| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| HEYNEMAN JOHN M JR | Director, 10%+ Owner | P.O. BOX 7113, BILLINGS | /s/ Kirk D. Jensen, Attorney-in-Fact for Reporting Person | 03 Jun 2025 | 0001198518 |
| John M Heyneman Jr. Trust | 10%+ Owner | P.O. BOX 7113, BILLINGS | Riki Rae Scott Davidson and John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust By+ | 03 Jun 2025 | 0001908848 |
| Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust | 10%+ Owner | P.O. BOX 7113, BILLINGS | Rae Ann Morss and John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust By+ | 03 Jun 2025 | 0001908849 |
| Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust | 10%+ Owner | P.O. BOX 7113, BILLINGS | Towanda Investments Limited Partnership By+ | 03 Jun 2025 | 0001908784 |
| Towanda Investments Limited Partnership | 10%+ Owner | P.O. BOX 7113, BILLINGS | John M. Heyneman, Jr. Trust By+ | 03 Jun 2025 | 0001908810 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | FIBK | Common Stock | Award | $0 | +2,946 | +21% | $0.000000 | 17,042 | 01 Jun 2025 | Direct | F1 |
| holding | FIBK | Common Stock | 1,414,636 | 01 Jun 2025 | see footnote | F2, F3 |
| Id | Content |
|---|---|
| F1 | Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2026, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's [next] annual stockholder meeting. |
| 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 John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons. |
| F3 | Composed of 150,000 shares held of record by John M Heyneman Jr. Trust, 85,836 shares held of record by Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust, 85,836 shares held of record by Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust, 1,085,792 shares held of record by Towanda Investments Limited Partnership, 4,552 shares held of record by John Heyneman, Jr.'s spouse, 1095 shares held of record by John Heyneman, Jr.'s daughter, 1,215 shares held of record by John Heyneman, Jr.'s son Quinn, and 310 shares held of record by John Heyneman, Jr.'s son Bae-John. |