> A new CEO for sure.

And therein lies the problem.

Zuckerberg's turned the retirement funds into patsies. They have two options: exit their positions for something else, or hold water for him with regulators and the legal system while having no ability to fundamentally change the company due to the fact that he holds majority voting control.

Disinvestment creates the possibility of a stampede for the exit. If one major institutional shareholder starts to sell off, all of them might start to sell off, and there might not be any good paths out for the later sellers.