| Ensco 928 Limited | Hereford | 2012 |
| Ensemble Arts Ltd | Worcester Park | 2026 |
| Ensemble Cambrica Ltd | Pontyclun | 2004 |
| Ensemble Cymru | Bangor | 2001 |
| Ensemble NOT Found CIC | London | 2024 |
| Ensemble Orquesta | Hastings | 2020 |
| Ensemble Performing Arts Education C.I.C. | Chester | 2025 |
| Ensemble Performing Arts Limited | Cardiff | 2016 |
| Ensemble Plus Ultra Ltd | London | 2011 |
| Ensemble Productions Limited | London | 1998 |
| Ensemble Rugby Limited | Newport | 2016 |
| Ensemble Stories Ltd | London | 2021 |
| Ensemble Tempus Fugit | Purley | 2017 |
| Ensign Leisure Limited | Horsham | 1998 |
| Ensign Motorsports Limited | Exmouth | 2024 |
| Enso Creative Arts CIC | Burnley | 2023 |
| Enso Equestrian Ltd | London | 2019 |
| Enso Events & Creative Ltd | Swansea | 2020 |
| Enso Jiujitsu Academy Limited | Colchester | 2022 |
| Ensonglopedia | Worthing | 2019 |
| Enspire Clubs Ltd | Twickenham | 2026 |
| Enstan Land Limited | London | 2024 |
| Enstone Park Flying Club Limited | London | 2023 |
| ENT Co (2019) Ltd | Paisley | 2019 |
| ENT Productions Limited | Exeter | 2026 |
| Ent-Events Ltd | Swindon | 2025 |
| Entasia Music Ltd | Liverpool | 2026 |
| Entech International Ltd | Sheffield | 2015 |
| Entedi (UK) Limited | Newtownabbey | 2019 |
| Enteetainment Limited | High Wycombe | 2008 |
| Entente Distribution Limited | | 1991 |
| Enter Events Ltd | Bournemouth | 2016 |
| Enter Prizes Ltd | London | 2024 |
| Enterprise X Limited | Dunmow | 2005 |
| Enterstageright Theatre Ltd | London | 2024 |
| Entert@Inment Solutions Ltd | Sutton Coldfield | 2022 |
| Entertain YOU Limited | East Grinstead | 2026 |
| Entertainarts Limited | Romford | 2009 |
| Entertainers (London) Limited | London | 1962 |
| Entertainers (Magic of Motown) Ltd | London | 2012 |
| Entertainers Agency Limited | London | 2007 |
| Entertainers Cirque Ltd | London | 2022 |
| Entertainers Co. Limited | London | 2001 |
| Entertainers International Ltd | London | 2016 |
| Entertainers Worldwide Ltd | London | 2013 |
| Entertaining London Ltd | London | 1997 |
| Entertaining Minds Ltd | Macclesfield | 2019 |
| Entertainment & Artiste Consultancy Ltd | Skegness | 2017 |
| Entertainment 51 Limited | Cardiff | 2017 |
| Entertainment Broadcast Media and Performing Arts | Potters Bar | 2021 |
| Entertainment Concepts Limited | Blackpool | 2015 |
| Entertainment Connect Ltd | London | 2022 |
| Entertainment Effects Group Ltd | Stevenage | 1997 |
| Entertainment Events Ltd | Waterlooville | 2022 |
| Entertainment Events Organisation Limited | Belfast | 2019 |
| Entertainment Exhibitions International (UK) Ltd | London | 2019 |
| Entertainment Film Distributors Limited | London | 1977 |
| Entertainment Film Productions Limited | London | 1987 |
| Entertainment for Life Limited | Taunton | 2021 |
| Entertainment for Real Ltd | Bedford | 2017 |
| Entertainment Heritage Limited | Stanmore | 2004 |
| Entertainment in Video Limited | London | 1983 |
| Entertainment Lifestyle Ltd | Epsom | 2020 |
| Entertainment Machine Ltd | Glasgow | 2023 |
| Entertainment Rescue Limited | Norwich | 2011 |
| Entertainment Seating Limited | 191 West George Street | 1977 |
| Entertainment Services (Northern) Ltd | Harrogate | 2009 |
| Entertainment Show Productions Ltd | St. Neots | 2019 |
| Entertainment Simulators Co. Limited | Merseyside | 1998 |
| Entertainment Solution Services Limited | Marlow | 2021 |
| Entertainment Theatres Limited | London | 2011 |
| Entertainment Travel Limited | Burgess Hill | 2010 |
| Entertainment Unlimited Limited | Taunton | 2018 |
| Entertainment Whisky Kiss Ltd | Edinburgh | 2025 |
| Entertainment World Ltd | Edgware | 2015 |
| Entertainment Worldwide Ltd | Wetherby | 2014 |
| ENTERTAINMENT12 Ltd | Colwyn Bay | 2022 |
| Entertainmenthouseuk Ltd | Dorchester | 2025 |
| Entertec Limited | Hemel Hempstead | 2005 |
| Entervents Limited | Derby | 2022 |
| Enthuse Television & Events Limited | Hove | 2010 |
| Enticing Elegance Models Ltd | Colchester | 2024 |
| Enticott Music Management Ltd | Southwark | 2014 |
| Entire Inc. Limited | Cardiff | 2021 |
| Entire Performance Coaching Limited | Cardiff | 2021 |
| Entire Production Services Ltd | Buckingham | 2015 |
| Entity Audio Limited | Cullompton | 2007 |
| Entity Events Ltd | Westcliff-On-Sea | 2013 |
| Entity Industries Ltd | Amersham | 2023 |
| Entity Reformer Ltd | Burntwood | 2025 |
| Entnet Ltd | Birmingham | 2012 |
| Entoptic Vision Ltd | Brighton | 2023 |
| Entourage Athletics Ltd | Bangor | 2025 |
| Entourage Sport & Entertainment Limited | London | 2014 |
| Entr'Acte Youth Company CIC | Bridgwater | 2023 |
| Entreprix Limited | Diss | 1987 |
| Entropii Ltd | Hamilton | 2019 |
| Entropy Presents Ltd | London | 2024 |
| Entry Empire Limited | Bury St. Edmunds | 2025 |
| Ents Capital Limited | Bristol | 2014 |