C
- Caran d'Ache, supplier of pencils, pens and other office supplies as well as art supplies
- Charriol, jewellery & watch manufacture
- Chemins de fer du Jura
- Ciba-Geigy, the merger with Sandoz in 1996 created Novartis
- Ciba Specialty Chemicals
- CityNightLine, is a Night Train company servicing Austria, Denmark, Germany, the Netherlands and Switzerland
- Clariant
- CLS Communication
- Club Airways International
- Création Baumann
- Crypto AG
- Colayer
- Collanos
- Comlux
- Compagnie Générale de Navigation sur le lac Léman
- Coop, supermarket chain
- Credit Suisse
- Crossair, now Swiss International Air Lines
Read more about this topic: List Of Companies Of Switzerland