FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2022

Feb 4, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2022-02-01

Reporting Person: Grieb Frances Pallas (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-02-01	Class A Common Stock	A	16592	—	Acquired	16592	Direct
2022-02-01	Class A Common Stock	A	4212	—	Acquired	4212	Indirect
2022-02-01	Class A Common Stock	A	867	$38.41	Acquired	17459	Direct

Footnotes

F1: Received in exchange for 19,694 shares of Great Western Bancorp, Inc. ("GWB") common stock in connection with the merger of GWB into the issuer (the "Merger"). On the effective date of the Merger, the reporting person was entitled to receive approximately 0.8425 shares of issuer Class A common stock for each share of GWB common stock then owned or deferred.

F2: Pursuant to the reporting person's election to participate in a deferred compensation arrangement with GWB that was respected by the issuer in connection with the Merger, the delivery of 4,728 of these shares has been deferred over a period of four years, with one-fourth of such shares to be delivered on each of the next four annual anniversaries of the closing date of the Merger.

F3: Received in exchange for 5,000 shares of GWB common stock in connection with the Merger. On the effective date of the Merger, the reporting person was entitled to receive approximately 0.8425 shares of issuer Class A common stock for each share of GWB common stock then owned.