The IPO price range will be set on Nov. 30, followed by the final price on Dec. 10.: SoftBank Group Corp. founder Masayoshi Son is seeking to raise 2.4 trillion yen ($21.1 billion) in an initial public offering of his Japanese telecom business that could be the country’s largest IPO yet. The Japanese technology giant said in a prospectus Monday it will sell 1.6 billion shares at 1,500 yen apiece in a new entity, SoftBank Corp., that will start trading on Dec. 19.