Form 3 Filing for Brian Kevin Turner

This filing is an initial report (Form 3) for Brian Kevin Turner, a director at FIRST INTERSTATE BANCSYSTEM INC. The report indicates that as of July 13, 2026, Mr. Turner did not beneficially own any shares of the company's Common Stock. The filing was executed on July 21, 2026, with Brian M. Murphy acting as attorney-in-fact. A footnote clarifies that the Reporting Person did not beneficially own any Common Stock at the time of filing the initial Form 3.