<a href="http://beginnersinvest.about.com/lw/Business-Finance/Personal-finance/American-Depositary-Receipts-ADRs.htm" rel="nofollow" target="_blank">http://beginnersinvest.about.com/lw/Business-Finance/Personal-finance/American-Depositary-Receipts-ADRs.htm</a> Unsponsored shares: These offer the lowest level of entry into the American market. Unsponsored shares trade only on over-the-counter markets - not on the major US stock exchanges - and bear no responsibility to report to US regulatory agencies. They are rarely issued today.