Marken in Mainz
- C & A Mode (1)
- Cafe Extrablatt (2)
- Calzedonia (1)
- Cargill (1)
- CARGLASS (1)
- Caritas (12)
- CECIL (1)
- CGM SYSTEMHAUS GmbH (1)
- CHRIST Juweliere (2)
- CineStar (1)
- CJD Christliches Jugenddorfwerk Deutschlands (2)
- Clever Fit Fitnessstudio (1)
- CLINIC IM CENTRUM (1)
- Clinique (2)
- Coffee-Fellows (1)
- Colloseum Mode (1)
- Com Training (1)
- COMCAVE.COLLEGE (1)
- comma Store (1)
- COMMERZBANK (1)
- compustore (1)
- concess M+A Partner (1)
- Conrad Electronic (1)
- Continentale Versicherungsverbund (1)
- Contipark (4)