Mark Zuckerberg Net Worth No Longer On Bloomberg Billionaire's List After Facebook Share Slide Mark Zuckerberg lost almost $5 billion in net worth in just a couple weeks. I sure would hate to be him right about now. After all, he just recently got married. How would like to sit down with your spouse and tell them you lost almost $5 billion (or 25%) of your net worth in only a couple weeks. I hope she is a forgiving woman.