| Essex Construction and Builders Ltd | Construction | 2017 |
| Essex Convenience Store Ltd | Wholesale & retail | 2019 |
| Essex County Bowling Club Limited | Professional & scientific | 1920 |
| Essex County Care Limited | Health & social care | 2001 |
| Essex Demolition Contractors Limited | Construction | 1963 |
| Essex Dent Repairs Limited | Wholesale & retail | 2003 |
| Essex Designer Parties T/A EDP Ltd | Administrative & support | 2019 |
| Essex Detailing Limited | Other services | 2018 |
| Essex Development & Construction Limited | Construction | 1999 |
| Essex EPC Company Limited | Professional & scientific | 2007 |
| Essex Estate Management Limited | Real estate | 2002 |
| Essex Glass & Glazing Limited | Extraterritorial | 2000 |
| Essex Glass & Windscreens Limited | Manufacturing | 2000 |
| Essex Maintenance Services Ltd | Manufacturing | 2004 |
| Essex Marine & Leisure Limited | | 1990 |
| Essex Meats Limited | Real estate | 1996 |
| Essex Mobility Centre Limited | Administrative & support | 2001 |
| Essex Motor House E.M.H. Limited | Transport & logistics | 1988 |
| Essex Office Services (London) Ltd | Professional & scientific | 2004 |
| Essex Property Signs Ltd | Other services | 2005 |
| Essex Real Estates Limited | Real estate | 2006 |
| Essex Reclamation Limited | Manufacturing | 1974 |
| Essex Skips & Recycling Ltd | Water & waste | 2005 |
| Essex Turbochargers Limited | Professional & scientific | 1987 |
| Essex Utility Services Limited | Construction | 2007 |
| Essex Valeting Centre Ltd | Other services | 2013 |
| Essex Window Craft Ltd | Construction | 1999 |
| Essex Yacht Club Limited | Arts & recreation | 1930 |
| Essex Yacht Repairs Limited | Other services | 2007 |
| Established Search London Limited | Administrative & support | 2026 |
| Estate Wise Referral Limited | Wholesale & retail | 2025 |
| Estuary Plant Limited | Construction | 2003 |
| Estuary Signs Limited | Professional & scientific | 2019 |
| ET Landnet Limited | Professional & scientific | 2007 |
| Ethmul Ltd | Wholesale & retail | 2026 |
| Euphoria Entertainment Ltd | Professional & scientific | 2006 |
| Euro Technical Services Limited | Manufacturing | 2024 |
| Euro Vehicle Engineers Ltd | Wholesale & retail | 2003 |
| Euro-Afrique Trading Limited | Wholesale & retail | 2006 |
| Eurobase People Limited | Extraterritorial | 2000 |
| Eurobasic Limited | Extraterritorial | 2006 |
| Eurocrown Enterprises Limited | Real estate | 1994 |
| Eurodent Limited | Extraterritorial | 2001 |
| Euromine Global Ltd | Wholesale & retail | 2018 |
| Europa Industrial Roofing Services Limited | | 1977 |
| Europa Satnav Ltd | Wholesale & retail | 2010 |
| European Beverages Ltd | Wholesale & retail | 1999 |
| European Families Ltd | Information & communication | 2026 |
| European Link Ltd | Professional & scientific | 2025 |
| Eurorose Properties Limited | Real estate | 1995 |
| Evans & Shea Group Limited | Professional & scientific | 1980 |
| Evaz Limited | Real estate | 2017 |
| Evelution Services Limited | Water & waste | 2024 |
| Evelyn Gooding Associates Ltd | Real estate | 2024 |
| Events Unlimited Ltd | Professional & scientific | 2015 |
| Evercare Property Solutions Ltd | Construction | 2024 |
| Everest Leather Wear Limited | Wholesale & retail | 1987 |
| Everest Services Ltd | Administrative & support | 2007 |
| Eversden Economics Limited | Administrative & support | 2006 |
| Everstone Property 1 Limited | Real estate | 2022 |
| Eversure Charged Limited | Manufacturing | 2021 |
| Everyday Legacy Project Ltd | Information & communication | 2025 |
| Evezora Limited | Manufacturing | 2025 |
| Evidence Services Ltd | Transport & logistics | 2019 |
| Evigol Limited | Construction | 2017 |
| EVO Decorating Services Ltd | Construction | 2007 |
| Evolution Foundry Limited | Manufacturing | 2005 |
| Evorzonha Ltd | Wholesale & retail | 2026 |
| EVS Europe Limited | Administrative & support | 2004 |
| Ewanda Limited | Real estate | 2024 |
| Excel Academy Tutors Ltd | Education | 2026 |
| Excell Mechanical Services Limited | | 1973 |
| Excellently Done Properties Limited | Real estate | 2023 |
| Exclusive Driving School Ltd | Other services | 2010 |
| Exela Mart Ltd | Wholesale & retail | 2025 |
| Exeter Property Developments Limited | Real estate | 2007 |
| Exeview Limited | Financial services | 2006 |
| Expandus Ltd | Wholesale & retail | 2025 |
| Experience Security Ltd | Administrative & support | 2026 |
| Expert Busines Solutions Ltd | Wholesale & retail | 2025 |
| Expert Electrical & Heating Limited | Construction | 2007 |
| Expoprint Limited | Professional & scientific | 1989 |
| Export Movement Services Limited | Transport & logistics | 2000 |
| Expotel Limited | Wholesale & retail | 1991 |
| Express BD Ltd | Transport & logistics | 2020 |
| Expressmart Stores Ltd | Wholesale & retail | 2024 |
| Extinction Ltd | Administrative & support | 2025 |
| Exton Fire Safety UK Limited | Professional & scientific | 2007 |
| Extreme Miles Ltd | Information & communication | 2025 |
| EY Associates Limited | Professional & scientific | 2003 |
| Eyano Medical & Ancillary Care Services Ltd | Health & social care | 2019 |
| EYE Interaction Ltd | Professional & scientific | 2025 |
| Eyecrown Consulting Ltd | Information & communication | 2011 |
| Eyedeal Vision (Wholesale) Limited | Health & social care | 1990 |
| Eyedearz Design Limited | Information & communication | 2000 |
| EZ Deals Limited | Wholesale & retail | 2026 |
| Ezeyan Ltd | Professional & scientific | 2025 |
| F & D Construction Ltd | Construction | 2021 |
| F a Commodities Ltd | Wholesale & retail | 2003 |
| F C Moore Limited | Real estate | 1936 |