RLI Corp., a US-based specialty insurer focused on property, casualty, and surety markets, has reported solid top-line growth as total gross premiums written increased by 3% to $503 million for the first quarter of 2026, led by the casualty segment, compared to $491 million in Q1’25.For the quarter, net premiums written (NPW) were $417.6 million compared to $397 million in Q1’26, while net premiums earned were $411.3 million compared to $398.3 million in Q1’25.The insurer’s underwriting income dipped to $57 ...