| Marshall, E.G. | E.G. Marshall | Actor | 1960 - 1980 | 3 | 1 |
| Mühe, Ulrich | Ulrich Mühe | Actor | 1979 - 2006 | 5 | 1 |
| Mathesius, Bohumil | Bohumil Mathesius | Adaptation, Translator | 1941 - 2007 | 23 | 1 |
| Morris, Peter | Peter Morris | Actor | 1961 - 1973 | 2 | 1 |
| Mason, Marshall W. | Marshall W. Mason | Director, Lighting Designer | 1964 - 1973 | 2 | 1 |
| Müller, Hans-Reinhard | Hans-Reinhard Müller | Actor, Director | 1975 - 1979 | 3 | 1 |
| Matisová, Gita | Gita Matisová | Costume Designer | 1973 | 1 | 1 |
| Marowitz, Charles | Charles Marowitz | Adaptation, Director | 1978 - 1990 | 12 | 1 |
| Mayer, Kit | Kit Mayer | Designer, Lighting Designer | 2006 - 2014 | 10 | 1 |
| Meyer-Fürst, Gustl | Gustl Meyer-Fürst | Actor | 1981 - 2007 | 6 | 1 |
| Meinhardt, Thomas | Thomas Meinhardt | Actor | 1981 - 2010 | 3 | 1 |
| Morahan, Christopher | Christopher Morahan | Director | 1958 - 1979 | 3 | 1 |
| Mikiver, Mikk | Mikk Mikiver | Actor, Director | 1962 - 1999 | 7 | 1 |
| Meinholtz, Rolland | Rolland Meinholtz | Director | 1972 | 1 | 1 |
| Morita, Sohei | Sohei Morita | Translator | 1913 - 1940 | 3 | 1 |
| Manninen, O. | Otto Manninen | Translator | 1916 - 1967 | 4 | 1 |
| Mikes, Lajos | Lajos Mikes | Translator | 1927 - 1944 | 4 | 1 |
| Miller, Martha | Martha Miller | Actor | 1983 | 1 | 1 |
| Martyn, Greg | Greg Martyn | Actor | 1983 | 2 | 1 |
| McCloskey, Steven | Steven McCloskey | Actor | 1983 | 6 | 1 |
| McRobbie, Peter | Peter McRobbie | Actor | 1966 - 1992 | 9 | 1 |
| Munzar, Ludĕk | Ludĕk Munzar | Actor | 1964 - 1994 | 11 | 1 |
| Mirbach, Ingrid | Ingrid Mirbach | Actor | 1983 - 1984 | 2 | 1 |
| Munch-Møller, Asger | Asger Munch-Møller | Actor, Translator | 1983 - 1990 | 3 | 1 |
| Markovičová, M. | M. Markovičová | Actor | 1955 | 1 | 1 |
| Machata, Karol | Karol Machata | Actor | 1983 | 1 | 1 |
| Magálová, Kamila | Kamila Magálová | Actor | 1972 - 1983 | 2 | 1 |
| Mazalová, Gita | Gita Mazalová | Actor | 1993 | 1 | 1 |
| Morley, Christopher | Christopher Morley | Costume Designer, Designer | 1983 | 2 | 1 |
| McGuigan, Marcy | Marcy McGuigan | Actor | 2000 | 2 | 1 |
| Mitra, Saoli | Saoli Mitra | Actor, Director | 2002 | 2 | 1 |
| Malcolm, Duncan | Duncan Malcolm | Actor | 2009 | 2 | 1 |
| Mulrine, Stephen | Stephen Mulrine | Adaptation, Translator | 2002 - 2008 | 21 | 1 |
| McCormack, Catherine | Catherine McCormack | Actor | 2008 | 2 | 1 |
| Mortensen, Elisabeth | Elisabeth Mortensen | Actor | 2008 - 2010 | 2 | 1 |
| Marsini, Jerry | Jerry Marsini | Actor | 2009 | 1 | 1 |
| Mosbæk, Christian | Christian Mosbæk | Actor | 2009 | 33 | 1 |
| Moore, Christopher | Christopher Moore | Actor, Sound Designer | 1983 - 1999 | 2 | 1 |
| Mustoff, Sonja | Sonja Mustoff | Actor | 1971 - 2013 | 10 | 1 |
| Mess, Attila | Attila Mess | Actor | 2011 | 2 | 1 |
| Mardzoeki, Faiza | Faiza Mardzoeki | Adaptation, Translator | 2011 | 2 | 1 |
| Major, Melinda | Melinda Major | Actor | 2002 - 2011 | 2 | 1 |
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