Sec Form 4 Filing - Scott Jonathan R @ FIRST INTERSTATE BANCSYSTEM INC - 2023-02-22

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 Jonathan 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) 02/22/2023 (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 6,001 D Class A Common Stock 02/22/2023 G 1,350 ( 1 ) D $ 0 962,503 ( 2 ) I See Footnote ( 2 ) ( 3 )

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 Jonathan R PO BOX 7113 BILLINGS, MT59103 X X Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04 P.O. BOX 7113 BILLINGS, MT59103 X IXL Ltd Liability Co P.O. BOX 7113 BILLINGS, MT59103 X Harper Grace Scott Trust P.O. BOX 7113 BILLINGS, MT59103 X Harrison William Scott Trust P.O. BOX 7113 BILLINGS, MT59103 X Holland Elizabeth Scott Trust P.O. BOX 7113 BILLINGS, MT59103 X Signatures JONATHAN R. SCOTT, By: /s/ Kirk D. Jensen, Attorney-in-Fact for Reporting Person. 02/23/2023 Signature of Reporting Person Date HARRISON WILLIAM SCOTT TRUST, By: + 02/23/2023 Signature of Reporting Person Date HARPER GRACE SCOTT TRUST, By: + 02/23/2023 Signature of Reporting Person Date HOLLAND ELIZABETH SCOTT TRUST, By: + 02/23/2023 Signature of Reporting Person Date IXL Limited Liability Company, By:+ 02/23/2023 Signature of Reporting Person Date JONATHAN SCOTT AS TRUSTEE OF THE JONATHAN R SCOTT TRUST DATED AS OF 4/21/04, By: + 02/23/2023 Signature of Reporting Person Date +/s/ Timothy Leuthold, Attorney-in-Fact for Reporting Person 02/23/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Gift transaction by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04. ( 2 )Composed of 519,381 shares held of record by Jonathan Scott as Trustee of the Jonathan R Scott Trust Dated as of 4/21/04, 209,678 shares held of record by IXL Limited Liability Company, 61,148 shares held of record by Holland Elizabeth Scott Trust, 61,148 shares held of record by Harper Grace Scott Trust, 61,148 shares held of record by Harrison William Scott Trust and 50,000 shares held of record by Jonathan Scott's spouse. ( 3 )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 Jonathan R. Scott with the indication of direct or indirect ownership in Table I and Table II being made from Jonathan R. Scott's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

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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