| McHale, Rosemary | Rosemary McHale | Actor | 1977 | 6 | 1 |
| Massey, Daniel | Daniel Massey | Actor | 1977 | 1 | 1 |
| Middlemass, Frank | Frank Middlemass | Actor | 1977 | 1 | 1 |
| McCowan, George | George McCowan | Actor, Director | 1957 - 1978 | 2 | 1 |
| Morse, Hayward | Hayward Morse | Actor | 1978 | 1 | 1 |
| Morrison, Sharon | Sharon Morrison | Actor | 1978 | 1 | 1 |
| Matalon, Vivian | Vivian Matalon | Director | 1978 | 1 | 1 |
| Magee, Rusty | Rusty Magee | Composer | 1981 | 1 | 1 |
| Moore, Richard | Richard Moore | Lighting Designer | 1981 | 1 | 1 |
| Maraden, Frank | Frank Maraden | Actor | 1981 | 1 | 1 |
| Murray, David | David Murray | Actor | 1981 | 1 | 1 |
| Miner, Jan | Jan Miner | Actor | 1981 | 1 | 1 |
| Melander, Tomas | Tomas Melander | Adaptation, Director, Dramaturg | 1984 | 6 | 1 |
| Moeremans, Sarah | Sarah Moeremans | Director | 2013 - 2023 | 32 | 1 |
| Malzacher, Dieter | Dieter Malzacher | Actor, Adaptation | 1993 | 2 | 1 |
| McDermott, Carolyn | Carolyn McDermott | Actor | 1993 | 1 | 1 |
| Malartre, Jean-Baptiste | Jean-Baptiste Malartre | Actor | 1993 | 1 | 1 |
| McKeon, Belinda | Belinda McKeon | Adaptation | 2017 | 1 | 1 |
| Millhagen, Livia | Livia Millhagen | Actor | 2014 - 2024 | 3 | 1 |
| Marie, Gabriel | Gabriel Marie | Conductor | 1896 | 1 | 1 |
| Mehmedbašić, Zeina | Zeina Mehmedbašić | Translator | 1983 - 2011 | 4 | 1 |
| Martínez Sierra, María | María Martínez Sierra | Adaptation, Translator | 1917 - 1930 | 22 | 1 |
| Malara, Francesca | Francesca Malara | Assistant Director, Director | 2018 - 2019 | 2 | 1 |
| Müller, Friedrich | Friedrich Müller | | | | 1 |
| Mendy, Carlos | Carlos Mendy | Actor | 1961 - 1966 | 2 | 1 |
| Marnie, Marc | Marc Marnie | | | | 1 |
| Mjelstad, Kaja | Kaja Mjelstad | | | | 1 |
| Milde, Ingrid | Ingrid Milde | | | | 1 |
| Meek, Anne | Anne Meek | | | | 1 |
| Michaelsen, Ida, Marie | Ida Marie Michaelsen | | | | 1 |
| Moschos, Yannis | Yannis Moschos | | | | 1 |
| 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 | |
| Malek-Nasr, Yasmen | Yasmen Malek-Nasr | Actor | 1993 | 1 | |
| Mori, Mitsuya | Mitsuya Mori | Adaptation, Director, Translator | 1967 - 2023 | 126 | |
| Mills, Grace | Grace Mills | Actor | 1936 - 1938 | 12 | |
| Meyers, Lorna Lynn | Lorna Lynn Meyers | Actor | 1937 - 1938 | 7 | |
| Major, Tamás | Tamás Major | Actor | 1931 - 1941 | 7 | |
| Morozova, - | - Morozova | Actor | 1914 | 1 | |
| Moser, William | William Moser | Costume Designer, Designer | 1996 - 2005 | 2 | |
|
|
