| Index | C0 | CA | CB | CC | CD | CE | CF | CG | CH | CI | CJ | CK | CL | CM | CN | CO | CP | CQ | CR | CS | CT | CU | CV | CW | CX | CY | CZ | Home |
| Company | Country | Branch |
| Caatoosee | Germany | Internet |
| Camelot | Germany | Telecommunication |
| Cancom | Germany | IT Service |
| Capital Stage (früher: HWAG) | Germany | Finance |
| Cargolifter | Germany | Aircraft |
| Carl Schenck AG | Germany | Engineering |
| Carl Zeiss Meditec (früher: Asclepion-Meditec) | Germany | Medicine |
| Carthago Biotech | Germany | Holdings |
| cash.medien | Germany | Media |
| CCR Logistics Systems | Germany | Logistics |
| CDV | Germany | Software |
| ce Consumer Electronic | Germany | Trade |
| CEAG | Germany | Electronics |
| Celanese | Germany | Chemicals |
| Cenit | Germany | IT Service |
| Centrotec | Germany | Others |
| Ceotronics | Germany | Electronics |
| CeWe Color Holding | Germany | Consumer Goods |
| Ceyoniq (früher: CE Computer Equipment) | Germany | Software |
| Christian Adalbert Kupferberg & Compagnie | Germany | Beverages |
| CinemaxX | Germany | Media |
| CineMedia Film | Germany | Media |
| Cloppenburg Automobil | Germany | Car Industry |
| Co.don | Germany | Biotechnology |
| Comdirect Bank | Germany | Finance |
| Commerzbank | Germany | Bank |
| CompuGROUP Holding | Germany | Computer |
| Computec Media | Germany | Media |
| Computerlinks | Germany | IT Service |
| Comroad | Germany | Computer |
| Comtelco | Germany | Software |
| Comtrade | Germany | IT Service |
| Concept! | Germany | Internet |
| Concord Effekten | Germany | Finance |
| Concordia Bau und Boden | Germany | Real Estate |
| Condat | Germany | Software |
| Condomi | Germany | Trade |
| Consors | Germany | Finance |
| Constantin Film | Germany | Media |
| Continental | Germany | Car Suppliers |
| COR | Germany | Software |
| CPU Software | Germany | Software |
| Creaton VZ | Germany | Construction Materials |
| Cross IT.Media | Germany | Media |
| CS-Interglas | Germany | |
| CTS Eventim | Germany | Media |
| Curanum Bonifatius | Germany | Medicine |
| Curasan | Germany | Medicine |
| Curtis 1000 Europe | Germany | Paper |
| CyBio | Germany | Biotechnology |
| Cycos | Germany | Software |
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