MB Financial, Inc. operates as a bank holding company for MB Financial Bank, N.A. that provides financial services to small and middle market businesses, and individuals in the United States. Its Banking segment offers commercial banking products, including working capital loans and lines of credit; accounts receivable financing; inventory and equipment financing; industrial revenue bond financing; business acquisition loans; owner occupied real estate loans; asset-based loans; and financial, performance, and commercial letters of credit. Its commercial banking products also comprise deposit and treasury management products, such as Internet banking products, investment sweep and zero balance accounts, automated tax payments, ATM access, telephone banking, lockbox, automated clearing house transactions, account reconciliation, controlled disbursement, information reporting, wire transfers, vault services, remote deposit capture, and checking accounts; capital markets and international banking services; and credit, deposit, and treasury management services for real estate operators and investors. In addition, this segment offers loans to equipment lessors; retail banking services, including personal banking, business banking, and cards services; and wealth management solutions. The company’s Leasing segment provides lease originations and related services. This segment’s lease portfolio consists of computer systems, satellite equipment, and medical equipment, as well as general manufacturing, industrial, construction, and transportation equipment. Its Mortgage Banking segment originates and services residential mortgage loans for sale to investors and for the company's portfolio. The company offers its products and services through approximately 86 banking offices in the Chicago metropolitan area and 1 banking office in Philadelphia, Pennsylvania, as well as has approximately 132 ATMs. MB Financial, Inc. was founded in 1911 and is headquartered in Chicago, Illinois.