Margaret Thatcher (in)famously said that there was no such thing as society. By that she meant that, actually the only thing out there is individuals looking after their own self-interests. Well, it is the same with companies. In both case this leads to suboptimal results at 'system level' (a well-known problem in system optimisation).
But the name for the 'system level' of a collection of interacting individual humans would be ... society.
Her statement is also deeply incorrect that individuals are solely interest-driven -- they're also value driven (though I suspect like many effective politicians she damn well knew that regardless of what she said). Of course, with companies, her statement is significantly more apt.