| Communications Regulatory Authority | Governmental Institutions |
| Communications Regulatory Authority | Governmental Institutions |
| Computer Arabia W.L.L. | Information Technology |
| Computer Arabia W.L.L. | Information Technology |
| Computer World | Conglomerates |
| Computer World | Conglomerates |
| Concorde Hotel Doha | Leisure and Tourism |
| Concorde Hotel Doha | Leisure and Tourism |
| Confidence Engineering and Development Company | Construction |
| Confidence Engineering and Development Company | Construction |
| ConocoPhillips Qatar Ltd | Oil and Gas |
| ConocoPhillips Qatar Ltd | Oil and Gas |
| Conserved Foodstuffs Distribution Company W.L.L. | Food and Beverages |
| Conserved Foodstuffs Distribution Company W.L.L. | Food and Beverages |
| Consolidated Gulf Company | Information Technology |
| Consolidated Gulf Company | Information Technology |
| Construction Commissioning Maintenance Services WLL | Construction |
| Construction Commissioning Maintenance Services WLL | Construction |
| Construction Dynamics LLC | Construction |
| Construction Dynamics LLC | Construction |
| Consulting Engineering Group | Construction |
| Consulting Engineering Group | Construction |
| Container Freight Station | Conglomerates |
| Container Freight Station | Conglomerates |
| Contraco WLL | Construction |
