FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2016

May 25, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2016-05-23

Reporting Person: Heyneman Charles M (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-23	Class B Common Stock	$0.00	G	1006	Disposed	2029-12-31	Class A Common Stock (1006)	Indirect
2016-05-23	Class B Common Stock	$0.00	G	424	Acquired	2029-12-31	Class A Common Stock (424)	Indirect
2016-05-23	Class B Common Stock	$0.00	G	582	Acquired	2029-12-31	Class A Common Stock (582)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	4949	Direct
Class A Common Stock	1044	Indirect
Class A Common Stock	3492	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$0.00	2029-12-31	Class A Common Stock (9000)	9000	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 descretion of the holder. The conversion feature of the Class B common stock does not expire.

F2: Change in form of indirect beneficial ownership from indirect ownership by self as trustee to indirect ownership by self as co-trustee for child's trust.

F3: Shares are owned by a trust for one of Mr. Heyneman's children, for which Mr. Heyneman is a co-trustee and is deemed to be the beneficial owner for purposes of Section 16.

F4: Shares are owned by a trust for one of Mr. Heyneman's children, for which Mr. Heyneman is a co-trustee and is deemed to be the beneficial owner for purposes of Section 16.