| Commonwealth Savings/Trading Bank of Australia, The | The Commonwealth Savings/Trading Bank of Australia | 1976 | 1 | |
| Compagnia Teresa Mariani | Compagnia Teresa Mariani | 1910 | 1 | |
| Cardinal Stritch University | Cardinal Stritch University | 1997 | 1 | |
| Compagnia Vittorina Duse-Treves | Compagnia Vittorina Duse-Treves | 1897 | 1 | |
| Compagnia Drammatica dell'ETI | Compagnia Drammatica dell'ETI | 1943 | 1 | |
| CSU Department of Theatre | CSU Department of Theatre | 2004 | 1 | |
| Compagnia Buccellati | Compagnia Buccellati | 1893 | 1 | |
| Chosun Actors School | Chosun Actors School | 1925 | 1 | |
| Compagnia Piamonti-Baccani | Compagnia Piamonti-Baccani | 1896 | 1 | |
| Campbell Young Associates | Campbell Young Associates | 2024 | 1 | |
| Cía. Dramática Italiana Teresa Mariani | Cía. Dramática Italiana Teresa Mariani | 1904 | 1 | |
| Compañía Valderrabanos, Witemberg y Romo, La | La Compañía Valderrabanos, Witemberg y Romo | 2010 | 1 | |
| Cercle des Echoliers | Cercle des Echoliers | 1892 | 1 | |
| Compagnia De Farro | Compagnia De Farro | 1895 | 1 | |
| Collectif Io | Collectif Io | 2023 | 1 | |
| Comédie de Rennes, La | La Comédie de Rennes | 1982 | 1 | |
| Compagnia Franza | Compagnia Franza | 1903 | 1 | |
| Compagnia Occasionale | Compagnia Occasionale | 1949 | 1 | |
| Compagnia Spazio Zero | Compagnia Spazio Zero | 1999 | 1 | |
| Compagnia sociale di Renzi | Compagnia sociale di Renzi | 1894 | 1 | |
| Compagnia Maggi-Della Guardia | Compagnia Maggi-Della Guardia | 1899 | 1 | |
| California State University, Chico's Department of Theatre | California State University, Chico's Department of Theatre | 2011 | 1 | |
| Compagnia Drammatica diretta da A. Fabbri | Compagnia Drammatica diretta da A. Fabbri | 1911 | 1 | |
| Comédie de Lyon | Comédie de Lyon | 1980 | 1 | |
| Canberra Theatre Trust | Canberra Theatre Trust | 1970 | 1 | |
| Cutty Sark Tall Ships’ Race | Cutty Sark Tall Ships’ Race | 2001 | 1 | |
| Compañía de Palencia-Tubau | Compañía de Palencia-Tubau | 1903 | 1 | |
| Chester Theatre Group | Chester Theatre Group | 2002 | 1 | |
| Criterion Independent Theatre | Criterion Independent Theatre | 1897 | 1 | |
| Compagnia Ferrati-Morelli-Stival-Carraro | Compagnia Ferrati-Morelli-Stival-Carraro | 1943 | 1 | |
| Chiswick Drama Circle | Chiswick Drama Circle | 1956 | 1 | |
| Chiaroscuro Productions | Chiaroscuro Productions | 2002 | 1 | |
| Coro del Maggio Musicale Fiorentino | Coro del Maggio Musicale Fiorentino (Maggio Chorus) | 2024 | 1 | |
| Creative Arts Center | Creative Arts Center | 1975 | 1 | |
| Compagnia Gray-Sequi | Compagnia Gray-Sequi | 1905 | 1 | |
| Chemainus Theatre Festival | Chemainus Theatre Festival | 2007 | 1 | |
| Compagnia Fantechi | Compagnia Fantechi | 1895 | 1 | |
| Company Leptourgeion | Company Leptourgeion | 2023 | 1 | |
| Century Players, The | The Century Players | 1904 | 1 | |
| Conservatorio Giovanni Pierluigi da Palestrina | Conservatorio Giovanni Pierluigi da Palestrina | 2013 | 1 | |
| CT2 TV | CT2 TV | 2005 | 1 | |
| Cía. Cómico Dramática Mercedes Navarro y Julio Taboada | Cía. Cómico Dramática Mercedes Navarro y Julio Taboada | 1916 | 1 | |
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