sentences:  In the 1990s, the team, led by John Canning, Jr. would spin out of First Chicago to form private equity firm Madison Dearborn.Midwestern private equity firm, Primus Capital was also founded by First Chicago private equity alumni.First Chicago began to expand for the first time into the northwest suburbs of Chicago with the acquisition of the Arlington Heights-based First United Financial Services, a bank holding company with five banks, in 1987.