Sec Form 4 Filing - SCOTT JAMES R @ FIRST INTERSTATE BANCSYSTEM INC - 2022-08-10

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person SCOTT JAMES R 2. Issuer Name and Ticker or Trading Symbol FIRST INTERSTATE BANCSYSTEM INC [ FIBK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) PO BOX 7113 3. Date of Earliest Transaction (MM/DD/YY) 08/10/2022 (Street) BILLINGS, MT59103 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 12,651 D Class A Common Stock 08/10/2022 G V 12,425 D $ 0 4,414,335( 1 ) I see footnote( 1 )( 2 ) Class A Common Stock 08/10/2022 G V 6,215( 3 ) D $ 0 4,408,120( 1 ) I see footnote( 1 )( 2 ) Class A Common Stock 08/10/2022 G V 6,215( 3 ) A $ 0 4,414,335( 1 ) I see footnote( 1 )( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other SCOTT JAMES R PO BOX 7113 BILLINGS, MT59103 X X J.S. Investments Limited Partnership P.O. BOX 7113 BILLINGS, MT59103 X James F Heyneman Conservatorship, James Scott, Conservator P.O. BOX 7113 BILLINGS, MT59103 X James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs P.O. BOX 7113 BILLINGS, MT59103 X Foundation for Community Vitality P.O. BOX 7113 BILLINGS, MT59103 X James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees P.O. BOX 7113 BILLINGS, MT59103 X James R & Christine M Scott Foundation P.O. BOX 7113 BILLINGS, MT59103 X Signatures /s/ Kirk D. Jensen, Attorney-in-Fact for Reporting Person 08/12/2022 Signature of Reporting Person Date JAMES R. SCOTT, by: + 08/12/2022 Signature of Reporting Person Date J.S. Investments Limited Partnership, by: + 08/12/2022 Signature of Reporting Person Date JAMES F HEYNEMAN CONSERVATORSHIP, JAMES SCOTT, CONSERVATOR, by: + 08/12/2022 Signature of Reporting Person Date JAMES R SCOTT TRUST, JAMES R SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TTEES, by + 08/12/2022 Signature of Reporting Person Date FOUNDATION FOR COMMUNITY VITALITY, by:+ 08/12/2022 Signature of Reporting Person Date JAMES F HEYNEMAN TRUST, JAMES SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TRUSTEES, by: + 08/12/2022 Signature of Reporting Person Date JAMES R AND CHRISTINE M SCOTT FOUNDATION, by: + 08/12/2022 Signature of Reporting Person Date +/s/ Timothy Leuthold, Attorney-in-Fact 08/12/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Composed of 1,989,545 shares held of record by James R. Scott Trust, James R. Scott & First Interstate Wealth Management Co-TTEEs, 17,764 shares held of record by James R. Scott's 401k plan, 35,240 shares held of record by James R. and Christine M Scott Foundation, 1,901,036 shares held of record by JS Investments Limited Partnership, 346,786 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F. Heyneman Conservatorship, James Scott, Conservator, 7,096 shares held of record by James F. Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 43,866 shares held of record by James R. Scott's spouse. ( 2 )As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective unless expressly noted otherwise by footnote. The nature of beneficial ownership is described in detail by footnote for all reporting persons. ( 3 )Shares disposed of by James R. Scott Trust to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, as a bona fide gift.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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