- Arnold Palmer Hospital for Children
- Arnot Ogden Medical Center
- ARRC Technology
- Arrowhead Regional Medical Center
- Arrowhead United Way
- Arroyo Grande Community Hospital
- Arthritis Foundation Illinois
- Arthroscopy Association of North America
- Arthur Shuster, Inc.
- Arthur Shuster, Inc. - Wichita, KS
- Artie's
- Artman
- ARUP Laboratories
- ASAP Fast
- Asbury Communities
- Asbury Methodist Village
- Ascend Integrated Media
- Ascension Alexian Brothers
- Ascension All Saints Hospital
- Ascension Calumet Medical Center
- Ascension Columbia St. Mary's Hospital Milwaukee
- Ascension Columbia St. Mary's Ozaukee Hospital
- Ascension Elmbrook Memorial Hospital
- Ascension Franklin Hospital
- Ascension Health
- Ascension Kokomo
- Ascension Mercy Aurora Hospital
- Ascension Michigan
- Ascension NE Wisconsin - Mercy Campus
- Ascension Providence
- Ascension Providence
- Ascension Providence
- Ascension Resurrection
- Ascension Sacred Heart Bay
- Ascension Sacred Heart Emerald Coast Hospital
- Ascension Sacred Heart Hospital-St. Mary's Hospital
- Ascension Sacred Heart Pensacola Hospital
- Ascension Saint Mary - Chicago
- Ascension Saint Thomas Three Rivers
- Ascension Saint Vincent's Clay County Hospital
- Ascension Saint Vincent's Riverside Hospital
- Ascension Saint Vincent's Southside Hospital
- Ascension SE Wisconsin Hospital - St. Joseph Campus
- Ascension SE Wisconsin Hospital- St. Joseph Campus
- Ascension Seton
- Ascension Seton Hays
- Ascension Seton Heart Specialty Care and Transplant Center
- Ascension Seton Medical Center Austin
- Ascension Seton Northwest
- Ascension Seton Williamson