FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2010

Aug 9, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2010-08-05

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-08-05	Class A Common Stock	P	1000	$13.43	Acquired	1000	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	16572	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$0.00	2029-12-31	Class A Common Stock (58288)	58288	Direct
Class B Common Stock	$0.00	2029-12-31	Class A Common Stock (8800)	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, a four-for-one stock split of 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 descretion of the holder. The conversion feature of the Class B common stock does not expire. All stock and stock option awards made prior to the recapitalization are exercisable for shares of Class B common stock.