RLI Corp. revenue for the last year amounted to 1.81 B USD, the most of which — 758.35 M USD — came from its highest performing source at the moment, Casualty, the year earlier bringing 711.83 M USD. The greatest contribution to the revenue figure was made by United States — last year it brought RLI Corp. 1.29 B USD, and the year before that — 1.14 B USD.