Mark Zuckerberg’s Net Worth plunges $5bn over Facebook data controversy

Facebook shares took a big hit on Monday, shaving about $5 billion off of Mark Zuckerberg’s net worth.

The stock tumbled nearly 7% Monday on news that data firm Cambridge Analytica, which had ties to Trump’s campaign, reportedly accessed information from about 50 million Facebook users. This is the stock’s biggest drop, on a percentage basis, in about four years.

Zuckerberg holds about 400 million shares of Facebook through various entities that he controls, according to a filing last week. Shares were down $12.61 in midday trading.

Of course even with the single-day drop the value of his holdings, Zuckerberg still owns about $69.6 billion worth of Facebook shares. That’s enough to make him the sixth richest man in the world, according to Forbes’ real-time billionaire tracker.

The stock fell Monday after the Cambridge Analytica controversy prompted some outside observers to suggest that Facebooks should be more regulated. Some users have vowed to stop using Facebook and there are also questions about what the company will have to do to restore public trust in Facebook’s commitment to privacy and data protection.