FIRST INTERSTATE BANCSYSTEM INC

Filing Date

Feb 18, 2026

Transaction Date

Dec 31, 2025

Accession Number

0001493152-26-007249

Form Type

5

Footnotes

1. (F1)Composed of 1,989,882 shares held of record by James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs, 14,534 shares held of record by James R Scott's 401(k) plan, 35,240 shares held of record by James R and Christine M Scott Foundation, 346,563 shares held of record by Foundation for Community Vitality, 73,002 shares held of record by James F Heyneman Conservatorship, James Scott, Conservator, 31,879 shares held of record by James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees, and 40,870 shares held of record by James R. Scott's spouse. James R Scott ceased to have an indirect reportable beneficial ownership interest in the 1,901,036 shares held of record by JS Investments Limited Partnership upon his resignation in November 2025 as the Managing General Partner of such partnership.
2. (F2)As a result of agreements entered into among the reporting persons, the issuer, and other stockholders of the issuer signatory thereto, 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 therein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of his or its pecuniary interest therein. The reporting persons expect to file future Forms 4 or 5, if any, together with James R. Scott with the indication of direct or indirect ownership in Tables I and II being made from James R. Scott's perspective, unless expressly noted otherwise by footnote.
3. (F3)As a result of the resignation described in footnote 1 hereto, JS Investments Limited Partnership no longer intends to file future Forms 4 or 5 with the other reporting persons identified in the form. The nature of beneficial ownership is described in detail by footnote for all reporting persons.