Prothena Corporation plc
$8.92
-2.9%Prothena Corporation plc, a late-stage clinical company, focuses on discovery and development of novel therapies for life-threatening diseases in the United States. The company is involved in developing Birtamimab, an investigational humanized antibody that is in Phase III clinical trial for the treatment of AL amyloidosis; Prasinezumab, a humanized monoclonal antibody, which is in Phase IIb clinical trial for the treatment of Parkinson's disease; PRX004 that completed Phase I clinical trial for the treatment of Transthyretin amyloidosis; and PRX005, which is in Phase I clinical trial for the treatment of Alzheimer's disease. Its discovery and preclinical programs include PRX012 for the treatment of Alzheimer's disease; and dual Aß-Tau vaccine for the treatment and prevention of Alzheimer's disease. Prothena Corporation plc 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 alpha-synuclein; and a collaboration agreement with Bristol-Myers Squibb to develop antibodies. The company was founded in 2012 and is based in Dublin, Ireland.
At a Glance
Live SnapshotIntrinsic Alpha Methodology
Thesis Lenses
Signal
Medium confidenceValuation multiple is compressed (P/E -2.0).
Valuation inputs: P/E -2.0, earnings yield N/A, momentum -2.9%.
If multiples stay elevated while momentum fades, downside repricing risk rises.
Driver
High confidenceReturn profile is soft (ROE -87.0%, ROIC -63.9%).
Profitability stack: net margin -25.2%, ROE -87.0%, ROIC -63.9%.
Quality deterioration often appears in margins before it shows up in headline EPS.
Risk
High confidenceRisk profile is balanced but has notable pressure points to monitor.
Risk factors: liabilities/assets +14.2%, momentum -2.9%, net margin -25.2%.
Higher leverage with weak momentum and thin margins can amplify drawdown severity.
Prothena Corporation plc Market vs Earnings Trajectory
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Prothena Corporation plc Fair Value Envelope
Prothena Corporation plc Profit Bridge
Profitability Analysis
Gross Margin
Exceptional pricing power and cost management. The company retains over half of revenue after direct costs.
Operating Margin
Operating losses indicate the core business is unprofitable. Requires restructuring or revenue growth.
Net Profit Margin
Net losses indicate the company is burning cash. Sustainability depends on path to profitability.
Profitability Insight
Margin squeeze alert: Healthy gross margins but weak operating margins suggest excessive operating expenses. Cost optimization could unlock significant value.
Prothena Corporation plc Cash Conversion Engine
Cash Flow Quality Analysis
FCF Conversion Rate
Moderate conversion rate. Some gap between earnings and cash flow may warrant investigation into working capital or non-cash items.
CapEx Intensity
Asset-light business model. Low capital requirements leave more cash available for shareholders and growth investments.
FCF Growth Trend
Declining FCF warrants attention. Investigate whether due to temporary factors or fundamental deterioration.
Working Capital Impact
Minimal working capital impact on FCF. Changes in operating assets and liabilities well-managed.
Cash Flow Quality Insight
Working capital strain: Significant cash tied up in operations. Monitor receivables collection, inventory turns, and payment terms to optimize cash conversion cycle.
Prothena Corporation plc Funding & Solvency Profile
Financial Health Analysis
Current Ratio
Excellent liquidity position. The company can easily cover its short-term obligations with substantial cushion.
Debt-to-Equity Ratio
Conservative capital structure. The company relies primarily on equity financing, indicating low financial risk.
Working Capital
Strong working capital position provides significant operational flexibility and financial cushion.
Asset Composition
Asset-light business model with high liquidity. Majority of assets are easily convertible to cash.
Financial Health Insight
Strong financial foundation: Excellent liquidity combined with conservative leverage suggests the company is well-positioned to weather economic uncertainties and fund growth opportunities.
Prothena Corporation plc Street Expectations Map
Wall Street analysts project that PRTA stock may rise significantly over the coming 12 months. The consensus 1-year price target stands at 19.00, with estimates ranging from a low of 19.00 to a high of 19.00.
The consensus 1-year price target stands at 19.00, with estimates ranging from a low of 19.00 to a high of 19.00.
Analyst Consensus Analysis
Upside Potential
Substantial upside potential. Analysts see significant value gap, suggesting the stock may be materially undervalued at current levels.
Analyst Agreement
High analyst agreement. Narrow target range indicates strong consensus on valuation, suggesting clear investment thesis and predictable outlook.
Analyst Conviction
Strong buy conviction: High upside with tight consensus suggests compelling investment opportunity backed by analyst confidence.
Market Sentiment Insight
Rare opportunity: Exceptional upside potential with strong analyst consensus creates a compelling setup. The combination of significant price target premium and tight agreement suggests high-conviction undervaluation that may attract institutional capital.
Prothena Corporation plc Insider Positioning
During the last 12 months, insiders have purchased $981K worth of PRTA shares, with no selling activity reported.
3 Months
100.0K
981.30K
0
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+981K
+$981K
3-6 Months
0
0.00
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0.00
+0
+$0
6-9 Months
0
0.00
0
0.00
+0
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9-12 Months
0
0.00
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Top Buyers
Scully William P
10 Percent Owner
$981K
Top Sellers
No selling activity
Insider Activity Analysis
Net Insider Sentiment
Strong bullish signal with $981K net buying. Insiders are aggressively accumulating shares, suggesting significant confidence in future prospects.
Buy/Sell Ratio
Perfect buy/sell ratio. Only buying activity with zero selling—the most bullish possible insider signal.
Recent Trend (3 Months)
Very strong recent buying momentum. Recent insider purchases significantly outpace sales, suggesting near-term optimism.
Insider Participation
1 insider buyers vs. 0 sellers. Broad-based buying across management team suggests widespread confidence.
Insider Activity Insight
Unanimous insider buying: Zero selling combined with active buying is rare and typically very bullish. Insiders appear to see significant upside with limited downside risk.
No Dividend Yield Data
PRTA has not reported any dividend yield values in the available annual periods.
prta Dividend History
Learning Layer
Related Guides
Build conviction on PRTA by pairing this stock hub with focused valuation guides.
Research Paths
Snapshot
Start with context, operating signals, and key market metrics.
Value Model
Stress test fair value across bear, base, and bull assumptions.
Statements
Validate revenue quality, margins, and balance sheet durability.
Earnings Call
Read management commentary and compare it with reported outcomes.
Dividends
Check payout sustainability and long-term distribution behavior.
Analyst Expectations
Review consensus spread and where estimate risk is concentrated.