Chinas Alibaba Group Holding Ltd will acquire the shares of mobile browser firm UCWeb it does not currently hold, a UCWeb spokesman said on Wednesday, as the e-commerce company keeps racking up investments before its U.S. listing. Alibaba and UCWeb will form the UCWeb Mobile Business Group, Alibaba said on its microblog. UCWeb Chief Executive Yu Yongfu will act as chairman of the business group and become part of Alibabas strategic decision-making committee, Alibaba said.