Company Description. Wintrust Mortgage, part of Wintrust Financial Corporation, has been helping individuals achieve home ownership since 1981. As one of the largest mortgage bankers in the country, Wintrust Mortgage offers a wide range of mortgage products, including Conventional, FHA/VA programs, and Jumbo Loans. With the ability to lend in all 50 states, the company stands out as a full-service, nationally-chartered lender with offices across ...