Indian-origin billionaire Arun Pudur, CEO of software firm Celframe Technology Group of Companies, is among the world's top ten richest individuals under 40.
Wealth-X, global wealth intelligence and prospecting company, has placed Pudur at the tenth spot in the list with a personal fortune of $4 billion.
Pudur is a graduate of the University of Bangalore. Apart from ICT industries, he has also invested in the mining industry and precious minerals in various parts of the world.
Celframe boasts of an impressive clientele which includes fortune 500 companies like Boeing, MTv, Nortel, GM and Delta.
The list is topped by Faceboook CEO and chairman, Zuckerberg, who is estimated to be worth $35.1 billion, more than 40 per cent of the combined net worth of all the other billionaires on the list.
Zuckerberg is followed by another Facebook employee Dustin Moskovitz and WhatsApp co-founder and CEO Jan Koum in the second and third position respectively, Wealth-X said.
Dustin Moskovitz, Facebook's third employee and the youngest individual on the list has a fortune of $7.7 billion, while Jan Koum's personal wealth stood at $7.7 billion.
Two under-40 female billionaires have also featured in the list: 34-year-old Country Garden Holdings heiress Yang Huiyan of China, whose net worth totals US$5.1 billion and biotech entrepreneur Elizabeth Holmes, 31 with a fortune of US$4.5 billion, making her America's youngest female billionaire.
"The list is dominated by male technopreneurs, with four of the men deriving their fortunes from their early involvement in Facebook," Wealth-X added.
Sean Parker (Facebook's first president and Napster co-founder , another individual on the list who is linked with Facebook is ranked 5th with a fortune of $5.2 billion, and Eduardo Saverin (Facebook co-founder) ranked 9th with wealth of $4.4.
Others in the list include, Scott Duncan ranked 4th on the list with a fortune of $5.5 billion and Alejandro Santo Domingo Villa (7, $4.9 billion).