| Maciá, Carlos | Carlos Maciá | Actor | 2006 - 2007 | 6 | |
| Maciá, Ximo | Ximo Maciá | Lighting Designer | 2006 - 2007 | 6 | |
| Michalakopoulos, Giorgos | Giorgos Michalakopoulos | Actor, Director | 1984 - 2008 | 6 | |
| Michailov, Mihaela | Mihaela Michailov | Dramaturg | 2015 - 2016 | 6 | 1 |
| Morariu, Andrei | Andrei Morariu | Designer | 2015 - 2016 | 6 | |
| Meira, Ana | Ana Meira | Actor | 2006 - 2007 | 6 | |
| Marrafa, Maria | Maria Marrafa | Actor | 2006 - 2007 | 6 | |
| Marand, Nader, Borhani | Nader Borhani Marand | Adaptation, Director, Dramaturg | 2008 - 2009 | 6 | 1 |
| Maucher, Marion | Marion Maucher | Actor | 2008 - 2011 | 6 | 1 |
| Mytaras, Dimitris | Dimitris Mytaras | Costume Designer, Designer | 1965 - 1966 | 6 | |
| Müller, Hans Jürgen | Hans Jürgen Müller | Actor | 1991 - 1993 | 6 | |
| Mächtlinger, Otto | Otto Mächtlinger | Actor | 1971 - 1973 | 6 | |
| McClish, Amanda | Amanda McClish | Actor | 2009 | 6 | |
| Mercer, Bryan | Bryan Mercer | Actor | 2009 | 6 | |
| Maultzsch, Stefan | Stefan Maultzsch | Actor | 2010 | 6 | |
| Mack, Billy | Billy Mack | Actor | 2009 - 2021 | 6 | |
| Moliner, Benjamin | Benjamin Moliner | Actor | 2009 - 2011 | 6 | |
| Morell, Andre | Andre Morell | Actor | 1950 - 1964 | 6 | |
| Marull, Laia | Laia Marull | Actor | 1996 - 2013 | 6 | |
| Möst, Raphaela | Raphaela Möst | Actor | 2012 - 2017 | 6 | 1 |
| Marinescu, Ion | Ion Marinescu | Actor | 1965 - 1984 | 6 | |
| Mathieu, Claude | Claude Mathieu | Actor | 2012 | 6 | |
| Myrat, Dimitris | Dimitris Myrat | Actor | 1939 - 1990 | 6 | |
| Matte, Emmanuel | Emmanuel Matte | Actor | 2013 | 6 | |
| Maelzer, Mia | Mia Maelzer | Actor | 2016 - 2017 | 6 | |
| MacKay, Fulton | Fulton MacKay | Actor | 1959 - 1968 | 6 | |
| Mösl, Christian | Christian Mösl | Actor | 2013 | 6 | |
| Münichsdorfer, Christian | Christian Münichsdorfer | Actor | 2013 | 6 | |
| Markey, Jolande | Jolande Markey | Actor | 1956 - 1957 | 6 | |
| Mi, Le | Le Mi | Actor | 2015 - 2017 | 6 | |
| Mihail Dragomirescu, Laura | Laura Mihail Dragomirescu | Translator | 1920 - 1935 | 6 | |
| Magnusson, Sven | Sven Magnusson | Actor | 1943 | 6 | |
| McHale, Rosemary | Rosemary McHale | Actor | 1977 | 6 | 1 |
| Melander, Tomas | Tomas Melander | Adaptation, Director, Dramaturg | 1984 | 6 | 1 |
| Maarud, Amund | Amund Maarud | Actor, Composer, Musician | 2018 - 2019 | 6 | |
| Mihanović, Zoran | Zoran Mihanović | Lighting Designer | 1990 - 2018 | 6 | |
| Mejuto, Xoán Carlos | Xoán Carlos Mejuto | Actor, Adaptation, Director | 2017 - 2019 | 6 | |
| Mingo, Bernardo | Bernardo Mingo | Special Effects | 1972 - 1975 | 6 | |
| Mantiqueira, Pedro | Pedro Mantiqueira | Translator | 2022 - 2024 | 6 | |
| Meyers, Lorna Lynn | Lorna Lynn Meyers | Actor | 1937 - 1938 | 7 | |
| Major, Tamás | Tamás Major | Actor | 1931 - 1941 | 7 | |
| Morska-Popławska, Gabriela | Gabriela Morska-Popławska | Actor | 1900 - 1908 | 7 | |
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