C
- Costa Verlag, S.L.
- Costco Connection
- Cote Maisons SAS
- Cote Nord
- Cotidianul
- Country House Magazine
- CountryWide Media
- Courrier de Portneuf
- Courrier International
- Couto Group
- Cover Story Publications
- Cox First Media (USA)
- CPMM Ltd
- CPPRESSE
- CPS Live/The Fumba Times
- Creamer Media Pty Ltd
- Creatif concept edition
- CreationVLC
- Creative 3 Publishing
- Creative Programs (Philippines)
- Creative Wheel
- Creature Media Ltd.
- Credit Suisse AG
- Cricket Media
- Crown
- Crown Publishing
- Crowne Plaza Bahrain
- CRUISES NEWS MEDIA GROUP S.L.
- Cruising Journal
- CSF Multimedia LLC
- CTSA LLC
- Cult Mtl Media Inc.
- Cultureshock Media
- Cursus Media Verlags GmbH
- Cwmni Cara Cyf
- Cyber Press Publishing
- Cyfryngau Cymru Cyf
- Cynaco Ltd
- CYRUS LIGHTS