FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2013

May 8, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2013-05-07

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-07	Class A Common Stock	S	2000	$20.0635	Disposed	55082	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: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $20.05 to $20.08. 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, full information regarding number of shares purchased at each separate price within the range set forth in this Form 4.