CIB Marine Bancshares, Inc. is a bank holding company with its principal executive offices in Waukesha, Wisconsin, a suburb of Milwaukee.
CIB Marine Bancshares, Inc. was originally incorporated in the State of Illinois in 1985 as Sidney Bancorporation, Inc., a one-bank holding company headquartered in Sidney, Illinois. In September 1987, a group of investors acquired Sidney Bancorporation and subsequently changed its name to Central Illinois Bancorp, Inc. On August 27, 1999, Central Illinois Bancorp reincorporated as a Wisconsin corporation and changed its name to CIB Marine Bancshares, Inc.