| Magnéto Presse | Boulogne-Billancourt | July 24, 2008 | 1 |
| Mainframe Films and Television Productions | Lagos | 1991 | 1 |
| Mainz University of Applied Sciences | — | 1971 | 1 |
| Makino Film Productions | — | 1923 | 1 |
| Maljack Productions | — | — | 1 |
| Manchu Entertainment | Hyderabad | — | 1 |
| Manderlay | — | — | 1 |
| Mandragora Movies | — | — | 1 |
| Manex Visual Effects | Alameda | — | 1 |
| Manfred Durniok Produktion | Berlin | — | 1 |
| Manga Entertainment | London | 1987 | 1 |
| Manglobe | Suginami | 2002 | 1 |
| Manifold Productions | — | 1977 | 1 |
| Mano Film | Zurich | 2001 | 1 |
| Manoli Films | Philippines | 2000 | 1 |
| Manslaughter | — | — | 1 |
| ManyVids | — | 2014 | 1 |
| Marea Films S.A. | Madrid | — | 1 |
| Marfa Peach Company | — | — | 1 |
| Mars Entertainment | Bouvignes-sur-Meuse | — | 1 |
| Mars-Film | Munich, Berlin | — | 1 |
| Massa d’Or Produccions | Barcelona | 1992 | 1 |
| Matador Pictures | London | — | 1 |
| Matt Tolmach Productions | — | — | 1 |
| Mattel Television | United States | March 30, 2016 | 1 |
| Maverick | Burbank | 1992 | 1 |
| Max Productions | — | — | 1 |
| Maxam | — | June 24, 1991 | 1 |
| Maxim | United States | May 1995 | 1 |
| Maxlab Cinemas and Entertainments | Kochi | 2009 | 1 |
| MBC Group | Riyadh | September 18, 1991 | 1 |
| MBK Entertainment | Yeoksam-dong | 2006 | 1 |
| Mechanix Film | Hvaler Municipality | August 15, 2009 | 1 |
| Media Development Authority | — | 2003 | 1 |
| Mega Kreasi Films | — | — | 1 |
| Memento Distribution | Paris | March 4, 2003 | 1 |
| Merkur Produksjon | Oslo | 1939 | 1 |
| Merseyside Film Production Fund | — | — | 1 |
| Merv Griffin Entertainment | — | 1996 | 1 |
| Met Film Production | London | — | 1 |
| Metro International | Stockholm | 1995 | 1 |
| Metromedia | New York City | 1956 | 1 |
| Mexican Association of Independent Filmmakers | — | 1993 | 1 |
| MGM Television | Beverly Hills | 1956 | 1 |
| Midway Games | Chicago | 1988 | 1 |
| Miko Lee Productions | — | — | 1 |
| Mikrofilm | Oslo | October 16, 1996 | 1 |
| Milestone Production | — | — | 1 |