Bill Gates again beat Mexican businessman, Carlos Slim to the top spot.
Mr Gates’ net worth rose by over $3bn (£1.94bn) from $76 billion to $79.2 billion putting the Microsoft Corp co-founder at the top for the 16th year in the last 21, Forbes said on Monday.
Mexico Telecommunications mogul, Carlos Slim Helu ranked second, worth $77.1 billion, while Berkshire Hathaway Inc. Chief Warren Buffett was third, at $72.7 billion.
Legendary US investor, Warren Buffett, regained third place in the list with a net worth of $72.7bn, from Amancio Ortega, the founder of Spanish fashion chain, Zara.
Amancio Ortega, the Spanish founder of Inditex SA, which includes clothing retailer Zara, was fourth at $64.5 billion, while Oracle Corp Chairman, Larry Ellison, was fifth at $54.3 billion.
There are a record 1,826 billionaires in the world, Forbes said, an increase of 181 in the past 12 months.