HERITAGE APPROACH TEAM COMPANIES ESG CONTACT FOR SHAREHOLDERS Companies Over many decades, White Mountains has owned and operated a broad range of companies, including property & casualty insurers, life insurers, brokerages, financial guarantors, reinsurers, service companies and investment advisors. We have also invested in adjacent or related businesses, including consumer, media and technology companies that have an insurance or financial services-related component. Daily, we examine the full set of current opportunities but always with an eye toward what might lay around the bend. Select current companies Other current holdings and strategic investments Select historical companies The companies presented are intended to be illustrative of the types of investments that have been made by White Mountains and do not include all investments made. White Mountains Insurance Group, Ltd. 26 Reid Street, Suite 601 Hamilton HM 11, Bermuda 441-278-3160 23 South Main Street, Suite 3B Hanover, New Hampshire 03755 603-640-2200 265 Franklin Street, Suite 901 Boston, Massachusetts 02110 617-725-7122 200 Hubbard Road Guilford, Connecticut 06437 203-458-5823 info@whitemountains.com Community Engagement Privacy Policy Safe Harbor Statement ©2021 White Mountains Insurance Group, Ltd.

HERITAGE APPROACH TEAM COMPANIES ESG CONTACT FOR SHAREHOLDERS ESG Our Commitment to ESG White Mountains invests for the long-term in the businesses we own. We think like owners, not short-term financial engineers. Our overriding goal is superior growth in White Mountains’ intrinsic value per share over long periods of time. To achieve this goal and to steward our owners’ capital appropriately, we are committed to sustainability and corporate responsibility. We have made that commitment an integral part of our culture and practices. White Mountains Insurance Group, Ltd. 26 Reid Street, Suite 601 Hamilton HM 11, Bermuda 441-278-3160 23 South Main Street, Suite 3B Hanover, New Hampshire 03755 603-640-2200 265 Franklin Street, Suite 901 Boston, Massachusetts 02110 617-725-7122 200 Hubbard Road Guilford, Connecticut 06437 203-458-5823 info@whitemountains.com Community Engagement Privacy Policy Safe Harbor Statement ©2021 White Mountains Insurance Group, Ltd.