Martin Winterkorn (R), CEO of German carmaker Volkswagen, and his counterpart from German sports car maker Porsche AG Matthias Mueller (L) laugh before a news conference in Wolfsburg, July 5, 2012. Volkswagen's plan to take full control of sports-car maker Porsche AG in less than one month boosted VW shares and those of Porsche's holding company in pre-market trading on Thursday. Porsche SE, the holding company that still controls about half of the sports-car business that VW does not already own, will receive 4.46 billion euros ($5.58 billion) plus a single common VW share, VW said in a statement late on Wednesday. REUTERS/Fabian Bimmer (GERMANY - Tags: BUSINESS TRANSPORT)