| Oeser, Anna, | Anna Oeser | Actor | 1888 | 1 | |
| Ozoliņš, Pēteris, | Pēteris Ozoliņš | Actor, Director | 1889 | 5 | |
| Ott, Gisela | Gisela Ott | Actor | 1889 | 1 | |
| Oppel, Heinrich | Heinrich Oppel | Actor | 1889 | 2 | |
| Ott, Mr., | Mr. Ott | Actor | 1889 - 1890 | 2 | |
| Otto, Wilhelm, | Wilhelm Otto | Actor | 1889 - 1897 | 5 | |
| Osmarr, Otto, | Otto Osmarr | Actor, Director | 1889 - 1900 | 23 | |
| Osten, Emil von | Emil von Osten | Actor | 1890 | 1 | |
| Orlandini, C., | C. Orlandini | Actor | 1891 | 3 | |
| Oberle, Thomas, | Thomas Oberle | Actor | 1891 | 2 | |
| Ottomeyer, J. L., | J. L. Ottomeyer (J. L. Ottomeyer) | Actor | 1891 | 1 | |
| Oberländer, Heinrich | Heinrich Oberländer | Actor | 1891 | 1 | |
| Ottepp, Alexander | Alexander Ottepp | Actor | 1891 | 1 | |
| Outram, Leonard, | Leonard Outram | Actor, Director | 1891 - 1892 | 7 | |
| Olchowny, Teodor, | Teodor Olchowny | Actor | 1891 - 1892 | 1 | |
| Olin, Wilhelm, | Wilhelm Olin | Actor, Director | 1891 - 1919 | 2 | |
| Olszewski, Stanisław, | Stanisław Olszewski | Actor | 1892 | 1 | |
| Orlandini, Leo, | Leo Orlandini | Actor | 1892 - 1924 | 12 | |
| Olbrich, Irmgard, | Irmgard Olbrich | Actor | 1893 | 2 | |
| Onorato, Mr., | Mr. Onorato | Actor | 1893 | 2 | |
| Olander, Albert, | Albert Olander | Actor | 1893 | 2 | |
| Orlop, Hermann, | Hermann Orlop | Actor | 1893 | 1 | |
| Oppel, Georg, | Georg Oppel | Actor | 1893 | 9 | |
| Odemar, Fritz, | Fritz Odemar | Actor, Director | 1893 - 1917 | 5 | |
| Oliver, Olive, | Olive Oliver | Actor | 1894 | 2 | |
| Oßmann, Otto, | Otto Oßmann | Actor | 1894 | 1 | |
| Odilon, Helene, | Helene Odilon | Actor | 1894 - 1895 | 1 | |
| Olszewski, Edward, | Edward Olszewski | Actor | 1894 - 1902 | 3 | |
| Orling, O., | O. Orling | Designer | 1895 | 2 | |
| Olden, Hans, | Hans Olden | Actor | 1895 | 1 | |
| Orling, E., | E. Orling | Designer | 1895 | 6 | |
| Olsen, Ole, | Ole Olsen | Actor, Composer | 1895 - 1910 | 18 | 1 |
| Oppermann, Heinrich, | Heinrich Oppermann | Actor | 1895 - 1926 | 13 | |
| Oberndorfer, Siegfrid, | Siegfrid Oberndorfer | Actor | 1896 | 1 | |
| Ouvrier, M., | M. Ouvrier | Actor | 1896 | 1 | |
| Otto, Heinrich, | Heinrich Otto | Actor | 1896 | 1 | |
| Olmar, Gustav | Gustav Olmar | Actor | 1896 | 1 | |
| Otto, Harald, | Harald Otto | Actor, Director | 1896 - 1921 | 55 | |
| og Bauer, Breitner, | Breitner og Bauer | Designer | 1897 | 1 | |
| Opel, Mr., | Mr. Opel | Actor | 1898 | 1 | |
| Ockert, Mr., | Mr. Ockert | Actor | 1898 | 2 | |
| Ohde, Mr., | Mr. Ohde | Actor | 1898 | 1 | |
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