

Market data

Price

Recent price action with selectable time range.

Financial snapshot

Revenue (ttm): 57.9M
Net income (ttm): -151.2M
EPS (ttm): -$2.81
Market cap: 440.3M

Ticker	Name	Market cap	P/E	P/S	ROIC	5Y rev CAGR	1Y total return	Rating
ALNY	Alnylam Pharmaceuticals, Inc.	27.4B	36.9x	5.7x	96.6%	+47.5%	-37.8%	Strong Buy
ARGX	argenx SE	53.8B	31.3x	10.1x	50.6%	+58.8%	+45.7%	Strong Buy
EXAS	Exact Sciences Corp	—	—	—	—	—	—	Hold

All PRTA indicators

Market & fundamental data

Available fields

210

Groups with data

Currency

USD

Showing 210 of 210 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	$118.5M
Exchange	NASDAQ
Financial currency	USD
First seen	2026-05-09
Industry	Biotechnology
Isin	IE00B91XRN20
Last refreshed	2026-07-31
Market cap	$440.3M
Market cap category	Small-Cap
Price	$8.41
Price currency	USD
Rev Per Employee	864,776.12x
Sector	Healthcare
Sector PE	45.21
Sector PE Fwd	23.64
Sic	2834
Symbol	PRTA
Website	https://www.prothena.com

Valuation

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

Metric	Value
Earnings Yield	-34.34%
EV Sales Forward	3.68x
EV/Sales	2.04x
FCF yield	-18.5%
P/B ratio	1.43x
P/S ratio	7.6x
PS Forward	13.66x

Profitability

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

Metric	Value
EBIT Margin	-205.43%
EBITDA Margin	-203.95%
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
Profitable Quarters	$1
ROA	-13.78
Roa5y	-12.17
ROCE	-37.5
ROE	-40.3
Roe5y	-22.54
ROIC	-4,795.6

Growth

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

Metric	Value
Cagr10y	-17.13%
Cagr1y	21.37%
Cagr3y	-49.85%
Cagr5y	-29.91%
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	$73.09
Net Cash Growth	-21.07%
Net Debt Equity	$-1.03
Tangible Book Value	$312.6M
Tangible Book Value Per Share	$5.89
WACC	2.48

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	-84.72%
1Y total return	21.36%
200-day SMA	9.65
3Y total return	-87.39%
50-day SMA	9.07
50-day SMA vs 200-day SMA	50under200
5Y total return	-83.09%
All Time High	79.75
All Time High Change	-89.45%
All Time High Date	2021-09-27
All Time Low	4.32
All Time Low Change	94.68%
All Time Low Date	2025-05-28
ATR	0.43
Beta	-0.31
Beta1y	0.61
Beta2y	1.02
Ch YTD	-11.94
High	8.56
High52	11.8
High52 Date	2026-05-08
High52ch	-28.73%
Low	8.26
Low52	6.61
Low52 Date	2025-08-01
Low52ch	27.23%
Ma50ch	-7.32%
Premarket Change Percent	0
Premarket Price	$8.56
Price vs 200-day SMA	-12.84%
RSI	39.61
RSI Monthly	36.73
RSI Weekly	43
Sharpe ratio	0.56x
Sortino ratio	1
Total Return	0%
Tr YTD	-11.94
Tr1m	-15.65%
Tr1w	-1.41%
Tr3m	-22.63%

Analyst estimates

Ratings, targets, revisions, and forward estimate fields.

Metric	Value
Analyst Count	6
Analyst Count Top	5
Analyst Price Target Top	$21.4
Analyst Ratings	Hold
Analyst Ratings Top	Buy
Earnings EPS Estimate	$0.23
Earnings Revenue Estimate	546,664x
Earnings Revenue Estimate Growth	-87.63x
Operating Income	$-93.2M
Operating margin	-160.8
Price target	$21.4
Price Target Change	$154
Price Target Change Top	$154

Ownership and float

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

Metric	Value
Float	36,682,110%
Float Percent	70.07%
Shares Insiders	20.38%
Shares Institutions	78.73%
Shares Out	52,353,237
Shares Qo Q	0.52%
Shares Yo Y	-0%
Short Float	22.35%
Short Ratio	12.84
Short Shares	15.66

Other indicators

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

Metric	Value
Adjusted FCF	$-115M
Adjusted OCF	-114,946,000
Average Volume	553,926.4x
Bv Per Share	5.89
CAPEX	$-96,000
Ch10y	-84.72
Ch1m	-15.65
Ch1w	-1.41
Ch1y	21.36
Ch3m	-22.63
Ch3y	-87.39
Ch5y	-83.09
Ch6m	-7.17
Change	-1.75%
Change From Open	-1.06
Close	8.56
Days Gap	-0.7
Depreciation Amortization	856,000
Dollar Volume	4,223,779.5
Earnings Date	2026-08-06
Earnings Time	amc
EBIT	$-119M
EBITDA	$-118.2M
EPS	$-2.81
F Score	2
FCF	$-81.4M
FCF EV Yield	-68.73x
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	9.44
Ma150ch	-10.9%
Ma20	8.9
Ma20ch	-5.51%
Net CF	-88,473,000
Next Earnings Date	2026-08-06
Open	8.5
Optionable	Yes
Position In Range	50
Ppne	9,351,000
Pre Close	8.56
Price Date	2026-07-30
Ptbv Ratio	1.41
Relative Volume	0.91x
Revenue	57,940,000x
SBC By Revenue	58x
Share Based Comp	33,606,000
Tax By Revenue	76.7x
Tr6m	-7.17%
Volume	502,233
Z Score	2.56

Prothena Corporation plc (PRTA)

Coverage state: Market snapshot only — no published research

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Price

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Profitability

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Growth

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Liquidity

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Performance and technicals

Analyst estimates

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