C
- C.K
- CableQuick
- Calex
- Canary
- Capital Valley Plastics Ltd
- Carhartt
- Carlisle Brass
- CarPlan
- Carroll and Meynell
- Carron Phoenix
- Cascade
- Cassellie
- CAT
- CED
- Centek
- Centurion
- Chacon
- Champion
- Cherry Blossom
- Chint
- Chocbox
- Cisa
- City Knights
- CK Magma
- Claber
- ClassicBond
- Clearwater
- Coast
- Coba Europe
- Cobra
- Codelocks
- Collingwood
- Colorfill
- Colours
- Colron
- Command
- Conex Banninger B Press
- Cooke and Lewis
- Cookerflex
- Corefix
- Corrapol
- Corrapol-BT
- Cozify
- Crabtree
- Creda
- Critterkill
- Cromar
- Croydex
- Crystal
- Cuprinol
- Curtis Dyna-Fog
- Cutter
- Cygnet