White Mountains Insurance Group, Ltd. (WTM) Open Interest History

Open interest tracks the total number of outstanding options contracts. Rising OI alongside price moves can indicate growing commitment to the trend; declining OI suggests positions are being closed.

White Mountains Insurance Group, Ltd. (WTM) operates in the Financial Services sector, specifically the Insurance - Property & Casualty industry, with a market capitalization near $5.32B, listed on NYSE, employing roughly 893 people, carrying a beta of 0.32 to the broader market. White Mountains Insurance Group, Ltd. Led by Liam Caffrey, public since 1985-10-23.

Open interest history tracks how outstanding options contracts change over time. No recent options activity for WTM as of 2026-06-02; this typically reflects low options liquidity, a recently listed name, or a temporary data feed delay. Snapshot will refresh on the next active session.

Learn how open interest is reported and how to read the data →