SoftBank Group Corp. said Friday it will sell part of its shareholding in a mobile telecommunications unit as the investment and technology conglomerate remains on the defensive during the coronavirus pandemic.The sale of about 1.03 billion shares in SoftBank Corp., worth about 1.4 trillion yen ($13 billion) based on its price on the Tokyo bourse Friday, will lower SoftBank Group's stake from 62.1 percent to 40.4 percent. The offering price will be determined after taking into account closing prices between Sept. 14 and 16, SoftBank Group said.SoftBank Group has been aggressively selling as…READ FULL ARTICLE