Mark Zuckerberg may be having a hard time at the moment due to the recent Facebook outage and whistle-blower scandal, but he’s still the US’ richest person under the age of 40. So who else is hot on his heels? Forbes has just published its list of the youngest billionaires in the country, so read on to find out who made the cut, in order of oldest to youngest. The world’s 6 richest families making – and spending – billions 10. Nathan Blecharczyk, Airbnb co-founder Age: 38 Net worth : US$10 billion Industry : Tech, hospitality Alongside Brian Chesky and Joe Gebbia, Nathan Blecharczyk is one of the co-founders of the wildly successful hospitality company Airbnb. He currently serves as chief strategy officer, and helped lead the company through a massive business downturn during the early days of the Covid-19 pandemic. Who are the stingiest billionaires of 2021? From Jeff Bezos to Elon Musk 9. Brian Armstrong, CEO of Coinbase Age: 38 Net worth : US$11.5 billion Industry : Tech, finance Brian Armstrong serves as the CEO of Coinbase, the US’ largest cryptocurrency trading firm. He has amassed a vast wealth due to his stake in the company – he reportedly owns nearly one-fifth of Coinbase’s shares. Coinbase went public in April with a valuation of about US$100 billion. 8. Dustin Moskovitz, Facebook co-founder and CEO of Asana Bollywood’s 10 richest couples, ranked – from the Khans to the Bachchans Age: 37 Net worth : US$24.1 billion Industry : Tech Dustin Moskovitz, one of the early co-founders of Facebook, owns an estimated 2 per cent stake in his former employer. After leaving Facebook, Moskovitz went on to co-found Asana, which makes and sells workplace organisation software. Despite owning nearly one-third of his current company, Facebook is simply so huge that his relatively small share in the tech giant is still extremely valuable. 7. Mark Zuckerberg, Facebook CEO and co-founder Age: 37 Net worth : US$134.5 billion Industry : Tech Mark Zuckerberg may not be the youngest billionaire on this list, but he is the richest by quite some way. As you might have guessed, Zuckerberg’s billions are tied to his partial ownership of Facebook – he currently owns around 14 per cent of the social media conglomerate. How did Cristiano Ronaldo become football’s first billionaire? 6. Baiju Bhatt, Robinhood co-founder Age: 37 Net worth : US$2.9 billion Industry : Tech, finance Baiju Bhatt co-founded Robinhood, the company behind the stock trading app of the same name, back in 2013. In the eight years since, Robinhood has set the standard in mobile stock trading. It went public earlier this summer, but sparked a wave of criticism from institutional investors who objected to so many non-professional investors being allowed a chunk of the IPO. 5. Lukas Walton, Walmart fortune heir Age: 35 Net worth : US$17.2 billion Industry : Retail Lukas Walton is wealthy due to inheritance – he is the grandson of Sam Walton, founder of Walmart . However rather than running the family business, Walton is primarily involved in philanthropy and currently serves as the chair of the Walton Family Foundation’s environment programme committee. 5 stars with billion-dollar empires, from Kim K to Oprah 4. Fred Ehrsam, Coinbase co-founder Age: 33 Net worth : US$3.5 billion Industry : Tech, finance After co-founding Coinbase, the largest public exchange for cryptocurrency, Fred Ehrsam founded a blockchain investment company called Paradigm. Among its investments? Coinbase and FTX, now two of the most widely used cryptocurrency exchanges in the world. 4 times Ambani heiress Isha looked a million dollars 3. Bobby Murphy, Snap CTO Age: 33 Net worth : US$15.2 billion Industry : Tech Though Bobby Murphy serves as chief technology officer at Snap (formerly known as Snapchat ), he built most of his wealth by being a co-founder of the social media company he now helps to run. Snap shares have risen dramatically since it first went public in 2017. 8 billionaires whose kids won’t inherit their fortunes 2. Evan Spiegel, Snap CEO Age: 31 Net worth : US$13.8 billion Industry : Tech Similar to Bobby Murphy, Snap CEO Evan Spiegel became wealthy as a co-founder and stakeholder of the company behind social media goliath Snapchat. Like Zuckerberg, Spiegel has so far managed to avoid losing control of the social media service he co-founded. 6 things to know about Indian former billionaire B.R. Shetty 1. Sam Bankman-Fried, crypto entrepreneur Age: 29 Net worth : US$22.5 billion Industry : Tech, Finance At just 29 years old, Sam Bankman-Fried is the youngest billionaire in the US. The MIT physics graduate earned that title by building and running FTX, a major cryptocurrency exchange that competes with Coinbase, and has said publicly that he plans to donate most his wealth to charity over the course of his life. This article originally appeared on Business Insider Want more stories like this? Sign up here. Follow STYLE on Facebook , Instagram , YouTube and Twitter .