| X Cel |
| X Rite |
| X-Acto |
| Xantrex |
| Xaptum |
| Xcelite |
| Xebec |
| XECRO |
| Xelit |
| Xeltek |
| Xenarc |
| Xenarc Technologies |
| Xenon Fever Defense, Inc. |
| Xentaur Instrument |
| Xentek |
| Xentek Inc |
| Xercon |
| Xerox |
| Xertex |
| XetaWave |
| Xetex |
| Xflight Technologies LLC |
| Xfm |
| XFMRS |
| Xicon |
| Xicor |
| Xidas |
| Xilia |
| Xilinx |
| XinaBox |
| Xinix |
| Xircom |
| XMOS |
| Xomox Corporation |
| Xomox International GmbH & Co |
| Xomox Valve |
| Xp Foresight |
| XP Power |
| Xp Power |
| XP Power |
| Xpelair |
| Xpiq Inc |
| X-ray cermet tube |
| XS Power Batteries |
| Xsens |
| XTAR Technology Inc. |
| Xycom |
| Xycom Vme |
| XYLEM |
| Xylem |
| Xylem Analytics |
| Xylem Flojet |
| Xylem Jabsco |
| Xylem Lowara |
| Xylem LVM |
| Xylem Water Solutions Deutschland GmbH |
| Xylogics |
| Xymox Technologies |
| Xyz Electronics |
| Xzel |
