MICHAEL L. SCUDDER - 27 Aug 2025 Form 4 Insider Report for FIRST INTERSTATE BANCSYSTEM INC (FIBK)

Role: Director
Signature: /s/ Kirk D. Jensen, as attorney in fact for reporting person
Issuer symbol: FIBK
Transactions as of: 27 Aug 2025
Net transactions value: +$59,996
Form type: 4
Filing time: 29 Aug 2025, 13:05:06 UTC
Previous filing: 21 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SCUDDER MICHAEL L	Director	401 N. 31ST ST, P.O. BOX 30918, BILLINGS	/s/ Kirk D. Jensen, as attorney in fact for reporting person	29 Aug 2025	0001199246

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FIBK	Common Stock	Award	$59,996	+1,879		$31.93	1,879	27 Aug 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2026, subject to the reporting persons provision of continuous service to the Registrant through the vesting date.