| The Chariot Group | Alaska |
| The Charles Group | |
| The Chatfield Group, Inc. | Arizona |
| The Chicago School | Illinois |
| The Chronicle of Higher Education | |
| The Chrono-Tek Company, Inc. | North Carolina |
| The Citadel Department of Mathematical Sciences | South Carolina |
| The Clay Media | |
| The Clever Robot, Inc. | |
| The Click Depot | North Carolina |
| The Climate Corporation | California |
| The Climate Pledge | |
| The Clinical Trial Center, LLC | Pennsylvania |
| The Clone Store Forensic Lab | Pennsylvania |
| The Cloud Mail Store, Inc. | |
| The Coder Digital Agency | |
| The Coding Network, LLC | California |
| The College of New Jersey Computer Science | New Jersey |
| The College of New Jersey Mathematics and Statistics | New Jersey |
| The College Solution | |
| The Comdyn Group | North Carolina |
| The Common Desk, Inc. | |
| The Commons on Champa | Colorado |
| The Commonwealth Creative | |
| The Communication Studio, LLC | New Jersey |
| The Company Lab | Tennessee |
| The Complete Exam | Virginia |
| The Computer Barn | Pennsylvania |
| The Computer Center | Texas |
| The Computer Company, Inc. | Connecticut |
| The Computer Connectors, LLC | South Dakota |
| The Computer Department, Inc. | Illinois |
| The Computer Doctors | Wisconsin |
| The Computer Guy | Missouri |
| The Computer Guy & Company | North Carolina |
| The Computer Hospital | Texas |
| The Computer Hospital, LLC | Wisconsin |
| The Computer Man | New York |
| The Computer Place | North Dakota |
| The Computer Place, Inc. | Maine |
| The Computer Store | North Dakota |
| The Computer Supply People | Wisconsin |
| The Computer Support Group, Inc. | Missouri |
| The Computer Wizard | Washington |
| The Computer Works of Arkansas, Inc. | Arkansas |
| The Computer Workshop, Inc. | Ohio |
| The Conference Exchange | Rhode Island |
| The Confidant Collective | |
| The Connector People | Pennsylvania |
| The Connor-Winfield Corporation | Illinois |