| Xeniapp, Inc. | New York |
| Xenix Medical | Florida |
| XENNEO | Florida |
| Xennsoft, LLC | Utah |
| Xeno Biosciences, Inc. | |
| Xeno Design, Inc. | California |
| Xeno Diagnostics, LLC | Indiana |
| Xeno Media, Inc. | Illinois |
| Xenobe Research Institute | |
| Xenocor | Utah |
| Xenogenix, LLC | Colorado |
| Xenon Corporation | Massachusetts |
| Xenoss | New York |
| XenoTech | New York |
| Xensor Corporation | Pennsylvania |
| Xentaurs | California |
| Xentria | Illinois |
| Xentris Wireless, LLC | Illinois |
| Xequel Bio | Texas |
| Xeran | Massachusetts |
| Xerdict, LLC | New Jersey |
| Xeric Design Ltd | Nevada |
| Xerillion Corporation | Illinois |
| Xerion Advanced Battery Corporation | Ohio |
| Xerious Solutions | Louisiana |
| Xeris Biopharma Holdings, Inc. | Illinois |
| Xeris Biopharma Holdings, Inc. | |
| Xeroproject | District of Columbia |
| Xerox Corporation | Connecticut |
| Xert Communications Corporation | Virginia |
| XESS Corporation | North Carolina |
| Xesto, Inc. | |
| XetHub | |
| Xetra Networks, Inc. | California |
| Xevo | Washington |
| Xfernet | California |
| Xfinion, Inc. | Virginia |
| Xfinity | Pennsylvania |
| Xfund | California |
| XFX Technologies, Inc. | California |
| XG Ventures | California |
| Xgaming X-Arcade | Pennsylvania |
| XHEO, Inc. | California |
| XHTMLJunction | California |
| Xi Computer | California |
| Xi Graphics, Inc. | Colorado |
| Xiacom, Inc. | New York |
| Xicomm, LLC | California |
| XID Software, Inc. | Texas |
| XIFIN, Inc. | California |