Facebook’s Mark Zuckerberg has increased his stake in the social network, bringing the amount of the company that he owns to almost 30%.

The increase in Zuckerberg’s holdings were revealed in an SEC (U.S Securities and Exchange Commission) filing that was submitted on Wednesday this week. The filing shows that Zuck’s stake has risen to 632 million shares, bumping his stock ownership from 28.2% to 29.3% of Facebook.

Zuckerburg’s shares, based on current stock pricing, are reportedly worth $18 billion.

Source: GamesIndustry