The value of Mark Zuckerberg’s stake in Facebook has plunged by $3bn, after a warning of slowing advertising growth sent the social media company’s share price tumbling.

The Facebook co-founder’s personal wealth has been reduced by 6%, the biggest loss ever suffered by an individual shareholder, according to the Bloomberg Billionaires Index, which ranks him as the world’s fifth richest person with a $52bn fortune.

Facebook almost tripled its profits in the third quarter, after taking a larger slice of the online advertising market. The company reported a 59% year-on-year increase in advertising revenues late on Wednesday.