| Data Capture Systems | Services |
| Deco-tech Decorations & Building Materials | Construction |
| Decoration World W.L.L. | Services |
| Decorator | Construction |
| DEIMAJ GROUP W.L.L | Conglomerates |
| Deliopolis WLL | Food and Beverages |
| Delta Group International W.L.L | Information Technology |
| Delta Public Relations | Services |
| Deluxe Trading & Services W.L.L | Consumer Goods |
| Delwan Qatar WLL | Services |
| Depa Qatar Co WLL | Services |
| Derwind Trading & Contracting Company WLL | Construction |
| Design & Consult Bureau | Construction |
| Design 2 Print WLL | Media |
| Deutschland Technology Trading & Contracting | Industrial Manufacturing |
| Developers & Designers | Information Technology |
| Dhafir Switchgear LLC | Industrial Manufacturing |
| Dimensions Engineering Consultant | Construction |
| Direct Freight Solutions | Transport |
| Direct Real Estate | Real Estate |
| Dlala Brokerage and Investments Holding Company Q.P.S.C. | Financial Services |
| Dlala Islamic Brokerage Company (W.L.L) | Financial Services |
| Doha Bank Assurance Company L.L.C. | Financial Services |
| Doha Bank Q.P.S.C. | Financial Services |
| Doha Cables W.L.L | Industrial Manufacturing |
