- American Business Machines
- American Cancer Society
- American Chemical Society
- American Chemistry Council
- American Chiropractic Association
- American CityVista, LLC
- American Club Championship
- American College of Cardiology
- American College of Chest Physicians
- American College of Clinical Pharmacy
- American College of Emergency Physicians
- American College of Healthcare Executives
- American College of Nurse-Midwives
- American College of Osteopathic Family Physicians
- American College of Osteopathic Surgeons
- American College of Physicians
- American College of Preventive Medicine
- American College of Radiology
- American Composites Manufacturers Association
- American Computer Software, LLC
- American Congress of Rehabilitation Medicine
- American Converters
- American Council of Engineering Companies of Colorado
- American Council of Life Insurers
- American Council of the Blind
- American Council on Education
- American Data
- American Data and Computer Products, Inc.
- American Dental Association
- American Diabetes Association
- American Diabetes Association - Central South Texas Office
- American Dietetic Association
- American Electric Power
- American Exhibition Services
- American Express
- American Express
- American Express
- American Express
- American Express
- American Express Financial Advisors
- American Express Tax and Business Services of Illinois
- American Express Tax and Business Services of Maryland
- American Family Fitness
- American Family Insurance Group
- American Fats and Oils Association
- American Federation of Labor and Congress of Industrial Organizations AFL-CIO)
- American Federation of Teachers Program on Retirement and Retirees AFT)
- American Financial Services Association
- American Fire Sprinkler Association
- American Folding Door Company, Inc