MB Financial is a financial holding company. Through its banking subsidiary, MB Financial Bank, N.A., Co. provides a range of financial services to small and middle market businesses and individuals. Co.'s primary market is the Chicago, IL metropolitan area. Co. operates in three reportable segments: Banking, which provides commercial banking, lease banking, retail banking, and wealth management; Leasing, which includes lease originations and related services; and Mortgage Banking, which originates and services residential mortgage loans for sale to investors and for loans owned by Co. At Dec 31 2017, Co. had total assets of $20.09 billion and total deposits of $14.96 billion.