FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2018

May 3, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2018-05-01

Reporting Person: Corning Steven J (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-01	Stock Options (Right to Buy)	$20.87	M	2504	Disposed	2018-05-09	Class B Common Stock (2504.0)	Direct
2018-05-01	Class B Common Stock	$0.0	M	2504	Acquired		Class A Common Stock (2504.0)	Direct

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.