Bank of Sun Prairie
Sun Prairie, WI
IDRSSD: 124344
Total Assets
$726.48M
Latest filing
Total Deposits
$608.29M
Latest filing
Net Interest Margin
2.75%
Profitability
Key People
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Locations
Main office and branches. Select to view on the map.
Main Office
Bank of Sun Prairie
228 E Main St
Sun Prairie, WI 53590
Full Service - Brick and Mortar
Updated 01/30/2026Established 08/08/1903FDIC Certificate 8481
Branches (3)
Page 1 of 1| Name | Address | City / State |
|---|---|---|
| Bank of Sun Prairie (Main) | 228 E Main St | Sun Prairie, WI |
| COTTAGE GROVE BRANCH | 419 W Cottage Grove Rd | Cottage Grove, WI |
| GRAND AVENUE OFFICE BRANCH | 695 S Grand Ave | Sun Prairie, WI |
| SUN PRAIRIE WEST HIGH SCHOOL BRANCH | 2850 Ironwood Dr | Sun Prairie, WI |
Showing 3 of 3
Quarterly Trends
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Total Assets vs Total Liabilities
Loans & Leases vs Deposits
Interest Income vs Expense
Net Interest Income
Noninterest Expense vs Income
Net Income
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Institution Profile
| Institution Class | Commercial bank, state charter, Fed non-member, and supervised by the FDIC |
| Primary Regulator | FDIC |
| Established Date | 08/08/1903 |
| Community Bank | Yes |
| Ownership Type | Not Mutual |
| ZIP | 53590 |
| State and County Number | 55025 |
| Subchapter S Corporations | No |
| Trust Powers | Full Trust Powers Granted |
| Federal Reserve ID Number | 07 |
| Numeric code | 21 |
| Insured by FDIC | Institutions that are currently open and insured by the FDIC |
| Federal Reserve District | Chicago |
| Core Based Statistical Area Name | Madison, WI |
Operational Info
| Number of Employees | 94 |
| Domestic Offices | 4 |
| Foreign Offices | 0 |
| US Offices | 0 |
| Directly owned by another bank (CERT) | No |
| Last Structure Change Effective Date | 08/31/2022 |
| Date of Deposit Insurance | 01/06/1934 |
| Primary Insurance Agency | DIF |
| Website | http://www.bankofsunprairie.com |
| Data Updated | 01/30/2026 |
| CERT | 13565 |
| Office of The Comptroller District: | — |
| Office of Thrift Supervision Region | N/A |
Financial Summary
| Total Assets | $726.48M |
| Total Deposits | $608.29M |
| Total Liabilities | $660.12M |
| Total Equity Capital | $66.36M |
| Net Income | $1.17M |
| Net Loans and Leases | $580.10M |
| Assets Per Employee ($Millions) | $7.98M |
| Bank Premises and Fixed Assets | $5.93M |
| Cash and Balances due from Depository Institutions | $32.00M |
| Deposits Held in Domestic Offices | $608.29M |
Key Performance Ratios
| Return on Assets (ROA) | 0.64% |
| Return on Equity (ROE) | 6.75% |
| Net Interest Margin | 2.75% |
| Efficiency Ratio | 74.29% |
| Tier 1 Risk-Based Capital Ratio | 11.751% |
| Net Loans and Leases to Core Deposits | 0% |
| Credit Loss Provision to Assets | 0% |
| Cash Dividends to Net Income (YTD Only) | 0% |
| Equity Capital to Assets | 9.134% |
| Earning Assets to total Assets | 94.91% |
Income and Expense
| Total Interest Income | $8.91M |
| Total Noninterest Income | $671.00k |
| Total Interest Expense | $4.15M |
| Total Noninterest Expense | $4.04M |
| Net Interest Income | $4.76M |
| Pre-tax Net Operating Income | $1.39M |
| Provision for Credit Losses | $0 |
| Discontinued Operations (Extraordinary Gains - Net) | $0 |
Additional Financial Info
| Goodwill and Other Intangibles | $0 |
| All Other Assets | — |
| Other Real Estate Owned | $0 |
| Other borrowed funds | $45.00M |
| Federal Funds Sold & Reverse Repurchase Agreement | $16.00k |
| Federal Funds Purchased and Repurchased Agreement | $0 |
| All Other Liabilities | $6.83M |
| Total Liabilities and Capital | $726.48M |
Securities
| Securities | $83.30M |
| Available-for-sale debt securities | $79.15M |
| Equity securities with readily determinable fair values not held for trading | — |
| Held-to-maturity securities | $3.49M |
| Subordinated Debt | $0 |
| Trading Account Assets | $0 |
| Trading Liabilities | $0 |
Frequently Asked Questions
What are the total assets of Bank of Sun Prairie?
$726.48M as of the latest filing.
How much are Bank of Sun Prairie's total deposits?
$608.29M in total deposits.
Where is Bank of Sun Prairie located?
Sun Prairie, WI.
What is the Net Interest Margin?
2.75%.
How many domestic offices does it operate?
4.
When was it established?
08/08/1903.
What is the Return on Assets (ROA)?
0.64%.
How much are total loans and leases?
$580.10M (latest filing).
What is the total interest income (latest filing)?
$8.91M.