| Mallinson Architects & Engineers LTD |
| Mama Bamboo Ltd |
| Manchester International Festival (Factory International) |
| Manchester Metropolitan University |
| Mandala Theatre Company CIC |
| Mango Telecom Ltd |
| Mangosuthu University of Technology (MUT) |
| Manjushree Technopack Limited |
| MannionDaniels Holdings Limited |
| Manpower Tunisie |
| MAPS International WLL |
| Marigat Gold |
| MaritimEA Research |
| Marks & Spencer Group plc |
| Marlin Bidco Limited |
| Mars Chocolate North America |
| Mars Inc |
| Mars Petcare UK Ltd |
| Marston's plc |
| Marvi Mazhar & Associates |
| Masar Association |
| Masimo Corporation |
| Masraf Al Rayan Q.P.S.C. |
| Massachusetts Institute of Technology |
| Massachusetts Mutual Life Insurance Company [OR: MassMutual] |