Mark Zuckerberg lost $29 billion in net worth on Thursday as Meta Platforms Inc's stock marked a record one-day plunge, while fellow billionaire Jeff Bezos was set to add $20 billion to his personal valuation after Amazon's blockbuster earnings.

Meta's stock fell 26%, erasing more than $200 billion in the biggest ever single-day market value wipeout for a U.S. company. That pulled down founder and Chief Executive Officer Zuckerberg's net worth to $85 billion, according to Forbes.

Zuckerberg owns about 12.8% of the tech behemoth formerly known as Facebook.

Bezos, the founder and chairman of e-commerce retailer Amazon, owns about 9.9% of the company, according to Refinitiv data. He is also the world's third richest man, according to Forbes.

Amazon's holiday-quarter profit surged, thanks to its investments in electric vehicle company Rivian; and the company said it would hike annual prices of Prime subscriptions in the United States, sending its shares up 15% in extended trading and readying it for its biggest percentage gain since October 2009 on Friday.