| Essex Multi Services Limited | Construction | 2026 |
| Essex Muslim Centre Ltd | Education | 2023 |
| Essex NO1 Recycling Limited | Water & waste | 2024 |
| Essex Noodle Ltd | Hospitality | 2023 |
| Essex Nursing Homes Limited | Real estate | 1978 |
| Essex OIL and GAS Ltd | Construction | 2020 |
| Essex Pain Management Ltd | Health & social care | 2012 |
| Essex Pain Services Limited | Health & social care | 2007 |
| Essex Painting & Decorating Services Limited | Construction | 2017 |
| Essex Parking Sensors Ltd | Wholesale & retail | 2024 |
| Essex Petsitters Limited | Other services | 2012 |
| Essex Police Special Constabulary Charitable Fund Limited | Other services | 2006 |
| Essex Powder Coating Ltd | Manufacturing | 2026 |
| Essex Precast Limited | Construction | 2023 |
| Essex Prestige Doors Ltd | Construction | 2020 |
| Essex Properties Limited | Real estate | 2011 |
| Essex Properties Professionals Ltd | Real estate | 2008 |
| Essex Property and Investments Ltd | Construction | 2017 |
| Essex Property Lettings Ltd | Real estate | 2020 |
| Essex Quantity Surveying Limited | Professional & scientific | 2025 |
| Essex Racial Equality Unit Ltd | Public administration | 2020 |
| Essex Radiators Limited | Real estate | 1943 |
| Essex Refrigeration Ltd | Manufacturing | 2013 |
| Essex Renal Care Limited | Health & social care | 2011 |
| Essex Repairs and Maintenance Ltd | Construction | 2026 |
| Essex Respite & Care Association | Health & social care | 1995 |
| Essex Restoration Limited | Administrative & support | 2013 |
| Essex Road Property Developments Limited | Construction | 2019 |
| Essex Scaffolding Supplies Ltd | Wholesale & retail | 2022 |
| Essex Second Hand Car Parts & Recycling Limited | Wholesale & retail | 2025 |
| Essex Smart Repairs Limited | Wholesale & retail | 2002 |
| Essex Spirits Company Ltd | Manufacturing | 2020 |
| Essex Sports Massage Limited | Arts & recreation | 2023 |
| Essex Stays Limited | Real estate | 2019 |
| Essex Stretch Academy Limited | Arts & recreation | 2014 |
| Essex Symphony Orchestra Productions Limited | Arts & recreation | 2022 |
| Essex Tackle Ltd | Wholesale & retail | 2018 |
| Essex Tech Limited | Wholesale & retail | 2017 |
| Essex Technologies Limited | Information & communication | 2023 |
| Essex Tourer Services Limited | Manufacturing | 2021 |
| Essex Valley Ltd | Hospitality | 2025 |
| Essex Van Centre Limited | Administrative & support | 2024 |
| Essex Van Hire Ltd | Administrative & support | 2026 |
| Essex Vegetables&Groceries Ltd | Wholesale & retail | 2022 |
| Essex Visual Technologies Ltd | Construction | 2021 |
| Essex Waterways Limited | Arts & recreation | 2005 |
| Essex Waterways Navigation Trust | Arts & recreation | 2024 |
| Essex Web Design Studio Ltd | Professional & scientific | 2016 |
| Essex Wheels & Engineering Ltd | Manufacturing | 2008 |
| Essex Window Design Limited | Construction | 2012 |
| Essex Youthbuild Ltd | Education | 2008 |
| Essexeqc Ltd | Construction | 2024 |
| Esteam Cleaning Services Limited | Administrative & support | 2013 |
| Esteemed Real Estate Ltd | Real estate | 2021 |
| Ester Wines Limited | Wholesale & retail | 2014 |
| Estuary Property Maintenance Limited | Construction | 2013 |
| ET Business Support Services Ltd | Administrative & support | 2019 |
| ET Management Ltd. | Administrative & support | 2003 |
| ET Marine Limited | Extraterritorial | 2012 |
| Eternal Bloom Florist Limited | Wholesale & retail | 2007 |
| Eternal Flooring Limited | Construction | 2011 |
| Ethereal Pro Limited | Professional & scientific | 2024 |
| Ethicacoffeecompany Ltd | Manufacturing | 2021 |
| Ethical Energy Offsetters Limited | Extraterritorial | 2012 |
| Ethnoz Ltd | Wholesale & retail | 2022 |
| Ethos Care Providers Limited | Administrative & support | 2021 |
| Ethos Nursing Limited | Professional & scientific | 2015 |
| Etone Powder Coating Limited | Manufacturing | 2014 |
| ETS Investment Limited | Information & communication | 2018 |
| Ettevroc Ltd | Wholesale & retail | 2018 |
| Ettridge Farm Limited | Agriculture & fishing | 1956 |
| Ettridge Ltd | Information & communication | 2025 |
| Eunuel Resources Ltd | Health & social care | 2023 |
| Eureka Sunclub Ltd | Arts & recreation | 2019 |
| Euro Logistics Express Ltd | Transport & logistics | 2016 |
| Eurobase Consultancy Limited | Extraterritorial | 1993 |
| Eurobase Group Limited | Extraterritorial | 2001 |
| Eurobase International Limited | Extraterritorial | 1991 |
| Eurobase Limited | Extraterritorial | 2008 |
| Eurobase Systems Limited | Information & communication | 1988 |
| Euroloos Limited | Administrative & support | 2003 |
| Euromix Deli Limited | Wholesale & retail | 2025 |
| Europa Park LLP | | 2017 |
| Europawire Ltd | Information & communication | 2013 |
| Europe Muslim Association | Other services | 2011 |
| European Alarms & Security Systems Limited | Administrative & support | 2007 |
| European Buddhist-Hanmi Association | Other services | 2010 |
| European Loyalty Association (ELA) Limited | Other services | 2024 |
| Europrooms Travel Company Ltd | Other services | 2016 |
| EV Applications Limited | Real estate | 2020 |
| EV Car Service Ltd | Wholesale & retail | 2024 |
| EV Electrical Essex Limited | Construction | 2005 |
| EV GG Limited | Other services | 2007 |
| EV Installers Essex Ltd | Construction | 2026 |
| EV Property Investments Ltd | Real estate | 2018 |
| EVA BEE Limited | Financial services | 2017 |
| EVA Mirzaei Limited | Real estate | 2025 |
| Evans Installations Ltd | Construction | 2024 |
| Evara Consulting Limited | Information & communication | 2024 |
| EVE Contractors Ltd | Construction | 2018 |