James River reports Q1 2026 loss due to reinsurance costs, but sees growth in casualty lines and strong investment income

James River Group Holdings reported a net loss of $10.9 million in Q1 2026, impacted by $6.7 million in reinsurance reinstatement premiums tied to a single claim. Despite this, the company saw modest growth in its Excess and Surplus casualty lines and reduced administrative expenses by 10.5%. Investment income rose 6.6% to $21.3 million, reflecting a diversified portfolio. Management remains optimistic about market opportunities in 2026, focusing on underwriting discipline and expense efficiency.