Mark Zuckerberg Loses $16.30B in a Day as META Slides 7.95%
Mark Zuckerberg's net worth fell by $16.30B (6.94%) on July 31, 2026, putting the Meta Platforms fortune at an estimated $218.66B — #6 in the world.
Published · Updated as figures moved · By RealTimeBillionaire Data Desk
Mark Zuckerberg lost $16.30B of net worth on July 31, 2026, one of the day's biggest moves among the world's richest people. The swing (-$16.30B, or 6.94%) leaves the fortune at an estimated $218.66B, ranked #6 on our real-time list.
The move traces to META, the listed company behind most of the fortune, which fell 7.95% on the day to 539.03 USD per share. Because a billionaire's wealth is concentrated in stock, daily net worth simply follows the share price multiplied by the shares held.
The loss leaves Mark Zuckerberg $19.89B behind Sergey Brin ($238.55B) one spot up, with Jensen Huang closing in from below at $161.03B.
Co-founder, chairman, and CEO of Meta Platforms (Facebook, Instagram, WhatsApp).
Figures are our real-time estimates, derived from public stock holdings plus a static estimate for private assets — directional, not audited, and they will move again with the next trading session.