| Maltauro, Marco | Marco Maltauro | Actor, Adaptation, Director, Translator | 1993 - 1994 | 7 | 1 |
| Maniu, Adrian | Adrian Maniu | Translator | 1959 - 1994 | 4 | 1 |
| Mann, Emily | Emily Mann | Actor, Director | 1979 - 1996 | 4 | 1 |
| Manthey, Simone | Simone Manthey | Designer | 1998 - 2016 | 5 | 1 |
| Marciniakówna, Anna | Anna Marciniakówna | Translator | 2006 - 2025 | 43 | 1 |
| Margulies, Pär | Pär Margulies | Actor | 1985 - 1990 | 3 | 1 |
| Maria, Lucia | Lucia Maria | Actor | 2007 - 2008 | 6 | 1 |
| Marini, Giuseppe | Giuseppe Marini | Actor, Adaptation, Director | 1994 - 2023 | 50 | 1 |
| Marker, Lise-Lone | Lise-Lone Marker | Translator | 1972 - 2018 | 15 | 1 |
| Marko-Nord, Julia | Julia Marko-Nord | Actor | 2007 | 1 | 1 |
| Marlowe, Dorine | Dorine Marlowe | Actor | 1934 | 1 | 1 |
| Martin, Harald | Harald Martin | Designer | 1954 - 1973 | 8 | 1 |
| Marton, László | László Marton | Director | 2001 - 2005 | 5 | 1 |
| Marx-Aveling, Eleanor | Eleanor Marx-Aveling | Translator | 1891 - 2010 | 7 | 1 |
| Mason, Dan | Dan Mason | Actor | 1996 - 2013 | 4 | 1 |
| Massey, Hart | Hart Massey | Actor | 2000 | 1 | 1 |
| Matthews, Helen | Helen Matthews | Actor | 1884 | 1 | 1 |
| Matthiae, Oliver | Oliver Matthiae | Actor | 2002 - 2008 | 16 | 1 |
| Matthias, Marina | Marina Matthias | Actor | 1997 - 2006 | 8 | 1 |
| Mattsson, Per | Per Mattsson | Actor | 1989 - 1998 | 15 | 1 |
| Matus, Michael | Michael Matus | Actor | 2005 | 1 | 1 |
| Matysová, Milada | Milada Matysová | Actor | 1939 - 1954 | 3 | 1 |
| Mauer, Lubo | Lubo Mauer | Producer, Translator | 1975 - 1976 | 4 | 1 |
| Mauhs, Else | Else Mauhs | Actor | 1925 - 1928 | 2 | 1 |
| Maxwell, Jan | Jan Maxwell | Actor | 1997 | 1 | 1 |
| Mbewe, Mbumba | Mbumba Mbewe | Actor | 2006 | 23 | 1 |
| McCarthy, Eoin | Eoin McCarthy | Actor | 2000 - 2003 | 2 | 1 |
| McDonald-Lewis, Mary | Mary McDonald-Lewis | Director | 2007 | 1 | 1 |
| McDonnell, Colleen | Colleen McDonnell | Actor | 2007 | 1 | 1 |
| McFarlane, James Walter | James Walter McFarlane | Translator | 1961 - 2012 | 18 | 1 |
| McHallem, Christopher | Christopher McHallem | Actor | 1992 | 3 | 1 |
| McKintosh, Peter | Peter McKintosh | Designer | 2003 - 2007 | 4 | 1 |
| McLeish, Kenneth | Kenneth McLeish | Adaptation, Translator | 1990 - 2015 | 35 | 1 |
| McMahon, Charles | Charles McMahon | Actor, Director | 1999 - 2005 | 2 | 1 |
| McRae, Bruce | Bruce McRae | Actor | 1905 - 1908 | 7 | 1 |
| Medina, Kristopher | Kristopher Medina | Actor | 2003 - 2011 | 35 | 1 |
| Mehrjui, Dariush | Dariush Mehrjui | Director, Producer | 1993 - 2014 | 4 | 1 |
| Mejlænder-Hellesen, Marie | Marie Mejlænder-Hellesen | Actor | 1891 - 1921 | 16 | 1 |
| Melander, Björn | Björn Melander | Adaptation, Director | 1999 - 2008 | 6 | 1 |
| Melldahl, Åsa | Åsa Melldahl | Director | 2000 - 2007 | 3 | 1 |
| Menelaus, Jane | Jane Menelaus | Actor | 1989 | 1 | 1 |
| Menzies, Robert | Robert Menzies | Actor | 1988 - 2017 | 5 | 1 |
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