They did since the 80s and continue to do so for all their European revenues: https://en.wikipedia.org/wiki/Double_Irish_arrangement https://en.wikipedia.org/wi

They did since the 80s and continue to do so for all their European revenues: https://en.wikipedia.org/wiki/Double_Irish_arrangement https://en.wikipedia.org/wiki/Double_Irish_arrangement A huge part of their $250B stash have never been taxed at all.