Zuckerberg, who trails only Amazon.com founder Jeff Bezos and Microsoft co-founder Bill Gates, eclipsed Buffett last Friday as Facebook shares climbed 2.4%, according to the Bloomberg Billionaires Index. It's the first time that the three wealthiest people on the ranking made their fortunes from technology.
Zuckerberg, 34, is now worth $81.6 billion, about $373 million more than Buffett, the 87-year-old chairman and chief executive officer of investment company Berkshire Hathaway. Facebook co-founder Mark Zuckerberg has overtaken Warren Buffett as the world's third-richest person.
Technology fortunes make up about a fifth of the more than $5 trillion in wealth tracked by the Bloomberg index, more than any other sector. The ranking, which tracks the world's 500 richest people, is updated after the close of each trading day in New York. Buffett, once the world's wealthiest person, is sliding in the ranking thanks to his charitable giving, which he kicked off in earnest in 2006.