| Wyvern Optical / WyvernOptical |
| Wyvern Organ Builders Ltd / WyvernOrganBuildersLtd |
| Wyvern Partnership / WyvernPartnership |
| Wyvern Partnership-Devizes / WyvernPartnershipDevizes |
| Wyvern Sheet Metal and Fabrications Ltd / WyvernSheetMetalandFabricationsLtd |
| Wyverne Precision Engineering Ltd / WyvernePrecisionEngineeringLtd |
| Wyvex Media Ltd / WyvexMediaLtd |
| Wyvis Plant and Power Ltd / WyvisPlantandPowerLtd |
| Wyziwyg Ltd / WyziwygLtd |