Porsche is owned by Volkswagen AG, which itself is largely controlled by Porsche Automobil Holding SE (Porsche SE). Porsche SE is a holding company mostly owned by the Porsche–Piëch family. Porsche SE holds a controlling stake in Volkswagen AG, and Volkswagen AG in turn fully owns Porsche AG, the car manufacturing company. Thus, Porsche AG operates as a subsidiary of Volkswagen AG, which is controlled by Porsche SE, creating a complex ownership structure where Porsche SE indirectly owns Porsche AG through Volkswagen AG.

In summary:

• Porsche AG (the car manufacturer) is a 100% subsidiary of Volkswagen AG.
• Volkswagen AG is majority controlled by Porsche SE.
• Porsche SE is mainly owned by the Porsche–Piëch family.

This corporate structure means Porsche is ultimately owned by the Porsche–Piëch family through their control of Porsche SE and Volkswagen AG.