PROTHENA CORP PUBLIC LTD CO (PRTA)
About PROTHENA CORP PUBLIC LTD CO
Prothena Corp PLC is a late-stage clinical biotechnology company that focuses on protein dysregulation and a pipeline of investigational therapeutics with the potential to change the course of devastating neurodegenerative and rare and peripheral amyloid diseases. Prothena is developing and applying its proprietary CYTOPE technology to target a broad spectrum of intracellular disease pathways in the brain and periphery. The company's pipeline includes both wholly-owned and partnered programs like Prasinezumab, Coramitug (PRX004), BMS-986446 (PRX005), PRX019, TDP-43 CYTOPE, and PRX012-TfR, being developed for the potential treatment of Parkinson's disease, ATTR amyloidosis with cardiomyopathy, Alzheimer's disease, Amyotrophic lateral sclerosis (ALS), and other neurodegenerative diseases.
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Financial summary
- Revenue FY2025
- $9.7M
- Net income
- -$244.1M
- Total assets
- $326.8M
- Market cap
- $460.2M
- Operating margin
- -2216.4%
- Net margin
- -2520.6%
Source: SEC EDGAR · updated Jun 7, 2026
Revenue & profit trend
Financial statements
Income statement
- Revenue
- $9.7M
- Operating expenses
- $224.3M
- Operating income
- -$214.6M
- Income tax
- $43.3M
- Net income
- -$244.1M
- EPS (basic)
- $-4.53
- EPS (diluted)
- $-4.53
Balance sheet
- Total assets
- $326.8M
- Current assets
- $315.2M
- Total liabilities
- $46.3M
- Current liabilities
- $40.8M
- Shareholders’ equity
- $280.5M
Cash flow
- Operating cash flow
- -$163.6M
- Investing cash flow
- -$138.0K
- Financing cash flow
- -$139.0K
- Net cash flow
- -$163.9M
Statements via Polygon.io (SEC filings)
15-minute delayed · data by Polygon.io
Past year · hover for prices
52-week range
- Market cap
- $460.2M
- EPS (diluted)
- $-4.53
- Shares outstanding
- 52.6M
- Open
- —
- Day range
- –
- Prev close
- —
- Volume
- —
- IPO date
- Dec 18, 2012
Prothena Corp Public Ltd Co (PRTA) Stock Price
- Reported a net loss of $244.1M in FY2025.
- Revenue declined 95% from FY2021 to FY2025.
- Trading 24% below its 52-week high.
Automatically generated from public filings and market data. Informational only — not investment advice or a recommendation to buy or sell any security.
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Prothena Corp Public Ltd Co: frequently asked questions
Is Prothena Corp Public Ltd Co an American company?
Prothena Corp Public Ltd Co is a US-based company, listed in the americancompanies.com directory of American companies. Its American-origin credentials have not yet been independently verified.
Is Prothena Corp Public Ltd Co publicly traded?
Yes — Prothena Corp Public Ltd Co is a publicly traded company. Its stock trades under the ticker symbol PRTA on the NASDAQ.
What does Prothena Corp Public Ltd Co do?
Prothena Corp Public Ltd Co is an American Pharmaceuticals company in the Health & Beauty sector.
