White Mountains Acquires Majority Stake in Bamboo Ide8 Insurance Services

White Mountains Acquires Majority Interest in Ark Insurance Holdings

October 1, 2020

Insurance

White Mountains Insurance Group agreed to invest $605 million of equity (at a $300 million pre-money valuation) and purchase $41 million of shares from existing owners to acquire a majority interest in Ark Insurance Holdings, the parent of Ark Syndicate Management Ltd. The capital raise will give White Mountains ~72% ownership at closing (63% fully diluted), with a commitment to contribute up to an additional $200 million in 2021 to substantially expand Ark's Lloyd's capacity, convert its Bermuda reinsurance entity, and hire underwriting talent.

The Carlyle Group to Acquire NSM Insurance Group from White Mountains

May 9, 2022

Insurance

White Mountains Insurance Group has signed a definitive agreement to sell NSM Insurance Group to investment funds affiliated with The Carlyle Group for $1.775 billion. Carlyle will partner with NSM's founder-led management team to pursue operational improvements, accretive M&A and strategic investments in technology and data & analytics; the deal is expected to close in the second half of 2022, subject to regulatory approvals.

Ethos Capital-led Investor Group (with BCI, White Mountains and T. Rowe Price) Invests in BroadStreet Partners

April 10, 2025

Insurance

An investor group led by Ethos Capital, alongside British Columbia Investment Management Corporation (BCI), White Mountains Insurance Group and accounts advised by T. Rowe Price, has acquired an ownership position in BroadStreet Partners. Ontario Teachers' Pension Plan will retain a significant co-control stake; the investment will support BroadStreet's continued growth, M&A activity and technology/digital transformation.

Insignia Capital Group Invests in MediaAlpha in $350M Recapitalization

February 4, 2019

Marketing & Advertising

Insignia Capital Group has agreed to make a new investment in MediaAlpha through a recapitalization that values the company at approximately $350 million. White Mountains Insurance Group will remain a significant equity holder with a 42% fully-diluted stake; the deal is intended to accelerate MediaAlpha’s international expansion, technology investment, and entry into new vertical markets.

Inszone Insurance Services Acquires Desert Mountain Insurance Services, Inc.

January 26, 2022

Financial Services

Inszone Insurance Services, a California-based full-service insurance brokerage, has acquired Desert Mountain Insurance Services, Inc., a Scottsdale, Arizona agency that specializes in insurance for the healthcare community including medical malpractice. Desert Mountain will continue operating from its current location and serving clients under both the Desert Mountain and Inszone brands as Inszone further expands its national footprint and capabilities in healthcare-related insurance.

American Exchange Group Acquires White Mountain Footwear

January 17, 2023

Consumer Products

American Exchange Group has acquired White Mountain Footwear, a 40-year-old women’s footwear brand, to integrate its sourcing, manufacturing and management capabilities and expand distribution across the buyer’s existing retail channels. The acquisition will allow American Exchange Group to leverage synergies with its Aerosoles business, broaden product categories (including the Cliffs sister brand) and increase White Mountain’s reach into mass retailers and e-commerce.