Wells Fargo & Company is an American multinational financial services company. The company operates in 35 countries and serves more than 70 million customers worldwide. It is a systemically important financial institution according to the Financial Stability Board, and is considered one of the Big Four banks in the United States, alongside JPMorgan Chase, Bank of America, and Citigroup. The company's primary subsidiary is Wells Fargo Bank, N.A., a national bank that designates its Sioux Falls, South Dakota, site as its main office. It is the fourth-largest bank in the United States by total assets and is also one of the largest as ranked by bank deposits and market capitalization. It has 8,050 branches and 13,000 automated teller machines and 2,000 stand-alone mortgage branches. It is the second-largest retail mortgage originator in the United States, originating one out of every four home loans, and services $1.8 trillion in home mortgages, one of the largest servicing portfolios in the U.S. It is one of the most valuable bank brands. Wells Fargo is ranked 47th on the Fortune 500 list of the largest companies in the U.S.