- Compark AG
- Compass Group (Schweiz) AG
- Compendio Bildungsmedien AG
- compenswiss (Fonds de compensation AVS/AI/APG)
- Competec
- Competec Service AG
- Competence Call Center GmbH (AT)
- Competence Call Center GmbH a Telus International group company
- Complemedis AG
- COMPO Jardin AG
- Compona AG
- Compounds AG
- Comptoir Immobilier SA
- ComputerWorks AG
- ComRo Rohner AG
- comtexto AG
- Comundo
- Conaxess Trade Switzerland AG
- Concept Emploi SA
- Concilium Search
- Concircle Schweiz AG
- Concluso
- Concordia
- Condair Group AG
- Condecta AG
- Condesys Consulting GmbH
- CONDIS Group | CONDIS SA et ELVEXYS SA
- CONDIS SA
- Conduent Business Solutions AG
- Conextivity Group
- Conextivity Group SA
- Confectronic SA
- Conférence intercantonale de l'instruction publique - CIIP
- CONFIDA Holding AG
- Confidentiel
- Confinale AG
- Confirm AG
- Confiserie Bachmann
- Confiserie Bauer
- Confiserie Honold AG
- Confiserie Spruengli
- Confiserie Tea Room Brändli AG
- Conforama Suisse SA
- Congrex Schweiz AG
- Conica AG
- Connect Com AG
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