| M&M Productions | Denmark | 1995 | — | 5 |
| M-production | Russia | 1992 | — | 1 |
| M.H. Films Productions | India | — | — | 1 |
| M6 | France | March 1987 | — | 9 |
| Mac Guff | France | 1986 | — | — |
| Macalla Teoranta | Ireland | 1997 | — | 1 |
| MacGillivray Freeman Films | United States | 1963 | — | 2 |
| MACT Productions | France | — | — | 3 |
| Madan Theatres | British Raj | 1919 | — | 1 |
| Maddock Films | India | 2010 | — | 13 |
| Made in Copenhagen | Denmark | 2010 | — | 1 |
| Madefor Film | Germany | 2020 | — | — |
| Madhouse | Japan | October 17, 1972 | — | 26 |
| MadLove Film Factory | Colombia | — | — | 1 |
| Madman Entertainment | Australia | 1996 | — | 5 |
| Madragoa Films | Portugal | — | — | 5 |
| Madras Talkies | — | 1995 | — | 19 |
| Maecenas Film- und Fernsehproduktion | Germany | — | — | 1 |
| Maeda Corporation | Japan | 1919 | — | 1 |
| Maestranza Films | Spain | — | — | 4 |
| Mafilm | Hungary | August 19, 1948 | — | 27 |
| MAG Yapım | Turkey | 2023 | — | 1 |
| Magdalenafilm | Norway | — | — | 2 |
| Magellan Films | Belgium | — | — | 1 |
| Magenta Light Studios | United States | March 8, 2024 | — | 1 |
| Magenta TV (Greece) | Greece | 2008 | — | 2 |
| Magic | Germany | — | — | 1 |
| Magic Light Pictures | — | 2003 | — | 6 |
| Magic Stone Productions | United States | — | — | 2 |
| Magic TV | France | March 29, 1993 | — | — |
| Magmafilm | Germany | 1988 | — | 6 |
| Magnolia Pictures | United States | 2001 | — | 6 |
| Magnéto Presse | France | July 24, 2008 | — | 1 |
| Mago film | South Korea | — | — | 2 |
| Magouric Productions | France | April 2, 1993 | — | 2 |
| Magyar Televízió | Hungary | May 1957 | June 30, 2015 | 4 |
| Mahaka Media | Indonesia | 1992 | — | 1 |
| Mahakarya Pictures | Indonesia | 2009 | — | 1 |
| Maho Film | Japan | May 29, 2018 | — | — |
| Mahtab Film | Iran | — | — | 3 |
| Mainframe Films and Television Productions | — | 1991 | — | 1 |
| Mainstream | France | — | — | 2 |
| Mainz University of Applied Sciences | Germany | 1971 | — | 1 |
| Maipo Film | Norway | September 5, 2001 | — | 20 |
| Maison 4:3 | Canada | July 16, 2014 | — | 1 |
| Majestic Films International | Germany | 2006 | — | 2 |
| Majestic Motion Picture Company | United States | — | — | 1 |
| Makido film | Germany | 2011 | — | — |
| Making Movies | Finland | 1996 | — | 12 |
| Makino Film Productions | Japan | 1923 | — | 1 |
| Makino Production | Japan | June 1925 | October 1931 | — |
| Maljack Productions | United States | — | — | 1 |
| Malpaso Productions | United States | 1967 | — | 45 |
| Malva | Ukraine | 1993 | — | 1 |
| Mamahyhotala | Ukraine | 2012 | — | — |
| Mammoth Screen | United Kingdom | October 24, 2006 | — | — |
| Man of Action Studios | United States | 2005 | — | 2 |
| Manchester Films | France | 2008 | — | 2 |
| Manchu Entertainment | — | — | — | 1 |
| Mandalay Entertainment | United States | 1995 | — | 14 |
| Mandalay Pictures | — | May 27, 1995 | — | 17 |
| Mandarin et Compagnie - Mandarin Télévision | — | 1995 | July 28, 2019 | 28 |
| Mandarin Films Distribution | Hong Kong | 1991 | — | 4 |
| Mandate Pictures | United States | 2005 | 2013 | 22 |
| Manderlay | United Kingdom | — | — | 1 |
| Mandeville Films | United States | 1994 | — | 21 |
| Mandragora Movies | Romania | — | — | 1 |
| Manex Visual Effects | United States | — | — | 1 |
