Zoom Video Communications CEO Eric Yuan’s added $4.2 billion to his fortune on Monday, according to Bloomberg Billionaire Index. The shares of his virtual-meeting company increased by 26% to $410 in late US trading as it reported a jump in the quarterly revenue.

Zoom’s shares are further expected to rise, and if the stock on Tuesday maintains the same gain as Monday, Yuan’s fortune would cross $20 billion, Bloomberg reported.

The richest persons in the tech world have added a tremendous amount to their fortune, with the world’s richest Amazon’s Jeff Bezos added $13 billion in a day in July, Tesla CEO Elon Musk added $8 billion in 24 hours in August. Bezos’s wealth hit a record level by crossing $200 billion while Musk surpassed $100 billion last week. The Tesla CEO’s fortune also surpassed Facebook CEO Mark Zuckerberg on Tuesday, and became the third-richest person in the world, after Bezos and Bill Gates, Bloomberg reported.

Yuan’s Zoom became widely popular after the coronavirus pandemic hit the world, shutting offices and educational institutions and halting most of the physical interactions.

The virtual-video meeting company on Monday reported that its sale jumped to 355% to $663.5 million in three months through July, which is the second-largest surge among Nasdaq 100 Index members last quarter, the Bloomberg report said.

According to the company, its sales would be as much $2.39 billion in the fiscal year ending January, meaning Zoom’s revenue would almost quadruple in just one year.

Zoom founder Yuan, 50, was $12.8 billion richer as of Monday and he is among the biggest gainers this year.