| East Anglian Mechanical Limited | Construction | 2025 |
| East County Electrical Ltd | Construction | 2022 |
| Easter Heating Ltd | Construction | 2026 |
| Eastern Elite Electrical Limited | Construction | 2022 |
| Easy PPL Limited | Education | 2023 |
| EAT Natural Limited | Manufacturing | 2020 |
| Eaton Engineering Limited | Manufacturing | 2004 |
| ECE Catering Equipment Limited | Professional & scientific | 2021 |
| Ecem Beliz Ltd | Hospitality | 2022 |
| Eco Resin Ltd | Extraterritorial | 2025 |
| Eco-Hydronics Ltd | Construction | 2019 |
| Ecolnes Refillery Ltd | Wholesale & retail | 2021 |
| Ecuagenera UK Limited | Wholesale & retail | 2022 |
| Ecurie Management Ltd | Wholesale & retail | 2012 |
| Eden Print Limited | Manufacturing | 2024 |
| EE Paving Solutions Ltd | Administrative & support | 2024 |
| EF - EX Logistics Limited | Transport & logistics | 2011 |
| Eichbaum Consult Limited | Administrative & support | 2013 |
| Eider Construction Ltd | Construction | 2019 |
| EK Halstead Ltd | Hospitality | 2025 |
| Elan Care Services Limited | Health & social care | 2017 |
| Elan Care Whitethorn Limited | Health & social care | 2017 |
| Element Info Tech Limited | Extraterritorial | 2009 |
| Elite Advanced Physio Ltd | Health & social care | 2016 |
| Elite Mechanical Engineering Services Limited | Manufacturing | 2022 |
| Elite Spray UK Limited | Construction | 2019 |
| Eliva Limited | Financial services | 2022 |
| Elizabeth Lockhart Way Management Company Limited | Construction | 2022 |
| Ellis INK Ltd | Health & social care | 2025 |
| Ellis Media and Events Ltd | Information & communication | 2024 |
| Elms Electrical Services Limited | Construction | 2014 |
| Elmwood Joinery (East Anglia) Limited | Construction | 2003 |
| Elsey & Co Ltd. | Construction | 2014 |
| Elstan Driling Services Ltd | Construction | 2026 |
| Em's Laundry Limited | Other services | 2009 |
| Emerging Butterflies Limited | Health & social care | 2015 |
| Emoi Creative Ltd | Information & communication | 2026 |
| Empire Hand Car Wash Ltd | Other services | 2019 |
| Enbody Coaching Ltd | Education | 2023 |
| Encore XL Limited | Administrative & support | 2020 |
| END Point Assessment Ltd | Education | 2015 |
| Ending Myopia Limited | Professional & scientific | 2016 |
| Enjoy Companies Limited | Information & communication | 2004 |
| Entangled Creative Ltd | Professional & scientific | 2025 |
| Enterprises Auric Limited | Real estate | 2022 |
| ENW Pneumatic Services LLP | | 2008 |
| EOE Property Ltd | Real estate | 2024 |
| Equine Gold Ltd | Agriculture & fishing | 2019 |
| Equitable 1961 Limited | Extraterritorial | 2014 |
| Eric Wilson & Co. Ltd | Administrative & support | 1997 |
| Ernest Nation Ltd | Information & communication | 2011 |
| Eske Limited | Administrative & support | 2005 |
| ESO Personalise Limited | Administrative & support | 2010 |
| Essex & Suffolk OIL Boilers Limited | Construction | 2017 |
| Essex Accountants Limited | Professional & scientific | 2012 |
| Essex and Suffolk Carpentry Limited | Construction | 2016 |
| Essex and Suffolk Decorating Limited | Construction | 2016 |
| Essex and Suffolk Heating Limited | Construction | 2019 |
| Essex and Suffolk Roofing Ltd | Construction | 2019 |
| Essex Care Products Limited | Wholesale & retail | 2013 |
| Essex Freeholds Limited | Extraterritorial | 2017 |
| Essex Metal Fabrications | | 1986 |
| Essex Projects Consultancy Ltd | Information & communication | 2018 |
| Essex Repair Specialists Limited | Construction | 2023 |
| Essex Safety Services Ltd | Health & social care | 2015 |
| Essex Tattoo Removal Ltd | Health & social care | 2016 |
| Estech Digital Limited | Information & communication | 2018 |
| Estwal Ltd | Administrative & support | 2017 |
| ESX Ventures Limited | Households | 2022 |
| Ethos Sports Participation Limited | Education | 2026 |
| Euphoria Autos Limited | Wholesale & retail | 2020 |
| Evergreen Community Services CIC | Health & social care | 2025 |
| Everyday Tissue Ltd | Manufacturing | 2025 |
| Everything Musical Ltd | Wholesale & retail | 2010 |
| Evil EGG Software Ltd | Information & communication | 2017 |
| Evrim Ltd | Hospitality | 2021 |
| EWS Projects Limited | Construction | 2012 |
| Excel Brickwork (UK) Ltd | Construction | 2006 |
| Excel Brickwork Ltd | Construction | 1999 |
| Exceptional Electrical Limited | Construction | 2016 |
| Exceptional Ideas Group Ltd | Financial services | 2025 |
| Exceptional Ideas Ltd | Education | 2007 |
| Exclusive Gardens Limited | Wholesale & retail | 2010 |
| Expert Sprayfoam Removal Limited | Construction | 2025 |
| Extensions by ELL Limited | Other services | 2021 |
| External Wall Services (Essex) Limited | Construction | 2003 |
| F & K Consultancy Ltd | Construction | 2025 |
| F & M Bennett Removals Ltd | Transport & logistics | 2022 |
| F J Jobson & Daughters Limited | Professional & scientific | 2012 |
| F2M Limited | Hospitality | 2001 |
| Fabio Aliano DE Paula Ltd | Professional & scientific | 2018 |
| Factory Lane Autos Limited | Wholesale & retail | 1986 |
| Fairking Limited | Agriculture & fishing | 1985 |
| Fairloan Limited | Financial services | 2012 |
| Fairlocks Pool Products Limited | Wholesale & retail | 2006 |
| Family Mediation for YOU Ltd | Health & social care | 2026 |
| Farch Vehicle Logistics Ltd | Transport & logistics | 2026 |
| Farch Vehicle Solutions Ltd | Transport & logistics | 2026 |
| FDA Fire Solutions Limited | Construction | 2025 |
| Fenmans Gardens (20 to 42 (Even)) RTM Company Limited | Real estate | 2022 |