On Jan. 28, 2021, a Robinhood user filed the first lawsuit against Robinhood, alleging that it prevented users from buying GameStop's stock "in the midst of an unprecedented stock rise," allegedly "depriv(ing) retail investors of the ability to invest in the open-market and manipulating the open-market." The plaintiff claimed that this was designed to manipulate the market. However, other trading platforms, including TD Ameritrade and Ally Financial, have been sued alongside Robinhood over the incident.