First Interstate Bancsystem SEC Filings

A holder of FIBK common stock has filed a notice of proposed sale under Rule 144. The filing covers the planned sale of 615 common shares through Morgan Stanley Smith Barney, with an aggregate market value of $23,142.45, to be sold on the NASDAQ around 02/03/2026. The issuer had 102,890,614 common shares outstanding at the time referenced.

The 615 shares to be sold were originally received in 2016 as gifts from affiliate John Heyneman/John Heyneman Jr. in amounts of 211 and 404 shares. Over the prior three months, related entities Bench Ranch LLC and AWE' LLC sold 15,000 and 20,000 common shares for gross proceeds of $482,162.50 and $641,298.00, respectively. The signer represents they know no undisclosed material adverse information about the issuer’s operations.

The Vanguard Group filed an amended Schedule 13G reporting a passive ownership stake in First Interstate BancSystem Inc. common stock as of 12/31/2025.

Vanguard reports beneficial ownership of 10,048,419 shares, representing 9.76% of the class, with 0 shares having sole voting or dispositive power and 706,628 shares subject to shared voting power. All 10,048,419 shares are subject to shared dispositive power.

The filing notes an internal realignment effective 01/12/2026, after which certain Vanguard subsidiaries or business divisions may report beneficial ownership separately on a disaggregated basis while pursuing the same investment strategies. Vanguard states its clients have the right to dividends and sale proceeds, and no other single client holds more than 5% of the class. The certification confirms the holdings are in the ordinary course of business and not for changing or influencing control of the issuer.

First Interstate BancSystem, Inc. filed a current report outlining several shareholder updates. The company issued a press release covering its financial results for the quarter ended December 31, 2025, and furnished it as an exhibit. It also posted an updated corporate presentation on its website, providing an overview of the company and its operations.

The Board of Directors declared a cash dividend of $0.47 per share, payable on February 20, 2026, to shareholders of record as of February 10, 2026. These materials are furnished as exhibits and are not deemed filed for liability purposes under federal securities laws.

BlackRock, Inc. filed an amended Schedule 13G/A reporting a significant ownership position in First Interstate BancSystem Inc. Class A stock as of 12/31/2025. BlackRock reports beneficial ownership of 13,290,004 Class A shares, representing 12.9% of the class. It has sole power to vote 13,073,231 shares and sole power to dispose of 13,290,004 shares, with no shared voting or dispositive power.

The filing notes that these securities are held by certain BlackRock business units and may be held on behalf of clients, including iShares Core S&P Small-Cap ETF, which on its own holds more than five percent of First Interstate’s outstanding common stock. BlackRock certifies that the shares were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of First Interstate BancSystem.

First Interstate BancSystem Inc. insider entities reported small stock sales. On January 5, 2026, entities associated with the Scott family sold 3,173 shares of First Interstate BancSystem common stock at a weighted average price of $36.20. On January 6, 2026, they sold an additional 1,827 shares at a weighted average price of $36.92. After these transactions, 936,024 shares of common stock were reported as beneficially owned on an indirect basis. The filing explains that these holdings are spread across the Jonathan R. Scott trust, IXL Limited Liability Company, several Scott family trusts, and Jonathan Scott’s spouse, and notes that the reporting persons may be deemed part of a group while disclaiming beneficial ownership beyond their pecuniary interest.

First Interstate BancSystem Inc. director and 10% owner Jeremy Scott reported a transaction in the company’s common stock dated 12/08/2025. The filing shows a code "G" transaction involving 550 shares at a stated price of $0, after which Scott’s directly held shares totaled 3,496.

The filing also reports 3,512,449 shares of common stock as indirectly beneficially owned. According to the footnotes, these are composed of 3,416,108 shares held of record by NBar 5 Limited Partnership, 93,511 shares held of record by the Jeremy Scott Revocable Trust, and 2,830 shares held of record by Scott’s spouse. The reporting persons state that, due to certain agreements with other stockholders, they may be deemed part of a group and may be deemed to share beneficial ownership, while each disclaims beneficial ownership except to the extent of its pecuniary interest.

First Interstate BancSystem Inc. director-affiliated entities reported internal transfers of the company’s common stock. On 12/08/2025 and 12/12/2025, 755 shares were transferred each time at a price of $0, coded as bona fide gifts, including moves from James R. Scott’s spouse and from the James R. Scott Trust to the Foundation for Community Vitality.

A footnote explains that 4,433,211 common shares are held of record across multiple vehicles associated with James R. Scott, including trusts, a 401(k), foundations, a limited partnership, a conservatorship and a separate trust. The reporting persons state they may be deemed part of a group with certain other stockholders under existing agreements and disclaim beneficial ownership of such securities beyond their pecuniary interests.

First Interstate BancSystem Inc. (FIBK)11/21/2025, they sold 30,432 shares of common stock at a price of $31.03 per share.

After this transaction, they report indirect beneficial ownership of 1,414,636 shares of common stock, as detailed in the footnotes describing various trusts, family members, and an investment partnership. Additional positions include 47,482 shares held indirectly by Awe' LLC, 5,224 shares held directly, and 30,154 shares held indirectly by Bench Ranch LLC.

The filing notes that, due to certain agreements with other stockholders, the reporting persons may be deemed part of a group and may be deemed to share beneficial ownership of the reported securities, although each disclaims beneficial ownership beyond its pecuniary interest.

First Interstate BancSystem Inc. (FIBK)11/24/2025, the officer acquired 1,591 shares of common stock at a price of $31.42 per share, increasing direct beneficial ownership to 3,899 shares after the transaction.

The new shares are tied to restricted stock units granted under the company’s 2023 Equity and Incentive Plan. These units will vest in three equal annual installments beginning on November 24, 2026, and each installment requires the officer to remain employed through the applicable vesting date.