| M&M Productions | Copenhagen | 1995 | 5 |
| M.H. Films Productions | — | — | 1 |
| M6 | Neuilly-sur-Seine | March 1987 | 9 |
| MACT Productions | Paris | — | 3 |
| Madan Theatres | — | 1919 | 1 |
| Made in Copenhagen | Copenhagen | 2010 | 1 |
| Madhouse | Nakano | October 17, 1972 | 26 |
| Madragoa Films | — | — | 5 |
| Mafilm | Budapest | August 19, 1948 | 27 |
| MAG Yapım | Uşak Province | 2023 | 1 |
| Magdalenafilm | — | — | 2 |
| Magellan Films | Brussels | — | 1 |
| Magic | — | — | 1 |
| Magic Light Pictures | London | 2003 | 6 |
| Magic Stone Productions | — | — | 2 |
| Magic TV | Paris | March 29, 1993 | — |
| Magnolia Pictures | Dallas | 2001 | 6 |
| Mago film | — | — | 2 |
| Magyar Televízió | Budapest | May 1957 | 4 |
| Mahakarya Pictures | East Tebet | 2009 | 1 |
| Mahtab Film | — | — | 3 |
| Mainframe Films and Television Productions | Lagos | 1991 | 1 |
| Mainstream | — | — | 2 |
| Maison 4:3 | Montreal | July 16, 2014 | 1 |
| Majestic Films International | Berlin | 2006 | 2 |
| Majestic Motion Picture Company | — | — | 1 |
| Make Art | — | — | 2 |
| Makido film | Vienna, Weimar, Meidling | 2011 | — |
| Makino Film Productions | — | 1923 | 1 |
| Malva | Lehedzyne | 1993 | 1 |
| Mamahyhotala | Kyiv | 2012 | — |
| Man of Action Studios | Glendale | 2005 | 2 |
| Manchester Films | Paris | 2008 | 2 |
| Manchu Entertainment | Hyderabad | — | 1 |
| Mandarin Films Distribution | Causeway Bay | 1991 | 4 |
| Manderlay | — | — | 1 |
| Manex Visual Effects | Alameda | — | 1 |
| Manfred Durniok Produktion | Berlin | — | 1 |
| Manga Entertainment | London | 1987 | 1 |
| Manga Films | — | — | 4 |
| Manglobe | Suginami | 2002 | 1 |
| Manigolda Film | — | — | 1 |
| Manikarnika Films | Mumbai | — | 2 |
| Mano Film | Zurich | 2001 | 1 |
| Manslaughter | — | — | 1 |
| Manuel Ferrara Productions | — | — | 6 |
| ManyVids | — | 2014 | 1 |
| Maoyan entertainment | Beijing | July 2015 | 2 |
| Maran Film GmbH | Stuttgart, Baden-Baden | 1963 | — |
| Marc Platt Productions | Universal City | 2001 | 19 |
| March Entertainment | Toronto | 1996 | — |
| Marea Films S.A. | Madrid | — | 1 |
| Marianna Films | Helsinki | 1987 | 5 |
| Mariska X Productions | — | 2014 | 3 |
| Mark Johnson | — | — | 2 |
| Marlene Film Production | Prague | June 16, 2014 | 3 |
| Marmalade Films | Ghent | November 29, 2013 | 1 |
| Mars Entertainment | Bouvignes-sur-Meuse | — | 1 |
| Mars-Film | Munich, Berlin | — | 1 |
| Marv Studios | London | 1997 | 15 |
| Marvel Productions | Hollywood | 1981 | 3 |
| Marvel Studios | Burbank | 1993 | 44 |
| Mary Pickford Film Corporation | — | — | 8 |
| Mascot Pictures | Los Angeles | 1927 | 7 |
| Mason Ewing Corporation | Los Angeles | 2011 | — |
| Matar Productions | Tel Aviv | 1993 | — |
| Matchbox Pictures | Sydney | 2008 | — |
| Mate Production | Barcelona | — | 1 |
| Matt Tolmach Productions | — | — | 1 |
| Matthias-Film | Berlin | — | — |
| Maven Screen Media | — | May 2011 | 9 |
| Maverick Television | — | 1994 | — |
| Max Pictures | Duren Tiga | 2011 | 11 |
| Max Productions | — | — | 1 |
| Maxim | United States | May 1995 | 1 |
| Maxima Pictures | Duren Tiga | May 7, 2004 | 13 |
| Maximal Productions | — | — | — |
| Maximum Effort | New York City | 2018 | 4 |
| May 3rd Films | Washington, D.C. | 2003 | — |
| Maïa Films | — | — | 1 |
| MBC Group | Riyadh | September 18, 1991 | 1 |
| MBC Shahid | Riyadh | 2011 | — |
| MBP | Munich | — | 1 |
| MCA Television | — | 1951 | 1 |
| McGraw-Hill Education | New York City | 1888 | 1 |
| MD Entertainment | — | March 6, 2003 | 8 |
| Mechanix Film | Hvaler Municipality | August 15, 2009 | 1 |
