Blume also serves as the CEO of Porsche parent company Volkswagen, where he will remain in charge. Blume's dual role at the top of two major auto brands had drawn criticism. Blume has been chief executive of Porsche since 2015 and has served in the dual role as VW CEO since 2022Image: Ronny Hartmann/AFP via Getty Images Oliver Blume is to step down as the CEO of German sports carmaker Porsche, the firm said on Friday.