FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2018

May 25, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2018-05-23

Reporting Person: SCOTT RANDALL I (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-23	Class A Common Stock	M	1190	—	Acquired	1190	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-23	Class B Common Stock	$0.0	M	1190	Disposed		Class A Common Stock (1190.0)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	9648	Indirect
Class A Common Stock	13216	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$0.0		Class A Common Stock (156279.0)	156279	Indirect
Class B Common Stock	$0.0		Class A Common Stock (3795676.0)	3795676	Indirect
Class B Common Stock	$0.0		Class A Common Stock (85836.0)	85836	Indirect
Class B Common Stock	$0.0		Class A Common Stock (803310.0)	803310	Indirect

Footnotes

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.