Softbank Says Listing of Mobile Unit an Option; No Decision Made January 13, 2018 by quixnet Softbank Says Listing of Mobile Unit an Option; No Decision MadeU.S. News & World Report Sprint parent SoftBank files for $18 billion IPO of its mobile phone divisionPhone Arena UPDATE 4-SoftBank considers IPO for Japan wireless unit, said to seek $18 blnCNBC Masa and the GooseBloomberg Full coverage