| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First Interstate Bank | Bank | 9 | $1.97B | 22.88% |
| 2 | U.S. Bank National Association | Bank | 4 | $1.41B | 16.37% |
| 3 | Stockman Bank of Montana | Bank | 6 | $1.17B | 13.61% |
| 4 | Wells Fargo Bank, National Association | Bank | 4 | $996.1M | 11.59% |
| 5 | Glacier Bank | Bank | 7 | $884.7M | 10.29% |
| 6 | The Yellowstone Bank | Bank | 5 | $632.5M | 7.36% |
| 7 | Valley Financial Credit Union | Credit union | 7 | $270.6M* | 3.15% |
| 8 | Altana Federal Credit Union | Credit union | 5 | $241.8M* | 2.81% |
| 9 | Black Hills Federal Credit Union | Credit union | 2 | $201.1M* | 2.34% |
| 10 | Mountain America Federal Credit Union | Credit union | 1 | $180.8M* | 2.10% |
| 10 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 |
|---|---|---|---|---|---|---|
| 2025 | $8.60B | 20 | 69 | First Interstate Bank | 22.9% | 1,307 |
| 2024 | $7.96B | 20 | 70 | First Interstate Bank | 20.8% | 1,307 |
| 2023 | $7.76B | 19 | 66 | First Interstate Bank | 21.0% | 1,298 |
| 2022 | $8.17B | 17 | 63 | First Interstate Bank | 20.9% | 1,333 |
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.