They built him up. And now they want to bring him down. SoftBank’s sudden turn against WeWork CEO Adam Neumann highlights how the Japanese conglomerate has wielded far more dollars than sense in its investment strategy. Officials tied to SoftBank want Neumann to step down as CEO, according to reports over the weekend. SoftBank and its Vision Fund are WeWork’s biggest investors, with a stake of around 29% in We Co., the company’s official name.