| EMS UK Events Ltd | Administrative & support | 2013 |
| Encapsula Limited | Manufacturing | 2008 |
| Endeavours (UK) Ltd | Administrative & support | 2004 |
| Endoglobal Ltd | Health & social care | 2019 |
| Energia MAX Ltd | Information & communication | 2026 |
| Enfield Holdings Limited | Professional & scientific | 1934 |
| Enfor Craft Limited | Manufacturing | 2015 |
| Engaged Consulting Limited | Professional & scientific | 2014 |
| English Rose Investments Co Ltd | Professional & scientific | 2012 |
| Enlighted Limited | Financial services | 2022 |
| Enlighten World Limited | Information & communication | 2022 |
| ENO 17 Ltd | Construction | 2014 |
| Ensign House Management Ltd | Households | 2022 |
| Entitas Group Limited | Administrative & support | 2015 |
| Environmental Applications Limited | Professional & scientific | 1999 |
| Environmental Protection Industries Limited | Administrative & support | 1999 |
| EP Projects Limited | Construction | 2019 |
| Epos Direct Europe Ltd | Financial services | 2017 |
| Epos Direct Systems Ltd | Wholesale & retail | 2026 |
| Epping Bathrooms Ltd | Construction | 2022 |
| Epping Doors Ltd | Construction | 2020 |
| Epping Forest Catering Limited | Real estate | 2016 |
| Epping Forest Schools Partnership Trust | Education | 2018 |
| Epping Garden Rooms Limited | Construction | 2020 |
| Epping Sanitary Steam Laundry Company Limited | Other services | 1904 |
| Equity Property Management Services Limited | Real estate | 2018 |
| Er-Uk Limited | Water & waste | 2026 |
| ERB Music Ltd | Professional & scientific | 2024 |
| Erin Surveying Ltd | Professional & scientific | 2024 |
| Erina Properties Holding Ltd | Real estate | 2023 |
| Erinclose Limited | Other services | 2002 |
| ERK Property Management Ltd | Real estate | 2026 |
| Esbike Ltd | Other services | 2023 |
| Espirit Ltd | Manufacturing | 2023 |
| Essential OIL Powders (Europe) Ltd | Manufacturing | 2023 |
| Essex Commercial Services Ltd | Professional & scientific | 2026 |
| Essex Construction Company Limited | Construction | 1937 |
| Essex Cryo Clinic Ltd | Health & social care | 2019 |
| Essex Engineers Supplies Limited | Wholesale & retail | 1983 |
| Essex Event Hire Limited | Other services | 2017 |
| Essex Floating Sound Bath Limited | Other services | 2024 |
| Essex Interactive Limited | Information & communication | 2011 |
| Essex Masonic Property Company Limited | Professional & scientific | 1994 |
| Essex Motor Company Limited | Wholesale & retail | 2005 |
| Essex Promotions Ltd | Arts & recreation | 2024 |
| Essex Property Inventory Services Ltd | Other services | 2013 |
| Essex Road Development Limited | Real estate | 2013 |
| Essex Security Services Limited | Other services | 1979 |
| Essex Sewing Room Limited | Other services | 2018 |
| Essex Specialist Services Limited | Public administration | 1995 |
| Essex Steel Structures Ltd | Construction | 2015 |
| Essex Waste Group Ltd | Water & waste | 2020 |
| Essiauk Ltd | Wholesale & retail | 2020 |
| Estate Home Developments Limited | Construction | 1983 |
| Estate on Ltd | Real estate | 2025 |
| Estate Package Plus Ltd | Real estate | 2025 |
| Esther & Viny Ltd | Construction | 2015 |
| Estia & Co Trading Ltd | Wholesale & retail | 2026 |
| Et&T Group Ltd | Financial services | 2025 |
| Et&T Residential Ltd | Construction | 2023 |
| Etacore Tech Ltd | Transport & logistics | 2026 |
| Etal Limited | Information & communication | 1976 |
| Eterdyn Limited | Information & communication | 2016 |
| Etherm Ltd | Manufacturing | 2012 |
| Ethos Minerals Limited | Mining & quarrying | 2024 |
| Ethos Security & Medical Solutions Ltd | Administrative & support | 2023 |
| Etna Studios Ltd | Professional & scientific | 2018 |
| Etnm Limited | Construction | 2020 |
| Euro Analytics Limited | Professional & scientific | 2016 |
| Euromed International Limited | Information & communication | 1996 |
| European Copper Institute | Other services | 1996 |
| European Pharma Consulting (EPC) Ltd | Financial services | 2021 |
| European Textile Corporation Limited | Wholesale & retail | 1992 |
| Euston Road NW1 Commercial Ltd | Financial services | 2025 |
| EVA Grace Aesthetics Ltd | Other services | 2019 |
| Evaha Amanah Ltd | Wholesale & retail | 2020 |
| Evander London Ltd | Wholesale & retail | 2023 |
| Eveg Investments Limited | Real estate | 2023 |
| Evelyn Mews (Beckton) Management Company Limited | Households | 1994 |
| Ever Homewares Ltd | Wholesale & retail | 2023 |
| Everbrook Building and Interiors Limited | Construction | 2025 |
| Everbrook Limited | Construction | 2023 |
| Everest Financial Group Ltd | Professional & scientific | 2026 |
| Evergreen Digital Ltd | Information & communication | 2018 |
| Everhire Group Ltd | Administrative & support | 2023 |
| Everhome Group Ltd | Real estate | 2024 |
| Everyagent UK Ltd | Real estate | 2023 |
| Evewell Ltd | Health & social care | 2025 |
| Evie's Property and Management Services Ltd | Real estate | 2021 |
| Evolution Aesthetics Clinique Ltd | Other services | 2017 |
| Evolution Atoz Ltd | Administrative & support | 2013 |
| Evolve (Colchester) Limited | Construction | 2018 |
| Evolve (Milton Keynes) Limited | Construction | 2018 |
| Evolve Consultancy Limited | Real estate | 1997 |
| EVP Medical Trading Limited | Administrative & support | 2022 |
| EVS Global (UK) Limited | Information & communication | 2010 |
| Ewds Limited | Construction | 2018 |
| Exalation Limited | Health & social care | 2003 |
| Excel Build Contractors Ltd | Construction | 2022 |
| Excel Building Contractors Ltd | Construction | 2022 |