- Ceva
- Choiceflowers
- California Umbrella
- Comfort Design Mats
- Caroline Z Hurley
- Cali Fabrics
- Cat Camp
- Cole's Wild Bird
- Canine Caviar
- CatCurio
- Creative Gifts International
- Chai Chun
- Creamiicandy
- Creamette
- Cold Picnic
- Coco-Mat
- Crane Cookware
- Chicago Painters
- CB's Nuts
- Cerence
- Continental Automotive
- Consider the Wldflwrs
- Coco Jolie Fine Chocolates
- Crunchsters
- Crosswater
- Cybele's
- Columbia Safety and Supply
- Chloe Lighting
- City Lights USA
- Color Kinetics
- Collections
- Cedric Dupont Antiques
- Cladding Store
- Continental
- Clauss
- CHUNGHWA
- Couristan
- Children's Factory
- Caraluzzi's
- C&K Market
- Camellia Brand
- Cake2Homes
- Cat Amazing
- Casual Home
- Caravan
- CozyModernDecor
- Canvasx
- Candle Soylutions
- Clean & Fresh
- Chicago Air Services
- Clean Carpets
- Clean Sleep
- Cookie Baby Inc
- Concord's Best Dressed Kids
- Cocoa Crayon
- Comfy Baby
- Choomee
- CarGo seat
- Cozy Covers
- Cheeky Chums
- Crocheted Baby Afghans
- Character World
- Calidou
- Cretoy
- Clear Preservations
- Cheski Sock Company
- Cleveland Faucet Group
- Cusa Tea & Coffee
- Cafflano®
- Caffe Monte
- Cycleccino
- Calusa Coffee Roasters
- CUPS Prepaid Coffee
- Crown Beverages
- Canton Tea
- Cat Café Madison
- ChaiTea
- Coates Produce
- Chew Coffee Dip
- CuddleBee