Facebook CEO Mark Zuckerberg is the biggest gainer in Forbes' 2016 billionaires list of the world's richest people, moving up 10 spots from last year to claim the ranking as the world's sixth richest person, the business magazine said Tuesday.
The tech executive and social media leader achieved the feat with total net worth that Forbes estimated at $44.6 billion, up from $33.4 billion in the 2015 ranking.
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