Wintrust Financial Corporation is a bank holding company which provides banking services, trust and investment services, commercial insurance premium financing, short-term accounts receivable financing, and certain administrative services. They provide community-oriented, personal and commercial banking services through their subsidiaries, Lake Forest Bank & Trust Company, Hinsdale Bank & Trust Company, North Shore Community Bank & Trust Company, Libertyville Bank & Trust Company, Barrington Bank & Trust Company, Crystal Lake Bank & Trust Company, and Northbrook Bank & Trust Company.