It's the first time that the three wealthiest people on the ranking made their fortunes from technology.
Zuckerberg's ascent to No. 3 underscores a sharp climb in Facebook shares since late March, when they was reeling following reports of a data-handling scandal with political consultant Cambridge Analytica. Since then, the tech giant has made a remarkable recovery, with its shares closing at an all-time high of $203.23 on Friday.
Zuckerberg is now worth $81.6 billion, almost $400 million more than Buffett, chairman of the Berkshire Hathaway investment group, rankings show. Overall, the sector has contributed about one-fifth of the $5 billion in wealth tracked by the index, Bloomberg reported. The ranking, which tracks the world's 500 richest people, is updated after the close of each trading day in NY.
Mother's lifestyle choices linked to obesity risk in teenagers
When both children and mothers followed a healthy lifestyle , there was a 82% reduced risk of their offspring being obese . Finally, they drink light to moderate amounts, quantified as two small glasses of wine or one standard pint of beer a day.
Buffett, who once ranked as the world's wealthiest person, has now slid down to number four, largely in part to his charitable giving. He's donated about 290 million Berkshire Hathaway Class B shares to charities, most of it to Gates's foundation.
The Facebook CEO's net worth as calculated by Bloomberg is $81.6 billion after the company's stock spiked 15 percent this year despite being embroiled in a data breach scandal.
Zuckerberg has pledged to give away 99 percent of his Facebook stock away in his lifetime, his Bloomberg profile shows.