| Kocyba, Tadeusz | Tadeusz Kocyba | Composer | 1990 | 1 | |
| Kalantzopoulos, Panos | Panos Kalantzopoulos | Composer | 1990 | 1 | |
| Kirberg, Volker | Volker Kirberg | Composer | 2009 | 1 | |
| Kucsera jr., Géza | Géza Kucsera jr. | Composer | 2011 | 1 | |
| Kaliski, Krzysztof | Krzysztof Kaliski | Composer | 2012 | 1 | |
| Kaspersen, Jan | Jan Kaspersen | Composer | 1990 - 1996 | 2 | |
| Kaufmann, Dieter | Dieter Kaufmann | Composer | 1985 | 1 | |
| Konrád, Ondřej | Ondřej Konrád | Composer | 1986 | 1 | |
| Karanth, B.V. | B.V. Karanth | Composer | 1995 | 2 | |
| Krzyżanowski, Marcin | Marcin Krzyżanowski | Composer | 1993 | 1 | |
| Konstantinov, Ljupče | Ljupče Konstantinov | Composer | 1991 | 1 | |
| Kypourgos, Nikos | Nikos Kypourgos | Composer | 1991 - 1994 | 2 | |
| Karaïndrou, Eleni | Eleni Karaïndrou | Composer | 1991 - 2004 | 2 | |
| Koumentakis, Giorgos | Giorgos Koumentakis | Composer | 1994 | 1 | |
| Kaczmarek, Jan, A. P. | Jan Andrzej Paweł Kaczmarek | Composer | 1995 | 1 | |
| Klusák, Jan | Jan Klusák | Composer | 1996 - 2002 | 3 | |
| Konieczny, Zygmunt | Zygmunt Konieczny | Composer | 1996 | 1 | |
| Kvam, Kyrre | Kyrre Kvam | Composer | 2013 | 1 | |
| Kikuchi, Yutaka | Yutaka Kikuchi | Composer | 1967 | 1 | |
| Kai, Michio | Michio Kai | Composer | 1967 | 1 | |
| Křivinka, Gustav | Gustav Křivinka | Composer | 1966 | 1 | |
| Kaul, Hans | Hans Kaul | Composer | 2002 - 2008 | 2 | |
| Kotepanos, Thodoros | Thodoros Kotepanos | Composer | 2002 | 1 | |
| Král, Darek | Darek Král | Composer | 2002 | 1 | |
| Koláčková, Tereza | Tereza Koláčková | Composer | 2013 | 1 | |
| Kudláč, Jakub | Jakub Kudláč | Composer | 2010 - 2011 | 5 | |
| Kofroň, Petr | Petr Kofroň | Composer | 2009 | 2 | 1 |
| Kleptsin, Aleksei | Aleksei Kleptsin | Composer | 2004 | 1 | |
| Klein, Georg | Georg Klein | Composer | 2004 - 2008 | 6 | 1 |
| Karatolou, Maro | Maro Karatolou | Composer | 2004 | 1 | |
| Kalaš, Julius | Julius Kalaš | Composer | 1941 | 1 | |
| Kelly, Jane | Jane Kelly | Composer | 2015 - 2017 | 38 | |
| Kallerdahl, Fabian | Fabian Kallerdahl | Composer | 2005 | 1 | |
| Kaczyński, Adam | Adam Kaczyński | Composer | 1978 | 1 | |
| Kaszycki, Lucjan | Lucjan Kaszycki | Composer | 1963 | 1 | |
| Kohel, Moinuddin | Moinuddin Kohel | Composer | 2006 | 1 | |
| Khalid, Kamol | Kamol Khalid | Composer | 2006 | 2 | |
| Kjærbye, Kuno | Kuno Kjærbye | Composer | 2006 | 2 | |
| Khalef, Ahmed | Ahmed Khalef | Composer | 2006 | 5 | |
| Kollaros, Nikos | Nikos Kollaros | Composer | 2006 | 1 | |
| Kampen, Claire, Van | Claire Van Kampen | Composer | 2008 | 1 | |
| Kairies, Henrik | Henrik Kairies | Composer | 2008 | 1 | |
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