Mark Zuckerberg Lost More Money Than Any of the World's Billionaires Facebook's difficult year has made a major dent in its CEO's wallet. Zuckerberg started 2018 with about $75 billion but is now worth roughly $56 billion. That's a $19 billion drop in his overall worth. Facebook shares has taken quite the hit this year following the Cambridge Analytica scandal, mismanagement and inappropriate content. The company's co-founder owns a 13% stake in
the company. Facebook's stock tumbled more than 20% after disappointing Q2 earnings. This reflected in a sharp drop in Zuckerberg's net worth. Zuckerberg has lost the most money in 2018 of any of the world's 500 richest people.