FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2011

Feb 18, 2011

SEC Form 4/A — Form 4/A

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2011-02-16

Reporting Person: GARDING ED (Exec. Vice Pres. & COO)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-16	Stock Options	$10.50	M	13200	Disposed	2011-03-16	Class B Common Stock (13200)	Direct
2011-02-16	Class B Common Stock	$0.00	M	13200	Acquired	2029-12-31	Class A Common Stock (13200)	Direct
2011-02-16	Class B Common Stock	$0.00	F	10784	Disposed	2029-12-31	Class A Common Stock (10784)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	1250	Direct
Class A Common Stock	19056	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 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.

F2: Includes 9,435 shares for payment of option exercise price and 1,349 shares for payment of taxes, valued at the price of $14.69 per share.