Alphabetical company index for letter/character "A", page 42 of 58
- Argyle Independent School District
- Argyle School District
- ARI Network Services Inc.
- Aria Health
- Ariad Pharmaceuticals Inc.
- Ariba Inc.
- Arickaree School District No. R-2
- Aries Maritime Transport Ltd.
- Arise Austin Medical Center
- ARISE Technologies Corporation
- Arista Networks Inc.
- AristoCare
- Ariston Consulting & Technologies
- Aristotle Corp.
- Arizon Companies
- Arizona
- Arizona Land Income Corp.
- Arizona Orthopedic and Surgical Speciality Hosp
- Arizona Spine and Joint Hospital
- Arizona Star Resource Corp.
- Arizona State University-Main
- ARK Restaurants Corp.
- Arkadelphia School District
- Arkansas
- Arkansas Baptist College
- Arkansas Best Corp.
- Arkansas Blue Cross and Blue Shield
- Arkansas Children's Hospital
- Arkansas City School District
- Arkansas County
- Arkansas Heart Hospital
- Arkansas Methodist Medical Center
- Arkansas State University
- Arkansas Surgical Hospital
- Arkansas Tech University
- Arkansas Valley Regional Medical Center
- Arkel International
- Arketi Group
- Arkoma School District
- Arkport Central School District