| 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 | |
| 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 | |
| Kolbe, -, | - Kolbe | Actor | 1906 - 1916 | 2 | |
| Klinder, Betty, | Betty Klinder | Actor | 1906 - 1918 | 12 | |
| Kempner, Gabriel, | Gabriel Kempner | Translator | 1906 - 1918 | 2 | |
| Kopal, Robert | Robert Kopal | Actor | 1906 - 1919 | 2 | |
| Kotopouli-Myrat, Chrysoula, | Chrysoula Kotopouli-Myrat | Actor | 1906 - 1921 | 3 | |
| Krauß, Ingo, | Ingo Krauß | Actor, Director | 1906 - 1922 | 7 | |
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