Kinsale Capital Group, Inc.

The Board of Directors of Kinsale Capital Group, Inc. (the “Company,” the “Board,” “we,” “us” or “our”) is soliciting your proxy to vote at the 2026 annual meeting of stockholders to be held at 10:30 a.m., Eastern Daylight Time, on May 21, 2026, and any adjournment or postponement of that meeting (the “Annual Meeting”).

The Annual Meeting will be held at The Commonwealth Club, 401 W. Franklin Street, Richmond, VA 23220. A Notice of Internet Availability of Proxy Materials (the “Proxy Notice”), containing instructions on how to access this Proxy Statement and our Annual Report to Stockholders online, was mailed to stockholders on or about April 9, 2026. On that date, we also began mailing a full set of proxy materials to those stockholders who had previously requested paper copies of our proxy materials.

If you received the Proxy Notice by mail, you will not automatically receive a printed copy of the proxy materials or our Annual Report to Stockholders. Instead, the Proxy Notice instructs you how you may access this information online and instructs you how you may submit your proxy. If you would like to receive a printed copy of our proxy materials, including our Annual Report to Stockholders, you should follow the instructions for requesting such materials included in the Proxy Notice.