| HILLDALE | France | 2007 | — | — |
| Holland Media House | Netherlands | 1996 | 2001 | — |
| Hollandiafilm | Netherlands | April 9, 1914 | August 14, 1923 | — |
| How Full's inc. | Japan | September 1978 | — | — |
| Human Factor TV | Netherlands | — | — | — |
| Hungarofilm | Hungary | 1956 | — | — |
| Hōsō Dōga Seisaku | Japan | February 15, 1966 | — | — |
| I&u TV | Germany | 2000 | — | — |
| Iconic Events | United States | 2020 | — | — |
| Ideas del Sur | Argentina | October 28, 1996 | 2017 | — |
| Ignite Entertainment | — | 1998 | — | — |
| Igra TV | Russia | 1990 | — | — |
| Illusion | Austria–Hungary | 1906 | — | — |
| Imparja Television Pty Ltd | Australia | 1988 | — | — |
| Impossible Pictures | — | 2002 | — | — |
| Incite Pictures | United States | — | — | — |
| Industrial Light & Magic | United States | May 1975 | — | — |
| Inflagranti Film | Germany | — | — | — |
| Inflo Films | Canada | 2004 | — | — |
| Ink Pixel Films | — | 2010 | — | — |
| Internacional Films | Spain | 1920 | 1950 | — |
| Interopa Film | Germany | 1959 | — | — |
| Iris Films | Spain | 1909 | 1911 | — |
| Irwin Entertainment | United States | 2004 | — | — |
| Israel Film Service | Israel | 1956 | — | — |
| Itala-Film | Germany | — | — | — |
| ITV Anglia | United Kingdom | 1959 | — | — |
| ITV Studios Germany | Germany | 1999 | — | — |
| IWantTFC | Philippines | 2011 | — | — |
| IWC Media | — | 2004 | — | — |
| Iyuno Germany | Germany | October 14, 1949 | — | — |
| Izawa Office | Japan | January 11, 1979 | — | — |
| J. O. Studio | Empire of Japan | 1933 | 1937 | — |
| JLA Holding | France | March 4, 1999 | — | — |
| Johan Löfstedt Filmproduktion | Sweden | June 23, 1999 | June 7, 2022 | — |
| John de Mol Productions | Netherlands | — | 1994 | — |
| Jonathan M. Shiff Productions | Australia | 1988 | — | — |
| Joop van den Ende TV-Productions | Netherlands | — | 1994 | — |
| JSpictures | South Korea | 1999 | — | — |
| Juicy Pink Box | United States | 2009 | — | — |
| Jupiter Entertainment | United States | 1996 | — | — |
| Just Jenn Productions | United States | 2005 | — | — |
| KanalB | Germany | 2000 | — | — |
| KAOS | Germany | — | — | — |
| Kaos Films | United Kingdom | 2001 | — | — |
| Kapital Entertainment | United States | 2009 | — | — |
| Kataoka Chiezo Productions | Japan | May 10, 1928 | — | — |
| Kazhcha Chalachithra Vedi | India | 2001 | — | — |
| KBS Media | South Korea | 1991 | — | — |
| Kell Kümme | Estonia | 2003 | — | — |
| Kidari Studio | South Korea | — | — | — |
| Killer Minnow | United States | 2008 | — | — |
| Kim Jong-hak Production | South Korea | February 1999 | — | — |
| Kinderfilm | Germany | 2000 | — | — |
| Kino Films | Japan | April 2011 | — | — |
| Kino-Recla | Finland | 1925 | May 2, 1931 | — |
| Klaffi Productions | Finland | 1996 | — | — |
| Klappboxfilme | Germany | 2006 | — | — |
| Klaw & Erlanger | United States | 1888 | 1919 | — |
| Klever Pictures | United States | 1916 | 1919 | — |
| KM Production | France | 1994 | — | — |
| Kmax | Japan | May 1991 | — | — |
| Knight Enterprises | Canada | — | — | — |
| Kokusai Katsuei | Japan | December 6, 1919 | — | — |
| Kourtrajmé | France | August 7, 2003 | — | — |
| Košutnjak film (Firm) | — | 2005 | — | — |
| KS Pictures | — | 2015 | — | — |
| KT Studio Genie | South Korea | 2021 | — | — |
| La Blogothèque productions | France | November 12, 2009 | — | — |
| La Fábrica de la Tele | Spain | 2007 | April 30, 2024 | — |
| La Grosse Équipe | France | 2005 | — | — |
| La Osa Producciones Audiovisuales | Spain | March 12, 2024 | — | — |
| La Société du spectacle | France | 1997 | 2010 | — |
| La Société nouvelle de production | Canada | 1983 | — | — |
| Laponia Films | Spain | 1961 | — | — |
| Laterna | Japan | July 2002 | April 2010 | — |
| Lava Bear Films | United States | 2011 | — | — |
| Le cinéma du peuple | France | October 28, 1913 | — | — |
| Leeds Animation Workshop | United Kingdom | 1978 | — | — |
| Lehren | — | 1987 | — | — |
| Leni Riefenstahl-Produktion | Germany | 1940 | — | — |
| Les Cartooneurs Associés | France | 1982 | — | — |
| Les Films du Nord | France | 1995 | — | — |
| Les Valseurs | France | 2013 | — | — |
| Levitate Film | Netherlands | — | — | — |
| Lightworkers Media | United States | 2011 | — | — |
| Lignose Hörfilm System Breusing | Germany | — | — | — |
| Lillasyster produktion | Sweden | 2005 | — | — |
| Link production | France | 2005 | — | — |
| Lion Television | United Kingdom | 1997 | — | — |
| Lionsgate Television | United States | July 1997 | — | — |
| Listo-Film | Austria | — | — | — |
| Literaria Film | Germany | — | — | — |
| Logos Film | South Korea | November 29, 2000 | — | — |
| Lost Colony Entertainment | United States | 2001 | — | — |
| Louis B. Mayer Pictures Corporation | United States | 1918 | — | — |
| Lowave | France | 2002 | 2017 | — |
| Lucisano Media Group | Italy | 1992 | — | — |
| Lume Filmes | Brazil | 2006 | — | — |
| Lumière | Brazil | 1990 | — | — |