| Media Development Authority | — | 2003 | 1 |
| Media Dreams | Chennai | 1997 | — |
| Media Factory | Shibuya | December 1986 | 1 |
| Media Mix Japan | Tokyo | April 2, 1993 | 1 |
| MEDIA sub-programme of Creative Europe | Brussels | 1990 | 2 |
| Media-Most | Moscow | 1997 | 2 |
| Medienboard Berlin-Brandenburg | Potsdam | 2004 | 5 |
| Medienwerkstatt Franken | Bavaria | 1981 | 4 |
| Medieoperatørene | Oslo | 1995 | 6 |
| Medyapım | Istanbul | — | 3 |
| Mefistofilm | — | — | 10 |
| Mega Channel | — | 1989 | 2 |
| Mega-Vision Project Workshop | — | 2010 | 2 |
| Megaherz Film und Fernsehen | Unterföhring | 1983 | — |
| Megogo | Kyiv | November 22, 2011 | 2 |
| Mehboob Studio | Mumbai | 1954 | 8 |
| Mehregan Film | Tehran | 1960 | 20 |
| Mei Ah Entertainment | Tseung Kwan O INNOPARK | 1984 | 5 |
| Melnitsa Animation Studio | Saint Petersburg | 1999 | 12 |
| Melodie Film | — | — | 3 |
| Melusine Productions | — | 1998 | 3 |
| Memento Distribution | Paris | March 4, 2003 | 1 |
| Men.com | — | 2003 | 1 |
| Menuet | — | — | 15 |
| Mercenary Pictures | — | — | 4 |
| Merchant Ivory Productions | London | 1961 | 19 |
| Merit Motion Pictures | Winnipeg | 1988 | — |
| Merkur Film | Oslo Municipality | August 15, 1936 | 9 |
| Merryland Studio | Nemom | 1951 | 5 |
| Merseyside Film Production Fund | — | — | 1 |
| Merv Griffin Entertainment | — | 1996 | 1 |
| Messenger2050 Technologies | — | 2008 | 4 |
| Messercola Drama & Soap | — | — | 3 |
| Meta Film | Copenhagen | December 27, 2012 | 1 |
| Metafilms | Montreal | 2003 | 15 |
| Meteoriit | Tallinn | January 14, 2013 | 4 |
| Method Animation | Los Angeles | 2008 | 8 |
| Metro | Chatsworth | 1987 | 1 |
| Metro International | Stockholm | 1995 | 1 |
| Metro Pictures | Los Angeles | 1915 | 41 |
| Metro-Goldwyn-Mayer Animation | Los Angeles | 1993 | 2 |
| 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 |
| Mezhrabpom-Film | — | 1928 | 33 |
| MGA Entertainment | Los Angeles | 1979 | 2 |
| MGM Animation/Visual Arts | Culver City | 1962 | 2 |
| MGM Television | Beverly Hills | 1956 | 1 |
| MHD Concern Film | Kalverstraat | 1934 | 1 |
| Mhoch2 TV | address | 2010 | — |
| Micha's Films | — | 2009 | 1 |
| Michigan films | Brussels metropolitan area | February 2006 | — |
| Mifal HaPayis | Tel Aviv | 1951 | 1 |
| Mikros Image | — | 1985 | 2 |
| Miles Films | — | — | 8 |
| Milestone Production | — | — | 1 |
| Milfy | — | 2023 | 1 |
| Milk and Honey Pictures | Prague | February 29, 2000 | 1 |
| Milkyway Image | Hong Kong | 1996 | 27 |
| Mill Film | — | — | 1 |
| Millennium Film Oy | — | — | 1 |
| Millennium Media | Los Angeles | 1992 | 75 |
| Miller-Boyett Productions | — | 2015 | 3 |
| Mills James | — | 1984 | 1 |
| Minds Eye Entertainment | Regina | 1986 | 5 |
| Minerva Film | — | 1912 | 14 |
| Minerva Film | Copenhagen | — | 1 |
| Minerva Movietone | — | 1936 | 2 |
| Minerva Pictures | Rome | 1953 | 4 |
| Minerva-Tonfilm | Berlin | — | — |
| 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 Culture of Russia | Moscow | May 12, 2008 | 4 |
| Ministry of National Defense of South Korea | Seoul | July 17, 1948 | 1 |
| Minor Film | — | 1996 | — |
| Minoria Absoluta | — | 2006 | 6 |
| Mint Motion Pictures | Istanbul | 1996 | 2 |
| Minxin Film Company | Shanghai | 1922 | 1 |
| Mirabai Films | New York City | 1989 | 4 |
| Miracle Pictures | Santa Monica | — | 1 |
| Mirage Enterprises | — | — | 6 |
| Mirage Studios | Northampton | 1983 | 5 |
| Miramax | Toronto, United States, Los Angeles | 1979 | 163 |
| Miramón Mendi | — | 1988 | — |
| Mischief Films | Vienna | — | 4 |
| Miso Film | Copenhagen | 2004 | 3 |
