Citing a late May regulatory filing from Nvidia, it says that the company’s rock star CEO, Jensen Huang, opted to sell up to 600,000 shares, said to be worth an estimated $650 million.

He isn’t the only one. CFO Colette Kress, EVP of operations Debora Shoquist, and EVP of worldwide field operations Ajay Puri are likewise selling off some of Nvidia’s stock.