| B's International | Higashiyama | 1990 | 1 |
| B-Reel | Stockholm | 1999 | 3 |
| B-Reel Films | — | — | 5 |
| B. A. Entertainment | — | — | 1 |
| B92 | Belgrade | 1989 | 1 |
| Babelsberg Studio | Potsdam | 1912 | 16 |
| Baby Einstein | Atlanta | 1996 | 1 |
| Babyjane Productions | — | — | 1 |
| Babylon'13 | — | 2013 | 1 |
| BAC Films | Paris | 1986 | 10 |
| Bagdasarian Productions | Santa Barbara | 1981 | 5 |
| Bainet Media | Aia, Madrid, Bilbao | 1992 | 2 |
| Balaji Motion Pictures | Mumbai | 2002 | 26 |
| Balaji Telefilms | Mumbai | 1994 | 9 |
| Balboa 2 | Hvidovre | 1997 | 1 |
| BALDR Film | Amsterdam | — | 2 |
| Baldur Film | Seltjarnarnes | — | 1 |
| Baleuko | Durango | 1993 | 8 |
| Bally Sports North | Minneapolis | 1986 | — |
| Bally Sports Ohio | Cleveland | 1989 | — |
| Bally Sports Sun | Orlando | 1988 | — |
| Bally Sports Wisconsin | Milwaukee | 2007 | — |
| Balti Video | Tallinn | February 3, 1995 | 1 |
| Baltic Film Production | Tallinn | May 18, 1998 | 3 |
| Bambú Producciones | Pozuelo de Alarcón | 2007 | 3 |
| Bandai Namco Arts | Tokyo | April 2018 | 2 |
| Bang Bros | Miami | 2004 | 1 |
| Bang Zoom! Entertainment | Bang Zoom! Studios | 1993 | 1 |
| Bang! | — | — | 1 |
| Bangumi | rue Cauchy | June 15, 2011 | — |
| Banijay Entertainment | London | July 9, 2026 | — |
| Banijay Entertainment S.A. | Paris | 2008 | — |
| Banijay Nordics | Sweden | — | 1 |
| Bankable Productions | — | — | 1 |
| Baram Pictures | — | — | 1 |
| Baram Pictures Corp. | Seoul | February 16, 2017 | — |
| Barbara Moorse Workshop | Munich | — | 2 |
| Barber-Birnbaum | — | — | 1 |
| Barefoot Films | Berlin | 2004 | 1 |
| Barrandov Film Studio | Prague | 1957 | 52 |
| Barret Cooperativa | Valencia | 2008 | 1 |
| Barris Industries | — | 1965 | 3 |
| Barry Sonnenfeld/Josephson | — | — | 2 |
| Barré Studio | — | 1914 | 1 |
| Barton Films | Bilbao | 1992 | 2 |
| Barunson Studio | — | — | 1 |
| Basic Pictures | Hong Kong | 2002 | 5 |
| Batabat | Barcelona | — | 1 |
| Batavia Pictures | — | — | 1 |
| Bathysphere productions | 10ᵗʰ arrondissement of Paris | — | 1 |
| Batjac Productions | — | 1956 | 14 |
| Bavaria Entertainment | Cologne | 1996 | 1 |
| Bavaria Fiction | Geiselgasteig | 2007 | — |
| Bavaria Film | Geiselgasteig | 1919 | 70 |
| Bavaria-Filmkunst | — | — | 1 |
| Baya Films | — | — | 1 |
| Bayerischer Rundfunk | Munich | 1945 | 16 |
| Bazelevs Company | Moscow | 1994 | 43 |
| Bazmark | Sydney | 1997 | 4 |
| BBC Cymru Wales | Broadcasting House | 1964 | 3 |
| BBC Earth | — | 2015 | 1 |
| BBC Film | Broadcasting House | 1990 | 129 |
| BBC One | London | November 2, 1936 | 4 |
| BBC Persian Television | Broadcasting House | 2009 | 1 |
| BBC Studios | London | April 2016 | 1 |
| BBC Television | London | 1927 | 2 |
| Beate Uhse | Hamburg | 1981 | 1 |
| Beatrice Film | Rome | — | 1 |
| Bedford Falls Productions | Santa Monica | 1985 | 7 |
| Bedlam Productions | London | — | 1 |
| Bedrock Studios | — | — | 1 |
| Bee Train | Kichijōji | 1997 | 1 |
| Bee Vine Pictures | — | 2007 | 1 |
| Behindwoods.com | Chennai | 2004 | — |
| Beijing Film Studio | — | 1949 | 40 |
| Beijing Gehua CATV Network Co.,Ltd. | Beijing | — | 1 |
| Bel Air Classiques | Paris | 2004 | 1 |
| Bel Ami | Bratislava | 1993 | — |
| Belarus Free Theatre | — | March 30, 2005 | 1 |
| Belga Productions | Braine-l'Alleud | — | 3 |
| Belgacom 11 | — | — | 1 |
| Belgian Radio and Television Broadcasting | — | May 18, 1960 | 2 |
| Believe Pictures | United States | 2003 | 1 |
| Belvision Studios | Brussels-Capital Region | 1956 | 4 |
| Benecé Produccions | — | — | 1 |
| Bento Box Entertainment | North Hollywood | 2009 | 1 |
| Berlanti Productions | — | — | 3 |
| Berliner Ensemble | Theater am Schiffbauerdamm | 1949 | 1 |
| Best Brains | Eden Prairie | 1988 | 1 |
| BET | Washington, D.C. | July 1983 | 2 |
| Beta Fiction Spain | Madrid | 2022 | 1 |
| Beta Film | Oberhaching | 1959 | 5 |
| Bez Buslou Arts | — | 2012 | 3 |
| Bidel Irania | — | 2011 | 3 |
| Bidibul Productions | — | 2009 | 8 |
| Big Bang Media | — | 2009 | — |
| Big Idea Entertainment | Universal City | 1989 | 17 |
| Big Soul Productions | Toronto | 1999 | — |
| Big Talk Studios | London | 1994 | 7 |
| Big Things Films | Dublin | 2024 | 1 |
| Big Ticket Entertainment | Hollywood | 1994 | — |
| Bild- und Filmamt | — | 1917 | 1 |
| Billionfold Inc. | Burbank | 2003 | — |
| BiM Distribuzione | Rome | 1983 | 12 |
| BIND | Amsterdam | — | 1 |
| Biograph Company | New York City | December 1895 | 61 |
| Bioscop | Prague | 2002 | 1 |
| Bioware | Edmonton | February 1995 | 1 |
| Bir Film | Istanbul | 2002 | 1 |
| Bitters End | — | April 22, 1994 | 1 |
| BKM Film | — | — | 4 |
| BKP production | Prague | October 11, 2000 | 1 |
| Black Label Media | — | 2013 | 8 |
| Black Lion Pictures | Sotkamo | March 28, 2012 | 1 |
| Black Orange | — | November 2005 | 2 |
| Black Spark Film & TV | — | — | 1 |
| Black Star | Moscow | 2006 | — |
| Black Walk | Whitby | 1990 | 1 |
| Blackfella Films | Sydney | 1992 | — |
| Blacksmith | Paris | December 20, 2022 | 1 |
| Blair Entertainment | New York City | 1970 | — |
| Blankface | Seinäjoki | — | 1 |
| Blibli | — | 2010 | 2 |
| Blind Spot Pictures | Hermanninmäki | 1997 | 4 |
| Blinding Edge Pictures | Berwyn | 1999 | 16 |
| Block 2 Distribution | Hong Kong | 1994 | 1 |
| Bloody Disgusting | — | 2001 | 5 |
| Bloomberg L.P. | 731 Lexington Avenue | October 1981 | 1 |
| Blue Circle | Amsterdam | 2004 | — |
| Blue eyes Fiction | Munich | — | 1 |
| Bluebox Limited | Bettendorf | 2001 | 1 |
| Blueeyes Productions | — | — | 4 |
| Blueming Pictures GmbH | Düsseldorf | December 5, 2024 | 1 |
| Blumhouse Productions | Los Angeles | 2000 | 92 |
| Blur Studio | Venice | 1995 | 3 |
| BMG Music Publishing | New York City | 1987 | 1 |
| BNN | Hilversum | August 15, 1997 | 1 |
