| Cloudvirga | California |
| Cloudwall Capital, Inc. | New York |
| CloudWave | Massachusetts |
| Cloudwords, Inc. | California |
| CloudX | Connecticut |
| CloudX | |
| CloudxLab, Inc. | Oregon |
| Cloudy Mountain Computers | |
| CloudZero, Inc. | Massachusetts |
| CloudZone, Inc. | |
| Cloud[8]Sixteen, Inc. | |
| Clouxi Plexi, LLC | |
| Clover Biosciences, LLC | Texas |
| Clover Creek Digital, LLC | California |
| Clover Network, Inc. | California |
| Clover Park Technical College | Washington |
| Clover Security | |
| Clover Sites, Inc. | California |
| Cloverapp | Illinois |
| CloverDX, Inc. | Virginia |
| Cloverleaf Analytics | Texas |
| CLOVERNA, Inc. | |
| Cloward Design | |
| ClowdCover, LLC | |
| Clowder | Virginia |
| Clozd, Inc. | |
| Cloze, Inc. | Massachusetts |
| Clozex Medical, Inc. | Massachusetts |
| CLS Therapeutics | |
| Club Apps | |
| Club Automation | Illinois |
| Club Data Corporation | Minnesota |
| Clubessential, LLC | Ohio |
| ClubOS | |
| ClubReady | Missouri |
| ClubVPS | New York |
| Cluely | |
| Clueso | |
| ClueTrust | Virginia |
| Clumio, Inc. | California |
| Cluster Labs | California |
| Clustify | Pennsylvania |
| Clustox | |
| Clutch | |
| Clutch Creative Company, Inc. | |
| Clutch Digital Development | |
| Clutch Holdings, LLC | |
| ClutchClick, LLC | |
| Clutter, Inc. | |
| CLVR | Colorado |