| Manfred Durniok Produktion | Germany | — | — | 1 |
| Manga Entertainment | United Kingdom | 1987 | — | 1 |
| Manga Films | Spain | — | — | 4 |
| Manglobe | Japan | 2002 | September 30, 2015 | 1 |
| Manifold Productions | United States | 1977 | — | 1 |
| Manigolda Film | France | — | — | 1 |
| Manikarnika Films | India | — | — | 2 |
| Mano Film | Switzerland | 2001 | — | 1 |
| Manoli Films | — | 2000 | 2002 | 1 |
| Manslaughter | United Kingdom | — | — | 1 |
| Mantarraya Productions | Mexico | 1998 | — | — |
| Manuel Ferrara Productions | United States | — | — | 6 |
| ManyVids | Canada | 2014 | — | 1 |
| Man’s Films | Belgium | — | — | 5 |
| Maoyan entertainment | People's Republic of China | July 2015 | — | 2 |
| MAPPA | Japan | June 14, 2011 | — | 4 |
| Maran Film GmbH | Germany | 1963 | 2015 | — |
| Marc Platt Productions | United States | 2001 | — | 19 |
| March Entertainment | Canada | 1996 | — | — |
| Marcusfilm | Norway | — | — | 7 |
| Marea Films S.A. | Spain | — | — | 1 |
| Marfa Peach Company | United States | — | — | 1 |
| Mari Film | Italy | 2007 | — | 4 |
| Marianna Films | Finland | 1987 | — | 5 |
| Mariska X Productions | Netherlands | 2014 | — | 3 |
| Mark Goodson Productions | United States | May 1946 | 1998 | 2 |
| Mark Johnson | United States | — | — | 2 |
| Mark VII Limited | United States | 1951 | — | 3 |
| Marlene Film Production | Czech Republic | June 16, 2014 | — | 3 |
| Marmalade Films | Belgium | November 29, 2013 | — | 1 |
| Mars Entertainment | Belgium | — | — | 1 |
| Mars Entertainment Group | Turkey | 2001 | — | 2 |
| Mars Films | France | June 22, 2007 | — | 11 |
| Mars Media Entertainment | Russia | November 2011 | — | 4 |
| Mars-Film | Germany | — | — | 1 |
| Marv Studios | United Kingdom | 1997 | — | 15 |
| Marvel Animation | United States | January 25, 2008 | — | 6 |
| Marvel Entertainment | United States | June 1998 | March 29, 2023 | 30 |
| Marvel Productions | United States | 1981 | 1996 | 3 |
| Marvel Studios | United States | 1993 | — | 44 |
| MarVista Entertainment | United States | 2003 | — | 10 |
| Mary Pickford Film Corporation | United States | — | — | 8 |
| Marza Animation Planet | Japan | 2010 | — | 5 |
| Mascot Pictures | United States | 1927 | 1935 | 7 |
| Mashal Cinematic Organization | Pahlavi Iran | — | — | 2 |
| Mason Ewing Corporation | United States | 2011 | — | — |
| Massa d’Or Produccions | Spain | 1992 | — | 1 |
| Master-film | Russia | 1996 | — | — |
| Matador Pictures | United Kingdom | — | — | 1 |
| Matar Productions | Israel | 1993 | — | — |
| Matchbox Pictures | — | 2008 | — | — |
| Matchstick Productions | United States | — | — | — |
| Mate Production | Spain | — | — | 1 |
| Matt Tolmach Productions | United States | — | — | 1 |
| Mattel | United States | 1945 | — | 7 |
| Mattel Films | United States | September 2018 | — | 3 |
| Mattel Television | United States | March 30, 2016 | — | 1 |
| Matthias-Film | Germany | — | — | — |
| Maurice Tourneur Productions | United States | 1918 | — | 1 |
| Maven Screen Media | — | May 2011 | — | 9 |
| Maverick | — | 1992 | — | 1 |
| Maverick Films | United States | 1992 | — | 11 |
| Maverick Television | — | 1994 | — | — |
| Max Pictures | Indonesia | 2011 | — | 11 |
| Max Productions | Greece | — | — | 1 |
| Maxam | Japan | June 24, 1991 | — | 1 |
