- AI Group
- Aiken Regional Medical Center
- AIKO
- AIM, Inc.
- Ainahau O Kaleponi Hawaiian Civic Club
- Air Conditioning Contractors of America
- Air Force Association
- Air Force Enlisted Village
- Air Force Information Warfare
- Air Line Pilots Association International
- Air Master
- Air Methods Corp.
- Air-Conditioning and Refrigeration Institute
- Airport Consultants Council
- Airport Plaza Hotel Seattle
- AIS
- Ajilon
- Akoya
- Akron Children's Hospital
- Akron General Medical Center
- Akron Racers Foundation
- Alabama Campaign to Prevent Teen Pregnancy
- Alabama Council of Association Executives
- Alabama Department of Public Health, Office of Primary Care and Rural Health
- Alabama Gulf Coast CVB
- Alabama HOSA
- Alabama Hospital Association
- Alachua County Sheriff Office
- Alachua County Visitors and Convention Bureau
- Alamance County
- Alamance Regional Medical Center
- Alamed-Pulmonary Care Services
- Alameda Health System
- Alameda Hospital
- Alamo Industrial
- Alaska Department of Health and Social Services, Division of Behavioral Health
- Alaska Department of Health and Social Services, Division of Public Health
- Albany Medical Center
- Albany Memorial Hospital
- Albany Memorial Hospital Auxiliary
- Albany Technical College
- Albemare Area United Way
- Albert Gallatin Home Care and Hospice
- Albertine Enterprises
- Albertson's
- Albertson's Inc. Eastern Division)
- Albertsons
- Albertsons
- Albright Care Services
- Albuquerque Convention and Visitors Bureau