https://www.reuters.com/article/us-alibaba-management/alibabas-jack-ma-to-step-down-in-sept-2019-zhang-to-become-chairman-idUSKCN1LQ035 >Jack Ma, the charismatic co-founder of China's largest e-commerce firm Alibaba Group Holding Ltd, will step down as chairman in exactly one year on Sept. 10, 2019, the company said.