Indian billionaire chief executive officer of Malaysia-based Celframe Technology Group of Companies, Arun Pudur, is among the world's top 10 richest individuals under 40, according to a list published on Wednesday by Wealth-X, a global wealth intelligence and prospecting company.
Pudur, 36, is ranked at 10th position on the list with a personal fortune of $4 billion. His company has over 500 clients, including Boeing, MTV, Nortel, General Motors and Delta.
An investor with a passion for solving consumer problems, Pudur began his career at the age of 13 fixing bikes, and breeding champion dogs before he graduated to start his technology business.
He made his first million at the age of 21, first billion at the age of 26 and never looked back.
Facebook co-founder Mark Zuckerberg, 30, topped the list.
The list is dominated by other male technopreneurs, with four of them deriving their fortunes from their early involvement in Facebook.
Zuckerberg's wealth is estimated at $35.1 billion, more than 40 percent of the combined net worth of all the other billionaires on the list.
Four other individuals from Facebook -- Dustin Moskovitz, Sean Parker, Eduardo Saverin and Jan Koum -- also appear on the list.
Koum is also co-founder and CEO of mobile messaging application WhatsApp, which was acquired by Facebook in 2014 for $19 billion.
Koum's personal fortune of $7.7 billion earns him third place on the list.
The list also features two under-40 female billionaires.
Yang Huiyan, of China, a 34-year-old Country Garden Holdings heiress, whose net worth totals $5.1 billion, makes her Asia's richest woman. Biotech entrepreneur Elizabeth Holmes, 31, who has amassed a fortune of $4.5 billion, is America's youngest female billionaire.