FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2013

May 10, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2013-05-08

Reporting Person: MOORE TERRILL R (Exec. Vice President & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-08	Class A Common Stock	C	2100	$0.00	Acquired	57182	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-08	Stock Options	$12.37	M	8000	Disposed	2014-02-04	Class B Common Stock (8000)	Direct
2013-05-08	Class B Common Stock	$0.00	M	8000	Acquired	2029-12-31	Class A Common Stock (8000)	Direct
2013-05-08	Class B Common Stock	$0.00	F	5900	Disposed	2029-12-31	Class A Common Stock (5900)	Direct
2013-05-08	Class B Common Stock	$0.00	C	2100	Disposed	2029-12-31	Class A Common Stock (2100)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	14572	Indirect
Class A Common Stock	1500	Indirect
Class A Common Stock	8800	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.

F2: Includes 4,891 shares for payment of option exercise price and 1,009 shares for payment of taxes, valued at $20.23 per share.

F3: The number of derivative securities reported as beneficially owned in column 9 has been adjusted for the cancellation of 3,492 stock performance awards for which performance conditions were not met.