RLI Corp. has been operating as a prominent specialty property and casualty insurance enterprise for over six decades, having been officially founded in 1965 in Peoria, Illinois. Originally established under the name Replacement Lens, Inc. with an initial focus on insuring contact lenses, the enterprise evolved over the years through careful underwriting discipline and risk diversification into a national specialty carrier. Spanning more than 60 years of continuous operation, the company has expanded its market portfolio to underwrite complex property, casualty, and surety products through principal subsidiaries rated high in financial strength. Operating primarily through independent agents and brokers, it has maintained an enduring reputation for underwriting profitability, steady capital returns, and focused domestic market expertise.