Wintrust Financial Corporation is a financial holding company. It provides personal and commercial banking services to customers located in the Chicago and in southeastern Wisconsin through its 15 wholly owned banking subsidiaries, as well as origination and purchase of residential mortgages for sale into the secondary market through Wintrust Mortgage, a division of Barrington Bank and Trust Company, N.A. It provides specialty finance services, including financing for the payment of commercial insurance premiums and life insurance premiums. In February 2012, its wholly owned subsidiary bank, Barrington Bank & Trust Company, N.A., acquired certain assets and the banking operations of Charter National Bank and Trust. In May 2013, Wintrust Financial Corp acquired the entire share capital of First Lansing Bancorp Inc.