| Elliott Bauer Financial Limited | Financial services | 2006 |
| Ellis Ferris Wheel Ltd | Administrative & support | 2024 |
| Ellis Fixing Limited | Construction | 2005 |
| Ellison & Co. (Trustees) Limited | Professional & scientific | 1962 |
| Ellison Art Glass Limited | Manufacturing | 2008 |
| Ellison Conveyancers Ltd. | Professional & scientific | 1998 |
| Ellisons Legal LLP | | 2022 |
| Ellisons Solicitors Limited | Professional & scientific | 1996 |
| Ellrose Assets Limited | Hospitality | 2020 |
| Ellyget Advisory Limited | Information & communication | 2026 |
| ELM Farm Management Company Limited | Real estate | 2020 |
| ELM Farm Storage Limited | Administrative & support | 2023 |
| ELM Tree Garden Services Limited | Administrative & support | 2019 |
| Elma Talent Ltd | Administrative & support | 2025 |
| Elmar Associates Ltd. | Other services | 1996 |
| Elmbury (City) Limited | Construction | 1992 |
| Elmbury Building Services Limited | Professional & scientific | 1995 |
| Elmden Court Residents Association Limited | Households | 1974 |
| Elms Design Ltd. | Professional & scientific | 1996 |
| Elms Farmhouse Limited | Real estate | 2011 |
| Elms Price Estates Limited | Real estate | 1990 |
| Elms Price Lettings Limited | Real estate | 1992 |
| Elmstead Fishing Tackle Ltd | Wholesale & retail | 2020 |
| Elmstead Nursery Limited | Education | 1999 |
| Elmstead Restaurant Limited | Administrative & support | 2015 |
| Elmtree Graphics Limited | Manufacturing | 1990 |
| Elmwood IB Limited | Financial services | 2021 |
| Elmwood Residents Company Limited | Households | 1997 |
| ELO Haulage Ltd | Transport & logistics | 2020 |
| Elocin Home Ltd | Professional & scientific | 2023 |
| Elom Health Care Ltd | Health & social care | 2019 |
| Elosac Group Ltd | Professional & scientific | 2025 |
| Elpaal Group Limited | Real estate | 2020 |
| Elran Medical Enterprise Ltd | Health & social care | 2020 |
| Elroila Home Ltd | Real estate | 2025 |
| Elsar Limited | Construction | 2012 |
| Elsom Recruitment Ltd | Administrative & support | 2023 |
| Elson Estates Ltd | Real estate | 2023 |
| Elton House (Dedham) Management Company Limited | Households | 1986 |
| Elvanite Full Circle Limited | Real estate | 1996 |
| Elvengate Properties Limited | Real estate | 2021 |
| Elvyna Consulting Limited | Professional & scientific | 2020 |
| Elysian Gardens Limited | Administrative & support | 2017 |
| Elysium Home Collection Ltd | Wholesale & retail | 2026 |
| Elysium Motors Ltd | Wholesale & retail | 2025 |
| Elysium-Bel Ltd | Real estate | 2022 |
| Emanuel Care Limited | Health & social care | 2017 |
| Embann Hair Ltd | Other services | 2024 |
| Emberix Grill Ltd | Wholesale & retail | 2026 |
| Emberworth Limited | Real estate | 1988 |
| Emboscada UK Ltd | Wholesale & retail | 2019 |
| Embra Court RTM Company Ltd | Other services | 2015 |
| Embrace Eco Ltd | Wholesale & retail | 2025 |
| Embrace Project Management Ltd | Professional & scientific | 2026 |
| EMC Energy Solutions Limited | Professional & scientific | 2015 |
| Ementine Medical Limited | Health & social care | 2024 |
| Emerald Eats Ltd | Hospitality | 2024 |
| Emerald Executive UK Limited | Transport & logistics | 2007 |
| Emerald House Holdings Ltd | Financial services | 2025 |
| Emerald IT Consults Ltd | Information & communication | 2013 |
| Emerald Power and Energy Facilities Services Ltd | Administrative & support | 2015 |
| Emerald Properties & Renovations Ltd | Real estate | 2024 |
| Emerald Resins Limited | Construction | 2013 |
| Emergent Projects Ltd | Construction | 2023 |
| Emerging Risks Media Limited | Information & communication | 2020 |
| Emery (IFA) Limited | Financial services | 1999 |
| Emey Care Ltd | Public administration | 2024 |
| EMF Supported Housing Ltd | Real estate | 2025 |
| Emily Anna Limited | Professional & scientific | 2021 |
| Emily MAT Transport Ltd | Transport & logistics | 2025 |
| Emily Olney Ltd | Hospitality | 2025 |
| Emily Sings Limited | Arts & recreation | 2025 |
| Eminent Flow Ltd | Wholesale & retail | 2026 |
| Emma Birchley Media Ltd | Professional & scientific | 2016 |
| Emma Farrar Consultancy Ltd | Professional & scientific | 2023 |
| Emma Richards Bookkeeping Services Limited | Professional & scientific | 2026 |
| Emma Turner Limited | Administrative & support | 2025 |
| Emma-Jane Aesthetics Ltd | Other services | 2022 |
| Emmabella Properties Ltd | Real estate | 2023 |
| Emmadoris Ltd | Health & social care | 2010 |
| Emmaus Colchester | Wholesale & retail | 1999 |
| Emotionally Well Communities CIC | Health & social care | 2024 |
| Emperor Oven, Carpet & Exterior Cleaning Services Limited | Administrative & support | 2022 |
| Empire Court Management Limited | Households | 1990 |
| Empire House Investments Limited | Real estate | 1991 |
| Empire Roofing & Building Services Ltd | Construction | 2020 |
| Empire Tuning Limited | Information & communication | 2013 |
| Empowered Energy Services Ltd | Construction | 2024 |
| Empowered Property Ltd | Financial services | 2021 |
| Empowered Social Work Limited | Health & social care | 2023 |
| Empowering Skills Network Ltd | Administrative & support | 2025 |
| Empress Studio Ltd | Arts & recreation | 2017 |
| EMS World Ltd | Wholesale & retail | 2021 |
| Emsworth Consulting Limited | Financial services | 2011 |
| EMT Barber Ltd | Other services | 2024 |
| EMT Entertainment Ltd | Hospitality | 2019 |
| EN Holdings Limited | Professional & scientific | 2017 |
| Enablearc Ltd | Information & communication | 2025 |
| Enclosure Solutions Ltd | Wholesale & retail | 2023 |
| Encompass Equality Ltd | Administrative & support | 2017 |