Insider plans sale of 1,579 common shares

An affiliate of FIBK has filed a Form 144 indicating an intention to sell 1,579 common shares through Fidelity Brokerage Services LLC on or about February 11, 2026 on the NASDAQ market.

Rhea-AI Filing Summary

An affiliate of FIBK has filed a Form 144 indicating an intention to sell 1,579 common shares through Fidelity Brokerage Services LLC on or about February 11, 2026 on the NASDAQ market. The filing lists an aggregate market value of $59,970.42 for these shares, compared with 102,890,614 common shares outstanding for the issuer. The shares to be sold were acquired through restricted stock vesting granted by the issuer as compensation between February 2024 and February 2026.

FAQ

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

What does the Form 144 filing for FIBK indicate?

The Form 144 shows an affiliate of FIBK intends to sell 1,579 common shares. The planned sale has an aggregate market value of $59,970.42 and will be executed through Fidelity on the NASDAQ around February 11, 2026.

How many FIBK shares are proposed to be sold under this Form 144?

The filing covers a proposed sale of 1,579 common shares. These shares were previously acquired through restricted stock vesting awards from the issuer between February 2024 and February 2026 as part of compensation rather than open-market purchases.

What is the aggregate market value of the FIBK shares in this Form 144?

The Form 144 lists an aggregate market value of $59,970.42 for the 1,579 common shares. This figure reflects the market value at the time of the notice and helps investors gauge the dollar size of the potential insider sale.

How does the planned FIBK share sale compare to total shares outstanding?

The issuer reports 102,890,614 common shares outstanding. The planned sale of 1,579 shares represents a very small portion of this total, indicating the transaction is limited in scale relative to the company’s overall equity base.

How were the FIBK shares in the Form 144 originally acquired?

The shares were acquired through restricted stock vesting from the issuer as compensation. Vesting dates include February 9, 2024, March 15, 2024, February 9, 2025, and February 9, 2026, rather than being bought for cash on the open market.

Which broker and exchange are involved in the proposed FIBK sale?

The Form 144 identifies Fidelity Brokerage Services LLC as the broker handling the transaction. The shares are planned to be sold on the NASDAQ exchange, with an approximate sale date of February 11, 2026, subject to actual trading execution.

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

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Accepted by SEC EDGAR 02/11/2026 - 02:03 PM EST Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001965779
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	FIRST INTERSTATE BANCSYSTEM INC
SEC File Number	001-34653
Address of Issuer	401 NO 31ST STREET BILLINGS MONTANA 59101
Phone	4062555311
Name of Person for Whose Account the Securities are To Be Sold	Asker Lorrie F
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	1579	59970.42	102890614	02/11/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/09/2024	Restricted Stock Vesting	Issuer			281	02/09/2024	Compensation
Common	03/15/2024	Restricted Stock Vesting	Issuer			225	03/15/2024	Compensation
Common	02/09/2025	Restricted Stock Vesting	Issuer			478	02/09/2025	Compensation
Common	02/09/2026	Restricted Stock Vesting	Issuer			595	02/09/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	02/11/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Lorrie Asker
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)