PRTA

Prothena Corporation plc
NASDAQHEALTHCAREBIOTECHNOLOGY

Key Statistics

Market Cap
$455.87M
P/E Ratio
EPS
$-0.82
Beta
-0.35
52W High
$11.80
52W Low
$7.73
50-Day MA
$8.89
200-Day MA
$9.57
Dividend Yield
Profit Margin
-80.70%
Forward P/E
10.63
PEG Ratio
0.80

About Prothena Corporation plc

Prothena Corporation plc, an advanced stage clinical company, is focused on the discovery and development of new therapies for life-threatening diseases in the United States. The company is headquartered in Dublin, Ireland.

Official WebsiteUSAFY End: December

Fundamentals

Revenue (TTM)$54.53M
Gross Profit (TTM)$-10.42M
EBITDA$-59.04M
Operating Margin-1850.00%
Return on Equity-14.40%
Return on Assets-10.70%
Revenue/Share (TTM)$1.02
Book Value$5.54
Price-to-Book1.58
Price-to-Sales (TTM)8.36
EV/Revenue3.184
EV/EBITDA-3.58
Quarterly Earnings Growth (YoY)0.00%
Quarterly Revenue Growth (YoY)-77.10%
Shares Outstanding$51.34M
Float$35.45M
% Insiders21.10%
% Institutions93.51%

Historical Volatility

HV 10-Day
30.15%
HV 20-Day
33.11%
HV 30-Day
35.76%
HV 60-Day
45.80%
HV Rank
0.4%

Volatility is currently contracting

Analyst Ratings

Consensus ($21.40 target)
2
Strong Buy
1
Buy
2
Hold
1
Strong Sell

Latest News

KMDA or PRTA: Which Is the Better Value Stock Right Now?

Investors interested in Medical - Biomedical and Genetics stocks are likely familiar with Kamada (KMDA) and Prothena (PRTA). But which of these two companies is the best option for those looking for undervalued stocks?

Zacks Investment Research8/14/2026Positive
SRPT or PRTA: Which Is the Better Value Stock Right Now?

Investors interested in Medical - Biomedical and Genetics stocks are likely familiar with Sarepta Therapeutics (SRPT) and Prothena (PRTA). But which of these two stocks is more attractive to value investors?

Zacks Investment Research6/24/2026Positive
Prothena Announces Leadership Team Updates

DUBLIN--(BUSINESS WIRE)---- $PRTA #Prothena--Prothena promoting Ms. Kingston to Chief Strategy Officer and Mr. Isaacs to General Counsel and Corporate Secretary. Mr. Malecek is departing in June.

Business Wire4/10/2026Neutral

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Data last updated: 8/18/2026