White Mountains Insurance Group Ltd
NYSE: WTM · FINANCIAL SERVICES · INSURANCE - PROPERTY & CASUALTY
Updated 2026-06-05
White Mountains Insurance Group Ltd (WTM) Stock Valuation Analysis
Fair value estimate, historical valuation range, and quality signals for WTM.
Valued
Valuation reasonably reflects current fundamentals. Limited margin of safety at these levels.
WTM historical valuation range
Where current P/E sits in WTM's own 5Y range.
WTM intrinsic value (DCF)
DCF-based fair value estimate vs current market price.
Standard discounted cash flow models produce unreliable output for unprofitable or near-breakeven companies. Revenue-based multiples such as P/S and EV/Sales, combined with the historical valuation position above, give a more reliable read for this stock.
Intrinsic value calculated using discounted cash flow (DCF) model based on projected free cash flows, discount rate, and terminal growth assumptions. A positive margin of safety indicates the current price is below estimated fair value, providing a cushion against estimation error.
WTM valuation signals
Quick-read green flags, caution flags, and risks based on current metrics.
P/E Ratio — History
Current: 5.00x
P/S Ratio — History
Current: 1.78x
Is WTM overvalued in 2026?
White Mountains Insurance Group Ltd (WTM) currently trades at $2,133.58 per share with a market capitalization of $5,012,904,000.00. Based on our multi-factor framework, the stock trades at a fair valuation with a Smart Value Score of 63/100. This score blends growth quality, financial health, and price attractiveness into a single institutional-grade read.
The stock trades at a P/E ratio of 5.0x, below its 5-year median of 5.3x. The PEG ratio of 0.81 suggests earnings growth is outpacing the multiple, a classic sign of undervaluation.
Looking at its own history, WTM is currently trading cheaper than 78% of the last 5Y on P/E. This places it in the 22th percentile of its historical range, a level that has historically coincided with attractive entry points.
A standard DCF model does not produce reliable output for WTM under current conditions. For unprofitable or near-breakeven companies, revenue-based multiples such as EV/Sales and historical P/S percentile are more informative than intrinsic value calculations.
Financial quality is a concern. The Piotroski F-Score of 3/9 flags weakening fundamentals that deserve closer scrutiny before the valuation case can be fully trusted.
Bottom line: WTM trades at a fair valuation on our framework, with a Smart Value Score of 63/100. The valuation is defensible but offers no obvious bargain. Patience or a better entry price may reward disciplined buyers.
Frequently asked questions
Is WTM overvalued?
WTM scores 63/100 on our Smart Value Score (Grade C+), a mixed overall profile. A standard DCF is unreliable here given the profitability profile, so valuation leans on revenue-based measures like EV/Sales and the P/S percentile below.
What is WTM's fair value?
A standard DCF is unreliable for WTM given its current profitability profile. Revenue-based approaches like EV/Sales or the historical P/S percentile are more informative for this stock.
What P/E ratio does WTM trade at?
WTM trades at a P/E of 5.0x on trailing twelve-month earnings, against a 5-year median of 5.3x. P/E is what you pay per dollar of profit, and sitting below its own median means the stock is cheaper than usual relative to its earnings.
Is WTM a buy based on valuation?
Our Smart Value rating for WTM is Hold, from a Smart Value Score of 63/100 that blends growth, quality, and valuation. The profile is balanced and best suited to investors who already have a thesis. This is research to inform your decision, not personalized financial advice.
How does WTM's valuation compare to its history?
On P/E, WTM sits in the 22nd percentile of its own 5Y range, historically cheap relative to where it has traded. A low percentile means today's multiple is near the bottom of its historical band.
What is WTM's Smart Value Score?
WTM's Smart Value Score is 63/100. It is a proprietary WallStSmart metric blending growth quality, financial health, and valuation into a single 0-100 read, and scores above 75 are rare, signaling strong multi-factor alignment.