| Copotential | California |
| Copp Media | |
| Copper | |
| Copper Digital | Texas |
| Copper Electronics, Inc. | California |
| Copper Labs | Colorado |
| Copper Media | Texas |
| Copper Mountain College | California |
| Copper Project | Texas |
| Copper Valley Telecom | Alaska |
| Copper Wire Ventures, LLC | New York |
| Copper.net, Inc. | Ohio |
| Coppin State University | Maryland |
| Coppola Enterprises, Inc. | Pennsylvania |
| CoPromote, LLC | |
| Copy & Design | California |
| Copy Cat Copier Services, Inc. | Florida |
| Copy Systems, Inc. | Iowa |
| CopyAI, Inc. | |
| Copylady, Inc. | Florida |
| Copyleaks Technologies Ltd | Connecticut |
| Copyright Clearance Center, Inc. | |
| Copysmith Artificial Intelligence, Inc. | Alabama |
| Cora Intelligence Technologies, Inc. | |
| Coralogix Ltd | Massachusetts |
| Coranet | New York |
| Coras, Inc. | Virginia |
| Corban University | Oregon |
| Corbital Technologies, LLC | |
| Corbus Pharmaceuticals Holdings, Inc. | |
| Corcial | |
| Cord Hosting, Inc. | California |
| Cord Sets, Inc. | Minnesota |
| Cord Specialties Co. | Illinois |
| Cordance Medical | California |
| Cordero + Davenport | |
| Cordex Biologics, Inc. | |
| Cordial Experiences, Inc. | California |
| Cordiance, LLC | California |
| Cordis | Florida |
| Cordis | |
| CordlessMedia, LLC | Arizona |
| CordlessMedia, LLC | |
| Córdova Fisher Design | |
| Cordova Telephone Cooperative, Inc. | Alaska |
| CorDx | |
| Core BTS | Indiana |
| Core Business Solutions, Inc. | Pennsylvania |
| Core Capital Partners | District of Columbia |
| Core Clinical Services | |