Some people don't need to spend a lifetime building wealth. Forbes just dropped its World's Billionaires List, which ranks and profiles the richest people in the world. The 2,095 billionaires on the list are worth a collective total of US$8 trillion, down US$700 billion from their collective worth in 2019. The youngest billionaire in America is 22-year-old Kylie Cosmetics founder Kylie Jenner, followed by Snapchat co-founder Evan Spiegel. Together, the 15 youngest billionaires in America are worth more than US$100 billion. Here they are, listed in order from oldest to youngest. 15. Brian Armstrong, co-founder and CEO of Coinbase Age: 37 Net worth: US$1 billion Industry: tech Armstrong is the CEO and co-founder of the cryptocurrency exchange Coinbase. The company was launched in 2012 and was valued at US$8 billion in 2018. 14. Drew Houston, co-founder and CEO of Dropbox Age: 37 Net worth: US$1.3 billion Industry: tech Houston is the CEO and co-founder of Dropbox, which has more than 500 million current users. He launched the company in 2007 when he was just 24. The company went public in 2018. Houston still owns more than 20 per cent of the company, making him the company's largest individual shareholder. How the 5 youngest US billionaires spend their time and money 13. Lynsi Snyder, owner and heiress to In-N-Out Burger Age: 37 Net worth: US$3.6 billion Industry: fast food Lynsi Snyder received her full inheritance to West Coast fast-food chain In-N-Out Burger, founded by her grandparents, on her 35th birthday. Her father and uncle passed away young, and Snyder was the last family heir at age 18. In 2010, she became president and has since expanded In-N-Out. As Business Insider reported in October 2018, Snyder is very popular with her employees. At the time, she had a 96 per cent approval rating on Glassdoor. 12. Scott Duncan, heir to Enterprise Products Partners Age: 36 Net worth: US$3.6 billion Industry: oil Along with his three siblings, Scott Duncan inherited a stake in his father Dan Duncan's pipeline firm, Enterprise Products Partners, in 2010. The company owns natural gas processing plants, oil and gas storage facilities, and oil and gas pipelines. Duncan isn't actively involved. The Duncans are one of America's wealthiest families. In 2018 they had a collective net worth of US$24.8 billion. 11. RJ Scaringe, founder of electric car company Rivian Automotive Age: 36 Net worth: US$1 billion Industry: automotive Scaringe is the founder of electric car manufacturer Rivian Automotive. He launched the company in 2009 and debuted his first cars in 2019. He expects the models to be produced later this year. 15 people who became billionaires in 2019 – and 14 who lost their spot 10. Kevin Systrom, co-founder of Instagram Age: 36 Net worth: US$1.3 billion Industry: tech Systrom co-founded Instagram with Mike Krieger in 2010. In 2012 the company was bought by Facebook for US$1 billion. At the time, Systrom owned 40 per cent of the company. He stayed on as Instagram's CEO until leaving the company in 2018. 9. Nathan Blecharczyk, co-founder and chief strategy officer of Airbnb Age: 36 Net worth: US$4.1 billion Industry: tech Nathan Blecharczyk co-founded Airbnb with Joe Gebbia and Brian Chesky. He was the company's first engineer. Airbnb now operates in more than 100,000 cities and has seven million listings worldwide 8. Chris Wanstrath, co-founder of GitHub Age: 35 Net worth: US$1.4 billion Industry: tech Wanstrath co-founded the software company Github in 2008. In 2018 Microsoft announced it was going to buy the company for US$7.5 billion in an all-stock deal. At the time, Wanstrath was the largest individual shareholder. He now works at Microsoft as a technical fellow, according to Forbes . 7. Dustin Moskovitz, co-founder Facebook and Asana Age: 35 Net worth: US$9.3 billion Industry: tech Dustin Moskovitz co-founded Facebook with Mark Zuckerberg in 2004. He left Facebook in 2008 to launch workflow software company Asana, which earned more than US$100 million in revenue in 2018. Moskovitz still owns an estimated 2 per cent stake in Facebook and has given US$1.4 billion away to charity. As previously reported in Business Insider , Moskovitz numbers among the many successful tech moguls who never graduated from college. He dropped out of Harvard along with Zuckerberg to pursue Facebook. 6. Mark Zuckerberg, co-founder and CEO of Facebook Age: 35 Net worth: US$54.7 billion Industry: tech Mark Zuckerberg created Facebook in 2004 and took it public in 2012. Zuckerberg still owns about 15 per cent of the stock. In 2015, he and his wife, Priscilla Chan, pledged to donate 99 per cent of their Facebook stake during their lifetimes. How much did the world’s richest lose in the coronavirus market crash? 5. Julio Mario Santo Domingo III, heir to one of the world's biggest beer fortunes Age: 34 Net worth: US$1 billion Industry: beverage Julio Mario Santo Domingo III's late grandfather owned a large stake in SABMiller after it was acquired by his brewer Bavaria. In 2016, Anheuser-Bush InBev acquired SABMiller for US$100 billion. Santo Domingo is an heir to the fortune and a DJ for the NYC-based group Sheik 'N' Beik. 4. Lukas Walton, heir to the Walmart fortune Age: 33 Net worth: US$18.4 billion Industry: retail Lukas Walton is the grandson of Sam Walton, who founded Walmart. When his father, John Walton, died in a plane crash in 2005, he inherited about one-third of John's estate. While he owns a stake in Walmart, he doesn't work for the company and devotes time to philanthropic causes. The Waltons are the richest family in the US. Three of Lukas' relatives are among the top 15 wealthiest billionaires in the world. 3. Bobby Murphy, co-founder and chief technology officer of Snapchat Age: 31 Net worth: US$1.9 billion Industry: tech Bobby Murphy co-founded Snapchat with his Stanford fraternity brother Evan Spiegel. As of January 2019, Snap Inc. was worth under US$8 billion, CNBC reported. As Business Insider reported in 2017, Murphy keeps a relatively low profile and has only given a handful of interviews. 2. Evan Spiegel, co-founder and CEO of Snapchat Age: 29 Net worth: US$1.9 billion Industry: tech Evan Spiegel co-founded multimedia messaging app Snapchat with Murphy. He and Murphy each own roughly 18 per cent of Snap, but have voting shares that allow them control over the board. He's only one of three self-made billionaires in the world not yet 30 and as of 2019 had donated nearly US$65 million in Snap stock. Spiegel is married to supermodel Miranda Kerr. 1. Kylie Jenner, founder of Kylie Cosmetics Age: 22 Net worth: US$1 billion Industry: Cosmetics Kylie Jenner founded Kylie Cosmetics in 2015. By 2019, Forbes had dubbed her the “youngest self-made billionaire” ever. Having previously owned 100 per cent of her business, in late 2019 Jenner agreed to sell a 51 per cent stake in her company to beauty conglomerate Coty Inc. for US$600 million. The deal valued Kylie Cosmetics at US$1.2 billion. Want more stories like this? Sign up here . Follow STYLE on Facebook , Instagram , YouTube and Twitter . This article originally appeared on Business Insider .