| EON Digital Ltd | Information & communication | 2021 |
| EON Technologies Limited | Information & communication | 1996 |
| EP Brands Limited | Wholesale & retail | 2016 |
| Epco Property Management Limited | Extraterritorial | 2016 |
| Epping Montessori Nursery Ltd | Health & social care | 2022 |
| Epston Limited | Construction | 2011 |
| Equipmentxchange Limited | Administrative & support | 2025 |
| Equity Bricks Ltd | Real estate | 2022 |
| ER Property Ltd | Real estate | 2021 |
| ERA Solicitors Ltd | Professional & scientific | 2026 |
| Eradea Ltd | Construction | 2024 |
| Erin Leisure Limited | Hospitality | 2017 |
| Eritech Consultancy Limited | Professional & scientific | 2017 |
| Ernest Hathaway Associates Limited | Administrative & support | 2016 |
| Erobos Software and Systems Ltd | Information & communication | 2015 |
| ERV Building Ltd | Construction | 2026 |
| ES Surgery Limited | Health & social care | 2025 |
| Esess Ltd | Wholesale & retail | 2021 |
| Esiew Ltd | Real estate | 2024 |
| Esiex Limited | Construction | 2024 |
| Eslem Limited | Hospitality | 2025 |
| ESO International Limited | Wholesale & retail | 2019 |
| Esquire Management Limited | Administrative & support | 2005 |
| ESS Assets LLP | | 2024 |
| Essex Advertising Services Ltd | Professional & scientific | 2019 |
| Essex Auto Components Limited | Wholesale & retail | 2007 |
| Essex Banners Limited | Manufacturing | 2019 |
| Essex Barns Limited | Real estate | 2022 |
| Essex Bounce House Ltd | Arts & recreation | 2026 |
| Essex Consults Ltd Ltd | Information & communication | 2025 |
| Essex Drums Ltd | Water & waste | 2001 |
| Essex Elite Electrical Limited | Construction | 2024 |
| Essex Flower Bar Ltd | Wholesale & retail | 2024 |
| Essex Food and Supplies Limited | Hospitality | 2023 |
| Essex Glam Nails and Beauty Ltd | Administrative & support | 2018 |
| Essex Home Heating Ltd | Construction | 2022 |
| Essex Horticulture Wholesale Limited | Wholesale & retail | 2014 |
| Essex Maintenance Team Limited | Households | 2025 |
| Essex Medicare LLP | | 2010 |
| Essex Packaging Supplies Limited | Wholesale & retail | 1987 |
| Essex Photo Booth Hire Limited | Arts & recreation | 2016 |
| Essex Real Estate Group Ltd | Real estate | 2021 |
| Essex Reformer Co Ltd | Arts & recreation | 2026 |
| Essex RG Contracts Limited | Construction | 2018 |
| Essex Ringside Boxing Club Limited | Arts & recreation | 2021 |
| Essex Secure Assets Limited | Financial services | 2019 |
| Essex Service Centre Ltd | Wholesale & retail | 2024 |
| Essex Singh Properties Limited | Real estate | 2024 |
| Essex Taxi Centre Limited | Administrative & support | 2017 |
| Essex Tours Limited | Transport & logistics | 2023 |
| Essex Transport Group Limited | Transport & logistics | 2024 |
| Essex Wholesale Ltd | Wholesale & retail | 2025 |
| Essexlash Limited | Other services | 2018 |
| Essie Homes Limited | Administrative & support | 2015 |
| Esteem Developments Ltd | Construction | 2020 |
| Esteem Group Ltd | Construction | 2019 |
| ESX Construction Services Ltd | Construction | 2019 |
| Etienne Deysel Ltd | Health & social care | 2005 |
| Etmon Limited | Construction | 2024 |
| Eton Capital Holdings Limited | Real estate | 2026 |
| Euro Forktrucks Ltd | Professional & scientific | 2025 |
| Eurohaat Ltd | Professional & scientific | 2018 |
| Europeindia Limited | Extraterritorial | 2011 |
| Euroqos Ltd | Other services | 2017 |
| Euroqos SPV1 Ltd | Real estate | 2017 |
| EV Build Ltd | Construction | 2018 |
| EVA Prop Limited | Real estate | 2024 |
| Evantis Technology Ltd | Administrative & support | 2022 |
| Eveline Entertainment Ltd | Other services | 2025 |
| Evelon Investment Ltd | Real estate | 2026 |
| Evendor UK Ltd | Wholesale & retail | 2017 |
| Event Horizon Group Ltd | Hospitality | 2025 |
| Event Taxis Limited | Transport & logistics | 2023 |
| Everestar Limited | Construction | 2015 |
| Evergreen Management Group Ltd | Wholesale & retail | 2025 |
| Evershine Signs & Awnings Ltd | Administrative & support | 2022 |
| Everstead Management Limited | Households | 2026 |
| Every Player Matters Ltd | Education | 2023 |
| Evesham Place Limited | Health & social care | 2013 |
| Evin Gents Barbers Ltd | Other services | 2019 |
| Evolution Loft & Extension Ltd | Construction | 2024 |
| Evorad Limited | Health & social care | 2021 |
| Evry Limited | Professional & scientific | 2010 |
| Ewgs Holdings Ltd | Real estate | 2024 |
| Ewgs Properties Ltd | Real estate | 2024 |
| EWN Metal Roofing Specialists Limited | Construction | 2023 |
| Excalibur Construction Limited | Construction | 2011 |
| Excel Physiotherapy and Acupuncture Limited | Other services | 2013 |
| Excel Safety Consultants Limited | Professional & scientific | 2015 |
| Excelledent Limited | Health & social care | 2007 |
| Exclusive Joinery Ltd | Manufacturing | 2025 |
| Execudent (Holborn) Limited | Extraterritorial | 2008 |
| Execudent (Salisbury) Limited | Extraterritorial | 2008 |
| Execudent Limited | Health & social care | 2008 |
| Executive Health Check Limited | Health & social care | 2023 |
| Exerginc Ltd | Other services | 2024 |
| Exerscience Limited | Health & social care | 2007 |
| Exht Ltd | Wholesale & retail | 2025 |
| Eximius Sailing Limited | Arts & recreation | 2019 |
| Eximus Air Ltd | Construction | 2012 |