What is the 13F Pro Quality Score for WTM?

13F Pro ranks WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View WTM's current score at https://13fpro.ai/research/WTM (free sign-up required for the full ranking).

Where does 13F Pro source WTM data?

All WHITE MOUNTAINS INSURANCE GROUP LTD fundamentals and ownership data come directly from SEC EDGAR. WHITE MOUNTAINS INSURANCE GROUP LTD files with the SEC under CIK 776867. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is WTM in?

WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) is classified in the Financials sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/financials.

How often is WTM research updated on 13F Pro?

WTM's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

WHITE MOUNTAINS INSURANCE GROUP LTD(WTM)Stock Analysis

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13F Pro Quality Score

Not in ranked universe

Pending next ranking run

This company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. Rankings refresh on Jan 1, Apr 1, Jul 1, Oct 1.

Financial data, filings, and institutional holdings below are still tracked in full — only the proprietary quality composite is unavailable for this name.

WTM Stock Analysis & AI Quality Score

AI stock analysis and institutional research for WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), a Financials sector company. WTM is not currently included in 13F Pro's AI-ranked quality universe — this company passes all size and coverage filters but hasn't been included in the latest quarterly ranking run. rankings refresh on jan 1, apr 1, jul 1, oct 1. Based on the latest XBRL financial filings (Q1 2026), WHITE MOUNTAINS INSURANCE GROUP LTD reports quarterly revenue of $517.8M, net income of $-27.2M, free cash flow of $30.5M. Top institutional holders of WTM by reported 13-F value include DIMENSIONAL FUND ADVISORS, Neuberger Berman Group, River Road Asset Management,, based on the most recent SEC filings. WTM trades on the NYSE exchange and files with the SEC under CIK 776867. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate WTM daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for WHITE MOUNTAINS INSURANCE GROUP LTD directly from SEC EDGAR.

Revenue

Q1 2026

$517.8M

Net Income

Q1 2026

$-27.2M

Free Cash Flow

Q1 2026

$30.5M

D/E Ratio

Q1 2026

0.16

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Revenue

+66.8% YoY

$3.73BFY 2025

FY22 $1.16BFY23 $2.17BFY24 $2.24BFY25 $3.73B

Net Income

+380.2% YoY

$1.11BFY 2025

FY22 $792.8MFY23 $509.2MFY24 $230.4MFY25 $1.11B

EPS (Diluted)

+379.1% YoY

$430.14FY 2025

FY22 $276.96FY23 $198.60FY24 $89.79FY25 $430.14

Total Assets

+24.0% YoY

$12.31BFY 2025

FY22 $7.39BFY23 $8.39BFY24 $9.93BFY25 $12.31B

Total Debt

+48.8% YoY

$837.0MFY 2025

FY22 $575.2MFY23 $564.6MFY24 $562.5MFY25 $837.0M

Op. Cash Flow

-6.2% YoY

$550.5MFY 2025

FY22 $365.0MFY23 $404.1MFY24 $586.8MFY25 $550.5M

Metric	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2018
Revenue	$3.73B +66.8%	$2.24B +3.4%	$2.17B +87.1%	$1.16B +88.5%	$614.4M +66.5%	$369.1M
Net Income	$1.11B +380.2%	$230.4M -54.8%	$509.2M -35.8%	$792.8M +387.9%	$-275.4M	—
EPS (Diluted)	$430.14 +379.1%	$89.79 -54.8%	$198.60 -28.3%	$276.96 +409.6%	$-89.46 -114.2%	$-41.76
Total Assets	$12.31B +24.0%	$9.93B +18.4%	$8.39B +13.5%	$7.39B +5.6%	$7.00B +108.2%	$3.36B
Total Debt	$837.0M +48.8%	$562.5M -0.4%	$564.6M -1.8%	$575.2M +36.7%	$420.9M +118.4%	$192.7M
Operating Cash Flow	$550.5M -6.2%	$586.8M +45.2%	$404.1M +10.7%	$365.0M +845.6%	$38.6M +224.1%	$-31.1M

AI Insight: WTM Financial Trends

Q4 2025 revenue surge to $1,604M and $836M net income dominates the record, but Q1 2026 swings back to a $27M loss, signaling one-time event distortion.

