4processed

Form 4 — Insider Transaction

FIRST INTERSTATE BANCSYSTEM INC(FIBK)

Filing Date

June 1, 2026

Accepted

June 1, 2026

Accession No.

0002090710-26-000004

CIK

0000860413

Insider Transactions

InsiderTitleTypeSharesPriceValueOwned AfterSecurityDate
Shepler Christopher L.Chief Banking OfficerOther3.4K$013.2KCommon StockJun 1, 2026