Politics and Business magazines
- Cutera, Inc.
- Cutter & Buck Inc.
- CVS Corporation
- Cybermedia, Inc.
- Cyberonics, Inc.
- Cybex International, Inc.
- Cygne Designs, Inc.
- Cygnus Business Media, Inc.
- Cymer, Inc.
- Cyprus Airways Public Limited
- Cyprus Amax Minerals Company
- Cyprus Minerals Company
- Cyrk Inc.
- Cytec Industries Inc.
- Cytyc Corporation
- Czarnikow-Rionda Company, Inc.
- D&K Wholesale Drug, Inc.
- D-Link Corporation
- D.F. Stauffer Biscuit Company
- D.G. Yuengling & Son, Inc.