| Cartloop | California |
| Carto | |
| CartoDB, Inc. | New York |
| Cartografx Corporation | Connecticut |
| Cartogram | Washington |
| Cartography Biosciences, Inc. | California |
| Cartouche WebWorks, Inc. | Illinois |
| Cartridge Connection | Alaska |
| Cartridge Technologies | Arizona |
| Cartridge World | California |
| CartridgeSupplier.com | New Jersey |
| CartridgeWebsite.com | Indiana |
| Cartwheel Web | California |
| Cartwheel, Inc. | |
| Carver Biosciences, Inc. | Massachusetts |
| Carver College | Georgia |
| Carvin Software | Arizona |
| Carybit, LLC | Wyoming |
| Caryl Communications, Inc. | |
| Casa Systems | Massachusetts |
| Casa Verde Capital, LLC | California |
| Casa, Inc. | Colorado |
| CASAHL Technology, Inc. | California |
| Casana | New York |
| Casanova Ventures, Inc. | Colorado |
| Casap Technologies, Inc. | |
| Cascade Asset Management, LLC | Wisconsin |
| Cascade Computer Maintenance, Inc. | Oregon |
| Cascade Digital Marketing | |
| Cascade Financial Technology Corporation | Nevada |
| Cascade Group, Inc. | New York |
| Cascade Prodrug, Inc. | Oregon |
| Cascade Seed Fund | |
| Cascade Web Development | Oregon |
| Cascade Web Works | Oregon |
| Cascadia Capital, LLC | Georgia |
| Cascadia College | Washington |
| Cascadia Drug Development Group, LLC | Washington |
| Cascadian Software, LLC | |
| Casdin Capital | New York |
| Case Closed Software | |
| Case Consulting, Inc. | Virginia |
| CASE Software & Books | North Carolina |
| Case Technologies, Inc. | Pennsylvania |
| Case Western Reserve University Department of Mathematics, Applied Mathematics, and Statistics | Ohio |
| Case Western Reserve University Electrical, Computer and Systems Engineering | Ohio |
| CaseBioscience, LLC | |
| Casebook | |
| CaseCamp | Texas |
| Casecheck | Illinois |