The only other individuals worth more than Zuckerberg are Amazon.com founder Jeff Bezos, the leader at roughly $141 billion, and Microsoft co-founder Bill Gates.
Facebook has come back from eight-month low shares of $152.22 in late March, at a time when the company and its founder were embroiled in a data privacy crises which resulted in Zuckerberg testifying in Congress, to close on Friday at a record $203.23.
Zuckerberg is now worth $81.6 billion, almost $400 million more than Buffett, chairman of the Berkshire Hathaway investment group, rankings show.
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Subasic's four shootout saves are tied with Harald Schumacher of West Germany and Sergio Goygochea of Argentina for the most in a single World Cup.
Buffett, who once ranked as the world's wealthiest person, has now slid down to number four, largely in part to his charitable giving.
Tech-created fortunes comprise about 20% of the $5 trillion in wealth tracked by Bloomberg's index, the most of any industry sector.
Zuckerberg's net worth increased to $US81.6 billion on Friday, Bloomberg reported, after Facebook shares went up 2.4%.
Despite the recent string of scandals surrounding the social networking site, Zuckerberg's fortune does not appear to be suffering for any of it.
In 2014, Cambridge Analytica obtained data on 50 million Facebook users via means that deceived both the users and Facebook.