| Mandriva Group Qatar | Construction |
| Mannai Air Travel | Leisure and Tourism |
| Mannai Air Travel | Leisure and Tourism |
| Mannai Corporation Q.S.C. | Transport |
| Mannai Corporation Q.S.C. | Transport |
| Mansion Trading & Contracting W.L.L | Industrial Manufacturing |
| Mansion Trading & Contracting W.L.L | Industrial Manufacturing |
| Manweir W.L.L. | Industrial Manufacturing |
| Manweir W.L.L. | Industrial Manufacturing |
| Maples Safety & Industrial Solutions WLL | Transport |
| Maples Safety & Industrial Solutions WLL | Transport |
| Maples Safety & Industrial Solutions WLL Qatar | Construction |
| Maples Safety & Industrial Solutions WLL Qatar | Construction |
| Marafeq Qatar Company | Power and Utilities |
| Marafeq Qatar Company | Power and Utilities |
| Marbu Contracting Company W.L.L. | Construction |
| Marbu Contracting Company W.L.L. | Construction |
| Marriott Marquis City Center Doha Hotel | Leisure and Tourism |
| Marriott Marquis City Center Doha Hotel | Leisure and Tourism |
| Mars Trading & Contracting Company | Consumer Goods |
| Mars Trading & Contracting Company | Consumer Goods |
| Marshal Shipping & Logistics | Transport |
| Marshal Shipping & Logistics | Transport |
| Marubeni | Power and Utilities |
| Marubeni | Power and Utilities |
