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Prothena Corporation plc(PRTA)
Advisory History & Simulated Performance *
*as per simulation (see disclosures)- ALL
- 1Y
- 1M
- 1W
- BUY Advisory
- SELL Advisory (Profit)
- SELL Advisory (Loss)
- Profit
- Loss
- PASS (Skip)
Advisory Performance History (Simulated)
Upturn Advisory & Investor View for PRTA
09/18/2026: PRTA (1-star) is a SELL. SELL for 3 days. Simulated Profits (-11.87%). Updated daily EoD!
How to Read the Upturn Advisory
The Upturn Star Rating and the current BUY, SELL, or PASS advisory are generated by Upturn’s AI advisory engine based on proprietary signal analysis, price behavior, advisory history, and historical signal performance.
Company fundamentals, valuation, risks, and news provide supporting context about the business.
Price Behavior

Downtrend
The stock has experienced a sustained decline in price over recent periods.

Moderately Choppy
The stock has experienced noticeable price swings while retaining some directional structure.
Analysis of Past Performance
Type Stock | Historic Profit -26.51% | Avg. Invested days 26 | Today’s Advisory SELL |
Upturn Advisory Rating ![]() | Upturn Advisory Performance | Stock Returns Performance |
Upturn Scorecard
Upturn Star Rating 
Company Fundamentals 
Financial Health Rating 
Growth Momentum Score 
Ownership 
Top 5 Institutional Investors
Unit Economics (Per $1K Revenue) 
Economic Dimensions
Quantitative Style Profile 
Style Classification
Quality Focused
Key Highlights
Company Size Small-Cap Stock | Market Capitalization 440.47M USD | Price to earnings Ratio - | 1Y Target Price 21.4 |
Price to earnings Ratio - | 1Y Target Price 21.4 | ||
Volume (30-day avg) 409.5K shares | Beta -0.33 | 52 Weeks Range 7.73 - 11.80 | Updated Date 09/19/2026 |
52 Weeks Range 7.73 - 11.80 | Updated Date 09/19/2026 | ||
Dividends yield (FY) - | Basic EPS (TTM) -0.82 |
Analyzing Revenue: Products, Geography and Growth
Revenue by Products
Product revenue - Year on Year
Valuation
Trailing PE - | Forward PE 10.63 | Enterprise Value 159.27M | Price to Sales(TTM) 8.08 |
Enterprise Value 159.27M | Price to Sales(TTM) 8.08 | ||
Enterprise Value to Revenue 2.92 | Enterprise Value to EBITDA -3.58 | Shares Outstanding 51.34M | Shares Floating 34.91M |
Shares Outstanding 51.34M | Shares Floating 34.91M | ||
Percent Insiders 22.15 | Percent Institutions 93.28 |
Financial Metrics
🧭 Investment Snapshot
Total Revenue (Scale)
Total money earned from selling products or services before any costs. It is needed to understand the scale of the business and its ability to generate income.
Net Income (Profit)
Final profit after all expenses, interest, and taxes are deducted. It is needed to determine the overall profitability available to shareholders.
Free Cash Flow (Cash Strength)
Cash remaining after operating activities and capital expenditures, showing cash available for growth. It is needed to evaluate the company’s ability to invest, pay dividends, or reduce debt.
📈 Growth & Strength
Operating Income (Core Profit)
Profit from core operations after deducting all operating expenses. It is needed to measure how efficiently the company runs its primary business activities.
EBITDA (Cash Earnings)
Earnings before interest, taxes, depreciation, and amortization, indicating operating cash potential. It is needed to compare operating performance across companies without accounting or financing differences.
Gross Profit (Unit Profitability)
Revenue minus cost of revenue, showing profit after direct production costs. It is needed to evaluate core business profitability before overhead expenses.
🛡️ Financial Safety
Cash (Liquidity Buffer)
Total cash and cash equivalents on hand. It is needed to evaluate immediate liquidity and financial flexibility.
Total Debt (Leverage Risk)
Total debt including both short-term and long-term components. It is needed to assess the company’s leverage and financial risk.
Net Working Capital (Short-Term Health)
Current assets minus current liabilities, indicating short-term liquidity strength. It is needed to assess whether the company can meet its short-term obligations.
🧱 Balance Sheet Strength
Stockholder Equity (Net Worth)
Total equity value held by shareholders. It is needed to understand the net worth of the company from the owners’ perspective.
Total Assets (Asset Base)
The full value of everything the company owns, including cash, inventory, equipment, and investments. It is needed to understand the resource base used to generate revenue.
Income Before Tax (Pre-Tax Earnings)
Income before provision for income taxes. It is needed to analyze profitability independent of tax structures.
⚙️ Cost & Drag Factors
Cost of Revenue (Production Cost)
Direct costs required to produce and deliver the products or services sold. It is needed to assess efficiency in production and service delivery.
Total Operating Expenses (Operating Cost)
Indirect costs of running the business such as salaries, marketing, and administration. It is needed to understand how much it costs to sustain ongoing business operations.
Income Tax Expense (Tax Drag)
Amount of taxes paid or payable to the government. It is needed to evaluate the impact of taxation on overall profitability.
About Prothena Corporation plc
Exchange NASDAQ | Headquarters - | ||
IPO Launch date 2012-12-21 | President, CEO & Director Dr. Gene G. Kinney Ph.D. | ||
Sector Healthcare | Industry Biotechnology | Full time employees 67 | Website https://www.prothena.com |
Full time employees 67 | Website https://www.prothena.com | ||
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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