| Duvern Construction Ltd | Construction | 2026 |
| Dyal Yarmouth Ltd | Hospitality | 2024 |
| Dylan's Auto Sales Ltd | Wholesale & retail | 2025 |
| Dynamic Developments Essex Ltd | Real estate | 2022 |
| Dynamicmotif Dance & Performing Arts Academy Limited | Arts & recreation | 2025 |
| E Duff Leisure Limited | Hospitality | 2025 |
| E J Landscapes Limited | Administrative & support | 2013 |
| E&E Afro-Carribean Market Ltd | Wholesale & retail | 2023 |
| E. and a. Jewellers Limited | Real estate | 1975 |
| E.J. Thurston Limited | Construction | 1973 |
| EA Coatings Ltd | Manufacturing | 2018 |
| Eadulfnesa Limited | Other services | 2015 |
| East Anglia Enterprises Ltd | Health & social care | 2021 |
| East Essex Cloth Nappy Library CIC | Information & communication | 2018 |
| East Fire Risk Assessments Ltd | Professional & scientific | 2024 |
| East of England Innovation Limited | Administrative & support | 2023 |
| Eastside Electrical Services Ltd | Construction | 2020 |
| Easy I T Ltd | Information & communication | 2002 |
| Easygate Properties Limited | Real estate | 2002 |
| Easypick Store EN Limited | Wholesale & retail | 2026 |
| Ebod Group Ltd | Real estate | 2025 |
| EBR Property Management Limited | Households | 2019 |
| Eco Burn Shop Ltd | Wholesale & retail | 2026 |
| Eco Power & Lighting Limited | Extraterritorial | 2011 |
| Ecofleet Asset Management Ltd | Administrative & support | 2025 |
| ED Barber Ltd | Other services | 2024 |
| Eden AC Housing Limited | Real estate | 2020 |
| Edge of Estuary Limited | Hospitality | 2023 |
| Edit Mothership Productions Ltd | Hospitality | 2019 |
| Edith Elms Special School Trust | Education | 2002 |
| Educare Lifeskills Centre Ltd | Health & social care | 2019 |
| Edusafe Limited | Education | 2025 |
| EEC Art Marketing Ltd | Wholesale & retail | 2020 |
| EERTNIA43 LLP | | 2019 |
| Eevt Ltd | Wholesale & retail | 2019 |
| Efficiency Healthcare Services Ltd | Financial services | 2025 |
| Efficiency-For Care Limited | Health & social care | 2015 |
| EHP Electrical Ltd | Construction | 2020 |
| Eivan Ltd | Other services | 2017 |
| EJI Halal Ltd | Wholesale & retail | 2026 |
| EK Supermarket Ltd | Wholesale & retail | 2015 |
| Electric Orange Limited | Information & communication | 2025 |
| Electrical Heating Plumbing Ltd | Manufacturing | 2010 |
| Elementis Boiler Experts Ltd | Construction | 2020 |
| Elevare Business Solutions Ltd | Information & communication | 2024 |
| Elevatewithe Ltd | Wholesale & retail | 2026 |
| Elishavem Properties Ltd | Real estate | 2020 |
| Elite Carpet and Upholstery Cleaning Ltd | Administrative & support | 2015 |
| Elite Property Rentals Ltd | Real estate | 2017 |
| Elizabeth Court Residents RTM Company Limited | Households | 2008 |
| Elizabeth Jayne Photography Limited | Professional & scientific | 2025 |
| ELK Capital Markets UK Ltd | Financial services | 2018 |
| ELK Roofing and Property Maintenance Ltd | Construction | 2024 |
| Ella James H R Limited | Administrative & support | 2019 |
| Ellacott Morris Properties Limited | Real estate | 2020 |
| Ellacott Morris Solutions Ltd | Financial services | 2023 |
| Ellerash Limited | Health & social care | 1988 |
| ELM Farm Country Park Limited | Hospitality | 2008 |
| ELM Tree Care Home Limited | Administrative & support | 2012 |
| Elvis Costello Limited | Arts & recreation | 1980 |
| Emery UK Ltd | Transport & logistics | 2024 |
| EMEX75 Limited | Construction | 2016 |
| Emkay Limited | Professional & scientific | 2015 |
| Emma Somers Consulting Limited | Professional & scientific | 2024 |
| Emmanuel Care Properties Limited | Real estate | 2024 |
| Empire BBQ House Ltd | Hospitality | 2022 |
| Empire Lettings Limited | Real estate | 2002 |
| Endpoint Works Ltd | Water & waste | 2026 |
| Energise Records Limited | Information & communication | 2006 |
| Energy Solutions (Tendring) Ltd | Construction | 2024 |
| Engold Limited | Administrative & support | 2023 |
| Enrich IT Leadership Limited | Information & communication | 2025 |
| Epicbay Limited | Wholesale & retail | 2016 |
| Eranoas Ltd | Wholesale & retail | 2019 |
| Eric IS My Idol Limited | Professional & scientific | 1998 |
| Ernest Holdco 2016 Limited | Professional & scientific | 2016 |
| Ernest Newco 2016 Limited | Professional & scientific | 2016 |
| Ernest Newson & SON Holdings Limited | Real estate | 1947 |
| ES Services Limited | Construction | 2018 |
| ESC (UK) Limited | Information & communication | 2013 |
| Esplanade Food Box Ltd | Hospitality | 2025 |
| Essex and Suffolk Quality Care Ltd. | Health & social care | 2001 |
| Essex Asbestos Surveys & Analytical Services Ltd | Professional & scientific | 2024 |
| Essex Blinds Direct Ltd | Manufacturing | 2017 |
| Essex Business Development Ltd | Administrative & support | 2020 |
| Essex Carers Support | Other services | 2011 |
| Essex Garden Buildings Limited | Construction | 2026 |
| Essex GAS Solutions Limited | Other services | 2015 |
| Essex Gourmet Limited | Wholesale & retail | 2023 |
| Essex Home Renovations Ltd | Construction | 2025 |
| Essex Law Limited | Professional & scientific | 2016 |
| Essex Leisure and Van Conversions Limited | Manufacturing | 2016 |
| Essex Logistics Ltd | Administrative & support | 2023 |
| Essex Manor Lettings Ltd | Hospitality | 2018 |
| Essex Power and Installations Ltd | Construction | 2026 |
| Essex Premier Plumbing Limited | Construction | 2015 |
| Essex Rail OP Ltd | Construction | 2019 |
| Essex Rentals Limited | Administrative & support | 2013 |
| Essex Retailer Ltd | Wholesale & retail | 2016 |
| Essex Services Group (Clacton) Ltd | Water & waste | 2025 |