- Advantage Capital Corp
- Advantar
- Alan D Bramowitz MD
- Aldrich Funeral Home
- Alexander Graham Bell Cafe
- All About You Tanning Salon
- All State Development Co
- Allan S Armour Moving Co
- Allegheny County Dist Justice
- Allegheny County Housing Auth
- Allegheny Head Start
- Allegheny Intermediate Unit
- Allegheny Plumbing Inc
- Allegheny Podiatry
- Atwood Home Builders Inc
