TLDR: Mark Zuckerberg’s ranking on the Bloomberg Billionaires Index has fallen to fifth place, the lowest in nearly two years, after Meta’s substantial investments in artificial intelligence unsettled investors, causing an 11% decline in the company’s stock and wiping out $29.2 billion from his net worth.
Mark Zuckerberg, CEO of Meta Platforms Inc., has seen his position on the Bloomberg Billionaires Index fall to fifth place, marking his lowest ranking in nearly two years. This significant shift, reported on October 31, 2025, is primarily attributed to investor apprehension regarding Meta’s ambitious and costly investments in artificial intelligence (AI).
Meta’s stock experienced an 11% decline, its most substantial single-day drop since 2022, following the company’s announcement of its extensive AI spending plans. The tech giant revealed intentions to allocate between $70 billion and $72 billion towards AI capital expenditure by 2025. Furthermore, Meta indicated that it expects to spend up to $118 billion in capital expenditures this year, with potentially even higher figures projected for 2026. To help fund these massive AI initiatives, Meta also announced a planned $30 billion debt sale, issuing the largest investment-grade bond offering of the year.
The market’s reaction to these announcements was swift and severe. The stock sell-off resulted in a staggering $29.2 billion reduction in Zuckerberg’s personal fortune, bringing his estimated net worth down to approximately $235 billion. This drop represents the fourth-largest one-day market-driven decline ever recorded by Bloomberg’s wealth index. Prior to this downturn, Meta’s stock had seen a 28% gain this year, adding $57 billion to Zuckerberg’s wealth.
Analysts have expressed concerns over Meta’s ballooning AI budget, with at least two firms downgrading the company’s shares. The uncertainty surrounding the return on investment for such massive AI outlays has made investors nervous. Meanwhile, rivals such as Amazon.com Inc.’s Jeff Bezos and Alphabet Inc.’s Larry Page have seen their fortunes climb, surpassing Zuckerberg on the index. Both companies reported stronger stock performances, partly fueled by robust demand for their cloud and AI services, with Alphabet’s shares rising 2.5% after beating revenue expectations.
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Despite investor jitters, Meta remains committed to its AI strategy, actively integrating AI services into its core products, including Facebook and Instagram. The company is also undertaking significant infrastructure projects, such as the Hyperion data center campus in Louisiana, which is projected to draw up to five gigawatts of power at full load, underscoring the scale of its AI ambitions.
