| Mago, - | - Mago (Max Goldstein) | Costume Designer, Designer | 1964 - 1979 | 9 | |
| Meter, Jeremy, van | Jeremy van Meter | Actor | 2012 - 2014 | 9 | |
| Müller, Heinz | Heinz Müller | Actor | 1981 - 2005 | 9 | |
| McRobbie, Peter | Peter McRobbie | Actor | 1966 - 1992 | 9 | |
| Mazis, Giorgos | Giorgos Mazis | Actor | 1985 | 9 | |
| Mantzaris, Christos | Christos Mantzaris | Actor | 1985 | 9 | |
| Myara, Charles | Charles Myara | Actor | 1988 - 1989 | 9 | |
| Müller, Bernd-Dieter | Bernd-Dieter Müller | Adaptation, Designer, Director | 1989 - 2003 | 9 | |
| Mushran, Ashwin | Ashwin Mushran | Actor | 2014 - 2018 | 9 | |
| Murtinho, Kalma | Kalma Murtinho | Costume Designer | 1966 - 1983 | 9 | |
| May, Alice | Alice May | Actor | 1891 | 9 | |
| Middleditch, Tom | Tom Middleditch | Actor | 2002 | 9 | |
| Mouhous, Hakim | Hakim Mouhous | Designer | 2004 - 2005 | 9 | |
| Missbach, Klaus | Klaus Missbach | Dramaturg | 2005 - 2017 | 9 | |
| Marrs, Bruce | Bruce Marrs | Mask Maker | 2005 - 2006 | 9 | |
| Monsaingeon, Grégoire | Grégoire Monsaingeon | Actor | 2007 | 9 | |
| Meininger, Laurent | Laurent Meininger | Actor | 2007 | 9 | |
| Massini, Fabrizio | Fabrizio Massini | Producer | 2014 - 2019 | 9 | |
| Maas, Kimberly | Kimberly Maas | Actor | 2009 | 9 | |
| Minichmayr, Birgit | Birgit Minichmayr | Actor | 2012 - 2017 | 9 | 5 |
| Martin, Serge | Serge Martin | Actor | 2013 - 2014 | 9 | |
| Mălău, Ioana | Ioana Mălău | Dramaturg | 2017 - 2019 | 9 | |
| Ménoret, Laurent | Laurent Ménoret | Actor | 2012 - 2015 | 9 | |
| Margarit, Jacint | Jacint Margarit | Assistant Director | 2013 - 2014 | 9 | |
| Manegold, Barbara | Barbara Manegold | Choreographer | 2002 | 8 | |
| Maranzana, Mario, | Mario Maranzana | Actor, Director | 1974 - 1998 | 8 | |
| Markham, Petra | Petra Markham | Actor | 2004 - 2016 | 8 | |
| Martin, Harald, | Harald Martin | Designer | 1954 - 1973 | 8 | |
| Matthias, Marina | Marina Matthias | Actor | 1997 - 2006 | 8 | |
| Meyer, René-Philippe | René-Philippe Meyer | Actor | 2008 - 2011 | 8 | 2 |
| Mitchell, Robert | Robert Mitchell | Actor, Designer, Director | 1927 - 1951 | 8 | |
| Modzelewska, Józefa, | Józefa Modzelewska | Actor | 1891 - 1920 | 8 | |
| Müller, Lotte, | Lotte Müller | Actor | 1907 - 1921 | 8 | |
| Magnussen, Arne Chr. | Arne Chr. Magnussen | Actor | 1951 | 8 | |
| Mack, William B., | William B. Mack (William B. Mack) | Actor | 1903 - 1907 | 8 | |
| Müller, Maximilian | Maximilian Müller | Composer | 2010 - 2011 | 8 | |
| Magnus, Thomas, | Thomas Magnus | Actor | 2011 | 8 | |
| Moritzon, Mr., | Mr. Moritzon | Actor | 1870 - 1871 | 8 | |
| Mošna, Jindřich, | Jindřich Mošna | Actor | 1891 - 1907 | 8 | |
| Mühlhofer, Hans, | Hans Mühlhofer | Actor | 1898 - 1926 | 8 | |
| Maltana, Elsa, | Elsa Maltana | Actor | 1898 - 1913 | 8 | |
| Mayer, Hans, | Hans Mayer | Actor | 1900 - 1902 | 8 | |
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