| Badische Landesbuhne, Die | Die Badische Landesbuhne | 2006 | 18 | |
| Barentsfestivalen | Barentsfestivalen | 2011 | 1 | |
| Burgtheater | Burgtheater | 1884 – 2019 | 9 | |
| Berliner Dramatische Gesellschaft | Berliner Dramatische Gesellschaft | 1887 | 1 | |
| Betty Hennings Turne | Betty Hennings Tourneen (Betty Hennings Turne) | 1901 | 13 | |
| BUL - Spellaget | BUL - Spellaget | 2009 | 2 | |
| Bayerisches Staatsschauspiel | Bayerisches Staatsschauspiel | 1936 – 2010 | 18 | |
| Belvoir Street Theatre Company | Belvoir Street Theatre Company | 1989 – 2018 | 13 | |
| BBC TWO | BBC TWO | 1982 | 3 | |
| Beijing International Drama Festival | Beijing International Drama Festival | 2004 | 1 | |
| Bated Breath Theatre Company | Bated Breath Theatre Company | 2008 | 1 | |
| Beechwood Players, The | The Beechwood Players | 1926 | 1 | |
| Berliner Volksbühnen-Ensemble | Berliner Volksbühnen-Ensemble | 1895 | 3 | |
| Baktruppen | Baktruppen | 1988 – 1999 | 40 | |
| Bloomington Area Arts Council, The | The Bloomington Area Arts Council | 2002 | 1 | |
| Blue Bridge’ | Blue Bridge’ | 2022 | 1 | |
| Binghamton University Department of Theatre | Binghamton University Department of Theatre | 2004 | 1 | |
| Banco do Brasil | Banco do Brasil | 2002 | 1 | |
| Boston Bijou Theatre Company | Boston Bijou Theatre Company | 1907 | 1 | |
| Baylor Little Theater | Baylor Little Theater | 1928 | 2 | |
| Baccan | Baccan | 2022 | 1 | |
| Burning Coal Theatre Company | Burning Coal Theatre Company | 2001 | 1 | |
| Black Inc. | Black Inc. | 1986 | 1 | |
| Berliner Ensemble | Berliner Ensemble | 1933 – 2008 | 9 | |
| Box Theatre Company | Box Theatre Company | 2002 | 1 | |
| Ben Iden Payne’s Company | Ben Iden Payne’s Company | 1911 | 1 | |
| Brisbane Festival | Brisbane Festival | 1959 – 2006 | 2 | |
| Borkmanturnen | Borkmanturnen | 1897 | 9 | |
| Berliner Theatertreffen | Berliner Theatertreffen | 2000 – 2016 | 5 | |
| Bohurupee | Bohurupee | 1952 – 1958 | 2 | |
| Brisbane Arts Theatre | Brisbane Arts Theatre | 1990 – 1993 | 3 | |
| BBC | BBC | 1928 – 1954 | 30 | 1 |
| Black Box Teater | Black Box Teater | 2009 – 2010 | 2 | 1 |
| Bird Theatre Company | Bird Theatre Company | 2006 – 2008 | 8 | 2 |
| Bøes Film og Teater | Bøes Film og Teater | 2004 – 2011 | 192 | 3 |
| Birmingham Repertory Theatre Company | Birmingham Repertory Theatre Company | 1915 – 2013 | 54 | 3 |
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