Form 4 Filing for FIRST INTERSTATE BANCSYSTEM INC

On June 18, 2026, multiple reporting owners, including Scott Jonathan R and various trusts and entities associated with the Scott family, reported the disposition of 9,390 shares of Common Stock in FIRST INTERSTATE BANCSYSTEM INC (FIBK). The shares were sold at a weighted average price of $36.11, with individual transactions ranging from $36.00 to $36.33. These dispositions represent a decrease in the reporting owners' holdings, with post-transaction shares totaling 852,738. The reporting persons may be considered a group due to certain agreements, but individually disclaim beneficial ownership beyond their pecuniary interest. Footnote 1 provides details on the weighted average pricing and the reporting person's commitment to provide specific transaction data upon request. Footnote 2 details the composition of shares held by various trusts and individuals, and Footnote 3 clarifies the group status and beneficial ownership disclaimer.