White Mountains Insurance Group, Ltd.

WTMNYSEFinancial Services● Active

$2,023.70

$-41.44(-2.01%)

Market Cap$5.0B

P/E Ratio—

52W High$2333

52W Low$1648

Avg Volume20K

Open$2,060.00

Beta0.29

Overview

White Mountains Insurance Group, Ltd. (WTM) Number of Employees – History & Annual Headcount

Annual SEC headcount, year-over-year change, and per-employee efficiency — chart and full history below.

SEC EDGAR · FMP · WTM · as of Feb 27, 2026

Latest filing snapshot

1,648

+755+84.55%vs prior year

White Mountains Insurance Group, Ltd. (WTM) employee data is sourced from the annual SEC 10-K filing. As of 2025, full-time employees only. Global consolidated headcount. View SEC filing ↗

SEC 10-K·Period end: 2025-12-31·Full-time · Global

Total Employees

1,648

Change (1Y)

+755

Growth % (1Y)

+84.55%

Revenue / Employee

$1.64M

Net Income / Employee

$671.4K

Market Cap

$5.0B

WTM Employee Count

1994 – 2025 · Annual · SEC filing

Source: SEC annual filings · Hover bar to view year data · Click to view original filing

Employees History

Filing Date	Period End	Employees	Change (1Y)	Growth (1Y)
2026-02-27	2025-12-31	1,648	+755	+84.55%
2025-02-28	2024-12-31	893	+111	+14.19%
2024-02-26	2023-12-31	782	-21	-2.62%
2023-02-27	2022-12-31	803	-845	-51.27%
2022-02-28	2021-12-31	1,648	+282	+20.64%
2021-02-26	2020-12-31	1,366	+104	+8.24%
2020-03-02	2019-12-31	1,262	+204	+19.28%
2019-02-27	2018-12-31	1,058	+782	+283.33%
2018-02-28	2017-12-31	276	-1,124	-80.29%
2017-02-27	2016-12-31	1,400	-1,573	-52.91%

▸ Source: SEC Annual Reports (Form 10-K / 20-F). Employee counts as of fiscal year end. Click the ↗ icon at the end of a row to open the original SEC filing in a new tab.

Related Companies — Employee Count

Insurance - Property & Casualty

#SymbolCompanyEmployeesMkt Cap

Chubb Limited

43,000$124.8B #2

CNA

CNA Financial Corporation

6,500$11.7B #3

HMN

Horace Mann Educators Corporation

1,750$1.9B #4

WTM

White Mountains Insurance Group, Ltd.YOU

Global Indemnity Group, LLC

266$378M

Source: /stock-peers + /profile.fullTimeEmployees · Click row → /employees · Sorted by headcount · WTM peer comparison

About WTM employees

WTM Employees · Headcount

White Mountains Insurance Group, Ltd. (WTM) employee data is sourced from the annual SEC 10-K filing. As of 2025, White Mountains Insurance Group, Ltd. had 1,648 full-time employees globally. Full-time employees only. Global consolidated headcount.

White Mountains Insurance Group, Ltd. employs 1,648 full-time employees as of the latest filing within the Insurance - Property & Casualty industry. Revenue per employee stands at $1.64M, reflecting the company's operational efficiency.

White Mountains Insurance Group, Ltd.'s workforce increased by 755 (84.55%) in 2025 compared to the prior fiscal year. The historical trend reflects the company's expansion and contraction cycles.

White Mountains Insurance Group, Ltd.'s revenue per employee of $1.64M positions it among the notable performers in the Insurance - Property & Casualty sector for operational efficiency.

Revenue Financial statements Net income SEC filings Price history Forecast & ratings Ownership Earnings

Frequently Asked Questions

WTM Employees · 5 questions

As of the latest SEC 10-K filing (2025), White Mountains Insurance Group, Ltd. had 1,648 full-time employees globally. This figure is sourced from the company's mandatory annual disclosure to the SEC.

White Mountains Insurance Group, Ltd. employee counthow many employees does White Mountains Insurance Group, Ltd. haveWTM total employees 2025

▸ Data source: FMP /historical-employee-count · SEC EDGAR annual filings · As reported · Global consolidated headcount · As of 2026-02-27