| Encore Environment Project Divert Limited | Administrative & support | 2025 |
| Encore Environmental Consulting Limited | Water & waste | 2023 |
| Endless Mind and Soul Therapy Ltd | Health & social care | 2021 |
| Energy Efficient Systems Limited | Real estate | 2008 |
| Engagepro Solutions Ltd | Professional & scientific | 2024 |
| Engenuiti Limited | Professional & scientific | 2009 |
| Engineer Pro Ltd | Administrative & support | 2014 |
| Enterprises of E Smada Ltd | Real estate | 2023 |
| Enviro Contracts Ltd | Construction | 2023 |
| EOS Lighting Solutions Ltd | Manufacturing | 2018 |
| EP Consultancy (Essex) Limited | Professional & scientific | 2011 |
| Equestrian Facility Services Limited | Arts & recreation | 2014 |
| Equii-Est Ltd | Wholesale & retail | 2020 |
| Equip Property Maintenance Ltd | Construction | 2019 |
| Equipatech Ltd | Administrative & support | 2020 |
| Equistates Investments Limited | Real estate | 2000 |
| Equisupps Ltd | Wholesale & retail | 2022 |
| Erin Mcloughlin Limited | Manufacturing | 2020 |
| Ermis Beauty Ltd | Health & social care | 2017 |
| Ernest Ltd | Construction | 2019 |
| Escala Academy Limited | Professional & scientific | 2015 |
| Escher Media Limited | Information & communication | 2004 |
| Esperanto Limited | Other services | 2001 |
| Essex & South East Security Ltd | Administrative & support | 2019 |
| Essex 4X4 Ltd | Wholesale & retail | 2010 |
| Essex Aesthetic Clinic Ltd | Health & social care | 2021 |
| Essex Air Conditioning & Refrigeration Limited | Professional & scientific | 2018 |
| Essex Air Conditioning & Refrigeration Services Limited | Energy | 2014 |
| Essex Bailiff Services Ltd | Administrative & support | 2020 |
| Essex Boilers Ltd | Construction | 2024 |
| Essex Building and Developments Limited | Construction | 2026 |
| Essex Car Servicing Ltd | Wholesale & retail | 2024 |
| Essex Car Valet Ltd | Other services | 2019 |
| Essex Carpentry & Maintenance Limited | Construction | 2015 |
| Essex Commercial Heating Limited | Construction | 2018 |
| Essex County Plumbing & Heating Ltd | Construction | 2021 |
| Essex County Skips Ltd | Water & waste | 2005 |
| Essex Detailing Products Ltd | Wholesale & retail | 2016 |
| Essex Drainage Facilities Ltd | Water & waste | 2019 |
| Essex Electrical 24/7 Limited | Construction | 2017 |
| Essex Elevators Ltd | Professional & scientific | 2020 |
| Essex Estuary Radio Ltd | Information & communication | 2026 |
| Essex Executive Cars Limited | Transport & logistics | 2019 |
| Essex Eyewear Limited | Wholesale & retail | 2021 |
| Essex Gaming BUS Limited | Other services | 2020 |
| Essex Glamping Limited | Hospitality | 2022 |
| Essex Gold Traders Limited | Wholesale & retail | 2012 |
| Essex Healthcare Limited | Real estate | 2012 |
| Essex Heating Engineers Limited | Construction | 2021 |
| Essex Hernia Centre Limited | Health & social care | 2005 |
| Essex Home Build Limited | Construction | 2015 |
| Essex Landscaping & Paving Limited | Construction | 2022 |
| Essex Lawncare Limited | Administrative & support | 2014 |
| Essex Mandatory Training Services Limited | Education | 2013 |
| Essex Menage Ltd | Construction | 2025 |
| Essex Mortgage and Protection Services Ltd | Financial services | 2015 |
| Essex Motorcycles Limited | Manufacturing | 2015 |
| Essex Oak Frame Limited | Construction | 2007 |
| Essex Pamper BUS Ltd | Arts & recreation | 2024 |
| Essex Pest Control Services Ltd | Other services | 2024 |
| Essex Planning Services Ltd | Professional & scientific | 2012 |
| Essex Property Consultants Limited | Administrative & support | 2018 |
| Essex Property Finders Ltd | Real estate | 2023 |
| Essex Property Management & Lettings Ltd | Real estate | 2013 |
| Essex Shutters and Blinds Ltd | Construction | 2026 |
| Essex Soft Play BUS Ltd | Arts & recreation | 2023 |
| Essex Sound & Light Limited | Construction | 2001 |
| Essex Stairlifts Ltd | Wholesale & retail | 2010 |
| Essex Transport Management Ltd | Professional & scientific | 2020 |
| Essex Wire Buyer Ltd | Wholesale & retail | 2024 |
| Essex Woodburners Ltd | Construction | 2014 |
| Essex Works Ltd | Construction | 2020 |
| Estuary Apartments Ltd | Households | 2023 |
| Estuary Bathrooms Ltd | Extraterritorial | 2024 |
| Estuary Construction Limited | Construction | 2012 |
| Estuary Festival CIC | Education | 2023 |
| Estuary Physio Ltd | Health & social care | 2020 |
| Ethos Publishing Consulting Ltd | Professional & scientific | 2025 |
| Eton Point Solutions Ltd | Professional & scientific | 2019 |
| Eurasian Procurement Limited | Wholesale & retail | 2019 |
| European Wire Buyer Ltd | Wholesale & retail | 2025 |
| Evelution Limited | Manufacturing | 2016 |
| Ever Consulting Limited | Professional & scientific | 2023 |
| Ever-Route Logistic Ltd | Transport & logistics | 2026 |
| Everfast Transport Limited | Transport & logistics | 2003 |
| Everise Fashion UK Ltd | Manufacturing | 2013 |
| Everix Ltd | Construction | 2020 |
| EVO Developing UK Limited | Construction | 2020 |
| Evoluskin Europe Ltd | Wholesale & retail | 2025 |
| Evolution Equipment (UK) Limited | Other services | 2009 |
| Evolution in Technology Limited | Information & communication | 2004 |
| Evolvia Consultancy Limited | Professional & scientific | 2025 |
| Ewood Consulting Ltd | Professional & scientific | 2009 |
| Ewood Properties Limited | Real estate | 2013 |
| Exactuspay Limited | Information & communication | 2024 |
| Excel U Ltd | Professional & scientific | 2022 |
| Excelsior Decorators Ltd | Construction | 2020 |
| Executive Suite Controls Design and Integration Limited | Professional & scientific | 2022 |
| Explore Coaching Limited | Other services | 2020 |
| Express Business Services Limited | Administrative & support | 2007 |