| Mafham, Dominic | Dominic Mafham | Actor | 1991 - 2014 | 2 | 1 |
| Marx, Doris | Doris Marx | Actor | 1977 - 1991 | 2 | |
| Myrow, Shira | Shira Myrow | Actor | 1993 | 2 | |
| Maradudin, Peter | Peter Maradudin | Lighting Designer | 1993 | 2 | |
| Moore, Sophie | Sophie Moore | Actor | 1991 - 1992 | 2 | |
| Manchen, Klaus | Klaus Manchen | Actor | 1993 - 1996 | 2 | 1 |
| Maciejewska, Magdalena | Magdalena Maciejewska | Actor, Designer | 1991 - 1999 | 2 | |
| Molnár, Judit | Judit Molnár | Actor | 1991 - 2006 | 2 | |
| McGuire, William, Francis | William Francis McGuire | Actor | 1993 | 2 | |
| Mesterházy, Gyula | Gyula Mesterházy | Actor | 2004 - 2006 | 2 | |
| McKinney, Alisha | Alisha McKinney | Actor | 1994 - 2002 | 2 | |
| Mello, José Augusto | José Augusto Mello | Lighting Designer | 1982 | 2 | |
| McWhinnie, Donald | Donald McWhinnie | Director | 1959 - 1982 | 2 | 1 |
| Murray, Jane | Jane Murray | Actor | 1982 | 2 | 1 |
| Milojevic, Alexander | Alexander Milojevic | Designer | 1980 - 1982 | 2 | |
| Marquardt, Fritz | Fritz Marquardt | Director | 1982 - 1995 | 2 | 1 |
| Mentz, Arthur | Arthur Mentz | Actor | 1952 - 1982 | 2 | |
| Modschiedler, M. | M. Modschiedler | Actor | 1982 | 2 | |
| Martinos, Giorgos | Giorgos Martinos | Assistant Director | 2014 - 2015 | 2 | |
| Matull, Oskar | Oskar Matull | Actor | 1980 - 1997 | 2 | |
| Midgley, Robin | Robin Midgley | Director | 1969 - 1980 | 2 | 1 |
| McKeown, Fintan | Fintan McKeown | Actor | 1980 - 2010 | 2 | |
| Morick, Jeanine | Jeanine Morick | Actor | 1980 | 2 | |
| Marshall, William, Horace | William Horace Marshall | Actor | 1980 | 2 | 1 |
| Mink, David | David Mink | Actor | 1980 | 2 | |
| Moore, Andrew | Andrew Moore | Actor | 1980 | 2 | |
| Mosher, Gregory | Gregory Mosher | Director | 1980 | 2 | 1 |
| Mantle, Doreen | Doreen Mantle | Actor | 1975 - 2011 | 2 | 1 |
| Morrison, Conall | Conall Morrison | Director | 2000 - 2003 | 2 | 1 |
| McIntyre, Colin | Colin McIntyre | Director | 1969 - 1980 | 2 | |
| Molinari, Renata | Renata Molinari | Adaptation | 1994 - 1996 | 2 | |
| Moretti, Maria | Maria Moretti | Actor | 1994 | 2 | |
| Maurina, Franco | Franco Maurina | Composer | 1994 | 2 | |
| McCall, Nick | Nick McCall | Lighting Designer | 1993 - 1994 | 2 | |
| Minegishi, Shintaro | Shintaro Minegishi | Actor | 1992 - 1994 | 2 | |
| Mori, Ryu | Ryu Mori | Adaptation, Director | 1994 | 2 | |
| Meyer, Doris | Doris Meyer | Actor | 1962 - 1997 | 2 | |
| McKereghan, Dan | Dan McKereghan | Adaptation, Director | 1997 | 2 | 1 |
| Mäkinen, Veikko | Veikko Mäkinen | Designer | 1966 - 1980 | 2 | |
| Murphy, Rosemary | Rosemary Murphy | Actor | 1980 - 1999 | 2 | 1 |
| Matthus, Frank | Frank Matthus | Director | 1996 - 1998 | 2 | |
| Mattson, Kalle | Kalle Mattson | Actor, Musician | 1996 | 2 | 1 |
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