| Missaghieh Studio | Tehran | December 7, 1959 | 40 |
| Missing Pictures | — | — | 2 |
| Mission Pictures International | — | 2008 | 2 |
| Mistrus Media | Riga | January 4, 2000 | 8 |
| Mitteldeutscher Rundfunk | Leipzig | 1992 | 9 |
| Miyagi Television Broadcasting | Miyagi Prefecture | January 17, 1970 | 1 |
| Mizan Productions | — | — | 2 |
| MMC Movies | Cologne | — | 2 |
| MMC Studios Cologne | Cologne | — | 2 |
| Mobra Films | Bucharest | — | 1 |
| Modern Studios | Stockholm | — | 1 |
| Modern Theatres | Salem | 1935 | 15 |
| Mohawk Productions | — | 1991 | — |
| MOIN Filmförderung Hamburg Schleswig-Holstein | Hamburg | — | — |
| Momentum Pictures | — | 1996 | 1 |
| Monarch Media (United States) | Santa Cruz | — | 1 |
| Mongolkino | Songino Khairkhan | 1935 | 58 |
| Monkey Pack Films | Boulogne-Billancourt | — | 1 |
| Monkeypaw Productions | Los Angeles | January 31, 2012 | 7 |
| Monogatari srl | Milan | — | 1 |
| Monrovia Feature Film Company | Monrovia | — | 2 |
| Monsta Studios | Malaysia | September 15, 2009 | 1 |
| Monster Media | Oslo | 2001 | 1 |
| Monster Union | — | 2016 | 1 |
| Monte Royal Pictures | Belgrade | 1994 | — |
| Mook Animation | Suginami | 1986 | 1 |
| Moonbow Pictures | — | November 19, 2018 | 1 |
| Moonlight Films | Indiana | 2008 | 2 |
| More4 | London | 2005 | 2 |
| Morena Films | Madrid | 1999 | 22 |
| Morgana film | Rome | 1914 | 3 |
| Moriarti Productions | Pasaia | 2001 | 6 |
| Mosfilm | Moscow, Mosfilmovskaya Street | January 30, 1920 | 997 |
| Moskus film | — | 2009 | 1 |
| Most Production | — | — | 2 |
| Mostra Cine | — | 2018 | 2 |
| Moteur s'il vous plaît | Paris | 2005 | 2 |
| Motion Picture & General Investment | British Hong Kong | 1955 | 3 |
| Motion Picture Corporation of America | Century City | 1986 | 16 |
| Motion Picture Patents Company | United States | 1908 | — |
| Motion Pictures, S.A. | London | 1968 | 1 |
| Motlys | Oslo Municipality | — | 18 |
| Motor ApS | Copenhagen Municipality | January 10, 2018 | 2 |
| Motto Pictures | Brooklyn | 2009 | 2 |
| Mount Zion Film Productions | — | — | 2 |
| Movie Central | Toronto | February 1983 | 1 |
| Movie Masters | — | — | 1 |
| Movie Walker | Chiyoda | July 7, 2011 | 2 |
| Moviemax | Rome | 2001 | 3 |
| MoviePlus | — | 2005 | 1 |
| Movimento Production | Paris | — | 2 |
| Moving Puppet | — | October 9, 2006 | — |
| Moviola Film och Television AB | — | — | 1 |
| Movistar Plus+ | Tres Cantos | July 8, 2015 | 31 |
| MPI Media Group | Orland Park | 1976 | 4 |
| MPL Communications | New York City, London | 1970 | 2 |
| Mpower Pictures | Los Angeles | 2007 | 4 |
| MR Film | Vienna | 1967 | 5 |
| MRC | Beverly Hills | 2006 | 30 |
| MS NOW | 30 Rockefeller Plaza | July 15, 1996 | 1 |
| MTL Maxfilm | Warsaw | 1992 | 1 |
| MTM Enterprises | — | 1969 | 1 |
| MTV Channel | Colombo | 1992 | 1 |
| MTV Entertainment Studios | Hollywood | 1991 | 1 |
| MTV Oy | Helsinki | April 29, 1957 | 5 |
| Mubi | London | 2007 | 3 |
| Mukta Arts | Mumbai | 1978 | 4 |
| Mulakuppadam Films | — | 2007 | — |
| Mult.ru | Saint Petersburg | — | — |
| Multifilmes | Mairiporã | 1952 | 1 |
| MundoFox (Latin America) | Latin America | — | — |
| Murmur | — | — | 1 |
| Muse Entertainment Enterprises | Montreal | 1998 | 4 |
| Music Box Films | Chicago | 2007 | 2 |
| MWM Studios | Culver City | 2001 | 13 |
| MY TV Productions | — | 2005 | — |
| Myriapod Productions | — | — | 1 |
| Mystic Story | Seoul | 2001 | 2 |
| Myth Film | — | 1997 | — |
| Mythberg Films | Budapest | — | 1 |
| Mythos Production | — | — | 2 |
| Métropole du Grand Nancy | Nancy | 1996 | 1 |