(Bloomberg) -- Mark Zuckerberg's fortune slid $4 billion Thursday as shares of his Facebook Inc. dropped 5.7%, a day after the social-media giant posted its slowest-ever quarterly sales growth.
The decline left the chief executive officer with an $81 billion fortune as of 10:07 a.m in New York, with the shares trading at $210.41 apiece. Zuckerberg, 35, remains the world's fifth-richest person, according to the Bloomberg Billionaires Index. The ranking officially updates after the close of each trading day in the U.S.
Despite the drop, Zuckerberg's net worth is still up this year. His fortune had climbed $6.6 billion through Wednesday.
Shares of Menlo Park, California-based Facebook had dropped as much as 8.3% Thursday before paring the decline.
See also: Elon Musk adds $2.3 billion to his fortune in 60 minutes
To contact the reporter on this story: Tom Metcalf in London at tmetcalf7@bloomberg.net
To contact the editors responsible for this story: Pierre Paulden at ppaulden@bloomberg.net, Peter Eichenbaum
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