RLI Corp. is an insurance holding company that provides property, casualty, and surety insurance products. Its Casualty segment offers commercial excess, personal umbrella, general liability, transportation, management liability, professional liability, and workers' compensation coverages, along with inland marine and environmental liability products. The Property segment provides commercial property, marine, homeowners', and dwelling fire insurance, while the Surety segment offers commercial surety bonds and bonds for contractors. The company also provides reinsurance coverages and markets its products through branch offices, brokers, carrier partners, and agents. RLI Corp. was incorporated in 1965 and is headquartered in Peoria, Illinois.