| M&M Productions | Copenhagen | 1995 | 5 |
| M-production | 1st Tverskaya-Yamskaya Street | 1992 | 1 |
| M.H. Films Productions | — | — | 1 |
| Macalla Teoranta | Dublin | 1997 | 1 |
| Madan Theatres | — | 1919 | 1 |
| Maddock Films | Mumbai | 2010 | 13 |
| Made in Copenhagen | Copenhagen | 2010 | 1 |
| Madefor Film | Berlin | 2020 | — |
 Madhouse | Nakano | 17 October 1972 | 26 |
| MadLove Film Factory | — | — | 1 |
| Maecenas Film- und Fernsehproduktion | Munich | — | 1 |
 Mafilm | Budapest | 19 August 1948 | 27 |
| MAG Yapım | Uşak Province | 2023 | 1 |
| Magenta Light Studios | Los Angeles | 8 March 2024 | 1 |
| Magic Light Pictures | London | 2003 | 6 |
| Magic Stone Productions | — | — | 2 |
 Magic TV | Paris | 29 March 1993 | — |
| Magmafilm | Essen | 1988 | 6 |
| Magnéto Presse | Boulogne-Billancourt | 24 July 2008 | 1 |
| Magouric Productions | Paris | 2 April 1993 | 2 |
| Mahtab Film | — | — | 3 |
| Mainstream | — | — | 2 |
 Mainz University of Applied Sciences | — | 1971 | 1 |
 Majestic Films International | Berlin | 2006 | 2 |
| Majestic Motion Picture Company | — | — | 1 |
 Makido film | Vienna, Weimar, Meidling | 2011 | — |
| Mamahyhotala | Kyiv | 2012 | — |
| Mammoth Screen | — | 24 October 2006 | — |
| Man of Action Studios | Glendale | 2005 | 2 |
| Manchester Films | Paris | 2008 | 2 |
| Manchu Entertainment | Hyderabad | — | 1 |
| Mandarin et Compagnie - Mandarin Télévision | Paris | 1995 | 28 |
| Mandarin Films Distribution | Causeway Bay | 1991 | 4 |
| Mandate Pictures | Santa Monica | 2005 | 22 |
| Manderlay | — | — | 1 |
 Mandeville Films | Burbank | 1994 | 21 |
| Mandragora Movies | — | — | 1 |
| Manga Entertainment | London | 1987 | 1 |
| Manigolda Film | — | — | 1 |
| Manikarnika Films | Mumbai | — | 2 |
| Mano Film | Zurich | 2001 | 1 |
| Manoli Films | Philippines | 2000 | 1 |
| Mantarraya Productions | Mexico City | 1998 | — |
| Manuel Ferrara Productions | — | — | 6 |
| Man’s Films | — | — | 5 |
 MAPPA | Nakano | 14 June 2011 | 4 |
| Marcusfilm | Oslo | — | 7 |
| Marea Films S.A. | Madrid | — | 1 |
| Mariska X Productions | — | 2014 | 3 |
| Mark Goodson Productions | Hollywood, New York City | May 1946 | 2 |
| Mark VII Limited | Los Angeles | 1951 | 3 |
| Mars Entertainment Group | — | 2001 | 2 |
| Mars Films | Paris | 22 June 2007 | 11 |
| Mars Media Entertainment | Moscow | November 2011 | 4 |
| Mars-Film | Munich, Berlin | — | 1 |
 Marvel Animation | Glendale | 25 January 2008 | 6 |
 Marvel Entertainment | New York City | June 1998 | 30 |
 Marvel Productions | Hollywood | 1981 | 3 |
| MarVista Entertainment | Los Angeles | 2003 | 10 |
| Mary Pickford Film Corporation | — | — | 8 |
 Marza Animation Planet | Tokyo | 2010 | 5 |
 Mascot Pictures | Los Angeles | 1927 | 7 |
 Mason Ewing Corporation | Los Angeles | 2011 | — |
