SoftBank billionaire founder and CEO, Masayoshi Son, has an estimated net worth of $16.3 billion, according to Bloomberg's Billionaires Index. Through his $100 billion Vision Fund and SoftBank, Son invests millions in some of Silicon Valley's largest tech companies, including Uber, Slack, WeWork, and DoorDash. In December 2016, Son pledged to invest $50 billion in U.S. companies and prompt 50,000 jobs.