| Kirsch, Richard | Richard Kirsch | Director | 1904 | 1 | |
| Korczak-Wesołowski, Zygmunt, | Zygmunt Korczak-Wesołowski | Actor | 1904 - 1905 | 2 | |
| Komissarzhevskaya, Vera F., | Ве́ра Фё́доровна Комиссарже́вская (Vera F. Komissarzhevskaya) | Actor, Producer | 1904 - 1908 | 98 | 14 |
| Kraus, Arnošt, | Arnošt Kraus | Translator | 1904 - 1921 | 11 | |
| Kuckartz, Mathias, | Mathias Kuckartz | Actor | 1905 | 3 | |
| Klein, Demeter, | Demeter Klein | Actor | 1905 | 1 | |
| Kanisch, Edgar, | Edgar Kanisch | Actor | 1905 | 1 | |
| Karthaus, Willi, | Willi Karthaus | Actor | 1905 | 4 | |
| Koehne, Marie, | Marie Koehne | Actor | 1905 | 1 | |
| Kernic, Annie, | Annie Kernic | Actor | 1905 | 1 | |
| Krasa, Rudolf, | Rudolf Krasa | Actor | 1905 | 1 | |
| Koch, Walter, | Walter Koch | Actor, Conductor | 1905 | 2 | |
| Kriß, Stephanie, | Stephanie Kriß | Actor | 1905 | 1 | |
| Kühne, Leopoldine, | Leopoldine Kühne | Actor | 1905 | 1 | |
| Kolbe, Alexandrine, | Alexandrine Kolbe | Actor | 1905 | 4 | |
| Kempter, -, | - Kempter | Actor | 1905 | 2 | |
| Krampff, Ernst, | Ernst Krampff | Actor | 1905 | 2 | |
| Krastev, Dr. Krastjo, | Krastjo Krastev (Dr. Krastjo Krastev) | Actor, Translator | 1905 | 9 | |
| Kirkov, Geno, | Geno Kirkov | Actor | 1905 | 1 | |
| Kolthoff, Signe, | Signe Kolthoff | Actor | 1905 | 2 | |
| Knox, R. F., | R. F. Knox (R. F. Knox) | Actor | 1905 | 1 | |
| Krössing, Adolf, | Adolf Krössing | Actor, Director | 1905 | 2 | |
| Khol, František, | František Khol | Adaptation | 1905 | 1 | |
| Kliment, Václav, | Václav Kliment | Actor | 1905 | 1 | |
| Kubátová, Marie, | Marie Kubátová | Actor | 1905 | 1 | |
| Kindl, Karel, | Karel Kindl | Actor | 1905 | 1 | |
| Keith, Carrie, | Carrie Keith | Actor | 1905 | 1 | |
| Kettle, Jessie, | Jessie Kettle | Actor | 1905 | 1 | |
| Kettle, Hilda, | Hilda Kettle | Actor | 1905 | 1 | |
| Krieger, Gerhard | Gerhard Krieger | Actor | 1905 | 1 | |
| Kielblock, Lieschen | Lieschen Kielblock | Actor | 1905 | 1 | |
| Kronek, Ludwig | Ludwig Kronek | Actor | 1905 | 1 | |
| Kelton, Jane | Jane Kelton | Actor | 1905 | 1 | |
| Kleipzig, Agnes | Agnes Kleipzig | Actor | 1905 | 17 | |
| Kneidinger, Rudolf | Rudolf Kneidinger | Actor | 1905 | 1 | |
| Koll, Carlo | Carlo Koll | Actor | 1905 | 1 | |
| Kroneck, Ludwig | Ludwig Kroneck | Actor | 1905 | 1 | |
| Klára, Tompa, | Tompa Klára | Actor | 1905 - 1906 | 56 | 8 |
| Kubela, - | - Kubela | Actor | 1905 - 1908 | 2 | |
| Kesting, Christian | Christian Kesting | Actor | 1905 - 1911 | 3 | |
| Knöfler, Fritz | Fritz Knöfler | Actor | 1905 - 1911 | 3 | |
| Kriete, Luise, | Luise Kriete | Actor | 1905 - 1912 | 12 | |
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