10. Larry Page, $50.8bn
In 1998, Page co-founded Google with business partner Sergey Brin, and still helms Alphabet, Google’s parent company.
9. Michael Bloomberg, $55.5bn
The founder, chief executive and owner of mass media firm Bloomberg LP, Bloomberg took time off from business between 2002 and 2013 in order to serve three consecutive terms as the 108th mayor of New York City.
8. Mark Zuckerberg, $62.3bn
The Facebook chief executive and founder’s wealth has shrunk by $8.7bn (£6.6bn) in the past year, as the company battled privacy scandals, the BBC says.
7. Larry Ellison, $58bn
Cofounder of software firm Oracle, Ellison stepped down as CEO in 2014 but still serves as chairman of the board and chief technology officer.
6. Amancio Ortega, $62.7bn
Ortega stepped down as chairman of Inditex, known for its Zara brand, in 2011 but he still owns nearly 60% of its shares
5. Carlos Slim Helu, $64bn
Mexico’s richest man, Slim Helu, and his family control America Movil, Latin America’s biggest mobile telecommunications firm. He also owns a stake in Mexican construction, consumer goods, mining and real estate, as well as 17% of The New York Times.
4. Bernard Arnault, $76bn
Arnault is the wealthiest European on the list. The Frenchman oversees an empire of more than 60 brands including Louis Vuitton and Sephora.
3. Warren Buffet, $82.5bn
Now in his ninth decade, the Berkshire Hathaway chief executive, known as the “Oracle of Omagh” is one of the most successful investors of all time. Like Gates he has pledged to give away more than 99% of his fortune to charity.
2. Bill Gates, $96.5bn
A permanent fixture at the top of Forbes’ list for the past 20 years, the Microsoft founder has sold or given away much of his stake in the company – he owns just 1% of Microsoft – and now focuses predominantly on his philanthropic work.
1. Jeff Bezos, $131bn
The former hedge fund manager turned online book seller started Amazon in his garage in 1994. He still owns 16% of the e-commerce colossus which has seen its share price rise nearly 500% in the past five years.