| Encea Transport Limited | Transport & logistics | 2025 |
| Ency Care Limited | Health & social care | 2020 |
| Encysystems Ltd | Transport & logistics | 2010 |
| END of Level Media Limited | Information & communication | 2018 |
| Endeavour Logistics Ltd | Transport & logistics | 2019 |
| Endeavour's Reach NO.1 Limited | Households | 2000 |
| Endeavour's Reach NO.2 Limited | Households | 2000 |
| Eneari Medical Consulting Limited | Health & social care | 2025 |
| Enfield Island Village Phase 2 (Block H) Management Company Limited | Households | 2001 |
| ENG Contractors Limited | Construction | 2023 |
| Engelbrecht Property Investment Ltd | Real estate | 2024 |
| Engineering & Commissioning Solutions Limited | Professional & scientific | 2017 |
| Englefield Management Limited | Households | 1970 |
| Enhance Investment Partners Limited | Wholesale & retail | 2013 |
| Enmex Construction Ltd | Construction | 2024 |
| Ennis Foods Ltd | Wholesale & retail | 2020 |
| Enolife Limited | Information & communication | 2019 |
| Enora Medical Ltd | Health & social care | 2024 |
| ENS Health Ltd | Health & social care | 2023 |
| Enterprise Lane Limited | Administrative & support | 2020 |
| Enterprise MOT Harlow Limited | Wholesale & retail | 2026 |
| Entire Engagement Services Ltd | Other services | 2018 |
| Enviro Decs Ltd | Construction | 2021 |
| Enviro-Tek Engineering Limited | Professional & scientific | 2017 |
| Enviro-Tek Recycling Ltd | Water & waste | 2006 |
| Enviro-Tek Rentals Limited | Water & waste | 2017 |
| Enviro-Tek Waste Management Limited | Water & waste | 2009 |
| Environment Management Services Limited | Professional & scientific | 2013 |
| Environmental Conservation Co-Operative Ltd. | Water & waste | 1995 |
| Envision Care Ltd | Health & social care | 2022 |
| Envisualed Limited | Information & communication | 2025 |
| Eonian Limited | Real estate | 2019 |
| Epetilimo Services Limited | Wholesale & retail | 2012 |
| Ephata Limited | Health & social care | 2023 |
| Ephoma Limited | Health & social care | 2023 |
| Ephphata Medical Services Ltd | Health & social care | 2019 |
| Epicmak Ltd | Professional & scientific | 2018 |
| Epping Auto Care Ltd | Wholesale & retail | 2023 |
| Epping Forest Construction Limited | Construction | 2012 |
| EPS Concierge Ltd | Wholesale & retail | 2023 |
| EPS Corporation Ltd | Construction | 2023 |
| Eptas Films Ltd | Information & communication | 2026 |
| Equal Quality Limited | Information & communication | 2014 |
| Equi-Hire Ltd | Administrative & support | 2022 |
| EQUINES4ALL Ltd | Agriculture & fishing | 2020 |
| Equipnomnom Ltd | Wholesale & retail | 2023 |
| Equity Squad Limited | Financial services | 2012 |
| Equuleus Limited | Real estate | 2012 |
| Ercon Limited | Construction | 2019 |
| Eremitly Ltd | Financial services | 2024 |
| Erka Foods Ltd | Wholesale & retail | 2023 |
| Ermans Kitchen Limited | Hospitality | 2019 |
| Ernest Real Estate Limited | Real estate | 2022 |
| Ernestkays Investment and Consult Limited | Financial services | 2024 |
| Ernestmichael Property Ltd | Real estate | 2025 |
| Errand Mate Services Limited | Wholesale & retail | 2026 |
| Ershaw Medicals Ltd | Health & social care | 2022 |
| Erudilicious Limited | Health & social care | 2024 |
| ES Consultancy Management Ltd | Professional & scientific | 2025 |
| ESA Midpoint Limited | Hospitality | 2019 |
| Esar United Limited | Hospitality | 2023 |
| ESG Management Ltd | Information & communication | 2015 |
| ESI Contracts Ltd | Construction | 2025 |
| Esograce Healthcare Limited | Health & social care | 2021 |
| Espro Engineering Limited | Professional & scientific | 2024 |
| Essence Delivery & Collection Ltd | Hospitality | 2018 |
| Essenciel Ltd | Wholesale & retail | 2023 |
| Essex Academy Limited | Education | 2012 |
| Essex and Herts Flooring Ltd | Construction | 2021 |
| Essex Auto Logistics Limited | Transport & logistics | 2018 |
| Essex Balloons and Events Company Limited | Other services | 2018 |
| Essex Cares Home Care Ltd | Health & social care | 2025 |
| Essex Cat Flap Fitters Ltd | Construction | 2025 |
| Essex Cleaning Contractors Limited | Administrative & support | 2026 |
| Essex Climate Control Ltd | Construction | 2019 |
| Essex Combat DEN Limited | Arts & recreation | 2025 |
| Essex Discount Furniture Limited | Manufacturing | 2011 |
| Essex Dolls Ltd | Wholesale & retail | 2022 |
| Essex Double Glazing Ltd | Construction | 2014 |
| Essex Foreign Exchange Ltd | Financial services | 2016 |
| Essex Girl Beauty Limited | Wholesale & retail | 2018 |
| Essex Grab Hire Limited | Construction | 1999 |
| Essex Heating & Plumbing Group Ltd | Construction | 2022 |
| Essex Loft Extensions Ltd | Construction | 2025 |
| Essex Metal Recycling Ltd | Water & waste | 2024 |
| Essex Motorsport Services (EMS) Limited | Wholesale & retail | 2016 |
| Essex Optics Limited | Financial services | 2017 |
| Essex Pizza and Pasta Limited | Hospitality | 2019 |
| Essex Plus Limited | Transport & logistics | 2024 |
| Essex PPE Ltd | Wholesale & retail | 2022 |
| Essex Senior Football League Limited | Arts & recreation | 2024 |
| Essex Skip Hire Ltd | Water & waste | 2007 |
| Essex Tool Supplies Limited | Wholesale & retail | 1980 |
| Essex Transport Compliance Ltd | Transport & logistics | 2024 |
| Essex Wheel Company Limited | Other services | 2015 |
| Essex Women's Health Physiotherapy Limited | Health & social care | 2024 |
| Esstoo Limited | Professional & scientific | 2007 |
| Estetican Ltd | Health & social care | 2020 |
| Esther & Daniel Ltd | Real estate | 2026 |
| Esthetica Clinic Limited | Health & social care | 2017 |