| Kempter, - | - Kempter | Actor | 1905 - 1906 | 2 | |
| Kubela, - | - Kubela | Actor | 1905 - 1908 | 2 | |
| Kleipzig, Agnes | Agnes Kleipzig | Actor | 1905 - 1908 | 17 | |
| Kuckartz, Mathias | Mathias Kuckartz | Actor | 1905 - 1909 | 3 | |
| Kriete, Luise | Luise Kriete | Actor | 1905 - 1911 | 12 | |
| Krampff, Ernst | Ernst Krampff | Actor | 1905 - 1911 | 2 | |
| Kesting, Christian | Christian Kesting | Actor | 1905 - 1911 | 3 | |
| Knöfler, Fritz | Fritz Knöfler | Actor | 1905 - 1911 | 3 | |
| Kautsky, Ferdinand | Ferdinand Kautsky | Actor | 1905 - 1913 | 2 | |
| Kornbeck, Eyvind | Eyvind Kornbeck | Actor | 1905 - 1915 | 5 | |
| Kolbe, Alexandrine | Alexandrine Kolbe | Actor | 1905 - 1916 | 4 | |
| Koch, Walter | Walter Koch | Actor, Conductor | 1905 - 1925 | 2 | |
| Krastev, Dr. Krastjo | Krastjo Krastev (Dr. Krastjo Krastev) | Actor, Translator | 1905 - 1996 | 9 | |
| Klára, Tompa | Tompa Klára | Actor | 1905 - 2010 | 7 | 8 |
| Kośnierska, Janina | Janina Kośnierska | Actor | 1906 | 1 | |
| Kunert, James | James Kunert | Actor | 1906 | 1 | |
| Knaack, Carl | Carl Knaack | Actor | 1906 | 1 | |
| König, Rosa | Rosa König | Actor | 1906 | 1 | |
| Kriajeva, V. | V. Kriajeva | Actor | 1906 | 3 | |
| Karataeff, A. | A. Karataeff | Actor | 1906 | 3 | 1 |
| Korecki, Henryk Cudnowski | Henryk Cudnowski Korecki | Actor | 1906 | 1 | |
| Kotopoulis, Dimitrios | Dimitrios Kotopoulis | Actor | 1906 | 1 | |
| Kouris, Nikolaos | Nikolaos Kouris | Actor | 1906 | 2 | |
| Kováts, Ilonka | Ilonka Kováts | Actor | 1906 | 1 | |
| Krauss, M. | M. Krauss | Actor | 1906 | 1 | |
| Kaspar, Theodor | Theodor Kaspar | Actor | 1906 | 1 | |
| Krug, Karl | Karl Krug | Director | 1906 | 1 | |
| Kehr, Ben, Otto | Ben Otto Kehr | Actor | 1906 | 1 | |
| Kißmer, Willy | Willy Kißmer | Actor | 1906 | 1 | |
| Kozlovićeva, M | M Kozlovićeva | Actor | 1906 | 1 | |
| Kotopouli-Loui, Foteini | Foteini Kotopouli-Loui | Actor | 1906 - 1907 | 2 | |
| Kirchner, Franz | Franz Kirchner | Actor | 1906 - 1907 | 5 | |
| Kingdon, Frank | Frank Kingdon | Actor | 1906 - 1907 | 9 | |
| Klaer, Adele | Adele Klaer | Actor | 1906 - 1907 | 3 | |
| Koch, Franziska | Franziska Koch | Actor | 1906 - 1907 | 3 | |
| Kaiser, Frk. | Frk. Kaiser | Actor | 1906 - 1908 | 2 | |
| Kroneck, Hans | Hans Kroneck | Actor | 1906 - 1908 | 2 | |
| Karpáti, Sándor | Sándor Karpáti | Actor | 1906 - 1908 | 5 | |
| Kottow, Hans | Hans Kottow | Actor, Director | 1906 - 1908 | 3 | |
| Kühne, Alfred | Alfred Kühne | Actor | 1906 - 1913 | 5 | |
| Kraack, Mr. | Mr. Kraack | Actor | 1906 - 1915 | 3 | |
| Klein, Julius | Julius Klein | Designer | 1906 - 1916 | 7 | |
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