American Express Company, sometimes known as AmEx, is a diversified global financial services company headquartered in New York City. Founded in 1850, it is one of the 30 components of the Dow Jones Industrial Average. The company is best known for its credit card, charge card, and traveler's cheque businesses. Amex cards account for approximately 24% of the total dollar volume of credit card transactions in the US, the highest of any card issuer.
BusinessWeek and Interbrand ranked American Express as the 22nd most valuable brand in the world, estimating the brand to be worth US$14.97 billion. Fortune listed Amex as one of the top 20 Most Admired Companies in the World.