American Express, also referred to as Amex, is a US multinational corporation with its headquarters located in New York City. The company is best known for providing credit cards, which accounted for 22.9% of all 2017 credit card transactions in the US based on total dollar value. American Express employs roughly 55,000 employees providing a wide range of diverse jobs. In 2017, Forbes named American Express as the 23rd most valuable brand in the world, estimating its worth to be $24.5 billion. In 2018, Fortune also ranked the company 14th most admired worldwide, and the 23rd best company to work for.