| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Opportunity Bank of Montana | Bank | 1 | $69.7M | 35.28% |
| 2 | Citizens Bank & Trust Company | Bank | 1 | $64.5M | 32.62% |
| 3 | American Bank | Bank | 1 | $34.2M | 17.29% |
| 4 | Sky Federal Credit Union | Credit union | 1 | $29.3M* | 14.81% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $197.6M | 4 | 4 | Opportunity Bank of Montana | 35.3% | 2,827 |
| 2024 | $192.6M | 4 | 4 | Opportunity Bank of Montana | 34.4% | 2,841 |
| 2023 | $196.7M | 4 | 4 | Citizens Bank & Trust Company | 37.2% | 2,755 |
| 2022 | $202.4M | 4 | 4 | Citizens Bank & Trust Company | 36.6% | 2,784 |
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.