| Essex Rocks Promotions Ltd | Arts & recreation | 2023 |
| Essex Savings Limited | Financial services | 2023 |
| Essex Security Gates Limited | Construction | 2014 |
| Essex Special Schools Education Trust | Education | 2014 |
| Essex Sports Academy Ltd | Education | 2023 |
| Essex Stairs & Joinery Ltd | Construction | 2014 |
| Essex Student Lets Limited | Real estate | 2010 |
| Essex Theatre Arts Performance Limited | Arts & recreation | 2026 |
| Essex Timber Window Repairs Ltd | Construction | 2025 |
| Essex Toy Cave Limited | Wholesale & retail | 2026 |
| Essex Training Company Ltd | Education | 2021 |
| Essex Transport Training Ltd | Education | 2017 |
| Essex Urology Limited | Health & social care | 2004 |
| Essex Vehicle Charging Ltd | Energy | 2021 |
| Essex Waste & Skip Hire Ltd | Water & waste | 2017 |
| Essex Weightlifting Club Ltd | Arts & recreation | 2016 |
| Essex Wildlife Sales Limited | Wholesale & retail | 1990 |
| Essex Wildlife Trust Limited | Other services | 1959 |
| ESSEX12 Property Ltd | Real estate | 2023 |
| Essexelectronics Ltd | Wholesale & retail | 2025 |
| Essexkaftans Home and Clothing Store Ltd | Wholesale & retail | 2025 |
| Essexprophub Limited | Real estate | 2023 |
| Essteria House Ltd | Administrative & support | 2023 |
| Estates Management (Commercial & Residential) Limited | Real estate | 2011 |
| Este Properties Limited | Real estate | 2024 |
| Estellecakes’N’Confectionaries Limited | Manufacturing | 2025 |
| Esti-Mate(Uk) Ltd | Professional & scientific | 2026 |
| Estimate Coaching Limited | Administrative & support | 2018 |
| Estuary EC Contracts Ltd | Construction | 2022 |
| Estuary Estates Limited | Real estate | 2024 |
| Estuary Vision Architects Limited | Professional & scientific | 2023 |
| Esxresourcetech Ltd | Administrative & support | 2017 |
| Esya.Law Ltd | Professional & scientific | 2021 |
| Esyll Ltd | Administrative & support | 2026 |
| ETA Consulting Ltd | Health & social care | 2023 |
| ETC Communications Ltd | Professional & scientific | 2017 |
| Eternal Rock Properties Ltd | Real estate | 2022 |
| Etesia (Chelmsford) Management Company Limited | Households | 2005 |
| Ethereal Solutions Limited | Arts & recreation | 2022 |
| Etherstores Limited | Professional & scientific | 2003 |
| Ethica Care Services Ltd | Health & social care | 2014 |
| Ethica Source Limited | Wholesale & retail | 2019 |
| Ethical Ember Ltd | Wholesale & retail | 2025 |
| Ethos Interiors Group Limited | Financial services | 2022 |
| Ethyka Ltd | Manufacturing | 2018 |
| Etienne DA Cunha NAA Ltd | Construction | 2024 |
| Etiss Limited | Manufacturing | 2001 |
| Eton Developers Ltd | Real estate | 2024 |
| Eucherts Holdings Ltd | Real estate | 2021 |
| Euphorea Limited | Wholesale & retail | 2025 |
| Euphoria Digital Ltd | Wholesale & retail | 2019 |
| Euphoric Rain Ltd | Wholesale & retail | 2024 |
| Euricom UK Limited | Wholesale & retail | 2018 |
| Euro Car Keys Solutions Ltd | Wholesale & retail | 2025 |
| Euro Contracts Limited | Construction | 2015 |
| Euro Property Investment (UK) Limited | Real estate | 2011 |
| Euro Star Industries Limited | Wholesale & retail | 1995 |
| Euro Workspace Global Limited | Wholesale & retail | 2020 |
| Euro Workspace Limited | Manufacturing | 2011 |
| Euro Workspace Solutions Ltd | Extraterritorial | 2014 |
| Euro Workspace Systems Ltd | Extraterritorial | 2014 |
| Euro-Asian Private Limited | Real estate | 2017 |
| Eurofront Limited | Other services | 1999 |
| Eurojust Limited | Real estate | 2012 |
| Euroline Sales & Marketing (Properties) Limited | Real estate | 2000 |
| Euroline Sales & Marketing Limited | Financial services | 2000 |
| European Commodity Brokers Limited | Wholesale & retail | 2014 |
| European Health Commodities Limited | Administrative & support | 2025 |
| European Hospitality & Leisure Ltd | Hospitality | 2015 |
| European Medical Writers Association | Other services | 1998 |
| EV Excavations Limited | Construction | 2024 |
| EVA Technologies Limited | Information & communication | 2007 |
| Evaluation Builder Limited | Information & communication | 2024 |
| Evaluator Limited | Professional & scientific | 2004 |
| Evansbuild Limited | Construction | 2026 |
| Evansclear Limited | Professional & scientific | 2018 |
| Evenly Collective Ltd | Administrative & support | 2026 |
| Events Bars & Catering Limited | Hospitality | 2010 |
| Events Wellbeing Ltd | Arts & recreation | 2021 |
| Everclean (Clacton) Ltd | Administrative & support | 2020 |
| Everclean Essex Ltd | Administrative & support | 2019 |
| Everclean Ltd | Administrative & support | 2024 |
| Everest Computer Ltd | Manufacturing | 2026 |
| Everest Stay Ltd | Hospitality | 2026 |
| Everett Property Limited | Construction | 2025 |
| Everett Sky Ltd | Administrative & support | 2021 |
| Everflow Freight Ltd | Transport & logistics | 2023 |
| Everglade Homes Limited | Real estate | 1999 |
| Evergreen Cleaning Solutions Ltd | Administrative & support | 2022 |
| Evergreen Oasis Limited | Real estate | 2024 |
| Evergreen Office Supplies Limited | Administrative & support | 2001 |
| Everitt Court Limited | Real estate | 1989 |
| Everlasting Solutions Ltd | Wholesale & retail | 2023 |
| Everlyte Ltd | Extraterritorial | 2009 |
| Evernest Homes Ltd | Real estate | 2025 |
| Evertom Ltd | Financial services | 2021 |
| Everwell Ltd | Health & social care | 2024 |
| Every EV Solutions Ltd | Construction | 2025 |
| Everything Network Limited | Information & communication | 2022 |
| Evexa Ltd | Real estate | 2017 |