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In

January 2012, Forbes launched the inaugural 30 Under 30 list to highlight the founders and leaders building the next big thing. Every year since, the iconic franchise has celebrated the top young talent in 20 different industries who are shaping the future of business and culture.

Countless listers have since gone on to achieve stunning success in business, science, technology and show biz. But just 46 alumni have been so successful that they have leapt into the rarified ranks of the World’s Billionaires. Over the last 15 years the brightest of these young global stars have made their 10-figure fortunes in everything from social media and fintech to retail and, in Taylor Swift’s case, worldwide stardom. But nothing has created as much wealth at such an unprecedented rate as today’s AI fervor, which has minted new billionaires at an unprecedented rate, and is a big reason why a stunning 19 of these super-rich alums have become billionaires since the start of the year.