 The CME Group occupies 33 percent of available space, while financial and trading concerns occupy 54 percent of the three-building complex.In addition to Ceres Cafe on the first floor of the lobby, other businesses provide banking, insurance, travel services, beauty services, and healthcare.Some business have been in the building for over 40 years, and throughout its history, commodities speculators, such as "Prince of the Pit" Richard Dennis, have maintained offices in the building.