| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First International Bank & Trust | Bank | 3 | $1.00B | 71.34% |
| 2 | Cornerstone Bank | Bank | 1 | $296.1M | 21.12% |
| 3 | BNC National Bank | Bank | 1 | $69.7M | 4.97% |
| 4 | Dakota West Credit Union | Credit union | 1 | $35.9M* | 2.56% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $1.40B | 4 | 6 | First International Bank & Trust | 71.3% | 5,567 |
| 2024 | $1.24B | 4 | 6 | First International Bank & Trust | 74.8% | 5,943 |
| 2023 | $1.14B | 4 | 6 | First International Bank & Trust | 73.8% | 5,805 |
| 2022 | $1.18B | 4 | 6 | First International Bank & Trust | 74.1% | 5,834 |
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.