What Is Prothena Corporation plc (PRTA) Worth in 2026?
According to the CirclFi Deep Alpha Valuation Engine, Prothena Corporation plc presents a highly debated valuation profile at its current price of $8.64. The composite intrinsic value is estimated at $8.45 (-2.2% average upside), masking a wide model spread between the 4 bullish models and 4 bearish models. Model dispersion is worth noting: EROIC targets $16.25 (+88.1%), versus ML-RIV at $0.40 (-95.3%). This +183.4% range highlights the importance of multi-model analysis rather than relying on any single methodology.
What Do the Models Say About PRTA?
11 of 13 models are currently active for PRTA. Of these, 6 models suggest upside while 5 models suggest overvaluation. The Bayesian DCF estimates PRTA's intrinsic value at $5.31, implying -38.5% downside from the current price. See which stocks rank higher →
How Does PRTA Rank in Pharmaceutical Preparations?
Among 469 Pharmaceutical Preparations stocks, PRTA ranks #52 by Quality of Company score. CirclFi's QOC score of 7.4/10 evaluates 32 fundamental signals. A score of 7.4 indicates above-average quality.
See all Most Undervalued Pharmaceutical Preparations Stocks →
As a biopharma enterprise, Prothena Corporation plc operates in a sector where pipeline depth and stage distribution is a critical driver of valuation. Investors evaluating PRTA should weigh these sector-specific dynamics alongside our model-derived fair values.
Is PRTA a Value Trap?
CirclFi's Value Trap algorithm assigns PRTA a score of 12/100 (SAFE). This indicates minimal risk. Fundamentals are healthy. The score cross-references apparent undervaluation against fundamental deterioration signals. Browse lowest value-trap stocks →
Multi-Model Methodology
11 of 13 models are active for Prothena Corporation plc. Broad coverage provides high confidence. Each model applies a fundamentally different valuation philosophy. See the complete methodology →
According to the CirclFi 32-factor quality framework, Prothena Corporation plc's fundamental quality profile registers 7.4/10. This respectable score captures the company's profitability depth, growth consistency, balance sheet resilience, and shareholder return track record.
The gap between the most bullish and bearish model spans +183.4% — demonstrating why single-model analysis is dangerous. Browse all stocks with 13-model coverage →
Data Sources & Confidence
Every PRTA valuation is built from SEC EDGAR XBRL filings — 700+ standardized financial tags. Macroeconomic context from FRED calibrates discount rates, while GDELT news sentiment feeds into our Sentiment SOTP model. All pipelines run daily. Read the complete data methodology →
Across PRTA's 11 active models, average confidence is 23%. Lower confidence may reflect limited history or high volatility.
CirclFi's output is a research starting point, not a buy/sell signal. All data updates daily. Read the full methodology →
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