| Caerbladon CIC |
| Cafe Libertad Kollektiv eG |
| Cafédirect plc |
| Cafedirect Producers Limited |
| Cafeology |
| Caffe Nero Group Ltd |
| Cairblan Limited (trading as Crumpled Dog Design) |
| CaixaBank |
| CaixaBank Asset Management |
| Califia Farms LLC |
| Calon Wen Dairy Produce |
| Calon Wen Organic Milk Co-operative Limited |
| Calyx Drinks Ltd |
| Camara Education |
| Cambridge Assessment |
| Cambridge Education |
| Cambridge Partnership for Education |
| Cambridge Professional Development |
| Cambridge University Press |
| Camelia Investment 1 Limited |
| Cameroon English Language and Literature Teachers Association (CAMELTA) |
| Canadian International School |
| Canadian Solar |
| Candoco Dance Company |
| CANVA PTY LTD |