First Interstate BancSystem

Founded in 1968 by Homer Scott, Sr. with the acquisition of a single bank in Sheridan, Wyoming, First Interstate BancSystem, Inc. has grown into a major regional financial services holding company. Headquartered in Billings, Montana, the company operates under a community banking philosophy, delivering a comprehensive range of products and services, including personal and business banking, wealth management, and mortgage services. A significant milestone in its history was the acquisition of Great Western Bancorp, Inc. in 2022, which substantially expanded its footprint across the Western and Midwestern U.S.