2. Joseph Tsai
Net Worth: $14.36 billion
Change from 2017 Ranking: ▲73.6%
Major company holdings: Alibaba
Joseph Tsai is the right-hand man of Alibaba founder Jack Ma. After navigating the company through its first substantial challenges (the U.S. authorities investigated Alibaba’s accounting practices last year, concerned about data from its blockbuster annual sale), Tsai is making more positive headlines of late. In September, the company’s stock reached a 100% increase over last year, as Tsai and Ma discussed selling up to 22.5 million (or US$4 billion worth) of the company’s shares. On the side, Tsai has been eyeing ownership of the Brooklyn Nets for US$2.2 billion.