| # | Institution | Type | Branches | Deposits | Share |
|---|---|---|---|---|---|
| 1 | CoVantage Credit Union | Credit union | 2 | $292.8M* | 28.47% |
| 2 | Associated Bank, National Association | Bank | 2 | $186.4M | 18.13% |
| 3 | Bonduel State Bank | Bank | 1 | $113.1M | 11.00% |
| 4 | BMO Bank National Association | Bank | 1 | $104.3M | 10.14% |
| 5 | Capital Credit Union | Credit union | 1 | $94.9M* | 9.23% |
| 6 | Premier Community Bank | Bank | 2 | $93.6M | 9.10% |
| 7 | AbbyBank | Bank | 2 | $49.6M | 4.83% |
| 8 | Bank First, N.A. | Bank | 1 | $35.1M | 3.42% |
| 9 | Bank of Sun Prairie | Bank | 2 | $33.1M | 3.22% |
| 10 | First National Bank in Tigerton | Bank | 2 | $25.3M | 2.46% |
* Credit-union deposits are estimated (June total shares spread evenly across branches).
| Year | Deposits | Institutions | Branches | Leader | Top share | HHI |
|---|---|---|---|---|---|---|
| 2026 | $1.03B | 10 | 16 | CoVantage Credit Union | 28.5% | 1,583 |
| 2025 | $1.02B | 10 | 16 | CoVantage Credit Union | 27.3% | 1,485 |
| 2024 | $1.01B | 10 | 16 | CoVantage Credit Union | 29.2% | 1,563 |
| 2023 | $1.10B | 10 | 17 | CoVantage Credit Union | 36.9% | 1,922 |
| 2022 | $1.17B | 10 | 17 | CoVantage Credit Union | 37.5% | 1,972 |
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.