A
- Acme Automotive
- Actron
- AGS
- AIRCAT
- Airgas Safety
- Airosol Company
- Airsept
- Ajax Tool Works
- Alert
- All Pro Heater
- AllSource
- Allstart
- Alsa
- Ame International
- American Aimers
- American Forge
- American Line
- American Power Pull
- American Safety Razor
- Amflo
- Ammco / Coats
- Ammex Corporation
- AmPro
- Amprobe
- ANC Global
- ANEST IWATA
- Angel-Guard
- Anglo American
- Ansed Diagnostic Solutions
- Ansell
- AOK Industrial
- Arrow Pneumatic
- Assenmacher
- Associated Equipment
- Astoria 2000
- Astro Pneumatic
- ATEQ
- Atlantic Safety Products
- Atlas Equipment
- Atlas Gove / LFS
- Autel
- Auto Arc
- Auto Body Doctor
- Auto Meter
- Autodata
