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INDICATIVE · SAMPLE DATA
PRTA$9.8359

Prothena Corporation PLC

Biotechnology & Medical ResearchVerified

Capital Structure and Liquidity Prothena maintains a strong liquidity position with $307.5 million in cash and equivalents, representing 94% of its total assets of $326.8 million. The company has no long-term debt and a debt-to-equity ratio of 0.0, indicating a conservative capital structure. The current ratio of 7.72 suggests the company has ample short-term liquidity to cover its liabilities. However, the company reported negative operating cash flow of $163.6 million and free cash flow of $243.3 million, reflecting ongoing operational losses. ### Profitability and Returns Prothena is currently unprofitable, with a net loss of $244.1 million and an operating loss of $214.6 million in the latest reporting period. The company's return on equity (ROE) is -87.03%, and its return on assets (ROA) is -7.47%, both significantly below the industry median for biotechnology firms. These metrics indicate that the company is not generating returns for shareholders or effectively utilizing its assets. ### Segments and Geographic Exposure Prothena's revenue is primarily derived from its pipeline of therapeutic candidates for neurodegenerative diseases, with no disclosed geographic revenue breakdown in the latest financial data. The company does not report segment-specific financials, suggesting a concentrated business model focused on a single therapeutic area. ### Growth Trajectory The company's revenue of $9.7 million in the latest period is relatively flat compared to prior periods, indicating limited top-line growth. Analysts have assigned a mean price target of $21.40, with a median of $20.00, suggesting a potential upside of over 100% from the current market price of $9.83. However, the company has not reported positive earnings, and its high price-to-revenue ratio of 22.89 reflects investor optimism about future growth potential. ### Risk Factors Prothena faces significant financial risk due to its consistent net losses and negative cash flows. The company has no long-term debt, but its reliance on cash reserves to fund operations increases the risk of liquidity constraints if clinical trials or regulatory approvals are delayed. The risk assessment indicates low dilution risk, with no immediate filing-based dilution flags detected. However, the company's high price-to-book ratio of 1.89 suggests that the market is valuing the company based on intangible assets and future expectations rather than current financial performance. ### Recent Events Recent filings and transcripts have not indicated any major changes in the company's strategic direction or financial outlook. The company continues to focus on its pipeline of therapeutic candidates, with no new product launches or significant partnerships disclosed in the latest data.

30-day price · PRTA-0.48 (-4.7%)
Low$9.02High$11.80Close$9.83As of22 May, 00:00 UTC
Profile
CompanyProthena Corporation PLC
TickerPRTA.O
SectorHealthcare
BusinessPharmaceuticals & Medical Research
Industry groupPharmaceuticals & Medical Research
IndustryBiotechnology & Medical Research
AI analysis

Business. Prothena Corporation PLC is a biotechnology company focused on the discovery, development, and commercialization of novel therapeutics for the treatment of neurodegenerative diseases, including Parkinson's disease and Alzheimer's disease.

Classification. Prothena is classified under the Healthcare economic sector, within the Pharmaceuticals & Medical Research business sector, and the Biotechnology & Medical Research industry, with a classification confidence of 0.92.

