Politics and Business magazines
- Citicorp Diners Club, Inc.
- Citizens Communications Company
- Citizens Utilities Company
- Citrix Systems, Inc.
- City Brewing Company LLC
- City Developments Limited
- City Public Service
- CJ Corporation
- Claire’s Stores, Inc.
- Clare Rose Inc.
- Clarion Company Ltd.
- Clark Equipment Company
- Classic Vacation Group, Inc.
- Clayton Williams Energy, Inc.
- Clean Harbors, Inc.
- Clear Channel Communications, Inc.
- Clearly Canadian Beverage Corporation
- Clearwire, Inc.
- Cleary, Gottlieb, Steen & Hamilton
- Cleco Corporation