| English Classics Racing Limited | Aldershot | 1995 |
| English Crown Green Bowling Association Ltd | Stourbridge | 2013 |
| English Crown Green Bowls Association Ltd | Stourbridge | 2013 |
| English Genie Limited | Wembley | 2011 |
| English Import Company Limited(The) | Fulham | 1926 |
| English in York Limited | York | 1980 |
| English Roadsters Limited | Kidderminster | 2005 |
| English Rose (UK) Limited | Crawley | 1998 |
| English Rose Couture (the Sewing Queen) Limited | Stoke-On-Trent | 2014 |
| English Rural Action Limited | Bridgwater | 2006 |
| English Shop Property Limited | Liverpool | 2011 |
| English Tile Company Limited | Waterlooville | 2005 |
| English Village Salads Limited | London | 1963 |
| Englishmans Limited | Hartlepool | 2010 |
| Englorious Ltd | Wednesbury | 2013 |
| Englund Investment Limited | London | 2017 |
| Engst Fertilizers Co., Ltd | London | 2022 |
| Enham Binders Limited | Andover | 2004 |
| Enhance Accountancy Limited | Bala | 2012 |
| Enhance Environmental Limited | Bedford | 2012 |
| Enhance Payroll Solutions Limited | Gloucester | 1989 |
| Enhancebysade Ltd | London | 2024 |
| Enhanced Care Limited | Gateshead | 2012 |
| Enhanced Parent and Child Services Ltd | Bolton | 2013 |
| Enhanced Profitability Ltd | London | 2024 |
| ENI Ltd UK Ltd | Luton | 2025 |
| Enigma Defence Ltd | Evesham | 2025 |
| Enigma Industries Ltd. | Glasgow | 2022 |
| Enigma Laundries Limited | Crawley | 1980 |
| Enigma Lighting Limited | Bordon | 2000 |
| Enigma Maintenance Ltd | London | 2016 |
| Enigma Mortgage Solutions Limited | Wakefield | 2023 |
| Enigma Rise Capital Ltd | Manchester | 2026 |
| Enigma Services Group Limited | Crawley | 1897 |
| Enigma Yachting Ltd | London | 2023 |
| Enigmatic Solutions Limited | Manchester | 2024 |
| Eniko Limited | Bradford | 2020 |
| Enitharmon Press Limited | Alton | 2010 |
| Enjoin Care Limited | Hayes | 2021 |
| Enjoy Britain Limited | Peterborough | 2007 |
| Enjoy Energy Limited | London | 2024 |
| Enjoy the Moment Ltd | Newport | 2019 |
| Enjoy Turbo Ltd | Wisbech | 2020 |
| Enjoyment Limited | Harrogate | 2012 |
| Enka Marine Ltd | London | 2025 |
| Enkey Limited | Annan | 2023 |
| Enki Group Ltd | London | 2024 |
| Enko Maintenance Ltd | East Grinstead | 2017 |
| ENL Acoustics Limited | Hayling Island | 2021 |
| Enlight Communications Limited | Loddon | 2010 |
| Enlight International OIL (UK) Limited | London | 2009 |
| Enlight Limited | Loddon | 2015 |
| Enlight Technology Group Limited | Loddon | 2010 |
| Enlighted Mind Ltd | London | 2023 |
| Enlighten Design Limited | Wylam | 2003 |
| Enlightened Events Limited | London | 2023 |
| Enlightened Minds Africa Limited | Burton-On-Trent | 2022 |
| Enliven Limited | Banbury | 1998 |
| Enming Art Stone Co., Ltd. | Cambridge | 2012 |
| Enmson Electric Ltd | Cambridge | 2018 |
| Ennemix Holdings Limited | Birmingham | 1967 |
| Ennemix PLC | Birmingham | 1994 |
| Ennerdale Leisure Ltd. | Carlisle | 2019 |
| Ennia Fashions Ltd | Brighton | 2018 |
| Enniskillen Skip Hire & Recycling Limited | Enniskillen | 2011 |
| Ennismore Development Ltd | Bristol | 2024 |
| Ennismore Hall Services Limited | Ballymena | 2004 |
| Enno Kuettner - Intelligent Mental Health Ltd | London | 2014 |
| Ennor (SGL Realisations) Limited | Marazion | 2013 |
| Eno-One Ltd | London | 2022 |
| Enom Ltd | London | 2022 |
| Enovert Limited | Stafford | 2017 |
| Enpai Group Ltd | Beckenham | 2015 |
| Enquest Energy Limited | London | 1971 |
| Enrich UK Group Ltd | Hampton | 2016 |
| Enrich UK Property Ltd | Hampton | 2016 |
| Enrico Limited | Hitchin | 2022 |
| Enrolll Ltd | London | 2020 |
| Enruptis Ltd | London | 2016 |
| ENS Legis Limited | Monmouth | 2014 |
| Ensa Property Ltd | St. Neots | 2024 |
| Ensak Ltd | Beckenham | 2013 |
| Ensample Limited | Clitheroe | 2014 |
| Ensar Cafe Ltd | London | 2016 |
| Enschenk Pharmaceuticals. Ltd | Beckenham | 2022 |
| Ensco 1076 Limited | Birmingham | 2014 |
| Ensco 1111 Limited | Birmingham | 2015 |
| Ensco 1416 Limited | Lincoln | 2021 |
| Ensco 1516 Limited | Lothian | 2002 |
| Ensco 818 Limited | Altrincham | 2010 |
| Ensco 963 Limited | Gerrards Cross | 2012 |
| Enship Limited | Aberdeen | 2004 |
| Ensign Enterprises Limited | Portsmouth | 2012 |
| Ensign Regalia Limited | Liverpool | 2003 |
| Ensignia Limited | London | 2025 |
| Ensor Consulting Limited | King'S Lynn | 2010 |
| Ensuke Education & Publication Ltd | Ramsgate | 2021 |
| Entador Systems Limited | Poole | 2018 |
| Entastic Ltd | Stowmarket | 2024 |
| Entec Systems London Limited | London | 2016 |