| Mavragani, Georgia | Georgia Mavragani | Director, Dramaturg | 2024 | 3 | |
| Moretti, Giancarlo | Giancarlo Moretti | Adaptation, Director, Dramaturg | 2022 | 3 | |
| Migliorati, Bianca | Bianca Migliorati | Choreographer | 2014 | 3 | |
| Martínez, Lilia | Lilia Martínez | Actor | 1954 - 1956 | 2 | |
| Mateos, Héctor | Héctor Mateos | Actor | 1954 - 1956 | 2 | |
| Matute, Ivaro | Álvaro Matute (Ivaro Matute) | Actor | 1954 - 1956 | 2 | |
| Muñoz, José | José Muñoz | Actor | 1954 - 1956 | 2 | |
| Massey, Anna | Anna Massey | Actor | 1970 - 1973 | 2 | 1 |
| Moser, William | William Moser | Costume Designer, Designer | 1996 - 2005 | 2 | |
| Meyerhoff, Juliane | Juliane Meyerhoff | Actor | 1976 - 2009 | 2 | 1 |
| Markus, Tarja | Tarja Markus | Actor | 1967 - 1977 | 2 | |
| Maas, Dieter | Dieter Maas | Actor | 1978 - 1998 | 2 | |
| Macaleer, Carey | Carey Macaleer | Actor | 2006 | 2 | 1 |
| Madden, Donald | Donald Madden | Actor | 1971 | 2 | 1 |
| Madsen, Julie | Julie Madsen | Actor | 1915 | 2 | |
| Madsen, Soren | Soren Madsen | Designer | 2001 | 2 | |
| Magerman, Els | Els Magerman | Actor | 1972 - 1996 | 2 | |
| Magrofuoco, Jacques | Jacques Magrofuoco | Sound Designer | 1986 | 2 | |
| Maier, Werner | Werner Maier | Sound Designer | 1974 - 1978 | 2 | |
| Maier-Gehring, Christoph | Christoph Maier-Gehring | Dramaturg | 2001 - 2003 | 2 | |
| Majewsky, Stella | Stella Majewsky | Actor | 1995 | 2 | |
| Malaka, Bernard | Bernard Malaka | Actor | 2003 | 2 | |
| Malinowska, Czesława | Czesława Malinowska | Actor | 1905 | 2 | |
| Malsbender, Herbert | Herbert Malsbender | Actor | 1950 - 1963 | 2 | |
| Mandel, Ellen | Ellen Mandel | Composer | 1994 - 1997 | 2 | |
| Mánik, László | László Mánik | Mask Maker | 1961 - 1969 | 2 | |
| Mannheimer, Bodil | Bodil Mannheimer | Actor | 1968 | 2 | |
| Mantius, Karlheinz | Karlheinz Mantius | Actor | 1964 - 1973 | 2 | |
| Marin, Hans | Hans Marin | Actor | 1973 - 1988 | 2 | |
| Maron, Hanna | Hanna Maron | Actor | 1959 - 1966 | 2 | |
| Martin, Bob | Bob Martin | Lighting Designer, Sound Designer | 1990 | 2 | |
| Mascus, Hella-Birgit | Hella-Birgit Mascus | Actor | 1989 - 1990 | 2 | |
| Matela, Kimberly | Kimberly Matela | Costume Designer | 2006 | 2 | |
| Matikainen, Osmo | Osmo Matikainen | Actor | 1983 - 2006 | 2 | |
| Matsui, Sumako | Sumako Matsui | Actor | 1914 | 2 | |
| Matsumoto, Kappei | Kappei Matsumoto | Actor | 1934 - 1978 | 2 | |
| Matthias, Peter | Peter Matthias | Actor | 1975 - 1992 | 2 | |
| Mátyás, Jolán | Jolán Mátyás | Actor | 1965 - 1969 | 2 | |
| Matzkanin, Mark | Mark Matzkanin | Lighting Designer | 1990 - 2007 | 2 | |
| Mauhs, Else | Else Mauhs | Actor | 1925 - 1928 | 2 | 1 |
| May, Eberhard | Eberhard May | Actor | 1975 - 1997 | 2 | |
| McCarthy, Eoin | Eoin McCarthy | Actor | 2000 - 2003 | 2 | 1 |
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