Prothena Corporation plc logo

Prothena Corporation plc (PRTA)

Market Closed
2 Sep, 20:00
NASDAQ (NGS) NASDAQ (NGS)
$
9. 69
+0.08
+0.7804%
$
488.46M Market Cap
- P/E Ratio
- Div Yield
341,054 Volume
-2.73 Eps
$ 9.61
Previous Close
Add Transaction
Day Range
9.37 9.75
Year Range
7.73 11.8
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Summary

PRTA closed today higher at $9.69, an increase of 0.7804% from yesterday's close, completing a monthly decrease of -0.5647% or -$0.05. Over the past 12 months, PRTA stock gained 1.3075%.
PRTA is not paying dividends to its shareholders.
The last earnings report, released on May 07, 2026, exceeded the consensus estimates by 0.305%. On average, the company has surpassed earnings expectations by 0.5017%, based on the last three reports.
The stock of the company had never split.
The company's stock is traded on 6 different exchanges and in various currencies, with the primary listing on NASDAQ (NGS) (USD).

PRTA Chart

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PRTA's Q2 Loss Narrower Than Expected, Pipeline Progress in Focus

PRTA's Q2 Loss Narrower Than Expected, Pipeline Progress in Focus

Prothena beat adjusted Q2 loss estimates, reaffirmed 2026 cash-use guidance and highlights partner pipeline progress as a key milestone decision nears.

Zacks | 3 weeks ago
Prothena (PRTA) Reports Q2 Loss, Misses Revenue Estimates

Prothena (PRTA) Reports Q2 Loss, Misses Revenue Estimates

Prothena (PRTA) came out with a quarterly loss of $0.32 per share versus the Zacks Consensus Estimate of a loss of $0.39. This compares to a loss of $1.86 per share a year ago.

Zacks | 3 weeks ago
PRTA Stock Rises Nearly 11% in Six Months: What's Driving It?

PRTA Stock Rises Nearly 11% in Six Months: What's Driving It?

Prothena shares climb as late-stage partnered programs advance, milestone payments strengthen finances and its neurodegenerative pipeline continues to expand.

Zacks | 1 month ago

Prothena Corporation plc Investors

Name Quantity Cost Value Profit ($) Gain (%)
BZ
Brandon Zatopek Commonwealth Equity Services LLC
11,410 $111,700 $110,505.85 -$1,194.15 -1.07%
JD
Jim Dushek HARBOUR INVESTMENTS Inc.
1 $12.38 $9.68 -$2.7 -21.81%
FR
Fausto Rotundo Edgewood Management LLC
50,000 $540,856.8 $484,250 -$56,606.8 -10.47%
YA
Yinka Akinsola Blue Trust Inc.
33 $408.54 $319.77 -$88.77 -21.73%
PF
Phillip Fitzsimmons Hennion & Walsh Asset Management Inc.
90,795 $1.12M $877,987.65 -$238,508.25 -21.36%

Prothena Corporation plc (PRTA) FAQ

What is the stock price today?

The current price is $9.69.

On which exchange is it traded?

Prothena Corporation plc is listed on NASDAQ (NGS).

What is its stock symbol?

The ticker symbol is PRTA.

Does it pay dividends? What is the current yield?

It does not pay dividends to its shareholders.

What is its market cap?

As of today, the market cap is 488.46M.

Has Prothena Corporation plc ever had a stock split?

No, there has never been a stock split.

Prothena Corporation plc Profile

Biotechnology Industry
Healthcare Sector
Gene G. Kinney CEO
NASDAQ (NGS) Exchange
G72800108 CUSIP
IE Country
67 Employees
- Last Dividend
- Last Split
21 Dec 2012 IPO Date

Overview

Prothena Corporation plc is a pioneering force in the biotechnology space, concentrating its efforts on the discovery and development of groundbreaking therapies targeted at diseases caused by protein dysregulation. As a late-stage clinical biotechnology entity based in Dublin, Ireland, and incorporated in 2012, Prothena has made significant strides in addressing some of the most challenging neurodegenerative diseases and related conditions. Leveraging a deep understanding of protein dysregulation, the company has embarked on several ambitious projects, including clinical trials aimed at tackling conditions such as AL amyloidosis, Parkinson's disease, ATTR amyloidosis, and Alzheimer’s disease through innovative therapeutic antibodies and vaccines. With a robust pipeline fueled by both in-house research and strategic partnerships with industry giants such as F. Hoffmann-La Roche Ltd. and Bristol-Myers Squibb, Prothena stands at the forefront of developing promising treatments for diseases with substantial unmet medical needs.

Products and Services

Prothena Corporation plc's dedication to addressing protein dysregulation has culminated in a diverse portfolio of investigational therapies at various stages of clinical development. These include:

  • Birtamimab: A humanized antibody in Phase III clinical trials aimed at treating AL amyloidosis, a condition characterized by the abnormal deposition of amyloid proteins in tissues and organs.
  • Prasinezumab: In partnership with F. Hoffmann-La Roche Ltd., this humanized monoclonal antibody targets α-synuclein and is currently in Phase IIb clinical trials for Parkinson's disease and other synucleinopathies, diseases related to the accumulation of α-synuclein protein in the brain.
  • NNC6019: An antibody in Phase II clinical development for the treatment of ATTR amyloidosis, a disease where misfolded transthyretin proteins accumulate as amyloid fibrils in various organs.
  • BMS-986446 and PRX012: Both in Phase I clinical trials, these antibodies are developed in collaboration with Bristol-Myers Squibb, targeting tau and amyloid-beta proteins, respectively, for the treatment of Alzheimer’s disease.
  • PRX123: A dual Aβ-Tau vaccine for Alzheimer's disease prevention and treatment, which is currently in the discovery and preclinical stage, showcasing Prothena’s forward-thinking in addressing the dual pathological features of Alzheimer's disease.
  • PRX019: Targeting neurodegenerative diseases, this antibody is designed to combat conditions characterized by the pathological aggregation of misfolded proteins, currently in preclinical development.
  • TDP-43: Focused on the treatment of amyotrophic lateral sclerosis (ALS), this program is in the early stages of development, aiming at a protein implicated in the disease's pathology.

These investigational products reflect Prothena’s commitment to innovative treatments that address the underlying causes of debilitating diseases, with the potential to significantly impact patient care.

Contact Information

Address: 77 Sir John Rogerson’s Quay
Phone: 353 1 236 2500