| Sentor Electrical Trading | Construction |
| Serve You On System | Information Technology |
| SERVYOND Group, Qatar | Conglomerates |
| Seven Hills Trading & Contracting W.L.L | Construction |
| SEVEN STARS TRADING & GENERAL SERVICES | Conglomerates |
| Severn Glocon Qatar | Conglomerates |
| Shafqat Building Materials WLL | Construction |
| Shaheen Electrical Works & Trading W.L.L | Industrial Manufacturing |
| Shaheen Jewellery WLL | Conglomerates |
| Shannon Engineering Co. | Construction |
| Shaqab Abela Catering Services Company | Food and Beverages |
| Sharq Law Firm | Services |
| Sharq Village & Spa | Leisure and Tourism |
| Shebib & Ali Al-Attiya Company W.L.L. | Industrial Manufacturing |
| Sheen Services | Conglomerates |
| Shepherd Logistics | Transport |
| Sheraton Grand Doha Resort & Convention Hotel | Leisure and Tourism |
| Sherborne School Qatar | Education |
| Shift Group of Companies | Conglomerates |
| Sidra Agriculture Company W.L.L. | Services |
| Sidra Medical and Research Center | Health Care |
| Siemens W.L.L. | Industrial Manufacturing |
| Signet Qatar WLL | Consumer Goods |
| Silatech | Services |
| Silkland Company | Conglomerates |
