RLI Corp. underwrites selected property and casualty insurance through subsidiaries collectively (RLI Insurance Group). The Company conducts operations principally through four insurance companies: RLI Insurance Company, Contractors Bonding and Insurance Company (CBIC), Mt. Hawley Insurance Company (Mt. Hawley and. RLI Indemnity Company (RIC). RLI Insurance Company, its principal subsidiary, writes multiple lines insurance on an admitted basis in all 50 states, the District of Columbia and Puerto Rico. Contractors Bonding and Insurance Company (CBIC), a subsidiary of RLI Insurance Company, has authority to write multiple lines of insurance on an admitted basis in all 50 states and the District of Columbia. Mt. Hawley Insurance Company (Mt. Hawley), a subsidiary of RLI Insurance Company (RLI Ins.), writes surplus lines insurance in all 50 states, the District of Columbia, Puerto Rico, the Virgin Islands and Guam.