Japan’s SoftBank Corp said it expected a gain of about 500 billion yen ($4.6 billion) from Alibaba Group Holding’s share listing in New York, where the Chinese e-commerce leader surged 38 percent on its first day of trade. SoftBank CEO Masayoshi Son also told CNBC that he would want to own more of Alibaba, although he reiterated that the Japanese mobile carrier and Internet media company was happy with the current 32 percent stake, which made it the Chinese company’s biggest shareholder.