The previously disclosed sale of 34 million shares of Ameritrade stock included some of the holdings of Tom's father, Joe Ricketts, who founded Ameritrade. The sale was completed Friday, Ameritrade said in documents filed with the Securities and Exchange Commission on Monday.
The Ricketts family still controls about 17.7 percent of Ameritrade's stock, but it lost one of its three board seats. So Tom Ricketts, who has represented the family in its bid to buy the Cubs from the Tribune Co., resigned.
Tom Ricketts runs Chicago-based investment bank InCapital LLC.