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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549
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FORM 8-K
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CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
Date of report (date of earliest event reported): July 14, 2021
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FIRST INTERSTATE BANCSYSTEM, INC.
(Exact name of registrant as specified in its charter)
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Montana001-34653 81-0331430
(State or other jurisdiction of
incorporation or organization)
(Commission
File No.)
 (IRS Employer
Identification No.)
401 North 31st Street,
Billings,MT59116-0918
(Address of principal executive offices)(zip code)
(406)255-5390
(Registrant’s telephone number, including area code)
Not Applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a- 12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of exchange on which registered
Class A common stock, no par valueFIBKNASDAQ
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
    Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

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Item 5.02    Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
(b) On July 14, 2021, Dana L. Crandall notified First Interstate BancSystem, Inc. (the “Company”) that she was retiring as a Director of the Company effective at midnight on November 1, 2021. Her retirement is not related to a disagreement with the Company on any matter relating to the Company’s operations, policies or practices.
Item 9.01 Financial Statements and Exhibits.

(d)Exhibit NumberDescription
104Cover Page Interactive Data File (embedded within Inline XBRL document).




SIGNATURES
Pursuant to the requirements of the Securities and Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
Date: July 15, 2021
 
FIRST INTERSTATE BANCSYSTEM, INC.
By:/s/ KEVIN P. RILEY
Kevin P. Riley
President and Chief Executive Officer