Rivian shares soar on Volkswagen plan to invest up to $5bn Financial TimesRivian secures up to $5 billion from Volkswagen, shares soar 40% CNBCVW to invest up to $5bn in Tesla rival Rivian AOLWhat are these hidden vehicles in Rivian’s shareholder letter? ElectrekGerman car maker VW to invest up to $5bn in Tesla rival Rivian BBC.com