| Maxim | United States | May 1995 | — | 1 |
| Maxima Pictures | Indonesia | May 7, 2004 | — | 13 |
| Maximal Productions | France | — | — | — |
| Maximum Effort | United States | 2018 | — | 4 |
| Maxlab Cinemas and Entertainments | India | 2009 | — | 1 |
| MAXstream | Indonesia | June 2018 | — | 1 |
| May 3rd Films | — | 2003 | — | — |
| Mayflower Pictures | United Kingdom | January 25, 1937 | — | — |
| Maz & More TV Produktion | Germany | 2009 | — | — |
| Maze Pictures | Germany | 2015 | — | 3 |
| Maïa Films | France | — | — | 1 |
| MBC Game | South Korea | — | January 31, 2012 | — |
| MBC Group | Saudi Arabia | September 18, 1991 | — | 1 |
| MBC Shahid | Saudi Arabia | 2011 | — | — |
| MBK Entertainment | South Korea | 2006 | — | 1 |
| MBP | Germany | — | — | 1 |
| MBS | Japan | July 28, 2016 | — | 2 |
| MCA Television | United States | 1951 | — | 1 |
| McGraw-Hill Education | United States | 1888 | — | 1 |
| MD Entertainment | Indonesia | March 6, 2003 | — | 8 |
| MD Pictures | Indonesia | August 2002 | — | 88 |
| Mechanix Film | Norway | August 15, 2009 | — | 1 |
| Media Asia Entertainment Group | People's Republic of China | 1994 | — | 22 |
| Media Asia Film Distribution Company | — | October 5, 1993 | — | 1 |
| Media Asia Films | — | October 12, 1993 | — | 23 |
| Media Cooperation One | Germany | — | — | 1 |
| Media Development Authority | Singapore | 2003 | — | 1 |
| Media Dreams | India | 1997 | — | — |
| Media Factory | Japan | December 1986 | — | 1 |
| Media Home Entertainment | United States | 1978 | 1993 | 3 |
| Media Mix Japan | Japan | April 2, 1993 | — | 1 |
| MEDIA sub-programme of Creative Europe | Belgium | 1990 | — | 2 |
| Media-Most | Russia | 1997 | 2001 | 2 |
| MediaCorp Raintree Pictures | — | March 31, 1996 | — | 3 |
| Mediagjøglerne | Norway | — | — | 1 |
| MediaNews Group | United States | 1983 | — | 1 |
| Mediapro | Spain | April 21, 1994 | — | 19 |
| MediaPro Pictures | Romania | April 1998 | October 24, 2019 | 2 |
| Mediaset | Italy | 1978 | — | — |
| Mediaset España | Spain | March 10, 1989 | — | 8 |
| Mediaset Premium | Italy | January 20, 2005 | June 2019 | 1 |
| Mediawan | France | December 15, 2015 | — | 3 |
| Mediawan Finland | Finland | 2003 | — | 1 |
| Medienboard Berlin-Brandenburg | Germany | 2004 | — | 5 |
| Medienprojekt Wuppertal | Germany | — | — | 1 |
| Medieoperatørene | Norway | 1995 | — | 6 |
| Medset Film | France | 2016 | — | 1 |
| Medusa Film | Italy | 1964 | — | 172 |
| Medyapım | Turkey | — | — | 3 |
| Mefistofilm | Norway | — | — | 10 |
| Mega Channel | Greece | 1989 | — | 2 |
| Mega Kreasi Films | Indonesia | — | — | 1 |
| Mega-Vision Project Workshop | Hong Kong | 2010 | — | 2 |
| Megaherz Film und Fernsehen | Germany | 1983 | — | — |
| Megogo | Ukraine | November 22, 2011 | — | 2 |
| Mehboob Studio | India | 1954 | — | 8 |
| Mehregan Film | Iran | 1960 | — | 20 |
| Mei Ah Entertainment | — | 1984 | — | 5 |
| Melampo Cinematografica | Italy | 1991 | — | 4 |
| Melenny Productions | Canada | — | — | 4 |
| Melnitsa Animation Studio | Russia | 1999 | — | 12 |
| Melodie Film | Germany | — | — | 3 |
| Melusine Productions | Luxembourg | 1998 | — | 3 |
| Memento Distribution | France | March 4, 2003 | — | 1 |
| Memfis Film | Sweden | 1989 | — | 16 |
| Memfis Film Rights5 | Sweden | March 4, 2004 | May 4, 2021 | 1 |
