TD Ameritrade is a brokerage firm based in Omaha, Nebraska. The TD stands for Toronto-Dominion, from the name of the companys parent, Toronto-Dominion Bank. TD Ameritrade Holding Corporation is the owner of TD Ameritrade Inc. The company provides online trading services for financial securities including common and preferred stocks, futures, ETFs, option trades, mutual funds, fixed income. It also provides margin lending, and cash management services.