First Interstate BancSystem Appoints Matthew Ritter and Kevin Turner as Class II Directors

First Interstate BancSystem, Inc. announced the appointment of two new Class II directors to its Board of Directors on July 13, 2026. Matthew Ritter, with over 25 years of finance, real estate, energy and private investment experience, and Kevin Turner, former COO of Microsoft and former Walmart executive, were appointed to fill vacancies created by the Board's decision to increase its size. Both directors will serve terms expiring at the 2029 annual meeting. The Board determined both appointees meet NASDAQ independence requirements. Ritter will serve on the Risk Committee and Technology, Innovation and Operations Committee, while Turner will serve on the Audit Committee and Technology, Innovation and Operations Committee. The appointments bring the Board to 13 total members. Ritter's investment business has an ordinary course loan relationship with First Interstate Bank, which was disclosed as not presenting any unusual risk features.