| Mars-Film | Munich, Berlin | — | 1 |
| Mate Production | Barcelona | — | 1 |
| Matt Tolmach Productions | — | — | 1 |
| Max Productions | — | — | 1 |
| Maxim | United States | May 1995 | 1 |
| Maïa Films | — | — | 1 |
| MBC Group | Riyadh | September 18, 1991 | 1 |
| MBP | Munich | — | 1 |
| MCA Television | — | 1951 | 1 |
| McGraw-Hill Education | New York City | 1888 | 1 |
| Mechanix Film | Hvaler Municipality | August 15, 2009 | 1 |
| Media Development Authority | — | 2003 | 1 |
| Media Factory | Shibuya | December 1986 | 1 |
| Media Mix Japan | Tokyo | April 2, 1993 | 1 |
| Memento Distribution | Paris | March 4, 2003 | 1 |
| Men.com | — | 2003 | 1 |
| Merseyside Film Production Fund | — | — | 1 |
| Merv Griffin Entertainment | — | 1996 | 1 |
| Meta Film | Copenhagen | December 27, 2012 | 1 |
| Metro | Chatsworth | 1987 | 1 |
| Metro International | Stockholm | 1995 | 1 |
| Metro-Goldwyn-Mayer cartoon department | Culver City | 1937 | 1 |
| Metromuster | Barcelona | 2010 | 1 |
| Metronom Studio | Moscow | — | 1 |
| Metropolitan Opera House | — | — | 1 |
| Mexican Association of Independent Filmmakers | — | 1993 | 1 |
| MGM Television | Beverly Hills | 1956 | 1 |
| MHD Concern Film | Kalverstraat | 1934 | 1 |
| Micha's Films | — | 2009 | 1 |
| Mifal HaPayis | Tel Aviv | 1951 | 1 |
| Milestone Production | — | — | 1 |
| Milfy | — | 2023 | 1 |
| Milk and Honey Pictures | Prague | February 29, 2000 | 1 |
| Mill Film | — | — | 1 |
| Millennium Film Oy | — | — | 1 |
| Mills James | — | 1984 | 1 |
| Minerva Film | Copenhagen | — | 1 |
| Minimum fax | Rome | 1994 | 1 |
| Ministry of Culture | — | January 22, 1862 | 1 |
| Ministry of Culture and Sports | Tel Aviv | 2009 | 1 |
| Ministry of Culture of France | Palais-Royal | 1959 | 1 |
| Ministry of National Defense of South Korea | Seoul | July 17, 1948 | 1 |
| Minxin Film Company | Shanghai | 1922 | 1 |
| Miracle Pictures | Santa Monica | — | 1 |
| Miyagi Television Broadcasting | Miyagi Prefecture | January 17, 1970 | 1 |
| Mobra Films | Bucharest | — | 1 |
| Modern Studios | Stockholm | — | 1 |
| Momentum Pictures | — | 1996 | 1 |