Porsche, which is best known for its iconic 911 sports car, is one of the most storied marques in automotive history. Its relationship with Volkswagen goes back to before World War II, and in 2009 it formally became one of the group's brands. But while Volkswagen is the automaker's parent company, Porsche Automobil Holding, the investment group for the Piëch and Porsche families, owns 51 percent of its voting rights. If that sounds complicated that's because it is—although the arrangement has also proven to be very lucrative for both sides.