make the VW-Porsche 914 and 914-6, whereby the 914-6 had a Porsche engine, and the 914 had a Volkswagen engine. Further collaboration in 1976 resulted in the Porsche 912E (US only) and the Porsche 924, which used many Audi components, and was built at Audi's Neckarsulm factory, which had been NSU's. Porsche 944s were also built there, although they used far fewer Volkswagen components. The Cayenne, introduced in 2002, shares its chassis with the Volkswagen Touareg and the Audi Q7, which is built at the Volkswagen Group factory in Bratislava, Slovakia. Corporate restructuring Porsche SE was created in June 2007 by renaming the old Dr. Ing. h.c. F. Porsche AG, and became a holding company for the families' stake in Porsche Zwischenholding GmbH (50.1%) (which in turn held 100% of the old Porsche AG) and Volkswagen AG (50.7%). At the same time, the new Dr. Ing. h.c. F. Porsche AG (Porsche AG) was created for the car manufacturing business. In August 2009, Porsche SE and Volkswagen AG reached an agreement that the car manufacturing operations of the two companies would merge in 2011, to form an "Integrated Automotive Group". The management of Volkswagen AG agreed to 50.76% of Volkswagen AG being owned by Porsche SE in return for Volkswagen AG management taking Porsche SE management positions (in order for Volkswagen management to remain in control), and for Volkswagen AG acquiring ownership of Porsche AG. As of the end of 2015, the 52.2% control interest in VW AG is the predominant investment by Porsche SE, and Volkswagen AG in turn controls brands and companies such as Volkswagen, Audi, SEAT, Škoda, Bentley, Bugatti, Lamborghini, Porsche AG, Ducati, VW Commercial Vehicles, Scania, MAN, as well as Volkswagen Financial Services. Dr. Ing. h.c. F. Porsche AG (which stands for Doktor Ingenieur honoris causa Ferdinand Porsche Aktiengesellschaft), as a 100% subsidiary of VW AG, is responsible for the actual production and manufacture of the Porsche automobile line. The company currently produces Porsche 911, Boxster and Cayman sports cars, the Cayenne and Macan sport utility vehicles and the four-door Panamera. Porsche AG has a 29% share in German engineering and design consultancy Bertrandt AG and 81.8% of Mieschke Hofmann und Partner. In 2018, Porsche acquired a 10% minority shareholding stake of the Croatian electric sportscar manufacturer Rimac Automobili to form a development partnership. Initial public offering In February 2022, Volkswagen AG had announced that it would