RLI Corp., through its subsidiaries, underwrites property and casualty insurance primarily in the United States. Its Casualty segment provides commercial and personal umbrella coverage products; and general liability products consisting of coverage for third party liability of commercial insureds, including manufacturers, contractors, apartments, real estate investment trusts, and mercantile. This segment also offers coverages in the area of environmental liability for underground storage tanks, contractors and asbestos, and environmental remediation specialists; commercial automobile liability and physical damage insurance products; other types of commercial automobile risks; and incidental insurance coverages, including general liability, excess liability, and motor truck cargo. In addition, it provides various professional liability coverages, such as general liability, property, automobile, excess liability, and worker’s compensation; property and casualty insurance coverages to small contractors and other small-to-medium sized retail businesses; management liability coverages, such as directors and officers, liability insurance, fiduciary liability, and fidelity coverages; medical professional liability insurance; and various other products, including home business insurance, which provides limited liability and property coverage for various small business owners. The company’s Property segment comprises primarily of commercial fire; earthquake; difference in conditions; marine; facultative and treaty reinsurance, including crop; and personal lines policies, such as recreational vehicle and Hawaii homeowners coverages. Its Surety segment specializes in writing small-to-large commercial and contract surety coverages, as well as surety coverages for the energy, petrochemical, and refining industries; and offers miscellaneous bonds, including license and permit, notary, and court bonds. RLI Corp. was founded in 1965 and is headquartered in Peoria, Illinois.