| Mme Vera F Komisarzhevskaya Repertory | Mme Vera F Komisarzhevskaya Repertory | 1908 | 1 | |
| Marked for Scenekunst | Marked for Scenekunst | 2001 | 1 | |
| Mauthner-Ensemble | Mauthner-Ensemble | 1894 | 1 | |
| Mingei / Shochiku | Shochiku (Mingei / Shochiku) | 1986 | 1 | |
| Mari-Film | Mari-Film | 1919 | 1 | |
| Meininger Musikverein | Meininger Musikverein | 1920 | 1 | |
| Mask and Dagger Club Washington State College, The | The Mask and Dagger Club Washington State College | 1916 | 1 | |
| Madison Repertory Theatre | Madison Repertory Theatre | 1999 | 1 | |
| Maastrichts Theaterensemble Het Vervolg | Maastrichts Theaterensemble Het Vervolg | 1997 | 1 | |
| Münchner Hoftheater-Ensemble | Münchner Hoftheater-Ensemble | 1912 | 1 | |
| Mofeng she (Windmill Society) | Mofeng she (Windmill Society) | 1935 | 1 | |
| Mario Michelli | Mario Michelli | 2010 | 1 | |
| MGA Productions Limited | MGA Productions Limited | 1939 | 1 | |
| Meßthaler-Ensemble vom Neuen Deutschen Theater München, Das | Das Meßthaler-Ensemble vom Neuen Deutschen Theater München | 1895 | 1 | |
| Mezinárodní festival Divadlo | Mezinárodní festival Divadlo | 2007 | 1 | |
| Mockingbird Theatre | Mockingbird Theatre | 2000 | 1 | |
| Makhdoomi's Group | Makhdoomi's Group | 2006 | 1 | |
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