Mark Zuckerberg's Fortune Soars $25.8 Billion in a Single Day as Meta Becomes Wall Street's AI Darling Once Again

Mark Zuckerberg’s paper fortune jumped by about $25.8 billion in a single trading day on September 21, 2026, according to the Bloomberg Billionaires Index. Forbes put the one-day increase at roughly $25 billion, tying the move to Zuckerberg’s push for “personal superintelligence.” Different wealth trackers use different methods, but both figures reflect the same driver: Meta’s share-price swing. India.com reported Meta shares surged nearly 12% ahead of an artificial intelligence event. Meta traded at $745.69 as of 9:53 a.m. ET on September 22, up 0.60%. Over one week, Meta is up 12.11%, and up 35.70% over one month.