Facebook CEO Mark Zuckerberg is no longer one of the world's top 10 technology billionaires.
Bloomberg reported Zuckerberg’s wealth fell by some $423 million on Thursday to $10.2 billion as Facebook stock plummeted to $20.04 a share.
Mashable wrote the stock made modest gains of about 2 percent at one point in trading on Friday.
The tech website wrote the Facebook co-founder is now worth less than James Goodnight, the co-founder of SAS Institute - who replaces him as technology’s 10th-richest person on Bloomberg's Billionaires Index.
Zuckerberg owns 503.6 million Facebook shares with an option to buy another 60 million at $.06 a share. Mashable added he has "$150 million in cash and other liquid assets."
More from GlobalPost: Mark Zuckerberg's sister, Arielle, now works at Google
This week has been full of bad news for the 28-year-old.
On Thursday, GlobalPost reported his younger sister, Arielle, announced she will be working at rival Google.
According to the New York Daily News, Arielle works as a product manager at Wildfire Interactive, which was purchased by Google. She tweeted "Not gonna lie...This feels pretty awkward."