50 years ago the two top companies in that list had just started defending expensive and long-running antitrust cases. IBM changed its behaviour to settle these

50 years ago the two top companies in that list had just started defending expensive and long-running antitrust cases. IBM changed its behaviour to settle these cases, transforming the computer industry, and in AT&T’s case the litigation led directly to the breakup of the company. These companies didn’t lose market share “organically.”