| Kingsley, Ariel | Ariel Kingsley | Actor | 1904 | 1 | |
| Konradi, Paul | Paul Konradi | Actor | 1904 | 1 | |
| Kriss, Steffy | Steffy Kriss | Actor | 1904 | 1 | |
| Kacha, Eduard | Eduard Kacha | Actor | 1904 | 1 | |
| Kazimierz, Kamiński | Kamiński Kazimierz | Actor | 1904 | 1 | |
| Kelbey, Gerald A. | Gerald A. Kelbey | Actor | 1904 | 1 | |
| Kenman, Margaret | Margaret Kenman | Actor | 1904 | 1 | 1 |
| Karasińska, Janina (?) | Janina (?) Karasińska | Actor | 1904 | 1 | |
| Kendall, Frk. | Frk. Kendall | Actor | 1904 | 1 | |
| Krajewska, Leonia | Leonia Krajewska | Actor | 1904 | 1 | |
| Kurth, Max | Max Kurth | Actor | 1904 | 1 | |
| Kingsley, Chas | Chas Kingsley | Actor | 1904 | 1 | |
| Knüpfer, Julie | Julie Knüpfer | Actor | 1904 | 1 | |
| Kirsch, Richard | Richard Kirsch | Director | 1904 | 1 | |
| Korczak-Wesołowski, Zygmunt | Zygmunt Korczak-Wesołowski | Actor | 1904 - 1905 | 2 | |
| Kotljarevski, Stefan Mladenov | Stefan Mladenov Kotljarevski | Translator | 1904 - 1905 | 2 | 1 |
| Komissarzhevskaya, Vera F. | Ве́ра Фё́доровна Комиссарже́вская (Vera F. Komissarzhevskaya) | Actor, Producer | 1904 - 1908 | 7 | 14 |
| Kirtschev, Atanas | Atanas Kirtschev | Actor | 1904 - 1909 | 8 | |
| Kafka, Rudolf | Rudolf Kafka | Actor | 1904 - 1912 | 5 | |
| Korn, Gertrud | Gertrud Korn | Actor | 1904 - 1916 | 3 | |
| Kalff, Marie | Marie Kalff | Actor | 1904 - 1928 | 2 | |
| Kraus, Arnošt | Arnošt Kraus | Translator | 1904 - 1941 | 11 | 1 |
| Kilpi, Eero | Eero Kilpi | Actor | 1904 - 1943 | 8 | 1 |
| Klein, Demeter | Demeter Klein | Actor | 1905 | 1 | |
| Kanisch, Edgar | Edgar Kanisch | Actor | 1905 | 1 | |
| Koehne, Marie | Marie Koehne | Actor | 1905 | 1 | |
| Kernic, Annie | Annie Kernic | Actor | 1905 | 1 | |
| Krasa, Rudolf | Rudolf Krasa | Actor | 1905 | 1 | |
| Kriß, Stephanie | Stephanie Kriß | Actor | 1905 | 1 | |
| Kühne, Leopoldine | Leopoldine Kühne | Actor | 1905 | 1 | |
| Kirkov, Geno | Geno Kirkov | Actor | 1905 | 1 | |
| Kolthoff, Signe | Signe Kolthoff | Actor | 1905 | 2 | |
| Knox, R. F. | R. F. Knox | Actor | 1905 | 1 | |
| Krössing, Adolf | Adolf Krössing | Actor, Director | 1905 | 2 | |
| Khol, František | František Khol | Adaptation | 1905 | 1 | 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 | |
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