| Elite International Consults Ltd | Information & communication | 2020 |
| Elite Management Agency Limited | Professional & scientific | 2011 |
| Elite Services (Essex) Limited | Construction | 2016 |
| Elitegroupconsulting Limited | Professional & scientific | 2014 |
| Elizabeth Charles (London) Limited | Wholesale & retail | 2012 |
| Ella Bella's Boutique Ltd | Wholesale & retail | 2025 |
| Ellery Contracts Ltd | Construction | 2019 |
| Ellie's Finishing Touches Limited | Wholesale & retail | 2016 |
| Elliott Home Improvements Ltd | Construction | 2019 |
| Eloquence Media Management Ltd | Professional & scientific | 2024 |
| Elrose Windows Limited | Wholesale & retail | 2023 |
| Elvaquero Limited | Hospitality | 2023 |
| Elzora Limited | Wholesale & retail | 2025 |
| Embedded Systems Engineering Limited | Professional & scientific | 2023 |
| Ember Properties Limited | Professional & scientific | 2009 |
| Emberson Handyman Services Ltd | Administrative & support | 2026 |
| Emblem Business Group Ltd | Professional & scientific | 2015 |
| Emblem Wickford LLP | | 2009 |
| Emcd Limited | Professional & scientific | 2024 |
| Emerald Properties (Essex) Ltd | Real estate | 2020 |
| Emerge Marketing Limited | Professional & scientific | 2014 |
| Emerge Talent Ltd | Administrative & support | 2024 |
| Emergency Production Music Limited | Information & communication | 2009 |
| EMI Management Limited | Administrative & support | 2015 |
| Emily Design Studio Ltd | Professional & scientific | 2024 |
| Emily Margaret Ltd | Manufacturing | 2019 |
| Emily Rose Beauty Ltd | Other services | 2022 |
| Emma Wilkinson Limited | Information & communication | 2022 |
| Empire Pest Control Limited | Other services | 2007 |
| EMS Learning Ltd | Education | 2019 |
| EMT Interiors Limited | Construction | 2015 |
| END Point Assessors Limited | Other services | 2020 |
| Endgame Business Consulting Ltd | Professional & scientific | 2022 |
| Energent Motor Systems Limited | Construction | 2024 |
| Energy Marketing Services Limited | Other services | 2024 |
| Energy Physiotherapy Ltd | Health & social care | 2024 |
| Engine Rebuild Ltd | Wholesale & retail | 2025 |
| Englewood Homes Ltd | Extraterritorial | 2021 |
| English Voice Over Limited | Information & communication | 2009 |
| Enhance Medical Ltd | Health & social care | 2010 |
| Enterprise Mgmt Ltd | Professional & scientific | 2018 |
| Envirolec UK Limited | Construction | 2009 |
| Enviromental Control Services Limited | Professional & scientific | 2017 |
| Environmental Mould Solutions Limited | Professional & scientific | 2023 |
| Enviroteam Ltd | Other services | 2023 |
| Epay Limited | Information & communication | 1999 |
| Epic-X Action Sports Ltd | Education | 2026 |
| EPK Property Refurbishment Ltd | Manufacturing | 2020 |
| Epsilon Project Controls Ltd | Construction | 2025 |
| Equipment Installation Engineers Limited | Construction | 2012 |
| Equities Ltd | Real estate | 2019 |
| Equity Release Brokers Limited | Financial services | 2019 |
| ERL Financial Limited | Financial services | 2010 |
| ERL Financial Services Ltd. | Financial services | 2002 |
| Ernest MAY Limited | Administrative & support | 2022 |
| ES Carpentry Ltd | Construction | 2014 |
| ES Vedra Art Limited | Professional & scientific | 2022 |
| Escape Essex Limited | Information & communication | 2018 |
| ESH Physio Ltd | Health & social care | 2025 |
| Esph Healthcare Limited | Health & social care | 2011 |
| Esph Llfg Limited | Arts & recreation | 2013 |
| Essence Dermatology Limited | Health & social care | 2021 |
| Essex Beds (Hadleigh) Limited | Wholesale & retail | 2012 |
| Essex Beds (Maldon) Limited | Wholesale & retail | 2012 |
| Essex Beds (Southend) Limited | Wholesale & retail | 2017 |
| Essex Beds (Wickford) Limited | Wholesale & retail | 2020 |
| Essex Bridal Company Limited | Wholesale & retail | 2025 |
| Essex Business & Leisure Limited | Professional & scientific | 2010 |
| Essex Car Breakers Ltd | Wholesale & retail | 2025 |
| Essex Coin Auctions Ltd | Wholesale & retail | 2022 |
| Essex County Home Improvements Limited | Construction | 2020 |
| Essex Dental Locums Limited | Health & social care | 2022 |
| Essex Drone Services Ltd | Information & communication | 2026 |
| Essex Electrical & Mechanical Ltd | Construction | 2023 |
| Essex Electrical and Cooling Ltd | Construction | 2019 |
| Essex Elite Boilers Limited | Construction | 2024 |
| Essex Farm Services Limited | Agriculture & fishing | 2008 |
| Essex Finest Foods Ltd | Wholesale & retail | 2022 |
| Essex Fire & Electrical Ltd | Construction | 2015 |
| Essex Games Ltd | Arts & recreation | 2023 |
| Essex Gardens Trust | Other services | 1996 |
| Essex Heating Experts Limited | Construction | 2024 |
| Essex Holdings Ltd | Financial services | 2018 |
| Essex MAX Store Ltd | Wholesale & retail | 2025 |
| Essex Olympian Football League Limited | Professional & scientific | 2016 |
| Essex Pages Limited | Professional & scientific | 2011 |
| Essex Plumbing and Maintenance Ltd | Construction | 2025 |
| Essex Plumbing Services Ltd | Construction | 2025 |
| Essex Protect Limited | Administrative & support | 2021 |
| Essex Refurbishment & Decorating Services Ltd | Construction | 2007 |
| Essex Roofing & Building Ltd | Construction | 2026 |
| Essex Schools Sports Coaching Ltd | Education | 2019 |
| Essex Secretarial Limited | Administrative & support | 2006 |
| Essex Skips Ltd | Water & waste | 2007 |
| Essex Style for Kids Limited | Wholesale & retail | 2015 |
| Essex Tasty Food Ltd | Agriculture & fishing | 2025 |
| Essex Vehicle Recovery & Transport Limited | Transport & logistics | 2025 |
| Essex Worktops Ltd | Wholesale & retail | 2025 |
| Estuary Finance & Advisory Limited | Administrative & support | 2017 |
| Estuary Restaurants Limited | Hospitality | 2006 |