Generally such a company's primary listing is on a stock...

Generally such a company's primary listing is on a stock exchange in its country of incorporation, and its secondary listing (s) is/are on an exchange in another country. Cross-listing is especially common for companies that started out in a small market but grew into a larger market. For example, numerous large non-U.S. companies are listed on the New York Stock Exchange or NASDAQ as well as on their respective national exchanges such as Enbridge, BlackBerry Ltd, Statoil, Ericsson, Nokia, Toyota and Sony