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. The company provides deposit accounts comprising checking, savings, and time deposits. It 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. In addition, the company provides trust services; cash management; repurchase agreements; and other banking services. Further, it invests in securities. The company was formerly known as Central Illinois Bancorp, Inc. and changed its name to CIB Marine Bancshares, Inc. in August 1999. CIB Marine Bancshares, Inc. was incorporated in 1985 and is based in Brookfield, Wisconsin.