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American Express Company (Amex) is an American bank holding company and multinational financial services corporation that specializes in payment cards. It is headquartered at 200 Vesey Street, also known as American Express Tower, in the Battery Park City neighborhood of Lower Manhattan; in 2026, the company announced that it would develop and be the sole occupant of the new 2 World Trade Center skyscraper in the nearby World Trade Center complex. Founded in 1850 as a freight forwarding company, Amex introduced financial and travel services during the early 1900s. It developed its first paper charge card in 1958, gold card in 1966, green card in 1969, platinum card in 1984, and Centurion Card in 1999. The "Don't Leave Home Without It" advertising campaign was introduced in 1975 and renewed in 2005. In the 1980s, Amex acquired and then divested a stake in Shearson. In the 1990s, it stopped reducing interchange fees for merchants who exclusively accepted Amex cards and expanded market share through targeted marketing campaigns. Amex converted to a bank holding company during the 2008 financial crisis. Amex began operating airport lounges in 2013, offering access to certain cardholders.