| CopeCart GmbH | |
| Coperion GmbH | |
| Coqui | |
| COR communication | |
| CORAT Therapeutics GmbH | |
| Corbado GmbH | |
| Cordaware GmbH | Bavaria |
| Corden Pharma International GmbH | |
| Core Networks GmbH | Hesse |
| Core SE | Berlin |
| Core Sensing GmbH | |
| Coregenion GmbH | |
| CoreMedia GmbH | Hamburg |
| CoreMedic GmbH | |
| CoreNet GmbH | |
| Coreo AG | |
| Coress GmbH | Berlin |
| coreweb – Gesellschaft für consumer relevant web solutions mbH | |
| Coriolis Pharma Research GmbH | |
| Corpex Internet GmbH | Hamburg |
| Corporate Communication Networks GmbH | Bavaria |
| Corscience GmbH & Co. KG | |
| Cortago AG | Berlin |
| CorTec GmbH | |
| Corussoft GmbH | |
| COS Computer GmbH | |
| COS Geoinformatik & Systemhaus | Baden-Württemberg |
| COSA Software | Lower Saxony |
| COSALUX GmbH | |
| COSCOM Computer GmbH | Bavaria |
| Cosee GmbH | |
| COSEW Computer Netzwerke Elektronik | Saxony-Anhalt |
| CosH Consulting GmbH | Bavaria |
| Cosifan Computersysteme GmbH | Saxony |
| Cosmetri GmbH | Berlin |
| Cosmigo GmbH | Saxony |
| Cosmo Consult AG | Berlin |
| CosmoCode GmbH | Berlin |
| Cosmolog GbR | Hesse |
| Cosmos Consulting Group IT Services GmbH | |
| Cosmos GbR | Thuringia |
| Cosmoshop | Bavaria |
| CosmosMedia | |
| cosmoworx IT-services | Hesse |
| CosmWasm | |
| Cosoba GmbH | Hesse |
| Cosoft Computer Consulting GmbH | North Rhine-Westphalia |
| Cosuno Ventures GmbH | Berlin |
| Cotronic GmbH | Schleswig-Holstein |
| Counter | |