Wells Fargo is one of the world's giants of banking — the 12th largest private employer in the world, with a stock-market value exceeding $130,000,000,000. Whether you are buying your first home, managing properties or seeking guidance in refinancing, Wells Fargo is a sure bet. Its Back Bay offices are located in the beautiful Bostonian landmark of 121 Mount Vernon Street. Business is done by appointment only and the company is not listed on the directory in the building — so make sure to call ahead.