DCF Valuation
Prothena Corporation plc (PRTA) DCF Valuation — Is PRTA overvalued?
The estimated DCF fair value of one Prothena Corporation plc (PRTA) share is $5.44. Compared to the current market price of $8.49, the stock is overvalued by 36.0%.
DCF fair value
$5.44
Market price
$8.49
Upside / downside
−36.0%
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Prothena Corporation plc (PRTA) DCF valuation FAQ
What is the DCF fair value of Prothena Corporation plc (PRTA)?
The discounted-cash-flow model estimates the intrinsic fair value of one Prothena Corporation plc (PRTA) share at $5.44, based on a 10-year projection of its cash flows converging to Damodaran industry averages.
Is Prothena Corporation plc (PRTA) overvalued or undervalued?
Against the current market price of $8.49, the DCF fair value of $5.44 implies PRTA is overvalued by 36.0%.
How is the PRTA DCF value calculated?
It is a 10-year discounted-cash-flow estimate built from Prothena Corporation plc's reported fundamentals, with terminal assumptions anchored to Damodaran NYU industry datasets. The market price refreshes daily; the DCF fair value updates when Prothena Corporation plc files a new quarterly or annual report.
How this PRTA valuation is built
The model projects ten years of Prothena Corporation plc's free cash flow to the firm and discounts each year at its own cost of capital. Rather than assuming today's growth and margins persist forever, a moat-scoring step — weighing Prothena Corporation plc's ROIC-versus-WACC spread, gross-margin trend, and reinvestment efficiency — decides how many years the business holds its edge before its economics mean-revert toward the Damodaran NYU benchmarks for its industry.
WACC is rebuilt each year from an unlevered-then-relevered beta and the company's evolving capital structure; terminal value uses the Gordon growth model with a reinvestment rate tied to the return earned on new capital (goodwill stripped out to reflect operating efficiency). Every assumption — growth, margins, tax, leverage, convergence timing — is editable, and running the full interactive model adds a 10,000-draw Monte Carlo simulation and WACC-versus-terminal-growth sensitivity heatmaps.
The market price refreshes daily; the DCF fair value updates when Prothena Corporation plc files a new quarterly or annual report. For educational/informational purposes only — not investment advice. Last updated 2026-08-06.