Masayoshi Son founded SoftBank in 1981. It has invested millions in some of Silicon Valley's biggest tech companies.

The following is adapted from Gambling Man, my new biography of Masayoshi Son ... Nvidia founder Jensen Huang remains a good friend and likes to remind Masa that he sold his 5 percent stake ...

First up, Nvidia, which was one of the biggest casualties yesterday, also saw its founder-CEO Jensen Huang lose about ... In addition, SoftBank chief Masayoshi Son also saw his net worth slip ...

SoftBank CEO Masayoshi Son has been a champion of AI for years ... "Together we're going to build Japan's largest AI factory," Huang said at the company's AI summit in Tokyo.