Eric Stephen O'Keefe is an American political activist. In the 1990s, O'Keefe was involved in efforts to enact congressional term limits. He is involved as a strategist, board member, and donor with a number of organizations which seek to advance limited government and self-governance.

John Joseph Ricketts is an American billionaire businessman. He is the founder, former CEO and former chairman of TD Ameritrade. He has an estimated net worth of US$4.1 billion As of 2024 according to Forbes. He has pursued a variety of other business ventures including DNAinfo.com, High Plains Bison, The Lodge at Jackson Fork, and The American Film Company. Ricketts also engages in philanthropy through The Ricketts Art Foundation, Opportunity Education Foundation, The Cloisters on the Platte Foundation, and The Ricketts Conservation Foundation. He and his family have been the owners of the Chicago Cubs Major League Baseball team since October 2009.