- Acro Pharmaceutical Services
- ACT The App Association
- Actinium Healthcare Holdings
- Activate Venture Partners
- Active Day
- Activity Daily Living
- Acumen Research and Consulting
- Ad Council
- Adams Street Partners
- Adapt
- AdaptHealth
- AdaptHealth LLC
- Addison Care
- Addison County Home Health and Hospice
- Addus
- Addus HomeCare
- Addus HomeCare Corp.
- Addus HomeCare Corporation
- Adduse HomeCare Inc.
- AdhereHealth