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.
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can a company block a specific person from buying its stock?
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a more serious problem: how do you know who's really buying your stock? "shell companies" are an increasingly obvious problem in corporate and tax accountability. there are jurisdictions where companies can be created with secret lists of directors and shareholders. if stock is bought by one of these companies, it is very hard to trace it to a particular individual.
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