Mark Zuckerberg is #3 on Forbes ' 2025 Forbes 400 list. Read more about Mark Zuckerberg , their experience, their asset summary, and more here. According to Forbes, Zuckerberg 's estimated net worth stood at US$251 billion as of October 2025, making him the third-richest person in the world. [3] He has used his funds to organize multiple large donations, including the establishment of the Chan Zuckerberg Initiative. Mark Zuckerberg 's Net Worth Drops As Meta's AI Plan Spooks Investors Zuckerbergs $29.2 billion drop was the fourth-largest one-day market-driven decline ever recorded by Bloombergs wealth index ... Meta co-founder Mark Zuckerberg ’s net worth reached the $200 billion mark Thursday, marking the first time the Forbes billionaire list has four billionaires worth $200 billion or more.
