Nvidia CEO Jensen Huang sold 225,000 shares worth about $37 million as part of a prearranged trading plan, according to CNBC. Since starting stock sales this year, Huang has sold 1.2 million shares for around $190 million.

Nvidia stock is trading near its all-time high and has just surpassed the $4 trillion market capitalization milestone. But why is Jensen Huang selling NVDA stock right now?

Nvidia's CEO Jensen Huang says the technology giant has won approval from the Trump administration to sell its advanced H20 computer chips used for artificial intelligence to China.