Politics and Business magazines
- Cameco Corporation
- Camelot Music, Inc.
- Cameron & Barkley Company
- Campbell Scientific, Inc.
- Campbell-Ewald Advertising
- Campbell-Mithun-Esty, Inc.
- Campeau Corporation
- Campo Electronics, Appliances & Computers, Inc.
- Campofrío Alimentación S.A
- Canada Packers Inc.
- Canadair, Inc.
- Canadian National Railway Company
- Canadian National Railway System
- Canadian Pacific Limited
- Canadian Pacific Railway Limited
- Canadian Tire Corporation, Limited
- Canandaigua Brands, Inc.
- Canandaigua Wine Company, Inc.
- Canary Wharf Group Plc
- Candela Corporation