Item 8.01 Other Events.



On May 25, 2022, the First Interstate BancSystem, Inc. (the "Company") board of
directors adopted a new stock repurchase program to replace the program that had
been in place since 2019 and had 1,889,158 shares of Class A common stock
remaining to be purchased thereunder. Under the new stock repurchase program,
the Company may repurchase up to 5 million of its outstanding shares of Class A
common stock. Any repurchased shares will be returned to authorized but unissued
shares of Class A common stock in accordance with Montana law. As of April 30,
2022, the Company had 109.5 million shares of Class A common stock issued and
outstanding and has not purchased any shares of its Class A common stock
year-to-date.

Under the new stock repurchase program, the Company intends to repurchase its
shares through authorized Rule 10b5-1 trading plans (which would permit the
Company to repurchase shares when the Company might otherwise be precluded from
doing so under applicable securities laws), open market purchases, private
transactions, block trades, or otherwise in accordance with applicable federal
securities laws, including Rule 10b-18 of the Securities Exchange Act of 1934,
as amended (the "Exchange Act"). Under the Company's Insider Trading Policy, the
Company can enter into a Rule 10b5-1 plan only during an open trading window.
The new stock repurchase program has no expiration date.

Adopting a written trading plan that satisfies the conditions of Rule 10b5-1
under the Exchange Act allows a company to repurchase its shares at times when
it might otherwise be prevented from doing so due to self-imposed trading
blackout periods or pursuant to applicable securities and insider trading laws.
An independent broker selected by the Company will have the authority under the
terms and limitations specified in its Rule 10b5-1 trading plan to repurchase
shares on the Company's behalf in accordance with the terms of the plan. After
the expiration of the current trading plan, the Company may from time to time
enter into subsequent trading plans under Rule 10b5-1 of the Exchange Act to
facilitate the repurchase of its Class A common stock pursuant to its stock
repurchase program.

Repurchases may also be made at management's discretion, subject to the insider
trading window periods imposed by the Company's insider trading policy, at
prices management and the board of directors consider to be attractive and in
the best interests of both the Company and its shareholders, subject to the
availability of shares of Class A common stock, general market conditions, the
trading price of the Class A common stock, alternative uses for capital, the
Company's financial performance, and other factors. Open market purchases will
be conducted in a manner intended to satisfy the requirements of, and in
accordance with the limitations set forth in, Rule 10b-18 under the Exchange Act
and other applicable legal requirements.

The timing and amount of share repurchases under the new repurchase program may
be suspended, terminated or modified by the Company at any time for any reason,
including market conditions, the cost of repurchasing shares, the availability
of alternative investment opportunities, liquidity, and other factors deemed
appropriate. These factors may also affect the timing and amount of share
repurchases. The Company is not obligated to repurchase any particular number of
shares or any shares in any specific time period.

Information regarding share repurchases will be available in the Company's periodic reports filed with the Securities and Exchange Commission on Forms 10-K and 10-Q as required by the applicable rules of the Exchange Act.

Forward-Looking Statements



This document contains "forward-looking statements" within the meaning of
Section 27A of the Securities Act of 1933, as amended, and Rule 175 promulgated
thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended,
and Rule 3b-6 promulgated thereunder, that involve inherent risks and
uncertainties, including statements regarding purchases of Class A common stock
pursuant to a Rule 10b5-1 trading plan or otherwise. Any statements about our
plans, objectives, expectations, strategies, beliefs, or future performance or
events constitute forward-looking statements. Such statements are identified by
words or phrases such as "believes," "expects," "anticipates," "plans,"
"trends," "objectives," "continues" or similar expressions, or future or
conditional verbs such as "will," "would," "should," "could," "might," "may" or
similar expressions. Forward-looking statements involve known and unknown risks,
uncertainties, assumptions, estimates and other important factors that could
cause actual results to differ materially from any results, performance or
events expressed or implied by such forward-looking statements.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibit Number Description



             104               Cover Page Interactive Data File (embedded

within Inline XBRL document).

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