Politics and Business magazines
- Cleveland Indians Baseball Company, Inc.
- Click Wine Group
- Clif Bar Inc.
- Clifford Chance LLP
- Clinton Cards plc
- Cloetta Fazer AB
- Close Brothers Group plc
- Clougherty Packing Company
- Club Méditerran
- Club Mediterranée S.A.
- ClubCorp, Inc.
- CMG Worldwide, Inc.
- CMGI, Inc.
- CML Group, Inc.
- CMP Media Inc.
- CNET Networks, Inc
- CNH Global N.V.
- CNS, Inc.
- Co-operative Group (CWS) Ltd.
- Coach Leatherware