Zhou Xin / South China Morning Post:
Sources: Jack Ma and Joe Tsai become Alibaba's largest shareholders after buying shares worth ~$50M and ~$150M, respectively, in Q4, together eclipsing SoftBank — - Ma, who retired as Alibaba's executive chairman in 2019, bought about US$50 million of stock in the fourth quarter, raising his stake to more than 4.3 per cent