W. R. Berkley Corp (NYSE: WRB) is a property and casualty insurance holding company that underwrites commercial lines insurance and reinsurance across the United States and internationally. The company generates revenue primarily through net premiums earned on insurance policies and net investment income from its insurance float. W. R. Berkley operates as a decentralized group of insurance business units, each focused on specific specialty lines or geographic markets, competing against other commercial lines carriers in the property and casualty sector.

Revenue model

Net premiums earned from commercial property and casualty insurance policies, supplemented by net investment income generated from investing insurance float.

Products and services

Commercial lines property and casualty insurance and reinsurance, including specialty and admitted lines products written through decentralized business units.

Customers and end markets

Commercial insurance buyers across a range of industries and specialty markets in the United States and international markets.

Value-chain role

Insurance underwriter and risk carrier; holds policyholder premiums and invests float while retaining and transferring risk.

Geographic exposure

United States and international markets, as disclosed in the FY2025 10-K filed 2026-02-27.

Source: SEC 10-K, filed 2026-02-27

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