Homer A. Scott Jr. - 28 May 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
Issuer symbol: FIBK
Transactions as of: 28 May 2021
Net transactions value: $0
Form type: 4
Filing time: 01 Jun 2021, 18:45:07 UTC
Next filing: 29 Nov 2021
SEC: View on sec.gov

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	+21,500		$0.000000	21,500	28 May 2021	By Trust
holding	FIBK	Class A Common Stock						26,193	28 May 2021	By IRA
holding	FIBK	Class A Common Stock						13,487	28 May 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	-21,500	-1.1%	$0.000000	1,961,232	28 May 2021	Class A Common Stock	21,500	$0.000000	By Trust	F1
holding	FIBK	Class B Common Stock						2,047	28 May 2021	Class A Common Stock	2,047	$0.000000	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.