| Metaxa, Argyro | Argyro Metaxa | Composer | 1961 - 1997 | 12 | |
| Majewski, Hans-Martin | Hans-Martin Majewski | Composer | 1966 | 1 | |
| Mingus, Charles | Charles Mingus | Composer | 2002 | 1 | |
| Maraire, - | - Maraire | Composer | 2002 | 1 | |
| Marvin, Mel | Mel Marvin | Composer | 1989 | 1 | |
| Milhaud, Darius | Darius Milhaud | Composer | 2003 - 2005 | 2 | |
| Matkó, Tamás | Tamás Matkó | Composer | 2012 | 1 | |
| MIDI LIDI | MIDI LIDI | Composer | 2011 | 3 | |
| Montgomery, Robert | Robert Montgomery | Composer | 2004 | 1 | |
| Malhocký, Pavel | Pavel Malhocký | Composer | 2001 | 1 | |
| Menon, Tarun | Tarun Menon | Composer | 2005 | 1 | |
| Mertens, Wim | Wim Mertens | Composer | 2005 | 3 | |
| Maric, Dave | Dave Maric | Composer | 2005 - 2008 | 3 | |
| Malawski, Artur | Artur Malawski | Composer | 1957 | 1 | |
| Mertens, Wim | Wim Mertens | Composer | 1989 - 1990 | 2 | |
| Müller, Johannes | Johannes Müller | Composer | 2007 | 1 | |
| Metallinos, Giannis | Giannis Metallinos | Composer | 2006 - 2013 | 2 | |
| Mishra, Sarita | Sarita Mishra | Composer | 2006 - 2009 | 2 | |
| Mathis, Christian | Christian Mathis | Composer | 2009 - 2010 | 3 | |
| Mohr, Matthias | Matthias Mohr | Composer | 2009 | 2 | |
| MacLeod, Kevin | Kevin MacLeod | Composer | 2009 | 1 | |
| McKelvey, Michael | Michael McKelvey | Composer | 2010 | 1 | |
| McGuire, Louis | Louis McGuire | Composer | 2009 | 1 | |
| Majumdar, Porimal | Porimal Majumdar | Composer | 2009 | 1 | |
| Müller, Tom | Tom Müller | Composer | 2011 | 2 | |
| Manolidou, Tatiana | Tatiana Manolidou | Composer | 2012 | 1 | |
| Maattola, Almos | Almos Maattola | Composer | 1964 | 1 | |
| Myers, Anne | Anne Myers | Composer | 1964 | 1 | |
| Mahavir, Abhay, Sharma | Abhay Sharma Mahavir | Composer | 2012 | 1 | |
| Marilier, François | François Marilier | Composer | 2011 | 1 | |
| Matisz, Flóra | Flóra Matisz | Composer | 2016 - 2023 | 4 | |
| Meriläinen, Usko | Usko Meriläinen | Composer | 1957 | 1 | |
| Maccagno, Stefano | Stefano Maccagno | Composer | 1998 | 1 | |
| Marolt, Mario | Mario Marolt | Composer | 1998 | 1 | |
| Mankovecký, Peter | Peter Mankovecký | Composer | 1998 | 1 | |
| Mélan-Gúéroult, - | - Mélan-Gúéroult | Composer | 1949 | 1 | |
| Mas, Jean-Pierre | Jean-Pierre Mas | Composer | 1976 | 1 | |
| McKoy, Butch | Butch McKoy | Composer | 2018 - 2021 | 20 | |
| Magee, Rusty | Rusty Magee | Composer | 1981 | 1 | |
| Moutsinas, Lefteris | Lefteris Moutsinas | Composer | 2016 - 2017 | 2 | |
| Munzer-Dorn, Markus | Markus Munzer-Dorn | Composer | 1993 | 1 | |
| Moran, Robert | Robert Moran | Composer | 1994 | 1 | |
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