| Zentail, Inc. | Maryland |
| Zentalis Pharmaceuticals | |
| Zentech Manufacturing, Inc. | Maryland |
| Zentech, Inc. | Texas |
| Zentera Systems, Inc. | California |
| Zentist | California |
| ZenTrades | New York |
| Zentro | Illinois |
| Zenus | Texas |
| Zenware | Idaho |
| Zenysis Technologies | |
| Zeo Scientifix | |
| Zeo Technologies, Inc. | |
| Zeomega | Texas |
| Zeon Specialty Materials, Inc. | California |
| Zeon Systems | |
| ZeonHost, Inc. | Colorado |
| ZeOrbit | California |
| Zepheira, LLC | Virginia |
| Zephyr AI | Virginia |
| Zephyr AI | |
| Zephyr Project | |
| Zephyr Software | Texas |
| Zephyr Software, LLC | Virginia |
| ZephyrTec, Inc. | California |
| Zephyrtronics | California |
| Zephyrus Electronics Ltd | Oklahoma |
| Zeplin | |
| Zeplyn | New York |
| Zepps Home Computer Repair | Illinois |
| Zepteon, Inc. | Massachusetts |
| Zepto Life Technology, Inc. | Minnesota |
| ZEPTOLink | California |
| ZeptoMetrix, LLC | New York |
| Zequel | Florida |
| Zer0 to 5ive | |
| ZeraWare | New York |
| Zerigo Health | California |
| Zerion Software, Inc. | Virginia |
| Zerion, Inc. | California |
| Zero 8 Studios, Inc. | Nevada |
| Zero Access, Inc. | Illinois |
| Zero ASIC | |
| Zero Day Initiative | |
| Zero Defects International, LLC | California |
| Zero Friction Marketing | |
| Zero Gravity Marketing | |
| Zero Gravity Web Design | |
| Zero Hash, LLC | Illinois |
| Zero Labs, Inc. | California |