| Brilliant Films | — | September 14, 2005 | 1 |
| Broadcaster Audiovisual Services | — | — | 1 |
| Broken Swing Productions | San Diego | 2010 | 1 |
| Broken Wall Films | Worcester | — | 1 |
| Broth Film | Munich | — | 1 |
| Brown Bag Films | Dublin | 1994 | 1 |
| Brunswick Corporation | Lake Forest | September 15, 1845 | 1 |
| BRUZZ | — | March 10, 2014 | 1 |
| Bungeishunjū | Kioichō | 1923 | 1 |
| Burning Heart Records | Örebro | 1993 | 1 |
| Bwrdd Ffilmiau Cymraeg | — | — | 1 |
| C More | Stockholm | 1997 | 1 |
| C-JeS Studios | Seoul | 2009 | 1 |
| C8 | Boulogne-Billancourt | October 7, 2012 | 1 |
| Cabine obscura | — | — | 1 |
| Cactus Jack Records | Houston | 2017 | 1 |
| Cados Producciones | — | — | 1 |
| CaixaForum | — | 2002 | 1 |
| Cal Vista International | — | — | 1 |
| Camera Cagliostro | Tampere | 1992 | 1 |
| Canadian Bioscope Company | — | 1912 | 1 |
| Canal 13 | Santiago | August 21, 1959 | 1 |
| Canal France International | France | 1989 | 1 |
| Cannon Films Ltd | Lancaster | 2014 | 1 |
| Canopée Production | Briançon | May 28, 2014 | 1 |
| CANVAS N | — | April 4, 2003 | 1 |
| Capa Productions | — | — | 1 |
| Capi Films | Paris | 1967 | 1 |
| Capri Entertainment | — | 2018 | 1 |
| Caribara Animation | Paris | August 2005 | 1 |
| Carson Entertainment | — | 1980 | 1 |
| Cartel | — | 2003 | 1 |
| Cartoon and puppet film studio Prague | Prague | — | 1 |
| Casa de Cinema | — | — | 1 |
| Casablanca Records | Los Angeles | 1973 | 1 |
| Castafiore Films | Madrid | — | 1 |
| CB Films | — | — | 1 |
| Cedar Park Entertainment | — | — | 1 |
| Celltrion Entertainment | — | January 4, 2012 | 1 |
| Centaure Films | — | — | 1 |
| Center for Investigative Reporting | Emeryville | 1977 | 1 |
| Center for Kapampángan Studies | — | March 8, 2002 | 1 |
| Centrul de Producție Cinematografică București | Bucharest | — | 1 |
| Centrum Film | — | 1944 | 1 |
| CFS Košutnjak | — | — | 1 |
| Channel Four Television Corporation | London | 1982 | 1 |
| Charente | — | March 4, 1790 | 1 |
| Charon Film | Kungsängen | — | 1 |