| Cystetic Medicines | California |
| CystoSure | Massachusetts |
| Cyta Therapeutics, Inc. | |
| Cytea Bio | |
| CyTech International | Colorado |
| Cytek | Oklahoma |
| Cytek Biosciences | California |
| Cytel | Massachusetts |
| Cytel, Inc. | |
| CytexOrtho | North Carolina |
| Cytimmune | Maryland |
| CytoAgents, Inc. | Pennsylvania |
| CytoAgents, Inc. | |
| CytoDel, Inc. | New York |
| Cytodiagnostics, Inc. | |
| CytoDyn, Inc. | Washington |
| Cytogel Pharma | |
| Cytokind, Inc. | |
| Cytokinetics | California |
| Cytologics, LLC | California |
| CytomX Therapeutics, Inc. | |
| Cytonics Corporation | Florida |
| Cytonus Therapeutics, Inc. | |
| CytoRecovery, Inc. | Virginia |
| Cytorum, Inc. | |
| Cytoscape | California |
| Cytosite Bio | |
| Cytoskeleton, Inc. | |
| CytoSorbents Corporation | New Jersey |
| Cytotheryx, Inc. | |
| CytoTronics | Massachusetts |
| Cytovale, Inc. | |
| Cytovance Biologics | Oklahoma |
| CytoVeris, Inc. | Connecticut |
| CytoViva, Inc. | |
| Cytracom | Texas |
| Cytranet | Alabama |
| Cytrellis Biosystems, Inc. | Massachusetts |
| Cytrio, Inc. | Massachusetts |
| Cyvatar.AI | California |
| Cyviation | New York |
| Cyvl, Inc. | |
| Cyware | New Jersey |
| Cyxtera Technologies, Inc. | Florida |
| CZ Technologies, LLC | Wisconsin |
| D & D Computer Consulting | Tennessee |
| D F Electronics, Inc. | Ohio |
| D Koder Marketing | |
| D Media | Texas |
| D X Technologies, LLC | |