As Meta Platforms (FB) saw its shares drop more than 26% on Thursday on reports of a profit decline for 2021, Mark Zuckerberg saw his personal wealth decrease by a whopping $31 billion.

The Facebook founder dropped three places to No. 10 on the Bloomberg’s Billionaires Index of the world’s richest people, sitting behind Oracle co-founder Larry Ellison and ahead of Mukesh Ambani, an energy technology entrepreneur from India.

Zuckerberg’s net wealth now sits at $89.6 billion, according to the list.

Tesla CEO Elon Musk tops the Bloomberg Billionaires Index with a net worth of $231 billion.

Zuckerberg owns more than 398 million shares of Meta, or 14.2% of the company, according to a February 2021 Securities and Exchange Commission filing obtained by CNN.

Meta, which was formally known as Facebook, had the worst performing day on the stock market in its history on Thursday. It lost nearly $240 billion from its market value, according to the outlet.

The loss comes as the company reported a net loss of $10 billion in 2021, CNBC reported. This was in addition to a slight decrease in its active daily users on Facebook in the U.S. and Canada compared to the previous quarter.

In a call with analysts, Zuckerberg addressed the loss by saying, as reported by CNN, “This fully realized vision is still a ways off. And although the direction is clear, our path ahead is not yet perfectly defined.”

As of Friday 11:42 a.m. ET, shares of Meta were trading at $232.03, down $5.73 or 2.41%.

Facebook's CEO Mark Zuckerberg is promoting the concept of his company producing a virtual world 'metaverse'
Facebook CEO Mark Zuckerberg. AFP / MANDEL NGAN