| Massa d’Or Produccions | Barcelona | 1992 | 1 |
| Master-film | Moscow | 1996 | — |
| Matchbox Pictures | Sydney | 2008 | — |
 Matchstick Productions | Crested Butte | — | — |
| Matt Tolmach Productions | — | — | 1 |
 Mattel | El Segundo | 1945 | 7 |
| Matthias-Film | Berlin | — | — |
| Maurice Tourneur Productions | — | 1918 | 1 |
| Maven Screen Media | — | May 2011 | 9 |
| Max Pictures | Duren Tiga | 2011 | 11 |
| Max Productions | — | — | 1 |
 Maxim | United States | May 1995 | 1 |
| Maxima Pictures | Duren Tiga | 7 May 2004 | 13 |
| Maximal Productions | — | — | — |
| MBC Game | — | — | — |
 MBC Group | Riyadh | 18 September 1991 | 1 |
 MBC Shahid | Riyadh | 2011 | — |
 MBS | Chayamachi, Kita-ku, Osaka | 28 July 2016 | 2 |
| MCA Television | — | 1951 | 1 |
 McGraw-Hill Education | New York City | 1888 | 1 |
| Media Asia Film Distribution Company | — | 5 October 1993 | 1 |
 MEDIA sub-programme of Creative Europe | Brussels | 1990 | 2 |
| MediaCorp Raintree Pictures | — | 31 March 1996 | 3 |
| MediaNews Group | — | 1983 | 1 |
 Mediapro | Mediapro Tower | 21 April 1994 | 19 |
 Medienboard Berlin-Brandenburg | Potsdam | 2004 | 5 |
 Medienwerkstatt Franken | Bavaria | 1981 | 4 |
| Medset Film | — | 2016 | 1 |
 Medusa Film | Rome | 1964 | 172 |
| Medyapım | Istanbul | — | 3 |
 Mega Channel | — | 1989 | 2 |
 Megaherz Film und Fernsehen | Unterföhring | 1983 | — |
 Megogo | Kyiv | 22 November 2011 | 2 |
| Melenny Productions | — | — | 4 |
| Melnitsa Animation Studio | Saint Petersburg | 1999 | 12 |
| Melodie Film | — | — | 3 |
| Melusine Productions | — | 1998 | 3 |
| Memento Distribution | Paris | 4 March 2003 | 1 |
| Memfis Film | — | 1989 | 16 |
| Memfis Film Rights5 | Stockholm | 4 March 2004 | 1 |
 Men.com | — | 2003 | 1 |
| Mercenary Pictures | — | — | 4 |
| Merchant Ivory Productions | London | 1961 | 19 |
| Merkur Film | Oslo Municipality | 15 August 1936 | 9 |
| Merkur Produksjon | Oslo | 1939 | 1 |
| Merlin Films | Dublin | 1989 | 3 |
| Merseyside Film Production Fund | — | — | 1 |
| Merv Griffin Entertainment | — | 1996 | 1 |
 Messenger2050 Technologies | — | 2008 | 4 |
| Messercola Drama & Soap | — | — | 3 |
| Met Film Production | London | — | 1 |
| Meta Film | Copenhagen | 27 December 2012 | 1 |
| Meta Film Stockholm | Stockholm | 2013 | 2 |
 Metahaven | — | — | 1 |
| Meteor Film | — | 1939 | 2 |
| Meteor Studios | Montreal | 2001 | — |
| Meteoriit | Tallinn | 14 January 2013 | 4 |
| Metro | Chatsworth | 1987 | 1 |
 Metro International | Stockholm | 1995 | 1 |
 Metro-Goldwyn-Mayer | Los Angeles | 17 April 1924 | 1,347 |
| Metro-Goldwyn-Mayer Animation | Los Angeles | 1993 | 2 |
| Metro-Goldwyn-Mayer cartoon department | Culver City | 1937 | 1 |
 Metromuster | Barcelona | 2010 | 1 |
 Metronome Productions | Copenhagen | 1950 | — |
| Metropolitan Filmexport | Paris | 1978 | 4 |
