By customer
- Caltex Australia
- Camar S.p.A.
- Cameron
- Casa Oliveira
- Chandra Asri
- China Ocean Shipping (Group) Company - COSCO
- CIBER Managed Services GmbH
- City of Burnaby
- City of Dresden IT and Organization Services
- City of Plzen
- Cnam - Conservatoire National des Arts et Métiers
- Coca-Cola Bottling Co. Consolidated (CCBCC)
- Coca-Cola Bottling Co. Consolidated
- COFCO China Foods Ltd
- Colacem S.p.A.
- Colgate-Palmolive
- Companhia Hidro-Eletrica do Sao Francisco (CHESF)
- ConAgra Foods
- Constantia Hueck Folien GmbH & Co. KG
- Continental Automotive
- ConvaTec
- Coop Consorzio Nord Ovest (CCNO)
- Co-Operative Bulk Handling
- Corporate Express Australia Limited
- COSVI (Cooperativa de Seguros de Vida)
- COSVI (Video)
- CRH Europe Distribution
- Cyprus Ministry of Health
- Cyprus Telecommunications Authority