| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | First Interstate Bank | Bank | 12 | $2.14B | 23.07% |
| 2 | U.S. Bank National Association | Bank | 4 | $1.41B | 15.20% |
| 3 | Stockman Bank of Montana | Bank | 6 | $1.17B | 12.64% |
| 4 | Wells Fargo Bank, National Association | Bank | 4 | $996.1M | 10.76% |
| 5 | Glacier Bank | Bank | 7 | $884.7M | 9.56% |
| 6 | The Yellowstone Bank | Bank | 7 | $819.8M | 8.85% |
| 7 | Altana Federal Credit Union | Credit union | 7 | $338.6M* | 3.66% |
| 8 | Valley Financial Credit Union | Credit union | 8 | $309.3M* | 3.34% |
| 9 | Black Hills Federal Credit Union | Credit union | 2 | $201.1M* | 2.17% |
| 10 | Mountain America Federal Credit Union | Credit union | 1 | $180.8M* | 1.95% |
| 11 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 | $9.26B | 21 | 80 | First Interstate Bank | 23.1% | 1,252 |
| 2024 | $8.58B | 21 | 81 | First Interstate Bank | 21.3% | 1,249 |
| 2023 | $8.40B | 20 | 77 | First Interstate Bank | 21.5% | 1,241 |
| 2022 | $8.94B | 18 | 74 | First Interstate Bank | 21.2% | 1,259 |
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.