The net worth of Jeff Bezos, founder and CEO of Amazon, increased to $172 billion after shares of the Seattle-based retailer surged 4% to a record $2,879. That tops his previous high of $168 billion, set on September 4, 2018. This even after he relinquished a quarter of his stake in Amazon as part of a divorce settlement last year. Mackenzie Bezos, who acquired a 4% stake in Amazon after the couple split, has a net worth of $57 billion and climbed to No. 12 in Bloomberg’s ranking. She recently leapfrogged Alice Walton and Julia Flesher Koch to become the world’s second-wealthiest woman, and trails only L’Oreal heiress Francoise Bettencourt Meyers.