FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2013

Nov 20, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2013-11-20

Reporting Person: Huston Michael G. (Ex. VP & Chief Banking Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-11-20	Class A Common Stock	M	1800	$17.00	Acquired	9486	Direct
2013-11-20	Class A Common Stock	S	1800	$25.8585	Disposed	7686	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-11-20	Stock Options	$17.00	M	1800	Disposed	2016-01-26	Class B Common Stock (1800)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	4972	Indirect
Class A Common Stock	15411	Indirect

Footnotes

F1: Includes 713 shares of Class A common stock previously held directly, which was transferred into a trust account and is now held indirectly by Trust.

F2: The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.80 to $26.13. The reporting person undertakes to provide to First Interstate BancSystem, Inc., any security holder of First Interstate BancSystem, Inc., or the staff of the Securities and Exchange Commission, upon, request, the full information regarding the number of shares sold at each separate price within the ranges set forth above.

F3: Simultaneous with exercise of stock options, an election was made to immediately convert Class B commons shares received to Class A common shares.