Apple’s stock has fluctuated but largely risen over the past three months leading up to its big presentation, where the company is expected to announce a 10th anniversary phone that may be called the iPhone 8, iPhone X or iPhone Edition. That means that Cook, as an Apple stockholder, has benefited from the company’s success. But what is Tim Cook’s net worth?

We asked Dan Marcec, director of content at Equilar, a data-focused company that has reported on CEO compensation. Cook’s total Apple shares and options are worth $621,973,055 altogether, according to Marcec. But that isn’t the only place Cook makes his money. He also sits on Nike’s board of directors, giving him an additional $3,399,662 in Nike stocks and options. This brings his total net worth to at least $625,372,717 based on stock closings on Wednesday, Sept. 6. His net worth is likely higher, based on additional assets in his investment portfolio, any property he owns and any cash he has on hand. However, that information isn’t publicly available, so the $625 million figure is Marcec’s best low estimate.

In 2015, Cook said he would give away all of his money, a commitment many other wealthy philanthropists —including Bill Gates and Warren Buffet — have made as well.

This article was originally published at Time.com