| Climate Change AI | Pennsylvania |
| Climate Club Holdings PBC | New York |
| Climate Innovation Capital, Inc. | |
| Climate, LLC | California |
| Climatize Earth, Inc. | |
| Climax Laboratories | California |
| ClimaxCode | |
| Climb Bio | |
| Climb Marketing, LLC | |
| Climb New Heights, LLC | |
| Climber.com | California |
| Clinartis, LLC | Florida |
| Clinc, Inc. | Michigan |
| Clinch | New York |
| Clinch Technology Ltd | |
| ClinChoice | Pennsylvania |
| ClinDatrix, Inc. | California |
| Cline Bot, Inc. | |
| Cline Communications Corporation | Washington |
| Clinect Healthcare, Inc. | North Carolina |
| Clinetic | North Carolina |
| Clinic Solutions, Inc. | Oregon |
| Clinical Investigation Specialists | Illinois |
| Clinical Research Philadelphia | Pennsylvania |
| Clinicient, Inc. | |
| ClinicMind | |
| CliniComp International | California |
| ClinicPro, Inc. | Michigan |
| Clinicworks | Oklahoma |
| Clinify Health | |
| Clinigence Health | |
| Clinilabs | |
| Clinilabs, Inc. | New Jersey |
| Cliniqa | |
| Clinisys, Inc. | |
| Clinitech Technologies USA | |
| CliniWorks, Inc. | Massachusetts |
| Clink Finders | Virginia |
| Clinkweb | |
| ClinLab, Inc. | Florida |
| ClinSmart, LLC | Pennsylvania |
| Clinton College | South Carolina |
| Clinton Electronics | Illinois |
| Clintrex | |
| ClioSoft, Inc. | California |
| Clip Automation | California |
| Clipbook | |
| ClipMate | New York |
| Clipper Ship Ventures, LLC | Connecticut |
| CLIPr Co. | Washington |