 Metropolitan Opera House | — | — | 1 |
 MFE - MediaForEurope | Cologno Monzese, Amsterdam | 1993 | 5 |
| MGM Animation/Visual Arts | Culver City | 1962 | 2 |
| MIA FILM | Prague | 25 February 2010 | 1 |
 MICHAEL - Střední škola, Gymnázium a Vyšší odborná škola | Prague | 10 September 1997 | 1 |
 Michael Jacobs Productions | Walt Disney Studios | 1985 | — |
| Micro_scope | Montreal | 2002 | 10 |
 Midway Games | Chicago | 1988 | 1 |
| Mikado Film | — | 1984 | 10 |
| Mike Adriano Media | — | — | 1 |
| Miko Lee Productions | — | — | 1 |
| Mikrofilm | Oslo | 16 October 1996 | 1 |
 Milano Films | — | 1908 | 24 |
| Milestone Production | — | — | 1 |
| Milk Pictures | — | — | 1 |
| Milkyway Image | Hong Kong | 1996 | 27 |
| Millennium Film Oy | — | — | 1 |
| Millennium Films | — | — | 36 |
| Mills James | — | 1984 | 1 |
 Millstreet Films | — | — | 3 |
| Minds Eye Entertainment | Regina | 1986 | 5 |
| Minds Meet | Brussels | — | 1 |
 Minerva Film | — | 1912 | 14 |
| Minerva-Tonfilm | Berlin | — | — |
| Minimum fax | Rome | 1994 | 1 |
| Ministry of Culture and Information of Kazakhstan | Astana | 29 October 2004 | 1 |
 Ministry of National Defense of South Korea | Seoul | 17 July 1948 | 1 |
| Mint Motion Pictures | Istanbul | 1996 | 2 |
| Minxin Film Company | Shanghai | 1922 | 1 |
| Mirabai Films | New York City | 1989 | 4 |
 Miramax | Toronto, United States, Los Angeles | 1979 | 163 |
| Miramón Mendi | — | 1988 | — |
 Mirror Films | — | 23 September 1915 | — |
 Miso Film | Copenhagen | 2004 | 3 |
| Miss Wasabi Films | Barcelona | — | 2 |
| Missing Pictures | — | — | 2 |
| Mission Pictures International | — | 2008 | 2 |
| Mistrus Media | Riga | 4 January 2000 | 8 |
| Mitosfilm | Berlin | 2004 | 2 |
 Mitteldeutscher Rundfunk | Leipzig | 1992 | 9 |
| Mitteldeutsches Filmkontor | Leipzig | — | 1 |
| MMG | Asse | — | 1 |
| MNC Pictures | Jakarta | 8 January 2004 | 19 |
| Mobra Films | Bucharest | — | 1 |
| MOD Producciones | Madrid | 2007 | 22 |
| Mofac Studio | — | — | 1 |
| Moho Film | Seoul | — | 8 |
| Moiré Films | — | — | 1 |
| MOKÉP | Budapest | July 1986 | 1 |
| Moladat Studio | — | 1927 | 1 |
 Moldova-Film | Chișinău | 1952 | 24 |
| Momento Film | Stockholm | 2011 | 2 |
| Monarch Media (United States) | Santa Cruz | — | 1 |
| Monday Media | Copenhagen | 2008 | — |
| Monogatari srl | Milan | — | 1 |
 Monogram Pictures | New York City, Los Angeles | 1931 | 155 |
| Monolith Films | Warsaw | 11 January 2002 | 1 |
 Monster Media | Oslo | 2001 | 1 |
| Monster Union | — | 2016 | 1 |
| Monte Royal Pictures | Belgrade | 1994 | — |
| Monumental Pictures | Moscow | 2008 | 8 |
| Moonbow Pictures | — | 19 November 2018 | 1 |
| Moonlight film company | Seoul | 13 April 2012 | — |
| Moonlight Films | Indiana | 2008 | 2 |
| Morgan Creek Entertainment | Santa Monica | 1988 | 45 |
