| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First State Bank of Forsyth | Bank | 1 | $143.4M | 46.85% |
| 2 | First Interstate Bank | Bank | 2 | $135.7M | 44.36% |
| 3 | Opportunity Bank of Montana | Bank | 1 | $15.6M | 5.09% |
| 4 | Northwestern Energy Employees Federal Credit Union | Credit union | 1 | $10.4M* | 3.39% |
| 5 | The Morning Star Federal Credit Union | Credit union | 1 | $914K* | 0.30% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $306.0M | 5 | 6 | First State Bank of Forsyth | 46.9% | 4,200 |
| 2025 | $296.7M | 5 | 6 | First Interstate Bank | 47.4% | 4,246 |
| 2024 | $220.6M | 4 | 5 | First State Bank of Forsyth | 56.6% | 4,268 |
| 2023 | $203.2M | 4 | 5 | First State Bank of Forsyth | 59.3% | 4,376 |
| 2022 | $218.2M | 4 | 5 | First State Bank of Forsyth | 59.5% | 4,310 |
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.