AUDI AG, (Xetra: NSU), commonly known as Aui (pronounced /ˈaʊdi/), is a premium German automobile manufacturer and a performance-luxury marque, with headquarters in Ingolstadt, Bavaria. It has been an almost wholly-owned (99.7%) subsidiary of the Volkswagen Group (Volkswagen AG) since 1964, and is held in ownership by its shareholders – hence the term "Aktiengesellschaft" or "AG". The company evolved from Volkswagen Group's takeover of both Auto Union, and NSU Motorenwerke AG (NSU), the former having incorporated the historic Audi company which was founded in 1910.