| Mingei / Shochiku | Shochiku (Mingei / Shochiku) | 1986 | 1 | |
| Mari-Film | Mari-Film | 1919 | 1 | |
| Morosco Company, The | The Morosco Company | 1904 | 3 | |
| Madison Repertory Theatre | Madison Repertory Theatre | 1999 | 1 | |
| Maastrichts Theaterensemble Het Vervolg | Maastrichts Theaterensemble Het Vervolg | 1997 | 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 | |
| Maddermarket Theatre Company | Maddermarket Theatre Company | 2000 - 2002 | 2 | |
| Mofeng she (Windmill Society) | Mofeng she (Windmill Society) | 1935 | 1 | |
| Maison de la culture d’Amiens | Maison de la culture d’Amiens | 2013 | 8 | |
| Münchner Hoftheater-Ensemble | Münchner Hoftheater-Ensemble | 1912 | 1 | |
| MGA Productions Limited | MGA Productions Limited | 1939 | 1 | |
| Maxim Gorki Theater | Maxim Gorki Theater | 1967 - 2012 | 14 | |
| Meßthaler-Ensemble vom Neuen Deutschen Theater München, Das | Das Meßthaler-Ensemble vom Neuen Deutschen Theater München | 1895 | 1 | |
| Mario Michelli | Mario Michelli | 2010 | 1 | |
| Mockingbird Theatre | Mockingbird Theatre | 2000 | 1 | |
| Makhdoomi's Group | Makhdoomi's Group | 2006 | 1 | |
| Mezinárodní festival Divadlo | Mezinárodní festival Divadlo | 2007 | 1 | |
| Manhattan Company | Manhattan Company | 1904 - 1910 | 17 | |
| Montgomery Theatre, The | The Montgomery Theatre | 2011 | 2 | |
| Maurice Campbell's Company | Maurice Campbell's Company | 1905 | 3 | |
| Münchner Kammerspiele (Schauspielhaus) | Münchner Kammerspiele (Schauspielhaus) | 1989 - 2004 | 9 | |
| Melbourne City Council | Melbourne City Council | 1970 - 1980 | 3 | |
| Moskovskij Chudožestvennyj akademičeskij teatr | Moskovskij Chudožestvennyj akademičeskij teatr | 1900 - 1924 | 7 | |
| Malmö City Theatre | Malmö City Theatre | 1951 | 1 | |
| Masquers | Masquers | 2003 | 1 | |
| Městské divadlo v Táboře | Městské divadlo v Táboře | 1924 | 1 | |
| Münchener Dramatische Gesellschaft | Münchener Dramatische Gesellschaft | 1900 | 2 | |
| Metropolitan Players, The | The Metropolitan Players | 1912 - 1913 | 3 | |
| Marco Maltauro's Enemle | Marco Maltauro's Enemle | 1994 | 1 | |
| Móricz Zsigmond Színház | Móricz Zsigmond Színház | 1995 | 2 | |
| Melbourne Festival | Melbourne Festival | 2011 - 2012 | 2 | |
| Melafestivalen | Melafestivalen | 2012 | 1 | |
| Museo Deseo | Museo Deseo | 2006 | 1 | |
| Musica Independent Theatre Group, La | La Musica Independent Theatre Group | 2009 - 2013 | 17 | |
| Mariinsky Theatre Chorus | Mariinsky Theatre Chorus | 2005 | 1 | |
| Melbourne Theatre Company | Melbourne Theatre Company | 1970 - 1998 | 15 | |
| Mecklenburgisches Staatstheater Schwerin | Mecklenburgisches Staatstheater Schwerin | 1994 - 2005 | 4 | |
| Moskva Kunstnerteater | Moskva Kunstnerteater | 1905 | 3 | |
| Munroe Park Theater Guild, The | The Munroe Park Theater Guild | 2001 | 1 | |
| Melbourne Fringe Festival | Melbourne Fringe Festival | 2011 | 1 | |
| Mary Shaw Company | Mary Shaw Company | 1903 | 3 | |
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