| MedEsole W.L.L. | Health Care |
| Medgulf Construction Company (W.L.L.) | Construction |
| Media Point Advertising Trading Company | Media |
| Medicare Group Q.S.C. | Health Care |
| MEEZA QSTP LLC | Information Technology |
| Mega E&M Trading and Contracting L.L.C. | Construction |
| Mega Rent a Car | Transport |
| 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 |
