TOKYO -- SoftBank Group chairman and CEO Masayoshi Son said on Thursday he is retiring from the board of Alibaba Group Holding after nearly 15 years, marking a new chapter in his relationship with the Chinese e-commerce giant that has been his most successful investment.
Alibaba co-founder Jack Ma also retired from SoftBank's board after its annual shareholder meeting on Thursday. SoftBank shareholders approved the appointment of three new directors.
