I'll only say this folks. There have been books written on this subject years back. To long ago, but I specifically remember reading a book on how ITT (International Telegraph & Telephone's CEO Ganan,,,, I believe his laat name was), early on sold much telephony and other electronic equipment to Germany prior to the war and during the war years. Of course there was also mention of other companies as well as the mention of world banks etc..
The Ford plant in Cologne, for example, remained largely unscathed throughout the war even as the rest of the city was bombed to ruins. The "hands-off" approach of the U.S. military toward this plant was so blatant that the facility served as an air-raid shelter for the citizens of Cologne during Allied bombing raids.
Ford had already negotiated the "re-acquisition" of this plant before the war was even over -- and the first "post-war" truck rolled off the assembly line on V-E day.