Is PRGO or PRTA more undervalued in 2026?

CirclFi compares Perrigo Company plc (PRGO) and Prothena Corporation plc (PRTA) using 13 institutional-grade valuation models. PRGO has a Quality of Company score of 5.9/10 while PRTA scores 6.8/10.

Which is a better buy — PRGO or PRTA?

Compare intrinsic values from 13 independent models against current market prices. CirclFi also calculates Value Trap scores. This is not financial advice — conduct your own analysis.

How do PRGO and PRTA valuations compare?

PRGO at $11.05 and PRTA at $10.18 are compared across Bayesian DCF, EPV, EROIC Spread, First Chicago, Markov DDM, and 8 additional models.

PRGO vs PRTA Valuation Comparison 2026 — Intrinsic Value Analysis

PRGO

Pharmaceutical Preparations

Perrigo Company plc

Quality

5.9

out of 10

Value Trap

LOW

Price

$11.05

Last close

Models

11/13

Active

PRTA

Pharmaceutical Preparations

Prothena Corporation plc

Quality

6.8

out of 10

Value Trap

LOW

Price

$10.18

Last close

Models

11/13

Active

Model-by-Model Comparison

Model	Type	PRGO Fair Value	PRGO Upside	PRTA Fair Value	PRTA Upside
Bayesian DCF	Intrinsic	$2.94	-73.7%	$4.35	-57.3%
Earnings Power Value	Intrinsic	—	—	$6.84	-35.7%
EROIC Spread	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
First Chicago	Scenario	$•••.••	••.•%	$•••.••	••.•%
Markov DDM	Intrinsic	$14.77	+33.7%	—	—
ML-RIV	Intrinsic	$•••.••	••.•%	$•••.••	••.•%
Dynamic NAV	Asset-Based	$•••.••	••.•%	$•••.••	••.•%
PWERM	Option-Based	$•••.••	••.•%	$•••.••	••.•%
Regime Cross-Sectional	Relative	$•••.••	••.•%	$•••.••	••.•%
Sentiment SOTP	Hybrid	$•••.••	••.•%	$•••.••	••.•%
CUCE Ensemble	Ensemble	$•••.••	••.•%	$•••.••	••.•%
FTNN Topology	Relative	$•••.••	••.•%	$•••.••	••.•%
RCMH-DCF	Intrinsic	$•••.••	••.•%	$•••.••	••.•%

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PRGO vs PRTA — Which Stock Is More Undervalued?

PRTA scores higher with a 6.8/10 quality rating vs PRGO's 5.9/10. Both stocks are analyzed daily using SEC EDGAR filings across 13 independent models.

Comparing Perrigo Company plc (PRGO) and Prothena Corporation plc (PRTA) across 13 institutional-grade valuation models reveals how each company's intrinsic value stacks up against its market price. CirclFi's engine processes SEC EDGAR 10-K and 10-Q filings, FRED macroeconomic data, and GDELT news sentiment to generate independent fair value estimates daily.

PRGO currently trades at $11.05 with a QOC of 5.9/10, while PRTA trades at $10.18 with a QOC of 6.8/10.

Both companies are analyzed with models spanning intrinsic (Bayesian DCF, EPV), scenario-based (First Chicago), regime-switching (Markov DDM, RCMH-DCF), machine learning (ML-RIV, FTNN Topology), and ensemble methods (CUCE).