| Ecco Software Ltd | Information & communication | 2024 |
| ECE Electrical Limited | Construction | 2006 |
| Eceni Consulting Limited | Information & communication | 2017 |
| ECG Electrical Limited | Construction | 2019 |
| Echidna Properties Ltd | Real estate | 2013 |
| Echo ARC Ltd | Information & communication | 2024 |
| Echo Youth Theatre C.I.C. | Arts & recreation | 2017 |
| ECI Tech Limited | Professional & scientific | 2023 |
| Eclipse Wholesale Ltd | Wholesale & retail | 2019 |
| Eco AGE Limited | Administrative & support | 2006 |
| Eco Anglia Limited | Construction | 2012 |
| Eco Barn Conversions Limited | Construction | 2004 |
| Eco Benchmade Ltd | Manufacturing | 2024 |
| Eco Colour Print Limited | Extraterritorial | 2010 |
| Eco Cooling Services Limited | Construction | 2023 |
| Eco Design Holdings Ltd | Financial services | 2025 |
| Eco Design Living Ltd | Construction | 2019 |
| Eco Design Rutland Ltd | Construction | 2025 |
| Eco Echo Ltd | Administrative & support | 2020 |
| Eco Fibercrafts Ltd | Wholesale & retail | 2024 |
| Eco Home EA Limited | Real estate | 2022 |
| Eco Measures Ltd | Professional & scientific | 2020 |
| Eco Plumb and Heating Limited | Construction | 2025 |
| Eco RIG Access Limited | Professional & scientific | 2025 |
| Eco Salon Partners Ltd | Other services | 2025 |
| Eco Savings Limited | Information & communication | 2018 |
| Eco Vapours Limited | Wholesale & retail | 2014 |
| Eco-Boilers Limited | Construction | 2017 |
| Eco-Classrooms Limited | Professional & scientific | 2010 |
| Ecobest Limited | Health & social care | 2023 |
| Ecofox Property Ltd | Real estate | 2021 |
| Ecoglass Holdings Limited | Manufacturing | 2016 |
| Ecoglass Limited | Construction | 1949 |
| Ecology Norfolk Limited | Professional & scientific | 2024 |
| Ecolta Ltd | Other services | 2020 |
| Ecoman Limited | Professional & scientific | 2009 |
| Ecopure Solutions Ltd | Water & waste | 2020 |
| Ecoscout Ltd | Administrative & support | 2011 |
| Ecoshine Cleaning Group Ltd | Administrative & support | 2025 |
| Ecospark Electrical Ltd | Construction | 2026 |
| Ecosport Innovations Ltd | Professional & scientific | 2025 |
| Ecostessey Park Management Limited | Households | 2008 |
| Ecotech Heating Ltd | Construction | 2007 |
| Ecotherapy Farm CIC | Agriculture & fishing | 2024 |
| ECR Brakes Ltd | Wholesale & retail | 2024 |
| ECR Car Parts Ltd | Wholesale & retail | 2012 |
| ECS (Holdings) Limited | Professional & scientific | 2019 |
| ECS Power & Control Limited | Manufacturing | 1993 |
| Ecstatic Creation Limited | Health & social care | 2009 |
| ED Pipework Limited | Construction | 2014 |
| Edakkulam Limited | Health & social care | 2015 |
| Edcana AI Ltd | Information & communication | 2025 |
| Eddwest Ltd | Administrative & support | 2011 |
| Edel Harris Consultancy Limited | Professional & scientific | 2023 |
| Edelux Limited | Construction | 2009 |
| Edelweiss Travel Services Ltd | Transport & logistics | 2025 |
| Eden (Malthouse) Ltd | Construction | 2024 |
| Eden Acquisitions Limited | Energy | 2020 |
| Eden Developments (E.A.) Ltd | Administrative & support | 2020 |
| Eden Garage (Bacton) Limited | Wholesale & retail | 2019 |
| Eden Interim Management Ltd | Professional & scientific | 2024 |
| Eden Relics Ltd | Wholesale & retail | 2026 |
| Eden Square Residents Management Company Limited | Real estate | 2024 |
| Eden Tree & Hedge Care Ltd | Administrative & support | 2006 |
| Eden Valley Contracts Limited | Construction | 2018 |
| Edgars Constructions Limited | Construction | 2021 |
| Edgbaston Cellular Limited | Other services | 2016 |
| Edge Assist Limited | Professional & scientific | 2024 |
| Edge Barns Ltd | Construction | 2020 |
| Edge Charter Ltd | Arts & recreation | 2004 |
| Edge Helicopters Limited | Transport & logistics | 2013 |
| Edge on Your IT Limited | Administrative & support | 2014 |
| Edgewood Homes Limited | Construction | 2017 |
| Edible East C.I.C. | Education | 2022 |
| Edifice Fire Ltd | Manufacturing | 2018 |
| Ediform Limited | Manufacturing | 2023 |
| Edith Cavell Limited | Extraterritorial | 2012 |
| Edith Road 15 Limited | Real estate | 2005 |
| Edmund Parker Management Limited | Households | 2020 |
| Edmunds Cocktails Ltd | Manufacturing | 2018 |
| Edox Limited | Information & communication | 1999 |
| Edsv Limited | Administrative & support | 2019 |
| EDU2 Ltd | Wholesale & retail | 2025 |
| Eduardo Vilarinho Nunes Ltd | Transport & logistics | 2020 |
| Educage Training Limited | Education | 2017 |
| Education Excellence COV Ltd | Education | 2019 |
| Edugrowth Limited | Education | 2019 |
| Eduvateuk Ltd | Professional & scientific | 2019 |
| Edward Clark Estates Limited | Real estate | 2007 |
| Edward Clark Limited | Agriculture & fishing | 2005 |
| Edward Jackson Engineer Limited | Manufacturing | 1978 |
| Edwards & Cubitt Ltd | Construction | 2016 |
| Edwards Allsorts Ltd | Wholesale & retail | 2024 |
| Edwards Engineering Services (Anglia) Limited | Agriculture & fishing | 2007 |
| Edwards Engineers Limited | Professional & scientific | 2024 |
| Edwards Restaurants Holdings Ltd | Hospitality | 2016 |
| Edwards Store Limited | Administrative & support | 2024 |
| Edwil Properties Limited | Real estate | 2026 |
| EE Property Limited | Real estate | 2020 |
| Eecotech Limited | Manufacturing | 2015 |