- Coastguard
- Coates Hire
- Cobra Car Alarms
- Coca Cola
- Coca-Cola
- Coca-Cola light
- Coca-Cola Zero
- Cocco's Cafe
- Cochlear
- Cockfights
- Coco De Mer
- Codatronca
- CoffeeCompany
- COI
- Coke Zero
- Cold-Eeze
- Coldwell Banker
- Colegio Unico
- Colgate
- Colgate Max Fresh
- Colin McRae Dirt 2
- ColoCall
- Colombian Association of Arterial Hypertension
- Colorbrite
- Colorectal Cancer Awareness
- Colour Double Header Pens
- Colpatria
- Columbia
- Columbia Sportswear
- Combiflam
- Comcast
- Comcast High-Speed Internet
- Comedy Central
- Comedy Frederation
- Comex Paints
- Comfort
- Comfort fabric softener
- Comision Especial de Discapacidad
- Comité Régional du Tourisme Paris Ile-de-France
- Commercial Trader
- Commodore
- Comodo.it
- Compamnia Athletica
- Companhia Athletica
- Compare The Market
- Complot Creativity School
- Compulsory Auto Insurance of Puerto Rico
- ComputerTan
- CompuTrade Networks
- Comtel/Just Prepaid Mobile
- Comune di Nettuno
- Condemned 2
- Condom packet
- Condom Shop
- Condomi
- Condooms.com
- Confiserie Seidl
- Conforama
- Connecticut Tax Amnesty
- Connex
- Constantia Insurance
- Conto Barriers
- Control Condoms
- Converse
- CoolCat DanceBattle
- Cooperativa AgrÃcola de Itu
- Coopers Beer
- COP15
- Copywriter
- Coral Anti Mold Paint
- Corazon Tequila
- Corbis Motion
- Corbis Rights Services
- Cornetto
- Corona beer
- Corporate Chhattisgarh
- Corrado Mattresses
- Coryfin-C
- Cosmo Recruitment
- Cosmofon
- Cosmote
- Cosmote Chorus
- cotidianul.ro
- Cottons
- Courage India
- Covergirl teens
- Cox & Kings
- Cox Communications
- CPAA
- CPH Vision
- Craftsman
- CRAMI
- Cravendale
- CreAds
- Create Not Hate
- Creature Comforts USA
- Crime Channel
- Crisis
- Cross Media
- Crumpler
- Crunch Fitness
- Cruz Roja Argentina (Red Cross)
- CSI Miami
- CSX
- CTBC
