| Mathias, Sean | Sean Mathias | Director | 1993 | 3 | |
| MacLiammoir, Nick | Nick MacLiammoir | Lighting Designer | 1993 | 3 | |
| Mezon, Jim | Jim Mezon | Actor | 1989 - 2012 | 3 | |
| Max, Edward | Edward Max | Actor | 1991 | 3 | |
| Muck, Anna-Katharina | Anna-Katharina Muck | Actor | 1993 - 2004 | 3 | |
| Mosleh, Siham | Siham Mosleh | Actor | 1993 | 3 | |
| McPherson, Alexander | Alexander McPherson | Costume Designer, Designer | 1971 - 1982 | 3 | |
| Mahlberg, Reinhard | Reinhard Mahlberg | Actor | 1994 - 2014 | 3 | |
| Māsēns, Agris | Agris Māsēns | Actor, Director | 1982 - 2010 | 3 | |
| Medeiros, Cícero | Cícero Medeiros | Actor, Costume Designer, Designer | 1994 | 3 | |
| McCabe, Vincent | Vincent McCabe | Actor | 1980 - 2003 | 3 | |
| Medina, Marcio | Marcio Medina | Costume Designer, Designer | 1990 - 2011 | 3 | |
| Manni, Mino | Mino Manni | Actor | 1997 - 1998 | 3 | |
| Mombelli, Giulia | Giulia Mombelli | Actor | 1997 - 1998 | 3 | |
| Motta, Litzajaya | Litzajaya Motta | Adaptation, Designer, Director | 1997 | 3 | |
| Miranda-Bascunan, David | David Miranda-Bascunan | Actor | 1995 | 3 | |
| Mortimer, Terry | Terry Mortimer | Actor, Musical Director | 1980 | 3 | |
| Moravec, Tomáš | Tomáš Moravec | Designer | 1995 - 2012 | 3 | |
| Milliken, Catherine | Catherine Milliken | Composer | 1996 | 3 | |
| Matsumura, Hikojiro | Hikojiro Matsumura | Actor | 1996 - 2002 | 3 | |
| Meyer, Jessica | Jessica Meyer | Actor | 1995 | 3 | |
| Müller, Wiebke | Wiebke Müller | Actor | 1995 | 3 | |
| Międzik, Tomasz | Tomasz Międzik | Actor | 1995 - 2009 | 3 | |
| Miśkiewicz , Paweł | Paweł Miśkiewicz | Director | 1995 - 2007 | 3 | |
| Müller, Anna | Anna Müller | Actor | 1995 | 3 | |
| Malmring, Olle | Olle Malmring | Actor | 1997 | 3 | |
| Mészáros, Mihály | Mihály Mészáros | Actor | 1995 - 2007 | 3 | |
| Melo, Sônia | Sônia Melo | Actor | 1994 | 3 | |
| Malonyai, Dezső | Dezső Malonyai | Translator | 1890 - 1891 | 3 | |
| Maciejewski, Zygmunt | Zygmunt Maciejewski | Actor | 1963 - 1969 | 3 | |
| Matamoros, Diego | Diego Matamoros | Actor | 2005 - 2016 | 3 | |
| McKey, Susan | Susan McKey | Actor | 1998 - 2011 | 3 | |
| Molnár, János | János Molnár | Actor | 1920 - 1924 | 3 | |
| McCarty, Joel | Joel McCarty | Lighting Designer | 1969 - 1970 | 3 | |
| Mosch, Rita | Rita Mosch | Actor | 1968 - 2003 | 3 | |
| Moffat, Donald | Donald Moffat | Actor | 1965 - 1967 | 3 | |
| Mackert, Josef | Josef Mackert | Dramaturg | 2004 - 2007 | 3 | |
| Matzura, Evelyn | Evelyn Matzura | Actor | 1967 - 1971 | 3 | |
| Mannermaa, Esko | Esko Mannermaa | Actor | 1967 - 1971 | 3 | |
| Madison, Lawrence | Lawrence Madison | Actor | 1966 | 3 | |
| McGovern, Dennis | Dennis McGovern | Actor | 1965 | 3 | |
| Morgan, Mario | Mario Morgan | Adaptation, Director | 1965 - 1980 | 3 | |
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