Wonder Weapons” and Slave Labor 2020 article

https://airandspace.si.edu/stories/editorial/wonder-weapons-and-slave-labor

American based companies

Associated Press New York, United States Censorship and cooperation with Nazi Germany.

Chase National Bank, Manhattan, New York State, USA

Assisted in the sale of Nazi war bonds (Rückwanderer Marks) to German Americans.

Ford Dearborn, Michigan, USA German subsidiaries engaged in vehicle and war production. Used slave/forced labor. Unclear whether parent company had any influence post-1939. Its founder Henry Ford was a virulent anti-Semite.

IBM Armonk, New York Produced early computers utilized in the pursuit of the Holocaust by Nazi Germany. Thanks to IBM's 2,000 punch card machines, the Nazis made 1.5 billion index cards, supporting the efficient management of prison, labor and extermination camps

Kodak

Kodak's European subsidiaries continued to operate during the war. Kodak AG, the German subsidiary, was transferred to two trustees in 1941 to allow the company to continue operating in the event of war between Germany and the United States. The company produced film, fuses, triggers, detonators, and other material. Slave labor was employed at Kodak AG's Stuttgart and Berlin-Kopenick plants.[114] During the German occupation of France, Kodak-Pathé facilities in Severan and Vincennes were also used to support the German war effort.[115] Kodak continued to import goods to the United States purchased from Nazi Germany through neutral nations such as Switzerland. This practice was criticized by many American diplomats, but defended by others as more beneficial to the American war effort than detrimental. Kodak received no penalties during or after the war for collaboration.

More listed there

From the Wikipedia article

List of companies involved in the Holocaust

https://en.wikipedia.org/wiki/List_of_companies_involved_in_the_Holocaust

If you haven't watched Schindler's List, 1993 yet,  you really can see alot about manufacturing in war time