| Matthiae, Oliver | Oliver Matthiae | Actor | 2002 - 2008 | 16 | 1 |
| Matthias, Marina | Marina Matthias | Actor | 1997 - 2006 | 8 | 1 |
| Mattsson, Per | Per Mattsson | Actor | 1989 - 1998 | 15 | 1 |
| Matus, Michael | Michael Matus | Actor | 2005 | 1 | 1 |
| Matysová, Milada | Milada Matysová | Actor | 1939 - 1954 | 3 | 1 |
| Mauer, Lubo | Lubo Mauer | Producer, Translator | 1975 - 1976 | 4 | 1 |
| Mauhs, Else | Else Mauhs | Actor | 1925 - 1928 | 2 | 1 |
| Maxwell, Jan | Jan Maxwell | Actor | 1997 | 1 | 1 |
| Mbewe, Mbumba | Mbumba Mbewe | Actor | 2006 | 23 | 1 |
| McCarthy, Eoin | Eoin McCarthy | Actor | 2000 - 2003 | 2 | 1 |
| McDonald-Lewis, Mary | Mary McDonald-Lewis | Director | 2007 | 1 | 1 |
| McDonnell, Colleen | Colleen McDonnell | Actor | 2007 | 1 | 1 |
| McFarlane, James Walter | James Walter McFarlane | Translator | 1961 - 2012 | 18 | 1 |
| McHallem, Christopher | Christopher McHallem | Actor | 1992 | 3 | 1 |
| McKintosh, Peter | Peter McKintosh | Designer | 2003 - 2007 | 4 | 1 |
| McLeish, Kenneth | Kenneth McLeish | Adaptation, Translator | 1990 - 2015 | 35 | 1 |
| McMahon, Charles | Charles McMahon | Actor, Director | 1999 - 2005 | 2 | 1 |
| McRae, Bruce | Bruce McRae | Actor | 1905 - 1908 | 7 | 1 |
| Medina, Kristopher | Kristopher Medina | Actor | 2003 - 2011 | 35 | 1 |
| Mehrjui, Dariush | Dariush Mehrjui | Director, Producer | 1993 - 2014 | 4 | 1 |
| Mejlænder-Hellesen, Marie | Marie Mejlænder-Hellesen | Actor | 1891 - 1921 | 16 | 1 |
| Melander, Björn | Björn Melander | Adaptation, Director | 1999 - 2008 | 6 | 1 |
| Melldahl, Åsa | Åsa Melldahl | Director | 2000 - 2007 | 3 | 1 |
| Menelaus, Jane | Jane Menelaus | Actor | 1989 | 1 | 1 |
| Menzies, Robert | Robert Menzies | Actor | 1988 - 2017 | 5 | 1 |
| Meshulach, Rivka | Rivka Meshulach | Adaptation, Translator | 1999 - 2013 | 3 | 1 |
| Mestad, Henrik | Henrik Mestad | Actor | 1991 - 2016 | 66 | 1 |
| Meyer, Johannes | Johannes Meyer | Actor | 1925 - 2004 | 25 | 1 |
| Meyer, Michael | Michael Meyer | Adaptation, Translator | 1958 - 2022 | 275 | 1 |
| Meyn, Robert | Robert Meyn | Actor, Director | 1935 - 1952 | 5 | 1 |
| Miceli, David | David Miceli | Actor | 2006 | 1 | 1 |
| Michael, Peter | Peter Michael | Actor | 2007 - 2011 | 7 | 1 |
| Michalatou, Maeri | Maeri Michalatou | Translator | 2006 - 2012 | 5 | 1 |
| Mihályfi, Károly | Károly Mihályfi | Actor | 1914 - 1927 | 4 | 1 |
| Militaru, Sorin | Sorin Militaru | Director | 2006 | 2 | 1 |
| Mills, Dana | Dana Mills | Actor | 1974 | 1 | 1 |
| Mills, Liz | Liz Mills | Director | 1995 | 1 | 1 |
| Milotová, Bárbora | Bárbora Milotová | Actor | 2004 - 2005 | 4 | 1 |
| Minot, Anna | Anna Minot | Actor | 1950 - 1995 | 3 | 1 |
| Mitchell, Maude | Maude Mitchell | Actor, Adaptation, Dramaturg | 2003 - 2011 | 102 | 1 |
| Mitra, Sambhu | Sambhu Mitra | Actor, Adaptation, Director, Translator | 1952 - 2002 | 10 | 1 |
| Moan, Henny | Henny Moan | Actor | 1957 - 2013 | 64 | 1 |
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