- x Lumber
- Xanadu
- XCEL Energy
- Xelan
- XETA Technologies
- Xm Satellite Radio
- Xpect First Aid
- Xpedite Systems
- Xpedx Paper & Graphics
- Xpedx Paper Store
- Xpress Cash
- Xpress Lube
- X-Press Rent-A-Car
- X-Press Tax Refunds
- X-Pressions
- X-Ray Associates
- Xsport Fitness
- XTO Energy
- X-Tra Cash
- XTRA Mart
- Xtreme Clean
- X-Treme Fitness
- Xtreme Tan
- Xtreme Wireless