Lei Jun is the cofounder and chairman of Xiaomi, one of the world's most popular smartphone brands. Xiaomi went public on the Hong Kong Stock Exchange on July 9, 2018. Lei's first success was selling online retailer Joyo.com to Amazon in 2004 for $75 million. Lei listed Kingsoft, an antivirus software firm, on the Hong Kong Stock Exchange in 2007.
He's also an investor in software firm Kingsoft and in JOYY Inc., a Nasdaq-listed social media platform that was known until December 2019 as YY.com.