For years, the world’s biggest technology companies were largely able to resist government oversight. That’s changing fast.

EU antitrust chief Margrethe Vestager scored two major wins on Tuesday as Europe's top court backed her crackdown against Apple's Irish tax deal and Google's anti-competitive practices in two landmark cases.

The Google case is largely about antitrust law, while the Apple case centers on the European Union’s ability to intervene in areas of tax policy in one of its member nations.