| Köck, Eduard | Eduard Köck | Actor, Director | 1916 - 1920 | 2 | |
| Krüger, Emmy | Emmy Krüger | Actor | 1916 - 1918 | 4 | |
| Knapp, Cornelia | Cornelia Knapp | Actor | 1916 - 1917 | 2 | |
| Knowles, Alice | Alice Knowles | Actor | 1916 | 1 | |
| Klotz, Adolf | Adolf Klotz | Actor | 1916 | 1 | |
| Kirschner, - | - Kirschner | Costume Designer | 1916 | 2 | |
| Kraus, Rudolf | Rudolf Kraus | Actor | 1916 | 1 | |
| Koehler, Albert | Albert Koehler | Actor, Director | 1916 | 2 | |
| Kantiotis, Emmanouil | Emmanouil Kantiotis | Actor | 1916 | 1 | |
| Kariniemi, Viola | Viola Kariniemi | Actor | 1916 | 1 | |
| Kessler, Eva | Eva Kessler | Actor | 1916 | 1 | |
| Krause, Hellmuth | Hellmuth Krause | Actor | 1916 | 1 | |
| Kajanus, Robert | Robert Kajanus | Conductor | 1916 | 1 | |
| Kates, Bernard | Bernard Kates | Actor | 1915 - 1981 | 2 | |
| Köhler, Hertha | Hertha Köhler | Actor | 1915 - 1936 | 3 | |
| Keßler, Hugo | Hugo Keßler | Actor | 1915 - 1931 | 5 | |
| Körner, Lothar | Lothar Körner | Actor | 1915 - 1925 | 26 | |
| Kutschera, Tilly | Tilly Kutschera | Actor | 1915 - 1919 | 4 | |
| Kaufmann, Martha | Martha Kaufmann | Actor | 1915 - 1918 | 3 | |
| Kirchberger, Leo | Leo Kirchberger | Actor | 1915 - 1918 | 2 | |
| Korb, Ludwig | Ludwig Korb | Actor | 1915 - 1917 | 2 | |
| Kraus, Willi | Willi Kraus | Actor | 1915 - 1917 | 3 | |
| Kahle, Elisabeth | Elisabeth Kahle | Actor | 1915 | 2 | |
| Klinder, Lotte | Lotte Klinder | Actor | 1915 | 1 | |
| Kleiner, Oskar | Oskar Kleiner | Actor | 1915 | 1 | |
| Kämmerer, Karl | Karl Kämmerer | Actor | 1915 | 1 | |
| Kaiser, Lola | Lola Kaiser | Actor | 1915 | 1 | |
| Keßler, Eva | Eva Keßler | Actor | 1915 | 1 | |
| Klossowski, Erich | Erich Klossowski | Costume Designer, Designer | 1915 | 2 | |
| Kaiser-Titz, Erich | Erich Kaiser-Titz | Actor | 1915 | 2 | |
| Kabisch, Adalbert | Adalbert Kabisch | Actor | 1915 | 1 | |
| Koch, Karl | Karl Koch | Actor | 1915 | 1 | |
| Kassabova, Ivanka | Ivanka Kassabova | Actor | 1915 | 1 | |
| Kundziņš, P. | P. Kundziņš | Designer | 1915 | 1 | |
| Kwiatkowski, Artur | Artur Kwiatkowski | Actor | 1915 | 1 | |
| Kārkliņš, Juris | Juris Kārkliņš | Actor | 1915 | 1 | |
| Kokkou, Nina | Nina Kokkou | Actor | 1915 | 1 | |
| Kopp, Erwin | Erwin Kopp | Actor | 1915 | 1 | |
| Kraus, Hans | Hans Kraus | Actor | 1915 | 1 | |
| Kramer, Vagn | Vagn Kramer | Actor | 1914 - 2003 | 7 | |
| Köllner, Herbert | Herbert Köllner | Actor | 1914 - 1960 | 2 | |
| Kalser, Erwin | Erwin Kalser | Actor, Director | 1914 - 1950 | 9 | |
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