Bank of Sun Prairie is a state-chartered bank headquartered in Sun Prairie, Wisconsin, in business for about 123 years. At the end of Q2 2026 it reported $841.2M in total assets and $719.5M in deposits, with 8 offices.
Based on its Q2 2026 filing, Bank of Sun Prairie scores 68/100, which we describe as moderate. That is higher than only 37% of 2,650 banks with $100 million – $1 billion. Among 154 banks headquartered in Wisconsin, it ranks 100th. Its strongest component is problem-loan coverage (99/100; 0.5%), and its lowest is earnings (45/100; 0.63%).
TellerScore · Q2 2026
Scorecard
The TellerScore is our own summary of the figures this institution reports publicly; it is not issued or endorsed by any government agency. It is not a prediction, and deposits within insurance limits are protected either way.
9 quarters
Health trend
From Q2 2025 to Q2 2026, the score rose 2 points (66 → 68), mostly because the funding & liquidity component improved by 13 points.
Show as table
| Quarter | TellerScore |
|---|---|
| Q2 2024 | 63 |
| Q3 2024 | 64 |
| Q4 2024 | 64 |
| Q1 2025 | 64 |
| Q2 2025 | 66 |
| Q3 2025 | 66 |
| Q4 2025 | 63 |
| Q1 2026 | 62 |
| Q2 2026 | 68 |
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| Quarter | Tier 1 leverage ratio |
|---|---|
| Q2 2024 | 10.21% |
| Q3 2024 | 10.00% |
| Q4 2024 | 9.94% |
| Q1 2025 | 10.06% |
| Q2 2025 | 10.35% |
| Q3 2025 | 10.52% |
| Q4 2025 | 9.39% |
| Q1 2026 | 9.35% |
| Q2 2026 | 9.99% |
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| Quarter | Noncurrent loans |
|---|---|
| Q2 2024 | 0.00% |
| Q3 2024 | 0.00% |
| Q4 2024 | 0.00% |
| Q1 2025 | 0.05% |
| Q2 2025 | 0.00% |
| Q3 2025 | 0.00% |
| Q4 2025 | 0.05% |
| Q1 2026 | 0.05% |
| Q2 2026 | 0.07% |
Show as table
| Quarter | Return on assets |
|---|---|
| Q2 2024 | 0.32% |
| Q3 2024 | 0.27% |
| Q4 2024 | 0.30% |
| Q1 2025 | 0.27% |
| Q2 2025 | 0.36% |
| Q3 2025 | 0.44% |
| Q4 2025 | 0.49% |
| Q1 2026 | 0.43% |
| Q2 2026 | 0.63% |
| Quarter | Score | Assets | Capital | Problem loans | ROA | Loans/deposits |
|---|---|---|---|---|---|---|
| Q2 2026 | 68 | $841.2M | 9.99% | 0.07% | 0.63% | 82.6% |
| Q1 2026 | 62 | $716.6M | 9.35% | 0.05% | 0.43% | 99.2% |
| Q4 2025 | 63 | $726.5M | 9.39% | 0.05% | 0.49% | 95.4% |
| Q3 2025 | 66 | $728.6M | 10.52% | 0.00% | 0.44% | 100.1% |
| Q2 2025 | 66 | $722.5M | 10.35% | 0.00% | 0.36% | 98.1% |
| Q1 2025 | 64 | $733.0M | 10.06% | 0.05% | 0.27% | 96.9% |
| Q4 2024 | 64 | $742.0M | 9.94% | 0.00% | 0.30% | 94.4% |
| Q3 2024 | 64 | $768.7M | 10.00% | 0.00% | 0.27% | 99.1% |
| Q2 2024 | 63 | $748.4M | 10.21% | 0.00% | 0.32% | 109.3% |
2,650 peers · $100 million – $1 billion
How it compares with peers
Percentile against banks of similar size nationwide (100th = best among peers; for ratios where lower is better, the scale is flipped).
