WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) Headquarters — Hanover, New Hampshire

Headquarters

23 South Main Street
Suite 3B
Hanover, NH 03755

Pending review

Incorporated in Bermuda, WHITE MOUNTAINS INSURANCE GROUP LTD operates from its headquarters in Hanover, New Hampshire. A company's state of incorporation is a legal domicile and is often not where it actually does business.

All 10 public companies headquartered in New Hampshire

Exchange

NYSE

Sector

Banking & Finance

Industry

Fire, Marine & Casualty Insurance

Shares outstanding

2.39M (as of Aug 3, 2026)

Sector groupings are Tickerscape's own, derived from the company's SEC Standard Industrial Classification code — not GICS®, ICB® or any other licensed scheme, and they will disagree with those on some companies. How sectors are assigned.

View on the interactive map · Methodology

Informational purposes only — not investment advice. Headquarters location reflects the company's most recently recorded principal address.