| Megapro services Trading & Contracting | Conglomerates |
| Megatec Electro Mechanical Engineers & Contractors WLL | Construction |
| Memar Trading & Contracting Company | Construction |
| Mercure Grand Hotel Doha | Leisure and Tourism |
| Mercury Mena Electromechanical | Construction |
| Mesaieed Bakery | Food and Beverages |
| Mesaieed Petrochemical Holding Company Q.S.C. | Oil and Gas |
| Metal Arabia Trading & Contracting Company W.L.L. | Industrial Manufacturing |
| Micron Facility Management | Services |
| Middle East Building Materials Company W.L.L | Industrial Manufacturing |
| Middle East Business Development Co. LLC | Industrial Manufacturing |
| Middle East Cleaning Co | Services |
| Middle East Dredging Company Q.S.C. | Construction |
| Middle East Energy WLL | Conglomerates |
| Milano Travel | Leisure and Tourism |
| Millenium Chauffering WLL | Conglomerates |
| Millennium Travels | Leisure and Tourism |
| Mimar Design Qatar | Construction |
| Ministry of Economy and Commerce - Qatar | Governmental Institutions |
| Ministry Of Environment | Governmental Institutions |
| Ministry of Interior - Qatar | Governmental Institutions |
| Ministry of Municipality and Environment | Governmental Institutions |
| Ministry of Transport and Communications - Qatar | Governmental Institutions |
| Mirage International Property Consultants | Real Estate |
| Mirrikh Contracting WLL | Construction |
