Prothena

1D
1W
1M
3M
YTD
1Y
5Y
ALL

Why Robinhood?

Robinhood gives you the tools you need to put your money in motion. You can buy or sell Prothena and other ETFs, options, and stocks.

About PRTA

Prothena Corp. Plc is a clinical-stage neuroscience company, which engages in the discovery and development of novel therapies to change the course of devastating diseases. 

CEO
Gene G. Kinney
CEOGene G. Kinney
Employees
67
Employees67
Headquarters
Dublin, Dublin
HeadquartersDublin, Dublin
Founded
2012
Founded2012
Employees
67
Employees67

PRTA Key Statistics

Market cap
461.35M
Market cap461.35M
Price-Earnings ratio
-1.98
Price-Earnings ratio-1.98
Dividend yield
Dividend yield
Average volume
596.14K
Average volume596.14K
High today
$8.94
High today$8.94
Low today
$8.54
Low today$8.54
Open price
$8.83
Open price$8.83
Volume
283.03K
Volume283.03K
52 Week high
$13.74
52 Week high$13.74
52 Week low
$4.32
52 Week low$4.32

Stock Snapshot

With a market cap of 461.35M, Prothena(PRTA) trades at $8.57. The stock has a price-to-earnings ratio of -1.98.

During the trading session on 2026-03-18, Prothena(PRTA) shares reached a daily high of $8.94 and a low of $8.54. At a current price of $8.57, the stock is +0.4% higher than the low and still -4.2% under the high.

Trading activity shows a volume of 283.03K, compared to an average daily volume of 596.14K.

Over the past 52 weeks, Prothena(PRTA) stock has traded between a high of $13.74 and a low of $4.32.

Over the past 52 weeks, Prothena(PRTA) stock has traded between a high of $13.74 and a low of $4.32.

Analyst ratings

50%

of 6 ratings
Buy
50%
Hold
33.3%
Sell
16.7%

People also own

Based on the portfolios of people who own PRTA. This list is generated using Robinhood data, and it’s not a recommendation.

Similar Marketcap

This list is generated by looking at the six larger and six smaller companies by market cap in relation to this company.

Popular Stocks

This list is generated by looking at the top 100 stocks and ETFs most commonly held by Robinhood customers and showing a random subset

Newly Listed

This list is generated by showing companies that recently went public.

All investments involve risks, including the loss of principal. Securities trading offered through Robinhood Financial LLC, Member SIPC and a registered broker-dealer. Options are risky and aren’t suitable for all investors. To learn more about risks, read the Options Disclosure Document.