- Duane Morris
- Duggan Rhodes Group
- Dunbar Bender & Zapf
- DUQUESNE Light Holdings Inc
- Duquesne Litho Inc
- Duquesne Quick Copy
- Duquesne University Bookstore
- Duquesne University Bookstore
- Duquesne Unn Tamburitzans
- Dustin Pickens
- Dwelling House Savings & Loan
- E Diane Blandino DDS
- E E Powell & Co
- E J Truschel Co
- E Z Consulting Group LLC
- Eadie's Kitchen & Market
- Eagle Cab Co
- Earl D Childs DDS
- East House
