Bank of Sun Prairie

What Bank of Sun Prairie does

Bank of Sun Prairie is a Wisconsin-chartered community bank founded in 1897 and headquartered at 228 E. Main St., Sun Prairie, Wisconsin. Following the May 2026 merger with Banner Banks (now operating as Bank of Wisconsin, a branch of Bank of Sun Prairie), the combined institution holds $848 million in assets and operates eight branches across six Wisconsin communities, spanning Sun Prairie, Cottage Grove, and four north-central Wisconsin locations. The bank serves individual consumers, small to mid-size businesses, nonprofits, agricultural operators, students, and seniors through a full-service retail and commercial banking platform.

The institution offers a comprehensive product suite spanning personal and business checking, savings, money market accounts, CDs, HSAs, IRAs, Visa credit and debit cards, mortgages and home equity products, auto/boat/RV loans, SBA and USDA loans, commercial real estate and C&I lending, merchant services, wealth management, and trust and estate planning. The technology stack is conventional community-bank digital infrastructure: a mobile app for iOS/Android, browser-based online banking, Zelle person-to-person payments, ACH origination, Positive Pay, debit card controls, and support for Apple Pay, Samsung Pay, Google Pay, Garmin Pay, and Amazon One. Product breadth beyond core deposits and lending is delivered through channel partnerships, notably Elan Financial Services for Visa cards, Sallie Mae for student loans, Evolv for merchant services, CDARS/ICS for cash sweeps, and Sun Prairie Financial Services for investments.

Revenue is generated through net interest income on the loan portfolio (mortgages, commercial real estate, C&I, consumer, SBA, and agricultural loans), deposit account and transaction fees, interchange on Visa cards, and referral-based income from student loan and investment product partners. Go-to-market is direct-to-consumer and direct-to-business through physical branches and digital channels, with marketing centered on community education (Financial Fitness Center, school partnership, in-person workshops) rather than broad digital advertising. The bank is privately held and locally owned, led by President and CEO Jimmy Kauffman.

Name

Bank of Sun Prairie

Legal name

Bank of Sun Prairie

Website

https://bankofsunprairie.com

Company type

Private

Founded year

1897

Operating status

Operating

Headcount range

101–250 employees

Short description

Wisconsin-chartered community bank founded in 1897 offering personal, business, agricultural, mortgage, and wealth services across eight branches in six Wisconsin communities following its 2026 merger with Banner Banks, holding $848 million in combined assets.

Ownership category

akta.pro rank

Product category

Community Banking

NAICS

Commercial Banking (52211)

SIC

State Commercial Banks (6022)

akta.pro primary industry

SME Deposits & Business Accounts (Operating, Savings, CDs) (FSABABAC)

Keywords

• Community banking services
• Retail banking products
• Commercial lending solutions
• Consumer loan products
• Wealth management services

Headquarters

HQ city

Sun Prairie

HQ country

United States

HQ region

North America

Offices8 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Interest Income: Primary revenue stream from interest earned on loans including mortgages, commercial real estate loans, C&I loans, consumer loans (auto, boat, RV), personal loans, home equity loans, and SBA loans. Interest rate spreads between lending and deposit rates.
2. Deposit Account Fees: Monthly service charges, overdraft fees, wire transfer fees, safe deposit box rental, and other account-related service fees.
3. Credit Card Interchange: Transaction fees from Visa credit cards issued through Elan Financial Services partnership.
4. Student Loan Referrals: Referral compensation from Sallie Mae for student loan products originated through the bank.
5. Investment Product Referrals: Revenue from investment and insurance products through Sun Prairie Financial Services referrals including stocks, bonds, mutual funds, life insurance, and long-term care insurance.

Pricing tiers

Go-to-market motion1 record

Distribution channels7 records

Marketing channels6 records

Core offering

Bank of Sun Prairie is a Wisconsin community bank providing personal and business banking products including checking, savings, money market, and CDs, plus credit cards, debit cards, mortgages, home equity, auto/boat/RV loans, commercial real estate loans, C&I loans, SBA loans, wealth management, and trust services. Distribution is delivered through eight physical branches, a mobile app, online banking, and partner channels for specialized products such as Visa cards, student loans, and merchant services.

Product overview

Bank of Sun Prairie is a community bank offering a comprehensive suite of financial products and services through both a unified banking platform and multiple specialized modules. The core offerings include personal and business checking and savings accounts (checking, savings, money market, CDs, HSAs, IRAs), credit products (Visa credit cards, debit cards, mortgages, home equity loans/lines of credit, car loans, boat/RV loans, student loans, commercial real estate loans, C&I loans, SBA loans), and cash management services (Positive Pay, ACH transfers, wire transfers, merchant services, Express Deposits, Cash Sweeps via CDARS/ICS). Digital banking capabilities span online banking, mobile banking with card controls, account-to-account transfers via TransferNow, Zelle person-to-person payments, and digital wallet integrations (Apple Pay, Samsung Pay, Google Pay, Garmin Pay, Amazon One). Additional services include wealth management and trust administration, financial education through the Financial Fitness Center, and private banking concierge services. The May 2026 merger with Banner Banks (rebranded as Bank of Wisconsin) expanded operations to eight branches with $848 million in combined assets.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Over 125 years of continuous banking service since 1897
• +3 more outcomes

Segments8 records

Ideal customer profiles6 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration16 records

