| Enterprise Adhesives Limited | Professional & scientific | 1990 |
| Enterprise B & B Ltd | Administrative & support | 2026 |
| Entire Cleaning Solutions Limited | Administrative & support | 2018 |
| Enver Lights UK Limited | Manufacturing | 2016 |
| Envio International Limited | Transport & logistics | 2009 |
| Environmental Group Holdings Limited | Financial services | 2022 |
| Environmental Group Limited | Financial services | 2016 |
| Environmental Tankers Limited | Water & waste | 2015 |
| Envirovan Limited | Transport & logistics | 2015 |
| Envision Scope Limited | Construction | 2012 |
| Envo Services Ltd | Construction | 2018 |
| EO Surveyors Ltd | Professional & scientific | 2021 |
| EPC Mechanical Ltd | Construction | 2024 |
| EPC Property Ltd | Real estate | 2020 |
| EPH & Sons Limited | Other services | 2023 |
| EPH Holding Limited | Real estate | 2023 |
| EPH Transport Limited | Transport & logistics | 2025 |
| Epic Bites Essex Ltd | Hospitality | 2025 |
| Epoch OMS Ltd | Information & communication | 2026 |
| Epsilon Motors Ltd | Wholesale & retail | 2024 |
| Equidale Business's Limited | Wholesale & retail | 2020 |
| Equip Business Limited | Education | 2019 |
| ERA Traders Ltd | Wholesale & retail | 2026 |
| ERB Care Ltd | Health & social care | 2024 |
| ERB Network Ltd | Financial services | 2023 |
| Eric Savill Consultancy Limited | Professional & scientific | 2016 |
| ERIC/ALPHA2025 Ltd | Construction | 2025 |
| Eridializa Ltd | Agriculture & fishing | 2025 |
| Eriera Skin Limited | Wholesale & retail | 2024 |
| Erika's Chimney Cake Ltd | Manufacturing | 2018 |
| Ernest Partners Ltd | Real estate | 2025 |
| Ernie Bennett Ltd | Households | 2023 |
| Ertem International Transport Limited | Wholesale & retail | 2009 |
| ES Facilities Limited | Real estate | 2009 |
| ES Profsol Ltd | Construction | 2025 |
| Esai Tasty Ltd | Hospitality | 2022 |
| Escape Beauty and Holistic Training Limited | Education | 2011 |
| Esdi Ltd | Construction | 2017 |
| Esglobal Services Limited | Other services | 2024 |
| Esha Global Ltd | Hospitality | 2026 |
| Esoftware Solution Ltd | Information & communication | 2022 |
| Esperanca Crewing Limited | Administrative & support | 2024 |
| Esplanade Investments Limited | Real estate | 2013 |
| Essential Estate Planning Limited | Professional & scientific | 2014 |
| Essential Fulfilment Limited | Wholesale & retail | 2023 |
| Essentials Vending Limited | Wholesale & retail | 2026 |
| Essentialsit Limited | Administrative & support | 2022 |
| Essex & Thames Education | Education | 2021 |
| Essex Allstar Roofing Ltd | Construction | 2016 |
| Essex Asbestos Surveys Limited | Construction | 2014 |
| Essex Asbestos Testing Limited | Water & waste | 2012 |
| Essex Autos Ltd | Wholesale & retail | 2015 |
| Essex Autoworks Ltd | Wholesale & retail | 2023 |
| Essex Bbqs Limited | Hospitality | 2018 |
| Essex Beauty & Aesthetics Limited | Other services | 2021 |
| Essex Bespoke Designs Limited | Other services | 2026 |
| Essex Bespoke Developments Ltd | Construction | 2024 |
| Essex Bicycles Ltd | Wholesale & retail | 2020 |
| Essex Boiler Care Limited | Construction | 2021 |
| Essex Bollards Ltd | Construction | 2019 |
| Essex Brickwork and Repointing Ltd | Construction | 2019 |
| Essex Build Limited | Construction | 2023 |
| Essex Builders & Decorators Ltd | Construction | 2014 |
| Essex Building Solution Ltd | Construction | 2025 |
| Essex Car & Commercial Ltd | Wholesale & retail | 2020 |
| Essex Car Buyer Limited | Wholesale & retail | 2016 |
| Essex Car Transport Ltd | Transport & logistics | 2009 |
| Essex Catering Supplies Limited | Wholesale & retail | 2002 |
| Essex Circus Academy Limited | Arts & recreation | 2025 |
| Essex Civils Limited | Other services | 2020 |
| Essex Commercial Repair Services Limited | Wholesale & retail | 2023 |
| Essex Communications Radio Hire Limited | Administrative & support | 2016 |
| Essex Community Development C.I.C. | Public administration | 2013 |
| Essex Crystal Services Ltd | Administrative & support | 2024 |
| Essex DAB Ltd | Information & communication | 2023 |
| Essex Electrical & Air Conditioning Ltd | Energy | 2019 |
| Essex Electrical & Mechanical Contracts Limited | Construction | 2002 |
| Essex Electrical Contractors Limited | Construction | 1994 |
| Essex Electrical Solutions Ltd | Construction | 2014 |
| Essex Electrical Wholesalers (Braintree) Ltd | Wholesale & retail | 2006 |
| Essex Epoxy Resin Limited | Construction | 2024 |
| Essex Fire and Security Ltd | Public administration | 2022 |
| Essex Fire Doors Ltd | Construction | 2025 |
| Essex Formwork Ltd | Construction | 2020 |
| Essex Fresh Meats Limited | Extraterritorial | 1989 |
| Essex Furniture Outlets Ltd | Wholesale & retail | 2014 |
| Essex Granite & Quartz Ltd | Manufacturing | 2024 |
| Essex Group Limited | Professional & scientific | 2003 |
| Essex Group U.K Limited | Construction | 2026 |
| Essex Home Contracts Ltd | Construction | 2024 |
| Essex Home Improvements Limited | Other services | 2015 |
| Essex Horse Transport Ltd | Transport & logistics | 2017 |
| Essex Housing Solutions Ltd | Construction | 2025 |
| Essex Kitchen's Limited | Construction | 2010 |
| Essex Laser and Skin Company Ltd | Other services | 2020 |
| Essex Lash Supplies Ltd | Wholesale & retail | 2024 |
| Essex Limited | Construction | 2017 |
| Essex Lofts & Extensions Ltd | Construction | 2015 |
| Essex Managment Property Ltd | Real estate | 2026 |
| Essex Marine Investments Limited | Real estate | 2008 |