Form 4 Filing for Jensen Kirk D

This filing details a transaction by Jensen Kirk D, General Counsel at FIRST INTERSTATE BANCSYSTEM INC (FIBK). On March 15, 2026, Mr. Kirk acquired 3,951 shares of common stock at a price of $33.13 per share, bringing his total holdings to 34,106 shares. These shares were acquired upon the vesting of restricted stock units granted under the company's 2023 Equity and Incentive Plan. The units vest in three equal annual installments starting March 15, 2027, contingent upon continued employment.