First Interstate Bancsystem SEC Filings

Insider transactions at First Interstate BancSystem, Inc. (FIBK) reported on a Form 4 show the reporting persons acquired additional common stock in August and September 2025. On 08/05/2025 the reporting persons acquired 216 shares at $0 resulting in 3,512,449 shares beneficially owned; on 09/03/2025 they acquired 22,928 shares at $0 resulting in 3,512,233 shares beneficially owned after that transaction. Beneficial ownership is held directly and indirectly through NBar5 Limited Partnership, the Jeremy Scott Revocable Trust, and Jeremy Scott's spouse, with 3,416,108 shares held of record by NBar5 Limited Partnership, 93,511 shares by the trust, and 2,830 shares by the spouse. Signatures on the filing are dated 09/05/2025. Footnotes state the parties may be members of a group and disclaim ownership except for pecuniary interest.

Renu Agrawal filed an initial Form 3 as a Director of First Interstate BancSystem, Inc. (FIBK) and reported that she did not beneficially own any common stock at the time of this initial statement. The filing notes an executed power of attorney on file and was submitted by an attorney-in-fact on behalf of the reporting person.

First Interstate BancSystem, Inc. (FIBK) Form 144 shows a proposed sale of 40,000 shares of common stock through Piper Sandler at an aggregate market value of $1,308,800.00, with an approximate sale date of 09/02/2025 on Nasdaq. The shares were acquired on 01/02/1976 as pre-IPO stock and payment was in cash.

The filing also discloses two recent sales by the Susan Scott Heyneman Trust of 55,000 shares each on 07/14/2025 and 08/01/2025, producing gross proceeds of $1,711,231.50 and $1,532,052.50 respectively. The filer certifies no undisclosed material adverse information and follows Rule 144 disclosure requirements.

Reporting person: The Form 4 was filed by the Susan Scott Heyneman Trust, with Susan Heyneman and First Interstate Wealth Management Co. as co-trustees.

Transaction: On 09/02/2025 the reporting person disposed of 10,000 shares of First Interstate BancSystem, Inc. (FIBK) at a price of $32.28 per share (transaction code S). After the sale the reporting person is reported to beneficially own 519,256 shares, held of record by the trust.

Other details: The filer states that, under certain agreements with other stockholders, the reporting persons may be deemed members of a group and may be deemed to share beneficial ownership of the reported shares, but each disclaims beneficial ownership except to the extent of pecuniary interest.

First Interstate BancSystem, Inc. announced that the Board appointed Ms. Renu Agrawal as a Class III director to fill a newly created vacancy, with her term expiring at the 2027 annual meeting. Ms. Agrawal brings extensive industry experience, including 13 years at Wells Fargo leading strategic initiatives and multiple divisions, prior COO roles at ValleyCrest Companies and Quisic Corporation, consulting experience at McKinsey, and earlier scientific work at Polaroid. The Board determined she is an independent director under NASDAQ rules. She will receive standard non-employee director compensation, including restricted stock units, and will join the Governance and Nominating Committee and the Technology, Innovation and Operations Committee. Following the appointment, the Board has 14 members across three classes.

Michael L. Scudder, a Director of First Interstate BancSystem, Inc. (FIBK), acquired 1,879 shares of the company's common stock on 08/27/2025 at a price of $31.93 per share. These shares represent restricted stock units granted under the registrant's 2023 Equity and Incentive Plan and are issuable upon vesting. The restricted stock units vest on June 1, 2026, conditioned on the reporting person's continued service through that date. Following the reported transaction, the reporting person beneficially owns 1,879 shares in a direct ownership form.

First Interstate BancSystem, Inc. announced that its board approved a new stock repurchase program authorizing up to $150.0 million of common stock repurchases through March 31, 2027. As of July 31, 2025, the company had 104,856,752 shares outstanding and the closing share price was $32.20 on August 27, 2025. Repurchases may occur via open market purchases, private transactions, block trades, Rule 10b5-1 trading plans, or other lawful methods, and are intended to comply with Rule 10b-18 where applicable. The company said repurchases are discretionary, subject to market conditions, liquidity, alternative capital uses and other factors, and that it is not obligated to repurchase any specific amount of shares. Reporting of actual repurchases will appear in future Form 10-Q and 10-K filings.