CIB Marine Bancshares, Inc. operates as the bank holding company for CIBM Bank that provides commercial banking services to individual and business customers in Illinois, Indiana, and Wisconsin. It accepts demand, savings, and time deposits. The company also offers a range of loan products, such as commercial, commercial real estate, commercial and residential construction, government guaranteed, one-to-four family residential real estate, home equity, and consumer loans, as well as commercial and standby letters of credit.