In late March, Daniel Zhang unveiled what was called the “most significant” overhaul in the 24-year history of Alibaba, one of China’s original technology conglomerates, splitting the company into six separate units that would help them seek out investors from the public.Now, Mr. Zhang, the tech giant’s chairman and chief executive, is out of the top job and will step down from Alibaba’s board of directors, and two of the company’s co-founders have moved up into the leadership positions.Alibaba announced on Tuesday that Mr. Zhang, 51, would relinquish his top job in September. Instead, he would serve only as chief executive of Alibaba’s cloud computing division, a position he assumed in March when he unveiled the restructuring. Alibaba announced plans to spin off its cloud division in May, in preparation for a public listing.Joseph Tsai, 59, an Alibaba veteran with roots to the company’s foundi …
