| Masar Association |
| Masimo Corporation |
| Masraf Al Rayan Q.P.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. |
| MasterTherm UK |
| Matamba Film Labs Trust |
| Matchstick Men Group Limited |
| Matrix Chambers Limited |
| Maxeon Solar Technologies, Ltd. |
| Maxingvest ag |
| Mazzoleni Galleria D'Arte SRL |
| MC Aviation Partners |
| Meazure Learning |
| Media Reach Advertising Limited |
| Media Reach Group |
| Mediareach Star Limited |