[144/A] FIRST INTERSTATE BANCSYSTEM INC SEC Filing

Rhea-AI Filing Summary

Notice of proposed sale of 20,000 common shares by a related person through Goldman Sachs. The filer intends to sell $636,800 worth of Common stock (20,000 shares) on 10/07/2025 on the NASD. The filer reports 104,509,863 shares outstanding for the issuer. The 20,000 shares were acquired as a gift on 06/20/2020 from a "Scott Family Member," with the donor's acquisition date listed as 11/03/1993. No securities of the issuer were sold by the filer in the past three months. The notice includes the required certification that the seller is not aware of undisclosed material adverse information.

Positive

• Full Rule 144 fields provided: acquisition date, donor date, broker, and shares outstanding are disclosed
• No sales in prior three months: filer reports "Nothing to Report" for recent dispositions

Negative

• Material information reliance: seller's representation they know no undisclosed material adverse information is a self-certification rather than independent verification
• Limited context on beneficial owner: filer identity and relationship specifics are not detailed in the notice

Insights

Securities Compliance Analyst

Sale appears procedural and Rule 144-compliant on its face.

The notice documents a proposed sale of $636,800 (20,000 common shares) through Goldman Sachs on 10/07/2025, and records the acquisition as a gift on 06/20/2020. Key compliance items—acquisition nature, donor acquisition date, broker identity, and shares outstanding—are provided, which are typical for a Rule 144 filing.

Risks center on accurate disclosure of any material nonpublic information and aggregation rules for related sellers; the signer certifies absence of undisclosed material adverse information. Monitor for any subsequent amendments, actual trade execution records, or additional filings within the pre- and post-sale window.

Equity Capital Markets Specialist

Transaction size is immaterial to total float but taxable and market-impact considerations remain.

At 20,000 shares versus 104,509,863 shares outstanding, the proposed sale represents a small fraction of outstanding stock (traceable from provided counts). Execution through a major broker may minimize market impact for that volume. The aggregate market value is listed as $636,800, which will be relevant for tax and reporting purposes for the seller.

Investors may note timing (10/07/2025) and that no related sales occurred in the prior three months; watch for a Form 4 or amendment confirming executed disposition and any insider aggregation statements within the statutory window.

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/A

144/A: Filer Information

Filer CIK
Filer CCC
Previous Accession Number Of The Filing
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144/A: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

144/A: 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	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	20000	636800	104509863	10/07/2025	NASD

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/A: 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	06/20/2020	Gift	Scott Family Member		11/03/1993	20000	06/20/2020	None

* 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/A: Securities Sold During The Past 3 Months

Nothing to Report

144/A: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What is being sold in the FIBK 144/A filing?

The filing proposes sale of 20,000 common shares with an aggregate market value of $636,800.

When is the proposed sale date for the FIBK shares?

The approximate sale date listed is 10/07/2025.

How were the shares acquired according to the filing?

The 20,000 shares were acquired as a gift on 06/20/2020 from a "Scott Family Member."

Through which broker will the shares be sold?

The broker named is Goldman Sachs & Co. LLC at their New York address.

Does the filing report any other sales in the past three months?

No; the filing states "Nothing to Report" for securities sold during the past three months.