| Bærum Studiescene | Bærum Studiescene | 1944 | 2 | |
| Buffton Universtiy | Buffton Universtiy | | 1 | |
| Black Hills State University | Black Hills State University | 1999 | 1 | |
| Boulder's Upstart Crow Theatre Company | Boulder's Upstart Crow Theatre Company | 2003 – 2008 | 2 | |
| Byks 08 | Byks 08 | 2008 | 1 | |
| Banff Players | Banff Players | 2007 | 1 | |
| Black Swamp Players | Black Swamp Players | 2023 | 1 | |
| Beijing Modern Dance Company | Beijing Modern Dance Company | 2006 | 1 | |
| Beck Center for the Arts | Beck Center for the Arts | 2002 | 1 | |
| Budapesti Thália, A | A Budapesti Thália | | | |
| Borgny Hammer and Company | Borgny Hammer and Company | 1920 – 1935 | 12 | |
| Barnet Arts Festival 99 | Barnet Arts Festival 99 | 1999 | 1 | |
| Bel Image, Le | Le Bel Image | 2009 | 1 | |
| Bregenzer Festspiele | Bregenzer Festspiele | 1950 – 1978 | 2 | |
| BABU - Barneteateret fra Bydel Alnas Barne- og Ungdomsteater | BABU - Barneteateret fra Bydel Alnas Barne- og Ungdomsteater | 2010 | 1 | |
| BITEF 2003 | BITEF 2003 | 2003 | 1 | |
| Brisbane Repertory Theatre | Brisbane Repertory Theatre | 1928 | 1 | |
| Berliner Secessionsbühne | Berliner Secessionsbühne | 1900 | 4 | |
| B. Iden Payne Theatre (The Acting Company) | The Acting Company (B. Iden Payne Theatre (The Acting Company)) | 1994 – 1995 | 8 | |
| Bergen Byspill | Bergen Byspill | 2006 | 5 | |
| Bancroft Players, The | The Bancroft Players | 2004 | 1 | |
| Borba Teatro | Borba Teatro | 2024 | 1 | |
| Bonfils Theatre | Bonfils Theatre | 1974 | 1 | |
| Black Ram Theatre Company | Black Ram Theatre Company | 2010 | 15 | |
| Back Alley Productions | Back Alley Productions | 2023 | 1 | |
| Banyan Theater Company | Banyan Theater Company | 2003 – 2010 | 3 | |
| Bühnen der Stadt Essen | Bühnen der Stadt Essen | 1924 – 1937 | 9 | |
| Beijing Dance Drama and Opera Company | Beijing Dance Drama and Opera Company | 2004 | 1 | |
| Bungei Kyokai (The Literary Society) | Bungei Kyokai (The Literary Society) | 1911 – 1912 | 7 | |
| Bunka-chō | Bunka-chō (Agency for Cultural Affairs) | 2023 | 2 | |
| Belyj Teatr | Belyj Teatr | 2003 – 2006 | 2 | |
| Békés Megyei Jókai Színház | Békés Megyei Jókai Színház | 1999 | 3 | |
| Barne- og Ungdomsteatret | Barne- og Ungdomsteatret | 1991 | 1 | |
| Basler Komödie | Komödie Basel (Basler Komödie) | 1962 – 1964 | 8 | |
| Bergen Filharmoniske Orkester | Bergen Filharmoniske Orkester (Bergen Philharmonic Orchestra) | 2021 – 2024 | 3 | |
| Beijing National Theatre | Beijing National Theatre | 2006 | 1 | |
| Bright China Drama Society | Bright China Drama Society | 1935 | 1 | |
| Blanche Bates and Company | Blanche Bates and Company | 1901 | 1 | |
| Barentsfestivalen | Barentsfestivalen | 2011 | 1 | |
| Burgtheater | Burgtheater | 1884 – 2019 | 9 | |
| Burnside Players | Burnside Players | 2009 | 1 | |
| Bayerische Staatstheater | Bayerische Staatstheater | 1928 | 2 | |
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