Cardholders between their 20s and 40s make up 75% of Amex's new accounts acquired on its two premium cards, Platinum and Gold.

American Express teased updates coming later this year to its travel-focused Platinum credit cards, announcing what it called its “largest investment ever” in a credit-card refresh. “We’re going to take these cards to a new level,

American Express on Monday announced "major updates" are coming "later this year" to the U.S. Consumer and Business versions of its popular Platinum cards, which have annual fees of $695.