| Saleh Al Hamad Al Mana Company | Transport |
| Salem Trading Centre | Consumer Goods |
| Saltos Trading & Contracting | Conglomerates |
| Sama Properties | Conglomerates |
| Samba Financial Group - Qatar | Financial Services |
| Samko International Co. WLL | Conglomerates |
| Sarplast Qatar W.L.L. | Industrial Manufacturing |
| Sarvika and Company Qatar | Construction |
| Satal Qatar Contracting W.L.L. | Construction |
| Scientific & Technical Services Company W.L.L | Health Care |
| Sea Gulf Trading & Contracting WLL | Construction |
| Sealand Marine Services Qatar | Conglomerates |
| Sealine Beach Resort | Leisure and Tourism |
| Sealine Manpower Recruitment | Services |
| Season Engineering Group | Services |
| Seattle Trading and Contracting Company W.L.L | Conglomerates |
| Seaworks Company | Construction |
| Security - Safety & Trading Center | Industrial Manufacturing |
| Seebeck International Trading Company W.L.L | Industrial Manufacturing |
| Seef Limited Q.S.C. | Oil and Gas |
| SEIB Insurance & Reinsurance Company LLC | Financial Services |
| Seko Logistics | Transport |
| Self Drive Car Rental WLL | Transport |
| SEMAC QATAR W.L.L | Services |
| Sendian Group | Conglomerates |
