Wells Fargo & Company is an American international banking and financial services holding company headquartered in San Francisco, California, with "hub quarters" throughout the country. It is the world's second-largest bank by market capitalization[3] and the third largest bank in the U.S. by assets. In July 2015, Wells Fargo became the world's largest bank by market capitalization, edging past ICBC, before slipping behind JP Morgan Chase in September 2016, in the wake of a scandal involving the alleged creation of over 2 million fake bank accounts by thousands of Wells Fargo employees. Wells Fargo surpassed Citigroup Inc. to become the third-largest U.S. bank by assets at the end of 2015. Wells Fargo is the second-largest bank in deposits, home mortgage servicing, and debit cards. The firm's primary U.S. operating subsidiary is national bank Wells Fargo Bank, N.A., which designates its main office as Sioux Falls, South Dakota. In 2016, Wells Fargo ranked 7th on the Forbes Magazine Global 2000 list of largest public companies in the world and ranked 27th on the Fortune 500 list of largest companies in the United States.