High Quality Content by WIKIPEDIA articles! The Toronto Stock Exchange (TSX), a subsidiary of the TMX Group Inc., is the largest stock exchange in Canada, the third largest in North America and the eighth largest in the world by market capitalization. Based in Canada's largest city, Toronto, it is owned and operated by TMX Group for the trading of senior equities. A broad range of businesses from Canada, the United States, Europe, and other countries are represented on the exchange. In addition to conventional securities, the exchange lists various exchange-traded funds, split share corporations, income trusts and investment funds.