| Excelerate Resources Limited | Professional & scientific | 2004 |
| EXP Productions Ltd | Education | 2015 |
| Experience Reimagined Ltd | Professional & scientific | 2018 |
| Expertek Consultants Limited | Professional & scientific | 1992 |
| EXPOSURE21 Limited | Professional & scientific | 2022 |
| Express Scaffolding Limited | Construction | 2012 |
| Extreme Frontier Ltd | Extraterritorial | 2013 |
| EZC Property Limited | Real estate | 2021 |
| F Bilby Consulting Ltd | Extraterritorial | 2024 |
| F7 Fire Safety Limited | Public administration | 2018 |
| Fabel Consulting Ltd | Professional & scientific | 2026 |
| Faber Martial Arts Limited | Health & social care | 2025 |
| Fable Home Goods UK Limited | Wholesale & retail | 2024 |
| Fabrique Ltd | Hospitality | 2011 |
| Fabulous Females Collective Ltd | Wholesale & retail | 2025 |
| Fabulous Females Holdings Ltd | Financial services | 2025 |
| Facs Limited | Agriculture & fishing | 2002 |
| Fade Golf Coventry Ltd | Health & social care | 2023 |
| Fade Golf Warwick Ltd | Health & social care | 2021 |
| Fairford Opticians Limited | Wholesale & retail | 2016 |
| Fairline Consultancy Limited | Information & communication | 2024 |
| Fairnorth Properties Limited | Real estate | 2019 |
| Fairtiq UK Limited | Information & communication | 2021 |
| Fairways for Good Ltd | Administrative & support | 2025 |
| Family Intervention Counselling Service C.I.C. | Health & social care | 2016 |
| Fantasy Sports Arena Ltd | Arts & recreation | 2024 |
| FAR Horizon Cornwall Ltd | Real estate | 2026 |
| FAR Pool Meadow Management Company Limited | Real estate | 2001 |
| Farlo Ltd | Information & communication | 2025 |
| Farmette Ltd | Information & communication | 2025 |
| Farnsfield Pharmacy Limited | Wholesale & retail | 2002 |
| Farrell Carpentry Limited | Manufacturing | 2024 |
| Farriers Yard Ltd | Households | 2024 |
| Farthing Holdings | Other services | 2017 |
| FAS Medical Services Limited | Health & social care | 2024 |
| Fashiondealer Ltd | Wholesale & retail | 2024 |
| Fassi (U.K.) Limited | Administrative & support | 1978 |
| Fast Frame Systems Limited | Construction | 2000 |
| Fast Lane Asia Holdings Limited | Information & communication | 2015 |
| Fastech Services Limited | Wholesale & retail | 2025 |
| Fastframe Systems UK Limited | Manufacturing | 2009 |
| Faulx Group Limited | Financial services | 2024 |
| Fcwm Property Ltd | Real estate | 2021 |
| Featherbed Architects Limited | Professional & scientific | 2020 |
| Featherbed Fruits Ltd | Agriculture & fishing | 2020 |
| Featherbed Properties Limited | Real estate | 2020 |
| Featherbow Woodcraft Limited | Manufacturing | 2002 |
| Feeding Untied Limited | Health & social care | 2017 |
| Feel Better Clinic Ltd | Health & social care | 2017 |
| Feel the Grip Limited | Arts & recreation | 2023 |
| Feet Forward Ltd | Financial services | 2018 |
| Feldon Dunsmore Legal Limited | Professional & scientific | 2015 |
| Feldon Dunsmore Trustees Limited | Professional & scientific | 2025 |
| Feldon Flooring Ltd | Construction | 2022 |
| Feldts Seafood Ltd | Wholesale & retail | 2019 |
| Fenestra Retrofit Limited | Manufacturing | 2009 |
| Fenwick Enterprises Limited | Manufacturing | 2010 |
| Fernhill Farms Ltd | Agriculture & fishing | 2009 |
| Ferrum Packaging UK Limited | Manufacturing | 2022 |
| Fetchxpress Limited | Transport & logistics | 2024 |
| Fiare UK Limited | Administrative & support | 2007 |
| Fiber-Quant Limited | Wholesale & retail | 2024 |
| Fiberdyne Limited | Administrative & support | 2007 |
| Fibersense UK Ltd | Professional & scientific | 2022 |
| Fibre Network Services Limited | Information & communication | 2007 |
| Fieldgate Consultants Limited | Other services | 2017 |
| Fifo Clinical Consulting Ltd | Professional & scientific | 2026 |
| Fifon Ltd | Transport & logistics | 2019 |
| Fiibac Ltd | Information & communication | 2023 |
| Filbert Homes Ltd | Real estate | 2015 |
| Filice Properties Limited | Real estate | 2019 |
| Films R US Limited | Extraterritorial | 2021 |
| Finance Clarity Ltd | Professional & scientific | 2026 |
| Finance Spot Ltd | Professional & scientific | 2025 |
| Financial Mentor Limited | Administrative & support | 2007 |
| Finca of Warwick Limited | Information & communication | 2021 |
| Finds Big & Small Ltd | Wholesale & retail | 2025 |
| Finehames Limited | Real estate | 2004 |
| Fingerprint Brewing Company Ltd | Manufacturing | 2018 |
| Finka Systems Limited | Information & communication | 2007 |
| Finlarg Farm Escapes Limited | Hospitality | 2025 |
| Finnish British Chamber of Commerce | Other services | 2001 |
| Finwood Holdings Limited | Professional & scientific | 2025 |
| Fiorentini U.K. Ltd. | Manufacturing | 1990 |
| Fire & Earth Leamington Limited | Health & social care | 2022 |
| Fire and Earth Warwick Ltd | Health & social care | 2023 |
| Fire Eater UK Limited | Administrative & support | 2009 |
| Fire Risk Management Services (UK) Limited | Public administration | 2014 |
| Fire Risk Management Services Training (UK) Ltd | Administrative & support | 2022 |
| Fire Safety Solutions (UK) Ltd | Administrative & support | 2014 |
| Fireball Rally Limited | Administrative & support | 2013 |
| Firefly Advisors Limited | Professional & scientific | 2007 |
| Firefly Partners Limited | Professional & scientific | 2013 |
| Firemind Ltd | Information & communication | 2018 |
| Firemon Limited | Other services | 2011 |
| Fires Number 1 Limited | Manufacturing | 1965 |
| Fires Number 2 Limited | Professional & scientific | 1920 |
| Firesteed Capital Limited | Professional & scientific | 1999 |
| Fish in a Bottle Limited | Information & communication | 2003 |
| Fistral Waves Management Company Limited | Households | 2009 |