| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Stockman Bank of Montana | Bank | 3 | $568.7M | 19.23% |
| 2 | First Interstate Bank | Bank | 3 | $512.8M | 17.34% |
| 3 | U.S. Bank National Association | Bank | 3 | $395.7M | 13.38% |
| 4 | Montana Federal Credit Union | Credit union | 4 | $316.7M* | 10.71% |
| 5 | Wells Fargo Bank, National Association | Bank | 2 | $313.3M | 10.60% |
| 6 | Horizon Credit Union | Credit union | 2 | $111.7M* | 3.78% |
| 7 | Citizens Alliance Bank | Bank | 2 | $106.1M | 3.59% |
| 8 | 1St Liberty Federal Credit Union | Credit union | 4 | $104.2M* | 3.52% |
| 9 | Bravera Bank | Bank | 2 | $100.6M | 3.40% |
| 10 | Clearwater Federal Credit Union | Credit union | 1 | $85.9M* | 2.91% |
| 9 more institutions, year-over-year share and branch changes with Pro →$29/mo, cancel any time. | |||||
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $2.96B | 19 | 36 | Stockman Bank of Montana | 19.2% | 1,157 |
| 2025 | $2.80B | 18 | 36 | Stockman Bank of Montana | 19.4% | 1,183 |
| 2024 | $2.73B | 19 | 36 | First Interstate Bank | 19.1% | 1,200 |
| 2023 | $2.77B | 19 | 34 | First Interstate Bank | 18.9% | 1,212 |
| 2022 | $2.71B | 16 | 30 | First Interstate Bank | 20.9% | 1,425 |
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.