| Essex Spray Painting Limited | Construction | 2025 |
| Essex Timepieces Ltd | Wholesale & retail | 2024 |
| Essex Trade Maintenance Company Ltd | Construction | 2000 |
| Essexsmokeshop Ltd | Wholesale & retail | 2026 |
| Eternal World Ltd | Wholesale & retail | 2021 |
| European Wide Ltd | Transport & logistics | 2025 |
| Europit 2019 Ltd | Wholesale & retail | 2019 |
| Europit Ford Road Ltd | Wholesale & retail | 2017 |
| Europit Tyres Ltd | Wholesale & retail | 2003 |
| EV Guarantee Limited | Information & communication | 2026 |
| EVA Restaurant Limited | Hospitality | 2026 |
| Evaris D Ltd | Transport & logistics | 2025 |
| Events & Joy Ltd | Administrative & support | 2024 |
| Everoak Group Ltd | Construction | 2026 |
| Evin NAZ Ltd | Hospitality | 2020 |
| EVJ Healthcare Ltd | Health & social care | 2019 |
| EWA & Amber Properties Ltd | Real estate | 2026 |
| Ewrk Martial Arts Club Ltd | Arts & recreation | 2021 |
| Excel Habitat TV Ltd | Real estate | 2025 |
| Exceltv Properties Limited | Real estate | 2021 |
| Explore Beyond Limited | Administrative & support | 2023 |
| Express Turbo Tyres Ltd | Wholesale & retail | 2024 |
| F Wilding Ltd | Construction | 2023 |
| F-Beat Music Limited | Extraterritorial | 1979 |
| FAB Developments (Essex) Ltd | Real estate | 2018 |
| Fair Contract Associates Limited | Information & communication | 2008 |
| Fair Contracts (UK) Limited | Professional & scientific | 2012 |
| Fair Contracts Limited | Extraterritorial | 2012 |
| Fairfax Motors Limited | Wholesale & retail | 1989 |
| Falcon Capital Markets UK Ltd | Professional & scientific | 2021 |
| Family Affect Ltd | Health & social care | 2014 |
| Faraday Motion Controls Limited | Wholesale & retail | 1998 |
| Fast Food Essex Ltd | Hospitality | 2026 |
| Fastask Solutions Limited | Professional & scientific | 2025 |
| Fatkoala Limited | Professional & scientific | 2010 |
| Fayden Homes Ltd | Construction | 2026 |
| FBD Ltd | Administrative & support | 1990 |
| FDH Electrical and Building Services Ltd | Construction | 2026 |
| FDH Hire Ltd | Administrative & support | 2026 |
| Fenella J. Miller Ltd | Arts & recreation | 2023 |
| FGH (Essex) Limited | Construction | 2012 |
| Fibreglass Grating Limited | Professional & scientific | 2008 |
| Fielding Engineering Limited | Manufacturing | 2003 |
| Finch Safety and Compliance Ltd | Administrative & support | 2022 |
| Finches Future Developments Ltd | Construction | 2025 |
| Find My Dog Asap Limited | Information & communication | 2025 |
| Firmounth UK Ltd | Real estate | 2023 |
| Firs Lake Park Ltd | Hospitality | 2018 |
| First Response First AID Training and Events Ltd | Public administration | 2020 |
| Fit Express Limited | Administrative & support | 2021 |
| Fitfusiontk Ltd | Health & social care | 2025 |
| FIX I.T. Essex Ltd | Information & communication | 2019 |
| Flame Prevention Ltd | Public administration | 2024 |
| Flappy Joe's Ltd | Hospitality | 2025 |
| Flare Security Services Ltd | Administrative & support | 2026 |
| Fleur Care and Support Ltd | Health & social care | 2018 |
| Flexible Cargo Services Ltd | Transport & logistics | 2017 |
| Flexible Digital Limited | Information & communication | 2019 |
| Florijn Care Limited | Health & social care | 2012 |
| Flow Installations Limited | Construction | 2025 |
| FM Colchester Trading Ltd | Hospitality | 2016 |
| Focus and Flourish Wellbeing Limited | Health & social care | 2025 |
| Fola Gold Jewellry Limited | Wholesale & retail | 2026 |
| Fontus Plumbing & Heating Ltd | Wholesale & retail | 2024 |
| Fool ME Once Ltd | Wholesale & retail | 2024 |
| Forces of Nature Ltd | Health & social care | 2012 |
| Fordwater Enterprises Limited | Manufacturing | 2026 |
| Forestry and Farm Services Limited | Agriculture & fishing | 2026 |
| Former Exchange Ltd | Hospitality | 2025 |
| Four Jets Limited | Administrative & support | 2025 |
| Framework Facilities Services Ltd | Construction | 2023 |
| Franco’S Italian Ltd | Hospitality | 2019 |
| François Calitz Atelier Ltd | Manufacturing | 2025 |
| Freckleton Homes Ltd | Real estate | 2019 |
| Fresh & Fruity Co. Ltd | Wholesale & retail | 2024 |
| Fresh Start Cleaners Essex Ltd | Administrative & support | 2026 |
| Fresko Events Ltd | Hospitality | 2026 |
| FRH Building Ltd | Construction | 2020 |
| Frinton Kitchens & Interiors Limited | Wholesale & retail | 2025 |
| Frinton MOT Centre Limited | Wholesale & retail | 2010 |
| Frinton Motors Limited | Real estate | 1967 |
| Frinton Plumbing and Heating Limited | Construction | 2020 |
| Frinton Summer Theatre | Arts & recreation | 2016 |
| Frost Property Investment Partners Limited | Real estate | 2025 |
| Funmi's Treasure Limited | Wholesale & retail | 2023 |
| Funnel Systems Ltd | Professional & scientific | 2026 |
| Furion Design Ltd | Professional & scientific | 2011 |
| Fusion Learn Ltd | Education | 2025 |
| Fusion Technical Support Ltd | Other services | 2008 |
| Future Financial Planning Limited | Financial services | 2014 |
| Future Power Technologies Limited | Manufacturing | 2013 |
| G&Lj Property Services Limited | Real estate | 2018 |
| G&Z Limited | Wholesale & retail | 2025 |
| G.C.S. Alarms Holdings Limited | Administrative & support | 2018 |
| G.D Training Services Ltd | Other services | 2021 |
| G.I.Fire Risk Assessments Ltd | Construction | 2025 |
| G.S.D Plumbing Services Limited | Construction | 2006 |
| G2 Security Ltd | Administrative & support | 2022 |
| Gairloch Care Limited | Administrative & support | 2008 |
| Gala Pizza Ltd | Hospitality | 2026 |