| Worksnug | |
| Workspace Group plc | |
| Workspace Technology Ltd | West Midlands |
| Workstream Automation Ltd | |
| Workwell Outsourcing | |
| World Agri-Tech Innovation Summit | |
| World Continuing Education Alliance | |
| World Makers | |
| World of Computers Ltd | Cambridgeshire |
| World Summit AI Ltd | Greater London |
| World Time Solutions Ltd | Buckinghamshire |
| WorldPop | |
| Worldr Technologies | |
| Worldwide Design Ltd | East Sussex |
| Worldwide Web Management Ltd | Greater London |
| WorldWideWebs | Berkshire |
| Worldzone.co.uk | Greater London |
| Worn Again Technologies | |
| Woven Agency | |
| Wow Search Ltd | |
| Wow Zone Ltd | West Midlands |
| WowTel | |
| WOWWOO Ltd | |
| Woya Digital | West Sussex |
| WP Agency Ltd | |
| WP Bolt | Berkshire |
| WP Design London Ltd | Greater London |
| WP North East | |
| WPC Software Ltd | Bristol |
| Wplace Tech Ltd | Greater London |
| WPP plc | |
| Wrapped Brand Agency Ltd | |
| Wray Castle Ltd | Cumbria |
| WRB Design Ltd | Greater London |
| Wrekin Circuits Ltd | Shropshire |
| WrenUK | Buckinghamshire |
| Wriggle | Greater London |
| Wriggle Marketing | |
| Wrightech | |
| Wrisk | Greater London |
| Writtle University College | |
| Wrotham Computer Care Ltd | Kent |
| Wroxham Computer Services Ltd | |
| WSE Ltd | West Midlands |
| WSEO Ltd | |
| WSI Digital Web | Belfast |
| WSI-eMarketing.com | Gloucestershire |
| WSS Ltd | |
| WT Designs | |
| WTL UK | West Midlands |