| Cyberwoven | South Carolina |
| CyberX | Massachusetts |
| Cybexo, Inc. | |
| Cyble, Inc. | Georgia |
| Cyborg Mommy | Connecticut |
| Cyborg Security Security, Inc. | |
| CYBRA Corporation | New York |
| Cybrary, Inc. | Maryland |
| Cybrid, Inc. | New Jersey |
| Cybrtch | |
| CyByte | Texas |
| Cyclarity Therapeutics, Inc. | |
| Cycle Labs | North Carolina |
| CycleNet, Inc. | Virginia |
| Cyclerion Therapeutics, Inc. | |
| Cyclo Therapeutics, LLC | |
| Cyclone Interactive Multimedia Group, Inc. | Massachusetts |
| Cyclone Microsystems | Connecticut |
| Cyclone Web Design | New Jersey |
| Cyclos-Semiconductor, Inc. | California |
| CyCloud Technology, LLC | Wyoming |
| CyCognito | California |
| Cycorp | Texas |
| Cycosoft, LLC | Arizona |
| Cycrest | Washington |
| Cycuity, Inc. | |
| Cycurion, Inc. | Virginia |
| CydoMedia | |
| CYduct Diagnostics, Inc. | Connecticut |
| Cyera | |
| Cyera US, Inc. | New York |
| Cyfe, Inc. | Washington |
| Cyfeon Solutions | Texas |
| Cyferd | |
| Cyfrania | |
| Cyfrow Solutions | |
| Cygnis | |
| Cygnis Media | California |
| Cygnus IT Solutions | |
| Cygnus Systems, Inc. | Michigan |
| Cygnus Technologies, LLC | North Carolina |
| Cygnusoft | California |
| CYGNVS | California |
| Cygwin | North Carolina |
| Cykic Sites | California |
| Cylinder Health | |
| Cylogy, Inc. | California |
| CYMA | Arizona |
| Cymantix | North Carolina |
| Cymath | |