| Memphis Film & Television | Netherlands | — | — | 2 |
| Men.com | United States | 2003 | — | 1 |
| Menuet | Belgium | — | — | 15 |
| Mer Film | Norway | 2011 | — | 3 |
| Mercenary Pictures | United States | — | — | 4 |
| Merchant Ivory Productions | United States | 1961 | — | 19 |
| Merit Motion Pictures | Canada | 1988 | — | — |
| Merkur Film | Norway | August 15, 1936 | — | 9 |
| Merkur Produksjon | Norway | 1939 | — | 1 |
| Merlin Films | Ireland | 1989 | — | 3 |
| Merryland Studio | — | 1951 | — | 5 |
| Merseyside Film Production Fund | United Kingdom | — | — | 1 |
| Merv Griffin Entertainment | United States | 1996 | — | 1 |
| Messenger2050 Technologies | United Kingdom | 2008 | — | 4 |
| Messercola Drama & Soap | Netherlands | — | — | 3 |
| Messidor Films | Spain | — | — | 5 |
| Messter Film | Germany | 1897 | 1917 | 19 |
| Met Film Production | — | — | — | 1 |
| Meta Film | Denmark | December 27, 2012 | — | 1 |
| Meta Film Stockholm | Sweden | 2013 | — | 2 |
| Metafilms | Canada | 2003 | — | 15 |
| Metahaven | Netherlands | — | — | 1 |
| Meteor Film | Norway | 1939 | — | 2 |
| Meteor Studios | Canada | 2001 | November 2007 | — |
| Meteoriit | Estonia | January 14, 2013 | — | 4 |
| Method Animation | France | 2008 | — | 8 |
| Metrafilms | Russia | 1993 | — | 3 |
| Metro | United States | 1987 | — | 1 |
| Metro International | — | 1995 | — | 1 |
| Metro Pictures | United States | 1915 | April 17, 1924 | 41 |
| Metro-Goldwyn-Mayer | United States | April 17, 1924 | — | 1,347 |
| Metro-Goldwyn-Mayer Animation | United States | 1993 | 2000 | 2 |
| Metro-Goldwyn-Mayer cartoon department | United States | 1937 | 1957 | 1 |
| Metromedia | United States | 1956 | 1997 | 1 |
| Metromuster | Spain | 2010 | June 26, 2020 | 1 |
| Metronom Studio | Russia | — | — | 1 |
| Metronome Productions | Denmark | 1950 | — | — |
| Metropolitan Filmexport | France | 1978 | — | 4 |
| Metropolitan Opera House | United States | — | — | 1 |
| Mexican Association of Independent Filmmakers | Mexico | 1993 | — | 1 |
| Mezhrabpom-Film | Soviet Union | 1928 | 1936 | 33 |
| Mezhrabpom-Rus | Soviet Union | 1923 | 1928 | 14 |
| MFE - MediaForEurope | Italy | 1993 | — | 5 |
| MGA Entertainment | United States | 1979 | — | 2 |
| MGM Animation/Visual Arts | United States | 1962 | December 1970 | 2 |
| MGM Television | United States | 1956 | — | 1 |
| MHD Concern Film | Netherlands | 1934 | 1934 | 1 |
| Mhoch2 TV | Germany | 2010 | — | — |
| MIA FILM | Czech Republic | February 25, 2010 | — | 1 |
| Micha's Films | Israel | 2009 | — | 1 |
| MICHAEL - Střední škola, Gymnázium a Vyšší odborná škola | Czech Republic | September 10, 1997 | — | 1 |
| Michael Jacobs Productions | United States | 1985 | — | — |
| Michigan films | Belgium | February 2006 | — | — |
| Micro_scope | Canada | 2002 | — | 10 |
| Midway Games | United States | 1988 | 2009 | 1 |
| Mifal HaPayis | Israel | 1951 | — | 1 |
| Mikado Film | Italy | 1984 | 2010 | 10 |
| Mike Adriano Media | United States | — | — | 1 |
| Miko Lee Productions | United States | — | — | 1 |
| Mikrofilm | Norway | October 16, 1996 | — | 1 |
| Mikros Image | France | 1985 | — | 2 |
| Milano Films | Italy | 1908 | 1926 | 24 |
| Miles Films | Indonesia | — | — | 8 |
| Milestone Production | Canada | — | — | 1 |
| Milfy | United States | 2023 | — | 1 |
