| Majthényi, László | László Majthényi | Actor, Director | 1919 - 1921 | 3 | |
| Mowinckel, L. | L. Mowinckel | Musical Director | 1924 | 1 | |
| Messiter, Eric | Eric Messiter | Actor | 1921 | 1 | |
| Myron, J. | J. Myron | Director | 1921 | 1 | |
| McConnell, Frederic | Frederic McConnell | Director | 1922 - 1930 | 3 | |
| Merritt, George | George Merritt | Actor | 1922 - 1925 | 4 | |
| Marvick, Laurentia | Laurentia Marvick | Actor | 1922 | 1 | |
| Mickelson, Lawrence T. | Lawrence T. Mickelson | Actor | 1922 | 1 | |
| Mathre, Gerhard | Gerhard Mathre | Actor | 1922 | 1 | |
| May, Elsbeth | Elsbeth May | Actor | 1922 - 1990 | 3 | |
| Martelli, Arnaldo | Arnaldo Martelli | Actor | 1922 | 3 | |
| Murata, Kikuko | Kikuko Murata | Actor | 1922 | 1 | |
| Murata, Miyako | Miyako Murata | Actor | 1922 | 1 | |
| Mumdzhiev, K. | K. Mumdzhiev | Actor | 1922 | 1 | |
| Masi, Rossana | Rossana Masi | Actor | 1922 | 1 | |
| Martynov, V. | V. Martynov | Designer | 1923 | 1 | |
| Milev, Geo | Geo Milev | Translator | 1923 - 1924 | 4 | |
| McMahon, Glenn | Glenn McMahon | Actor | 1923 | 1 | |
| Metaxa, Antigoni | Antigoni Metaxa | Actor | 1923 | 1 | |
| Morino, Jone | Jone Morino | Actor | 1923 - 1929 | 5 | |
| Morino, Maria | Maria Morino | Actor | 1923 - 1924 | 2 | |
| Meussen, Gerard | Gerard Meussen | Actor | 1923 | 1 | |
| Mihalesco, M. | M. Mihalesco | Actor, Director | 1924 | 2 | |
| Mizoguchi, Saburo | Saburo Mizoguchi | Designer | 1924 - 1928 | 2 | |
| Moore, Frank | Frank Moore | Actor | 1913 - 1928 | 4 | |
| Methling, Svend | Svend Methling | Actor, Adaptation, Designer, Director | 1921 - 1964 | 9 | |
| Madsen-Wiesneck, J. | J. Madsen-Wiesneck | Designer | 1924 - 1934 | 2 | |
| Mathorne, C. | C. Mathorne | Designer | 1924 | 1 | |
| Michelsen, Randi | Randi Michelsen | Actor | 1924 - 1960 | 4 | |
| Mjøen, Sonja | Sonja Mjøen | Actor | 1924 | 1 | |
| Moseley, Kathleen | Kathleen Moseley | Actor | 1924 - 1926 | 2 | |
| Makó, Aida | Aida Makó | Actor | 1924 | 1 | |
| Magnúsdóttir, Lara | Lara Magnúsdóttir | Actor | 1924 | 1 | |
| Mihalesco, Mr. | Mr. Mihalesco | Actor | 1925 - 1934 | 4 | |
| Malmquist, Sandro | Sandro Malmquist | Designer, Director, Translator | 1925 - 1961 | 90 | |
| Millander, Sven | Sven Millander | Actor | 1925 | 1 | |
| Milton, Ernest | Ernest Milton | Actor, Director | 1925 - 1930 | 8 | |
| Morley, Malcolm | Malcolm Morley | Actor, Designer, Director | 1925 - 1933 | 10 | |
| Medved, Cirila | Cirila Medved | Actor | 1925 | 1 | |
| Márkus, László | László Márkus | Designer, Director, Translator | 1925 - 1948 | 3 | |
| Mágori, Mária | Mária Mágori | Actor | 1924 - 1943 | 53 | |
| Monck, Nugent | Nugent Monck | Director | 1925 - 1928 | 3 | |
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