Well, Facebook’s market cap is $347.21 billion at the time of me writing this. If Mark Zuckerberg owns 1% of that, that’s $3.4721 billion.

However, it appears that Mark Zuckerberg actually owns over 475 million shares of Facebook, which at $120.57 gets us $57.27 billion, or around 16.5% of Facebook.

So even though 1% of Facebook is a fairly ludicrous amount of money, Mark Zuckerberg actually owns over 16 times that amount.

So to answer you question, 1% of Facebook’s stock is worth almost 3 and a half billion dollars, and Mark Zuckerberg’s share of Facebook is worth nearly $60 billion.

https://www.nasdaq.com/market-activity/stocks/meta