| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Stockman Bank of Montana | Bank | 1 | $124.2M | 53.54% |
| 2 | First Interstate Bank | Bank | 1 | $49.5M | 21.35% |
| 3 | Native American Bank, National Association | Bank | 1 | $32.2M | 13.89% |
| 4 | 1St Liberty Federal Credit Union | Credit union | 1 | $26.1M* | 11.23% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $232.1M | 4 | 4 | Stockman Bank of Montana | 53.5% | 3,641 |
| 2025 | $222.5M | 4 | 4 | Stockman Bank of Montana | 50.4% | 3,444 |
| 2024 | $212.9M | 4 | 4 | Stockman Bank of Montana | 49.7% | 3,383 |
| 2023 | $228.6M | 4 | 4 | Stockman Bank of Montana | 52.7% | 3,623 |
| 2022 | $211.8M | 4 | 4 | Stockman Bank of Montana | 54.5% | 3,700 |
Every institution above links to its profile — ratios, peer medians and this quarter’s change signals. Pro adds the full table, share movement and CSV export.