RLI Corp., an insurance holding company, provides property, casualty, and surety insurance products. Its Casualty segment provides commercial excess, personal umbrella, general liability, transportation, and management liability coverages; professional liability and workers’ compensation for office-based professional coverages; commercial automobile liability and physical damage insurance to local, intermediate and long haul truckers, public transportation entities, and other specialty commercial automobile risks; incidental related insurance coverages; inland marine coverages; directors and officers liability insurance, fiduciary liability and coverages, employment practice liability, public and private businesses risk, and home business insurance products.