RLI Corp. is a specialty insurance holding company that provides a diverse portfolio of property, casualty, and surety insurance products primarily in the United States. The company's business model is centered on underwriting unique and hard-to-place risks, competing on availability, coverage, and service rather than price. RLI operates through three main segments: Casualty, Property, and Surety. The Casualty segment, which accounts for approximately 60% of net premiums, offers commercial excess, personal umbrella, general liability, transportation, and professional liability coverages. The Property segment, representing about 31% of net premiums, provides commercial property, marine, earthquake, and difference in conditions (DIC) insurance, as well as specialized homeowners coverage in Hawaii. The Surety segment, contributing the remaining 9% of net premiums, writes commercial, contract, and transactional surety bonds. RLI distributes its products through a network of wholesale and retail brokers, independent agents, and direct digital platforms. The company maintains a strong competitive position in the specialty insurance market through its disciplined risk selection, deep expertise in niche markets, and consistent underwriting profitability, having achieved decades of consecutive underwriting profit.