FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2025

Sep 6, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2025-08-05

Reporting Person: Scott Jeremy (Director, 10% Owner)
Reporting Person: Jeremy Scott TTEE, Jeremy Scott Revocable Trust Dtd 6/25/15 (10% Owner)
Reporting Person: NBAR5 Limited Partnership (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-03	Common Stock	G	22928	—	Acquired	3512233	Indirect
2025-08-05	Common Stock	L	216	—	Acquired	3512449	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2946	Direct

Footnotes

F1: Composed of 3,416,108 shares held of record by NBar5 Limited Partnership, 93,511 shares held of record following both transactions reported herein 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 agreements entered into among the reporting persons, the issuer, and other stockholders of the issuer signatory thereto, the reporting persons may be deemed members of a group with the other signatories to the agreement 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 his or its pecuniary interest therein. The reporting persons expect to file future Forms 4 or 5, if any, together with the indication of direct or indirect ownership in Tables I and II being made from Jeremy Scott's perspective, unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons.