No, it is Toyota. This includes wholly owned subsidiaries, etc. It was GM for a very long time, but it is no longer. Fiat, including the companies it owns, is #11.
update: To those insisting it is GM, VW, or others strictly based on the fact that they own 8 or more other companies really need to check facts. My link is factual and is including ALL subsidiary (aka. owned) companies.
