- Advanced Headache Treatment
- Advanced Metallurgical Coating
- Advanced Metallurgical Coating
- Aero Engineering
- Affirmative Enterprises Inc
- Aggressive Grinding Svc Inc
- Agressive Grinding Svc
- AIG Financial Advisors
- Aileron Salon & Spa
- Albert Chenet Insurance
- Alfred J Ferraro Accounting
- All American Grill
- All American Sports Enterprise
- All Pro Recon & Upholstery
- All State Marine Sales Inc
- Allegheny Energy
- Allegheny Ludlum Corp
