| Efcuk Ltd | Poole | 2026 |
| Efdc UK Ltd | Wembley | 2026 |
| Effe MCC Ltd | Johnstone | 2025 |
| Effective Event Solutions Ltd | Oxford | 2004 |
| Effective Fitness Limited | Hessle | 2017 |
| Effects Engineering Limited | Chinnor | 2017 |
| Effectus Theatre Ltd | Selby | 2021 |
| Efficient Body Limited | Llanelli | 2005 |
| Efficient Exercise Limited | Edinburgh | 2025 |
| Effin Records Limited | Lancashire | 2002 |
| Effingham & Leatherhead Rugby Football Club Limited | Leatherhead | 2023 |
| Effingham Golf Club Limited(The) | Surrey | 1939 |
| Efflam Ltd | London | 2021 |
| Effori Sports Advisors Ltd | London | 2018 |
| Effort Economy Ltd | Tenterden | 2026 |
| Effort Over Environment Ltd | London | 2024 |
| Effortless Gym Ltd | Christchurch | 2025 |
| Effy Studios Ltd | Cambridge | 2025 |
| Efighting League Limited | London | 2018 |
| Efit Limited | Bolton | 2024 |
| Efittest Limited | Wembley | 2022 |
| Eflb Ltd | London | 2025 |
| Eflgg Limited | Cardiff | 2020 |
| Eforiro Limited | London | 2019 |
| Efpi Records | Manchester | 2020 |
| EFS Sports Ltd | Leeds | 2016 |
| Efso Ltd | Chiswick | 2013 |
| EG Archery Limited | Cirencester | 2022 |
| EG Equestrian Limited | Bristol | 2013 |
| EG Lifestyle Health and Fitness Ltd | London | 2018 |
| EG Touring Ltd | Walton-On-Thames | 2022 |
| EGA Nation Limited | London | 2025 |
| Egan Knight International Sports Management Limited | Dunstable | 2023 |
| Egan's Comedy Club Ltd | London | 2022 |
| Egerton Kent Archives Limited | Ashford | 2023 |
| Egerton Park Indoor Bowls Club Limited | Bexhill | 1967 |
| Egerton Studios Ltd | London | 2024 |
| Egerton Woods Limited | Near Heathfield | 1972 |
| Egerton-Peters Foundation | London | 2020 |
| EGG and Spoon Holdings Limited | Cambridge | 2018 |
| EGG Box Theatre Ltd | Worksop | 2014 |
| EGG CUP Media Limited | Crockham Hill | 2013 |
| EGG Entertainment Ltd | Hertfordshire | 2021 |
| Egghouse Ltd | Leatherhead | 2025 |
| Eggleys Ltd. | Warlingham | 2017 |
| Eggmonkey Lincoln Ltd | Boston | 2024 |
| Eggmonkey UN Limited | Boston | 2024 |
| Eggs Collective CIC | Manchester | 2016 |
| Eggsact Limited | Oxfordshire | 2000 |
| Egham Artisans CIC | Egham | 2023 |
| Egham Boxing CIC | Egham | 2024 |
| Egham Town Football Club Limited | Harrow | 1992 |
| Eghc Academy Limited | Oxted | 2015 |
| Eghc Ecomm Ltd | East Grinstead | 2021 |
| Eghc Performance Limited | Oxted | 2011 |
| Eghs Limited | Templecombe | 2000 |
| EGL Entertainment Limited | Birmingham | 2026 |
| Egle Kolev Art Limited | Heywood | 2023 |
| Eglinton Community | | 1997 |
| Eglinton Equestrian Limited | Eglinton | 1999 |
| Eglon Media Limited | Ledbury | 2001 |
| EGM Productions Ltd | Leamington Spa | 2024 |
| EGO Performance Company Ltd. | Coventry | 2008 |
| Egpt Personal Training Ltd | Weymouth | 2023 |
| Egremont and Area Regeneration Partnership Limited | Egremont | 2004 |
| EGS Racing Limited | Doncaster | 2026 |
| Eguegu Limited | London | 2025 |
| EGV26 Limited | Hayes | 2024 |
| EGW Leeds Ltd | Leeds | 2019 |
| Egyptian Halls Building Preservation Trust | Dundee | 2014 |
| EH Fitness (Edinburgh) Ltd | Balerno | 2021 |
| EH Fitness Ltd | Hitchin | 2020 |
| EH Group Ltd | London | 2021 |
| EH Race Events Limited | Sidcup | 2016 |
| EH1876 Ltd | London | 2025 |
| EHA Racing Limited | London | 2015 |
| EHG Events Ltd | Londonderry | 2024 |
| EHG Sports Consulting Limited | Ingatestone | 2025 |
| EHJ Trading Ltd | Hornchurch | 2015 |
| EHM Sports Limited | London | 2017 |
| Ehne Limited | Porstmouth | 2022 |
| EHP Theatre Productions Limited | Glasgow | 2023 |
| EHR Artists Ltd | Fareham | 2025 |
| Ehrentreu Trust Fund | Manchester | 2002 |
| EHS Entertainment Ltd | Harrow | 2025 |
| EHU Theatre Arts Ltd | Wickford | 2018 |
| EI3 Promotions Ltd | Leicester | 2026 |
| EIB Music Limited | Worthing | 2016 |
| EIC Racing Ltd | Newmarket | 2022 |
| EID Mela Ltd | Birmingham | 2023 |
| Eidetic Memory Ltd | Bristol | 2011 |
| Eidurtri Ltd | Bridgend | 2024 |
| Eifleague Ltd | Barnet | 2025 |
| Eiger Events Limited | Weston-Super-Mare | 2012 |
| Eiger Sport & Business Performance Ltd | Inverkeithing | 2014 |
| Eight Bucks Limited | London | 2024 |
| Eight Elliott Limited | London | 2026 |
| Eight Grey Limited | St. Austell | 2006 |
| Eight Lane Investments Ltd | Maidstone | 2023 |
| Eight Little Feet Ltd | Telford | 2022 |