| Mili Pictures Worldwide | People's Republic of China | 2012 | — | 2 |
| Milk and Honey Pictures | Czech Republic | February 29, 2000 | — | 1 |
| Milk Pictures | South Korea | — | — | 1 |
| Milkyway Image | — | 1996 | — | 27 |
| Mill Film | — | — | — | 1 |
| Millar/Gough Ink | United States | 1995 | — | 1 |
| Millennium Film Oy | Finland | — | — | 1 |
| Millennium Films | United States | — | — | 36 |
| Millennium Media | United States | 1992 | — | 75 |
| Miller-Boyett Productions | United States | 2015 | 2020 | 3 |
| Mills James | United States | 1984 | — | 1 |
| Millstreet Films | Netherlands | — | — | 3 |
| Minds Eye Entertainment | Canada | 1986 | — | 5 |
| Minds Meet | Belgium | — | — | 1 |
| Minerva Film | Italy | 1912 | 1956 | 14 |
| Minerva Film | Denmark | — | — | 1 |
| Minerva Movietone | India | 1936 | — | 2 |
| Minerva Pictures | Italy | 1953 | — | 4 |
| Minerva-Tonfilm | Germany | — | — | — |
| Mingxing Film Company | People's Republic of China | February 1922 | 1937 | 4 |
| Minimum fax | Italy | 1994 | — | 1 |
| Ministry of Culture | Italy | 1974 | — | 10 |
| Ministry of Culture | Romania | January 22, 1862 | — | 1 |
| Ministry of Culture | Egypt | 1958 | — | 1 |
| Ministry of Culture and Information of Kazakhstan | Kazakhstan | October 29, 2004 | — | 1 |
| Ministry of Culture and Sports | Israel | 2009 | — | 1 |
| Ministry of Culture of France | France | 1959 | — | 1 |
| Ministry of Culture of Russia | Russia | May 12, 2008 | — | 4 |
| Ministry of National Defense of South Korea | South Korea | July 17, 1948 | — | 1 |
| Ministry of Public Enlightenment and Propaganda | Nazi Germany | 1933 | 1945 | 1 |
| Minnow Mountain | United States | — | — | 1 |
| Minor Film | Estonia | 1996 | — | — |
| Minoria Absoluta | Spain | 2006 | — | 6 |
| Mint AB | Sweden | 1998 | — | 2 |
| Mint Motion Pictures | Turkey | 1996 | — | 2 |
| Minxin Film Company | — | 1922 | — | 1 |
| Mirabai Films | — | 1989 | — | 4 |
| Miracle Pictures | United States | — | — | 1 |
| Mirage Enterprises | United States | — | — | 6 |
| Mirage Studios | — | 1983 | September 9, 2021 | 5 |
| Miramax | United States | 1979 | — | 163 |
| Miramón Mendi | Spain | 1988 | — | — |
| Mirror Films | United States | September 23, 1915 | — | — |
| Mischief Films | Austria | — | — | 4 |
| Miso Film | Denmark | 2004 | — | 3 |
| Miss Wasabi Films | Spain | — | — | 2 |
| Missaghieh Studio | Iran | December 7, 1959 | — | 40 |
| Missing Pictures | Estonia | — | — | 2 |
| Mission Pictures International | United States | 2008 | — | 2 |
| Mistrus Media | Latvia | January 4, 2000 | — | 8 |
| Mitosfilm | Germany | 2004 | — | 2 |
| Mitteldeutscher Rundfunk | Germany | 1992 | — | 9 |
| Mitteldeutsches Filmkontor | Germany | — | — | 1 |
| Miyagi Television Broadcasting | Japan | January 17, 1970 | — | 1 |
| Miyu Productions | France | May 2009 | — | 1 |
| Mizan Productions | Indonesia | — | — | 2 |
| Mjölk Production | Finland | — | — | 1 |
| MK2 Films | France | 1969 | — | 15 |
| Mm2 Entertainment | — | 2008 | — | 7 |
| MMC Movies | Germany | — | — | 2 |
| MMC Studios Cologne | Germany | — | — | 2 |
| MMG | Belgium | — | — | 1 |
| MNC Pictures | Indonesia | January 8, 2004 | — | 19 |
| MNP Entreprise | — | 2000 | 2010 | 1 |
| Mobra Films | Romania | — | — | 1 |
| Moco Films | United Kingdom | — | — | 1 |
