| Enlon Grand International Education Consulting Ltd | Education | 2024 |
| Enmex Limited | Administrative & support | 2004 |
| Ennemix Holdings Limited | Extraterritorial | 1967 |
| Ennemix PLC | Extraterritorial | 1994 |
| Enogas Limited | Financial services | 2016 |
| Enovouk Ltd | Wholesale & retail | 2015 |
| Enpower Ltd | Wholesale & retail | 2020 |
| Enpure Limited | Construction | 2022 |
| Enrate UK Limited | Construction | 2024 |
| Enre Consulting Ltd | Professional & scientific | 2018 |
| Enrich Your Career Ltd | Administrative & support | 2024 |
| Enriched Care Limited | Health & social care | 2015 |
| Enrion Limited | Wholesale & retail | 2025 |
| Enron Maintenance Ltd | Manufacturing | 2019 |
| Enroute Group CIC | Other services | 2022 |
| ENS Optical Ltd | Wholesale & retail | 2012 |
| Ensco 1067 Limited | Manufacturing | 2014 |
| Ensco 1076 Limited | Extraterritorial | 2014 |
| Ensco 1111 Limited | Extraterritorial | 2015 |
| Ensco 1166 Limited | Real estate | 2016 |
| Ensco 1177 Limited | Information & communication | 2016 |
| Ensco 1309 Limited | Professional & scientific | 2018 |
| Ensco 1359 Limited | Professional & scientific | 2019 |
| Ensco 1370 Limited | Professional & scientific | 2020 |
| Ensco 1400 Limited | Professional & scientific | 2021 |
| Ensco 1424 Limited | Professional & scientific | 2021 |
| Ensco 1444 Limited | Professional & scientific | 2022 |
| Ensco 1514 Limited | Professional & scientific | 2023 |
| Ensco 1518 Limited | Professional & scientific | 2023 |
| Ensco 624 Limited | Financial services | 2007 |
| Ensco 722 Limited | Professional & scientific | 2009 |
| Ensco Trustee Company Limited | Professional & scientific | 2010 |
| Ensf Limited | Real estate | 2020 |
| Ensign Highways Holdings Limited | Construction | 2004 |
| Ensign Highways Limited | Construction | 2004 |
| Enso Homes Ltd | Real estate | 2024 |
| Ensto UK Limited | Manufacturing | 1979 |
| Ensure Personnel Ltd | Administrative & support | 2020 |
| ENT Expert Ltd | Health & social care | 2018 |
| Entaryi Enterprises Ltd | Wholesale & retail | 2021 |
| Entat Ltd | Wholesale & retail | 2025 |
| Entdoctor Limited | Health & social care | 2020 |
| Entec Capital Corp. UK. Ltd | Professional & scientific | 2025 |
| Entec Capital Holdings UK Ltd | Financial services | 2025 |
| Entec Global Limited | Professional & scientific | 2012 |
| Entec International Limited | Administrative & support | 1989 |
| Entec SI Limited | Information & communication | 1996 |
| Entellie Ltd | Wholesale & retail | 2024 |
| Enter Stage Limited | Other services | 2018 |
| Entercode Limited | Construction | 2011 |
| Enterprise & Quality Solutions Ltd | Information & communication | 2011 |
| Enterprise (U.K) Ltd | Administrative & support | 2017 |
| Enterprise 76 Ltd | Hospitality | 2024 |
| Enterprise 8 Financial Services Ltd | Information & communication | 2016 |
| Enterprise Centre for Global Sustainable Service Limited | Professional & scientific | 2024 |
| Enterprise Consultancy Services Ltd | Information & communication | 2023 |
| Enterprise Electrical Services Limited | Construction | 1996 |
| Enterprise KM Ltd | Real estate | 2021 |
| Enterprise Locums Ltd | Health & social care | 2013 |
| Enterprise Logistics Ltd | Transport & logistics | 2012 |
| Enterprise Parking Solutions Ltd | Administrative & support | 2017 |
| Enterprise Sales & Distribution Limited | Wholesale & retail | 2002 |
| Enterprise Scaffold Services Ltd | Construction | 2022 |
| Enterprise Stocks Ltd | Other services | 2024 |
| Enterprise Taxi Hire Limited | Administrative & support | 2026 |
| Enterprise Training 2 Limited | Financial services | 2020 |
| Enterprise Training 3 Limited | Financial services | 2020 |
| Enterprise World Ltd | Wholesale & retail | 2022 |
| Entertainment Media Camera Limited Limited | Administrative & support | 2025 |
| Entertainments Direct Limited | Professional & scientific | 2009 |
| Entity IT Solution Ltd | Wholesale & retail | 2015 |
| Entnet Ltd | Arts & recreation | 2012 |
| Entouraj Ltd | Hospitality | 2018 |
| Entprades Ltd | Health & social care | 2024 |
| Entropy Services Ltd | Administrative & support | 2021 |
| Entrycom Security Systems Ltd | Administrative & support | 2020 |
| Entyr Resources Limited | Wholesale & retail | 2024 |
| Envara Consulting Limited | Professional & scientific | 2026 |
| Envaro Limited | Wholesale & retail | 2022 |
| Envera Telecommunications Limited | Information & communication | 2017 |
| Envi Electrical Services Limited | Construction | 2025 |
| Envie Roses 156 Limited | Wholesale & retail | 2021 |
| Envieco Ltd | Administrative & support | 2024 |
| Envifit Limited | Other services | 2021 |
| Enville Limited | Financial services | 2003 |
| Enviro City Limited | Water & waste | 2013 |
| Enviro Pallets Solutions Ltd | Transport & logistics | 2021 |
| Enviro Security Services Ltd | Administrative & support | 2021 |
| Envirodental (Dental Environment Providers) UK Ltd | Health & social care | 2012 |
| Envirodrains (Birmingham) Limited | Extraterritorial | 2012 |
| Enviroglide Systems Ltd | Information & communication | 2022 |
| Environmental Building Maintenance Limited | Professional & scientific | 1982 |
| Environmental Compliance & Services Ltd | Professional & scientific | 2013 |
| Environmental Computer Recycling and Removals Limited | Other services | 2010 |
| Environmental Concern Limited | Water & waste | 1988 |
| Environmental Heating Services Limited | Manufacturing | 2007 |
| Environmental Housing Ltd | Construction | 2024 |
| Environmental Property Clearance Limited | Administrative & support | 2015 |
| Environmental Systems Ltd | Construction | 2019 |
| Environmental Warriors CIC | Education | 2011 |