White Mountains Insurance Group Ltd. is a Bermuda-based diversified insurance and financial services holding company. Through its operating subsidiaries, the group underwrites a broad array of property and casualty insurance, mortgage and consumer insurance, and reinsurance products. Its business model combines underwriting operations with investment activities, allowing White Mountains to deploy capital across public and private markets and to support its insurance subsidiaries’ growth.
The company’s property and casualty segment writes specialty lines insurance, including professional liability, surety, marine, and credit insurance, serving both commercial and individual policyholders. White Mountains Re, its reinsurance arm, provides catastrophe and other treaty reinsurance solutions, while its mortgage and consumer insurance operations focus on mortgage portfolio guarantee and credit enhancement services. These activities are complemented by asset management strategies designed to generate long-term returns and to match liabilities arising from underwriting risks.
Founded in 1986, White Mountains has grown through a combination of strategic acquisitions and the development of new insurance platforms. Over more than three decades, the firm has expanded its geographic footprint to serve clients across North America and Europe and has periodically pursued reinsurance-linked securities investments to diversify its risk exposure. Its focus on specialty insurance niches and disciplined capital allocation has helped shape its reputation in the industry.
The company is led by an experienced management team with deep expertise in insurance underwriting, reinsurance and investment management. President and Chief Executive Officer George D. Manning, who has guided the firm since the early 2000s, works alongside a board of directors with extensive backgrounds in financial services and risk management. White Mountains remains focused on leveraging its underwriting capabilities and investment acumen to deliver sustainable long-term value.
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