• Revenue jumped from $358M in Q4 2024 to $1,604M in Q4 2025, a 348% year-over-year spike, likely driven by a non-recurring transaction.

• Equity grew from $4,423M in Q2 2024 to $5,374M in Q1 2026, a steady $951M build over six quarters.

• Total debt rose sharply from $530M in Q2 2024 to $870M in Q3 2025 before easing to $835M in Q1 2026, increasing leverage materially.

• Operating cash flow is highly volatile, ranging from -$40M in Q1 2025 to $359M in Q3 2025, with no stable trend.

⚠ Q1 2026 net loss of $27M immediately follows the $836M Q4 2025 windfall — sustainability of earnings post-transaction is unproven.

⚠ Debt climbed 58% from $530M to $835M over the observed period; monitor whether deleveraging follows the Q4 2025 proceeds.

⚠ Operating cash flow dropped to $30M in Q1 2026 despite elevated equity — watch for FCF normalization in coming quarters.

AI Insight: WTM Ratio Trends

WTM's profitability is highly episodic: Q4 2025's blowout 56.2% operating margin and 61.6% ROE collapse to deeply negative in Q1 2026, making TTM figures misleading as a run-rate guide.

• Operating margin swings wildly quarter to quarter, ranging from -33.7% in Q4 2024 to +56.2% in Q4 2025, signaling heavy exposure to lumpy, event-driven gains.

• TTM operating margin of 33.5% and ROIC of 19.8% are flattered by the outsized Q4 2025 quarter and do not reflect Q1 2026's -4.9% / -1.6% reality.

• Leverage remains modest and stable; D/E has barely moved, ranging from 0.12 to 0.18 across all reported periods.

⚠ Q1 2026 ROIC turned negative at -1.6% after Q4 2025's peak of 57.6% — confirm whether Q4 2025 reflected a one-time asset sale or recurring earnings power.

⚠ D/E ticked up to 0.16–0.18 in the most recent four quarters after holding at 0.12; monitor for continued creep alongside volatile earnings.

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Available Research

13F Pro tracks comprehensive data for WHITE MOUNTAINS INSURANCE GROUP LTD including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of WTM

DIMENSIONAL FUND ADVISORS LP
$344.1M156,618 sh
Neuberger Berman Group LLC
$274.0M124,715 sh
River Road Asset Management, LLC
$264.8M120,519 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$253.9M115,553 sh
BlackRock, Inc.
$249.0M113,328 sh
VANGUARD CAPITAL MANAGEMENT LLC
$239.8M109,157 sh
COOKE & BIELER LP
$230.4M104,857 sh
FULLER & THALER ASSET MANAGEMENT, INC.
$229.7M104,561 sh
FIDUCIARY MANAGEMENT INC /WI/
$186.9M85,066 sh
Wallace Capital Management Inc.
$173.1M78,795 sh

Fund	Value	Shares
DIMENSIONAL FUND ADVISORS LP	$344.1M	156,618
Neuberger Berman Group LLC	$274.0M	124,715
River Road Asset Management, LLC	$264.8M	120,519
VANGUARD PORTFOLIO MANAGEMENT LLC	$253.9M	115,553
BlackRock, Inc.	$249.0M	113,328
VANGUARD CAPITAL MANAGEMENT LLC	$239.8M	109,157
COOKE & BIELER LP	$230.4M	104,857
FULLER & THALER ASSET MANAGEMENT, INC.	$229.7M	104,561
FIDUCIARY MANAGEMENT INC /WI/	$186.9M	85,066
Wallace Capital Management Inc.	$173.1M	78,795

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Is WTM a good stock to buy?

13F Pro's AI-powered analysis of WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Financials sector (listed on NYSE). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for WTM are available on the WTM stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing.

Which hedge funds own WTM?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling WTM. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of WHITE MOUNTAINS INSURANCE GROUP LTD's investment landscape.