| MOD Producciones | Spain | 2007 | — | 22 |
| Modern Studios | Sweden | — | — | 1 |
| Modern Theatres | India | 1935 | 1982 | 15 |
| Mofac Studio | South Korea | — | — | 1 |
| Mohawk Productions | United States | 1991 | — | — |
| Moho Film | South Korea | — | — | 8 |
| MOIN Filmförderung Hamburg Schleswig-Holstein | Germany | — | — | — |
| Moiré Films | Spain | — | — | 1 |
| Mojang Studios | Sweden | 2009 | — | 1 |
| Mojave Desert | United States | — | — | 1 |
| MOKÉP | Hungary | July 1986 | — | 1 |
| Moladat Studio | Israel | 1927 | 1934 | 1 |
| Moldova-Film | Moldova | 1952 | — | 24 |
| Momento Film | Sweden | 2011 | — | 2 |
| Momentum Pictures | Canada | 1996 | — | 1 |
| Monarch Media (United States) | United States | — | — | 1 |
| Monday Media | Denmark | 2008 | — | — |
| Mongolkino | Mongolia | 1935 | — | 58 |
| Monkey Pack Films | — | — | — | 1 |
| Monkeypaw Productions | United States | January 31, 2012 | — | 7 |
| Monochrom | Austria | 1993 | — | 2 |
| MONOfilm | Estonia | 1993 | — | 1 |
| Monogatari srl | Italy | — | — | 1 |
| Monogram Pictures | United States | 1931 | — | 155 |
| Monolith Films | Poland | January 11, 2002 | — | 1 |
| Monrovia Feature Film Company | United States | — | — | 2 |
| Monsoon Films | — | 2010 | — | 1 |
| Monsta Studios | Malaysia | September 15, 2009 | — | 1 |
| Monster Media | Norway | 2001 | — | 1 |
| Monster Union | South Korea | 2016 | — | 1 |
| Monte Royal Pictures | Serbia | 1994 | — | — |
| Monumental Pictures | Russia | 2008 | 2011 | 8 |
| Mook Animation | Japan | 1986 | — | 1 |
| Moonbow Pictures | United States | November 19, 2018 | — | 1 |
| Moonlight film company | South Korea | April 13, 2012 | — | — |
| Moonlight Films | — | 2008 | — | 2 |
| MoonScoop Group | France | 1990 | January 24, 2014 | 2 |
| More4 | United Kingdom | 2005 | — | 2 |
| Morena Films | Spain | 1999 | — | 22 |
| Morgan Creek Entertainment | United States | 1988 | — | 45 |
| Morgana film | Italy | 1914 | 1915 | 3 |
| Moriarti Productions | — | 2001 | — | 6 |
| Moscow State Puppet Theatre named after Sergey Obraztsov | Russia | 1931 | — | 1 |
| Moser + Rosié Film | Germany | 1968 | 2013 | — |
| Moser Baer | India | 1983 | September 20, 2018 | 1 |
| Mosfilm | Russia | January 30, 1920 | — | 997 |
| Moskino | Russia | — | — | 1 |
| Moskito Television | Finland | June 18, 1999 | — | — |
| Moskus film | Norway | 2009 | — | 1 |
| Most Production | Turkey | — | — | 2 |
| Mostra Cine | Argentina | 2018 | — | 2 |
| Motel Films | Netherlands | 1995 | — | 7 |
| Moteur s'il vous plaît | — | 2005 | — | 2 |
| Mother Production | France | January 31, 2011 | — | 2 |
| Motion Blur | Norway | 2012 | — | 2 |
| Motion Picture & General Investment | — | 1955 | 1989 | 3 |
| Motion Picture Corporation of America | United States | 1986 | — | 16 |
| Motion Picture Patents Company | United States | 1908 | 1915 | — |
| Motion Pictures, S.A. | United Kingdom | 1968 | — | 1 |
| Motlys | Norway | — | — | 18 |
| Motor ApS | Denmark | January 10, 2018 | — | 2 |
| Motovun Film Festival | Croatia | 1999 | — | 1 |
| Motto Pictures | — | 2009 | — | 2 |
| Mount Street Film | Italy | — | — | 1 |
| Mount Zion Film Productions | Nigeria | — | — | 2 |
| Mountain River Films | — | 2010 | — | 1 |
| Move Movie | France | July 15, 2001 | — | 2 |
| Movie Central | Canada | February 1983 | March 2016 | 1 |
