Depends on the size of the company.
Since you own stock in them, tell me when is the last time they asked you to vote for much of anything more then the board members?
Do you remember seeing the vote to add the phone bill payment method for example? How much of a say did you have with the negotiations with thenine and/or netease, which have a far bigger impact on the company and revenues then adding a payment method.
Well that's why I said indirectly. A shareholder speaks with their wallet. If I disagree with ATVI's vision, I sell. Same as any other shareholder, institutional or otherwise.