The youngest member of this list is Snapchat founder Evan Spiegel, who at just 26-years-old edges out his 28-year-old co-founder Bobby Murphy for that spot. They are the only two billionaires this year that are under 30 years old. The richest person on the under 40 list is 32-year-old Facebook founder Mark Zuckerberg, of course. Zuckerberg has made this list since 2008 when he was the youngest member of the under 40 rich kids club. The 14 youngest billionaires represent just 3.5% of the 400 wealthiest Americans. Nine of them come from tech startups. There are three less billionaires under 40 this year than last year because Uber’s Travis Kalanick and Whatsapp’s Jan Koum both crossed the threshold of 40 and Twitter/Square’s Jack Dorsey and Thernos’ Elizabeth Holmes are no longer billionaires. Dorsey may see his valuation rise, but unfortunately, he turns 40 in November, so will be too old for the next list. The only newcomer to the list is Walmart heir Lukas Walton. Lukas inherited a third of his father’s estate when John Walton died in 2005, and the value of that was just recently revealed, putting him on the list of wealthiest Americans. There are no women on this year’s list of the wealthiest Americans under 40. Together, these young billionaires are worth a combined $113.7 billion. #14. Alejandro Santo Domingo Net Worth: $14.2 billion Age: 39 Source: inherited and self-made, SABMiller #13. Robert Pera Net Worth: $2.1 billion Age: 38 Source: Self-made, Ubiquiti Networks #12. Andres Santo Domingo Net Worth: $1 billion Age: 38 Source: inherited #11.Sean Parker Net Worth: $7.6 billion Age: 36 Source: self-made, Napster/Facebook #10. Joe Gebbia Net Worth: $3.3 billion Age: 35 Source: self-made, Airbnb #9. Brian Chesky Net Worth: $3.3 billion Age: 35 Source: self-made, Airbnb #8. Scott Duncan Net Worth: $7.2 billion Age: 33 Source: inherited #7. Nathan Blecharczyk Net Worth: $3.3 billion Age: 33 Source: self-made, Airbnb #6. Mark Zuckerberg Net Worth: $50 billion Age: 32 Source: self-made, Facebook #.5 Dustin Moskovitz Net Worth: $9.7 billion Age: 32 Source: self-made, Facebook #4. Julio Mario Santo Domingo III Net Worth: $2.3 billion Age: 31 Source: inherited #3. Lukas Walton Net Worth: $11.1 billion Age: 30 Source: inherited #2. Bobby Murphy Net Worth: $1.8 billion Age: 28 Source: self-made, Snapchat #1. Evan Spiegel Net Worth: $2.1 billion Age: 26 Source: self-made, Snapchat
