| Logic Group of Companies | Conglomerates |
| Loons Group WLL | Telecommunications |
| Lotus Trading & Contracting Company | Construction |
| Lotus Travels & Tours | Leisure and Tourism |
| LuLu Center Trading Co. | Retail |
| Lumatron Qatar W.L.L | Industrial Manufacturing |
| Lusail Real Estate Development Company W.L.L. | Real Estate |
| M A Consultants | Industrial Manufacturing |
| M.PALLONJI-QATAR | Construction |
| MACE Qatar WLL | Construction |
| Madina Group W.L.L. | Industrial Manufacturing |
| Magnum Trading & Technical Services WLL | Industrial Manufacturing |
| Maha Al Khaleej For Contracting Co. W.L.L. | Construction |
| Majestic International WLL Qatar | Conglomerates |
| MAKNOON TRADING & CONTRACTING CO. | Construction |
| MaktApp | Information Technology |
| malomatia | Information Technology |
| Man Force Trading & Contracting Company | Services |
| Manasco Trading W.L.L | Conglomerates |
| Mandriva Group Qatar | Construction |
| Mannai Air Travel | Leisure and Tourism |
| Mannai Corporation Q.S.C. | Transport |
| Mansion Trading & Contracting W.L.L | Industrial Manufacturing |
| Manweir W.L.L. | Industrial Manufacturing |
| Maples Safety & Industrial Solutions WLL | Transport |
