FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2016

May 31, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2016-05-26

Reporting Person: GUENTHNER KEVIN (SVP & Chief Infor. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-05-26	Class A Common Stock	M	1449	$14.20	Acquired	17033	Direct
2016-05-26	Class A Common Stock	M	2977	$14.37	Acquired	20010	Direct
2016-05-26	Class A Common Stock	F	2916	$0.00	Disposed	17094	Direct
2016-05-26	Class A Common Stock	S	897	$28.85	Disposed	16197	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-26	Stock Options	$14.20	M	1449	Disposed	2021-02-14	Class A Common Stock (1449)	Direct
2016-05-26	Stock Options	$14.37	M	2977	Disposed	2022-02-17	Class A Common Stock (2977)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	8760	Indirect

Footnotes

F1: Includes 2,176 shares for payment of option exercise price and 740 shares for payment of taxes, valued at $29.11 per share.