Similar-size banks in Wisconsin
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| DMB Community BankBank Madison, WI | 69 out of 100, Moderate | $835.0M | 11.0% | 0.00% | vs |
| The Bank of New GlarusBank New Glarus, WI | 56 out of 100, Moderate | $823.2M | 9.5% | 1.99% | vs |
| Royal BankBank Elroy, WI | 79 out of 100, Strong | $816.1M | 10.5% | 0.06% | vs |
| Farmers and Merchants Union BankBank Columbus, WI | 78 out of 100, Strong | $872.1M | 10.0% | 0.15% | vs |
| Hiawatha National BankBank Hager City, WI | 41 out of 100, Below average | $781.3M | 10.8% | 5.32% | vs |
| Westbury BankBank Waukesha, WI | 70 out of 100, Strong | $771.9M | 9.2% | 0.00% | vs |
Deposit insurance
Is my money safe at Bank of Sun Prairie?
Yes. Bank of Sun Prairie is an FDIC-insured institution (FDIC certificate #13565). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
An estimated 27.4% of deposits ($197.0M) are above the $250,000 FDIC insurance limit, above the peer median of 24%. Insured balances are protected regardless of the score.
The tier 1 leverage ratio is 9.99%, above the 5% level regulators use as the "well capitalized" benchmark for this measure. Its total risk-based capital ratio is 14.52% (benchmark: 10%).
8 locations
Branches
Bank of Sun Prairie lists 7 offices in 6 cities. Most locations:
- Sun Prairie, WI (2)
- Antigo, WI (1)
- Birnamwood, WI (1)
- Cottage Grove, WI (1)
- Hatley, WI (1)
- Wittenberg, WI (1)
HMDA 2025
Mortgage lending
In 2025, Bank of Sun Prairie reported 214 home-loan applications under HMDA (LEI 6354007NTMKKVRFIIP73): 153 originated ($50,285,000 total), 23 denied, and 23 withdrawn or closed by the applicant. Its denial rate on decided applications was 12.0%, compared with 22.2% for all lenders nationwide.
Denial rates depend heavily on loan type and applicant mix and are not a measure of fairness or of your own odds.
Identity & history
Profile
- Legal name
- Bank of Sun Prairie
- Type
- State-chartered bank
- FDIC certificate #
- 13565
- RSSD ID
- 124344
- Primary regulator
- FDIC
- Holding company
- Bosp Bancshares Inc
- Established
- August 8, 1903
- Headquarters
- 228 E Main St, Sun Prairie, WI 53590
- Website
- www.bankofsunprairie.com
- Employees
- 113
Quick answers
Bank of Sun Prairie: common questions
Is Bank of Sun Prairie FDIC insured?
Yes. Bank of Sun Prairie is an FDIC-insured institution (FDIC certificate #13565). Deposits are insured up to $250,000 per depositor, per insured bank, for each account ownership category.
What is Bank of Sun Prairie's TellerScore?
68 out of 100 (Moderate), based on its Q2 2026 publicly reported figures. The TellerScore is our own summary and is not issued by any government agency.
Has Bank of Sun Prairie ever failed?
There is no failure record for FDIC certificate #13565 in the FDIC failed bank list.
How many branches does Bank of Sun Prairie have?
8 offices as of the latest FDIC data.
Nearby
Highest-scoring banks and credit unions with branches near Sun Prairie
| Institution | Score | Assets | Capital | Problem loans | Compare |
|---|---|---|---|---|---|
| Mississippi Public Employees Federal Credit UnionCredit union Jackson, MS | 97 out of 100, Very strong | $29.2M | 18.1% | 0.10% | vs |
| Madison Fire Department Credit UnionCredit union Madison, WI | 90 out of 100, Very strong | $5.5M | 19.9% | 0.00% | vs |
| National Exchange Bank and TrustBank Fond Du Lac, WI | 88 out of 100, Very strong | $2.9B | 20.1% | 0.37% | vs |
| Badger BankBank Fort Atkinson, WI | 82 out of 100, Strong | $206.0M | 12.4% | 0.07% | vs |
| John Deere Financial, f.s.b.Bank Middleton, WI | 82 out of 100, Strong | $4.9B | 19.4% | 0.27% | vs |
| Great Midwest Bank, S.S.B.Bank Brookfield, WI | 80 out of 100, Strong | $1.1B | 16.5% | 0.56% | vs |