BILLINGS, Mont.--(BUSINESS WIRE)--Aug 1, 2018--First Interstate BancSystem, Inc.'s (NASDAQ: FIBK) Board of Directors, at a meeting held on August 1, 2018, declared a dividend of $0.28 per common share. The dividend is payable on August 21, 2018 to owners of record as of August 10, 2018. The dividend equates to a 2.67% annualized yield based on the $42.00 per share average closing price of the Company's common stock as reported on Nasdaq during the second quarter of 2018.

About First Interstate BancSystem, Inc.

First Interstate BancSystem, Inc. is a financial and bank holding company incorporated in 1971 and headquartered in Billings, Montana. The Company operates banking offices, including detached drive-up facilities, in communities across Idaho, Montana, Oregon, South Dakota, Washington, and Wyoming. Through First Interstate Bank, the Company delivers a comprehensive range of banking products and services to individuals, businesses, municipalities, and other entities throughout the Company's market areas.

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CONTACT: First Interstate BancSystem, Inc.

Marcy Mutch, 406-255-5312

Chief Financial Officer

marcy.mutch@fib.com

www.FIBK.com

KEYWORD: UNITED STATES NORTH AMERICA MONTANA

INDUSTRY KEYWORD: PROFESSIONAL SERVICES BANKING FINANCE

SOURCE: First Interstate BancSystem, Inc.

Copyright Business Wire 2018.

PUB: 08/01/2018 01:08 PM/DISC: 08/01/2018 01:08 PM

http://www.businesswire.com/news/home/20180801005780/en