FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2011

Feb 18, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2011-02-17

Reporting Person: Castle Julie G (President, Financial Services)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-17	Class A Common Stock	A	5913	$0.00	Acquired	10286	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-17	Stock Options	$14.20	A	8391	Acquired	2021-02-14	Class A Common Stock (8391)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	2617	Indirect

Footnotes

F1: Shares issued for no consideration pursuant to the Registrant's 2006 Equity Compensation Plan. Includes 2,535 time-based shares that vest in three equal portions on the first, second and third anniversaries of February 14, 2011; and, also includes and 3,378 performance-based shares vest on December 31, 2013.

F2: Stock options issued pursuant to the Registrant's 2006 Equity Compensation Plan. Stock options vest in three equal portions on the first, second and third anniversaries of February 14, 2011.