(Reuters) - WeWork Cos said on Thursday it received an additional $3 billion investment from Japan's SoftBank Group (9984.T) and its Vision Fund, helping the shared-office startup ramp up its expansion globally. SoftBank's investment will be through new shares and the acquisition of existing shares of the startup's parent company, WeWork said in a statement New York-based WeWork said SoftBank's Director and Vice Chairman Ronald Fisher and External Director Mark Schwartz will join the company's board.