| Colossyan, Inc. | |
| Colostore.com, LLC | Indiana |
| Colotraq | New Jersey |
| Colourlab Ai | California |
| COLSA Corporation | Alabama |
| Coltecom Enterprises Corporation | Arizona |
| Colter Bay Computers | Wyoming |
| ColtTech, LLC | Kansas |
| Columbia Basin College | Washington |
| Columbia Basin Netwerks, Inc. | Washington |
| Columbia Capital Corporation | Virginia |
| Columbia Central University | Puerto Rico |
| Columbia College Applied Mathematics | South Carolina |
| Columbia College Bachelor's in Computer Science | Missouri |
| Columbia College Bachelor's in Cybersecurity | Missouri |
| Columbia College Bachelor's in Mathematics | Missouri |
| Columbia College Chicago | Illinois |
| Columbia College Computer & Information Science | South Carolina |
| Columbia Electronics International, Inc. | California |
| Columbia Green Technologies | |
| Columbia International University | South Carolina |
| Columbia SEO Company | |
| Columbia Technology Ventures | New York |
| Columbia University Biomedical Engineering | New York |
| Columbia University Columbia Quantum Initiative | New York |
| Columbia University Department of Computer Science | New York |
| Columbia University Department of Electrical Engineering | New York |
| Columbia University Department of Mathematics | New York |
| Columbia University Zuckerman Institute | New York |
| Columbia Ventures Corporation | |
| Columbia-Area Linux Users Group | Maryland |
| Columbia/Okura, LLC | Washington |
| Columbus Computer | Indiana |
| Columbus Data Services | Texas |
| Columbus Micro | Ohio |
| Columbus Projector | Ohio |
| Columbus State University | Georgia |
| Columbus State University School of Computer Science | Ohio |
| Columbus Technical College | Georgia |
| Columbus Technology Solutions | Ohio |
| Columbus Web Design | Indiana |
| Columbus Website Design | |
| Column Five | |
| Column5 Consulting Group, LLC | Arizona |
| Columns Ai, Inc. | Washington |
| Colure Media | |
| COM Web Site Design | Wisconsin |
| Com1 Software, Inc. | Ohio |
| Com2uS Group | California |
| Comair Rotron | Texas |