Prothena 

$9.53
56
-$0.3-3.05% Today

Statistics

Day High
10.01
Day Low
9.45
52W High
11.51
52W Low
4.58
Volume
23,431,196
Avg. Volume
-
Mkt Cap
513.03M
P/E Ratio
-
Dividend Yield
-
Dividend
-

Upcoming

Earnings

10AugExpected
Q4 2024
Q1 2025
Q2 2025
Q3 2025
Q4 2025
Q1 2026
Next
-2.34
-1.36
-0.38
0.6
Expected EPS
-0.39
Actual EPS
N/A

Financials

-2,520.57%Profit Margin
Unprofitable
2020
2021
2022
2023
2024
2025
19.37MRevenue
-488.18MNet Income

Analyst Ratings

16Average Price Target
The highest estimate is 20.00.
From 2 ratings within the last 6 months. This is not an investment recommendation.
Buy
0%
Hold
100%
Sell
0%

People Also Follow

This list is based on the watchlists of people on Stock Events who follow PRTA. It's not an investment recommendation.

Competitors

This list is an analysis based on recent market events. It's not an investment recommendation.
Biogen
BIIB
Mkt Cap28.61B
Biogen is a biotech firm that competes with Prothena in the neurodegenerative diseases space, particularly in developing therapies for Alzheimer's disease.
Lilly(Eli) &
LLY
Mkt Cap949.7B
Eli Lilly is a pharmaceutical company that competes with Prothena in the development of treatments for diseases like Alzheimer's, sharing a focus on neurodegenerative disorders.
Roche
RHHBY
Mkt Cap343.56B
Roche Holding AG competes in the neurodegenerative disease market, particularly in Alzheimer's and Parkinson's disease treatments, areas of focus for Prothena.
Abbvie
ABBV
Mkt Cap381.1B
AbbVie competes with Prothena in researching therapies for neurological disorders, including Alzheimer's and Parkinson's diseases.
AMGEN
AMGN
Mkt Cap183.12B
Amgen is involved in developing treatments for serious neurological diseases, competing with Prothena in the neurodegenerative disease research field.
Pfizer
PFE
Mkt Cap147.62B
Pfizer is a global pharmaceutical company that has initiatives in neurodegenerative diseases, making it a competitor to Prothena in the Alzheimer's and Parkinson's disease areas.
Novartis
NVS
Mkt Cap290.05B
Novartis AG competes with Prothena in the development of novel therapies for neurodegenerative diseases, including Alzheimer's and Parkinson's.
Merck
MRK
Mkt Cap302.33B
Merck & Co., Inc. is involved in the development of treatments for Alzheimer's disease, directly competing with Prothena's focus on neurodegenerative disorders.
Ionis Pharmaceuticals
IONS
Mkt Cap12.49B
Ionis Pharmaceuticals, Inc. competes with Prothena in developing RNA-targeted therapies for diseases, including neurodegenerative disorders.

About

Prothena Corporation plc, a late-stage clinical biotechnology company, focuses on discovery and development of novel therapies to treat diseases caused by protein dysregulation. Its product pipeline includes Prasinezumab, an investigational humanized monoclonal antibody which is in Phase 3 clinical trial for the treatment of parkinson's disease and other synucleinopathies. The company also develops Coramitug, an investigational antibody, which is in Phase 3 clinical trial for the treatment of transthyretin amyloidosis; BMS-986446, an anti-tau antibody which is in Phase 2 clinical trial to treat Alzheimer's disease; PRX019, an investigational antibody which is in Phase 1 clinical trial for the treatment of neurodegenerative diseases; and PRX123, a Dual Aß-Tau Vaccine, which is in preclinical trial for treating Alzheimer's disease. In addition, it develops discovery- and late-preclinical-stage programs include TDP-43 CYTOPE for the treatment of amyotrophic lateral sclerosis; PRX012, a next-generation anti-Aß antibody which is in phase 1 clinical trial to treat Alzheimer's disease; and PRX012-TfR, a preclinical program for the treatment of Alzheimer's disease. It has a license, development, and commercialization agreement with F. Hoffmann-La Roche Ltd. and Hoffmann-La Roche Inc. to develop and commercialize antibodies that target a-synuclein, including prasinezumab; and master collaboration agreement with Bristol Myers Squibb to develop and commercialize antibodies targeting tau, TDP-43. Prothena Corporation plc was incorporated in 2012 and is based in Dublin, Ireland.
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CEO
Dr. Gene G. Kinney Ph.D.
Employees
163
Country
Ireland
ISIN
IE00B91XRN20

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FAQ

What is Prothena stock price today?
The current price of PRTA is $9.53 USD — it has decreased by -3.05% in the past 24 hours. Watch Prothena stock price performance more closely on the chart.
What is Prothena stock ticker?
Depending on the exchange, the stock ticker may vary. For instance, on exchange Prothena stocks are traded under the ticker PRTA.
Is Prothena stock price growing?
PRTA stock has risen by +4.74% compared to the previous week, the month change is a -11.63% fall, over the last year Prothena has showed a +44.38% increase.
What is Prothena market cap?
Today Prothena has the market capitalization of 513.03M
When is the next Prothena earnings date?
Prothena is going to release the next earnings report on August 10, 2026.
What were Prothena earnings last quarter?
PRTA earnings for the last quarter are 0.6 USD per share, whereas the estimation was -0.35 USD resulting in a +272.25% surprise. The estimated earnings for the next quarter are N/A USD per share.
What is Prothena revenue for the last year?
Prothena revenue for the last year amounts to 19.37M USD.
What is Prothena net income for the last year?
PRTA net income for the last year is -488.18M USD.
How many employees does Prothena have?
As of May 26, 2026, the company has 163 employees.
In which sector is Prothena located?
Prothena operates in the Health & Wellness sector.
When did Prothena complete a stock split?
Prothena has not had any recent stock splits.
Where is Prothena headquartered?
Prothena is headquartered in Dublin, Ireland.