Homer A. Scott Jr - May 28, 2021 Form 4 Insider Report for FIRST INTERSTATE BANCSYSTEM INC (FIBK)

Role: 10%+ Owner
Signature: /s/ Kirk D. Jensen, Attorney-in-Fact for Reporting Person
Stock symbol: FIBK
Transactions as of: May 28, 2021
Transactions value $: $0
Form type: 4
Date filed: 6/1/2021, 06:45 PM
Next filing: Nov 29, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FIBK	Class A Common Stock	Conversion of derivative security	$0	+21.5K		$0.00	21.5K	May 28, 2021	By Trust
holding	FIBK	Class A Common Stock						26.2K	May 28, 2021	By IRA
holding	FIBK	Class A Common Stock						13.5K	May 28, 2021	By Spouse

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	FIBK	Class B Common Stock	Conversion of derivative security	$0	-21.5K	-1.08%	$0.00	1.96M	May 28, 2021	Class A Common Stock	21.5K	$0.00	By Trust	F1
holding	FIBK	Class B Common Stock						2.05K	May 28, 2021	Class A Common Stock	2.05K	$0.00	By Spouse	F1

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

Explanation of Responses:

Id	Content
F1	The Class B Common Stock is convertible at any time into Class A Common Stock on a share for share basis at the discretion of the holder. The conversion feature of the Class B Common Stock does not expire.