White Mountains Insurance Group, Ltd.

Allied World Assurance Company Holdings, Ltd. is a Bermuda-based insurance holding company associated with the Allied World group, which provides specialty property, casualty, and reinsurance products. Its subsidiaries serve commercial businesses, institutions, and other insurers by underwriting complex and specialty risks.

W. R. Berkley Corporation functions as an insurance holding company, primarily underwriting commercial policies across the United States and globally. Its extensive operations are divided into two principal divisions: Insurance, and Reinsurance & Monoline Excess. The Insurance segment delivers a wide spectrum of commercial insurance solutions. This includes foundational coverages such as general liability, property, commercial auto, and professional liability, alongside specialized offerings like workers' compensation, environmental policies for diverse businesses, directors and officers (D&O) liability, cyber risk protection, and niche policies for fine arts and jewelry. The segment also extends to personal lines, providing home and automobile insurance, and specialized liability products for sectors such as law enforcement and public officials. Additionally, it offers accident and health insurance, group life, and crime and fidelity products, coupled with risk management and alternative risk program services. The Reinsurance & Monoline Excess segment focuses on assisting other insurance carriers and self-insured entities in effectively managing their overall risk exposure. This is accomplished through both treaty reinsurance, which handles portfolios of policies, and facultative reinsurance, designed for individual risks. Founded in 1967, W. R. Berkley Corporation is headquartered in Greenwich, Connecticut.

Hamilton Insurance Group Ltd. is a holding company, which provides insurance and reinsurance services. It operates through the International and Bermuda segments. The International segment comprises of property, specialty, and casualty insurance and reinsurance classes of business originating from the company's London, Dublin, and Hamilton Select operations. The Bermuda segment offers property, specialty, and casualty insurance and reinsurance classes of business originating from Hamilton Re, Bermuda and Hamilton Re US and subsidiaries. The company was founded in 2013 and is headquartered in Hamilton, Bermuda.

Alleghany CorporationInsurance & ReinsuranceUnited States

67% match

Alleghany Corporation, a subsidiary of Berkshire Hathaway, owns and supports property and casualty reinsurance and insurance operating subsidiaries.

Mosaic InsuranceInsurance

67% match

Mosaic Insurance Holdings Limited is a global specialty insurer headquartered in Hamilton, Bermuda, with major underwriting operations and offices in London, New York, and Chicago.

Coralisle Group Ltd.Insurance

67% match

Coralisle Group Ltd. is a major insurance and financial services provider offering comprehensive coverage across the Caribbean region. The group is headquartered in Hamilton, Bermuda.