| New Blood Entertainment | Toronto | — | 1 |
| Nexiko | Stockholm | 2012 | 1 |
| Nickel Odéon Dos | Madrid | — | 1 |
| Nimbus Iceland | — | — | 1 |
| Ninjin Club | — | 1954 | 1 |
| NLO TV | — | February 7, 2012 | 1 |
| Noirfilm | Karlsruhe | — | 1 |
| NoonTalk Media | — | July 2011 | 1 |
| Nordic Screen Development | — | — | 1 |
| Nordisk Film Distribution | Copenhagen | October 3, 1989 | 1 |
| Nordisk Film Sverige | Stockholm | January 16, 1990 | 1 |
| Nordkappfilm | — | — | 1 |
| North Shore Studios | North Vancouver | — | 1 |
| Norwegian Film Institute | Oslo | 1956 | 1 |
| Nova Cinema | — | 1994 | 1 |
| Nova Entertainment | — | — | 1 |
| Novoskop Film | Hamburg | — | 1 |
| Novotny & Novotny Filmproduktion | Vienna | — | 1 |
| NTV | Maslak | 1996 | 1 |
| NUT | Suginami | — | 1 |
| Oakshire Productions | — | — | 1 |
| Oberon Cinematogràfica | Barcelona | 1990 | 1 |
| Objectif 9 | — | — | 1 |
| OCS | — | January 7, 1991 | 1 |
| OddLot Entertainment | Culver City | 2001 | 1 |
| Odessa Filmworks | Ottawa | — | 1 |
| Odolttogi (Animation Studio) | — | April 1997 | 1 |
| Odyssey Entertainment | London | — | 1 |
| Okko | Saint Petersburg | 2011 | 1 |
| Okko Production | Prague | — | 1 |
| Ombetja Yehinga Organisation | Windhoek-Prosperita | 2001 | 1 |
| Omega Film GmbH | Berlin | — | 1 |
| Omnia Film | Munich | — | 1 |
| Omroep MAX | Hilversum | 2002 | 1 |
| One Astor Plaza | — | 1972 | 1 |
| ONE Championship | Kallang | July 14, 2011 | 1 |
| Onfilm | — | 1996 | 1 |
| Optimystix Entertainment | Mumbai | 2000 | 1 |
| Orange | Issy-les-Moulineaux | 1988 | 1 |
| Oriental Film | Batavia | 1940 | 1 |
| Origin Animation | Beijing | July 14, 2010 | 1 |
| Orion Classics | Los Angeles | 1982 | 1 |
| Orisono | Lucerne | 2020 | 1 |
| Orona/Stevens | — | — | 1 |
| Osakond | — | 2004 | 1 |
| Ouille Productions | Neuilly-sur-Seine | 1996 | 1 |
| Outre-Mer 1ère | Malakoff | September 14, 1954 | 1 |
| Outspoken Media | New York City | 2004 | 1 |