| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| SCOTT JAMES R | 10%+ Owner | P.O. BOX 7113, BILLINGS, | /s/ Timothy Leuthold, | 2025-12-15 | 0001198533 |
| James R Scott Trust, James R Scott & First Interstate Wealth Management Co-TTEEs | 10%+ Owner | P.O. BOX 7113, BILLINGS, | JAMES R SCOTT TRUST, JAMES R SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TTEES, by + | 2025-12-15 | 0001908712 |
| JS Investments Limited Partnership | 10%+ Owner | P.O. BOX 7113, BILLINGS, | J.S. Investments Limited Partnership, by: + | 2025-12-15 | 0001908658 |
| James R & Christine M Scott Foundation | 10%+ Owner | P.O. BOX 7113, BILLINGS, | JAMES F HEYNEMAN CONSERVATORSHIP, JAMES SCOTT, CONSERVATOR, by: + | 2025-12-15 | 0001909853 |
| Foundation for Community Vitality | 10%+ Owner | P.O. BOX 7113, BILLINGS, | JAMES R AND CHRISTINE M SCOTT FOUNDATION, By: + | 2025-12-15 | 0001908742 |
| James F Heyneman Conservatorship, James Scott, Conservator | 10%+ Owner | P.O. BOX 7113, BILLINGS, | FOUNDATION FOR COMMUNITY VITALITY, by:+ | 2025-12-15 | 0001908854 |
| James F Heyneman Trust, James Scott & First Interstate Wealth Management Co-Trustees | 10%+ Owner | P.O. BOX 7113, BILLINGS, | JAMES F HEYNEMAN TRUST, JAMES SCOTT & FIRST INTERSTATE WEALTH MANAGEMENT CO-TRUSTEES, by: + | 2025-12-15 | 0001908844 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | FIBK | Common Stock | Gift | $0 | -755 | -0.02% | $0.00 | 4.43M | Dec 12, 2025 | see footnote | F1, F2, F3 |
| transaction | FIBK | Common Stock | Gift | $0 | +755 | +0.02% | $0.00 | 4.43M | Dec 12, 2025 | see footnote | F1, F2, F3 |
| transaction | FIBK | Common Stock | Gift | $0 | -755 | -0.02% | $0.00 | 4.43M | Dec 8, 2025 | see footnote | F2, F3, F4 |
| transaction | FIBK | Common Stock | Gift | $0 | +755 | +0.02% | $0.00 | 4.43M | Dec 8, 2025 | see footnote | F2, F3, F4 |
| Id | Content |
|---|---|
| F1 | Shares disposed of by James R. Scott's spouse to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott's spouse as a bona fide gift. |
| F2 | As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, 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 herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 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. The nature of beneficial ownership is described in detail by footnote for all reporting persons. |
| F3 | 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 401k, 35,240 shares held of record by James R and Christine M Scott Foundation, 1,901,036 shares held of record by JS Investments Limited Partnership, 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 41,075 shares held of record by James R. Scott's spouse. |
| F4 | Shares disposed of by James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's to Foundation for Community Vitality, and shares acquired by Foundation for Community Vitality from James R. Scott Trust, James R Scott & First Interstate Wealth Managment Co-TTEEs's, as a bona fide gift. |