It is the primary subsidiary of Byline Bancorp, Inc., a bank holding company.

As of 31 December 2019[update], it operated 57 branches, 56 of which were in the Chicago metropolitan area.

[2] The family grew the bank from a single location to more than 90 branches in the Chicago metropolitan area before suffering in the 2007–2008 financial crisis.

[2][4][5] In 2013, BXM Holdings LLC, led by Roberto Herencia, purchased and recapitalized the bank with a $207 million investment.

[12] In April 2019, the company acquired Oak Park River Forest Bank shares for $40.0 million in cash and stock.