Marathon Bancorp Inc is a mid-tier holding company for Marathon Bank, a Wisconsin-chartered savings bank, operating as a community-oriented bank offering financial products and services. Its primary deposit products include demand deposits, savings, and certificates of deposit, while its lending products include commercial real estate, commercial and industrial, construction, one-to-four-family residential, multifamily real estate, and consumer loans. The majority of its revenue comes from interest income on loans and debt securities.