- Canadian Filmmakers Festival
- Canadian Marketing Association
- Canadian Parks and Wilderness Society
- Canadian Red Cross
- Canadian Sea Turtle Network
- Canadian Tire
- Canadian Tourism Commission
- Canadian Tourism Federation
- Canal +
- Canal+
- Canalsat
- Cancer Aid & Research Foundation
- Cancer Association of North Rhine Westphalia
- Cancer Research UK
- Cancer Society of Finland
- Canderel
- Canderel Natural Sweetener
- Canele Patisserie Chocolaterie
- Canesten
- Cannon Optical Image Stablizer
- Canon
- Canon Eos
- Canon Image Stabilier
- Canon Steady Shot
- canstop.org
- Capcom
- Cape Argus
- Cape Times
- Cape Union Mart
- Capital
- Capital advertising
- Capital Magazine
- Capitec
- Capitulo VII
- Caplansky's Delicatessen
- Capri
- Captain Morgan Rum
- Caracol Radio
- Carb Bloc dietary supplement
- Career Builder
- Career Junction
- Career Launcher
- Cargoitalia
- Carib Beer
- Caribou Coffee
- Caricature and Cartoon museum
- Carino
- Caritas
- Carling
- Carling Black Label
- Carlsberg
- Carlton Draught
- Carlton Dry
- Carlton Natural Blonde
- Carpark
- carpetestes.org
- Carphone Warehouse
- Carre De Chocolat Chocolate Box
- Carrefour
- Cartoon Network
- Casall Sports Products
- CasaShopping
- Case Construction Leasing
- Cashmere Bathroom Tissue
- Casio Exilim
- Cassie Awards
- Castrol
- Castrol GTX
- Castrol Magnatec
- Catalonian National Theatre
- Caterer.com
- Cathay Pacific Rugby Sevens
- Catholic Memorial High School
- Catholic Star Wars
- Catsan Crystals
- Catwalk
- Cavalieri Clothing
- CBC Television
- CBC Television, The Ron James Show
- CCCP restaurant
- CCT Advertising
- CCTV (Central China Television)
- Cedar Creek Tradesmen
- Cedar Liquid Wax
- Cedra
- CellC
- Cello Pens
- Centea
- Centraal Beheer
- Centraal Beheer Achmea
- Centraal Beheer Insurances
- Central Pollution Control Board
- Centurply
- Cerveira Art Biennial
- Cerveza Norte
- Ceserani Disinfestation
- Ceys adhesive tape
- CGSS/ANPAA
- Chambers Hotel
- CHANEL N°5
- Change Lingerie
- Change the World 9-5
- Channel 4
- Channel 6
- Channel Five
