The Toronto-Dominion Bank (the Bank) is a Canadian bank. The Bank and its subsidiaries are collectively known as TD Bank Financial Group (TDBFG). The Bank serves approximately 17 million customers in four segments: Canadian Personal and Commercial Banking, including TD Canada Trust and TD Insurance; Wealth Management, including TD Waterhouse and an investment in TD AMERITRADE Holding Corporation (TD Ameritrade); U.S. Personal and Commercial Banking, including TD Bank, America's Most Convenient Bank, and Wholesale Banking, including TD Securities. The Bank also acts as online financial services firm, with more than 5.5 million online customers. On June 11, 2009, TD Waterhouse Canada Inc., a subsidiary of the Bank, acquired thinkorswim Canada, Inc., an online options trading brokerage.