More than half—41—are self-made billionaires. Of the 41 self-made under 40, all are men except Kylie Jenner, founder of Kylie Cosmetics, who makes her debut this year as the youngest self-made billionaire ever. Jenner displaces John Collison, 28, as the youngest self-made billionaire. Zhan, age 40, just misses the under-40 cut but is a new member of the billionaires list. In all, the 71 youngest billionaires in the world are worth a collective $299 billion, up from $265 billion last year when we found 63 under 40.

Source: Forbes March 05, 2019 16:52 UTC