| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | Citizens Bank & Trust Company | Bank | 1 | $73.4M | 37.65% |
| 2 | Opportunity Bank of Montana | Bank | 1 | $59.3M | 30.42% |
| 3 | American Bank | Bank | 1 | $32.8M | 16.80% |
| 4 | Sky Federal Credit Union | Credit union | 1 | $29.5M* | 15.14% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $195.0M | 4 | 4 | Citizens Bank & Trust Company | 37.6% | 2,854 |
| 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 | $197.7M | 4 | 4 | Citizens Bank & Trust Company | 37.0% | 2,746 |
| 2022 | $203.4M | 4 | 4 | Citizens Bank & Trust Company | 36.5% | 2,773 |
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.