W. R. Berkley Corporation is an insurance holding company that operates through numerous subsidiaries, primarily underwriting commercial property and casualty insurance. Its operations are organized into two main segments: Insurance, which includes commercial lines, excess and surplus lines, workers' compensation, professional liability, and specialty coverages for small and midsize businesses; and Reinsurance, which provides casualty reinsurance and other risk-transfer products. The company focuses on niche markets where specialized underwriting expertise supports pricing and risk selection. Customers include businesses, professional organizations, and other insurers, served through a decentralized network of operating units and regional offices. W. R. Berkley operates mainly in the United States, with additional operations in the United Kingdom, continental Europe, and other international markets. Revenue comes primarily from premiums earned on insurance and reinsurance policies, supplemented by investment income generated from its investment portfolio.

WR Berkley Corp