- Advanced Wireless
- Advanta Homes
- Aero National Inc
- Aeropostale
- Agchoice Farm Credit Aca
- Air Charter Svc Inc
- Al Lorenzi Building Products
- Al Roach Insulation
- Al Rogers & Sons Auto Repair
- Al Sten's Auto Svc
- Albano's Wholesale Produce
- Albert Gllatin Hm Health Care
- Alcoholics Anonymous
- Alfano's At The Quail
- Alfano's Main Street Deli
- Alison's Bridal
- All American Constr & Tree Svc
- All Craft Exteriors Inc
- All Kontrol Exterminating Co
- All Star Express
- All Star Fabricating & Welding
- All Ways Moving & Storage
- Allan's Auto Clean
- Allcare Dental & Dentures
- Allegheny Chimney Sweep
- Allegheny Ludlum Corp
- Allegheny Ludlum Steel Jessop