| Movie Masters | Netherlands | — | — | 1 |
| Movie Walker | Japan | July 7, 2011 | — | 2 |
| Moviechi | Iran | May 2021 | — | 5 |
| MovieMakers | Sweden | — | — | 7 |
| Moviemax | Italy | 2001 | 2015 | 3 |
| MoviePlus | Israel | 2005 | — | 1 |
| Movieweb | Italy | — | — | 1 |
| Movimento Production | France | — | — | 2 |
| Moving Picture Company | — | 1970 | — | 8 |
| Moving Picture Institute | United States | — | — | 7 |
| Moving Puppet | France | October 9, 2006 | — | — |
| Moviola Film och Television AB | Sweden | — | — | 1 |
| Movistar Plus+ | Spain | July 8, 2015 | — | 31 |
| MPH Entertainment, Inc. | United States | 1996 | — | — |
| MPhilms | Slovakia | October 16, 2010 | — | 1 |
| MPI Media Group | — | 1976 | — | 4 |
| MPL Communications | United Kingdom | 1970 | — | 2 |
| Mpower Pictures | United States | 2007 | — | 4 |
| MR Film | Austria | 1967 | — | 5 |
| MRB Productions | United States | — | — | 2 |
| MRC | — | 2006 | — | 30 |
| MRP Matila Röhr Productions | Finland | January 30, 1991 | December 29, 2025 | 19 |
| MS NOW | United States | July 15, 1996 | — | 1 |
| MTI Home Video | — | 1984 | — | 1 |
| MTL Maxfilm | Poland | 1992 | — | 1 |
| MTM Enterprises | United States | 1969 | 1998 | 1 |
| MTM Medien & Television München | Germany | — | — | 2 |
| MTV | United States | August 1981 | — | 3 |
| MTV Channel | Sri Lanka | 1992 | — | 1 |
| MTV Entertainment Studios | United States | 1991 | August 7, 2025 | 1 |
| MTV Films | United States | 1996 | — | 42 |
| MTV Oy | Finland | April 29, 1957 | — | 5 |
| Mubi | United Kingdom | 2007 | — | 3 |
| Mukta Arts | India | 1978 | — | 4 |
| Mulakuppadam Films | India | 2007 | — | — |
| Mult.ru | Russia | — | — | — |
| Multi Film | Estonia | 1999 | — | — |
| Multifilmes | Brazil | 1952 | 1954 | 1 |
| Multimedia Film- und Fernsehproduktion | Germany | — | — | 2 |
| Multivision Plus | Indonesia | April 18, 1990 | — | 22 |
| Mundial Film | Spain | 1925 | 1965 | 1 |
| MundoFox (Latin America) | — | — | July 2017 | — |
| Murmur | Japan | — | — | 1 |
| Muse Entertainment Enterprises | Canada | 1998 | — | 4 |
| Museu de la Música de Barcelona | Spain | May 29, 1946 | — | 1 |
| Mushi Production | Japan | 1961 | November 1973 | 7 |
| Mushroom Pictures | Australia | — | — | 3 |
| Music Box Films | United States | 2007 | — | 2 |
| Mutant Enemy Productions | United States | 1996 | — | 2 |
| Mutant Koala Pictures | Finland | — | — | 1 |
| Mutante Filmes | Portugal | — | — | 1 |
| Muteki | Japan | 2008 | — | — |
| Muti Films | South Africa | 1998 | — | 2 |
| Mutual Film Corporation | United States | July 1906 | 1918 | 13 |
| MWM Studios | — | 2001 | — | 13 |
| My Deer Films | Spain | — | — | 1 |
| MY TV Productions | Israel | 2005 | — | — |
| My Way Film Company Limited | Hong Kong | 1981 | — | 5 |
| Myriad Pictures | United States | 1999 | — | 8 |
| Myriapod Productions | United States | — | — | 1 |
| Mystic Story | South Korea | 2001 | — | 2 |
| Myth Film | Estonia | 1997 | — | — |
| Mythberg Films | Hungary | — | — | 1 |
| Mythos Production | Greece | — | — | 2 |
| Mythri Movie Makers | India | — | — | 11 |
| Myung Films | South Korea | 1995 | — | 33 |
| Méditerranée Cinéma Productions | France | — | — | 1 |
| Métropole du Grand Nancy | France | 1996 | — | 1 |
| Māori Broadcast Funding Agency | New Zealand | 1989 | — | 1 |