| Doha Hydraulic Services | Conglomerates |
| Doha Hydraulic Services WLL | Industrial Manufacturing |
| Doha Industrial Safety Services | Education |
| Doha Institute for Graduate Studies | Education |
| Doha Insurance Company (Q.S.C.) | Financial Services |
| Doha International Family Institute | Services |
| Doha International For Infrastructure Company | Construction |
| Doha Kwik Span for Metal Works Company W.L.L. | Industrial Manufacturing |
| Doha Marketing Services Company W.L.L. | Transport |
| Doha Pest Control & Cleaning Co. W.L.L | Services |
| Doha Petroleum Construction Company Limited | Industrial Manufacturing |
| Doha Project Trading & Services W.L.L | Industrial Manufacturing |
| Doha Star Trading Co. W.L.L. | Consumer Goods |
| Doha Switchgear Electromechanical Company | Construction |
| Doha Team Trading | Industrial Manufacturing |
| Doha Technical Laboratories | Health Care |
| Doha Technical Laboratories ( DTL ) Qatar | Services |
| Dolphin Construction Co WLL | Conglomerates |
| Dolphin Est | Conglomerates |
| Dolphin Group WLL | Services |
| Dolphin Trading & Logistics W.L.L. | Transport |
| Domopan Qatar WLL | Construction |
| Draieh Contracting W.L.L. | Construction |
| Draieh Logistics Services Company W.L.L. | Transport |
| Dreamstan Tours Wholesaler W.L.L. | Leisure and Tourism |
