It's funny you'd pick IBM:

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

Though, I guess IBM did get away with lots of stuff that... Actually, did any supply companies in the WWII German war machine actually get in trouble for war crimes, or did they just go after officers and the people actually working in the camps?

The company selling punchcards that were used for logistics was apparently fine. What about the people making the gas canisters, or supplying plumbing fixtures? The plumbers? Where's the line?

Wondering, since this is increasingly becoming a current events question instead of an academic concern.