Insider entities sell 15,000 FIBK shares

FIRST INTERSTATE BANCSYSTEM INC reported indirect insider sales of its Common Stock by entities associated with Julie A Scott-Rose.

Rhea-AI Filing Summary

FIRST INTERSTATE BANCSYSTEM INC reported indirect insider sales of its Common Stock by entities associated with Julie A Scott-Rose. On June 18, 2026, these entities executed three open-market sales totaling 15,000 shares at prices between $35.95 and $35.98 per share. The filing shows that hundreds of thousands of shares remain held indirectly across the Julie A Scott Rose trusts and IXL Limited Liability Company, over which Ms. Scott-Rose shares voting and dispositive power with a sibling and where beneficial ownership is disclaimed beyond any pecuniary interest.

Insider Trade Summary

Net Seller: 15,000 shares

Net Sell 3 txns

Insider SCOTT JULIE A, Julie A Scott Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-2002, IXL Ltd Liability Co, Juliana Sarah Scott Rose Trust, Elizabeth Lauren Scott Rose Trust

Role 10% Owner | 10% Owner | 10% Owner | 10% Owner | 10% Owner

Sold 15,000 shs ($540K)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$35.95	$180K
Sale	Common Stock	5,000	$35.98	$180K
Sale	Common Stock	5,000	$35.97	$180K

Holdings After Transaction: Common Stock — 488,359 shares (Indirect, See Footnote)

Footnotes (4)

1. F1. Composed of 218,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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. F2. Composed of 213,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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.
3. F3. Composed of 208,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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.
4. F4. 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 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.

Key Figures

Total shares sold: 15,000 shares First sale price: $35.97 per share Second sale price: $35.98 per share +4 more

7 metrics

Total shares sold 15,000 shares Aggregate of three open-market Common Stock sales on June 18, 2026

First sale price $35.97 per share 5,000-share open-market sale of Common Stock

Second sale price $35.98 per share 5,000-share open-market sale of Common Stock

Third sale price $35.95 per share 5,000-share open-market sale of Common Stock

Indirect holding example 488,359 shares Total shares following one reported transaction in indirect ownership

IXL LLC component 209,678 shares Shares held by IXL Limited Liability Company with shared voting and dispositive power

Julie A Scott Rose Trust component 218,216 shares Shares held of record by the Julie A Scott Rose Trust in one footnote example

Key Terms

open-market sale, beneficial ownership, dispositive power, pecuniary interest, +1 more

5 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

beneficial ownership financial

"may be deemed to share beneficial ownership of the securities reported"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

dispositive power financial

"over which Ms. Rose has shared voting and dispositive power with a sibling"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

pecuniary interest financial

"disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest"

indirect ownership financial

"transaction_is_sell": true, "ownership_type": "indirect""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FIBK disclose for Julie A Scott-Rose–related entities?

FIRST INTERSTATE BANCSYSTEM INC disclosed that entities associated with Julie A Scott-Rose executed three open-market sales totaling 15,000 Common Stock shares. The trades occurred on June 18, 2026, and were reported as indirect transactions through trusts and an LLC linked to Ms. Scott-Rose.

At what prices were the FIBK shares sold in the reported insider transactions?

The entities associated with Julie A Scott-Rose sold FIBK Common Stock at per-share prices of $35.97, $35.98, and $35.95. These were open-market sales, with each transaction involving 5,000 shares and reported as indirect holdings through related trusts and an LLC.

How many FIBK shares were sold and how many remain after the insider sales?

The filing shows total insider sales of 15,000 FIBK Common Stock shares across three 5,000-share open-market trades. Following these transactions, the tables list remaining indirect positions in the hundreds of thousands of shares across the related trusts and IXL Limited Liability Company entities.

Who actually holds the FIBK shares involved in the reported insider sales?

The shares are held of record by the Julie A Scott Rose Trust, the Juliana Sarah Scott Rose Trust, the Elizabeth Lauren Scott Rose Trust, and IXL Limited Liability Company. Julie A Scott-Rose shares voting and dispositive power over IXL and disclaims beneficial ownership beyond her pecuniary interest.

How is beneficial ownership of the FIBK shares characterized in this insider filing?

The filing states the reporting persons may be deemed part of a group with other stockholders and may be deemed to share beneficial ownership. Each reporting person disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest in the reported FIBK Common Stock holdings.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/18/2026 - 05:51 PM EDT Learn about SEC filing dates

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)

PO BOX 7113

(Street)

BILLINGS MONTANA 59103

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/18/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/18/2026		S		5,000	D	$35.95	498,359	I	See Footnote(1)(4)
Common Stock	06/18/2026		S		5,000	D	$35.98	493,359	I	See Footnote(2)(4)
Common Stock	06/18/2026		S		5,000	D	$35.97	488,359	I	See Footnote(3)(4)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

SCOTT JULIE A

(Last) (First) (Middle)

PO BOX 7113

(Street)

BILLINGS MONTANA 59103

(City) (State) (Zip)

UNITED STATES

(Country)

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)

PO BOX 7113

(Street)

BILLINGS MONTANA 59103

(City) (State) (Zip)

UNITED STATES

(Country)

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)

PO BOX 7113

(Street)

BILLINGS WYOMING 82836

(City) (State) (Zip)

UNITED STATES

(Country)

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 MONTANA 59103

(City) (State) (Zip)

UNITED STATES

(Country)

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 MONTANA 59103

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. Composed of 218,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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. Composed of 213,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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.

3. Composed of 208,216 shares held of record by Julie A Scott-Rose Trustee of the Julie A Scott Rose Trust Dated 5-14-02, 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.

4. 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 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	06/18/2026
	JULIE SCOTT ROSE, /s/ Timothy J. Leuthold, Attorney-in-Fact for Reporting Person	06/18/2026
	Juliana Sarah Scott Rose Trust, By: +/ s/ Timothy J. Leuthold, Attorney-in- Fact for Reporting Person	06/18/2026
	Elizabeth Lauren Scott Rose Trust, By: +/ s/ Timothy J. Leuthold, Attorney-in- Fact for Reporting Person	06/18/2026
	** 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: SEC 1474 (03-26)