Marathon Bancorp, Inc.
Marathon Bancorp, Inc. (Nasdaq Capital Market: MBBC) is a bank holding company headquartered in Wausau, Wisconsin, with its website at www.marathonbancorp.com. The company was formed in December 2020 and completed a mutual holding company reorganization and public offering in April 2021, followed by a conversion from… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Marathon Bancorp, Inc. does
In the company’s own words
Marathon Bancorp, Inc. (Nasdaq Capital Market: MBBC) is a bank holding company headquartered in Wausau, Wisconsin, with its website at www.marathonbancorp.com. The company was formed in December 2020 and completed a mutual holding company reorganization and public offering in April 2021, followed by a conversion from mutual to stock holding company form in April 2025.
The company operates through its wholly-owned subsidiary, Marathon Bank, a Wisconsin-chartered savings bank founded in 1902. Marathon Bank conducts business from its main office and four branch locations across Marathon, Ozaukee, and Waukesha Counties in Wisconsin, with recent expansion into Southeastern Wisconsin including the Milwaukee metropolitan area. The bank anticipates opening an additional branch in New Holstein, Wisconsin in the fourth quarter of 2026.
Marathon Bank's primary business involves taking deposits from the general public and investing those deposits in a diversified loan portfolio. As of June 30, 2026, the bank maintained total consolidated assets of $261.0 million, total deposits of $189.8 million, and total stockholders' equity of $48.0 million. The loan portfolio consists of commercial real estate loans (43.7%), multifamily real estate loans (24.6%), one- to four-family residential real estate loans (29.0%), commercial and industrial loans (1.3%), consumer loans (1.3%), and construction loans (0.1%).
The bank's strategic focus emphasizes growing its commercial real estate and multifamily lending operations in Southeastern Wisconsin while maintaining its commitment to residential mortgage lending in its core markets. The bank offers various deposit products including checking accounts, savings accounts, money market accounts, and certificates of deposit. It also provides commercial cash management services and remote deposit capture capabilities to serve business customers.
Marathon Bank sources funding through deposits and borrowings, primarily from the Federal Home Loan Bank of Chicago. The bank's market area encompasses approximately 1.6 million residents across its operating counties, with significant employment in manufacturing, healthcare, education, retail trade, and professional services sectors. The institution competes with regional and community banks, credit unions, and fintech providers in its market areas.
Company details
- Sector
- Financials
- Industry
- Banks & Brokers
- Headquarters
- WAUSAU, WI
- Fiscal year end
- June
- CIK
- 1835385
- SIC
- 6036
Financial performance, year by year
Fiscal 2021–2026 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Marathon Bancorp, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Marathon Bancorp, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Could not be determined for this company: bond issues.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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