What if in January 1945, the Third Reich and the Empire of Japan both attempted to nationalize all of the companies within their countries? From January to their surrender, they subsume every company within a particular industry (such as automotive manufacture) into one state-owned company for that industry inseparable from the regime, and then abolishing their subsidiaries. This process is mostly complete by the time of surrender.
The end result is that when the Allies win, it's very difficult to separate these companies from the fascist regimes, and a lot easier to just acquire all the assets and then divvy them up among the highest bidders in the United States, United Kingdom, France, and the Low Countries. For example, this might lead to postwar West Germany only having American and British and French companies. If so, what would the economic and political effects be?