| BNP Paribas | Paris | 1848 | 2 |
| Bob Film Sweden | Stockholm | — | 6 |
| Bobbs-Merrill Company | Indianapolis | 1850 | 1 |
| Boje Buck Produktion | Berlin | — | 1 |
| Bold Films | Los Angeles | 2007 | 8 |
| Bolshoi Theatre | Moscow | March 28, 1776 | 1 |
| Bombay Talkies | Malad | 1934 | 7 |
| Bonfire Legend | Dallas | 2016 | 3 |
| Boom! Studios | Los Angeles | 2005 | 2 |
| Booster Project | — | — | 3 |
| Bophana Center | Phnom Penh | December 4, 2006 | 2 |
| Borough Film | — | — | 1 |
| Boréal films | Barcelona | 1916 | 2 |
| Bos Bros. Film & TV Productions | Amsterdam | — | 6 |
| Boshra Film | Tehran | — | — |
| Bosna film | Sarajevo | 1947 | 4 |
| Boulder Media | Dublin | 2000 | 1 |
| BOXMEDIA | Seoul | 2009 | — |
| Brainpool TV | Mülheim | November 28, 1994 | — |
| Brandtfilm | Kleinmachnow | 1973 | — |
| Brann-film | — | 1953 | 2 |
| Brazzers | — | 2004 | 5 |
| BRB Internacional | Barcelona | 1972 | — |
| Break Out Pictures | — | — | 1 |
| Bridgit Folman Film Gang | — | — | 1 |
| Bridie Films | London | — | 1 |
| Bright Shining City Productions | Austin | 2005 | 1 |
| Brightburn Entertainment | — | July 10, 2024 | 1 |
| Brilliant Animation Studios | Taipei | July 10, 1978 | 1 |
| Brilliant Films | — | September 14, 2005 | 1 |
| Bristol Bay Productions | Beverly Hills | 1995 | 4 |
| British Actors Film Company | — | 1916 | 8 |
| Broad Green Pictures | Los Angeles | 2014 | 2 |
| Broadcaster Audiovisual Services | — | — | 1 |
| Broadcasting Authority of Ireland | — | October 2009 | 4 |
| Broadway Video | 30 Rockefeller Plaza | 1979 | 3 |
| Broken Lizard | — | — | 2 |
| Broken Swing Productions | San Diego | 2010 | 1 |
| Broken Wall Films | Worcester | — | 1 |
| Bron Studios | British Columbia | September 21, 2010 | 30 |
| Brookstreet Pictures | Beverly Hills | 2004 | 4 |
| Brookwell McNamara Entertainment | — | 1997 | 4 |
| Broth Film | Munich | — | 1 |
| Brown Bag Films | Dublin | 1994 | 1 |
| Brownstone Productions | California | October 16, 2002 | 1 |
| Bruce Seven Productions | — | — | 1 |
| Brunswick Corporation | Lake Forest | September 15, 1845 | 1 |
| Brutal Media | Barcelona | 2009 | 3 |
| BTeam Pictures | Madrid | 2017 | 1 |
| Bubble Comics | Moscow | 2011 | 1 |
| Buendía Estudios | — | December 4, 2017 | 1 |
| BUF Compagnie | Paris | 1984 | — |
| Bufo | Hermanninmäki | 2007 | 7 |
| BulBul Film | Sandefjord | — | 2 |
| Bumi Manusia Foundation | Cianjur | June 2014 | 1 |
| Bumilangit | Jakarta | December 8, 2003 | 1 |
| Bungeishunjū | Kioichō | 1923 | 1 |
| Burbank Animation Studios | Australia | 1982 | 2 |
| Burning Heart Records | Örebro | 1993 | 1 |
| Bushey Studios | — | — | 4 |
| BuzzFeed | New York, New York City | 2006 | 2 |
| BuzzFeed Studios | — | — | 1 |
| BVS Entertainment | Los Angeles | 2001 | 11 |
| By-pass films | Quebec | — | 1 |
| Bélokapi | France | 1968 | — |
| Böcek Yapım | Istanbul | — | 5 |