| F.B. Hale & Company | | 1994 |
| F.E.D. Services Ltd | Transport & logistics | 2025 |
| F.H. Baddeley (Penn) Limited | Professional & scientific | 1964 |
| F.M. Property Solutions Limited | Real estate | 2019 |
| F40 Automotive Services Ltd | Wholesale & retail | 2019 |
| F9 Marketing Ltd | Professional & scientific | 2019 |
| FAB Ideas Limited | Professional & scientific | 2000 |
| FAB Motor Group Ltd | Wholesale & retail | 2024 |
| Fabine Investments Limited | Real estate | 1935 |
| Fabio Holdings Ltd | Real estate | 2025 |
| Fable and Wood Limited | Construction | 2024 |
| Fabulous Things Ltd | Wholesale & retail | 2017 |
| Factor E Studios Ltd | Arts & recreation | 2022 |
| Factoryfirst.Com Limited | Wholesale & retail | 2003 |
| Faheem Used Cars Ltd | Wholesale & retail | 2025 |
| Fahh Solutions Ltd | Other services | 2021 |
| Fahm Intelligence Ltd | Information & communication | 2023 |
| Fair Acre (High Wycombe) Management Company Limited | Households | 2016 |
| Fair Property Developers Ltd | Construction | 2018 |
| Fairchild Group Ltd | Financial services | 2025 |
| Fairlawns Roofing Limited | Construction | 2025 |
| Fairway Green Limited | Professional & scientific | 2021 |
| Fairwind Aero Ltd | Manufacturing | 2013 |
| Faith Associates International CIC | Professional & scientific | 2017 |
| Faith Associates Ltd | Professional & scientific | 2006 |
| Faith Worldwide Ltd | Other services | 2017 |
| Fakoly Ltd | Wholesale & retail | 2021 |
| Falak Travel Limited | Administrative & support | 2020 |
| Falcon Carriers Ltd | Transport & logistics | 2020 |
| Falcon Security Systems Limited | Administrative & support | 2000 |
| Falcon Sports Group Limited | Manufacturing | 2020 |
| Falcon Sports Promo Limited | Wholesale & retail | 2025 |
| Falcon Wharf Limited | Construction | 2005 |
| Fambox Solutions Limited | Health & social care | 2025 |
| Famlauren Limited | Information & communication | 2023 |
| Fantasy Consulting Ltd | Information & communication | 2018 |
| Fantazme Ltd | Wholesale & retail | 2025 |
| Farbahn Consulting Ltd | Professional & scientific | 2023 |
| Farina Meditranian Ltd | Information & communication | 2020 |
| Farm House (High Wycombe) Limited | Hospitality | 2013 |
| Farmhouse Pizza IR Ltd | Hospitality | 2021 |
| Farnham Realisations PLC | Financial services | 1962 |
| Farooq Yaqub Ltd | Real estate | 2025 |
| Farrods Water Engineers Limited | Extraterritorial | 1979 |
| Farrow Glazing Limited | Construction | 2022 |
| Farrow Lifting Limited | Other services | 2022 |
| Farsight Logistics Ltd | Professional & scientific | 2025 |
| Fascinating Songs Ltd | Information & communication | 2020 |
| Fashion Crafts Ltd | Wholesale & retail | 2021 |
| Fashion Heights UK Ltd | Other services | 2021 |
| Fast Casual Investment Group UK Ltd | Hospitality | 2025 |
| Fast EV Charging Limited | Construction | 2026 |
| Fast Freight Services Limited | Transport & logistics | 2022 |
| Fast Lane Classics Limited | Wholesale & retail | 2012 |
| Fast Mobile Tyres & Recovery Limited | Wholesale & retail | 2025 |
| Fast Tradelink UK Ltd | Wholesale & retail | 2026 |
| Fastcentral Limited | Real estate | 1988 |
| Fastrehab Ltd | Wholesale & retail | 2026 |
| Fasttrack Property Sales Ltd. | Real estate | 2025 |
| Father's Cafe Ltd | Hospitality | 2012 |
| Fatherhood Alliance UK Ltd | Health & social care | 2025 |
| Fatherland Conferences,Multicultural Events, Sports,And African Music Promotions Ltd | Administrative & support | 2024 |
| Fatima Muneeb Limited | Wholesale & retail | 2025 |
| Fatpixel Ltd | Information & communication | 2023 |
| Faulkner Health Limited | Health & social care | 2023 |
| Favour IT Ltd | Wholesale & retail | 2024 |
| FBA Central Ltd | Wholesale & retail | 2024 |
| FBC Priority UK Limited | Information & communication | 2023 |
| FBS Consulting Ltd | Professional & scientific | 2015 |
| Featuring Productions Ltd | Construction | 2023 |
| Feelgood Property Ltd | Real estate | 2019 |
| Feelworld UK Limited | Manufacturing | 2020 |
| Feet for Life Limited | Health & social care | 2002 |
| Felden Heights Residents Association Limited | Households | 1999 |
| Ferdons Limited | Professional & scientific | 2021 |
| Ferreros Dessert Limited | Hospitality | 2021 |
| Fertility Fitness Limited | Other services | 2012 |
| Feudal Forge Foundry Ltd. | Manufacturing | 2024 |
| FF Headwear (Emei) Limited | Manufacturing | 2014 |
| FHA (Franchising) Ltd | Other services | 2018 |
| Fibertech Carpet Care Ltd | Administrative & support | 2025 |
| Fibre and Wireless Limited | Information & communication | 2025 |
| Fibreglass FUN UK Limited | Manufacturing | 2024 |
| Fiction Republic Limited | Arts & recreation | 2022 |
| Fiddlewood Services Limited | Information & communication | 2026 |
| Fidget Limited | Information & communication | 1984 |
| Fiducia International Holding Ltd | Other services | 2022 |
| Fieldgrove (Penn) Management Co Ltd | Households | 2018 |
| Fields Communication Systems Ltd | Construction | 2023 |
| Fiesta Art Limited | Manufacturing | 2010 |
| Fifth Quadrant Realty Limited | Financial services | 2025 |
| Fighting for Fitness Limited | Other services | 2013 |
| Figure 8 Ltd | Arts & recreation | 2025 |
| Filia Global Ltd | Hospitality | 2022 |
| Filip Scaffolding Ltd | Construction | 2015 |
| Film and TV Production Accounting Limited | Information & communication | 2017 |
| Film Lighting Solutions Ltd | Construction | 2021 |
| Filterless Ltd | Professional & scientific | 2024 |
| FIN2GO Ltd | Financial services | 2011 |
| Finborough Design Limited | Wholesale & retail | 2017 |