 Morgana film | Rome | 1914 | 3 |
| Moriarti Productions | Pasaia | 2001 | 6 |
 Moscow State Puppet Theatre named after Sergey Obraztsov | — | 1931 | 1 |
 Moser + Rosié Film | Berlin | 1968 | — |
 Moskito Television | Helsinki | 18 June 1999 | — |
| Mostra Cine | — | 2018 | 2 |
| Motel Films | — | 1995 | 7 |
| Moteur s'il vous plaît | Paris | 2005 | 2 |
| Mother Production | Paris | 31 January 2011 | 2 |
| Motion Blur | Oslo | 2012 | 2 |
| Motion Picture Patents Company | United States | 1908 | — |
| Motion Pictures, S.A. | London | 1968 | 1 |
| Motlys | Oslo Municipality | — | 18 |
| Motor ApS | Copenhagen Municipality | 10 January 2018 | 2 |
 Motovun Film Festival | — | 1999 | 1 |
| Motto Pictures | Brooklyn | 2009 | 2 |
| Mount Street Film | — | — | 1 |
| Movie Walker | Chiyoda | 7 July 2011 | 2 |
| Moviechi | Mashhad | May 2021 | 5 |
| MoviePlus | — | 2005 | 1 |
| Movimento Production | Paris | — | 2 |
| Moviola Film och Television AB | — | — | 1 |
 Movistar Plus+ | Tres Cantos | 8 July 2015 | 31 |
| MPH Entertainment, Inc. | United States | 1996 | — |
| MPI Media Group | Orland Park | 1976 | 4 |
| MR Film | Vienna | 1967 | 5 |
| MRB Productions | — | — | 2 |
| MRP Matila Röhr Productions | Cable Factory, Karis | 30 January 1991 | 19 |
 MS NOW | 30 Rockefeller Plaza | 15 July 1996 | 1 |
| MTI Home Video | Miami | 1984 | 1 |
| MTL Maxfilm | Warsaw | 1992 | 1 |
| MTM Enterprises | — | 1969 | 1 |
| MTM Medien & Television München | Munich | — | 2 |
 MTV | New York City | August 1981 | 3 |
| MTV Channel | Colombo | 1992 | 1 |
 MTV Entertainment Studios | Hollywood | 1991 | 1 |
 MTV Films | Los Angeles | 1996 | 42 |
| Mukta Arts | Mumbai | 1978 | 4 |
| Mult.ru | Saint Petersburg | — | — |
| Multi Film | — | 1999 | — |
| Multimedia Film- und Fernsehproduktion | Hamburg | — | 2 |
| Multivision Plus | Jakarta | 18 April 1990 | 22 |
| Mundial Film | Barcelona | 1925 | 1 |
 MundoFox (Latin America) | Latin America | — | — |
| Muse Entertainment Enterprises | Montreal | 1998 | 4 |
 Museu de la Música de Barcelona | L'Auditori | 29 May 1946 | 1 |
| Mushroom Pictures | — | — | 3 |
 Music Box Films | Chicago | 2007 | 2 |
 Mutant Enemy Productions | Los Angeles | 1996 | 2 |
| Mutant Koala Pictures | — | — | 1 |
| Mutante Filmes | — | — | 1 |
| Muti Films | Cape Town | 1998 | 2 |
| MWM Studios | Culver City | 2001 | 13 |
| My Deer Films | — | — | 1 |
| MY TV Productions | — | 2005 | — |
| Myriad Pictures | Santa Monica | 1999 | 8 |
| Myriapod Productions | — | — | 1 |
 Mystic Story | Seoul | 2001 | 2 |
| Myth Film | — | 1997 | — |
| Mythberg Films | Budapest | — | 1 |
| Mythos Production | — | — | 2 |
| Myung Films | Jongno District | 1995 | 33 |
 Métropole du Grand Nancy | Nancy | 1996 | 1 |
| Māori Broadcast Funding Agency | Wellington | 1989 | 1 |