- Abbott Laboratories
- American Bar Association - Section of Litigation
- American Crop Protection Association
- American Medical Association
- Apple Computer Inc.
- ARAMARK
- ASCO Sintering
- Association for a Better New York
- Atlanta Olympic Organizing Committee
- Baxter International Inc.
- BEA Systems, Inc.
- BellSouth Corporation
- BFI: Browning Ferris Industries, Inc.
- Robert Bosch Corporation
- Canandaigua Wine Company, Inc.
- Catalyst
- Caterpillar Inc.
- Catholic Charities of the Archdiocese of Chicago
- Chase
- The Cimarron Group
- City of Bakersfield, California
- CNA Insurance Companies/CNA Financial Corporation
- The Coca-Cola Company
- Coca-Cola Enterprises Inc.
- Delta Air Lines Inc.
- EQ, The Environmental Quality Company
- Hanes
- Hines
- HSBC
- International Crane Foundation
- ISR: International Survey Research LLC
- JMB Insurance Agency, Inc.
- Keebler Company
- Lakefront SRO Corporation
- Jenner & Block
- Jones Lang LaSalle Inc.
- La Petite Academy, Inc.
- Lincoln Park Zoo
- McDonald's Corporation
- Metropolitan Planning Council of Chicago
- Midwest Theological Forum
- Monsanto Company
- Novartis
- The Museum of Broadcast Communications
- Navistar International Corporation
- Nortel Networks Corporation
- Ogilvy Public Relations Worldwide
- The Fifield Companies
- The James A. Baker III Institute - of Rice University
- The Pleasant Company - a Division of Mattel
- PRISM
- The Quaker Oats Company
- Rogers Seed Company
- SAE/Societe Auxiliaire D'Enterprises
- Sandoz Agro
- Sara Lee Corporation
- Shell Oil Company
- Tasmania
- United Way
- Wal-Mart Stores Inc.
- Wellmark, Inc.
- Westfield Corporation