United StatesCitibankWhile Citi is the fourth largest retail bank in the US, its reach extends to all major markets around the world. It operates in more than 100 cities globally and makes $9.8bn in pre-tax earnings each year. Citi's Global Consumer Bank now serves more than 100 million customers worldwide and is present in the fastest-growing cities in nearly 25 countries worldwide.

• www.citigroup.com