- Vigilancia vecinal "Justice4Hall"
- 100 Black Men of America Inc.
- 172d Airlift Wing
- 1833 Coffee and Tea Co.
- 1st Zamora Corporation
- 21 Wheels
- 360Solutions Group
- 3M
- 3M Pharmaceuticals
- 7-Eleven, Inc.
- 816 Hotel
- 818 Diagnostic Solutions
- 84 Lumber
- A B B B C Doctor's Medical Clinic
- A Direct Connection, Inc.
- A Ride Across America
- A to Z Martin Doors
- A to Z Vending Services, Inc.
- A-Rocket Moving and Storage Inc.
- A. Douglas Smith Jr. Lodge of Research
- A.C. Moore Arts and Crafts Inc.
- A.C. Reynolds High School
- A.C. Reynolds Middle School
- A.C.E. Data Information Service
- A.G. Edwards and Sons, Inc., VA
- A.G. Edwards, NY
- A.T. Still University
- A1 Victory Home Care
- A2D Technologies
- A2Z Inc
- AandC Plastic Products Inc.
- Aardvark Displays
- AARP
- Aavim
- AB Emblem
- Abbeville Area Medical Center
- Abbot Vascular
- Abbott
- Abbott
- Abbott Laboratories
- Abbott Laboratories, Ross Products Division
- Abbott Northwestern Hospital
- Abilene Convention and Visitors Bureau
- Abington - Jefferson Health
- Abington - Lansdale Hospital Jefferson Health
- Abnormal Hearts
- About Publishing
- Abraham Lincoln Memorial Hospital
- Abrazo Arizona Heart Hospital
- Abrazo Arrowhead Campus