| Kern, Dan | Dan Kern | Director | 1997 | 1 | 1 |
| Kulczyk, Todd | Todd Kulczyk | Director | 2002 | 1 | 1 |
| Kriegenburg, Andreas | Andreas Kriegenburg | Director | 1997 - 2002 | 4 | 1 |
| Kramer, Rob | Rob Kramer | Director | 2002 | 1 | |
| Krieger, Portia | Portia Krieger | Director | 2002 | 1 | |
| Koležnik, Mateja | Mateja Koležnik | Director | 2002 - 2022 | 9 | |
| Kühnel, Tom | Tom Kühnel | Director | 1997 - 2015 | 3 | 1 |
| Kelly, Tony | Tony Kelly | Director | 2003 | 1 | |
| Küster, Tina | Tina Küster | Director | 2003 | 1 | |
| Kania, Grazyna | Grazyna Kania | Director | 2003 - 2007 | 3 | |
| Keitel, Richard | Richard Keitel | Director | 2003 | 1 | |
| Kubelka, Alexander | Alexander Kubelka | Director | 2004 - 2011 | 2 | 1 |
| Karbauskis, Mindaugas | Mindaugas Karbauskis | Director | 2001 - 2004 | 2 | 1 |
| Kyriakidis, Christos | Christos Kyriakidis | Director | 2004 | 1 | |
| Kempson, Sibyl | Sibyl Kempson | Director | 2015 | 1 | |
| Knödler, Carsten | Carsten Knödler | Director | 2005 - 2015 | 5 | |
| Kariyawasam, Piyal | Piyal Kariyawasam | Director | 2005 - 2006 | 2 | |
| Keruchenko, Irina | Irina Keruchenko | Director | 2005 | 1 | |
| Konstantin, Karel | Karel Konstantin | Director | 1941 | 1 | |
| Kuhlmann, Saskia | Saskia Kuhlmann | Director | 2005 - 2006 | 2 | |
| Kollár, Viktor | Viktor Kollár | Director | 2011 | 2 | |
| Krzemiński, Władysław | Władysław Krzemiński | Director | 1957 | 1 | |
| Karni Cohen, Adam | Adam Karni Cohen | Director | 2001 | 1 | |
| Kristjánsdóttir, María | María Kristjánsdóttir | Director | 2001 | 1 | |
| Kiss, Attila, Seprődi | Attila Seprődi Kiss | Director | 1972 | 1 | |
| Knuth, Nicole | Nicole Knuth | Director | 2007 | 1 | |
| Kaiser, Scott | Scott Kaiser | Director | 2006 | 1 | |
| Kallmeyer, Henner | Henner Kallmeyer | Director | 2006 - 2007 | 2 | |
| Kehlmann, Michael | Michael Kehlmann | Director | 1961 | 1 | |
| Kosminski, Burkhard, C. | Burkhard C. Kosminski | Director | 2008 - 2022 | 2 | |
| Kemp, Ed | Ed Kemp | Director | 2008 | 1 | |
| Kolics, Ágota | Ágota Kolics | Director | 2015 | 1 | |
| Kroll, Karl | Karl Kroll | Director | 1941 | 1 | |
| Kofoed, Thorvald | Thorvald Kofoed | Director | 1900 | 1 | |
| Krebs, Alexander | Alexander Krebs | Director | 2008 | 1 | 1 |
| Kuriyama, Tamiya | Tamiya Kuriyama (栗山民也) | Director | 2010 - 2023 | 21 | |
| Kasapoglu, Isil | Isil Kasapoglu | Director | 2010 | 1 | |
| Kica, Janusz | Janusz Kica | Director | 2009 - 2016 | 5 | 1 |
| Kušej, Martin | Martin Kušej | Director | 2009 - 2014 | 4 | 1 |
| Koralweska, Adrianna | Adrianna Koralweska | Director | 2009 | 1 | |
| Kabir, Ahmedul | Ahmedul Kabir | Director | 2009 | 2 | 1 |
| Knipp, Joe | Joe Knipp | Director | 2013 - 2018 | 3 | |
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