| MannionDaniels Holdings Limited |
| Manpower Tunisie |
| MAPS International WLL |
| Marigat Gold |
| Marks & Spencer Group plc |
| Marlin Bidco Limited |
| Marlin Management Company, LLC |
| Mars Chocolate North America |
| Mars Inc |
| Mars Petcare UK Ltd |
| Marston's plc |
| Marvi Mazhar & Associates |
| Masar Association |
| Masimo Corporation |
| Masraf Al Rayan (MAR) Q.S.C. |
| Massachusetts Institute of Technology |
| Massachusetts Mutual Life Insurance Company [OR: MassMutual] |
| Massimo Dutti |
| Massimo Zanetti Industries SA |
| Master Trust Bank of Japan |
| Master Trust Bank of Japan, Ltd |
| Mastercard Foundation |
| Mastercard Incorporated |
| Mastertech Serviços de Treinamento Profissional Ltda |
| MasterTherm SK s.r.o. |