Director Departure Notification

Thomas L. Brown, a director at James River Group Holdings, Inc., has informed the company that he will not seek re-election at the upcoming 2026 annual general meeting of shareholders. This decision was not prompted by any disagreements regarding the company's operations, policies, or practices. The company filed this Form 8-K report on September 3, 2026, to disclose this change. Jeanette Miller, Chief Legal Officer, signed the report on behalf of the company.