Ticker: FIBK

Company: FIRST INTERSTATE BANCSYSTEM OF MONTANA INC

Person: Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees, owns ten percent - or more - of the company

Transaction date: Dec. 1, 2025

Reporting date: Dec. 1, 2025

Average share price: 32.75

Sold 10000.0 shares for 327500.0