- Aerotech Inc
- Aetos Construction Co
- Agrecycle Inc
- Aiken Internal Medicine & Endo
- Air Compliance Consultant Inc
- Air Pro
- Air Pro Heating & Cooling
- Air-Pro Heating & Cooling
- Air-Scent Intl
- Airline Hydraulics
- Airline Hydraulics
- Alan Kells School Of Real Est
- Alan P Molitor PHD
- Albrecht Electric
- Alexander's Athletic Club
- Allegheny Container
- Allegheny Container
- Allegheny Fire Equipment Inc
- Allegheny General Hospital
- Allegheny Group
- Allegheny Marketing Products
- Allegheny Marking Products Co
- Allegheny Mental Hlth Assoc
- Allegheny Radiology Assoc
- Allegheny Smokeworks
- Allegheny Valley Bank
- Allegheny VALLEY Fcu
- Allegheny Valley Inc
- Allegheny Valley Sewage Auth
