| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | GreenState Credit Union | Credit union | 1 | $250.2M* | 31.09% |
| 2 | First State Bank | Bank | 3 | $138.6M | 17.22% |
| 3 | Grinnell State Bank | Bank | 1 | $134.9M | 16.76% |
| 4 | Lincoln Savings Bank | Bank | 1 | $80.5M | 10.00% |
| 5 | Wells Fargo Bank, National Association | Bank | 1 | $65.8M | 8.18% |
| 6 | First Interstate Bank | Bank | 1 | $49.4M | 6.13% |
| 7 | Montezuma State Bank | Bank | 1 | $46.4M | 5.76% |
| 8 | Community 1St Credit Union | Credit union | 1 | $39.0M* | 4.84% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2025 | $804.8M | 8 | 10 | GreenState Credit Union | 31.1% | 1,805 |
| 2024 | $808.3M | 9 | 10 | GreenState Credit Union | 31.7% | 1,724 |
| 2023 | $844.1M | 9 | 10 | GreenState Credit Union | 29.9% | 1,680 |
| 2022 | $857.8M | 9 | 10 | GreenState Credit Union | 33.2% | 1,816 |
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.