| Bankable Productions | — | — | 1 |
| Baram Pictures | — | — | 1 |
| Barber-Birnbaum | — | — | 1 |
| Barefoot Films | Berlin | 2004 | 1 |
| Barret Cooperativa | Valencia | 2008 | 1 |
| Barré Studio | — | 1914 | 1 |
| Barunson Studio | — | — | 1 |
| Batabat | Barcelona | — | 1 |
| Batavia Pictures | — | — | 1 |
| Bathysphere productions | 10ᵗʰ arrondissement of Paris | — | 1 |
| Bavaria Entertainment | Cologne | 1996 | 1 |
| Bavaria-Filmkunst | — | — | 1 |
| Baya Films | — | — | 1 |
| BBC Earth | — | 2015 | 1 |
| BBC Persian Television | Broadcasting House | 2009 | 1 |
| BBC Studios | London | April 2016 | 1 |
| Beate Uhse | Hamburg | 1981 | 1 |
| Beatrice Film | Rome | — | 1 |
| Bedlam Productions | London | — | 1 |
| Bedrock Studios | — | — | 1 |
| Bee Train | Kichijōji | 1997 | 1 |
| Bee Vine Pictures | — | 2007 | 1 |
| Beijing Gehua CATV Network Co.,Ltd. | Beijing | — | 1 |
| Bel Air Classiques | Paris | 2004 | 1 |
| Belarus Free Theatre | — | March 30, 2005 | 1 |
| Belgacom 11 | — | — | 1 |
| Believe Pictures | United States | 2003 | 1 |
| Benecé Produccions | — | — | 1 |
| Bento Box Entertainment | North Hollywood | 2009 | 1 |
| Berliner Ensemble | Theater am Schiffbauerdamm | 1949 | 1 |
| Best Brains | Eden Prairie | 1988 | 1 |
| Beta Fiction Spain | Madrid | 2022 | 1 |
| Big Things Films | Dublin | 2024 | 1 |
| Bild- und Filmamt | — | 1917 | 1 |
| BIND | Amsterdam | — | 1 |
| Bioscop | Prague | 2002 | 1 |
| Bioware | Edmonton | February 1995 | 1 |
| Bir Film | Istanbul | 2002 | 1 |
| Bitters End | — | April 22, 1994 | 1 |
| BKP production | Prague | October 11, 2000 | 1 |
| Black Lion Pictures | Sotkamo | March 28, 2012 | 1 |
| Black Spark Film & TV | — | — | 1 |
| Black Walk | Whitby | 1990 | 1 |
| Blacksmith | Paris | December 20, 2022 | 1 |
| Blankface | Seinäjoki | — | 1 |
| Block 2 Distribution | Hong Kong | 1994 | 1 |
| Bloomberg L.P. | 731 Lexington Avenue | October 1981 | 1 |
| Blue eyes Fiction | Munich | — | 1 |