| Canberra Repertory Society | Canberra Repertory Theatre (Canberra Repertory Society) | 1953 – 2019 | 6 | |
| Comedia Nacional | Comedia Nacional | 1954 – 2019 | 6 | |
| Chiswick Drama Circle | Chiswick Drama Circle | 1956 | 1 | |
| Christliche Landesbühne Mittelrhein | Christliche Landesbühne Mittelrhein | 1961 | 1 | |
| Canberra Theatre Trust | Canberra Theatre Trust | 1970 | 1 | |
| Carlos Kroeber Produções Artísticas | Carlos Kroeber Produções Artísticas | 1971 | 5 | |
| Creative Arts Center | Creative Arts Center | 1975 | 1 | |
| Commonwealth Savings/Trading Bank of Australia, The | The Commonwealth Savings/Trading Bank of Australia | 1976 | 1 | |
| Compagnia EFFEEGI | Compagnia EFFEEGI | 1979 – 1997 | 5 | |
| Comédie de Lyon | Comédie de Lyon | 1980 | 1 | |
| Centro Teatrale Bresciano | Centro Teatrale Bresciano | 1980 – 1988 | 13 | |
| Cooperativa La Fabbrica dell'Attore | Cooperativa La Fabbrica dell'Attore | 1981 – 1993 | 10 | |
| Court Theatre | Court Theatre | 1981 – 2022 | 3 | |
| Comédie de Rennes, La | La Comédie de Rennes | 1982 | 1 | |
| Compagnie Robert Cordier | Compagnie Robert Cordier | 1986 | 2 | |
| Centre Dramatique National d'Aubervilliers | Centre Dramatique National d'Aubervilliers | 1987 – 2004 | 5 | |
| Company B | Company B | 1988 – 1989 | 3 | |
| Centro Produzione Teatrale Nuovo Politecnico di Roma | Centro Produzione Teatrale Nuovo Politecnico di Roma | 1993 – 1994 | 2 | |
| Compass Theatre Company | Compass Theatre Company | 1993 – 1999 | 94 | |
| Centre For Asian Theatre | Centre For Asian Theatre | 1996 – 2008 | 12 | |
| Cardinal Stritch University | Cardinal Stritch University | 1997 | 1 | |
| Compagnia del Teatro Ghione, La | La Compagnia del Teatro Ghione | 1998 – 1999 | 3 | |
| Century Center for the Performing Arts | Century Center for the Performing Arts | 1998 – 2002 | 12 | |
| Companhia Teatral do Chiado | Companhia Teatral do Chiado | 1998 – 2005 | 2 | |
| China National Experimental Theatre (CNET) | China National Experimental Theatre (CNET) | 1998 – 2006 | 3 | |
| Commonweal Theatre Company | Commonweal Theatre Company | 1998 – 2017 | 48 | |
| Compagnia Spazio Zero | Compagnia Spazio Zero | 1999 | 1 | |
| CentrStage | CentrStage | 2000 | 1 | |
| Compagnia del Teatro Out Off | Compagnia del Teatro Out Off | 2000 – 2002 | 8 | |
| Cutty Sark Tall Ships’ Race | Cutty Sark Tall Ships’ Race | 2001 | 1 | |
| Compagnia Mario Chiocchio srl. | Compagnia Mario Chiocchio srl. | 2001 | 3 | |
| Chiaroscuro Productions | Chiaroscuro Productions | 2002 | 1 | |
| Chester Theatre Group | Chester Theatre Group | 2002 | 1 | |
| Compagnie La Nuit et le Moment Théâtre | Compagnie La Nuit et le Moment Théâtre | 2003 | 2 | |
| CSU Department of Theatre | CSU Department of Theatre | 2004 | 1 | |
| Company OnStage | Company OnStage | 2005 | 2 | 2 |
| CT2 TV | CT2 TV | 2005 | 1 | |
| Casa de Teatro de Sintra | Casa de Teatro de Sintra | 2006 – 2007 | 2 | |
| Centro di Ricerca per il Teatro | Centro di Ricerca per il Teatro | 2006 – 2007 | 3 | |
| Company of Ten | Company of Ten | 2006 – 2013 | 2 | 1 |
| Chemainus Theatre Festival | Chemainus Theatre Festival | 2007 | 1 | |
| Chronic'Théâtre | Chronic'Théâtre | 2007 | 1 | |
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