Feature6 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Banner Banks (now Bank of Wisconsin)coreStrategic or Co-development Partner · 1 May 2026In May 2026, Banner Banks merged with Bank of Sun Prairie and now operates as Bank of Wisconsin, a branch of Bank of Sun Prairie. Both banks were chartered in 1903. Combined entity has $848 million in assets with eight branches across six Wisconsin communities. Expanded footprint to north-central Wisconsin.
• Evolv (Preferred Merchant Service Partner)coreTechnology or IntegrationBank of Sun Prairie partnered with Evolv as Preferred Merchant Service Partner to offer wholesale pricing on payment solutions technology and compliance support. Evolv provides mobile payment solutions, electronic check conversion with guarantee, gift and loyalty programs, eCommerce development, PCI compliance assistance, and digital marketing solutions.
• WisTAF (Interest on Lawyers' Trust Accounts)minorStrategic or Co-development PartnerBank of Sun Prairie is a Prime Partner in WisTAF's IOLTA program, ensuring Wisconsin residents may access legal advice or representation when needed.
• Sallie MaecoreChannel Partner/ Reseller/ DistributorStudent loans offered through Bank of Sun Prairie in partnership with Sallie Mae for undergraduate, graduate, and career training students. Products include Smart Option Student Loan and graduate PLUS loans with competitive rates and multiple repayment options. Bank receives referral compensation for loan customers.
• Elan Financial ServicescoreTechnology or IntegrationVisa credit cards issued through Elan Financial Services for personal and business accounts. Elan provides zero fraud liability, mobile payment capability, online expense reporting tools, 24/7 cardmember service, and no fee for additional employee cards.
• CDARS (Certificate of Deposit Account Registry Service)coreTechnology or IntegrationCDARS uses a network of banks to provide full FDIC insurance coverage on deposits while earning CD-level returns. Allows customers to deposit amounts over $250,000 while maintaining full coverage.
• ICS (Insured Cash Sweep)coreTechnology or IntegrationICS enables customers to secure large deposits while maintaining access to funds and earning interest on demand deposit accounts and/or money market accounts. Provides FDIC insurance coverage for amounts over $250,000.
• Sun Prairie Financial ServicescoreStrategic or Co-development PartnerInvestment and financial planning services located in Bank of Sun Prairie's Wealth Management offices. Offers stocks, bonds, mutual funds, investment advisory accounts, brokerage services, life insurance, long-term care insurance, Medicare supplements, and wealth transfer/charitable gifting strategies.
• DeluxeminorChannel Partner/ Reseller/ DistributorCheck ordering partner providing customers access to order checks through Deluxe website. Variety of designs and check types including special Bank of Sun Prairie logo-watermarked check design.
• Sun Prairie Area School DistrictcoreStrategic or Co-development PartnerBank of Sun Prairie designated as Official Financial Institution of Sun Prairie Area School District. First school branch opened at Sun Prairie West High School in 2022 as Financial Literacy Outlet. Relationship banker serves as Financial Education Partner at the school.

Scale indicators6 records

Recent moves11 records

Expansion highlights6 records

Direct peers

• PyraMax Bank: Wisconsin-based community bank with similar mid-market commercial and consumer banking focus. Comparable in scale, local-decision-making model, and Wisconsin geographic concentration.
• Commerce State Bank: Wisconsin community bank (West Bend-based) offering commercial and consumer banking products including SBA loans, mortgages, and treasury management. Closely matches Bank of Sun Prairie's SME lending orientation and community-bank scale.
• Waukesha State Bank: Wisconsin-based, family/community-owned commercial bank of comparable asset size offering personal, business, and mortgage banking across southeastern Wisconsin. Most directly comparable to Bank of Sun Prairie on footprint, ownership structure, and product mix.
• Investors Community Bank: Wisconsin community bank specializing in commercial, agricultural, and small-business lending with personal banking. Direct comparable on the ag-lending + community-bank positioning that distinguishes Bank of Sun Prairie.

Broad incumbents

• Associated Bancorp: Wisconsin's largest community-oriented bank holding company with statewide branch coverage. Competes with Bank of Sun Prairie for commercial, mortgage, and wealth-management customers but at much greater scale (>$40B assets).
• BMO Harris Bank: Major national bank with deep Wisconsin retail and commercial banking presence. Competes directly for deposits, mortgages, and small-business relationships across Bank of Sun Prairie's footprint, albeit with much larger scale and product breadth.
• First Business Financial Services: Wisconsin-based commercial banking specialist serving SMB and middle-market clients with treasury management and SBA lending. A natural competitor for Bank of Sun Prairie's commercial and SBA book, with broader specialty lending capabilities.
• Nicolet National Bank: Wisconsin-headquartered community-oriented bank that has grown substantially through M&A, offering a similar full suite of business, personal, and wealth products across Wisconsin and the Upper Midwest. Larger scale but the most natural 'graduation path' competitor for Bank of Sun Prairie's SME and commercial customers.
• Johnson Financial Group: Wisconsin-headquartered privately held banking and wealth-management firm with similar community-bank DNA but larger scale (~$14B AUM). Competes for Bank of Sun Prairie's high-net-worth and commercial banking clients.

Regional players

• Fox Communities Credit Union: Large Wisconsin-based credit union (cooperative) operating across much of the same geography as Bank of Sun Prairie. While structurally different (cooperative vs. stock bank), it competes for the same consumer deposit, mortgage, and auto-loan customers in eastern Wisconsin.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/banksunprairie
• YouTubeyoutube.com/channel/UCro_96bddqHmhbOs9mjBweQ
• Facebookfacebook.com/bankofsunprairie
• LinkedInlinkedin.com/company/bank-of-sun-prairie
• Instagraminstagram.com/bankofsunprairie

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles26 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bank of Sun Prairie