| Estate Solutions | |
| eSterling Ltd | West Midlands |
| Estie Web Solutuion | |
| Estona Internet Marketing | East Sussex |
| eSwapp Ltd | |
| Esynergy | |
| ET Capital Ltd | Cambridgeshire |
| ET Power Systems Ltd | Derbyshire |
| etc.. | Norfolk |
| Etcembly Ltd | |
| Eteach UK Ltd | |
| EteSync Ltd | |
| ETF Partners | |
| Ether Creative | |
| Ethernet Servers Ltd | |
| EthernetCables.co.uk | Merseyside |
| EthosData | |
| Etive Technologies Ltd | |
| ETL Systems Ltd | |
| Etopia Solutions | Glasgow |
| etr webdesign | Gloucestershire |
| EU Automation | |
| Euclid Ltd | Hampshire |
| EUdesign | Surrey |
| eukhost Ltd | West Yorkshire |
| Euklid Ltd | Greater London |
| Euler | |
| Euler Finance | |
| Eunomia | |
| Euphoric Digital Ltd | |
| Eureka Solutions (Scotland) Ltd | |
| Eureka! Software | West Midlands |
| Euro Computers Direct | Norfolk |
| Euro Digital Systems Ltd | |
| Euro-Tech | Greater London |
| Eurocables | Belfast |
| Euroclad Group Ltd | |
| Eurocoms Ltd | South Yorkshire |
| Eurofins E&E ETC Ltd | Devon |
| EuroJobsites | |
| Euroland IT Services | Greater London |
| EuroNet Solutions Ltd | Greater Manchester |
| Euronetwork Ltd | Buckinghamshire |
| Europa Technologies Ltd | Surrey |
| Europages | |
| Europe Fintech Awards | |
| Europe PMC | |
| European Astrotech Ltd | |
| European Bioinformatics Institute | Cambridgeshire |
| European Competitive Telecommunications Association | Berkshire |