Sell4

FIRST INTERSTATE BANCSYSTEM INC

FIBK

Total Value

$101.6K

Net $101.6K sold

Filing Date

Sep 16, 2026

1 transaction

Sales

$101.6K

1 transaction

Trade Summary

On Sep 16, 2026, SCOTT JULIE A, 10% Owner, sold $101.6K of FIRST INTERSTATE BANCSYSTEM INC (FIBK) across 1 transaction. The filing covers Common Stock and reflects net selling of $101.6K. Reported prices ranged from $37.64. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Price at the Time of the Trade

FIBK daily price with the insider's sale marked at $37.64.

Sold in the upper half of the 6-month range · the stock trades 2% lower today.

Price data is delayed and provided for context only — not investment advice.

Insider Information

Name: SCOTT JULIE A
Role: 10% Owner
Location: BILLINGS, MT

Filing Details

Filing Date: Sep 16, 2026
Transaction Date: Sep 16, 2026
Accession Number: 0001493152-26-042992
Form Type: 4
Net Trading Amount: -$101.6K

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Sep 16, 2026	Common Stock	2,700	$37.64	Sale	$101.6K

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Footnotes

(F1)Composed of 204,166 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02 (which trust effected the reported sale), 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.
(F2)As a result of certain agreements entered into among the reporting persons, the Issuer, and 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. The reporting persons disclaim beneficial ownership of any such securities, except to the extent of their pecuniary interests therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SCOTT JULIE A

(Last)

(First)

(Middle)

P O BOX 7113

(Street)

BILLINGS

59103

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
FIRST INTERSTATE BANCSYSTEM INC [ FIBK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/16/2026		S		2,700	D	$37.64	484,309	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

1. Name and Address of Reporting Person^*

SCOTT JULIE A

(Last)

(First)

(Middle)

P O BOX 7113

(Street)

BILLINGS

59103

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002

(Last)

(First)

(Middle)

P O BOX 7113

(Street)

BILLINGS

59103

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

IXL Ltd Liability Co

(Last)

(First)

(Middle)

P O BOX 7113

(Street)

BILLINGS

82836

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Juliana Sarah Scott Rose Trust

(Last)

(First)

(Middle)

PO BOX 7113

(Street)

BILLINGS

59103

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Elizabeth Lauren Scott Rose Trust

(Last)

(First)

(Middle)

PO BOX 7113

(Street)

BILLINGS

59103

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

Explanation of Responses:

1. Composed of 204,166 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02 (which trust effected the reported sale), 35,233 shares held of record by Juliana Sarah Scott Rose Trust, 35,232 shares held of record by Elizabeth Lauren Scott Rose Trust, and 209,678 shares held by IXL Limited Liability Company, over which Ms. Rose has shared voting and dispositive power with a sibling.

2. As a result of certain agreements entered into among the reporting persons, the Issuer, and 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. The reporting persons disclaim beneficial ownership of any such securities, except to the extent of their pecuniary interests therein. The reporting persons expect to file future Forms 4 and 5, if any, together with Julie Scott Rose with the indication of direct or indirect ownership in Table I and Table II being made from Julie Scott Rose's perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

	Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002, By: /s/ Timothy J. Leuthold, Attorney-in-Fact for Reporting Person	09/16/2026
	JULIE SCOTT ROSE, By: /s/ Timothy J. Leuthold, Attorney-in-Fact for Reporting Person	09/16/2026
	Juliana Sarah Scott Rose Trust, By: / s/ Timothy J. Leuthold, Attorney-in- Fact for Reporting Person	09/16/2026
	Elizabeth Lauren Scott Rose Trust, By: / s/ Timothy J. Leuthold, Attorney-in- Fact for Reporting Person	09/16/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001493152-26-042992.

FIRST INTERSTATE BANCSYSTEM INC

Trade Summary

Price at the Time of the Trade

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

Price at the Time of the Trade

SEC Form 4