| Manta, Ciprian | Ciprian Manta | Musical Director | 2003 | 1 | |
| Mazzoleni, Ettore | Ettore Mazzoleni | Musical Director | 1930 | 1 | |
| Momber, Ernst | Ernst Momber | Musical Director | 1970 | 1 | |
| Maliniak, Georg | Georg Maliniak | Musical Director | 1923 | 1 | |
| Marić, Veljko | Veljko Marić | Musical Director | 1975 | 1 | |
| Madaras, Gergely | Gergely Madaras | Musical Director | 2014 | 1 | |
| Muschinski , Uwe | Uwe Muschinski | Musical Director | | 1 | |
| Moreno, María de los Ángeles | María de los Ángeles Moreno | Musical Director | 1965 | 1 | |
| Menéndez, Gerardo | Gerardo Menéndez | Musical Director | 1978 | 1 | |
| Moukarzel, Ziad | Ziad Moukarzel | Musical Director | 2023 | 4 | |
| Markussen, Erlend, Haugen | Erlend Haugen Markussen | Musical Director, Musician | 2015 | 2 | |
| Mittermeier, Markus | Markus Mittermeier | Musical Director, Musician | 2010 | 2 | |
| Marker, Tony André T. | Tony André T. Marker | Musician | 2007 | 1 | |
| Mostraum, Nils Henrik | Nils Henrik Mostraum | Musician | 2008 | 2 | 1 |
| Mortensen, Inge Hatlelid | Inge Hatlelid Mortensen | Musician | 2013 | 1 | |
| Mingqi, Ruan | Ruan Mingqi | Musician | 2006 - 2009 | 5 | |
| Mæland, Harald | Harald Mæland | Musician | 1983 | 1 | |
| Mear, Chris | Chris Mear | Musician | 2012 | 1 | |
| Moen, Øystein | Øystein Moen | Musician | 2014 - 2015 | 2 | |
| Macklin, Kersti | Kersti Macklin | Musician | 1991 | 1 | |
| Maxwell, Michelle | Michelle Maxwell | Musician | 1994 | 1 | 1 |
| Miròn, Julio | Julio Miròn | Musician | 1994 | 1 | |
| Mölkner, Stefan | Stefan Mölkner | Musician | 1996 | 1 | |
| Miaka, Stephen | Stephen Miaka | Musician | 1966 | 1 | |
| Michekoff, Matthew | Matthew Michekoff | Musician | 1966 | 1 | |
| Mason, Robin | Robin Mason | Musician | 2004 | 5 | |
| Martlew, Zoe | Zoe Martlew | Musician | 2005 - 2006 | 2 | |
| Málek, Prokop | Prokop Málek | Musician | 1940 | 1 | 1 |
| Mieskolainen, Elina | Elina Mieskolainen | Musician | 2001 | 1 | |
| Monsen, Bård | Bård Monsen | Musician | 2006 | 2 | |
| Meland, Berit | Berit Meland | Musician | 2006 | 2 | |
| Miranda, Gabriela | Gabriela Miranda | Musician | 2006 | 2 | |
| Mohamed, Hashim | Hashim Mohamed | Musician | 2006 | 5 | |
| McGrath, Jenni | Jenni McGrath | Musician | 2006 | 1 | |
| Millett, Robert | Robert Millett | Musician | 2009 | 1 | |
| Mages, Klaus | Klaus Mages | Musician | 2008 | 1 | |
| Maschio, Giulio | Giulio Maschio | Musician | 2010 | 1 | |
| Mahesh, Gaddam | Gaddam Mahesh | Musician | 2015 | 1 | |
| Mesquita, Inês | Inês Mesquita | Musician | 2010 | 1 | |
| Marillier, François | François Marillier | Musician | 2010 - 2013 | 16 | |
| Moreau, Julie | Julie Moreau | Musician | 2012 | 11 | |
| May, Ruth | Ruth May | Musician | 2013 | 1 | |
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