as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
how do you find out who the investors are in a u.s. stock? e.g. how ownership may be concentrated?
user
i don't think that you will be able to find a list of every owner for a given stock. there are probably very few people who would know this. one source would be whoever sends out the shareholder meeting mailers.  i suspect that the company itself would know this, the exchange to a lesser extent, and possibly the brokerage houses to a even lesser extent. consider these resources:
assistant