| Matrix International Contracting Company W.L.L. | Services |
| Mayan Design | Construction |
| Mayan Design | Construction |
| Mayhoola for Investment LLC | Financial Services |
| Mayhoola for Investment LLC | Financial Services |
| Maysaloon Engineering | Industrial Manufacturing |
| Maysaloon Engineering | Industrial Manufacturing |
| Mazars Ahmed Tawfik & Company Certified Public Accountants | Financial Services |
| Mazars Ahmed Tawfik & Company Certified Public Accountants | Financial Services |
| Mazaya Qatar Real Estate Development Q.S.C | Real Estate |
| Mazaya Qatar Real Estate Development Q.S.C | Real Estate |
| McNair Chambers - Qatar | Services |
| McNair Chambers - Qatar | Services |
| MCT Pest Control | Services |
| MCT Pest Control | Services |
| MEBS International | Services |
| MEBS International | Services |
| Mechanical Electrical Plumbing Enterprises W.L.L. | Construction |
| Mechanical Electrical Plumbing Enterprises W.L.L. | Construction |
| Mechanical Engineering Workshop Company WLL | Industrial Manufacturing |
| Mechanical Engineering Workshop Company WLL | Industrial Manufacturing |
| MechaTronics W.L.L | Construction |
| MechaTronics W.L.L | Construction |
| Mechel Engineering W.L.L | Construction |
| Mechel Engineering W.L.L | Construction |
