| Maxwell, James | James Maxwell | Actor | 1959 - 1963 | 7 | 1 |
| Molin, Emma | Emma Molin | Actor | 2007 | 1 | 1 |
| Mulgrew, Gerry | Gerry Mulgrew | Actor | 2007 - 2009 | 8 | 1 |
| Maronde, Julia | Julia Maronde | Actor | 2007 | 2 | 1 |
| Marlow, Billy | Billy Marlow | Actor | 2015 - 2016 | 2 | 1 |
| Macras, Constanza | Constanza Macras | Choreographer, Director | 2006 | 2 | 1 |
| Marton, David | David Marton | Choreographer, Director | 2006 | 2 | 1 |
| Munro, Neil | Neil Munro | Actor, Adaptation, Director | 1981 - 2006 | 3 | 1 |
| Maibaum, Kleer | Kleer Maibaum | Actor | 2007 - 2010 | 2 | 1 |
| Möller, Oliver | Oliver Möller | Actor | 2007 - 2013 | 3 | 1 |
| Meinander, Marina | Marina Meinander | Adaptation, Translator | 2007 | 2 | 1 |
| Mattsson, Veronika | Veronika Mattsson | Actor | 2007 | 1 | 1 |
| Michailov, Mihaela | Mihaela Michailov | Dramaturg | 2015 - 2016 | 6 | 1 |
| Morrison, Charlie | Charlie Morrison | Lighting Designer | 2006 | 1 | 1 |
| Moritz, Kai Christian | Kai Christian Moritz | Actor | 2006 - 2013 | 7 | 1 |
| Marand, Nader, Borhani | Nader Borhani Marand | Adaptation, Director, Dramaturg | 2008 - 2009 | 6 | 1 |
| Marting, Kristin | Kristin Marting | Director | 2009 - 2010 | 2 | 1 |
| Monk O'Connor, Isabell | Isabell Monk O'Connor | Actor | 1993 - 2008 | 2 | 1 |
| Maloney, Tracey | Tracey Maloney | Actor | 1998 - 2008 | 4 | 1 |
| Mathews, Alison | Alison Mathews | Actor | 2009 | 2 | 1 |
| Moreno, Carolina | Carolina Moreno | Translator | 2008 | 1 | 1 |
| Makarevitch, Elisa | Elisa Makarevitch | Actor | 2008 | 8 | 1 |
| Maucher, Marion | Marion Maucher | Actor | 2008 - 2011 | 6 | 1 |
| McAllister, Amy | Amy McAllister | Actor | 2008 | 1 | 1 |
| Meyer, Sarah Sophia | Sarah Sophia Meyer | Actor | 2008 - 2009 | 2 | 1 |
| McCrory, Helen | Helen McCrory | Actor | 2008 | 1 | 1 |
| Mareich, Helmi | Helmi Mareich | Actor | 1950 - 1962 | 4 | 1 |
| Mison, Tom | Tom Mison | Actor | 2008 | 1 | 1 |
| Meyer, Susa | Susa Meyer | Actor | 2008 - 2017 | 5 | 1 |
| Mathis, Christian | Christian Mathis | Composer | 2009 - 2010 | 3 | 1 |
| Matousek, Florence | Florence Matousek | Actor | 2009 - 2013 | 2 | 1 |
| Massingham, Andy | Andy Massingham | Actor | 2009 | 1 | 1 |
| Murray, Michael | Michael Murray | Adaptation, Director | 2009 | 2 | 1 |
| Maurer, Elizabeth Ingram | Elizabeth Ingram Maurer | Actor | 2009 | 1 | 1 |
| Mitchell, Justine | Justine Mitchell | Actor | 2008 | 1 | 1 |
| Müller, C. R. | C. R. Müller | Costume Designer, Designer | 2008 | 2 | 1 |
| Manning, K. Lorrel | K. Lorrel Manning | Adaptation, Director | 2010 - 2017 | 4 | 1 |
| McMurtry, Jonathan | Jonathan McMurtry | Actor | 2010 | 1 | 1 |
| MacDonald, Laura Lynn | Laura Lynn MacDonald | Adaptation, Translator | 2009 | 2 | 1 |
| Müller, Anne | Anne Müller | Actor | 2009 - 2010 | 20 | 1 |
| Mongillo, Fiona | Fiona Mongillo | Actor | 2009 | 1 | 1 |
| Marchand, Jacques | Jacques Marchand | Actor | 2010 | 2 | 1 |
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