What is WTM's market cap?

$5.67B, based on the Nov 4 close of $2,376.30.

What is WTM's P/E ratio?

5.2× trailing-twelve-month earnings of $1.10B.

Does White Mountains Insurance Group pay a dividend?

Yes. The latest regular dividend was $1 per share (ex-date Mar 16), an annualised yield of 0.04%.

How much of WTM is sold short?

146.9K shares, 6.3% of float, as of Oct 15, 2026.

What sector is WTM in?

Financials, in the Insurance industry.

NYSE · WTMFinancialsInsurance

White Mountains Insurance Group Ltd. (WTM)

$2,376.30+3.93%

Close Nov 4, 2026 · split-adjusted

Nov 3, 2026$2286.53▲ 20.35% in range

Nov 3, 2025Low $1881.61 · High $2319.41Nov 3, 2026

What changed · written from our data

As of Nov 4, 2026

White Mountains Insurance Group closed at $2,376.30 on Nov 4, up 3.93% — matching its 52-week closing high. Volume of 24.5K shares was 1.06× its 20-day average (close to normal).

Split-adjusted performance: +16.6% over one month, +14.2% over six months, +25.1% over one year.

In the quarter ended Jun 30, 2026, revenue was $844.60M, up 22.5% from a year earlier, with a net margin of 23.0%.

Short interest was 146.9K shares at the Oct 15 settlement, up 5.2% from the prior report (6.3% of float, 7.3 days to cover).

Market cap$5.67B2.4M shares

Revenue · quarter$844.6M+22.5% YoY

Diluted EPS$80.58+68.8% YoY

P/E · TTM5.2×P/S 1.5×

Net margin23.0%Gross 66.7%

Dividend yield0.04%$1 last paid

52-week range1881.61 – 2376.300.0% from high

Volume24.5K1.06× 20-day avg

Volatility · 60d16.4%Annualised

Short % of float6.3%7.3 days to cover

Net cash-$805.0MCash $127.5M

Next earnings—Not scheduled

Split-adjusted performance

1W +7.6%1M +16.6%3M +11.0%6M +14.2%YTD +14.4%1Y +25.1%3Y +64.2%5Y +122.8%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Insurance

Percentile among 129 companies (100 = best)

6-month momentum43

Revenue growth77

Net margin82

Value (low P/E)91

Size56

Industry medians: 6-month return +15.9%, revenue growth +6.7%, net margin 10.3%, P/E 12.6×.

Short interest

Details →

Shares short146.9K+5.2% vs prior

Days to cover7.3Settled Oct 15

% of float6.3%

Short vol. 10d71.0%of daily volume

Closest peers by size in Insurance

Company	Price	Today	6M	Rev. growth	Net margin	P/E	Mkt cap
WTMWhite Mountains Insurance Group	$2,376.30	+3.93%	+14.2%	+22.5%	23.0%	5.2	$5.67B
RYANRyan Specialty Holdings	$47.54	+3.96%	+61.8%	+4.8%	4.7%	54.4	$5.69B	Compare
MTGMGIC Investment	$29.13	+1.71%	+10.3%	−2.9%	61.7%	8.4	$5.98B	Compare
CNOCNO Financial Group	$57.73	+0.59%	+26.3%	+11.6%	9.8%	18.9	$5.29B	Compare
SIGISelective Insurance Group	$103.20	+2.62%	+24.3%	−2.5%	9.5%	12.3	$6.15B	Compare
ESNTEssent Group	$69.34	+2.41%	+12.9%	+11.2%	68.5%	9.2	$6.23B	Compare
RLIRLI	$68.91	+3.10%	+40.6%	−6.3%	17.0%	16.0	$6.32B	Compare
MCYMercury General	$88.93	−13.42%	−7.4%	+13.8%	15.7%	5.3	$4.93B	Compare
ACTEnact Holdings	$48.24	+1.56%	+12.0%	+4.1%	55.1%	9.7	$6.63B	Compare

News about White Mountains Insurance Group

All news →

Bishop Street Underwriters Announces Strategic Investment by White MountainsGlobeNewswire Inc. · Feb 26, 2026▲ Positive

Quick answers

What does White Mountains Insurance Group do?: White Mountains Insurance Group Ltd is engaged in the business of making opportunistic and value-oriented acquisitions of businesses and assets in the insurance, financial services, and related sectors, operating these businesses and assets through its subsidiaries and, if and when attractive exit valuations become available, disposing of these businesses and assets. The company conducts its business in five areas: property and casualty insurance and reinsurance, municipal bond reinsurance, capital solutions for asset and wealth management firms, property and casualty insurance distribution, and other operations.
What is WTM's market cap?: $5.67B, based on the Nov 4 close of $2,376.30.
What is WTM's P/E ratio?: 5.2× trailing-twelve-month earnings of $1.10B.
Does White Mountains Insurance Group pay a dividend?: Yes. The latest regular dividend was $1 per share (ex-date Mar 16), an annualised yield of 0.04%.
How much of WTM is sold short?: 146.9K shares, 6.3% of float, as of Oct 15, 2026.
What sector is WTM in?: Financials, in the Insurance industry.

About White Mountains Insurance Group

White Mountains Insurance Group Ltd is engaged in the business of making opportunistic and value-oriented acquisitions of businesses and assets in the insurance, financial services, and related sectors, operating these businesses and assets through its subsidiaries and, if and when attractive exit valuations become available, disposing of these businesses and assets. The company conducts its business in five areas: property and casualty insurance and reinsurance, municipal bond reinsurance, capital solutions for asset and wealth management firms, property and casualty insurance distribution, and other operations. The company has four reportable segments: Ark/WM Outrigger, HG Global, Kudu and Distinguished.

HQ: Hanover, NH1,648 employeesListed Oct 23, 1985whitemountains.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology