FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2026

Jan 6, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2025-12-08

Reporting Person: Scott Jeremy (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-08	Common Stock	G	550	—	Acquired	3496	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3512449	Indirect

Footnotes

F1: Composed of 3,416,108 shares held of record by NBar 5 Limited Partnership, 93,511 shares held of record by Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15, and
2,830 shares held of record by Jeremy Scott's spouse.

F2: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons.