What are the largest reinsurance companies in the US?

Written by Editorial Team | Last Updated: August 2026

The United States reinsurance sector comprises specialized domestic carriers and major international groups that provide critical risk-transfer capacity to primary insurance companies. Major participants operating extensively within the U.S. market include Berkshire Hathaway's reinsurance division, Gen Re, and Reinsurance Group of America, which stands as a preeminent global life and health reinsurer. Additionally, global reinsurance titans such as Swiss Re and Munich Re maintain massive U.S. operations. These institutions absorb peak catastrophe exposures, stabilize primary insurer balance sheets, and enable underwriting growth across property, casualty, and specialty lines.

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Gen Re, a major player in the property/casualty and life/health reinsurance industry, reports annual revenue that positions it as a significant financial institution in the sector.

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