RLI Corp. is an insurance holding company that underwrites a comprehensive portfolio of property and casualty (P&C) insurance products, operating across the United States and internationally. Its business is primarily structured into three segments: The Casualty segment offers a diverse range of commercial and personal coverage. This includes general liability policies for commercial clients like manufacturers, contractors, apartments, and retail businesses, protecting them from third-party claims. It also provides specialized liability coverages for security guards, onshore energy-related operations, and environmental risks, such as underground storage tanks, asbestos removal, and remediation specialists. Professional liability (Errors & Omissions) insurance is tailored for small to medium-sized design, technical, computer, and various other professional firms. Furthermore, this segment provides commercial automobile liability and physical damage insurance for truckers (local, intermediate, and long-haul), public transportation entities, and other niche commercial auto risks. Additional offerings within Casualty encompass incidental and related insurance products, inland marine coverages, management liability (including Directors & Officers, fiduciary, and employment practice liability for public and private businesses), healthcare liability, and home business insurance. The Property segment provides a variety of property insurance solutions. This includes commercial property coverage, various marine insurance products (cargo, hull, protection and indemnity, marine liability, inland marine), homeowners' policies, dwelling fire insurance, and other property-related coverages. The Surety segment issues a range of surety bonds. These include commercial surety bonds designed for medium to large businesses, smaller bonds for individuals and businesses, and bonds specifically for small to medium-sized contractors. Beyond these direct insurance offerings, RLI Corp. also engages in underwriting various reinsurance coverages. The company distributes its products through a multi-channel network, which includes its own branch offices, brokers, carrier partners, and both underwriting and independent agents. RLI Corp. was established in 1965 and is headquartered in Peoria, Illinois.