I think that one of the downsides in increased ownership of securities by passive index funds is the idea that these managers do not do the research to know how to vote. (brooklyninvestor.blogspot.ru)
The shareholder, however, retains the true ownership of the securities. (hsbc.ca)
Even if they stay within these legal ownership limits, very large actively managed fund size inevitably increases the fund's percentage ownership of the securities that it holds. (bestnoloadmutualfund.com)