### Capital Structure and Liquidity Prothena maintains a strong liquidity position with $307.5 million in cash and equivalents, representing 94% of its total assets of $326.8 million. The company has no long-term debt and a debt-to-equity ratio of 0.0, indicating a conservative capital structure. The current ratio of 7.72 suggests the company has ample short-term liquidity to cover its liabilities. However, the company reported negative operating cash flow of $163.6 million and free cash flow of $243.3 million, reflecting ongoing operational losses. ### Profitability and Returns Prothena is currently unprofitable, with a net loss of $244.1 million and an operating loss of $214.6 million in the latest reporting period. The company's return on equity (ROE) is -87.03%, and its return on assets (ROA) is -7.47%, both significantly below the industry median for biotechnology firms. These metrics indicate that the company is not generating returns for shareholders or effectively utilizing its assets. ### Segments and Geographic Exposure Prothena's revenue is primarily derived from its pipeline of therapeutic candidates for neurodegenerative diseases, with no disclosed geographic revenue breakdown in the latest financial data. The company does not report segment-specific financials, suggesting a concentrated business model focused on a single therapeutic area. ### Growth Trajectory The company's revenue of $9.7 million in the latest period is relatively flat compared to prior periods, indicating limited top-line growth. Analysts have assigned a mean price target of $21.40, with a median of $20.00, suggesting a potential upside of over 100% from the current market price of $9.83. However, the company has not reported positive earnings, and its high price-to-revenue ratio of 22.89 reflects investor optimism about future growth potential. ### Risk Factors Prothena faces significant financial risk due to its consistent net losses and negative cash flows. The company has no long-term debt, but its reliance on cash reserves to fund operations increases the risk of liquidity constraints if clinical trials or regulatory approvals are delayed. The risk assessment indicates low dilution risk, with no immediate filing-based dilution flags detected. However, the company's high price-to-book ratio of 1.89 suggests that the market is valuing the company based on intangible assets and future expectations rather than current financial performance. ### Recent Events Recent filings and transcripts have not indicated any major changes in the company's strategic direction or financial outlook. The company continues to focus on its pipeline of therapeutic candidates, with no new product launches or significant partnerships disclosed in the latest data.
Key takeaways
  • Prothena has strong liquidity with $307.5 million in cash and no long-term debt.
  • The company is unprofitable, with a net loss of $244.1 million and negative returns on equity and assets.
  • The company's revenue is concentrated in a single therapeutic area, with no geographic diversification disclosed.
  • Analysts have assigned a mean price target of $21.40, suggesting a potential upside of over 100%.
  • The company's high price-to-revenue ratio of 22.89 reflects investor optimism about future growth potential.
  • Prothena faces financial risk due to consistent net losses and negative cash flows.
  • --
  • ## RATIONALES
Financial snapshot
PeriodHA-latest
CurrencyUSD
Revenue$9.7M
Gross profit
Operating income-$214.6M
Net income-$244.1M
R&D
SG&A
D&A
SBC
Operating cash flow-$163.6M
CapEx-$138.0k
Free cash flow-$243.3M
Total assets$326.8M
Total liabilities$46.3M
Total equity$280.5M
Cash & equivalents$307.5M
Long-term debt$0.00
Valuation
Market price$9.83
Market cap$529.2M
Enterprise value$221.6M
P/E
Reported non-GAAP P/E
EV/Revenue22.9
EV/Op income
EV/OCF
P/B1.9
P/Tangible book1.9
Tangible book$280.5M
Net cash$307.5M
Current ratio7.7
Debt/Equity0.0
ROA-74.7%
ROE-87.0%
Cash conversion67.0%
CapEx/Revenue-1.4%
SBC/Revenue
Asset intensity
Dilution ratio0.0%
Risk assessment
Dilution riskLow
Liquidity riskLow
  • No immediate filing-based liquidity or dilution flags were detected.
Industry benchmarks
Activity: Pharmaceuticals & Medical Research · cohort 693 companies
MetricPRTAActivity
Op margin-2216.4%2.4% medp25 -91.8% · p75 12.5%bottom quartile
Net margin-2520.6%1.2% medp25 -98.4% · p75 10.4%bottom quartile
Gross margin45.6% medp25 29.8% · p75 66.7%
CapEx / revenue-1.4%-5.2% medp25 -15.8% · p75 -1.7%top quartile
Debt / equity0.0%9.3% medp25 0.1% · p75 43.8%bottom quartile
Observations
IR observations
Mean price target21.40 USD
Median price target20.00 USD
High price target36.00 USD
Low price target8.00 USD
Mean recommendation2.67 (1=strong buy, 5=strong sell)
Strong-buy count0.00
Buy count3.00
Hold count2.00
Sell count1.00
Strong-sell count0.00
Mean EPS estimate0.29 USD
Last actual EPS-4.53 USD
Source data
Underlying data the analysis-pipeline pulls and audits. Fetch timestamps + content hashes show when each source was last refreshed.
Company fundamentalsperiod financials
no public URL
2026-05-23 01:40 UTC#32114d40
Source: analysis-pipeline (hybrid)Generated: 2026-05-29 01:55 UTCJob: 99c9379d