FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2013

May 24, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2013-05-22

Reporting Person: SULLIVAN MICHAEL J/CO (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-22	Class A Common Stock	A	1044	$20.82	Acquired	1968	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-23	Stock Options	$11.50	M	2692	Disposed	2013-06-02	Class B Common Stock (2692)	Direct
2013-05-23	Class B Common Stock	$0.00	M	2692	Acquired	2029-12-31	Class A Common Stock (2692)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$0.00	2029-12-31	Class A Common Stock (3140)	3140	Indirect
Class B Common Stock	$0.00	2029-12-31	Class A Common Stock (16432)	16432	Indirect

Footnotes

F1: On March 5, 2010, the Company recapitalized its existing common stock. The recapitalization included, among other things, a redesignation of existing common stock as Class B common stock and the creation of a new class of common stock designated as Class A common stock, which is listed on the NASDAQ stock market under the symbol "FIBK". 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.