| Exclusive Service Limited | Water & waste | 2008 |
| Exclusive Shipping Ltd | Transport & logistics | 2020 |
| Excluzee Leadership Services Ltd | Information & communication | 2023 |
| Executor Help Plus Limited | Professional & scientific | 2007 |
| Exemplar Law Limited | Professional & scientific | 2017 |
| Exemplary Developments Ltd. | Construction | 2017 |
| Exley Transport Limited | Transport & logistics | 2020 |
| Exotic Explorers (Essex) Limited | Education | 2019 |
| Expeto Limited | Information & communication | 2008 |
| Express Print Solutions Limited | Manufacturing | 2016 |
| Express Trade UK Ltd | Construction | 2018 |
| Extac Limited | Professional & scientific | 2011 |
| Extra Digit Limited | Information & communication | 2005 |
| EYE Bray Limited | Professional & scientific | 2017 |
| Eyeconic Media Ltd | Professional & scientific | 2018 |
| EYN Consulting Ltd | Health & social care | 2022 |
| Eyry Ltd | Real estate | 2020 |
| F C S Media Ltd | Professional & scientific | 2022 |
| F H Analytics Limited | Administrative & support | 2025 |
| F J Caring Limited | Wholesale & retail | 2024 |
| F P E Limited | Transport & logistics | 2017 |
| F Y I Services Limited | Construction | 2004 |
| F&B Group Limited | Construction | 2015 |
| F&Hcc Ground Maintenance Limited | Administrative & support | 2024 |
| F.C. Frost Limited | Real estate | 1971 |
| F9 Consulting Ltd | Professional & scientific | 2012 |
| FA Innovations (UK) Ltd | Professional & scientific | 2014 |
| Faber Capital Limited | Financial services | 2015 |
| Fabian Services Limited | Construction | 2016 |
| Fabrics Direct (UK) Limited | Wholesale & retail | 1999 |
| Fabrikad Ltd | Professional & scientific | 2014 |
| Faceovia Limited | Health & social care | 2025 |
| Fact NOT Fiction Forecasting Ltd | Professional & scientific | 2020 |
| Fadimilehin Holdings Ltd | Real estate | 2021 |
| Faherty Build Limited | Construction | 2020 |
| Fair Links Estates Ltd | Construction | 2014 |
| Fairlawns Management Limited | Households | 1981 |
| Fairview Property Enterprises Limited | Real estate | 2009 |
| Fairview SA Limited | Hospitality | 2019 |
| Falcon Coordination Ltd | Construction | 2024 |
| Falcon Engineering Limited | Manufacturing | 2001 |
| Falkonz Solutions Ltd | Professional & scientific | 2021 |
| Fame TEL Ltd | Information & communication | 2023 |
| Family GP Services Ltd | Health & social care | 2022 |
| Family Loving Care Ltd | Health & social care | 2025 |
| Family Tree Gardens Ltd. | Administrative & support | 2017 |
| Fancraft Property Management Limited | Households | 1993 |
| Farah Halabi Ltd | Other services | 2019 |
| Farm & Table Ltd | Wholesale & retail | 2026 |
| Farmer Scotts Ltd | Extraterritorial | 2023 |
| Farmshed Limited | Hospitality | 2023 |
| Farringdons Property Investment Company Ltd | Other services | 2022 |
| Farsound Aviation Limited | Wholesale & retail | 1986 |
| Farusi Properties Ltd | Real estate | 2023 |
| Fast Track Haulage Ltd | Transport & logistics | 2019 |
| Fast Track Passports and Visas Ltd | Administrative & support | 2017 |
| Fast Trak Consulting Limited | Professional & scientific | 2002 |
| Faster Finance Ltd | Other services | 2017 |
| Faze Caterers Limited | Hospitality | 2015 |
| Fbrm Ltd | Professional & scientific | 2025 |
| Fcce Limited | Wholesale & retail | 2016 |
| Fedz Steelworks Ltd | Construction | 2014 |
| Feedforward Ltd. | Information & communication | 2017 |
| Feelarp Best Ltd | Wholesale & retail | 2022 |
| Felix Restaurants (Warley) Ltd | Other services | 2017 |
| Felix Restaurants Ltd | Other services | 2016 |
| Felsted Mill Litho Limited | Manufacturing | 1991 |
| Fenchurch Contracts Limited | Construction | 2006 |
| Fencing in Chelmsford Ltd | Construction | 2024 |
| Fenix LAB Ltd | Information & communication | 2025 |
| Fergus Marr Limited | Arts & recreation | 2020 |
| Fermentation Limited | Wholesale & retail | 2016 |
| Fern Art Limited | Arts & recreation | 2024 |
| Fern Garden Rooms Ltd | Manufacturing | 2020 |
| Fernando Capital Investment (FCI) Ltd | Real estate | 2024 |
| Fete Roome Ltd | Hospitality | 2017 |
| FGP Holdings Limited | Financial services | 2022 |
| FGP Investments Limited | Real estate | 2022 |
| Fibcore Ltd | Information & communication | 2024 |
| Fibre Trade Global Limited | Wholesale & retail | 2026 |
| Fidei Limited | Financial services | 2016 |
| Fidsy AI Solutions Ltd | Information & communication | 2025 |
| Fidsy Ltd | Information & communication | 2015 |
| Fif-T-Shirts of Grey Limited | Wholesale & retail | 2022 |
| FIN and Flounder Wholesale Ltd | Wholesale & retail | 2022 |
| Fina Casas Limited | Administrative & support | 2010 |
| Financial Conections Limited | Professional & scientific | 2022 |
| Financial Risk Solutions Ltd | Administrative & support | 2007 |
| Findit Entertainment International Limited | Arts & recreation | 2019 |
| Findit Entertainments Limited | Arts & recreation | 2019 |
| Fine Oak Building Limited | Construction | 2009 |
| Fine Property Rentals Ltd | Real estate | 2022 |
| Finesse Flooring Contracts Ltd | Construction | 2020 |
| Finity.Io Ltd | Information & communication | 2022 |
| Finsolve Consulting Limited | Professional & scientific | 2024 |
| Finstream Consultancy Ltd | Information & communication | 2015 |
| Finwell Coaching & Consulting Ltd | Professional & scientific | 2016 |
| Firdous Consultants Limited | Health & social care | 2020 |
| Fire Check Pro Ltd | Public administration | 2025 |
| Fire Door Care Limited | Manufacturing | 2024 |